Battery box and battery pack

Abstract

The present invention discloses a battery box and a battery pack, wherein the battery box comprises a bottom plate, a surrounding frame and a partition beam assembly, wherein the surrounding frame is arranged around the bottom plate, the surrounding frame is fixedly connected to the bottom plate, the bottom plate and the surrounding frame form a storage bin, the storage bin is used to place batteries, the partition beam assembly comprises a first beam body, a second beam body and a first connecting component, the first beam body extends along a first direction, the second beam body extends along a second direction, the first direction and the second direction are arranged at a first angle, the first angle is between 85° and 95°, the first direction and the second direction are both parallel to the large surface of the bottom plate, the partition beam assembly divides the storage bin into a plurality of sub-storage bins, the first connecting component comprises a first bottom plate portion and two first side plate portions connected to each other, the first bottom plate portion is fixedly connected to the first beam body along the second direction, the two first side plate portions are arranged at intervals along the first direction, and the two first side plate portions are both connected to the second beam body along the first direction, and the projection of the second beam body along the second direction covers the first bottom plate portion.

Description

Technical Field

[0001] The present invention relates to the technical field of battery boxes, and in particular to a battery box and a battery pack. Background Art

[0002] A partition beam assembly is provided in the battery box of an electric vehicle. The partition beam assembly is used to divide the internal space of the battery box into a plurality of relatively independent sub-spaces, each of which is used to accommodate batteries. In the related art, the structural design of the partition beam assembly lacks rationality, resulting in the partition beam assembly occupying too much internal space of the battery box and easily interfering with the battery, which is not conducive to the installation of the battery.

[0003] Therefore, how to provide a solution to overcome or alleviate the above-mentioned defects is still a technical problem that needs to be solved urgently by those skilled in the art. Summary of the invention

[0004] An object of the present invention is to provide a battery case and a battery pack, wherein a partition beam assembly in the battery case can occupy relatively less internal space of the battery case, is less likely to interfere with the battery, and can facilitate the installation of the battery.

[0005] To solve the above technical problems, the present invention provides a battery box, including a bottom plate, a frame and a partition beam assembly, wherein the frame is arranged around the bottom plate and is fixedly connected to the bottom plate, the bottom plate and the frame are combined to form a storage bin, and the storage bin is used to place multiple batteries, the partition beam assembly includes a first beam body, a second beam body and a first connecting component, the first beam body extends along a first direction, the second beam body extends along a second direction, the first direction and the second direction are arranged at a first angle, the first angle is between 85° and 95°, the first direction and the second direction are both parallel to the large surface of the bottom plate, the first beam body and the second beam body divide the storage bin into multiple sub-storage bins, the first connecting component includes a first bottom plate portion and two first side plate portions connected to each other, the first bottom plate portion is fixedly connected to the first beam body along the second direction, the two first side plate portions are arranged at intervals along the first direction, and the two first side plate portions are connected to the second beam body along the first direction, and the projection of the second beam body along the second direction covers the first bottom plate portion.

[0006] In the above solution, the projection of the second beam along the second direction covers the first bottom plate, which is equivalent to using the installation space of the second beam to accommodate the first bottom plate, and the first bottom plate will not extend out of the second beam along the first direction, which can reduce the occupation of the internal space of 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, which can facilitate the installation of the battery inside the battery box, and allow more space in the battery box to install the battery, which is also conducive to improving the energy density of the battery box.

[0007] Optionally, the first side plate portion is located in an inner cavity of the second beam body.

[0008] Optionally, the second beam body includes two second beam plates arranged relatively to each other along a third direction, the third direction and the first direction and the second direction are all arranged at a second angle, the second angle is between 85° and 95°, and one of the two second beam plates is provided with an avoidance gap; the size of the first connecting component in the second direction is L1, the size of the avoidance gap in the second direction is L2, the size of the second beam body in the second direction is L3, and 0.3×L3≥L2≥L1.

[0009] Optionally, the first side plate portion is located on the outer side of the second beam body, and a thickness of the first side plate portion is between 0.5 mm and 3 mm.

[0010] Optionally, an insulating layer is provided on at least one side of the first side plate portion away from the second beam body along the first direction.

[0011] Optionally, the second direction is the front-rear direction of the vehicle, the thickness of the first beam body is greater than the thickness of the second beam body; the second beam body is provided with a slot portion extending along a third direction, the third direction is arranged at an angle to the first direction and the second direction, and the first beam body is inserted into the slot portion along the third direction.

[0012] Optionally, it also includes a second connecting component, the second connecting component includes a second bottom plate portion, two second side plate portions and two wing plate portions, the second bottom plate portion is connected through the two second side plate portions and the two wing plate portions respectively, the second bottom plate portion is arranged on the upper part of the second beam body and fixedly connected to the second beam body, the large surface of the second bottom plate portion is parallel to the first surface of the second beam body, the second side plate portion and the second surface of the second beam body are arranged in parallel, the first surface and the second surface are arranged at a third angle, and the third angle is between 60° and 120°, the two wing plate portions are arranged on the upper part of the first beam body and fixedly connected to the first beam body, the wing plate portions are arranged parallel to the first surface, the size of the second beam body along the third direction is larger than that of the first beam body, the third direction and the first direction and the second direction are all arranged at a second angle, and the second angle is between 85° and 95°.

[0013] Optionally, the projection of the slotted portion along the first direction is a rectangle, and the sum of the dimensions of the first beam body and the two first bottom plate portions in the second direction matches the dimension of the slotted portion in the second direction.

[0014] Optionally, the slotted portion includes a first slot section and a second slot section, the second slot section is closer to the slot opening of the slotted portion relative to the first slot section, and the size of the second slot section in the second direction is larger than the size of the first slot section in the second direction; the size of the first beam body in the second direction is adapted to the size of the first slot section in the second direction, and the sum of the sizes of the second beam body and the two first bottom plate portions in the second direction is adapted to the size of the second slot section in the second direction.

[0015] Optionally, at least one of the first beam body and the second beam body is connected to the first connecting component by a combination of welding and connecting piece connection.

[0016] Optionally, a ratio of a size of the first connecting component in the third direction to a size of the first beam body in the third direction is between 0.6 and 1, the third direction is arranged at an angle to the first direction and the second direction, and a projection of the first beam body along the second direction covers the first connecting component.

[0017] Optionally, a reinforcement portion is provided between the first bottom plate portion and the first side plate portion.

[0018] The present invention further provides a battery pack, comprising a battery case and a plurality of batteries arranged inside the battery case, wherein the battery case is the above-mentioned battery case. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1A schematic diagram of the structure of a battery pack provided by an embodiment of the present invention;

[0020] Figure 2 is a structural schematic diagram of a partition beam assembly;

[0021] Figure 3 for Figure 2 A partial enlarged view of the connection between the first beam body and the second beam body;

[0022] Figure 4 for Figure 3 Exploded view of;

[0023] Figure 5 for Figure 4 A connection structure diagram of the first connection component and the first beam body;

[0024] Figure 6 A diagram showing the matching structure of the first connecting component and the second beam body;

[0025] Figure 7 is a partial enlarged view of the second beam body at the slotted portion;

[0026] Figure 8 for Figure 7 Structural schematic diagram of the middle deformation scheme;

[0027] Fig. 9 is a schematic structural diagram of a second connecting component;

[0028] Fig.10 It is a structural schematic diagram of a second beam body with an avoidance gap;

[0029] Fig.11 for Fig.10 A partial enlarged view of the groove and avoidance gap.

[0030] Reference numerals:

[0031] 1000-battery box; 1100-bottom plate; 1200-enclosure frame; 1300-separation beam assembly; 1400-sub-containment compartment;

[0032] 2000-battery;

[0033] 100-first beam;

[0034] 200-second beam body; 200A-first surface; 200B-second surface; 210 second beam plate; 211-avoidance gap; 220-grooved portion; 221-first groove section; 222-second groove section; 230-groove bottom connecting portion;

[0035] 300-first connecting member; 310-first bottom plate portion; 311-first bottom plate connecting hole; 320-first side plate portion; 321-first side plate connecting hole; 330-reinforcement portion;

[0036] 400 - second connecting component; 410 - second bottom plate portion; 411 - second bottom plate connecting hole; 420 - second side plate portion; 421 - second side plate connecting hole; 430 - wing plate portion; 431 - wing plate connecting hole. DETAILED DESCRIPTION

[0037] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0038] In the embodiments of the present invention, the terms "first", "second", and "third" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first", "second", and "third" may explicitly or implicitly include one or more of the features.

[0039] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium.

[0040] The directional terms mentioned in the embodiments of the present invention, such as "inside", "outside", etc., are only references to the directions of the drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of the present invention, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0041] In the description of the embodiments of the present invention, the terms "comprises", "includes" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0042] Please refer to Figure 1 , Figure 1 A schematic diagram of the structure of a battery pack provided by an embodiment of the present invention.

[0043] like Figure 1 As shown, an embodiment of the present invention provides a battery pack, including a battery case 1000 and a plurality of batteries 2000 .

[0044] The battery box 1000 includes a bottom plate 1100, a frame 1200 and a partition beam assembly 1300. The frame 1200 is arranged around the bottom plate 1100, and the frame 1200 is fixedly connected to the bottom plate 1100, and the specific fixed connection method includes but is not limited to welding, screw connection, riveting, etc. The bottom plate 1100 and the frame 1200 are enclosed to form a storage bin, and the storage bin is used to place multiple batteries 2000. The partition beam assembly 1300 is arranged in the storage bin and is used to be connected to the frame 1200 to divide the storage bin into multiple sub-storage bins 1400, and each sub-storage bin 1400 is provided with multiple batteries 2000.

[0045] As described in the background technology section, in the related art, the structural design of the partition beam assembly lacks rationality, resulting in the partition beam assembly occupying too much internal space of the battery box and easily interfering with the battery, which is not conducive to the installation of the battery. In view of this, the embodiment of the present invention also proposes a new partition beam assembly 1300.

[0046] Specifically, please refer to Figure 2-Figure 11 , Figure 2 A schematic structural diagram of a partition beam assembly of a battery box provided in an embodiment of the present invention; Figure 3 for Figure 2 A partial enlarged view of the connection between the first beam body and the second beam body; Figure 4 for Figure 3 Exploded view of; Figure 5 for Figure 4 A connection structure diagram of the first connection component and the first beam body; Figure 6 A diagram showing the matching structure of the first connecting component and the second beam body; Figure 7 It is a partial enlarged view of the second beam body at the slotted portion; Figure 8 for Figure 7 Structural schematic diagram of the middle deformation scheme; Fig. 9 is a schematic structural diagram of a second connecting component; Fig.10 It is a structural schematic diagram of a second beam body with an avoidance gap; Fig.11 for Fig.10 A partial enlarged view of the groove and avoidance gap.

[0047] like Figure 2-Figure 6 As shown, in the embodiment of the present invention, the partition beam assembly 1300 includes a first beam body 100 , a second beam body 200 and a first connecting component 300 .

[0048] The first beam body 100 extends along the first direction X, and the second beam body 200 extends along the second direction Y. The structural forms of the first beam body 100 and the second beam body 200 are not limited here, and can be determined in combination with actual use needs, for example, the first beam body 100 and the second beam body 200 can both be tubular beams. The first direction X and the second direction Y are arranged at a first angle, and the first angle can be specifically between 85° and 95°, for example, 90°, etc. Moreover, the first direction X and the second direction Y can both be parallel to the large surface of the bottom plate 1100. It should be understood that the large surface of the bottom plate 1100 refers to a surface with a relatively large area in the bottom plate 1100. In the embodiment of the present invention, the large surface can refer to a side of the bottom plate 1100 facing the storage bin.

[0049] The first connecting member 300 may be roughly U-shaped, including a first bottom plate portion 310 and two first side plates 320 connected to each other. The first bottom plate portion 310 is fixedly connected to the first beam body 100 along the second direction Y, and at this time, the two first side plates 320 are spaced apart along the first direction X, and the two first side plates 320 are connected to the second beam body 200 along the first direction X.

[0050] After the first beam 100, the second beam 200 and the first connecting member 300 are assembled, the projection of the second beam 200 along the second direction Y covers the first bottom plate 310. In this way, the installation space of the second beam 200 is used to accommodate the first bottom plate 310, and the first bottom plate 310 will not extend out of the second beam 200 along the first direction X, which can reduce the occupation of the internal space of the battery box 1000; at the same time, the possibility of interference between the first connecting member 300 and the battery 2000 inside the battery box 1000 can be reduced, which can facilitate the installation of the battery 2000 inside the battery box 1000, and allow more space in the battery box 1000 to install the battery 2000, which is also conducive to improving the energy density of the battery box 1000.

[0051] During specific installation, the first bottom plate portion 310 and the first beam body 100 may be connected first to achieve installation and fixation of the first connecting component 300 on the first beam body 100 , and then the first side plate portion 320 and the second beam body 200 may be connected.

[0052] Here, the embodiment of the present invention does not limit the connection method between the first bottom plate portion 310 and the first beam body 100, and the connection method between the first side plate portion 320 and the second beam body 200. In practical applications, those skilled in the art can make a selection according to specific needs as long as it can meet the requirements of use.

[0053] In a specific example, Figure 5As shown, the first bottom plate portion 310 may be provided with a first bottom plate connection hole 311, and the first side plate portion 320 may be provided with a first side plate connection hole 321. The number and distribution positions of the first bottom plate connection holes 311 and the first side plate connection holes 321 are not limited here. In actual assembly, a connector in the form of a bolt, a rivet, etc. may be prepared, and then the connector may be used to pass through the first bottom plate connection hole 311 and the first side plate connection hole 321, respectively, so as to respectively realize the connection of the connectors between the first bottom plate portion 310 and the first beam body 100, and between the first side plate portion 320 and the second beam body 200.

[0054] On the basis of the connection of the above-mentioned connecting parts, the first bottom plate part 310 and the first beam body 100, and the first side plate part 320 and the second beam body 200 can also be connected by welding process for secondary connection, so as to improve the connection reliability between the first connecting part 300 and the first beam body 100 and the second beam body 200 to a greater extent, and thus the structural strength of the partition beam assembly 1300 provided by the embodiment of the present invention can be guaranteed to a greater extent. When performing the above-mentioned secondary connection, since the first bottom plate part 310 and the first beam body 100, and the first side plate part 320 and the second beam body 200 are already connected by the connecting parts, there is basically no relative displacement between the first bottom plate part 310 and the first beam body 100, and between the first side plate part 320 and the second beam body 200, which is more conducive to the implementation of the welding process.

[0055] It should be understood that any one of the first bottom plate portion 310 and the first side plate portion 320 can also be installed and fixed by connecting with a connector, welding, clamping, or the like, as long as the reliability requirement of the connection can be guaranteed.

[0056] In some optional implementations, a reinforcement portion 330 may be further disposed between the first bottom plate portion 310 and the first side plate portion 320 .

[0057] The reinforcing portion 330 can improve the connection strength between the first bottom plate portion 310 and the first side plate portion 320, thereby effectively ensuring the structural strength of the first connecting member 300. During installation and subsequent use, the angle between the first bottom plate portion 310 and the first side plate portion 320 is not easily changed, that is, the possibility of relative rotation between the first side plate portion 320 and the first bottom plate portion 310 can be reduced, so that the connection strength between the first beam body 100 and the second beam body 200 can be better ensured.

[0058] The number, location, and structure of the reinforcing portion 330 are not limited herein. In practical applications, those skilled in the art can determine them according to specific needs. For example, by stamping a local position of the connection between the first bottom plate portion 310 and the first side plate portion 320, an inward convex protrusion can be formed between the first bottom plate portion 310 and the first side plate portion 320, and the protrusion can serve as the reinforcing portion 330 mentioned above; two (such as Figure 5 As shown in the figure, a reinforcement part 330 or above is provided to ensure the reinforcement effect of the reinforcement part 330.

[0059] In some optional implementations, such as Figure 7 and Figure 8 As shown, the second beam body 200 may be provided with a slot portion 220 extending along the third direction Z. The second beam body 200 may be specifically inserted into the first beam body 100 along the third direction Z through the slot portion 220 and the first connecting component 300 installed on the first beam body 100 .

[0060] The third direction Z and the aforementioned first direction X and second direction Y may be arranged at a second angle, and the second angle may be between 85° and 95°, for example, 90°, etc. In a specific example, the battery box 1000 provided by the embodiment of the present invention is arranged in a vehicle, and the vehicle is on a horizontal ground. At this time, the first direction X and the second direction Y may be in a horizontal plane, and the third direction Z may be perpendicular to the horizontal plane. The third direction Z may also be referred to as an up-down direction or a vertical direction.

[0061] The second beam body 200 may also be provided with a groove bottom connection portion 230 on one side of the groove portion 220 along the third direction Z, that is, the groove portion 220 does not penetrate the second beam body 200 along the third direction Z. With such a configuration, when the second beam body 200 is inserted into the first beam body 100, the second beam body 200 may be supported in the third direction Z by the groove bottom connection portion 230 and the first beam body 100, so that the relative positions of the second beam body 200, the first beam body 100 and the first connecting component 300 in the third direction Z can be ensured, thereby facilitating the connection between the second beam body 200 and the first connecting component 300. At the same time, the first beam body 100 can support the second beam body 200 along the third direction Z, and can also reduce the shear force along the third direction Z on the connection between the first bottom plate portion 310 and the first beam body 100, and the connection between the first side plate portion 320 and the second beam body 200, which is beneficial to ensuring the connection reliability between the first bottom plate portion 310 and the first beam body 100, and the connection reliability between the first side plate portion 320 and the second beam body 200, and has a positive significance for ensuring the connection strength and service life of the first beam body 100 and the second beam body 200.

[0062] In some optional implementations, such as Figure 3 and Figure 6 As shown, after the second beam body 200 and the first beam body 100 are installed, the first side plate portion 320 can be located outside the second beam body 200 , that is, in the first direction X, the second beam body 200 can be installed as a whole between the two first side plate portions 320 .

[0063] In this way, the second beam body 200 is not likely to interfere with the first side plate portion 320 during the process of being inserted into the first beam body 100, which can improve the convenience of inserting the second beam body 200 and the first beam body 100. At the same time, there is no need to provide a gap on the second beam body 200 to avoid the first side plate portion 320, which can reduce the impact on the structural strength of the second beam body 200 and is also conducive to ensuring the structural strength of the second beam body 200 itself.

[0064] In this implementation, the thickness of the first side plate portion 320 can be controlled between 0.5 mm and 3 mm. In this way, the first side plate portion 320 can occupy relatively less space inside the battery box 1000.

[0065] In this implementation, at least one side of the first side plate 320 away from the second beam 200 along the first direction X may be provided with an insulating layer (not shown in the figure). The insulating layer may be, for example, an insulating coating made of silicon nitride, silicon oxide, silicon oxynitride, etc., which may be formed by electrospraying, electroplating, etc., to achieve electrical isolation from the battery 2000, etc., to reduce the occurrence of short circuits, and to help ensure the safety of the battery box 1000 during use.

[0066] In one scenario, Figure 7 As shown, the projection of the slot portion 220 along the first direction X may be a rectangle. The sum of the dimensions of the first beam body 100 and the two first bottom plate portions 310 in the second direction Y may match the dimension of the slot portion 220 in the second direction Y. It should be noted that matching in the embodiment of the present invention means being substantially equal.

[0067] Specifically, combined Figure 5-Figure 7, the size of the slotted portion 220 in the second direction Y can be D3, the size of the first beam body 100 in the second direction Y can be D1, and the size of the first bottom plate portion 310 in the second direction Y can be D2. The first beam body 100 is provided with first connecting components 300 on both sides in the second direction Y, and D3 and (D1+2D2) can be compatible, that is, they can be roughly equal, so that the second beam body 200 can be inserted into the first beam body 100 and the two first bottom plates 310 through the slotted portion 220. At the same time, the distance between the inner wall surface of the slotted portion 220 in the second direction Y and the first bottom plate portion 310 can be relatively small, which can take into account the smoothness of the insertion and the stability of the structure after the insertion is completed.

[0068] In another embodiment, if Figure 8 As shown, the slot portion 220 can be designed as a stepped slot, including a first slot section 221 and a second slot section 222. The second slot section 222 is closer to the slot opening of the slot portion 220 relative to the first slot section 221. The dimension D5 of the second slot section 222 in the second direction Y can be greater than the dimension D4 of the first slot section 221 in the second direction Y.

[0069] The dimension D1 of the first beam body 100 in the second direction Y can be matched with the dimension D4 of the first slot section 221 in the second direction Y, that is, D1 and D4 can be roughly equal. In this way, the first beam body 100 can be inserted into the first slot section 221, and the distance between the inner wall surface of the slot of the first slot section 221 in the second direction Y and the first beam body 100 can be relatively small, which can take into account the smoothness of insertion and the stability of the structure after the insertion is completed. At the same time, since the distance between the inner wall surface of the slot of the first slot section 221 in the second direction Y and the first beam body 100 is relatively small, it is also possible to weld the inner wall surface of the slot and the first beam body 100, which can increase the length of the weld and is more conducive to ensuring the reliability of the connection between the first beam body 100 and the second beam body 200.

[0070] The sum of the dimensions of the second beam body 200 and the two first bottom plates 310 in the second direction Y can be matched with the dimension D5 of the second slot section 222 in the second direction Y, that is, D5 and (D3+2D2) can be approximately equal. In this way, the first beam body 100 and the two first bottom plates 310 can be inserted into the second slot section 222, and the distance between the inner wall surface of the second slot section 222 in the second direction Y and the first bottom plates 310 can be relatively small, which can take into account both the smoothness of the insertion and the stability of the structure after the insertion is completed.

[0071] In some optional implementations, the first side plate portion 320 may also be located on the inner side of the second beam body 200, that is, in the inner cavity of the second beam body 200. In this way, the projection of the second beam body 200 along the second direction Y can achieve full coverage of the first connecting component 300, and the first connecting component 300 can be located as a whole in the second beam body 200, which can reduce the occupation of the internal space of the battery box 1000 by the first connecting component 300 to a greater extent, and can avoid to a greater extent the short circuit problem caused by the overlap between the battery 2000 and the box due to the damage of the external insulating parts of the battery 2000 caused by the contact between the first connecting component 300 and multiple batteries 2000, thereby ensuring the safety of the battery box 1000 during use.

[0072] like Fig.10 and Fig.11 As shown, the second beam body 200 may include two second beam plates 210 arranged opposite to each other along the third direction Z, and one of the two second beam plates 210 may be provided with an avoidance notch 211, which may be connected to the slot portion 220. When the second beam body 200 is inserted into the first beam body 100 through the slot portion 220, the avoidance notch 211 may avoid the first side plate portion 320 of the first connecting member 300, thereby ensuring smooth insertion.

[0073] The size of the first connecting member 300 in the second direction Y is L1. The size of the avoidance gap 211 in the second direction Y is L2. The size of the second beam body 200 in the second direction Y is L3. L1, L2 and L3 can satisfy the following relationship: 0.3×L3≥L2≥L1. In this way, it can ensure that the avoidance gap 211 can reliably avoid the first connecting member 300, and it can also avoid the size of the avoidance gap 211 being too large, and it can reduce the impact on the strength of the second beam body 200 caused by the opening of the avoidance gap 211.

[0074] In some optional implementations, the ratio of the dimension H1 of the first connecting component 300 in the third direction Z to the dimension H2 of the first beam body 100 in the third direction Z may be between 0.6 and 1, and the projection of the first beam body 100 along the second direction Y may cover the first connecting component 300 .

[0075] In this way, it is possible to prevent the first connecting member 300 from protruding from the first beam body 100 in the third direction Z. Furthermore, when the second beam body 200 is inserted into the first beam body 100, it can be prevented that the first connecting member 300 causes the second beam body 200 to be suspended, that is, it can be prevented that the bottom connection portion 230 of the groove cannot abut against the first beam body 100 in the third direction Z, which is beneficial to ensuring the connection reliability between the first beam body 100 and the second beam body 200. At the same time, it is also possible to prevent the size H1 of the first connecting member 300 in the third direction Z from being too small, and the problem of the reduced connection reliability between the first connecting member 300, the first beam body 100, and the second beam body 200 caused thereby.

[0076] In some alternative implementation manners, the second direction Y may be the front-rear direction of the vehicle, and specifically, the front-rear direction refers to the direction from the vehicle head to the vehicle tail, which is also the driving direction of the vehicle.

[0077] Generally speaking, the battery box body 1000 is installed in the middle and rear section of the vehicle. In the second direction Y, the vehicle head and the like of the vehicle can all serve as energy-absorbing components. Thus, when the vehicle collides in the second direction Y, the force on the battery box body 1000 in the second direction Y is not large, that is, the force on the second beam body 200 is not large. However, when the side of the vehicle is impacted, the impact force will basically be directly transmitted to the battery box body 1000. In view of this, in the embodiments of the present invention, the thickness of the first beam body 100 can be set to be greater than the thickness of the second beam body 200 to enhance the structural strength of the first beam body 100, and the foregoing slotting portion 220 and the avoidance notch 211 and other structures that may affect the strength are not provided on the first beam body 100, so that the first beam body 100 can basically serve as a complete whole, thereby enhancing the side collision resistance of the battery box body 1000.

[0078] Based on the definition of directions in this implementation manner, the first beam body 100 can also be called a cross beam, and the second beam body 200 can also be called a longitudinal beam.

[0079] In some alternative implementation manners, the partition beam assembly 1300 provided by the present invention may further include a second connecting member 400. The second connecting member 400 can be connected to the bottom connection portion 230 of the groove along the third direction Z, and the second connecting member 400 can also be connected to the first beam body 100 to further improve the connection reliability between the first beam body 100 and the second beam body 200.

[0080] As Fig. 9 shown, the second connecting member 400 can be generally in a "Ji" shape, including a connected second bottom plate portion 410, two second side plate portions 420, and two wing plate portions 430. Combining Figure 7, the second beam body 200 may include a first surface 200A and two second surfaces 200B, the two second surfaces 200B are respectively located on both sides of the first surface 200A in the first direction X; the first surface 200A and the second surface 200B may be arranged at a third angle, and the third angle may be specifically between 60° and 120°, for example, 90°. The large surface (a surface with a larger area) of the second bottom plate portion 410 may be parallel to the first surface 200A, and the large surface (a surface with a larger area) of the second side plate portion 420 may be parallel to the second surface 200B. The second bottom plate portion 410 may be attached to and fixedly connected with the first surface 200A, specifically, it may be connected to the groove bottom connection portion 230 along the third direction Z, at which time, the two second side plate portions 420 may be arranged at intervals along the first direction X, and the two second side plate portions 420 may be respectively connected to the second surface 200B of the groove bottom connection portion 230, so as to improve the connection reliability of the second connection component 400 and the second beam body 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 body 100 along the third direction Z. In this way, the second connecting component 400 can be connected to the first beam body 100 and the second beam body 200 at the same time.

[0081] Referring to the orientation and position relationship in actual application, the second connecting component 400 is located on the upper side of the first beam body 100 as a whole, and does not occupy the internal space of the sub-accommodating chamber 1400, so it is not easy to interfere with the battery 2000 and cause battery safety failure. In addition, since the first connecting component 300 is connected to the second beam body 200 in the second direction Y, the part of the second beam body 200 located on the upper side of the first beam body 100, that is, the aforementioned groove bottom connecting portion 230, will be subject to a greater risk of deformation, which is particularly significant when the second beam body 200 adopts a hollow beam body; at this time, the above-mentioned second connecting component 400 is provided to cover the groove bottom connecting portion 230 and connect with the first beam body 100, which can increase the connection area, and can largely overcome the risk of deformation failure at the groove bottom connecting portion 230, and can improve the connection reliability of the first beam body 100 and the second beam body 200 to a greater extent. At the same time, the second connecting component 400 is also conducive to ensuring the relative position of the first beam body 100 and the second beam body 200 in the third direction Z, and can adapt to the size difference between the first beam body 100 and the second beam body 200 in the third direction Z.

[0082] In addition, the second connecting member 400 can also play a reinforcing role, which can reduce the failure of the connection between the first beam body 100 and the second beam body 200 caused by the deformation failure of the first connecting member 300. At the same time, the second connecting member 400 and the first connecting member 300 can realize the connection and fixation of the first beam body 100 and the second beam body 200 in three directions, and can better realize the connection and fixation of the first beam body 100 and the second beam body 200.

[0083] The connection method of the second connection component 400 and the first beam body 100 and the second beam body 200 may be consistent with the aforementioned first connection component 300, and a repeated description is not given here.

[0084] In a specific example, combining Fig. 9 The second bottom plate portion 410 may be provided with a second bottom plate connection hole 411, the second side plate portion 420 may be provided with a second side plate connection hole 421, and the wing plate portion 430 may be provided with a wing plate connection hole 431. Bolts, rivets, and other connecting members may pass through the second bottom plate connection hole 411, and may be used to achieve connection between the second bottom plate portion 410 and the second beam body 200. The second side plate connection hole 421 and the wing plate connection hole 431 may be filled with solder, and may be used to achieve welding and fixing of the second side plate portion 420 and the second beam body 200, and welding and fixing of the wing plate portion 430 and the first beam body 100.

[0085] The above are only preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A battery box, characterized in that: The invention comprises a bottom plate, a surrounding frame and a partition beam assembly, wherein the surrounding frame is arranged around the bottom plate and is fixedly connected to the bottom plate, the bottom plate and the surrounding frame are combined to form a storage bin, and the storage bin is used to place a plurality of batteries, the partition beam assembly comprises a first beam body, a second beam body and a first connecting component, the first beam body extends along a first direction, the second beam body extends along a second direction, the first direction and the second direction are arranged at a first angle, the first angle is between 85° and 95°, the first direction and the second direction are both parallel to the large surface of the bottom plate, the first beam body and the second beam body divide the storage bin into a plurality of sub-storage bins, the first connecting component comprises a first bottom plate portion and two first side plate portions connected to each other, the first bottom plate portion is fixedly connected to the first beam body along the second direction, the two first side plate portions are arranged at intervals along the first direction, and the two first side plate portions are connected to the second beam body along the first direction, and the projection of the second beam body along the second direction covers the first bottom plate portion.

2. The battery box according to claim 1, characterized in that: The first side plate portion is located in the inner cavity of the second beam body.

3. The battery box according to claim 2, characterized in that: The second beam body comprises two second beam plates arranged opposite to each other along a third direction, the third direction and the first direction and the second direction are all arranged at a second angle, the second angle is between 85° and 95°, and one of the two second beam plates is provided with an avoidance notch; The size of the first connecting component in the second direction is L1, the size of the avoidance gap in the second direction is L2, the size of the second beam body in the second direction is L3, and 0.3×L3≥L2≥L1.

4. The battery box according to claim 1, characterized in that: The first side plate portion is located on the outer side of the second beam body, and the thickness of the first side plate portion is between 0.5 mm and 3 mm.

5. The battery box according to claim 4, characterized in that: An insulating layer is provided on at least one side of the first side plate portion away from the second beam body along the first direction.

6. The battery box according to claim 4, characterized in that: The second direction is the front-rear direction of the vehicle, and the thickness of the first beam body is greater than the thickness of the second beam body; The second beam body is provided with a slotted portion extending along a third direction, the third direction is arranged at an angle to the first direction and the second direction, and the first beam body is inserted into the slotted portion along the third direction.

7. The battery case according to any one of claims 1 to 6, characterized in that: It also includes a second connecting component, the second connecting component includes a second bottom plate portion, two second side plate portions and two wing plate portions, the second bottom plate portion is connected respectively by the two second side plate portions and the two wing plate portions, the second bottom plate portion is arranged on the upper part of the second beam body and fixedly connected to the second beam body, the large surface of the second bottom plate portion is parallel to the first surface of the second beam body, the second side plate portion and the second surface of the second beam body are arranged in parallel, the first surface and the second surface are arranged at a third angle, and the third angle is between 60° and 120°, the two wing plate portions are arranged on the upper part of the first beam body and fixedly connected to the first beam body, the wing plate portions are arranged parallel to the first surface, the size of the second beam body along the third direction is larger than that of the first beam body, the third direction and the first direction and the second direction are all arranged at a second angle, and the second angle is between 85° and 95°.

8. The battery box according to claim 6, characterized in that: The projection of the slot portion along the first direction is a rectangle, and the sum of the dimensions of the first beam body and the two first bottom plate portions in the second direction matches the dimension of the slot portion in the second direction.

9. The battery box according to claim 6, characterized in that: The slot portion includes a first slot section and a second slot section, the second slot section is closer to the slot opening of the slot portion than the first slot section, and the size of the second slot section in the second direction is larger than the size of the first slot section in the second direction; The size of the first beam in the second direction matches the size of the first slot section in the second direction, and the sum of the sizes of the second beam and the two first bottom plates in the second direction matches the size of the second slot section in the second direction.

10. The battery case according to any one of claims 1-6, 8 and 9, characterized in that: At least one of the first beam body and the second beam body is connected to the first connecting component by a combination of welding and connecting piece connection.

11. The battery case according to any one of claims 1 to 6, 8 and 9, characterized in that: The ratio of the size of the first connecting component in the third direction to the size of the first beam in the third direction is between 0.6 and 1, the third direction is arranged 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. A battery pack, characterized in that: It comprises a battery case and a plurality of batteries arranged inside the battery case, wherein the battery case is the battery case according to any one of claims 1 to 11.

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