Battery box

Abstract

The utility model discloses a battery box which comprises a box body, a first plate, a second plate, a connecting plate and a first weldment, wherein the first plate is attached to the side wall of the box body; the connecting plate comprises a first straight edge and a second straight edge which are opposite, the first plate is connected with the first straight edge, and the second plate is connected with the second straight edge; the connecting plate further comprises a working face and an appearance face which are opposite, the working face is connected with the first straight edge and the second straight edge, the appearance face is connected with the first straight edge and the second straight edge, the normal direction of any point on the appearance face faces the included angle formed by the first plate and the second plate, and a weld joint is formed between the working face and the box body in a spaced mode. The first weldment is arranged in the welding seam and connected with the working face and the box body. According to the battery box, the weld joint is reserved between the box body and the working surface of the connecting plate, and the first weldment is arranged in the weld joint, so that the first weldment is effectively protected from interference and impact of external parts.

Description

Technical Field

[0001] This utility model relates to the field of energy storage equipment technology, and in particular to a battery box. Background Technology

[0002] With the development of integrated energy storage devices, in order to meet the demand for large-capacity and high-performance energy storage, it is usually necessary to connect multiple battery boxes through electrical connections to form a complete energy storage system, so as to meet the needs of new energy vehicles, engineering power vehicles and other high-power application scenarios.

[0003] Accordingly, to enable rapid installation and removal of the battery box, it typically includes a box body and a mounting bracket welded to its bottom, which is used to connect to the support frame. The mounting bracket not only reliably secures the battery box to the support frame but also facilitates assembly and maintenance, improving overall installation efficiency.

[0004] However, for stable load-bearing capacity, the mounting bracket is usually welded to the battery box. Because the weld itself has a certain volume, it creates weld excess, resulting in a protrusion on the mounting surface. During battery box installation and use, the welded area is prone to interference with the support bracket or other components, posing a risk of wear and affecting the battery box's safety and lifespan. Utility Model Content

[0005] One objective of this utility model is to provide a battery box that addresses the technical problem of weld excess in the weld seams of the battery box, which makes it prone to scratch damage.

[0006] To achieve the above objectives, the present invention provides a solution as follows: a battery box, comprising a box body, a first plate, a second plate, a connecting plate, and a first weldment; the first plate is attached to the side wall of the box body; the connecting plate includes a first straight edge and a second straight edge opposite to each other, the first plate being connected to the first straight edge, and the second plate being connected to the second straight edge; the connecting plate also includes a working surface and an outer surface opposite to each other, the working surface being connected to the first straight edge and the second straight edge respectively, the outer surface being connected to the first straight edge and the second straight edge respectively, the normal of any point on the outer surface being directed towards the angle formed by the first plate and the second plate, and a weld is formed between the working surface and the box body at intervals; the first weldment is disposed in the weld and is connected to the working surface and the box body respectively.

[0007] According to one embodiment of the present invention, the first weldment completely fills the weld seam.

[0008] According to one embodiment of the present invention, the first plate is located above the space of the second plate.

[0009] According to one embodiment of the present invention, the side of the second plate away from the first plate is coplanar with the bottom surface of the box.

[0010] According to one embodiment of the present invention, the battery box further includes a second welded component, which is connected between the first plate and the side wall of the box body.

[0011] According to one embodiment of the present invention, a plurality of through grooves are provided on the first plate, and the second weldment is connected to the box body along the edge of the through groove.

[0012] According to one embodiment of the present invention, the connecting plate is an arc-shaped plate, and the working surface at the first straight edge is parallel to the first plate; and / or, the working surface at the second straight edge is parallel to the second plate.

[0013] According to one embodiment of the present invention, two points are randomly selected on the working surface to form tangent planes. The two tangent planes intersect the working surface to obtain a tangent line, and the two tangent lines are parallel to each other.

[0014] According to one embodiment of the present invention, the battery box further includes reinforcing ribs, which are connected to the first plate, the second plate and the outer surface.

[0015] According to one embodiment of the present invention, the first straight edge is parallel to the second straight edge; and / or, the first plate and the second plate are perpendicular to each other.

[0016] According to one embodiment of the present invention, a plurality of mounting holes are provided on the second plate for connecting with the support bracket.

[0017] The beneficial effects of this utility model are as follows:

[0018] The battery box includes a box body, a first plate, a second plate, and a connecting plate that are connected to each other, and a first weldment connecting the two: the first plate is attached to the side wall of the box body; the connecting plate includes a working surface and an outer surface that are opposite each other, and a weld is formed between the working surface and the box body; the first weldment is disposed in the weld and is connected to the working surface and the box body respectively.

[0019] The battery box of this application features a pre-existing weld between the working surfaces of the box body and the connecting plate, with a first weldment placed within the weld. This design prevents the first weldment from protruding beyond the working surfaces of the box body and the connecting plate, effectively protecting it from interference and impact from external components. In actual use, because the first weldment is fully covered by the weld, it is not exposed to the external environment, significantly reducing the risk of wear from external components. Compared to existing technologies, this design significantly improves the wear resistance of the welded structure, enhances the reliability of the connection area, and extends the overall service life of the battery box. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the overall structure of the battery box provided in this embodiment of the utility model;

[0022] Figure 2 It is along Figure 1 A partial cross-sectional view of line AA in the middle section;

[0023] Figure 3 This is a schematic diagram of the structure of the first plate, the second plate, and the connecting plate provided in an embodiment of this utility model;

[0024] Figure 4 It is along Figure 3 A cross-sectional view of the BB line.

[0025] Explanation of icon numbers:

[0026] 10. First plate; 20. Second plate; 21. Mounting hole; 30. Connecting plate; 31. First straight edge; 32. Second straight edge; 33. Working surface; 34. Appearance surface; 40. Reinforcing rib; 50. Box body; 60. First weldment; 70. Second weldment. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] As the performance requirements for energy storage devices in applications such as new energy vehicles and engineering power vehicles continue to increase, energy storage devices are gradually trending towards integration. This typically requires multiple battery boxes to be electrically connected to form a complete energy storage system to meet the needs of high-power, high-capacity applications. Specifically, to facilitate rapid installation and disassembly of the battery boxes, existing battery box structures generally include a box body and a mounting bracket located at the bottom of the box body. The mounting bracket is fixed to the box body by welding and is used to connect to a support frame. This structure not only ensures reliable fixation between the battery box and the support frame but also improves the assembly efficiency and ease of subsequent maintenance.

[0029] However, due to the characteristics of the welding process, the weld itself has a certain volume, and after welding, it will form a weld reinforcement on the mounting surface, causing local bulges. In actual installation and use, this bulging weld area is prone to interference with the support frame or other external structures, posing a risk of wear and tear, which in turn affects the safety and service life of the battery box structure.

[0030] Please see Figures 1 to 4 As shown, Figure 1 This is a schematic diagram of the overall structure of the battery box provided in this embodiment of the utility model; Figure 2 It is along Figure 1 Schematic diagram of the cross section of line AA in the middle; Figure 3 This is a schematic diagram of the structure of the first plate, the second plate, and the connecting plate provided in an embodiment of this utility model; Figure 4 It is along Figure 3 A cross-sectional view of the BB line.

[0031] To solve the above-mentioned technical problems, this utility model discloses a battery box, which includes a box body 50, a first plate 10, a second plate 20, a connecting plate 30, and a first welded component 60. The first plate 10 is attached to the side wall of the box body 50. The connecting plate 30 includes a first straight edge 31 and a second straight edge 32, with the first plate 10 connected to the first straight edge 31 and the second plate 20 connected to the second straight edge 32. The connecting plate 30 also includes a working surface 33 and an outer surface 34, with the working surface 33 connected to the first straight edge 31 and the second straight edge 32, and the outer surface 34 connected to the first straight edge 31 and the second straight edge 32. The normal of any point on the outer surface 34 is directed towards the angle formed by the first plate 10 and the second plate 20. A weld is formed between the working surface 33 and the box body 50 at intervals. The first welded component 60 is disposed in the weld and is connected to the working surface 33 and the box body 50 respectively.

[0032] In this embodiment, the normal of any point on the outer surface 34 is directed toward the angle formed by the first plate 10 and the second plate 20. That is, the first plate 10 and the second plate 20 are extended to form a virtual angle, and the outer surface 34 is completely contained within the virtual angle, with a gap between it and the virtual angle. In other words, the first plate 10 and the first straight edge 31 are in contact with the side wall of the housing 50, while the connecting plate 30 gradually becomes spaced from the side wall of the housing 50 as it moves away from the first straight edge 31. The gap between the entire outer surface 34 and the side wall of the housing 50 is the weld seam in this embodiment, and the first weldment 60 is at least partially contained within the weld seam.

[0033] Because the first weldment 60 is embedded in the weld formed between the connecting plate 30 and the housing 50, the weld reinforcement height of the first weldment 60 is reduced after welding, and it may not even protrude beyond the outer side of the working surface 33 of the housing 50 and the connecting plate 30. Compared with the case of protruding weld reinforcement in traditional structures, the weld structure of this embodiment effectively protects the first weldment 60, preventing it from being directly exposed to the external environment. This significantly reduces the possibility of the first weldment 60 being subjected to external mechanical interference and impact wear, and extends the service life of the welded structure and even the entire battery box.

[0034] Furthermore, in practical applications, the battery box needs to be connected to the support frame or other mounting structures via a mounting bracket, i.e., the entire assembly formed by the first plate 10, the second plate 20, and the connecting plate 30 in this embodiment. Repeated installation and disassembly, as well as vibrations during operation, can cause wear on the protruding welded structure. This not only damages the welded structure itself but also affects the stability of battery operation. In this embodiment, the first welded component 60 is at least partially recessed within the weld seam after welding. When the weld reinforcement is worn away, the remaining first welded component 60 still retains its connecting function, and at this time, the battery box and the support frame are stably connected via the second plate 20.

[0035] It should be noted that in the field of materials processing, a weld seam usually refers to the connected entity formed after the molten metal in the weld pool cools. However, in this application, for clarity, the space between the connecting plate 30 and the housing 50 used to accommodate the brazing filler metal is defined as a weld seam. In this embodiment, the entity formed after the molten metal in the weld seam solidifies is defined as the first weldment 60. Similarly, the second weldment 70 appearing in subsequent embodiments also refers to the entity formed after the corresponding molten metal solidifies, rather than the base material. It should be understood that the interpretation of the weld seam as a space for accommodating the brazing filler metal is also a preferred example. That is, filling the weld seam between the working surface 33 and the housing 50 with brazing filler metal during welding can achieve a welded connection with almost no change in the shape of the connecting plate 30 and the housing 50. However, this does not preclude the possibility of using other welding connection methods in this application to allow the base material to flow and fill the weld seam. It should not be used to limit the scope of protection of this application to brazing production and processing only.

[0036] Furthermore, the first weldment 60 completely fills the weld seam.

[0037] As mentioned earlier, in practical applications, the battery box needs to be connected to the mounting bracket and other installation structures via a mounting bracket. Repeated installation and disassembly, as well as vibrations during operation, can cause wear on the protruding welded structure. This not only damages the welded structure itself but also affects the stability of battery operation. In this embodiment, the first weldment 60 completely fills the weld seam after welding, and the entire first weldment 60 is in a protected state. This fundamentally avoids the problem of weld reinforcement protrusion and completely eliminates the risk of interference between the weld seam area and external components such as the mounting bracket, thereby improving the overall stability and safety of the battery box after assembly.

[0038] Furthermore, the first plate 10 is positioned above the space of the second plate 20.

[0039] In this embodiment, the first plate 10 is positioned above the space of the second plate 20, such that the connection position between the first plate 10 and the side wall of the housing 50 is offset upwards relative to the connection position between the second plate 20 and the support frame. Specifically, in actual load-bearing process, the battery box is typically supported on the support frame or other mounting structure by the second plate 20, which bears the main load of the battery box, while the first plate 10 abuts against the housing 50 above the space of the second plate 20. This structural layout design means that when the first plate 10, the second plate 20, and the connecting plate 30 have a tendency to flip relative to the first weldment 60, the upper edge of the first plate 10 is used as the flipping axis, and the first weldment 60 experiences less force and is less likely to be damaged. In contrast, when the first plate 10 is positioned below the space of the second plate 20, when the first plate 10, the second plate 20, and the connecting plate 30 have a tendency to flip relative to the first weldment 60, the first weldment 60 itself is the flipping axis, and is more easily damaged under the lever principle. In contrast, the structure of this embodiment has lower strength requirements for the first weldment 60, which improves the durability of the first weldment 60 and extends the service life of the overall battery box structure.

[0040] Specifically, the side of the second plate 20 furthest from the first plate 10 is coplanar with the bottom surface of the box 50.

[0041] In this embodiment, the side of the second plate 20 furthest from the first plate 10 is coplanar with the bottom surface of the housing 50, allowing the battery box to be directly supported by the second plate 20 and other mounting structures during installation. In other words, the second plate 20 and the bottom of the housing 50 together form a reliable support surface, capable of stably bearing the weight of the battery box itself and the loads generated during operation. Since the mounting surface of the second plate 20 is on the same plane as the bottom surface of the housing 50, the overall height of the battery box after installation is more definite and precise, avoiding local stress concentration or additional interference caused by fluctuations in the height of the bottom of the battery box. This improves the stability and safety of the battery box after installation, further reduces the risk of wear in the weld area, and improves the reliability and service life of the overall battery box structure.

[0042] According to one embodiment of the present invention, the battery box further includes a second weldment 70, which is connected between the first plate 10 and the side wall of the box body 50.

[0043] In this embodiment, by adding a second weldment 70 between the first plate 10 and the side wall of the housing 50, the connection strength and structural rigidity between the first plate 10 and the housing 50 are further enhanced. Specifically, the connection between the first plate 10 and the housing 50 relies not only on the first weldment 60 at the connecting plate 30, but also on the second weldment 70 forming an additional connection path between the first plate 10 and the side wall of the housing 50, with welded connections on both sides of the first plate 10. This effectively improves the overall structural strength and stability of the battery box, reduces the risk of overturning that may occur with unilateral welded connections, and significantly extends the service life of the battery box structure. Furthermore, the second weldment 70 also effectively alleviates the structural stress borne by the first weldment 60, thereby reducing the risk of fatigue cracking caused by long-term vibration or repeated loading during use, further improving the overall reliability of the battery box structure.

[0044] Furthermore, the first plate 10 has multiple through slots, and the second weldment 70 is connected to the box body 50 along the edge of the through slot.

[0045] In this embodiment, by providing multiple through slots on the first plate 10, the second weldment 70 can be connected to the side wall of the housing 50 along the edge of the through slot. The second weldment 70 is hidden in the through slot, which reduces the overall projected outline size of the first plate 10 and the second weldment 70 on the side wall of the housing 50, and also reduces the risk of the second weldment 70 being damaged by collision, thereby further improving the reliability of the welded connection and the durability of the welded structure.

[0046] According to one embodiment of the present invention, the connecting plate 30 is an arc-shaped plate, and the working surface 33 has a cross-section at the first straight edge 31 that is parallel to the first plate 10; and / or, the working surface 33 has a cross-section at the second straight edge 32 that is parallel to the second plate 20.

[0047] In this embodiment, by designing the connecting plate 30 as an arc-shaped plate structure, and ensuring that the working surface 33 is parallel to the first plate 10 on the first straight side 31 and / or parallel to the second plate 20 on the second straight side 32, a smooth transition between the connecting plate 30 and the first plate 10 and the second plate 20 is guaranteed, thereby effectively avoiding stress concentration caused by sharp angle connections. Specifically, the arc-shaped design makes the stress on the connecting plate 30 more uniform and reasonable, significantly improving the structure's vibration resistance and fatigue resistance, and enhancing the overall stability and service life of the battery box structure.

[0048] According to one embodiment of the present invention, two points are randomly selected on the working surface 33 to form tangent planes. The two tangent planes intersect the working surface 33 to obtain a tangent line, and the two tangent lines are parallel to each other.

[0049] In this embodiment, the shape of the working surface 33 is defined such that the tangents corresponding to the cross-sections at any two points are parallel to each other. In other words, the connecting plate 30 is a tensile body or a part of a tensile body. This makes the connecting surface of the connecting plate 30 have more regular geometric characteristics and a more uniform and reasonable load distribution. At the same time, from a processing perspective, this regular curved surface structure facilitates production processing and quality control. For example, the connecting plate 30 can be obtained by sheet metal processing of cold-rolled steel plate, which helps to improve the manufacturing accuracy and structural reliability of the connecting plate 30.

[0050] According to one embodiment of the present invention, the battery box further includes a reinforcing rib 40, which is connected to the first plate 10, the second plate 20 and the outer surface 34.

[0051] In this embodiment, by adding reinforcing ribs 40 and connecting them simultaneously to the first plate 10, the second plate 20, and the outer surface 34, the rigidity and strength of the overall battery box structure are further enhanced. During the operation and assembly of the battery box, the reinforcing ribs 40 play a role in structural support and stress dispersion, effectively resisting external loads and internal vibration impacts on the battery box during operation, and improving the overall deformation resistance and fatigue resistance of the battery box structure. In addition, with the overall load of the battery box remaining unchanged, the addition of reinforcing ribs 40 can also reduce the thickness of the various structural plates of the battery box, thereby reducing the overall weight while ensuring structural strength and rigidity, making the battery box lighter.

[0052] According to one embodiment of the present invention, the first straight edge 31 is parallel to the second straight edge 32; and / or, the first plate 10 and the second plate 20 are perpendicular to each other.

[0053] In this embodiment, by designing the first straight edge 31 and the second straight edge 32 to be parallel to each other and / or the first plate 10 and the second plate 20 to be perpendicular to each other, the structure of the battery box is made more regular and standardized, which facilitates processing and assembly and improves production efficiency.

[0054] According to one embodiment of the present invention, the second plate 20 is provided with a plurality of mounting holes 21, which are used to connect with the support frame.

[0055] In this embodiment, by providing multiple mounting holes 21 on the second plate 20, the second plate 20 can be more easily and reliably connected to the external support frame, facilitating the installation, positioning, and fixation of the battery box, and effectively improving the robustness and stability of the connection between the battery box and the support frame. The arrangement of multiple mounting holes 21 also allows for a reasonable and even distribution of the connection load, avoiding structural damage or deformation caused by concentrated local loads, significantly improving the safety and reliability of the battery box under actual operating conditions. Furthermore, the design of the mounting holes 21 facilitates the maintenance and replacement of the battery box, improving overall installation and maintenance efficiency and reducing maintenance costs.

[0056] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0057] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0058] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0059] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the design concept of the present utility model using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A battery box characterized by, include: Box; The first plate is attached to the side wall of the box body; Second board; The connecting plate includes a first straight edge and a second straight edge, the first plate being connected to the first straight edge and the second plate being connected to the second straight edge; the connecting plate also includes a working surface and an outer surface, the working surface being connected to the first straight edge and the second straight edge respectively, the outer surface being connected to the first straight edge and the second straight edge respectively, the normal of any point on the outer surface being directed toward the angle formed by the first plate and the second plate, and a weld is formed between the working surface and the housing at intervals; The first weldment is placed in the weld and connected to the working surface and the box body respectively.

2. The battery pack of claim 1, wherein, The first weldment completely fills the weld seam.

3. The battery pack of claim 2, wherein, The first plate is located above the space of the second plate.

4. The battery pack of claim 3, wherein, The side of the second plate furthest from the first plate is coplanar with the bottom surface of the box.

5. The battery pack of claim 1, wherein, The battery box also includes a second welded component, which is connected between the first plate and the side wall of the box body.

6. The battery pack of claim 5, wherein, The first plate has multiple through slots, and the second weldment is connected to the box body along the edge of the through slot.

7. The battery pack of claim 1, wherein, The connecting plate is an arc plate, and the working surface at the first straight edge is parallel to the first plate; and / or, the working surface at the second straight edge is parallel to the second plate.

8. The battery pack of claim 1, wherein, Two points are randomly selected on the working surface to form tangent planes. The two tangent planes intersect the working surface to form a tangent line, and the two tangent lines are parallel to each other.

9. The battery box according to any one of claims 1 to 8, characterized in that, The battery box also includes reinforcing ribs, which are connected to the first plate, the second plate, and the outer surface.

10. The battery box according to any one of claims 1 to 8, characterized in that, The first straight edge is parallel to the second straight edge; And / or, the first plate and the second plate are perpendicular to each other.

11. The battery box according to any one of claims 1 to 8, characterized in that, The second plate has multiple mounting holes for connecting with the support frame.

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