Bridge type cross beam and battery pack vibration tool comprising same

Abstract

The utility model relates to the technical field of battery production, in particular to a bridge type cross beam and a battery pack vibration tool comprising the bridge type cross beam, the bridge type cross beam comprises a bridge deck, a battery mounting plate and a supporting column, and the bridge deck is provided with an arched hole penetrating through the bottom end of the bridge deck; the battery mounting plate is arranged below the bridge deck and seals the open end of the arched hole, and the battery mounting plate is fixedly connected with the battery pack; the upper end and the lower end of the supporting column are connected with the bridge deck slab and the battery mounting plate respectively. According to the bridge type cross beam, the arch-shaped holes are formed in the bridge deck slab to form an arch structure, the weight of a battery pack vibration tool can be reduced, stress can be better absorbed and dispersed, the battery mounting plate and the bridge deck slab are connected through the supporting columns, the bridge type cross beam has the good bearing capacity, and the service life of the bridge type cross beam is prolonged. Therefore, the battery pack vibration tool has excellent structural strength and rigidity.

Description

Technical Field

[0001] The present application relates to the field of battery production technology, and in particular to a bridge-type crossbeam and a battery pack vibration tooling comprising the same. Background Art

[0002] With the country's vigorous promotion of the new energy field, new energy electric vehicles are becoming more and more popular among the public. The battery pack is the core energy source of new energy electric vehicles, and safety testing and verification are required to meet the qualified standards. The vibration test simulates the vibration excitation and impact generated by the battery pack mounted on the vehicle body during driving. It is a mandatory test item required by the national standard and is also a basic requirement to ensure the mechanical safety of the battery pack.

[0003] In the prior art, the battery pack vibration fixture can reduce the abnormal vibration of the battery pack during the vibration test by fixing and clamping the battery pack, thereby reducing the risk of battery pack vibration failure. In the simulation process and the actual battery pack vibration test, the battery pack vibration fixture may fail due to its own excessive weight or insufficient rigidity. In particular, for battery packs with a middle mounting point, the middle crossbeam of the battery pack vibration fixture has the greatest impact on the overall weight and rigidity of the battery pack vibration fixture.

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

[0005] The present application provides a bridge-type crossbeam and a battery pack vibration tooling including the same, so as to solve the problem of how to improve the structural strength of the battery pack vibration tooling and ensure the accuracy of the battery pack vibration test.

[0006] In one aspect, the present application provides a bridge beam for a battery pack vibration tooling, the bridge beam comprising:

[0007] A bridge deck, wherein the bridge deck is provided with an arched hole penetrating through the bottom end thereof;

[0008] A battery mounting plate, which is disposed below the bridge deck and closes the open end of the arched hole, and is fixedly connected to the battery pack;

[0009] A support column is arranged in the arch hole, and the upper and lower ends of the support column are respectively connected to the bridge deck and the battery mounting plate.

[0010] In some embodiments, the arched hole passes through both ends of the bridge deck along the width direction of the bridge beam, and the hole axis of the arched hole is perpendicular to the length direction of the bridge beam.

[0011] In some of the embodiments, the bridge deck is provided with dispersed holes penetrating the bridge deck along the width direction of the bridge beam, and at least two of the dispersed holes are symmetrically arranged on both sides of the hole axis of the arched hole.

[0012] In some of the embodiments, a plurality of the dispersed holes are spaced apart along the length direction of the bridge beam to form dispersed hole groups, and two dispersed hole groups are symmetrically arranged on both sides of the hole axis of the arched hole.

[0013] In some embodiments, the dispersed holes located at both ends of the bridge beam in the length direction penetrate the bottom end of the bridge deck.

[0014] In some embodiments, the longitudinal section of the dispersed holes along the length direction of the bridge beam is a semi-ellipse that is narrow at the top and wide at the bottom;

[0015] Along the length direction of the bridge beam, the major axis dimensions of the dispersed holes in each dispersed hole group decrease successively from the outside to the inside.

[0016] In some embodiments, the support column includes a first support portion and a second support portion, the first support portion and the second support portion are integrally connected and cross-arranged, the first support portion extends along the length direction of the bridge beam, and the second support portion extends along the width direction of the bridge beam.

[0017] In some embodiments, the width of the battery pack is denoted as W1, and the height of the bridge beam is denoted as H, wherein the length L of the battery mounting plate is equal to 1.2W1~1.3W1, the width W2 of the battery mounting plate is equal to 0.1L~0.15L, the thickness t1 of the battery mounting plate is equal to 0.1H, and the minimum distance t2 between the top surface of the bridge panel and the wall of the arched hole is equal to 2t1.

[0018] In some of the embodiments, the bridge deck is provided with ribs at one or both ends along its length direction, and the ends of the ribs extend downwardly and are connected to the battery mounting plate.

[0019] On the other hand, the present application also provides a battery pack vibration tooling, comprising any of the bridge beams described above.

[0020] After adopting the above technical solution, the present application has the following beneficial effects compared with the prior art.

[0021] 1. The bridge beam in this application has arched holes on the bridge deck to form an arch structure, which can not only reduce the weight of the battery pack vibration tooling, but also better absorb and disperse the force, thereby ensuring that the battery pack vibration tooling has excellent structural strength and rigidity.

[0022] 2. The bridge beam in this application connects the bridge deck and the battery mounting plate through the upper and lower ends of the support column, so that the battery mounting plate and the bridge deck are connected as one body, especially supporting the top of the arched hole to ensure that the bridge deck has good bearing capacity and prevent the battery pack from vibrating and failing.

[0023] 3. The battery pack vibration tooling in the present application includes the bridge beam in the present application, and therefore also includes all the above-mentioned advantages of the bridge beam. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a front view of a bridge beam in the present application;

[0025] Figure 2 yes Figure 1 Sectional view along AA direction;

[0026] Figure 3 It is a top view of a bridge beam in the present application.

[0027] In the figure: 100, bridge beam; 110, bridge deck; 111, arched hole; 112, scattered hole group; 1121, scattered holes; 120, battery mounting plate; 121, battery fixing hole; 122, base fixing hole; 130, support column; 131, first support part; 1311, first arcuate surface; 132, second support part; 1321, second arcuate surface; 140, rib plate. DETAILED DESCRIPTION

[0028] 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.

[0029] In the embodiment of the present application, a bridge beam 100 is provided as an important component of the battery pack vibration tooling. For the specific structure of the bridge beam 100, please refer to Figures 1 to 3 , which includes a bridge deck 110, a battery mounting plate 120 and a support column 130, wherein the bridge deck 110 is provided with an arched hole 111 running through its bottom end; the battery mounting plate 120 is arranged below the bridge deck 110 and closes the open end of the arched hole 111, and the battery mounting plate 120 is fixedly connected to the battery pack; the support column 130 is arranged in the arched hole 111, and the upper and lower ends of the support column 130 are respectively connected to the bridge deck 110 and the battery mounting plate 120.

[0030] According to the applied bridge beam 100, an arched hole 111 is arranged on the bridge deck 110 to form an arch structure, which can not only reduce the weight of the battery pack vibration tooling, but also better absorb and disperse the force, thereby ensuring that the battery pack vibration tooling has excellent structural strength and rigidity. At the same time, the bridge deck 110 and the battery mounting plate 120 are respectively connected through the upper and lower ends of the support column 130, so that the battery mounting plate 120 and the bridge deck 110 are connected as one body, especially supporting the top of the arched hole 111, ensuring that the bridge deck 110 has a good bearing capacity and preventing the battery pack from vibrating and failing.

[0031] like Figure 1 and Figure 3 As shown, a battery fixing hole 121 is provided on the battery mounting plate 120, and a plurality of battery fixing holes 121 are arranged in sequence and at intervals along the length direction of the bridge beam 100, so that a plurality of battery fasteners can pass through the corresponding battery fixing holes 121 respectively, and the battery mounting plate 120 is fixedly connected to the battery pack located therebelow, so that the force on the battery pack is more stable, and the test data obtained from the battery pack vibration test is more accurate.

[0032] Preferably, the battery fixing holes 121 on the battery mounting plate 120 are adapted to battery packs of different specifications, so that the same battery pack vibration tooling can be used to perform vibration tests on battery packs of different specifications, which helps to reduce the cost of battery pack vibration testing.

[0033] like Figure 1 and Figure 3 As shown, the battery mounting plate 120 is provided with base fixing holes 122 , and a plurality of base fixing holes 122 are arranged at both ends of the battery mounting plate 120 along the length direction of the bridge beam 100 so as to fix the bridge beam 100 with the base.

[0034] As an embodiment not shown, the bridge beam 100 can be used as a side beam in the battery pack vibration tooling, and the two side beams are respectively arranged at the two ends of the battery pack and fixedly connected to the battery pack below. Of course, the bridge beam 100 can be used as a middle reinforcement beam in the battery pack vibration tooling, and the middle reinforcement beam is arranged in the middle of the battery pack and fixedly connected to the battery pack below. It is suitable for battery packs with a middle mounting point, has a light weight, high structural strength, and strong bearing capacity, so that the battery pack is balanced.

[0035] like Figure 1 As shown, the arched hole 111 passes through both ends of the bridge deck 110 along the width direction of the bridge beam 100, and the hole axis of the arched hole 111 is perpendicular to the length direction of the bridge beam 100, which is beneficial to increase the span of the arched hole 111, which can not only reduce the weight of the middle reinforcement beam, but also improve the ability of the bridge beam 100 to resist external pressure and deformation.

[0036] The width of the battery pack is denoted as W1, and the height of the bridge beam 100 is denoted as H. For example, the length L of the battery mounting plate 120 is equal to 1.2 to 1.3 times the width W1 of the battery pack, and the width W2 of the battery mounting plate 120 is equal to 0.1 to 0.15 times the length L of the battery mounting plate 120. An arched hole 111 is arranged on the bridge panel 110 to form an arch structure. Since the arch structure has good strength and rigidity, the height of the bridge beam 100 can be appropriately reduced. The height H of the bridge beam 100 is equal to the width W2 of the battery mounting plate 120, that is, the height H of the bridge beam 100 is equal to the width of the bridge beam 100.

[0037] Exemplarily, the thickness t1 of the battery mounting plate 120 is equal to 0.1 times the height H of the bridge beam 100, and the minimum distance t2 between the top surface of the bridge panel 110 and the top wall of the arched hole 111 is equal to 2 times the thickness t1 of the battery mounting plate 120. Appropriately increasing the thickening of the arched structure is beneficial to improving the stiffness of the battery pack vibration tooling.

[0038] like Figure 1 As shown, the bridge deck 110 is provided with dispersed holes 1121 penetrating the bridge deck 110 along the width direction of the bridge beam 100, and at least two dispersed holes 1121 are symmetrically arranged on both sides of the hole axis of the arch hole 111. By symmetrically arranging the dispersed holes 1121 on both sides of the hole axis of the arch hole 111, the force on the entire bridge deck 110 is balanced. On the basis of ensuring the structural strength and rigidity of the bridge deck 110, the weight of the bridge deck 110 is reasonably reduced, thereby adjusting the weight of the battery pack vibration tooling.

[0039] like Figure 1 As shown, a plurality of dispersed holes 1121 are arranged at intervals along the length direction of the bridge beam 100 to form a dispersed hole group 112, and two dispersed hole groups 112 are symmetrically arranged on both sides of the hole axis of the arch hole 111. The weight reduction at both ends of the bridge deck 110 along the length direction is comparable, so that the structural strength and stiffness of the entire bridge deck 110 are comparable, thereby avoiding the bridge deck 110 from being fractured due to uneven local force and affecting the accuracy of the vibration test.

[0040] like Figure 1 As shown, the dispersed holes 1121 located at both ends of the length direction of the bridge beam 100 penetrate the bottom end of the bridge deck 110. On the basis of ensuring the structural strength and rigidity of the bridge deck 110, the weight of the bridge deck 110 is further reduced, so that the weight of the battery pack vibration tooling meets the requirements of the vibration test.

[0041] like Figure 1As shown, the longitudinal section of the dispersed holes 1121 along the length direction of the bridge beam 100 is semi-elliptical, narrow at the top and wide at the bottom, forming semi-elliptical holes, which can not only reduce the weight of the bridge deck 110, but also absorb and disperse the force of battery installation and improve the bearing capacity of the bridge beam 100.

[0042] Since the battery pack vibration fixture simulates the actual vibration of the battery pack on the vehicle, the accuracy of the test results must be ensured. Figure 1 As shown, the arched hole 111 is an upwardly protruding arc. Compared with a circular arch, the arc-shaped arch has better stability, especially the arc-shaped arch, so that the arched hole 111 has a larger span along the length direction of the bridge beam 100, and can evenly transfer the force to the supporting point, so that the entire bridge beam 100 can withstand greater force.

[0043] like Figure 1 As shown, along the length direction of the bridge beam 100, the long axis size of each dispersed hole group 112 decreases from the outside to the inside of the multiple dispersed holes 1121. Under the premise of reducing the weight of the bridge beam 100, the structural strength and rigidity of the bridge beam 100 need to be guaranteed. Since the height of the bridge deck 110 gradually decreases from both ends to the middle, the middle part of the bridge deck 110 is a weak position, and the long axis size of each dispersed hole group 112 decreases from one end of the length direction of the bridge deck 110 to the middle part of the bridge deck 110 according to the multiple dispersed holes 1121, thereby preventing the bridge deck 110 from breaking due to excessively small local height.

[0044] like Figure 1 As shown, each dispersed hole group 112 includes five dispersed holes 1121 arranged at intervals. Since the height of the two ends of the bridge deck 110 is greater than the height of the middle part of the bridge deck 110, the dispersed holes 1121 located at the ends of the bridge deck 110 are the first holes, which are semi-elliptical holes with an open bottom, and the remaining dispersed holes 1121 are semi-elliptical holes with closed bottoms, and the major axis dimension of the first hole is greater than that of the adjacent second hole, which is beneficial to reducing the weight of the bridge beam 100. The second hole, the third hole, the fourth hole and the fifth hole of the same dispersed hole group 112 are arranged at intervals along the length direction of the bridge beam 100 and the major axis dimensions decrease successively, but the number of dispersed holes 1121 in each dispersed hole group 112 is not limited to five.

[0045] like Figure 1 As shown, the first hole is located at one end of the arch hole 111 , and the second hole, the third hole, the fourth hole and the fifth hole are located above the arch hole 111 .

[0046] like Figure 1As shown, the bottom walls of the second hole, the third hole, the fourth hole and the fifth hole of the same dispersed hole group 112 are in the same plane. Therefore, except for the dispersed hole 1121 located at the end of the bridge deck 110, the thickness t3 of the bridge deck 110 between the remaining dispersed holes 1121 and the arched hole 111 is equal, ensuring that the structural strength and stiffness of the entire bridge deck 110 are equivalent.

[0047] Exemplarily, the thickness t3 of the bridge deck 110 between the dispersed holes 1121 and the arched holes 111 is equal to the thickness t1 of the battery mounting plate 120 , ensuring that the force of the battery mounting plate 120 is evenly transmitted to the bridge deck 110 .

[0048] Exemplarily, the minor axis dimension b of the dispersed hole 1121 is equal to 0.05 to 0.1 times the length L of the battery mounting plate 120, the spacing d between two adjacent dispersed holes 1121 is equal to 1.5 times the minor axis dimension b of the dispersed hole 1121, and the major axis dimension c of the dispersed hole 1121 located at the end of the bridge panel 110 is equal to 2 times its minor axis dimension b, thereby ensuring that the dispersed holes 1121 are arranged at equal intervals, the bridge beam 100 has high strength, and the material usage is small.

[0049] like Figure 1 and Figure 3 As shown, the support column 130 includes a first support portion 131 and a second support portion 132, which are integrally connected and cross-arranged. The first support portion 131 extends along the length direction of the bridge beam 100, and the second support portion 132 extends along the width direction of the bridge beam 100, realizing a cross-shaped arrangement in the horizontal and vertical directions to ensure the supporting strength of the support column 130.

[0050] like Figure 1 and Figure 3 As shown, the two end faces of the first support portion 131 along the length direction are first arc-shaped faces 1311 recessed inwardly, and the two end faces of the second support portion 132 along the width direction are second arc-shaped faces 1321 recessed inwardly, so that the support column 130 is constructed as a cross-waisted pillar with high strength and good deformation resistance, thereby achieving stable support for the bridge deck 110.

[0051] Exemplarily, the middle spacing f of the cross waist-shaped pillars is equal to 0.5 times the width W2 of the battery mounting plate 120, the thickness t4 of the first support portion 131 and the thickness t5 of the second support portion 132 are equal, both equal to 2 times the thickness t1 of the battery mounting plate 120, which is beneficial to improving the supporting strength of the cross waist-shaped pillars.

[0052] like Figure 1As shown, the bridge deck 110 is provided with ribs 140 at one or both ends along its length direction, and the ends of the ribs 140 extend downwardly and tilt to connect with the battery mounting plate 120 , which can enhance the connection strength between the bridge deck 110 and the battery mounting plate 120 .

[0053] like Figure 1 As shown, at least two ribs 140 are arranged at intervals along the width direction of the bridge deck 110, respectively connecting the bridge deck 110 and the battery mounting plate 120, further improving the stability of the connection between the two, thereby helping to improve the structural strength of the bridge beam 100.

[0054] Exemplarily, the length e of the rib 140 is equal to 0.05 to 0.1 of the length L of the battery mounting plate 120, that is, the horizontal distance between the upper edge of the bridge deck 110 and the lower edge of the battery mounting plate 120 is equal to the length of the rib 140, ensuring the stability of the entire bridge beam 100 while reducing material usage.

[0055] A battery pack is also provided in an embodiment of the present application, which includes the bridge beam 100 in the above embodiment, and also includes all the advantages of the bridge beam 100, which will not be described in detail here.

[0056] 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.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] 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.

[0059] 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.

[0060] 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 bridge beam for battery pack vibration tooling, characterized in that: The bridge beam comprises: A bridge deck, wherein the bridge deck is provided with an arched hole penetrating through the bottom end thereof; A battery mounting plate, which is disposed below the bridge deck and closes the open end of the arched hole, and is fixedly connected to the battery pack; A support column is arranged in the arch hole, and the upper and lower ends of the support column are respectively connected to the bridge deck and the battery mounting plate.

2. The bridge beam according to claim 1, characterized in that: The arched holes penetrate through both ends of the bridge deck along the width direction of the bridge beam, and the hole axes of the arched holes are perpendicular to the length direction of the bridge beam.

3. The bridge beam according to claim 2, characterized in that: The bridge deck is provided with scattered holes penetrating the bridge deck along the width direction of the bridge beam, and at least two of the scattered holes are symmetrically arranged on both sides of the hole axis of the arched hole.

4. The bridge beam according to claim 3, characterized in that: A plurality of the dispersed holes are arranged at intervals along the length direction of the bridge beam to form dispersed hole groups, and two dispersed hole groups are symmetrically arranged on both sides of the hole axis of the arched hole.

5. The bridge beam according to claim 4, characterized in that: The dispersed holes located at both ends of the bridge beam in the length direction penetrate the bottom end of the bridge deck.

6. The bridge beam according to claim 4, characterized in that: The longitudinal section of the dispersed holes along the length direction of the bridge beam is in a semi-elliptical shape that is narrow at the top and wide at the bottom; Along the length direction of the bridge beam, the major axis dimensions of the dispersed holes in each dispersed hole group decrease successively from the outside to the inside.

7. The bridge beam according to claim 1, characterized in that: The support column includes a first support portion and a second support portion, the first support portion and the second support portion are integrally connected and cross-arranged, the first support portion extends along the length direction of the bridge beam, and the second support portion extends along the width direction of the bridge beam.

8. The bridge beam according to claim 1, characterized in that: The width of the battery pack is denoted as W1, and the height of the bridge beam is denoted as H, wherein the length L of the battery mounting plate is equal to 1.2W1~1.3W1, the width W2 of the battery mounting plate is equal to 0.1L~0.15L, the thickness t1 of the battery mounting plate is equal to 0.1H, and the minimum distance t2 between the top surface of the bridge panel and the wall of the arched hole is equal to 2t1.

9. The bridge beam according to any one of claims 1 to 8, characterized in that: The bridge deck is provided with ribs at one or both ends along the length direction thereof, and the ends of the ribs extend downwardly and are connected to the battery mounting plate.

10. A battery pack vibration tool, characterized in that: It comprises the bridge beam as claimed in any one of claims 1 to 9.

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