Lower box body of battery pack

Abstract

The utility model provides a lower box body of a battery pack, and relates to the technical field of new energy battery devices. The battery pack lower box body comprises a frame body, a cross beam and a support are arranged in the frame body, and a battery module is located in the frame body. And in the length direction of the battery module, a gap is formed between the battery module and the cross beam. The support is fixedly connected with the cross beam, the support extends towards the battery module, and the extending part, facing the battery module, of the support supports the battery module and is fixedly connected with the battery module. According to the battery pack lower box body provided by the invention, the bracket is arranged on the cross beam, and the arranged bracket extends towards the battery module, so that in the length direction of the battery module, even if the distance is formed between the battery module and the cross beam, the support of the cross beam on the battery module is not influenced; the battery module can be supported by the part, extending towards the battery module, of the bracket, so that the battery module is indirectly supported and fixed by the cross beam, and the problem of mounting and fixing the battery module is solved.

Description

Technical Field

[0001] The present application belongs to the technical field of new energy battery devices, and specifically relates to a lower box of a battery pack. Background Art

[0002] As a key component of the battery pack structure, the battery pack lower box is responsible for carrying components such as battery modules, battery management system (BMS), cooling system, and electrical connectors, and ensuring that they are firmly installed in the battery pack lower box to prevent damage to the battery modules caused by vibration and impact during vehicle operation.

[0003] In the related art, the battery pack structure includes a lower box of the battery pack and a battery module. The lower box of the battery pack includes a frame and two beams arranged in the frame. The two beams are fixedly connected to the side walls of the frame in the width direction. The battery module is fixedly connected to the two beams by the end plates at both ends, so as to be stably arranged in the frame. However, in some cases, due to the influence of other components installed in the lower box of the battery pack, the beams in the frame cannot be fixed to the battery module, making it difficult to assemble the battery module. Utility Model Content

[0004] The purpose of the present application is to provide a lower box body for a battery pack, so as to solve the technical problem that the cross beam is affected by other components in the lower box body, the cross beam in the frame body cannot be fixed to the battery module, and the battery module is difficult to assemble.

[0005] The technical solutions of this application are as follows:

[0006] The present application provides a battery pack lower box, including a frame, a crossbeam and a bracket are arranged in the frame, and a battery module is located in the frame. In the length direction of the battery module, there is a spacing between the battery module and the crossbeam. The bracket is fixedly connected to the crossbeam, the bracket extends toward the battery module, and the extension portion of the bracket toward the battery module supports the battery module and is fixedly connected to the battery module.

[0007] With the battery pack lower box provided in the present application, a bracket is arranged on the cross beam, and the bracket extends toward the battery module. In this way, in the length direction of the battery module, even if there is a distance between the battery module and the cross beam, it does not affect the support of the battery module by the cross beam. The battery module can be supported by the part of the bracket extending toward the battery module, thereby realizing indirect support and fixation of the battery module by the cross beam, which solves the problem of installation and fixation of the battery module.

[0008] In a possible design, the bracket includes a first component, and the first component includes a first support plate and a first connecting plate connected to each other. The first support plate is used to support the battery module. The first connecting plate is located on one side of the first support plate, and the first connecting plate is fixedly connected to the first side of the beam, and the first side is located on the side of the beam away from the battery module.

[0009] The battery pack lower box provided by this embodiment includes a first component, the first component includes a first support plate and a first connecting plate, the first support plate and the first connecting plate are connected to each other, so that when the bracket is installed, the first support plate can be fixedly connected to the crossbeam through the first connecting plate, and the first support plate extends toward the battery module. When the battery module is installed, the first support plate extends to the part below the right end plate of the battery module and is fixedly connected to the right end plate of the battery module, so that it plays a role in supporting and fixing the battery module.

[0010] In a possible design, the first support plate is fixedly connected to the upper surface of the crossbeam.

[0011] The battery pack lower box provided by this embodiment fixes the first connecting plate to the cross beam, thereby reducing and dispersing the shear force at the connection between the first connecting plate and the cross beam, which helps to improve the reliability of the connection between the first component and the cross beam.

[0012] In a possible design, the bracket further includes a second component, the second component is located below the first support plate, and the second component is fixedly connected to the crossbeam.

[0013] The battery pack lower box provided by this embodiment has a second component arranged below the first support plate, the purpose of which is to prevent the first support plate from bending and deforming downward under the action of long-term pressure from the battery module, resulting in unstable support for the battery module.

[0014] In a possible design, the second component includes a second support plate and a second connecting plate connected to each other. The second support plate is located below the first support plate. The second connecting plate is located on a side of the second support plate close to the cross beam, and the second connecting plate is fixedly connected to a second side surface of the cross beam, and the second side surface is a side of the cross beam close to the battery module.

[0015] The second component of the battery pack lower box provided by this embodiment includes a second support plate and a second connecting plate, wherein the second support plate is located below the first support plate, that is, the second support plate is located on the side of the first support plate away from the battery module, so that when the first support plate is subjected to pressure from the battery module, the second support plate is located below the first support plate, which can play a role in transmitting pressure, reducing or preventing the first support plate from being deformed due to excessive pressure. In addition, the pressure can also be transmitted to the second side of the beam through the second connecting plate, which helps to balance the forces on both sides of the beam, and the beam has better reliability and is not easily damaged.

[0016] In a possible design, the second support plate contacts the first support plate and is fixedly connected.

[0017] Through the battery pack lower box provided in this embodiment, the second support plate is in contact with the first support plate and is fixedly connected, which helps the second support plate to quickly disperse the pressure of the first support plate and prevent the first support plate from bending and deforming under pressure.

[0018] In a possible design, the second component further includes a third support plate and a fourth support plate. The third support plate and the fourth support plate are connected to opposite sides of the second support plate, and the third support plate and the fourth support plate are bent relative to the second support plate away from the first support plate. The bracket further includes a third component, and the third support plate and the fourth support plate are fixedly connected to the crossbeam through the third component.

[0019] In the battery pack lower box provided by this embodiment, the third connecting plate and the fourth connecting plate are located on opposite sides of the second support plate, and the third support plate and the fourth support plate are fixedly connected to the crossbeam through the third component. In this way, when the second support plate is subjected to the pressure transmitted by the first support plate, the pressure will be quickly transmitted to the crossbeam through the third support plate and the fourth support plate, thereby reducing the occurrence of compression deformation of the second support plate and improving the reliability of the bracket structure itself.

[0020] In a possible design, the third component includes a third connecting plate and a fourth connecting plate. The third connecting plate includes a first connecting sub-plate and a second connecting sub-plate connected to each other, the first connecting sub-plate is fixedly connected to the third support plate, and the second connecting sub-plate is fixedly connected to the cross beam. The fourth connecting plate includes a third connecting sub-plate and a fourth connecting sub-plate of an integral structure, the third connecting sub-plate is fixedly connected to the fourth connecting plate, and the fourth connecting sub-plate is fixedly connected to the cross beam.

[0021] In the battery pack lower box provided by this embodiment, the third connecting plate includes a first connecting sub-plate and a second connecting sub-plate that are connected to each other, and the first connecting sub-plate is fixedly connected to the third support plate, and the second connecting sub-plate is fixedly connected to the crossbeam. In this way, when the second support plate is subjected to pressure, the pressure is transmitted to the crossbeam in sequence through the third support plate, the first connecting sub-plate, and the second connecting sub-plate, thus dispersing the pressure on the second support plate. Similarly, the structural characteristics and functions of the fourth connecting plate are the same as those of the third connecting plate.

[0022] In a possible design, the third support plate and the fourth support plate are fixedly connected to the second side surface of the crossbeam via the third component.

[0023] Through the battery pack lower box provided by this embodiment, the second support plate is fixedly connected to the second side of the beam through the second connecting plate. Here, the third support plate and the fourth support plate are fixedly connected to the second side of the beam through the third component. Then, overall, the second support plate is fixedly connected to the second side of the beam through the first connecting plate and the third component, respectively. In this way, on the one hand, it helps to decompose the force of the second support plate, so that the force of the second support plate can be transmitted to the second side through the second connecting plate and the third component, respectively. On the other hand, the second support plate is fixedly connected to the second side of the beam through the first connecting plate and the third component, which also helps to improve the overall strength of the second support plate, and the support is more reliable.

[0024] In a possible design, at least one of the first component, the second component, and the third component is a sheet metal part.

[0025] The advantage of at least one of the first component, the second component and the third component of the battery pack lower box provided by this embodiment being a sheet metal part is that sheet metal parts are generally made of steel, have good strength, are relatively easy to process and are highly efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 Shown is a schematic diagram of the structure of the lower box of the battery pack provided in an embodiment of the present application.

[0027] Figure 2 Shown using Figure 1 A schematic diagram of the partial structural composition of the battery pack lower box of the battery pack is shown.

[0028] Figure 3 for Figure 2 BB cross-sectional view.

[0029] Figure 4 for Figure 3 Enlarged view of point I in the middle.

[0030] Figure 5 for Figure 2 The battery pack structure shown is a simplified structural diagram after omitting the cold plate connecting pipeline.

[0031] Figure 6 for Figure 1 Enlarged schematic diagram of point F in the middle.

[0032] Figure 7 The figure shows a schematic diagram of the three-dimensional structure of the bracket in the lower box provided in an embodiment of the present application at a certain viewing angle.

[0033] Figure 8 Shown is a schematic diagram of the three-dimensional structure of the bracket in the lower box provided in an embodiment of the present application from another perspective.

[0034] Fig. 9 Shown is a schematic diagram of the structural decomposition of the bracket in the lower box provided in an embodiment of the present application.

[0035] The accompanying drawings are denoted as follows:

[0036] A. Battery pack lower box; 1. Frame; 11. Crossbeam; 111. First side; 112. Upper surface; 113. Second side; 12. Bracket; 12A. First component; 12A1. First support plate; 12A2. Second support plate; 12B. Second component; 12B1. Second support plate; 12B2. Second connecting plate; 12B3. Third support plate; 12B4. Fourth support plate; 12C. Third component; 12C1. Third connecting plate; 12C11. First connecting sub-plate; 12C12. Second connecting sub-plate; 12C2. Fourth connecting plate; 12C21. Third connecting sub-plate; 12C22. Fourth connecting sub-plate; B. Battery module; B1. End plate; C. Cold plate; H. Cold plate connecting pipeline; D. Rivet; E. Nut; F. Bolt hole; G. Bolt. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0038] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of the application are only for the purpose of describing specific embodiments and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims and the accompanying drawings of this application are intended to cover non-exclusive inclusions.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase "embodiments" in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] The term "and / or" in this article is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can mean: A exists, A and B exist at the same time, and B exists. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] The directional words appearing in the following description are all directions shown in the drawings, and do not limit the specific structure of the lower box of the battery pack of this application. For example, in the description of this application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the drawings, which are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application.

[0042] In addition, the terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order, and may explicitly or implicitly include one or more of the features.

[0043] In the description of the present application, unless otherwise specified, "plurality" means more than two (including two), and similarly, "multiple groups" means more than two groups (including two).

[0044] In the description of the present application, 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, the "connection" or "connection" of a mechanical structure may refer to a physical connection. For example, the physical connection may be a fixed connection, such as a fixed connection through a barrier member, such as a fixed connection through screws, bolts or other barrier members. The physical connection may also be a detachable connection, such as a mutual snap-on or snap-fit ​​connection. The physical connection may also be an integral connection, such as a connection formed by welding, bonding or integral molding. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to specific circumstances.

[0045] Figure 1 The figure is a schematic diagram of the structure of the lower box of the battery pack provided in the embodiment of the present application. Figure 2 Shown using Figure 1 The schematic diagram of the partial structure of the battery pack of the battery pack lower box shown in the figure, Figure 3 for Figure 2 BB cross-sectional view, Figure 4 for Figure 2The enlarged view of point I in the middle, Figure 5 for Figure 2 The battery pack structure shown is a simplified structural diagram after omitting the cold plate connecting pipeline.

[0046] Please refer to Figures 1 to 5 The lower box A of the battery pack includes a frame 1. The frame 1 is provided with a crossbeam 11 and a bracket 12, and the battery module B is located in the frame 1. In the length direction of the battery module B, there is a gap between the battery module B and the crossbeam 11. The bracket 12 is fixedly connected to the crossbeam 11, and the bracket 12 extends toward the battery module B. The extension portion of the bracket 12 toward the battery module B supports the battery module B and is fixedly connected to the battery module B.

[0047] Please continue to refer to Figures 1 to 5 Generally speaking, the frame 1 is not only used to fix and install the battery module B, but also used to install components such as the battery management system (BMS), cooling system, and electrical connectors. Figure 1 From the current perspective, there are two beams 11 in the frame 1, one of which is close to the left side frame of the frame 1, and the other is close to the right side frame of the frame 1. The area between the left beam 11 and the right beam 11 is used to install the battery module B, and the area between the right beam 11 and the right side frame of the frame 1 is used to install components such as the battery management system (BMS), cooling system, and electrical connectors.

[0048] In some cases, the crossbeam 11 may be affected by certain components and deviate from the battery module B, so that the battery module B cannot overlap with the crossbeam 11 and thus be fixedly connected.

[0049] Please continue to refer to Figures 2 to 5 For example, in some embodiments of the present application, in order to better control the temperature of the battery module B, cold plates C will be set on both sides of the width direction of the battery module B, and the cold plates C will cover the entire length direction of the battery module B. Since the cold plates C are set in the entire length direction of the battery module B, the cold plate connecting pipe H is also set at the right end of the battery module B, so that the right side beam 11 needs to avoid the cold plate C and part of the cold plate connecting pipe H before it can be fixedly connected to the frame 1. In this way, there is a distance between the battery module and the right side beam, and they cannot be directly overlapped. Therefore, the right side beam cannot support the battery module B, which makes it difficult to install the battery module B.

[0050] The battery pack lower box A provided in the present application has a bracket 12 on the cross beam 11, and the bracket 12 extends toward the battery module B. In this way, in the length direction of the battery module B, even if there is a distance between the battery module B and the cross beam 11, the support of the battery module B by the cross beam 11 is not affected. The part of the bracket 12 extending toward the battery module B can be used to support the battery module B, thereby realizing indirect support and fixation of the battery module B by the cross beam 11, solving the installation and fixation problem of the battery module B.

[0051] Figure 6 for Figure 1 Enlarged schematic diagram of point F in the middle. Figure 7 Shown is a schematic diagram of the three-dimensional structure of the bracket in the lower box provided in an embodiment of the present application. Figure 8 Shown is a schematic diagram of the three-dimensional structure of the bracket in the lower box provided in an embodiment of the present application from another perspective.

[0052] Please combine Figure 6 , Figure 7 up Figure 8 In some embodiments of the present application, the bracket 12 includes a first component 12A, and the first component 12A includes a first support plate 12A1 and a first connecting plate 12A2 connected to each other. The first support plate 12A1 is used to support the battery module B. The first connecting plate 12A2 is located on one side of the first support plate 12A1, and the first connecting plate 12A2 is fixedly connected to the first side surface 111 of the beam 11, and the first side surface 111 is located on the side of the beam 11 away from the battery module B.

[0053] Specifically, please combine Figures 2 to 8 In some embodiments of the present application, the bracket 12 includes a first component 12A, and the first component 12A includes a first support plate 12A1 and a first connecting plate 12A2. The first support plate 12A1 and the first connecting plate 12A2 are connected to each other. In this way, when the bracket 12 is installed, the first support plate 12A1 can be fixedly connected to the crossbeam 11 through the first connecting plate 12A2, and the first support plate 12A1 extends toward the battery module B. When the battery module B is installed, the first support plate 12A1 extends to the portion below the right end plate B1 of the battery module B and is fixedly connected to the right end plate B1 of the battery module B, so that the battery module B is supported and fixed.

[0054] Please combine Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7In some embodiments of the present application, the first connecting plate 12A2 and the beam 11 are fixed at the first side surface 111 of the beam 11. The first side surface 111 is the side of the beam 11 away from the battery module B. In this way, when the first support plate 12A1 is subjected to the pressure of the battery module B, the upper surface 112 and the first side surface 111 of the beam 11 will be affected by the pressure. Therefore, the pressure will be dispersed on the upper surface 112 and the first side surface 111, and the beam 11 is not easily damaged, and the support for the battery module B is more stable. Among them, the upper surface 112 of the beam 11 is the side of the beam 11 away from the bottom of the frame 1, and is the main support surface of the beam 11.

[0055] Please combine Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments of the present application, the first support plate 12A1 and the first connecting plate 12A2 are connected to each other, which means that the first support plate 12A1 and the first connecting plate 12A2 are an integral structure, such as the first support plate 12A1 and the first connecting plate 12A2 are an integrally manufactured sheet metal part or an integrally manufactured casting. In other embodiments of the present application, the first support plate 12A1 and the first connecting plate 12A2 can also be connected by welding or by fixing parts such as bolts, and the present application does not limit this.

[0056] Please continue to refer to Figure 2 , Figure 4 , Figure 5 , Figure 6 and Figure 7 In some embodiments of the present application, the first connecting plate 12A2 and the crossbeam 11 may be fixedly connected by rivets D, or by other connection methods, such as resistance welding or bolted connection. Riveting is more convenient to operate and implement than other connection methods.

[0057] Please combine Figure 2 , Figure 4 , Figure 5 and Figure 6 In some embodiments of the present application, the first support plate 12A1 is fixedly connected to the upper surface 112 of the beam 11 .

[0058] Specifically, as mentioned above, the first support plate 12A1 is fixedly connected to the crossbeam 11 through the first connecting plate 12A2, and the fixing position of the first connecting plate 12A2 and the crossbeam 11 is located on the side of the crossbeam 11 away from the battery module B. In this way, when the first support plate 12A1 is subjected to pressure, the connection between the first connecting plate 12A2 and the crossbeam 11 will be subjected to a relatively strong shear force. In the present application, by fixing the first connecting plate 12A2 and the crossbeam 11, it is convenient to reduce and disperse the shear force at the connection between the first connecting plate 12A2 and the crossbeam 11, which helps to improve the reliability of the connection between the first component 12A and the crossbeam 11.

[0059] Please continue to refer to Figure 2 , Figure 4 , Figure 5 and Figure 6 , similar to the fixing method of the first connecting plate 12A2, in the present application, the fixing connection method between the first supporting plate 12A1 and the crossbeam 11 can also be riveted by rivets D, or other connection methods, such as resistance welding or bolt fixing connection. Riveting is convenient to operate and easy to implement compared to other connection methods.

[0060] Fig. 9 The figure shows a schematic diagram of the structure of the bracket in the lower box provided in the embodiment of the present application. Figures 2 to 9 In some embodiments of the present application, the bracket 12 further includes a second component 12B, the second component 12B is located below the first support plate 12A1, and the second component 12B is fixedly connected to the beam 11.

[0061] Specifically, in some embodiments of the present application, a second component 12B is provided below the first support plate 12A1, the purpose of which is to reduce or prevent the first support plate 12A1 from bending and deforming downward under the action of long-term pressure from the battery module B, resulting in unstable support for the battery module B.

[0062] Specifically, in some embodiments of the present application, the second component 12B can be fixed by means of the crossbeam 11. In this way, when the second component 12B is subjected to the pressure transmitted by the first support plate 12A1, the pressure can be transmitted to the crossbeam 11 through the second component 12B, which helps to disperse the pressure on the first support plate 12A1 and prevent the first support plate 12A1 from bending and deforming. In addition, the second component 12B is fixed by means of the existing crossbeam 11, which has the characteristics of simple structure.

[0063] Please continue to refer to Figures 6 to 9In some embodiments of the present application, the second component 12B includes a second support plate 12B1 and a second connecting plate 12B2 connected to each other. The second support plate 12B1 is located below the first support plate 12A1. The second connecting plate 12B2 is located on a side of the second support plate 12B1 close to the beam 11, and the second connecting plate 12B2 is fixedly connected to the second side surface 113 of the beam 11, and the second side surface 113 is a side of the beam 11 close to the battery module B.

[0064] Specifically, in some embodiments of the present application, the second component 12B includes a second support plate 12B1 and a second connecting plate 12B2, wherein the second support plate 12B1 is located below the first support plate 12A1, that is, the second support plate 12B1 is located on the side of the first support plate 12A1 away from the battery module B. In this way, when the first support plate 12A1 is subjected to pressure from the battery module B, the second support plate 12B1 is located below the first support plate 12A1, which can play a role in transmitting pressure, thereby reducing or preventing the first support plate 12A1 from being deformed due to excessive pressure.

[0065] The second connecting plate 12B2 is connected to the second supporting plate 12B1. The second connecting plate 12B2 is located on a side of the second supporting plate 12B1 close to the beam 11. The second connecting plate 12B2 is fixedly connected to the second side surface 113 of the beam 11. In this way, when the second supporting plate 12B1 is subjected to pressure, the pressure will be transmitted to the second side surface 113 of the beam 11 through the second connecting plate 12B2.

[0066] As mentioned above, the first support plate 12A1 is connected to the first connecting plate 12A2, and the first connecting plate 12A2 is fixedly connected to the first side surface 111 of the beam 11, and the first side surface 111 is the side of the beam 11 away from the battery module B. Here, the second connecting plate 12B2 is connected to the second support plate 12B1, and the second connecting plate 12B2 is fixedly connected to the second side surface 113 of the beam 11, and the second side surface 113 is the side of the beam 11 close to the battery module B. In this way, the pressure on the first support plate 12A1 can be at least transmitted to the first side surface 111 of the beam 11 through the first connecting plate 12A2, and at the same time transmitted to the second side surface 113 of the beam 11 through the second connecting plate 12B2. In addition, since the first side surface 111 and the second side surface 113 are located on opposite sides of the beam 11, this helps to balance the forces on both sides of the beam 11, and the reliability of the beam 11 is better and it is not easy to be damaged.

[0067] Please continue to refer to Figures 6 to 9, similar to the connection between the first support plate 12A1 and the crossbeam, the second support plate 12B1 and the second connecting plate 12B2 are connected to each other means that the second support plate 12B1 and the second connecting plate 12B2 are an integral structure, such as the second support plate 12B1 and the second connecting plate 12B2 are an integrally manufactured sheet metal part or an integrally manufactured casting. In other embodiments of the present application, the second support plate 12B1 and the second connecting plate 12B2 are connected to each other means that the second support plate 12B1 and the second connecting plate 12B2 can be welded or other fixing parts such as bolts to fix the connection, and the present application does not limit this.

[0068] Please continue to refer to Figures 6 to 9 In some embodiments of the present application, the second support plate 12B1 is in contact with the first support plate 12A1 and is fixedly connected.

[0069] Specifically, the second support plate 12B1 is in contact with the first support plate 12A1 and is fixedly connected, which helps the second support plate 12B1 to quickly disperse the pressure of the first support plate 12A1 and reduce or prevent the first support plate 12A1 from bending and deforming under pressure.

[0070] In some cases, the connection between the second support plate 12B1 and the first support plate 12A1 can be achieved by resistance welding. Of course, other fixed connection methods, such as bolt connection, lock connection, etc., are not excluded.

[0071] Please combine Figures 2 to 9 As mentioned above, in some embodiments of the present application, the bracket 12 is fixedly connected to the end plate B1 of the battery module B by a fixing member such as a bolt. A specific implementation method is to set a bolt hole F on the first support plate 12A1 and the second support plate 12B1 of the bracket 12, and weld a nut E at the bottom of the second support plate 12B1. In this way, when the end plate B1 of the battery module B is fixedly connected to the bracket 12, a bolt G can be set on the side of the end plate B1 of the battery module B, and the bolt G passes through the end plate B1, the first support plate 12A1 and the second support plate 12B1 in sequence and is tightened with the nut E at the bottom of the second support plate 12B1, so as to play the role of fixing the battery module B to the bracket 12.

[0072] In this embodiment, the nut E welded to the bottom plate of the second support plate 12B1 can, to a certain extent, prevent the nut E from loosening, the bolt fixing from failing, and the battery module B from being unstable.

[0073] Please continue to refer to Figures 6 to 9In some embodiments of the present application, the second component 12B further includes a third support plate 12B3 and a fourth support plate 12B4. The third support plate 12B3 and the fourth support plate 12B4 are connected to opposite sides of the second support plate 12B1, and the third support plate 12B3 and the fourth support plate 12B4 are bent relative to the second support plate 12B1 away from the first support plate 12A1. The bracket 12 further includes a third component 12C, and the third support plate 12B3 and the fourth support plate 12B4 are fixedly connected to the crossbeam 11 through the third component 12C.

[0074] Specifically, in some embodiments of the present application, the third connecting plate 12C1 and the fourth connecting plate 12C2 are located on opposite sides of the second support plate 12B1, and the third support plate 12B3 and the fourth support plate 12B4 are fixedly connected to the crossbeam 11 through the third component 12C. In this way, when the second support plate 12B1 is subjected to the pressure transmitted by the first support plate 12A1, the pressure will be quickly transmitted to the crossbeam 11 through the third support plate 12B3 and the fourth support plate 12B4, thereby reducing the occurrence of compression deformation of the second support plate 12B1 and improving the reliability of the bracket 12 structure itself.

[0075] In some embodiments of the present application, the third support plate 12B3 and the fourth support plate 12B4 are connected to opposite sides of the second support plate 12B1, which means that the third support plate 12B3, the fourth support plate 12B4 and the second support plate 12B1 can be an integral structure, such as the first support plate 12A1 and the first connecting plate 12A2 are sheet metal parts of an integral structure or a casting of an integral structure.

[0076] In some other embodiments of the present application, the connection between the third support plate 12B3 and the second support plate 12B1, or between the fourth support plate 12B4 and the second support plate 12B1, may also be welded or connected using other fixing members such as bolts, and the present application does not impose any limitation on this.

[0077] Please continue to refer to Figures 6 to 9 In some embodiments of the present application, the third component 12C includes a third connecting plate 12C1 and a fourth connecting plate 12C2. The third connecting plate 12C1 includes a first connecting sub-plate 12C11 and a second connecting sub-plate 12C12 connected to each other, the first connecting sub-plate 12C11 is fixedly connected to the third support plate 12B3, and the second connecting sub-plate 12C12 is fixedly connected to the crossbeam 11. The fourth connecting plate 12C2 includes a third connecting sub-plate 12C21 and a fourth connecting sub-plate 12C22 of an integral structure, the third connecting sub-plate 12C21 is fixedly connected to the fourth support plate 12B4, and the fourth connecting sub-plate 12C22 is fixedly connected to the crossbeam 11.

[0078] Please continue to refer to Figures 6 to 9The third connection plate 12C1 includes a first connection sub-plate 12C11 and a second connection sub-plate 12C12 connected to each other, and the first connection sub-plate 12C11 is fixedly connected to the third support plate 12B3, and the second connection sub-plate 12C12 is fixedly connected to the cross beam 11. In this way, when the second support plate 12B1 is subjected to pressure, the pressure is sequentially transmitted to the cross beam 11 through the third support plate 12B3, the first connection sub-plate 12C11, and the second connection sub-plate 12C12, so that the pressure on the second support plate 12B1 is dispersed.

[0079] Please continue to refer to Fig. 9 In some embodiments of the present application, the first connecting sub-plate 12C11 and the third supporting plate 12B3 have approximately the same shape, the first connecting sub-plate 12C11 and the third supporting plate 12B3 fit together, and the first connecting sub-plate 12C11 and the third supporting plate 12B3 are fixedly connected, so that there is a large contact surface between the third supporting plate 12B3 and the first connecting sub-plate 12C11, which is conducive to the dispersed transmission of force. In addition, the second connecting sub-plate 12C12 and the first connecting sub-plate 12C11 are approximately perpendicular to each other, so that the second connecting sub-plate 12C12 can fit together with the second side surface 113 of the beam 11, so that when the force of the third supporting plate 12B3 can be transferred to the beam 11 through the first connecting sub-plate 12C11 and the second connecting sub-plate 12C12, the force of the beam 11 is relatively mild.

[0080] Please continue to refer to Fig. 9 In some embodiments of the present application, the structure of the fourth connecting plate 12C2 is the same as that of the third connecting plate 12C1. The fourth connecting plate 12C2 and the third connecting plate 12C1 are symmetrically arranged on both sides of the second support plate 12B1, which plays a role in symmetrically decomposing the force on the second support plate 12B1, and helps to maintain the force balance of the second support plate 12B1 and the beam 11.

[0081] It should be noted that Fig. 9 Only one implementation of the third component 12C is given, but the structure of the third component 12C is not limited to Fig. 9 As shown, for example, the third connecting plate 12C1 can be approximately a straight plate, which is fixedly arranged between the third support plate 12B3 and the cross beam 11. The straight plate, the third support plate 12B3 and the cross beam 11 form a structure similar to a tripod, which can also play a role in decomposing the force of the second support plate 12B2. There are many other structures like this, and this application does not limit this.

[0082] Please combine Figures 6 to 9 In some embodiments of the present application, the third support plate 12B3 and the fourth support plate 12B4 are fixedly connected to the second side surface 113 of the beam 11 through the third component 12C.

[0083] Please continue to refer to Figures 6 to 9 Specifically, as mentioned above, the second support plate 12B1 is fixedly connected to the second side surface 113 of the beam 11 through the second connecting plate 12B2, and here, the third support plate 12B3 and the fourth support plate 12B4 are fixedly connected to the second side surface 113 of the beam 11 through the third component 12C.

[0084] Then, in general, the second support plate 12B1 is fixedly connected to the second side surface 113 of the beam 11 through the first connecting plate 12A2 and the third component 12C, which, on the one hand, helps to decompose the force of the second support plate 12B1, so that the force of the second support plate 12B1 can be transmitted to the second side surface 113 through the second connecting plate 12B2 and the third component 12C. On the other hand, the second support plate 12B1 is fixedly connected to the second side surface 113 of the beam 11 through the first connecting plate 12A2 and the third component 12C, which also helps to improve the overall strength of the second support plate 12B1, and the support is more reliable.

[0085] It should also be noted that, as mentioned above, the first connecting plate 12A2 of the first component 12A is fixedly connected to the first side surface 111 of the beam 11, and here, the second component 12B is fixedly connected to the second side surface 113 of the beam 11. This helps to balance the forces on both sides of the beam 11 and reduce damage to the beam 11 caused by unbalanced forces.

[0086] Please continue to refer to Figures 6 to 9 In some embodiments of the present application, at least one of the first component 12A, the second component 12B and the third component 12C is a sheet metal part.

[0087] Specifically, the advantage of the first component 12A, the second component 12B, and the third component 12C being sheet metal parts is that sheet metal parts are generally made of steel, have good strength, and are relatively easy to process with high efficiency.

[0088] It should be noted that the first component 12A, the second component 12B, and the third component 12C may also be made of other materials and processes, such as casting, welding, etc., as long as the strength can meet the requirements.

[0089] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, the combination of features of different embodiments is meant to be within the scope of the present application and form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0090] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A battery pack lower box, characterized in that: It comprises a frame, in which a crossbeam and a bracket are arranged; The battery module is located in the frame; in the length direction of the battery module, there is a distance between the battery module and the crossbeam; The bracket is fixedly connected to the crossbeam, and the bracket extends toward the battery module. The extending portion of the bracket toward the battery module supports the battery module and is fixedly connected to the battery module.

2. The battery pack lower box according to claim 1, characterized in that: The bracket includes a first component, and the first component includes a first supporting plate and a first connecting plate connected to each other; The first supporting plate is used to support the battery module; The first connecting plate is located on one side of the first supporting plate, and the first connecting plate is fixedly connected to a first side surface of the crossbeam, and the first side surface is located on a side of the crossbeam away from the battery module.

3. The battery pack lower box according to claim 2, characterized in that: The first supporting plate is fixedly connected to the upper surface of the crossbeam.

4. The battery pack lower box according to claim 2 or 3, characterized in that: The bracket also includes a second component, which is located below the first support plate and is fixedly connected to the crossbeam.

5. The battery pack lower box according to claim 4, characterized in that: The second component includes a second supporting plate and a second connecting plate connected to each other; The second supporting plate is located below the first supporting plate; The second connecting plate is located on a side of the second supporting plate close to the crossbeam, and the second connecting plate is fixedly connected to a second side surface of the crossbeam, where the second side surface is a side of the crossbeam close to the battery module.

6. The battery pack lower box according to claim 5, characterized in that: The second supporting plate is in contact with the first supporting plate and is fixedly connected thereto.

7. The battery pack lower box according to claim 5, characterized in that: The second component also includes a third support plate and a fourth support plate; The third support plate and the fourth support plate are connected to opposite sides of the second support plate, and the third support plate and the fourth support plate are bent relative to the second support plate and away from the first support plate; The bracket also includes a third component, and the third support plate and the fourth support plate are fixedly connected to the crossbeam via the third component.

8. The battery pack lower box according to claim 7, characterized in that: The third component includes a third connecting plate and a fourth connecting plate; The third connecting plate comprises a first connecting sub-plate and a second connecting sub-plate connected to each other, the first connecting sub-plate is fixedly connected to the third supporting plate, and the second connecting sub-plate is fixedly connected to the crossbeam; The fourth connecting plate includes a third connecting sub-plate and a fourth connecting sub-plate of an integral structure. The third connecting sub-plate is fixedly connected to the fourth supporting plate, and the fourth connecting sub-plate is fixedly connected to the crossbeam.

9. The battery pack lower box according to claim 7, characterized in that: The third support plate and the fourth support plate are fixedly connected to the second side surface of the crossbeam through the third component.

10. The battery pack lower box according to claim 7, characterized in that: At least one of the first component, the second component and the third component is a sheet metal part.

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