Lifting lug structure, battery tray, battery pack and vehicle

Abstract

The utility model provides a lifting lug structure, a battery tray, a battery pack and a vehicle, and relates to the technical field of batteries. The lifting lug structure comprises a lifting lug body and a sleeve, the lifting lug body is used for being connected with a tray body of the battery tray, the sleeve is arranged on the lifting lug body, and the lifting lug body and the sleeve are integrally formed. According to the lifting lug structure, the assembly error of the lifting lug body and the sleeve is reduced, the mounting precision and consistency of the lifting lug body and the sleeve are improved, and the reliability of the lifting lug structure is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, in particular to a lug structure, a battery tray, a battery pack and a vehicle. BACKGROUND

[0002] The battery pack comprises a battery module and a tray, and the tray is used for supporting the battery module.

[0003] In the prior art, the tray comprises a tray body, a lug, a sleeve and a fastener, and the lug is connected to two sides of the tray body. The sleeve is welded to the lug. The sleeve has a connecting hole therein, and the fastener is connected to the vehicle body through the connecting hole to fix the tray on the vehicle body.

[0004] However, the installation precision of the lug and the sleeve is low. UTILITY MODEL CONTENTS

[0005] The present application provides a lug structure, a battery tray, a battery pack and a vehicle to solve the problem of low installation precision of the lug and the sleeve in the prior art.

[0006] In a first aspect, the present application provides a lug structure, comprising:

[0007] a lug body, the lug body being used for connecting to a tray body of a battery tray;

[0008] a sleeve, the sleeve being arranged on the lug body;

[0009] The lug body and the sleeve are integrally formed.

[0010] In some possible implementation manners, the lug structure has a symmetry plane, and the lug structure is symmetrical relative to the symmetry plane.

[0011] In some possible implementation manners, the lug body has a connecting surface, and the connecting surface is used for connecting to the tray body.

[0012] In some possible implementation manners, the lug body comprises a first side surface, a second side surface and a third side surface arranged in sequence, the first side surface and the third side surface are inclined towards the connecting surface, the orthographic projection of the first side surface, the second side surface and the third side surface on the connecting surface is located on the connecting surface, and the first side surface and the third side surface are symmetrical relative to the symmetry plane of the lug structure.

[0013] In some possible implementation manners, the lug body further comprises two fourth side surfaces, one of the fourth side surfaces connects the connecting surface and the first side surface, and the other of the fourth side surfaces connects the connecting surface and the third side surface.

[0014] In some possible implementation manners, the lug body has at least two lightening portions, and the lightening portions are symmetrical relative to the symmetry plane of the lug structure.

[0015] In some possible implementation manners, the sleeve has a mounting hole for connecting with a vehicle body, and an axis of the mounting hole is located on the symmetry plane, and the mounting hole is close to the second side surface.

[0016] In a second aspect, the present application provides a battery tray, comprising a tray body and a plurality of lug structures in any one of the first aspect.

[0017] In a third aspect, the present application provides a battery pack, comprising a battery cell group and any one of the battery trays.

[0018] In a fourth aspect, the present application provides a vehicle, comprising a vehicle body and any one of the lug structures.

[0019] The lug structure, the battery tray, the battery pack and the vehicle provided in the present application have the following advantages: the lug body and the sleeve of the lug structure are integrally formed, the assembly steps of the lug body and the sleeve are reduced, the assembly error of the lug body and the sleeve is reduced, the installation precision and consistency of the lug body and the sleeve are improved, the structural strength of the lug structure is improved, the reliability of the lug structure is improved, the processing cost of the lug structure is lower in mass production, and the production efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0020] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application.

[0021] Figure 1 The structure diagram of the lug structure provided in the present application Figure 1 ;

[0022] Figure 2 The structure diagram of another view of Figure 1 ;

[0023] Figure 3 The structure diagram of still another view of Figure 1 ;

[0024] Figure 4 The sectional view of A-A in Figure 3 ;

[0025] Figure 5 The structure diagram of the lug structure provided in the present application Figure 2 ;

[0026] Figure 6 is a structural schematic view of another perspective of Figure 5

[0027] Figure 7 is a structural schematic view of still another perspective of Figure 5

[0028] Figure 8 is a sectional view of B-B in Figure 7

[0029] Figure 9 is a structural schematic view of a battery tray provided by an embodiment of the present application;

[0030] Figure 10 is an exploded schematic view of a battery tray in Figure 9

[0031] Figure 11 is a structural schematic view of a tray body in Figure 9

[0032] Figure 12 is a structural schematic view of a cold plate in Figure 9

[0033] Figure 13 is an enlarged schematic view of C in Figure 12

[0034] By means of the above-described drawings, the explicit embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and written descriptions are not intended to limit the scope of the inventive concept by any means, but to illustrate the concept of the present application to those skilled in the art by means of reference to specific embodiments.

[0035] Explanation of Reference Signs:

[0036] 100 - ear structure; 101 - plane of symmetry

[0037] 110 - ear body; 111 - connecting surface; 112 - first side surface; 113 - second side surface; 114 - third side surface; 115 - fourth side surface; 116 - weight-reducing portion; 1161 - first weight-reducing hole; 1162 - second weight-reducing hole; 1163 - third weight-reducing hole; 1164 - fourth weight-reducing hole; 1165 - fifth weight-reducing hole; 117 - first surface; 118 - second surface

[0038] 120 - sleeve; 121 - mounting hole

[0039] 130 - welding portion

[0040] 140 - positioning member; 141 - positioning hole ​​​​​​​

[0041] 200 - tray body; 201 - mounting surface; 210 - frame; 211 - left frame; 212 - right frame; 213 - front frame; 214 - rear frame; 215 - accommodating groove; 220 - cross beam; 230 - mounting bracket; 240 - water cooling inlet and outlet;

[0042] 300 - cold plate; 310 - flow channel plate; 320 - uniform temperature plate; 330 - weld. DETAILED DESCRIPTION

[0043] The exemplary embodiments will be described in detail below with reference to the drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary embodiments do not represent all implementations consistent with the present application. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present application as detailed in the appended claims.

[0044] In the prior art, a battery tray includes a tray body, a lug and a sleeve, the lug is connected on opposite sides of the tray body. The lug has a plug hole, the sleeve is inserted into the plug hole, and the sleeve is welded with the lug. The sleeve has a mounting hole, and a fastener is connected with the body of a vehicle through the mounting hole. However, the operation of connecting the lug and the sleeve is relatively complex, and the installation precision of the lug and the sleeve is low.

[0045] Therefore, based on this, the embodiments of the present application provide a lug structure, which is integrally formed by a lug body and a sleeve, reduces the assembly steps of the lug body and the sleeve, reduces the assembly error of the lug body and the sleeve, improves the installation precision and consistency of the lug body and the sleeve, improves the structural strength of the lug structure, improves the reliability of the lug structure, and has a lower processing cost and a higher production efficiency in mass production.

[0046] The embodiments of the present application will be described below with reference to the drawings.

[0047] Reference Figures 1 to 9 The lug structure 100 provided by the embodiments of the present application includes a lug body 110 and a sleeve 120, and the lug body 110 is used to connect with a tray body 200 of a battery tray. The sleeve 120 is arranged on the lug body 110, and the lug body 110 is integrally formed with the sleeve 120.

[0048] The lifting lug structure 100 provided by the embodiment of the present application is integrally formed by the lifting lug body 110 and the sleeve 120, thereby reducing the assembly steps of the lifting lug body 110 and the sleeve 120, reducing the assembly error of the lifting lug body 110 and the sleeve 120, improving the installation precision and consistency of the lifting lug body 110 and the sleeve 120, improving the structural strength of the lifting lug structure 100, and improving the reliability of the lifting lug structure 100. In mass production, the processing cost of the lifting lug structure 100 is relatively low, and the production efficiency is relatively high.

[0049] In the specific implementation, the lifting lug body 110 and the sleeve 120 are integrally formed by pressure casting.

[0050] The lifting lug structure 100 is a pressure casting, and the pressure casting generally has high strength and rigidity.

[0051] Specifically, the plurality of lifting lug structures 100 are arranged on the tray body 200 of the battery tray in a spaced manner.

[0052] The present application adopts a single pressure casting lifting lug structure 100, while the prior art generally adopts a whole extruded profile lifting lug or a single extruded lifting lug. The whole extruded profile lifting lug, the single extruded lifting lug and the single pressure casting lifting lug structure 100 of the present application are respectively assembled on the battery tray, and then the first-order modal of the battery pack is compared by simulation. Table 1 shows the 3σ stress of some components of the battery pack under random vibration conditions. As shown in Table 1, the first-order modal of the battery pack using the whole extruded profile lifting lug is 66.06 Hz, the first-order modal of the battery pack using the single extruded lifting lug is 64.24 Hz, and the first-order modal of the battery pack using the single pressure casting lifting lug is 71.75 Hz. Therefore, compared with the whole extruded profile lifting lug, the first-order modal of the battery pack using the lifting lug structure 100 of the present application is improved by 5.69 Hz, and compared with the single extruded lifting lug, the first-order modal of the battery pack is improved by 7.51 Hz, thereby indicating that the lifting lug structure 100 of the present application can improve the overall stiffness of the battery pack.

[0053] As shown in Table 1, compared with the whole extruded profile lifting lug and the single extruded lifting lug, the 3σ stress of the tray, the tray weld, the cold plate, the cold plate weld and the cell shell of the battery pack is smaller when the lifting lug structure 100 of the present application is used, indicating that the lifting lug structure 100 of the present application has obvious improvement on the fatigue durability of the overall battery pack.

[0054] Table 1: 3σ stress of some components of the battery pack under random vibration conditions

[0055]

[0056] In addition, compared with the whole extruded lug, the material utilization of the lug structure 100 is higher, the total weight of each lug structure 100 is lighter, and the manufacturing cost is lower, thereby achieving weight reduction and cost reduction.

[0057] In a specific implementation, the lug structure 100 has a symmetry plane 101, and the lug structure 100 is symmetrical relative to the symmetry plane 101.

[0058] The symmetry plane 101 is as shown in the dashed box. Figure 1 The lug structure 100 is a symmetrical piece, and the pressure distribution on the symmetrical piece is more uniform, which helps to reduce local stress concentration, thereby reducing the risk of fatigue and damage of the lug structure 100, and enabling the lug structure 100 to have a longer fatigue life. The symmetrical piece also has good balance and stability, so that the lug structure 100 is not easy to deform when bearing pressure.

[0059] Referring to Figure 3 and Figure 7 In a specific implementation, the lug body 110 has a connecting surface 111, and the connecting surface 111 is used to connect with the tray body 200.

[0060] For example, the connecting surface 111 is a plane, so as to facilitate the connection between the connecting surface 111 and the tray body 200. Further, the connecting surface 111 can be a rectangular surface.

[0061] Referring to Figure 1 and Figure 5 In some embodiments, the connecting surface 111 is provided with a welding portion 130, and the welding portion 130 is used to be welded with the tray body 200.

[0062] The welding strength is high, the lug body 110 is welded with the tray body 200 of the battery tray, so that the connection strength between the lug structure 100 and the tray body 200 is high.

[0063] Referring to Figure 2 , Figure 3 , Figure 6 and Figure 7 In some embodiments, the lug body 110 includes a first side surface 112, a second side surface 113 and a third side surface 114 which are sequentially arranged, and the first side surface 112 and the third side surface 114 are inclined toward the connecting surface 111.

[0064] The second side surface 113 is located between the first side surface 112 and the third side surface 114, and connects the first side surface 112 and the third side surface 114. The side of the first side surface 112 away from the second side surface 113 is inclined toward the connecting surface 111, and the side of the third side surface 114 away from the second side surface 113 is inclined toward the connecting surface 111.

[0065] Specifically, the first side surface 112 and the third side surface 114 are symmetrical relative to the symmetry plane 101, and the second side surface 113 is also symmetrical relative to the symmetry plane 101, and the second side surface 113 intersects the symmetry plane 101.

[0066] With reference to Figure 3 and Figure 7 In a specific implementation, the first side surface 112, the second side surface 113, and the third side surface 114 are orthogonal to the connecting surface 111.

[0067] Specifically, the connecting surface 111 comprises a first segment, a second segment, and a third segment arranged in sequence. The orthogonal projection of the first side surface 112 on the connecting surface 111 coincides with the first segment, the orthogonal projection of the second side surface 113 on the connecting surface 111 coincides with the second segment, and the orthogonal projection of the third side surface 114 on the connecting surface 111 coincides with the third segment. In this way, the material used by the lug body 110 can be reduced, and the manufacturing cost of the lug body 110 can be reduced.

[0068] With reference to Figure 3 and Figure 7 In a specific implementation, the sleeve 120 has a mounting hole 121 for connecting with the vehicle body, and the axis of the mounting hole 121 is located on the symmetry plane 101, and the mounting hole 121 is close to the second side surface 113.

[0069] The fastener is inserted into the mounting hole 121 and connected with the vehicle body, so as to fix the lug structure 100 on the vehicle body. For example, the fastener is a screw or a bolt, and the mounting hole 121 is matched with the fastener.

[0070] The axis of the mounting hole 121 is located on the symmetry plane 101, so that the mounting hole 121 is symmetrical relative to the symmetry plane 101, to ensure the stability and reliability of the lug structure 100.

[0071] The mounting hole 121 is located between the connecting surface 111 and the second side surface 113, and the mounting hole 121 is close to the second side surface 113, to reduce the material used between the mounting hole 121 and the second side surface 113, so as to reduce the manufacturing cost of the lug structure 100. At the same time, the mounting hole 121 and the connecting surface 111 have a certain distance, so that the vehicle body connected with the mounting hole 121 and the tray body 200 connected with the connecting surface 111 have a certain distance, so as to prevent the vehicle body from interfering with the tray body 200 to affect the connection between the mounting hole 121 and the vehicle body, and prevent the vehicle body from being close to the tray body 200 to block the exhaust hole of the tray body 200.

[0072] Exemplarily, the mounting hole 121 is a circular hole, and the second side surface 113 is an arc surface. By setting the second side surface 113 as an arc surface, the thickness between the second side surface 113 and the inner wall of the mounting hole 121 is relatively uniform, so that the local stress distribution on the lug body 110 is relatively uniform. At the same time, compared with the second side surface 113 being a rectangular surface or other shape, setting the second side surface 113 as an arc surface can further reduce the material used between the mounting hole 121 and the second side surface 113, and reduce the manufacturing cost of the lug structure 100.

[0073] Further, the second side surface 113 is smoothly transitioned with the first side surface 112 and the third side surface 114, and the lug body 110 is a fan shape.

[0074] In some embodiments, the lug body 110 has at least two weight reduction portions 116, and the weight reduction portions 116 are symmetrical with respect to the symmetry plane 101 of the lug structure 100.

[0075] Among them, by setting the weight reduction portion 116 on the lug body 110, the weight of the lug body 110 is reduced, so that the weight of the battery tray is reduced, which is beneficial to improve the energy density of the battery pack. At the same time, the material required for manufacturing the lug body 110 can be reduced, so that the manufacturing cost of the lug structure 100 can be reduced.

[0076] The lug structure 100 is connected with the tray body 200, and the tray body 200 is used to place a battery cell group. When the lug structure 100 is connected with the vehicle body, the lug structure 100 will be subjected to a bending moment load due to the gravity of the battery cell group. According to the force transmission path of the lug structure 100, the lug body 110 is topologically optimized to be a fan shape, and the weight reduction portion 116 is arranged on the lug body 110 at a small force transmission area to remove part of the material, so that the stiffness of the lug body 110 can be improved, the overall modal of the battery pack is improved, and the fatigue durability of the battery pack is improved.

[0077] Exemplarily, the weight reduction portion 116 is located between the mounting hole 121 and the connecting surface 111. The weight reduction portion 116 can be a through hole or a groove arranged on the lug body 110.

[0078] Specifically, the weight reduction portion 116 includes a weight reduction hole, and the weight reduction hole is a through hole penetrating through the lug body 110 along the thickness direction of the lug body 110.

[0079] The lug body 110 has opposite first and second surfaces 117, 118, the connecting surface 111 is connected between the first and second surfaces 117, 118, and the connecting surface 111 is perpendicular to the first and second surfaces 117, 118. The thickness direction of the lug body 110 is the arrangement direction of the first and second surfaces 117, 118, and the weight-reducing hole penetrates the first and second surfaces 117, 118.

[0080] Further, the axis of the mounting hole 121 is perpendicular to the first and second surfaces 117, 118.

[0081] Specifically, the first, second, and third side surfaces 112, 113, 114 are all located between the first and second surfaces 117, 118, and are all perpendicular to the first and second surfaces 117, 118.

[0082] Referring to Figures 1 to 4 The lug structure 100 provided by the embodiment of the present application has two first weight-reducing holes 1161 on the lug body 110, one of which is located between the connecting surface 111 and the first side surface 112, and the other of which is located between the connecting surface 111 and the third side surface 114.

[0083] Specifically, the orthographic projections of the first weight-reducing holes 1161 on the connecting surface 111 are located on the first and third sections, respectively.

[0084] In some embodiments, the angle between the plane in which the first side surface 112 is located and the plane in which the third side surface 114 is located is shown by a in Figure 3 The angle a between the plane in which the first side surface 112 is located and the plane in which the third side surface 114 is located is greater than or equal to 90° and less than or equal to 120°.

[0085] In some embodiments, the connecting surface 111 is a rectangular surface, the length of the connecting surface 111 is shown by X1 in Figure 3 , the height of the connecting surface 111 is shown by X2 in Figure 3 , and the ratio of the length X1 of the connecting surface 111 to the height X2 of the connecting surface 111 is 3-5.

[0086] The height of the lug body 110 is the same as the height of the connecting surface 111, the height of the lug body 110 is shown by X2 in Figure 4 , the height of the part of the sleeve 120 extending out of the lug body 110 is shown by X3 in Figure 4 , and the ratio of the height X2 of the lug body 110 to the height X3 of the part of the sleeve 120 extending out of the lug body 110 is 1-2.5.

[0087] For example, the length X1 of the connecting surface 111 can be 120mm-150mm, and the height X2 of the connecting surface 111 can be 30mm-40mm. The height X3 of the portion of the sleeve 120 extending out of the lifting lug body 110 can be 16mm-30mm.

[0088] In a specific implementation, the lug body 110 also includes two fourth side surfaces 115, one of which connects the first side surface 112 and the connecting surface 111, and the other fourth side surface 115 connects the third side surface 114 and the connecting surface 111.

[0089] The fourth side 115 is perpendicular to the connecting surface 111, so as to increase the strength of the vertical weld between the connecting surface 111 and the pallet body 200 when the connecting surface 111 is welded to the pallet body 200, thereby increasing the welding strength between the lifting lug structure 100 and the pallet body 200.

[0090] The length of the fourth side is 115 as follows Figure 3 As shown in X4, the maximum distance between the second side surface 113 and the connecting surface 111 is as follows: Figure 3 As shown in X5, the ratio of the maximum distance X5 between the second side 113 and the connecting surface 111 to the length X4 of the fourth side 115 is 3-6.5.

[0091] For example, the length X4 of the fourth side 115 can be 10mm-15mm, and the maximum distance X5 between the second side 113 and the connecting surface 111 can be 45mm-65mm.

[0092] The second side 113 is symmetrical with respect to the plane of symmetry 101 of the lug structure 100. The maximum distance between the second side 113 and the connecting surface 111 refers to the distance between the line of intersection of the second side 113 and the plane of symmetry 101 and the connecting surface 111. The length of the fourth side 115 refers to the distance between the side of the fourth side 115 away from the connecting surface 111 and the connecting surface 111.

[0093] In some embodiments, the first weight-reducing hole 1161 is approximately triangular. The sidewall of the first weight-reducing hole 1161 near the connecting surface 111 is parallel to the connecting surface 111, and the sidewall of the first weight-reducing hole 1161 near the first side surface 112 is parallel to the first side surface 112. In this way, the thickness of the lifting lug body 110 is more uniform, thereby making the stress more evenly distributed on the lifting lug body 110, reducing stress concentration, and thus reducing the risk of local failure or damage to the lifting lug body 110.

[0094] The distance between the side wall of the first lightening hole 1161 close to the connecting surface 111 and the connecting surface 111 is greater than or equal to the minimum preset thickness, so as to ensure the strength, stability and reliability of the lug structure 100. Similarly, the distance between the side wall of the first lightening hole 1161 close to the first side surface 112 and the first side surface 112 is greater than or equal to the minimum preset thickness, or the distance between the side wall of the first lightening hole 1161 close to the third side surface 114 and the third side surface 114 is greater than or equal to the minimum preset thickness. For example, the minimum preset thickness can be 4 mm.

[0095] In a specific implementation, the angle between the plane where the side wall of the first lightening hole 1161 close to the connecting surface 111 is located and the plane where the side wall of the first lightening hole 1161 close to the first side surface 112 is located is shown as b in FIG. 1B, and the angle b is greater than or equal to 30° and less than or equal to 45°. Figure 3

[0096] Further, the angle between the plane where the first side surface 112 is located and the plane where the connecting surface 111 is located is equal to the angle between the plane where the third side surface 114 is located and the plane where the connecting surface 111 is located, and both are 30°-45°. The angle between the plane where the first side surface 112 is located and the plane where the third side surface is located is 90°-120°.

[0097] In a specific implementation, the first lightening hole 1161 is approximately a right triangle, and the side wall of the first lightening hole 1161 close to the first side surface 112 or the side wall of the first lightening hole 1161 close to the third side surface 114 is the hypotenuse.

[0098] For example, the two adjacent side walls of the first lightening hole 1161 are connected by an arc-shaped chamfer.

[0099] In some embodiments, the first lightening hole 1161 is two, and the distance between the two first lightening holes 1161 is shown as X6 in FIG. 1B, and the ratio of the distance X6 between the two first lightening holes 1161 to the length X1 of the connecting surface 111 is 3-5. For example, the distance X6 between the two first lightening holes 1161 can be 50-60 mm. Figure 3

[0100] In some embodiments, the lug body 110 further has at least two second lightening holes 1162, the second lightening hole 1162 is located between the mounting hole 121 and the connecting surface 111, and the second lightening hole 1162 is located between the two first lightening holes 1161 which are opposite to each other.

[0101] Among them, at least two second lightening holes 1162 are arranged to further reduce the weight of the lug body 110.

[0102] ​​For example, the second lightening hole 1162 is arranged on the second section.

[0103] In a specific implementation, the side wall of the second lightening hole 1162 close to the connecting surface 111 is parallel to the connecting surface 111, and the distance between the side wall of the second lightening hole 1162 close to the connecting surface 111 and the connecting surface 111 is greater than or equal to the minimum preset thickness.

[0104] The second lightening hole 1162 is a right triangle hole, the hypotenuse of the second lightening hole 1162 faces the mounting hole 121, and the minimum distance between the hypotenuse of the second lightening hole 1162 and the hole wall of the mounting hole 121 is greater than or equal to the minimum preset thickness, so as to ensure the stability and reliability of the lifting lug structure 100. The minimum preset thickness can be adaptively set according to actual requirements. For example, the minimum preset thickness can be 4 mm.

[0105] One of the right angles of the second lightening hole 1162 is parallel to the connecting surface 111, and the other right angle is close to the first lightening hole 1161, and the distance between the right angle and the first lightening hole 1161 is greater than or equal to the minimum preset thickness.

[0106] With reference to Figures 5 to 8 Another lifting lug structure 100 provided by the embodiment of the present application has two third lightening holes 1163, two fourth lightening holes 1164 and two fifth lightening holes 1165 on the lifting lug body 110, the two third lightening holes 1163 are symmetrical relative to the symmetry surface 101, the two fourth lightening holes 1164 are symmetrical relative to the symmetry surface 101, and the two fifth lightening holes 1165 are symmetrical relative to the symmetry surface 101.

[0107] For example, the third lightening hole 1163, the fourth lightening hole 1164 and the fifth lightening hole 1165 are arranged in sequence, the third lightening hole 1163 is close to the mounting hole 121, and the fifth lightening hole 1165 is close to the connecting surface 111.

[0108] One of the third lightening holes is close to the first side surface 112, and the other third lightening hole 1163 is close to the third side surface 114. The third lightening hole 1163 close to the first side surface 112 is parallel to the side wall of the first side surface 112 relative to the first side surface 112, and the distance between the side wall and the first side surface 112 is greater than or equal to the minimum preset thickness. The side wall of the third lightening hole 1163 away from the first side surface 112 is parallel to the symmetry surface 101. Similarly, the third lightening hole 1163 close to the third side surface 114 is parallel to the side wall of the third side surface 114 relative to the third side surface 114, and the distance between the side wall and the third side surface 114 is greater than or equal to the minimum preset thickness. The side wall of the third lightening hole 1163 away from the third side surface 114 is parallel to the symmetry surface 101.

[0109] The side wall of the third lightening hole 1163 close to the mounting hole 121 and the side wall of the third lightening hole 1163 away from the mounting hole 121 are both part of a cylinder, and the axis of the side wall of the third lightening hole 1163 close to the mounting hole 121 and the axis of the side wall of the third lightening hole 1163 away from the mounting hole 121 coincide with the axis of the mounting hole 121. For example, the radius of the side wall of the third lightening hole 1163 away from the mounting hole 121 is denoted by R in Figure 7 , and the radius R can be 55 mm.

[0110] For example, the length of the connecting surface 111 is denoted by L1 in Figure 7 , and the length L1 of the connecting surface 111 can be 122 mm. The distance between the axis of the mounting hole 121 and the connecting surface 111 is denoted by L2 in Figure 7 , and the distance L2 between the axis of the mounting hole 121 and the connecting surface 111 can be 96.5 mm. The height of the ear body 110 is denoted by L3 in Figure 8 , and the height L3 of the ear body 110 can be 50 mm. The height of the part of the sleeve 120 extending out of the ear body 110 is denoted by L4 in Figure 8 , and the height L4 of the part of the sleeve 120 extending out of the ear body 110 can be 53 mm.

[0111] The side wall of the fourth lightening hole 1164 close to the first side surface 112 is parallel to the first side surface 112, and the side wall of the fourth lightening hole 1164 close to the third side surface 114 is parallel to the third side surface 114. The side wall of the fourth lightening hole 1164 close to the third lightening hole 1163 is part of a cylinder, and its axis coincides with the axis of the mounting hole 121.

[0112] The fifth lightening hole 1165 is a right triangle hole, the side wall of the fifth lightening hole 1165 close to the connecting surface 111 is parallel to the connecting surface 111, the side wall of the fifth lightening hole 1165 close to the symmetry plane 101 is parallel to the symmetry plane 101, and the hypotenuse of the fifth lightening hole 1165 is close to the fourth lightening hole 1164 and parallel to the part of the side wall of the fourth lightening hole 1164.

[0113] In some embodiments, the ear structure 100 further comprises a positioning member 140 connected to the first side surface 112 or the third side surface 114, and the positioning member 140 is provided with a positioning hole 141, and the ear structure 100 is positioned through the positioning hole 141 when the ear structure 100 is installed.

[0114] Referring to Figure 9 , Figure 10 , Figure 11 and Figure 12On the basis of the above-mentioned embodiments, the battery tray provided by the embodiments of the present application comprises a tray body 200 and a plurality of lug structures 100 arranged on the tray body 200, and each lug structure 100 is arranged at intervals on at least part of the circumferential side of the tray body 200.

[0115] The specific structure of the lug structure 100 has been described in detail in the above-mentioned embodiments, and will not be described again here.

[0116] For example, the circumferential side of the tray body 200 has at least two mounting surfaces 201, the mounting surfaces 201 are planes, and the lug structure 100 is welded on the mounting surfaces 201. By arranging the mounting surfaces 201 on the tray body 200, the lug structure 100 is welded with the tray body 200, and at the same time, the lug structure 100 can be installed at any position on the mounting surfaces 201 according to actual installation requirements. Therefore, the applicability of the lug structure 100 can be improved, the design change caused by the change of the position of the lug structure 100 can be reduced, and the research and development cost of the lug structure 100 is reduced.

[0117] Specifically, the tray body 200 comprises a frame 210, a cross beam 220, a mounting bracket 230 and a water cooling inlet and outlet 240. The frame 210 comprises a left frame 211, a right frame 212, a front frame 213 and a rear frame 214, which jointly enclose a containing groove 215 for containing the battery cell group. The left frame 211 and the right frame 212 are parallel to each other, the front frame 213 and the rear frame 214 are parallel to each other, the left frame 211 is welded with the front frame 213 and the rear frame 214, and the right frame 212 is welded with the front frame 213 and the rear frame 214. At least two of the left frame 211, the right frame 212, the front frame 213 and the rear frame 214 have mounting surfaces 201.

[0118] For example, the mounting surfaces 201 can be two, and the two mounting surfaces 201 are respectively a side of the left frame 211 away from the right frame 212 and a side of the right frame 212 away from the left frame 211. The connecting surface 111 of the lug body 110 of the lug structure 100 is welded with the mounting surface 201. Specifically, the mounting surface 201 extends along a set direction, and a plurality of lug structures 100 are sequentially and intervally welded on the mounting surface 201 along the set direction. For example, the set direction can be the length direction of the tray body 200.

[0119] The cross beam 220 is arranged in the containing groove 215, and the cross beam 220 is parallel to the front frame 213 and the rear frame 214. The containing groove 215 is divided into at least two sub-containing grooves by the cross beam 220, and the sub-containing grooves are used for containing the battery cell group.

[0120] The mounting bracket 230 is located in the accommodating groove 215, and the mounting bracket 230 is connected with the front frame 213 and the cross beam 220 close to the front frame 213, and the mounting bracket 230 is used for mounting a distribution box of a battery pack. For example, the mounting bracket 230 is welded with the front frame 213 and the cross beam 220 close to the front frame 213.

[0121] The water cooling inlet and outlet 240 is located outside the accommodating groove 215, and the water cooling inlet and outlet 240 is connected with the front frame 213. For example, the water cooling inlet and outlet 240 is welded with the front frame 213.

[0122] Referring to Figure 9 , Figure 12 and Figure 13 , in a specific implementation, the battery tray further includes a cold plate 300, the cold plate 300 includes a flow channel plate 310 and a uniform temperature plate 320, and the flow channel plate 310 and the uniform temperature plate 320 are welded. The cold plate 300 is welded with the tray body 200.

[0123] For example, the flow channel plate 310 covers the uniform temperature plate 320, and the flow channel plate 310 and the uniform temperature plate 320 are connected by brazing.

[0124] Specifically, the uniform temperature plate 320 has a weld seam 330, and the weld seam 330 is welded with the tray body 200. For example, the weld seam 330 is connected with the tray body 200 by friction stir welding.

[0125] The battery tray provided in the embodiment of the present application is spaced apart from at least part of the circumferential side of the tray body 200 by the plurality of lug structures 100, and the single lug structure 100 is integrally formed, which reduces the material cost and process difficulty of the lug structure 100 compared with the extrusion forming of the tray lug in the prior art. The lug structure 100 can be welded on any circumferential side of the tray body 200, thereby improving the applicability of the lug structure 100 and realizing the generalization of the lug structure 100.

[0126] On the basis of the above-mentioned embodiment, the embodiment of the present application provides a battery pack, which includes a battery cell group and a battery tray, and the battery cell group is located on the battery tray.

[0127] On the basis of the above-mentioned embodiment, the embodiment of the present application provides a vehicle, which includes a vehicle body and the lug structure 100 described above connected with the vehicle body.

[0128] For example, the sleeve 120 of the lug structure 100 can be connected with the vehicle body by a bolt.

[0129] The terms "first", "second", and the like in the description and in the claims of the present application and the above drawings merely mean different instances or other terminology conveying a similar meaning are used in order to distinguish a certain instance, object, or the like from another; it is thus understood that the data thus distinguished can be interchanged where appropriate to the embodiments of the present application described herein. Furthermore, the terms "comprising" and "including" and any of their derivatives, are intended to be construed as encompassing not only the listed items, but also others.

[0130] In the embodiments of the present application, the terms "upper", "lower", "inner", "middle", "outer", "front", "back", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These terms are mainly used to better describe the present application and its embodiments, and are not intended to limit the indicated devices, elements or components to have a specific orientation, or to be constructed and operated in a specific orientation. In addition, in addition to indicating the orientation or positional relationship, the above-mentioned terms can also be used to indicate other meanings, for example, the term "upper" can also be used to indicate a certain dependent relationship or connection relationship in some cases. For those skilled in the art, the specific meanings of these terms in the embodiments of the present application can be understood according to the specific circumstances.

[0131] In addition, the terms "set", "connected", "fixed" should be broadly understood. For example, "connected" can be fixed connection, detachable connection, or integral structure; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection through an intermediate medium, or internal communication between two devices, elements or components. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0132] Unless otherwise specified, the term "a plurality of" means two or more.

[0133] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. The present application is intended to cover any variations, uses, or adaptations of the application following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice in the art to which the application pertains. The specification and examples are to be regarded as exemplary only, and the true scope of the application is to be determined solely by the appended claims.

Claims

1. A lifting lug structure, characterized in that, include: A lifting lug body (110) is used to connect to the tray body (200) of the battery tray; A sleeve (120) is disposed on the lug body (110); The lug body (110) and the sleeve (120) are integrally formed.

2. The lifting lug structure according to claim 1, characterized in that, The lug structure (100) has a plane of symmetry (101), and the lug structure (100) is symmetrical with respect to the plane of symmetry (101).

3. The lifting lug structure according to claim 1, characterized in that, The lug body (110) has a connecting surface (111) for connecting with the tray body (200).

4. The lifting lug structure according to claim 3, characterized in that, The lug body (110) includes a first side (112), a second side (113), and a third side (114) arranged sequentially. The first side (112) and the third side (114) are inclined toward the connecting surface (111). The orthographic projections of the first side (112), the second side (113), and the third side (114) on the connecting surface (111) are located on the connecting surface (111). The first side (112) and the third side (114) are symmetrical with respect to the symmetry plane (101) of the lug structure (100).

5. The lifting lug structure according to claim 4, characterized in that, The lug body (110) also includes two fourth side surfaces (115), one of which connects the connecting surface (111) to the first side surface (112), and the other fourth side surface (115) connects the connecting surface (111) to the third side surface (114).

6. The lifting lug structure according to claim 4, characterized in that, The sleeve (120) has a mounting hole (121) for connecting to the vehicle body. The axis of the mounting hole (121) is located on the symmetry plane (101), and the mounting hole (121) is close to the second side surface (113).

7. The lifting lug structure according to claim 1, characterized in that, The lug body (110) has at least two weight-reducing parts (116), which are symmetrical with respect to the plane of symmetry (101) of the lug structure (100).

8. A battery tray, characterized in that, Includes a pallet body (200) and a plurality of lug structures (100) as described in any one of claims 1-7 disposed on the pallet body (200); Each of the aforementioned lug structures (100) is spaced apart and disposed on at least a portion of the periphery of the tray body (200).

9. A battery pack, characterized in that, It includes a battery cell assembly and the battery tray of claim 8, wherein the battery cell assembly is located on the battery tray.

10. A vehicle, characterized in that, Includes the vehicle body and the lug structure (100) of any one of claims 1-7 connected to the vehicle body.

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