Edge beam and battery pack comprising same

Abstract

The utility model relates to the technical field of battery production, in particular to an edge beam and a battery pack comprising the edge beam, the edge beam is used for splicing to form a battery pack frame, the edge beam comprises an edge beam main body and reinforcing ribs, the edge beam main body is provided with a first surface and a second surface which are opposite in the width direction of the edge beam, and the first surface is used for forming the outer contour of the battery pack frame; the reinforcing ribs are arranged on the first surface at intervals. According to the side beam, the reinforcing ribs are arranged on the side beam main body at intervals, so that when the side beam is subjected to side collision, the reinforcing ribs can better absorb and disperse stress, the deformation of the side beam main body caused by overlarge local stress is avoided, the collision resistance and the extrusion resistance of a battery pack frame are enhanced, and the damage of side collision to a battery pack is reduced; therefore, the safety performance of the battery pack is improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production, and in particular to a side beam and a battery pack comprising the same. Background Art

[0002] In order to improve the battery pack's ability to cope with various working conditions, the structural strength of the battery pack must be improved. The side beam, as one of the important components of the battery pack frame, is not only used to fix the side beam mounting point with the vehicle body, but also bears the vibration and impact that the battery pack may encounter during vehicle driving. Therefore, the structural strength of the side beam directly affects the structural strength of the battery pack, which directly affects the safety performance of the entire battery pack.

[0003] During the battery pack collision test, when the side pillar collides with the side beam, the side beam will be deformed and expand and shrink toward the inside of the battery pack. The expanded and shrunk side beam is easy to squeeze the battery module in the battery frame under the action of lateral force. The traditional side beam has weak anti-extrusion and anti-pillar collision capabilities, resulting in serious extrusion and deformation of the battery module, and even damage to the battery module, which may cause internal short circuit, external short circuit, insulation failure or battery cell leakage in the battery pack, causing safety accidents and affecting the safety performance of the battery pack.

[0004] In view of this, this application is specially filed. Utility Model Content

[0005] The present application provides a side beam and a battery pack containing the same, so as to solve the problem of how to improve the anti-collision and anti-extrusion performance of the side beam.

[0006] On the one hand, the present application provides a side beam for splicing to form a battery pack frame, the side beam comprising:

[0007] A side beam body, wherein the side beam body has a first surface and a second surface opposite to each other along a width direction of the side beam, wherein the first surface is used to form an outer contour of the battery pack frame;

[0008] Reinforcing ribs, a plurality of said reinforcing ribs are arranged at intervals on the first surface.

[0009] In some embodiments, the reinforcing ribs extend along the length direction of the side beam, and a plurality of the reinforcing ribs are spaced apart on the first surface along the height direction of the side beam.

[0010] In some embodiments, a plurality of the reinforcing ribs are arranged on the first surface at equal intervals along the height direction.

[0011] In some embodiments, an arched surface is provided at one end of the reinforcing rib along the width direction, and along the length direction, the width of the reinforcing rib gradually decreases from the center of the reinforcing rib to both ends of the reinforcing rib.

[0012] In some embodiments, the length and height of the side beam body are denoted as L and H respectively, the minimum width and maximum width of the reinforcement rib are denoted as d and e respectively, and the height of the reinforcement rib is denoted as t, wherein H≥0.1×L, e≥0.1×H, d≥0.1×e, and t≥0.3×e.

[0013] In some embodiments, the reinforcing ribs include transverse reinforcing ribs perpendicular to the first surface and longitudinal reinforcing ribs connected to the first surface, and the transverse reinforcing ribs and the longitudinal reinforcing ribs are perpendicular to each other.

[0014] In some embodiments, the length and height of the side beam body are respectively denoted as L and H, the width and height of the transverse reinforcement rib are respectively denoted as d and t1, and the width and height of the longitudinal reinforcement rib are respectively denoted as t2 and e, wherein H≥0.1×L, d=e≥0.1×H, t1=t2=0.2×d.

[0015] In some of the embodiments, an arched surface is provided at one end of the transverse reinforcing rib along the width direction, and along the length direction, the width of the transverse reinforcing rib gradually decreases from the center of the transverse reinforcing rib to both ends of the transverse reinforcing rib.

[0016] In some of the embodiments, the side beam further comprises a mounting bracket for connecting to a side beam mounting point of a vehicle body, the mounting bracket is connected to the first surface, and the plurality of reinforcing ribs are located above the mounting bracket.

[0017] On the other hand, the present application also provides a battery pack, comprising the side beam as described above.

[0018] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0019] 1. The side beam in the present application has multiple reinforcing ribs spaced apart on the side beam body. When the side beam is subjected to a side collision, the reinforcing ribs can better absorb and disperse the force, thereby preventing the side beam body from being deformed due to excessive local force, enhancing the anti-collision and anti-extrusion performance of the battery pack frame, reducing the damage to the battery pack caused by a side collision, and thus improving the safety performance of the battery pack.

[0020] 2. The side beam in this application has a good vibration reduction effect due to the reinforcement rib structure, simple structure and easy processing. Multiple reinforcement ribs are arranged on the side beam body, which has little effect on the overall weight of the side beam, ensuring the rationality of the installation and layout of the battery pack, thereby ensuring the vehicle's cruising range and safety performance.

[0021] 3. The battery pack in the present application includes the side beam in the present application, and therefore also includes all the above advantages of the side beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of a side beam in an embodiment of the present application;

[0023] Figure 2 is a front view of a side beam in an embodiment of the present application;

[0024] Figure 3 yes Figure 2 Sectional view along AA direction;

[0025] Figure 4 is a side view of a side beam in an embodiment of the present application;

[0026] Figure 5 is a front view of another side beam in an embodiment of the present application;

[0027] Figure 6 It is a side view of another side beam in an embodiment of the present application.

[0028] In the figure: 100, side beam; 110, side beam body; 111, first surface; 112, second surface; 120, reinforcing rib; 120A, first reinforcing rib; 120B, second reinforcing rib; 120C, third reinforcing rib; 120D, vibration damping groove; 121, arched surface; 122, transverse reinforcing rib; 123, longitudinal reinforcing rib. DETAILED DESCRIPTION

[0029] The technical solution of the present application will be described clearly and completely below in conjunction with the embodiments. 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 the field without creative work are within the scope of protection of the present application.

[0030] In the embodiment of the present application, a side beam 100 is provided for splicing to form a battery pack frame. For the specific structure of the side beam 100, please refer to Figures 1 to 6 , which includes a side beam body 110 and a reinforcing rib 120. The side beam body 110 has a first surface 111 and a second surface 112 opposite to each other along the width direction of the side beam 100. The first surface 111 is used to form the outer contour of the battery pack frame; a plurality of reinforcing ribs 120 are arranged at intervals on the first surface 111.

[0031] According to the applied side beam 100, by arranging a plurality of reinforcing ribs 120 at intervals on the side beam body 110, when the side beam 100 has a side collision, the reinforcing ribs 120 can better absorb and disperse the force, avoid deformation of the side beam body 110 due to excessive local force, enhance the anti-collision and anti-extrusion performance of the battery pack frame, reduce the damage to the battery pack caused by the side collision, thereby improving the safety performance of the battery pack, and the reinforcing ribs 120 have a simple structure, easy processing, good vibration reduction effect, and little effect on the overall weight of the side beam 100, thereby ensuring the rationality of the installation and layout of the battery pack, thereby ensuring the vehicle's range and safety performance.

[0032] As an embodiment not shown, the side beam 100 also includes a mounting bracket for connecting the mounting point of the side beam 100 to the vehicle body, the mounting bracket is connected to the first surface 111, and a plurality of reinforcing ribs 120 are located above the mounting bracket, so that a reasonable gap exists between the mounting bracket and the reinforcing ribs 120, which is not only conducive to the assembly of the mounting bracket with the side beam body 110, improving assembly efficiency and reducing production costs, but also facilitates the mounting bracket to avoid the reinforcing ribs 120 and be fixedly connected to the mounting point of the side beam 100 of the vehicle body, making assembly more convenient.

[0033] Preferably, one end of the reinforcing rib 120 along the width direction of the side beam 100 is fixedly connected to the first surface 111 of the side beam body 110 by welding, so that multiple reinforcing ribs 120 and the side beam body 110 form an integrated structure, with high welding efficiency, good welding quality, high tensile strength at the weld, suitable for automated production, and reducing labor costs and time costs.

[0034] like Figures 1 to 6 As shown, the reinforcing rib 120 extends along the length direction of the side beam 100. When the side beam 100 collides sideways, external force acts on the reinforcing rib 120, and the reinforcing rib 120 absorbs the force and disperses the force to both sides of the length direction of the side beam 100, thereby increasing the force-bearing area of ​​the side beam body 110 and making the side beam body 110 evenly stressed. This can effectively prevent the side beam body 110 from being deformed due to excessive local force. In addition, during the actual use of the vehicle, the displacement of the battery pack in the Y direction can be effectively limited, thereby reducing the vibration amplitude of the battery pack.

[0035] like Figures 1 to 6 As shown, a plurality of reinforcing ribs 120 are arranged at intervals on the first surface 111 along the height direction of the side beam 100, so that the plurality of reinforcing ribs 120 absorb the force respectively and disperse the force to the two ends of the length direction of the side beam 100, thereby ensuring that the overall force of the side beam body 110 is more uniform, further enhancing the anti-collision and anti-extrusion performance of the side beam 100, thereby improving the structural strength of the side beam 100.

[0036] like Figure 1 , Figure 4 and Figure 6As shown, two adjacent reinforcing ribs 120 and the side beam body 110 construct a vibration-damping groove 120D with open ends along the length direction of the side beam 100, which can buffer and absorb the remaining collision energy transmitted from the first line of defense, block the collision deformation in the vibration-damping groove 120D, and disperse it to the outside through the two open ends of the vibration-damping groove 120D, thereby achieving anti-vibration and noise reduction effects and avoiding squeezing of the battery module in the battery frame. When the battery pack is subjected to a vibration test or an impact test, the vibration-damping groove 120D can absorb and reduce the Y-direction vibration of the battery pack, effectively absorbing and reducing the vibration of the battery pack itself and the vibration energy transmitted to the outside.

[0037] like Figures 1 to 6 As shown, a plurality of reinforcing ribs 120 are arranged on the first surface 111 at equal intervals along the height direction of the side beam 100. When the side beam 100 is subjected to a side collision, the plurality of reinforcing ribs 120 absorb and disperse the force in roughly the same manner along the height direction of the side beam 100, thereby ensuring that the entire side beam 100 is subjected to equal force, and preventing the side beam 100 from being subjected to excessive force locally and deforming excessively, causing the battery pack structure to loosen or rupture.

[0038] As an optional implementation, Figures 1 to 4 As shown, the reinforcing rib 120 is provided with an arched surface 121 at one end along the width direction of the side beam 100, and along the length direction of the side beam 100, the width of the reinforcing rib 120 gradually decreases from the center of the reinforcing rib 120 to the two ends of the reinforcing rib 120. The reinforcing rib 120 is an arched reinforcing rib with an arched surface 121. The arched reinforcing rib is easy to process and form, and has excellent anti-collision and anti-extrusion properties. When impacted, the arched curvature can evenly disperse the force, effectively buffer the impact load, and extend the service life of the side beam 100.

[0039] like Figure 2 and Figure 4 As shown, the length and height of the side beam body 110 are respectively denoted as L and H, the minimum width and maximum width of the arch reinforcement rib are respectively denoted as d and e, and the height of the arch reinforcement rib is denoted as t, wherein H≥0.1×L, e≥0.1×H, d≥0.1×e, t≥0.3×e, to ensure that the minimum width, maximum width and height of the arch reinforcement rib meet the structural strength requirements, while controlling the weight of the arch reinforcement rib to avoid the maximum width of the arch reinforcement rib being too large, resulting in excessive weight of the arch reinforcement rib, thereby affecting the weight of the side beam 100.

[0040] A plurality of arched reinforcing ribs are arranged at intervals on the first surface 111 along the height direction of the edge beam 100 to form a reinforcing rib group. Figures 1 to 4As shown, the reinforcing rib group includes a first reinforcing rib 120A, a first reinforcing rib 120B and a third reinforcing rib 120C arranged sequentially from bottom to top, which can realize the absorption and dispersion of force at three vibration reduction points, and the force on the side beam 100 is more uniform, which can effectively avoid excessive local force. Of course, setting three arched reinforcing ribs on the side beam body 110 is only a preferred implementation method. In addition, other numbers of reinforcing ribs 120 can also be set, such as two, four, five, etc.

[0041] like Figure 4 As shown, the bottom heights of the first reinforcing rib 120A, the bottom heights of the first reinforcing rib 120B and the bottom heights of the third reinforcing rib 120C are denoted as a, b and c, respectively, wherein a≥0.2×H, 0.6×H≥a≥0.4×H, and c≥0.8×H, thereby ensuring that there is a reasonable gap between the first reinforcing rib 120A and the first reinforcing rib 120B and between the first reinforcing rib 120B and the third reinforcing rib 120C, thereby preventing deformation due to stress and interference with each other, which would affect the service life of the arched reinforcing ribs. Furthermore, the evenly distributed arrangement of the multiple arched reinforcing ribs makes the arched reinforcing ribs more evenly stressed when subjected to extrusion, thereby improving the compressive strength of the edge beam 100 to a greater extent.

[0042] like Figure 5 and Figure 6 As shown, as an optional embodiment, the reinforcement ribs 120 include transverse reinforcement ribs 122 perpendicular to the first surface 111 and longitudinal reinforcement ribs 123 connected to the first surface 111. The transverse reinforcement ribs 122 and the longitudinal reinforcement ribs 123 are perpendicular to each other. The longitudinal reinforcement ribs 123 are fixedly connected to the side beam body 110 to increase the contact area and improve the connection strength between the two. The transverse reinforcement ribs 122 can better buffer and absorb the remaining collision energy transmitted from the first line of defense, and the anti-collision and anti-extrusion performance is better.

[0043] like Figure 6 As shown, the transverse reinforcement rib 122 and the longitudinal reinforcement rib 123 are perpendicular to each other to form an inverted L-shaped reinforcement rib. Specifically, one end of the transverse reinforcement rib 122 along the width direction of the side beam 100 is connected to the bottom end of the longitudinal reinforcement rib 123. When the side beam 100 collides sideways, the transverse reinforcement rib 122 absorbs the remaining collision energy transmitted from the first line of defense, and disperses the force to the two ends of the transverse reinforcement rib 122 along the length direction of the side beam 100 and the longitudinal reinforcement rib 123, while the longitudinal reinforcement rib 123 continues to disperse the force to the two ends of the longitudinal reinforcement rib 123 along the length direction of the side beam 100 and the side beam body 110, which can not only reduce the collision energy transmitted to the side beam body 110, but also disperse the force on the side beam body 110, making the force more uniform.

[0044] like Figure 5 and Figure 6As shown, the length and height of the side beam body 110 are respectively recorded as L and H, the width and height of the transverse reinforcement rib 122 are respectively recorded as d and t1, and the width and height of the longitudinal reinforcement rib 123 are respectively recorded as t2 and e, wherein H≥0.1×L, d=e≥0.1×H, t1=t2=0.2×d, thereby ensuring that the width and height of the inverted L-shaped reinforcement rib meet the structural strength requirements and controlling the weight of the inverted L-shaped reinforcement rib to avoid excessive weight of the inverted L-shaped reinforcement rib due to excessive size of the inverted L-shaped reinforcement rib, thereby affecting the weight of the side beam 100.

[0045] A plurality of inverted L-shaped reinforcing ribs are arranged at intervals along the height direction of the edge beam 100 on the first surface 111 to form a reinforcing rib group. Figure 5 and Figure 6 As shown, the reinforcing rib group includes a first reinforcing rib 120A, a first reinforcing rib 120B and a third reinforcing rib 120C arranged sequentially from bottom to top, which can realize the absorption and dispersion of force at three vibration reduction points, and the force on the side beam 100 is more uniform, which can effectively avoid excessive local force. Of course, setting three reverse L-shaped reinforcing ribs on the side beam body 110 is only a preferred implementation method. In addition, other numbers of reinforcing ribs 120 can also be set, such as two, four, five, etc.

[0046] Preferably, an arched surface 121 is provided at one end of the transverse reinforcement rib 122 along the width direction of the side beam 100, and along the length direction of the side beam 100, the width of the transverse reinforcement rib 122 gradually decreases from the center of the transverse reinforcement rib 122 to both ends of the transverse reinforcement rib 122. The transverse reinforcement rib 122 is an arched transverse reinforcement rib 122 with an arched surface 121. The arched transverse reinforcement rib 122 is easy to process and form, and has excellent anti-collision and anti-extrusion properties. When impacted, the arched curvature can evenly disperse the force, effectively buffer the impact load, and extend the service life of the side beam 100.

[0047] A battery pack is also provided in an embodiment of the present application, which includes the side beam 100 in the above embodiment, and also includes all the advantages of the side beam 100, which will not be described again here.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0049] In addition, the terms "above" and "below" 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 "above" and "below" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "multiple" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] In the present application, the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. mean that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the described specific features, structures, materials or characteristics may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0052] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A side beam used for splicing to form a battery pack frame, characterized in that: The side beam comprises: A side beam body, wherein the side beam body has a first surface and a second surface opposite to each other along a width direction of the side beam, wherein the first surface is used to form an outer contour of the battery pack frame; Reinforcing ribs, a plurality of said reinforcing ribs are arranged at intervals on the first surface.

2. The side beam according to claim 1, characterized in that: The reinforcing ribs extend along the length direction of the side beam, and a plurality of the reinforcing ribs are arranged on the first surface at intervals along the height direction of the side beam.

3. The side beam according to claim 2, characterized in that: A plurality of reinforcing ribs are arranged on the first surface at equal intervals along the height direction.

4. The side beam according to claim 2, characterized in that: An arched surface is provided at one end of the reinforcing rib along the width direction, and along the length direction, the width of the reinforcing rib gradually decreases from the center of the reinforcing rib to both ends of the reinforcing rib.

5. The side beam according to claim 4, characterized in that: The length and height of the side beam body are denoted as L and H respectively, the minimum width and maximum width of the reinforcement rib are denoted as d and e respectively, and the height of the reinforcement rib is denoted as t, wherein H≥0.1×L, e≥0.1×H, d≥0.1×e, and t≥0.3×e.

6. The side beam according to claim 2, characterized in that: The reinforcing ribs include transverse reinforcing ribs perpendicular to the first surface and longitudinal reinforcing ribs connected to the first surface, and the transverse reinforcing ribs and the longitudinal reinforcing ribs are perpendicular to each other.

7. The side beam according to claim 6, characterized in that: The length and height of the side beam body are denoted as L and H respectively, the width and height of the transverse reinforcement rib are denoted as d and t1 respectively, and the width and height of the longitudinal reinforcement rib are denoted as t2 and e respectively, wherein H≥0.1×L, d=e≥0.1×H, t1=t2=0.2×d.

8. The side beam according to claim 6, characterized in that: An arched surface is provided at one end of the transverse reinforcing rib along the width direction, and along the length direction, the width of the transverse reinforcing rib gradually decreases from the center of the transverse reinforcing rib to both ends of the transverse reinforcing rib.

9. The side beam according to any one of claims 1 to 8, characterized in that: The side beam further comprises a mounting bracket for connecting to a side beam mounting point of a vehicle body, the mounting bracket being connected to the first surface, and the plurality of reinforcing ribs being located above the mounting bracket.

10. A battery pack, characterized in that: The invention comprises the edge beam as claimed in any one of claims 1 to 9.

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