New energy battery pack upper cover structure

Abstract

The utility model relates to the technical field of power batteries, in particular to a new energy battery pack upper cover structure which comprises a battery pack upper cover body, a cover plate and press-fit folded edges which are integrally punched are arranged on the battery pack upper cover body, the cover plate protrudes upwards, and the press-fit folded edges are located on the same plane. Second reinforcing ribs which are symmetrically arranged are evenly arranged on the two sides of the cover plate at intervals, first reinforcing ribs are evenly distributed between the second reinforcing ribs, corners are arranged at the corners of the press-fit folding edge, flow guide convex ribs and bolt holes are evenly formed in the press-fit folding edge at intervals, and the bolt holes are matched with the flow guide convex ribs at intervals. The new energy battery pack upper cover structure is integrally formed through stamping, the structural strength is ensured, meanwhile, a laser welding step is omitted, the failure risk is reduced, the edge of the upper cover has a draft angle, the edge strength and the fixing rigidity are improved, the folded edge press-fit position is matched with structural adhesive for sealing treatment, and the overall performance is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to power battery technical field, concretely is a new energy battery package upper cover structure. BACKGROUND

[0002] Power battery package is mainly divided into CTP and CTB, CTP focuses on improving energy density and reducing cost by simplifying and optimizing the physical structure of battery package, and CTB pays more attention to the optimization of electrical connection between battery cells to realize higher power transmission efficiency and system reliability. The battery package upper cover is a relatively important component for the whole battery package, and the requirements of the two different battery integration technologies of CTP and CTB for the upper cover are different. In CTP, the upper cover is separated from the vehicle body chassis, and the upper cover is used for sealing the battery package and packaging structure. At present, many mainstream automobile enterprises use it. The CTB scheme involves battery vehicle body integration, and the battery package upper cover is mostly made of integrated die-cast aluminum alloy or steel mixed material, which can improve the utilization rate of vehicle body and safety.

[0003] Compared with CTP technology, the existing CTB technology is more rigorous for the battery package upper cover. The structural strength and sealing performance of the CTB battery package upper cover have an influence on the service life of the battery package. If the power battery is accidentally damaged, the upper cover structure can protect the people in the vehicle, prevent direct contact between the people in the vehicle and the power battery, improve the sealing effect of the power battery, and avoid the failure of the battery package after being immersed in water.

[0004] Therefore, improving the tensile strength, displacement resistance and stability of the battery package upper cover is a problem to be solved at present. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a new energy battery package upper cover structure to solve the problems of insufficient strength and insufficient sealing of the battery package upper cover of the CTB power battery in the market at present.

[0006] In order to achieve the above purpose, the utility model provides the following technical scheme: a new energy battery package upper cover structure, which comprises a battery package upper cover body, an integral stamping cover plate and a press-fit flange are arranged on the battery package upper cover body, the cover plate is upwardly convex, the press-fit flange is in the same plane, second reinforcing ribs are symmetrically arranged on both sides of the cover plate, first reinforcing ribs are also uniformly distributed between the second reinforcing ribs, an edge corner is arranged at the corner of the press-fit flange, flow guide ribs and bolt holes are also uniformly and intervaliy arranged on the press-fit flange, and the bolt holes and the flow guide ribs are intervaliy matched.

[0007] Preferably, one side of the cover plate is provided with a draft surface, and the draft surface is inclined.

[0008] Preferably, the first reinforcing rib is a long strip structure, and three first reinforcing ribs are arranged symmetrically about the central axis of the cover plate.

[0009] Preferably, the second reinforcing rib is smaller in size than the first reinforcing rib, and the second reinforcing rib is arranged perpendicularly relative to the first reinforcing rib.

[0010] Preferably, the corner extends outward, and the outer end of the corner is in an arc structure, and two bolt holes are arranged at the corner.

[0011] Preferably, the outer side of the crimped flange is provided with a side edge, and the side edge is arranged obliquely upward.

[0012] Compared with the prior art, the new energy battery pack upper cover structure is integrally formed by stamping, ensures the structural strength, eliminates the laser welding step, reduces the failure risk, has a draft angle at the upper cover edge, improves the edge strength and fixing rigidity, and is sealed by the structure glue at the crimped flange, thereby improving the overall performance. The new energy battery pack upper cover structure designs the cover plate into an upward protruding structure, and the first reinforcing rib and the second reinforcing rib are arranged symmetrically on the cover plate, the first reinforcing rib and the second reinforcing rib are perpendicular to each other, the stress direction is uniformly distributed, and the tensile resistance, displacement resistance and stability of the cover plate are effectively improved. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is a three-dimensional structure schematic view of the new energy battery pack upper cover structure of the utility model;

[0014] Figure 2 It is a top view of the new energy battery pack upper cover structure of the utility model;

[0015] Figure 3 It is a side view of the new energy battery pack upper cover structure of the utility model;

[0016] Figure 4 It is a corner part structure schematic view of the new energy battery pack upper cover structure of the utility model;

[0017] Figure 5 It is a crimped flange structure schematic view of the new energy battery pack upper cover structure of the utility model.

[0018] In the drawing: 1, battery pack upper cover body; 2, cover plate; 3, first reinforcing rib; 4, second reinforcing rib; 5, corner; 6, crimped flange; 7, flow guide rib; 8, draft surface; 9, bolt hole; 10, side edge. DETAILED DESCRIPTION

[0019] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.

[0020] Please refer to Figures 1-5The utility model provides a technical scheme: A new energy battery package upper cover structure, including battery package upper cover main part 1, be equipped with the cover plate 2 and the compression edge 6 of integrative stamping of battery package upper cover main part 1, and the cover plate 2 is protruding upwards, and the compression edge 6 is in the same plane, and one side of cover plate 2 is equipped with the draw face 8, and the draw face 8 is inclined to set, this structure draw face 8 sets up in the edge of battery package upper cover main part 1, and the demoulding of battery package upper cover main part 1 is easy to handle, through the angle design of draw face 8, let the cover plate 2 pressure > 0.7Mpa, and the compression amount can support between 30% and 55%, the cover plate 2 both sides are evenly spaced and are equipped with the second reinforcing rib 4 of symmetrical setting, and first reinforcing rib 3 is evenly distributed between the second reinforcing rib 4, and first reinforcing rib 3 is strip structure, and first reinforcing rib 3 sets three, and first reinforcing rib 3 is about the central axis of symmetry of cover plate 2 setting, this structure through the first reinforcing rib 3 setting in the middle area, can large area's carry out the tensile force bearing treatment, and first reinforcing rib 3 is evenly symmetrical distribution, and the stress is uniform, under the same size, material etc. requirement, battery package upper cover main part 1 has stronger structural strength, the size of second reinforcing rib 4 is less than the size of first reinforcing rib 3, and second reinforcing rib 4 is vertically set relative to first reinforcing rib 3, this structure second reinforcing rib 4 plays the edge part structural enhancement treatment to cover plate 2, and second reinforcing rib 4 and first reinforcing rib 3 are perpendicular to each other, make stress more uniform, and the corner 5 is equipped with in the corner of compression edge 6, and the flow convex rib 7 and bolt hole 9 are evenly spaced and are equipped with on the compression edge 6, and the corner 5 expands outward, and the outer end of corner 5 is arc structure, and two bolt holes 9 are set up at corner 5, this structure passes through the size of corner 5 and can ensure the stability of the connection of corner 5 part when installing battery package upper cover main part 1, the flow convex rib 7 not only plays the role of increasing structural strength, improves fixed surface strength and fixed rigidity, but also can play a certain degree of flow effect under the wading working condition, and the bolt hole 9 and the flow convex rib 7 are spaced and cooperate, and the lateral side 10 is equipped with on the outside of compression edge 6, and the lateral side 10 is inclined to set up above, this structure forms fixed surface through compression edge 6, can guarantee sealing performance by smearing structural glue at the bottom of compression edge 6, battery package upper cover main part 1 is integrally formed, greatly saves consumption on mass production and cost, supports large-scale mass production, improves production efficiency, reduces welding work simultaneously, thereby reduces the failure risk, the surface of battery package upper cover main part 1 is phosphorized, improves surface hardness and forms a corrosion-resistant layer.

[0021] Working principle: when using the new energy battery pack cover structure, first, the battery pack cover body 1 is integrally made of the cover plate 2 and the pressing edge 6 by stamping, the draw surface 8 is used for the demolding process of the battery pack cover body 1, the first reinforcing rib 3 and the second reinforcing rib 4 enhance the structural strength of the cover plate 2, so that the cover plate 2 is uniformly stressed, and the tensile strength, displacement resistance and stability of the cover plate 2 are ensured, when the battery pack cover body 1 and the battery pack are fixed, structural glue is coated on the bottom surface of the pressing edge 6, so that the sealing property and waterproof property are ensured, after the battery pack cover body 1 and the lower shell are positioned and aligned, the battery pack cover body 1 is installed and fastened through the bolt from the bolt hole 9, the bolts are tightened in sequence according to the diagonal line, the corner 5 improves the structural strength of the corner of the battery pack cover body 1, and the positioning and stable treatment of the pressing edge 6 during installation is facilitated, the flow guide rib 7 enhances the structure of the pressing edge 6, so that the fastening property of the connection is ensured, meanwhile, the flow guide rib 7 plays a role of flow guide under the wading working condition, the side edge 10 is flat through the upper inclined surface structure, so that the protection property of the pressing edge 6 is ensured, after the battery pack cover body 1 is assembled, the air tightness detection and the mechanical strength verification can be carried out, so that a series of work is completed.

[0022] Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part of the technical features, any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A new energy battery pack upper cover structure, comprising a battery pack upper cover body (1), characterized in that: The battery pack upper cover body (1) is provided with a cover plate (2) and a press-fit flange (6) formed by one-piece stamping, the cover plate (2) is upwardly protruding, and the press-fit flange (6) is in the same plane, the cover plate (2) is uniformly and symmetrically provided with second reinforcing ribs (4) on both sides, and the second reinforcing ribs (4) are uniformly distributed with first reinforcing ribs (3) therebetween, the press-fit flange (6) is provided with corners (5) at corners, and the press-fit flange (6) is uniformly and spacedly provided with flow guide ribs (7) and bolt holes (9), and the bolt holes (9) are spacedly matched with the flow guide ribs (7).

2. The new energy battery pack upper cover structure according to claim 1, characterized in that: One side of the cover plate (2) is provided with a draft surface (8) which is obliquely arranged.

3. The new energy battery pack upper cover structure according to claim 1, characterized in that: The first reinforcing rib (3) is in a long strip structure, three first reinforcing ribs (3) are arranged, and the first reinforcing ribs (3) are symmetrically arranged about the central axis of the cover plate (2).

4. The new energy battery pack upper cover structure according to claim 3, characterized in that: The size of the second reinforcing rib (4) is smaller than that of the first reinforcing rib (3), and the second reinforcing rib (4) is arranged perpendicularly to the first reinforcing rib (3).

5. The new energy battery pack upper cover structure according to claim 1, characterized in that: The corner (5) is outwardly expanded, the outer end of the corner (5) is in an arc structure, and two bolt holes (9) are formed at the corner (5).

6. The new energy battery pack upper cover structure according to claim 1, characterized in that: The outer side of the press-fit flange (6) is provided with a side edge (10), and the side edge (10) is obliquely arranged upwards.

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