Cover plate assembly, battery pack and vehicle

Abstract

A cover plate assembly, a battery pack and a vehicle, the cover plate assembly comprises a cover plate and a reinforcing member, the reinforcing member comprises a reinforcing plate and a reinforcing plate, the reinforcing plate is arranged on one side of the cover plate in the thickness direction, the reinforcing plate is at least partially arranged on the reinforcing plate, and a part of the reinforcing member extends in a first direction, partial structure of the reinforcing component extends in the second direction, and the first direction and the second direction intersect and are both perpendicular to the thickness direction of the cover plate. The reinforcing component can resist bending deformation of the cover plate in the first direction and the second direction and torsional deformation of the cover plate in the first direction and the second direction, the strength and torsional rigidity of the cover plate can be improved, and then the reliability of the battery pack and the vehicle is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a cover plate assembly, a battery pack and a vehicle. Background Art

[0002] Currently, when the battery pack is in use, the cover of the battery pack needs to bear part of the force, but in the current solution, the strength and torsional stiffness of the cover itself are relatively poor. Utility Model Content

[0003] The purpose of the utility model is to provide a cover plate assembly, a battery pack and a vehicle, so as to solve the problem that the strength and torsional rigidity of the cover plate itself are both poor.

[0004] In order to achieve the purpose of the utility model, the utility model provides the following technical solutions:

[0005] In a first aspect, the utility model provides a cover plate assembly, comprising: a cover plate; a reinforcement member, comprising a reinforcement plate and a reinforcing plate, wherein the reinforcement plate is arranged on one side of the thickness direction of the cover plate, and the reinforcing plate is at least partially arranged on the reinforcement plate, a part of the structure of the reinforcement member extends along a first direction, and a part of the structure of the reinforcement member extends along a second direction, and the first direction and the second direction intersect and are both perpendicular to the thickness direction of the cover plate.

[0006] In one embodiment, the reinforcing plate, the strengthening plate and the cover plate are fixed by one welding.

[0007] In one embodiment, the reinforcing plate includes a first plate and a second plate connected to each other, the first plate extends along the first direction, and the second plate extends along the second direction.

[0008] In one embodiment, the reinforcement plate further includes a third plate and a fourth plate connected to each other, wherein the third plate extends along the first direction, the fourth plate extends along the second direction, the third plate is also connected to the second plate, and the fourth plate is also connected to the first plate, so that the reinforcement plate forms an annular component.

[0009] In one embodiment, the first plate, the second plate, the third plate and the fourth plate are an integrally formed structure.

[0010] In one embodiment, the reinforcing plate includes a fifth plate and a sixth plate, the fifth plate extends along the first direction and is stacked on the first plate, and the sixth plate extends along the second direction and is stacked on the second plate.

[0011] In one embodiment, when the reinforcement plate also includes the third plate and the fourth plate, the reinforcement plate also includes a seventh plate and an eighth plate, the seventh plate extends along the first direction and is stacked on the third plate, and the eighth plate extends along the second direction and is stacked on the fourth plate, so that the reinforcement plate forms an annular component.

[0012] In one embodiment, at least two adjacent plates among the fifth plate, the sixth plate, the seventh plate and the eighth plate have at least partial regions overlapping.

[0013] In one embodiment, part of the fifth plate is fixedly connected to the second plate, and / or part of the seventh plate is fixedly connected to the second plate, and / or both ends of the eighth plate are respectively fixedly connected to the first plate and the third plate.

[0014] In one embodiment, a middle portion of the reinforcing plate protrudes toward a side facing away from the cover plate.

[0015] In one embodiment, the reinforcing member is provided with a through hole, and the cover plate is provided with a mounting hole, and the mounting hole is directly opposite to the through hole.

[0016] In a second aspect, the utility model provides a battery pack, comprising a tray, a battery cell and a cover assembly as described in any one of the various embodiments of the first aspect, wherein the tray and the cover assembly enclose a receiving cavity, and the battery cell is received in the receiving cavity.

[0017] In one embodiment, the reinforcing member is disposed on a side of the cover plate facing away from the tray.

[0018] In a third aspect, the utility model provides a vehicle, comprising a mounting beam and a battery pack of the utility model, wherein the cover plate assembly is connected and fixed to the mounting beam.

[0019] The cover plate assembly of the utility model is provided with a reinforcing member, wherein part of the structure of the reinforcing member extends along a first direction, and part of the structure extends along a second direction, the first direction and the second direction intersect and are both perpendicular to the thickness direction of the cover plate. After the cover plate assembly is installed to the mounting beam of the vehicle, the reinforcing member can resist bending deformation of the cover plate in the first direction and the second direction, and resist torsional deformation of the cover plate around the first direction and the second direction, thereby being able to improve the strength and torsional stiffness of the cover plate, and thereby improving the reliability of the battery pack and the vehicle. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a perspective view of a cover assembly of an embodiment;

[0022] Figure 2 is an exploded view of a cover plate assembly of an embodiment;

[0023] Figure 3 1 is a top view of a cover plate assembly according to an embodiment.

[0024] Description of reference numerals:

[0025] 10-cover plate, 11-first surface, 12-second surface, 13-mounting hole, 14-inspection window;

[0026] 20-reinforcement member, 21-reinforcement plate, 211-first plate, 212-second plate, 213-third plate, 214-fourth plate, 215-first through hole, 22-reinforcement plate, 221-fifth plate, 222-sixth plate, 223-seventh plate, 224-eighth plate, 225-second through hole, 226-avoidance;

[0027] 30-Copper busbar. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0029] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there can be a central component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there can be a central component at the same time.

[0030] Unless otherwise defined, all technical and scientific terms used in this utility model have the same meaning as those commonly understood by technicians in the technical field of this utility model. The terms used in the specification of this utility model are only for the purpose of describing specific embodiments and are not intended to limit this utility model. The term "and / or" used in this utility model includes any and all combinations of one or more related listed items.

[0031] In conjunction with the accompanying drawings, some embodiments of the present invention are described in detail below. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0032] An embodiment of the present invention provides a vehicle (not shown), comprising a mounting beam (not shown) and a battery pack (not shown) in an embodiment of the present invention, wherein a cover plate assembly of the battery pack is connected and fixed to the mounting beam.

[0033] Specifically, the vehicle can be a hybrid-powered vehicle or a pure electric-powered vehicle, without limitation. The vehicle has a mounting beam, which can be a crossbeam and / or a longitudinal beam of the vehicle, or other beam components, and its function is to install the battery pack. Specifically, the cover assembly of the battery pack is fixed to the mounting beam, and can be installed by any feasible method such as screwing, riveting, etc. After installation, the battery pack is located on the side of the mounting beam facing the ground, that is, the battery pack is suspended below the mounting beam.

[0034] By adopting the battery pack of the embodiment of the utility model, the battery pack is designed with a unique cover plate assembly structure, which can improve the strength and torsional rigidity of the cover plate assembly and improve the reliability of the battery pack and the vehicle.

[0035] An embodiment of the utility model provides a battery pack (not shown), including a tray (not shown), a battery cell (not shown) and a cover assembly in the embodiment of the utility model, wherein the tray and the cover assembly enclose a receiving cavity, and the battery cell is received in the receiving cavity.

[0036] There is no restriction on the specific structure of the tray and the battery cell, and the cover plate assembly and the tray can be connected and fixed by any feasible means such as screwing, riveting, etc.

[0037] The steps for installing the battery pack on the vehicle can be: 1. Install and fix the cover assembly to the mounting beam, and then install and fix the tray and battery cells to the cover assembly; 2. Install and fix the cover assembly to the tray, and then install and fix the entire battery pack to the mounting beam.

[0038] By adopting the special cover plate assembly of the embodiment of the utility model, the strength and torsional rigidity of the cover plate assembly can be improved, the reliability of the battery pack can be ensured, and the reliability of the vehicle can be improved.

[0039] Optional, reference Figure 1 and Figure 2 The reinforcing member 20 of the cover plate assembly is arranged on the side of the cover plate 10 away from the tray. In this way, the reinforcing member 20 is installed with the cover plate 10 on the outside, and can be installed with the cover plate 10 conveniently, and the reinforcing member 20 will not contact the battery cell in the accommodating cavity, avoiding affecting the safety of the battery cell.

[0040] Alternatively, the reinforcing member 20 may also be disposed on the side of the cover plate 10 facing the tray, that is, the reinforcing member 20 is accommodated in the accommodating cavity of the battery pack, which may also serve to enhance the strength and torsional stiffness of the cover plate assembly.

[0041] The cover plate assembly of the embodiment of the utility model is described in detail below.

[0042] refer to Figure 1 and Figure 2 , an embodiment of the utility model provides a cover plate assembly, including a cover plate 10 and a reinforcing member 20. For the convenience of explanation, a coordinate system XYZ is established, which is respectively a first direction X, a second direction Y and a third direction Z. The first direction X, the second direction Y and the third direction Z intersect each other, and further, they can be perpendicular to each other. Optionally, the first direction X is the length direction of the cover plate assembly, the second direction Y is the width direction of the cover plate assembly, and the third direction Z is the thickness direction of the cover plate assembly. Of course, the first direction X, the second direction Y and the third direction Z can also be other directions without limitation.

[0043] The cover plate 10 has a first surface 11 and a second surface 12 facing each other in the third direction Z. The first surface 11 is used to face the mounting beam of the vehicle, and the second surface 12 is used to connect with the tray of the battery pack. The first surface 11 can be roughly flat to facilitate installation with the mounting beam. Of course, the first surface 11 can also be a curved surface or a combination of a flat surface and a curved surface, etc., without limitation. The cover plate 10 can be made of aluminum alloy, alloy steel, etc., and has a certain strength and torsional rigidity.

[0044] The reinforcing member 20 is disposed on one side of the thickness direction of the cover plate 10, for example, on the first surface 11, and of course, can also be disposed on the second surface 12. Part of the reinforcing member 20 extends along the first direction X, and part of the reinforcing member 20 extends along the second direction Y. The first direction X and the second direction Y intersect and are both perpendicular to the thickness direction of the cover plate 10 (i.e., the third direction Z).

[0045] The specific structure of the reinforcing member 20 is not limited, and its overall shape can be a square frame, a cross, a U shape, etc. The reinforcing member 20 can be made of high-strength alloy steel, etc., without limitation, and has high strength and torsional rigidity.

[0046] The first direction X can be any direction, and the second direction Y can also be any direction. The angle between the first direction X and the second direction Y can be 60°-120°, specifically 60°, 90°, 120°, etc., without limitation. Taking the first surface 11 as a plane as an example, the first direction X and the second direction Y can be straight line directions parallel to the first surface 11. Optionally, the first direction X can be the length direction of the cover plate 10, and the second direction Y can be the width direction of the cover plate 10, and the first direction X and the second direction Y are perpendicular.

[0047] Most of the current battery packs simply adopt a cover plate 10 design without a reinforcement structure, resulting in poor strength and torsional rigidity of the cover plate 10. In the few designs of the cover plate 10 with a reinforcement structure, the reinforcement structure only extends in one direction, such as the first direction X of the present invention, and there is no structure extending in the second direction Y, which also leads to limited reinforcement effect on the strength and torsional rigidity of the cover plate 10, and the cover plate 10 is still at risk of damage under severe working conditions.

[0048] The cover plate assembly of the embodiment of the utility model is provided with a reinforcing member 20, part of the structure of the reinforcing member 20 extends along the first direction X, and part of the structure extends along the second direction Y, the first direction X and the second direction Y intersect and are both perpendicular to the thickness direction of the cover plate 10. After the cover plate assembly is installed to the mounting beam of the vehicle, the reinforcing member 20 can resist the bending deformation of the cover plate 10 in the first direction X and the second direction Y, and resist the torsional deformation of the cover plate 10 around the first direction X and the second direction Y, so as to improve the strength and torsional stiffness of the cover plate 10, thereby improving the reliability of the battery pack and the vehicle.

[0049] In one embodiment, reference Figure 1 and Figure 2 The reinforcing member 20 includes a reinforcing plate 21 and a reinforcing plate 22 . The reinforcing plate 21 is disposed on one side of the cover plate 10 in the thickness direction, such as the first surface 11 or the second surface 12 . The reinforcing plate 22 is at least partially disposed on the reinforcing plate 21 .

[0050] Both the reinforcing plate 21 and the reinforcing plate 22 may be roughly plate-shaped, and the plate surface is roughly parallel to the first surface 11, and the specific structure is not limited. The reinforcing plate 21 and the reinforcing plate 22 may both have a partial structure extending along the first direction X and a partial structure extending along the second direction Y; or, one of them may have a partial structure extending along the first direction X and a partial structure extending along the second direction Y, and the other may extend along the first direction X or the second direction Y; or, one of them may extend along the first direction X and the other may extend along the second direction Y. The reinforcing plate 21 and the reinforcing plate 22 may be made of high-strength alloy steel to provide sufficient strength and torsional rigidity. There is no limitation on the connection method between the reinforcing plate 21 and the reinforcing plate 22, and there is no limitation on the connection method between the two and the cover plate 10.

[0051] The reinforcing member 20 includes a reinforcing plate 21 and a reinforcing plate 22 . The plate-shaped member has a simple structure and can have a large contact area with the cover plate 10 , which has a good effect on strengthening the strength and torsional rigidity of the cover plate 10 .

[0052] Optionally, the reinforcing plate 21 and the reinforcing plate 22 are fixed to the cover plate 10 by one welding. Among them, there are multiple interconnected positions between the reinforcing plate 21 and the reinforcing plate 22, and welding is used to fix them at each connection position. When welding at each position, the reinforcing plate 21, the reinforcing plate 22 and the cover plate 10 are welded together. Compared with the method of first welding and fixing the reinforcing plate 21 and the reinforcing plate 22, and then welding and fixing them with the cover plate 10, one welding process is reduced, which can improve efficiency. When welding, the reinforcing plate 21 and the reinforcing plate 22 are first aligned with the cover plate 10, and then resistance welding can be used for spot welding. Spot welding is performed once at each position. After spot welding at multiple positions, the three can be fixed. Fixing by welding is simple to operate and does not require additional fasteners. Fixing three parts by welding at one time saves one welding process and improves efficiency.

[0053] In one embodiment, reference Figure 2 The reinforcing plate 21 includes a first plate 211 and a second plate 212 connected to each other. The first plate 211 extends along a first direction X, and the second plate 212 extends along a second direction Y.

[0054] The first plate 211 and the second plate 212 may be connected in any manner. The first plate 211 and the second plate 212 may be connected at their respective ends, or at an end of one of them connected to a position farther from the end of the other, or at a position farther from the ends of both, without limitation. Figure 2 As shown, the end surface of the first plate 211 in the first direction X is connected to the side surface of the second plate 212 facing the first plate 211, and the connection method can be welding or other methods, which are not limited.

[0055] After the first plate 211 and the second plate 212 are connected and fixed, the first plate 211 can resist the bending deformation of the cover plate 10 in the first direction X, and resist the torsional deformation around the second direction Y. The second plate 212 can resist the bending deformation of the cover plate 10 in the second direction Y, and resist the torsional deformation around the first direction X, thereby reinforcing the strength and torsional rigidity of the cover plate 10.

[0056] Optional, reference Figure 2The reinforcing plate 21 also includes a third plate 213 and a fourth plate 214 connected to each other. The third plate 213 extends along the first direction X, and the fourth plate 214 extends along the second direction Y. The third plate 213 is also connected to the second plate 212, and the fourth plate 214 is also connected to the first plate 211, so that the reinforcing plate 21 forms an annular component.

[0057] Similar to the first plate 211 and the second plate 212, the third plate 213 and the fourth plate 214 may also be connected in any manner, and the connection positions are similar, which will not be described in detail. Figure 2 As shown, the end face of the third plate 213 in the first direction X is connected to the side of the second plate 212 facing the second plate 212, the end face of the fourth plate 214 in the second direction Y is connected to the side of the first plate 211 facing the fourth plate 214, the end face of the other end of the second direction Y of the fourth plate 214 is connected to the side of the third plate 213 facing the fourth plate 214, and both ends of the fourth plate 214 are at a certain distance from the ends of the first plate 211 and the third plate 213 away from the second plate 212. The connection method can be welding or other methods without limitation.

[0058] It can be understood that the third plate 213 extends along the first direction X, and the overall extension direction may be substantially the first direction X, and may completely coincide with the first direction X or have a small tilt angle. The fourth plate 214 extends along the second direction Y, and the overall extension direction may be substantially the second direction Y, and may completely coincide with the second direction Y or have a small tilt angle, which is not specifically limited.

[0059] The third plate 213 and the fourth plate 214 are connected and fixed, and the annular component formed by connecting and fixing the first plate 211 and the second plate 212 can be a rectangular component, a square component, a parallelogram component or an ordinary quadrilateral component. The annular component has a better effect of reinforcing the strength and torsional stiffness of the cover plate 10.

[0060] Optionally, the first plate 211, the second plate 212, the third plate 213 and the fourth plate 214 are integrally formed. Specifically, the first plate 211, the second plate 212, the third plate 213 and the fourth plate 214 can be formed by stamping and shearing a large plate, or can be formed by casting, or can be formed by forging, etc., without limitation. The design of the integrally formed structure can improve the strength of the connection structure between each other and save a process of connection between each other.

[0061] By providing the above-mentioned reinforcing plate 21 , the strength and torsional rigidity of the cover plate 10 can be better strengthened.

[0062] In one embodiment, reference Figure 2The reinforcing plate 22 includes a fifth plate 221 and a sixth plate 222 . The fifth plate 221 extends along the first direction X and is stacked on the first plate 211 . The sixth plate 222 extends along the second direction Y and is stacked on the second plate 212 .

[0063] The fifth plate 221 and the sixth plate 222 may also be roughly plate-shaped, and the fifth plate 221 and the sixth plate 222 may be connected or not connected, without limitation. The fifth plate 221 and the first plate 211 may be in close contact, or there may be a certain gap, without limitation. The sixth plate 222 and the second plate 212 may be in close contact, or there may be a certain gap, without limitation. Optionally, the fifth plate 221, the first plate 211 and the cover plate 10 are fixed by one-time welding, and the sixth plate 222, the second plate 212 and the cover plate 10 are fixed by one-time welding.

[0064] In one embodiment, reference Figure 2 In the case where the reinforcing plate 21 further includes the third plate 213 and the fourth plate 214, the reinforcing plate 22 further includes the seventh plate 223 and the eighth plate 224. The seventh plate 223 extends along the first direction X and is stacked on the third plate 213, and the eighth plate 224 extends along the second direction Y and is stacked on the fourth plate 214, so that the reinforcing plate 22 forms an annular member.

[0065] The seventh plate 223 and the eighth plate 224 may also be roughly plate-shaped, and may or may not be connected, without limitation. The seventh plate 223 and the sixth plate 222, and the eighth plate 224 and the fifth plate 221 may also be connected or not connected, without limitation. The seventh plate 223 and the third plate 213 may be in close contact, or may have a certain gap, and the eighth plate 224 and the fourth plate 214 may be in close contact, or may have a certain gap, without limitation. Optionally, the seventh plate 223, the third plate 213 and the cover plate 10 are fixed by one-time welding, and the eighth plate 224, the fourth plate 214 and the cover plate 10 are fixed by one-time welding.

[0066] The above reinforcing plate 22 is provided to enhance the reinforcing effect of the reinforcing plate 21 on the strength and torsional rigidity of the cover plate 10 , thereby further improving reliability.

[0067] In one embodiment, reference Figure 2 , at least two adjacent plates among the fifth plate 221, the sixth plate 222, the seventh plate 223 and the eighth plate 224 have at least partial areas overlapping. In other words, a partial area of ​​one of the fifth plate 221, the sixth plate 222, the seventh plate 223 and the eighth plate 224 is closer to the cover plate 10, and a partial area of ​​another adjacent plate overlaps the plate. That is to say, in the orthographic projection on the first surface 11, at least two adjacent plates among the fifth plate 221, the sixth plate 222, the seventh plate 223 and the eighth plate 224 have partial areas overlapping, and there is no restriction on which plates have overlapping areas.

[0068] Such an arrangement can improve the connection stability between each plate of the reinforcing plate 22 , each plate of the reinforcement plate 21 , and the cover plate 10 .

[0069] In one embodiment, reference Figure 2 , part of the fifth plate 221 is fixedly connected to the second plate 212, and / or part of the seventh plate 223 is fixedly connected to the second plate 212, and / or both ends of the eighth plate 224 are fixedly connected to the first plate 211 and the third plate 213 respectively.

[0070] Optionally, the fifth plate 221, the first plate 211, the second plate 212 and the cover plate 10 are fixed by one welding, the sixth plate 222, the second plate 212 and the cover plate 10 are fixed by one welding, the seventh plate 223, the second plate 212, the third plate 213 and the cover plate 10 are fixed by one welding, and the eighth plate 224, the first plate 211, the third plate 213, the fourth plate 214 and the cover plate 10 are fixed by one welding.

[0071] Specifically, the fifth plate 221 is stacked on the first plate 211, and is fixed to the first plate 211 and the cover plate 10 by one-time welding at one or more positions. A partial area of ​​the fifth plate 221 is also located on the side of the second plate 212 facing away from the cover plate 10, and the partial area is fixed to the second plate 212 and the cover plate 10 by one-time welding at one or more positions.

[0072] The sixth plate 222 is stacked on the second plate 212 and is fixed to the second plate 212 and the cover plate 10 at one or more locations by welding.

[0073] The seventh plate 223 is stacked on the third plate 213, and is fixed to the third plate 213 and the cover plate 10 by one-time welding at one or more positions. A partial area of ​​the seventh plate 223 is also located on the side of the second plate 212 facing away from the cover plate 10, and the partial area is fixed to the second plate 212 and the cover plate 10 by one-time welding at one or more positions.

[0074] The eighth plate 224 is stacked on the fourth plate 214, and is fixed to the fourth plate 214 and the cover plate 10 by one-time welding at one or more positions. A part of the eighth plate 224 is located on the side of the third plate 213 facing away from the cover plate 10, and is fixed to the third plate 213 and the cover plate 10 by one-time welding at one or more positions. A part of the eighth plate 224 is located on the side of the first plate 211 facing away from the cover plate 10, and is fixed to the first plate 211 and the cover plate 10 by one-time welding at one or more positions.

[0075] By welding in this way, the first plate 211 to the eighth plate 224 are connected to form an integral frame, which has a good effect of reinforcing the strength and torsional rigidity of the cover plate 10, and has fewer welding parts and a simple process.

[0076] refer to Figures 1 to 3 There can be multiple cells inside the tray and they are arranged in sequence along the first direction X, and the length direction of the cells is the second direction Y. After the reinforcing member 20 forms a frame structure, the fifth plate 221 and the seventh plate 223 correspond to the two ends of the length direction of the cells in the battery pack, respectively. The fifth plate 221, the first plate 211, the seventh plate 223 and the third plate 213 can disperse the stress of the cells.

[0077] In one embodiment, reference Figure 1 and Figure 2 , the middle part of the reinforcing plate 22 protrudes toward the side facing away from the cover plate 10. Specifically, the reinforcing plate 22 may be protruding in the middle part of each plate, or in the middle part of one or more plates, and may be partially protruding or fully protruding. The protruding part may be the same as or different from the length direction of the plate itself, and there is no limitation. The middle part of the reinforcing plate 22 is protruding, which can enhance the structural strength and torsional rigidity of the reinforcing plate 22, and the structural strength and torsional strength of the reinforcing plate 22 are higher than those of a flat plate.

[0078] Optionally, the first surface 11 of the cover plate 10 may also be provided with a copper bar 30, which is used to connect the battery cells. The reinforcing member 20 may be provided with a structure adapted to the copper bar 30, such as a groove, a protrusion, etc. Figure 2 As shown, a relief opening 226 is provided on the reinforcing plate 21 to accommodate the copper busbar 30 .

[0079] Optional, reference Figure 2 , the reinforcing member 20 is provided with a through hole, and the cover plate 10 is provided with a mounting hole 13, and the mounting hole 13 is opposite to the through hole. Among them, a first through hole 215 is provided on the reinforcing plate 21, and a second through hole 225 is provided on the reinforcing plate 22. The first through hole 215 and the second through hole 225 are opposite to each other and together constitute the through hole of the reinforcing member 20. The through hole can be a round hole, a square hole, etc. without limitation. The mounting hole 13 can be a screw hole. During installation, the bolt is passed through the mounting beam and then extended into the through hole and tightened with the mounting hole 13 to fix the cover plate assembly to the mounting beam. In another embodiment, the cover plate assembly also includes a hanging member, which passes through the through hole and is fixedly connected to the mounting hole 13. The hanging member is fixedly connected to the mounting beam by screwing or clamping to hang the battery pack on the mounting beam.

[0080] Among them, there can be multiple mounting holes 13 on the cover plate 10, and the reinforcement member 20 can also have multiple through holes. The number of mounting holes 13 can be the same as the number of through holes, and the two correspond one to one; the number of mounting holes 13 can also be more than the number of through holes, and some mounting holes 13 correspond one to one with all the through holes, and the remaining mounting holes 13 are staggered in the reinforcement member 20, and some bolts pass through the through holes to cooperate with the mounting holes 13, and the remaining bolts do not need to pass through the through holes and are directly connected to the mounting holes 13.

[0081] refer to Figure 1 The cover plate 10 also has an inspection window 14 extending from the first surface 11 to the second surface 12. The inspection window 14 may be provided with a detachable inspection cover (not shown). When the battery pack needs to be inspected, the inspection cover may be opened to inspect the battery pack.

[0082] In the related art, reference Figure 2 Most of the battery packs do not have a reinforcement structure on the cover plate 10, so they can only rely on the strength and torsional rigidity of the cover plate 10 to resist deformation and are easily damaged. In the related art, there is a battery pack design with a reinforcement structure, and its reinforcement structure is only equivalent to the first plate 211 and the third plate 213, or the second plate 212 and the fourth plate 214 of the utility model, which is just to set some independent reinforcement structures on the cover plate 10, and there is no connection between the structures, which has a poor effect on strengthening the strength and torsional rigidity of the cover plate 10.

[0083] The cover plate assembly provided in the embodiment of the present invention is provided with a unique reinforcement member 20, which can significantly improve the strength and torsional rigidity of the cover plate 10 and improve reliability.

[0084] In the description of the embodiments of the present invention, it should be noted that the orientation or positional relationship of terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are based on the orientation or positional relationship described in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as a limitation on the present invention.

[0085] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Ordinary technicians in this field can understand that all or part of the processes of the above embodiment and equivalent changes made according to the claims of the present invention still fall within the scope covered by the present invention.

Claims

1. A cover plate assembly, characterized in that: include: Cover plate; A reinforcing member, comprising a reinforcing plate and a reinforcing plate, wherein the reinforcing plate is arranged on one side of the cover plate in the thickness direction, and the reinforcing plate is at least partially arranged on the reinforcing plate; A portion of the reinforcing member extends along a first direction, and a portion of the reinforcing member extends along a second direction. The first direction and the second direction intersect and are both perpendicular to a thickness direction of the cover plate.

2. The cover plate assembly according to claim 1, characterized in that: The reinforcing plate, the reinforcing plate and the cover plate are fixed by one welding.

3. The cover plate assembly according to claim 1, characterized in that: The reinforcing plate includes a first plate and a second plate connected to each other, wherein the first plate extends along the first direction, and the second plate extends along the second direction.

4. The cover plate assembly according to claim 3, characterized in that: The reinforcing plate further includes a third plate and a fourth plate connected to each other, wherein the third plate extends along the first direction, the fourth plate extends along the second direction, the third plate is further connected to the second plate, and the fourth plate is further connected to the first plate, so that the reinforcing plate forms an annular component.

5. The cover plate assembly according to claim 4, characterized in that: The first plate, the second plate, the third plate and the fourth plate are an integrally formed structure.

6. The cover plate assembly according to claim 4, characterized in that: The reinforcing plate includes a fifth plate and a sixth plate, the fifth plate extending along the first direction and being stacked on the first plate, and the sixth plate extending along the second direction and being stacked on the second plate.

7. The cover plate assembly according to claim 6, characterized in that: The reinforcing plate further includes a seventh plate and an eighth plate, the seventh plate extending in the first direction and stacked on the third plate, and the eighth plate extending in the second direction and stacked on the fourth plate, so that the reinforcing plate forms an annular member.

8. The cover plate assembly according to claim 7, characterized in that: At least two adjacent plates among the fifth plate, the sixth plate, the seventh plate and the eighth plate have at least partial regions overlapped.

9. The cover plate assembly according to claim 7, characterized in that: Part of the fifth plate is fixedly connected to the second plate, and / or part of the seventh plate is fixedly connected to the second plate, and / or both ends of the eighth plate are fixedly connected to the first plate and the third plate respectively.

10. The cover plate assembly according to any one of claims 1 to 6, characterized in that: The middle portion of the reinforcing plate protrudes toward a side facing away from the cover plate.

11. The cover plate assembly according to claim 1, characterized in that: The reinforcing component is provided with a through hole, and the cover plate is provided with a mounting hole, and the mounting hole is directly opposite to the through hole.

12. A battery pack, characterized in that: It comprises a tray, a battery cell and a cover plate assembly as claimed in any one of claims 1 to 11, wherein the tray and the cover plate assembly together form a receiving cavity, and the battery cell is received in the receiving cavity.

13. The battery pack according to claim 12, characterized in that: The reinforcing member is disposed on a side of the cover plate facing away from the tray.

14. A vehicle, characterized in that: It comprises a mounting beam and a battery pack as claimed in claim 12 or 13, wherein the cover plate assembly is connected and fixed to the mounting beam.

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