CN212967934U

CN212967934U - Cover body of battery pack and battery pack

Info

Publication number: CN212967934U
Application number: CN202021991481.4U
Authority: CN
Inventors: 刘斌
Original assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Current assignee: Evergrande New Energy Automobile Investment Holding Group Co Ltd
Priority date: 2020-09-11
Filing date: 2020-09-11
Publication date: 2021-04-13
Anticipated expiration: 2030-09-11

Abstract

The utility model relates to a lid and battery package of battery package, lid (1) include concave part (3) and convex part (4) of difference in height direction of lid (1), the play of convex part (4) the part of concave part (3) is used for injecing the module unit. The cover body of the battery pack is provided with the convex part, so that the module unit is convenient to limit, the installation space is enlarged, and the safety performance is improved.

Description

Cover body of battery pack and battery pack

Technical Field

The utility model relates to an electric automobile technical field specifically relates to a lid and battery package of battery package.

Background

With the national vigorous popularization of new energy fields, electric vehicles have become the mainstream trend in the future. The power battery pack is used as a power supply component which is the most core of the whole vehicle, and determines key indexes of driving range, cost, service life, safety, maintainability and the like of the whole vehicle.

The power battery pack generally comprises a battery box and a plurality of modules, and the modules are packaged in a cavity of the battery box so as to ensure that the modules can normally run. In the battery box, electrically connect through electrically conductive pieces such as copper bar, pencil for a plurality of modules, however, the upper and lower surface of battery box is planar structure usually, can't carry on spacingly to module or electrically conductive piece through self structure, causes module and electrically conductive piece to take place the dislocation easily when receiving the collision, causes the short circuit even, and the security performance is poor.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the safety problem that the upper and lower surface of battery box that prior art exists leads to for planar structure, providing a lid and the battery package of battery package, the lid of this battery package is convenient for carry on spacingly to the module unit through setting up the convex part, has still enlarged installation space, has improved the security performance.

In order to achieve the above object, a first aspect of the present invention provides a cover for a battery pack, the cover including a concave portion and a convex portion having different heights in a height direction of the cover, a portion of the convex portion higher than the concave portion being used to define a module unit.

Alternatively, the concave portion and the convex portion are both provided to extend in the width direction of the lid body.

Optionally, the cover body comprises reinforcing structures distributed in a staggered manner.

Optionally, the reinforcing structure includes a first reinforcing rib and a second reinforcing rib, which extend in different directions and intersect with each other, and the first reinforcing rib and/or the second reinforcing rib are/is of a groove structure and extend to the outer edge portion of the cover body.

Optionally, the first reinforcing rib extends along the width direction of the cover body, and the second reinforcing rib extends along the length direction of the cover body.

Optionally, the reinforcing structure includes a plurality of first reinforcing ribs arranged at intervals, the cover body includes a drainage groove arranged between two adjacent first reinforcing ribs, and the drainage groove intersects with the second reinforcing rib and extends to the outer edge of the cover body.

Optionally, the cover body includes a first fitting portion and a second fitting portion in a longitudinal direction, the concave portion and the convex portion are provided in the first fitting portion, and the reinforcing structure is provided in the second fitting portion.

Optionally, the second assembling portion includes protrusions disposed along a length direction of the cover, and the reinforcing structures are disposed on two sides of the width direction of the protrusions, respectively.

Optionally, the width of the second fitting portion gradually decreases with distance from the first fitting portion.

The utility model discloses the second aspect still provides a battery package, the battery package includes first lid, module unit and second lid, the second lid does the lid, first lid with the second lid encloses into the accommodation space, the module unit sets up in the accommodation space.

Through the technical scheme, the utility model provides a lid and battery package of battery package, the lid of this battery package is through setting up to concave-convex structure for the convex part can be used for holding and injecing the module unit, has obviously enlarged the installation space of module unit, has prevented that the module unit from shifting easily when receiving the striking effect, has improved the security performance of battery package. Taking the module unit as an example, the module unit includes a plurality of modules and a conductive member for being electrically connected with each module, then: the cover body can limit the modules with different layers through the convex parts, for example, the cover body is buckled above the module unit, the concave part is used for accommodating a single-layer module, and the convex part is used for accommodating a multi-layer module, so that the convex part is convenient for limiting other layers of modules above the lowest layer of modules of the multi-layer module; or, the cover body in the present application may limit the conductive component through a convex portion, for example, the cover body is buckled above the module unit, the concave portion is used for accommodating the multilayer module, and the convex portion is used for accommodating the multilayer module with the same number of layers (which is the same as the number of layers of the multilayer module accommodated in the concave portion) and the conductive component located above the multilayer module, so that the convex portion can limit the conductive component of the module unit, and the safety performance is better.

Drawings

Fig. 1 is a schematic structural view of a cover body of a battery pack provided by the present invention;

fig. 2 is a top view (or bottom view) of the cover shown in fig. 1.

Description of the reference numerals

1. A cover body; 2. a first fitting portion; 3. a recess; 4. a convex portion; 5. a reinforcing structure; 6. a first reinforcing rib; 7. a second reinforcing rib; 8. a water discharge tank; 9. a protrusion; 10. an explosion-proof valve mounting hole; 11. avoiding the portion.

Detailed Description

The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings. It is to be understood that the description of the embodiments herein is for purposes of illustration and explanation only and is not intended to limit the invention.

The present invention provides a battery pack cover, as shown in fig. 1 and 2, wherein the cover 1 includes a concave portion 3 and a convex portion 4 having different heights in the height direction of the cover 1, and the convex portion 4 is higher than the concave portion 3 to define a module unit.

Through the technical scheme, the utility model provides a lid 1 and battery package of battery package, lid 1 of this battery package is through setting up to concave-convex structure for convex part 4 can be used for holding and injecing the module unit, has obviously enlarged the installation space of module unit, has prevented that the module unit from shifting easily when receiving the striking effect, has improved the security performance of battery package. Taking the module unit as an example, the module unit includes a plurality of modules and a conductive member for being electrically connected with each module, then: the cover body 1 in the application can limit modules with different layers through the convex parts 4, for example, the cover body is buckled above the module unit, the concave part 3 is used for accommodating a single-layer module, and the convex part 4 is used for accommodating a multi-layer module, so that the convex part 4 is convenient for limiting other layers of modules, which are positioned above the lowest layer of modules, of the multi-layer module; or, lid 1 in this application can carry out spacing to electrically conductive piece through convex part 4, for example, the lid is detained in the top of module unit, concave part 3 is used for holding multilayer module, convex part 4 is used for holding the multilayer module of the same number of layers (referring to, the same with the number of layers of multilayer module that concave part 3 held) and is located the electrically conductive piece of this multilayer module top, thereby make convex part 4 carry out spacing to the electrically conductive piece of module unit, both solved easily shift when electrically conductive piece receives the striking effect and even appear the contact short circuit scheduling problem, still solve the safety problem that the electrically conductive piece of battery package can only crowd the easy emergence short circuit that leads to in the narrow and small clearance between the adjacent module among the prior art, the security performance is better. It should be noted that the conductive member may be in various forms such as a low voltage wire harness and/or a high voltage copper bar.

Generally, the battery pack is susceptible to impact at the front or rear, and as shown in fig. 1 and 2, the concave portion 3 and the convex portion 4 are both configured to extend along the width direction of the cover body 1, so as to laterally limit the conductive member and/or the module of the module unit, prevent the conductive member and/or the module from being displaced when the front or rear of the battery pack is impacted, and improve the safety performance of the battery pack. Wherein, the cover body can be provided with various forms of convex parts 4, such as: a single protrusion 4 as shown in fig. 1 may be provided; a plurality of projections 4 may be provided, and each of the projections 4 may be provided at the same height or at different heights.

As shown in fig. 1 and 2, the cover body 1 includes the reinforcing structures 5 distributed in a staggered manner, so that the overall strength of the cover body 1 is improved, and the protection performance of the cover body 1 is improved.

Further, additional strengthening 5 is different and the first strengthening rib 6 and the second strengthening rib 7 of crossing setting including extending direction, first strengthening rib 6 and/or second strengthening rib 7 is groove structure and extends to the outward flange part of lid 1, simple structure, the preparation and the processing of being convenient for have not only improved the bulk strength of lid 1, still are favorable to ponding or long-pending miscellaneous etc. on the lid 1 to discharge via first strengthening rib and/or second strengthening rib 7, have improved the corrosion protection performance of lid 1, have prolonged the life of lid 1.

Furthermore, first strengthening rib 6 is followed the width direction of lid 1 extends, second strengthening rib 7 is followed the length direction of lid 1 extends, has further improved the bulk strength of lid 1, and tests can find that first-order mode can reach about 35Hz, and current upper cover structure is difficult to reach.

In order to optimize the anticorrosion effect of the cover body 1, the reinforcing structure 5 comprises a plurality of first reinforcing ribs 6 arranged at intervals, the cover body 1 comprises a water drainage groove 8 arranged between two adjacent first reinforcing ribs 6, the water drainage groove 8 and the second reinforcing ribs 7 are intersected and extend to the outer edge of the cover body 1, so that accumulated water or accumulated impurities on the cover body 1 can be drained quickly, and the anticorrosion performance of the cover body 1 is further improved. Specifically, the accumulated water or impurities on the lid 1 may be discharged through a plurality of paths, for example, not only directly discharged through the first reinforcing rib and/or the second reinforcing rib 7, but also discharged after being discharged to the drain groove 8 through the first reinforcing rib and/or the second reinforcing rib 7, and also directly discharged through the drain groove 8. In order to further optimize the corrosion prevention effect of the cover body 1, the depth of the water discharge groove 8 is greater than the groove depth of the first reinforcing rib 6 and the second reinforcing rib 7.

As shown in fig. 1 and 2, the cover body 1 includes a first assembly portion 2 and a second assembly portion in the length direction, the concave portion 3 and the convex portion 4 are disposed on the first assembly portion 2, and the reinforcing structure 5 is disposed on the second assembly portion, so that the cover body 1 is ensured to have a limit function and improve the overall strength, the overall structure of the cover body 1 is simplified, the processing difficulty of the cover body 1 is reduced, the manufacture is facilitated, and the production cost is saved.

Furthermore, the second assembling part comprises protrusions 9 arranged along the length direction of the cover body 1, the reinforcing structures 5 are respectively arranged at two sides of the width direction of the protrusions 9, so that the protrusions 9 are used for accommodating and limiting the conductive piece, the conductive piece can extend along the length direction of the cover body 1 in the protrusions 9, the installation space of the conductive piece is remarkably enlarged, the conductive piece is prevented from being in contact short circuit due to collision, and the safety performance of the battery pack is improved; but also can accommodate and allow the cold liquid pipe to pass through, the design is more reasonable, and the internal space of the battery pack is fully utilized. As shown in fig. 1, the cover body 1 comprises an enclosure frame extending from the outer contour of the cover body 1 to the lower side shown in fig. 1, an explosion-proof valve mounting hole 10 is formed in the position, located at the second assembly portion, of the enclosure frame and used for assembling an explosion-proof valve, the explosion-proof valve mounting hole 10 and the protrusion 9 can be located on the same straight line, when a module in the battery pack breaks down and generates a large amount of heat, the heat can be quickly discharged through the explosion-proof valve via the protrusion 9, so that the explosion of the battery pack can be delayed, and more escape time can be won for passengers; furthermore, the edge of the enclosure frame is turned outwards to form a flanging, so that mounting points (for example, various structures such as mounting holes) can be conveniently machined at the flanging to be assembled with the second cover body mentioned below, and the flanging is turned downwards to form a downward flanging at the flanging edge shown in fig. 1, so that the dustproof and waterproof protection effects of the battery pack are optimized, and the protection grade of the battery pack can reach IP68 through tests.

Further, the position of the second fitting portion adjacent to the first fitting portion is a avoiding portion 11 in a groove structure, and the height of the cover 1 at the avoiding portion 11 is the lowest, so as to fit the layout of the cab of the vehicle, for example, the step area of the cab.

As shown in fig. 1, the width of the second assembly portion gradually decreases with the distance from the first assembly portion 2, so that the auxiliary frame of the vehicle can be avoided, the battery pack can provide enough installation space for the module unit, the occupied space of the battery pack is reduced, and the assembly difficulty of the battery pack is reduced.

The utility model discloses the second aspect still provides a battery package, the battery package includes first lid, module unit and second lid, the second lid does lid 1, first lid with the second lid encloses into the accommodation space, the module unit sets up in the accommodation space. The first cover body (namely, the cover body 1) can be made of Sheet Molding Compound (SMC), and compared with the existing cover body of the battery pack, the cover body 1 in the application is made of Sheet metal materials, so that the light weight design is realized, the energy density of the battery pack is favorably improved, the insulating property is better, and the anti-corrosion capability is stronger; specifically, first lid can set up to various thickness, for example, 2.5mm, compares and sets up more than 3mm in the thickness of the panel beating lid of current battery package usually, has strengthened the lightweight design of first lid, and to a great extent has improved the energy density of battery package. It is worth mentioning that the first cover body can be manufactured by adopting a hot-press forming process, so that the processing cost is reduced. It is worth mentioning that the first cover and the second cover can be assembled in various manners, for example, the first cover is disposed over the second cover.

Through the technical scheme, the utility model provides a lid and battery package of battery package, the lid of this battery package is through setting up to concave-convex structure for convex part 4 can be used for holding and injecing the module unit, has obviously enlarged the installation space of module unit, has prevented that the module unit from shifting easily when receiving the striking effect, has improved the security performance of battery package.

The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited thereto. In the technical idea scope of the present invention, it is possible to provide a solution of the present invention with a plurality of simple modifications to avoid unnecessary repetition, and the present invention is not described separately for various possible combinations. These simple variations and combinations should also be considered as disclosed in the present invention, all falling within the scope of protection of the present invention.

Claims

1. A cover body of a battery pack, characterized in that the cover body (1) includes a concave portion (3) and a convex portion (4) having different heights in a height direction of the cover body (1), and a portion of the convex portion (4) higher than the concave portion (3) is used to define a module unit.

2. Cover according to claim 1, characterized in that the recess (3) and the protrusion (4) are both arranged to extend in the width direction of the cover (1).

3. Cover according to claim 1, characterized in that the cover (1) comprises a staggered reinforcement structure (5).

4. A cover according to claim 3, wherein the reinforcing structure (5) comprises a first reinforcing rib (6) and a second reinforcing rib (7) which extend in different directions and are arranged to intersect, and the first reinforcing rib (6) and/or the second reinforcing rib (7) are/is of a groove structure and extend to an outer edge portion of the cover (1).

5. A cover according to claim 4, characterized in that the first bead (6) extends in the width direction of the cover (1) and the second bead (7) extends in the length direction of the cover (1).

6. A cover according to claim 4, wherein the reinforcing structure (5) comprises a plurality of first reinforcing ribs (6) arranged at intervals, the cover (1) comprises a drainage channel (8) arranged between two adjacent first reinforcing ribs (6), and the drainage channel (8) is arranged to intersect with the second reinforcing rib (7) and extends to the outer edge of the cover (1).

7. A cover according to any one of claims 3-6, characterized in that the cover (1) comprises a first fitting part (2) and a second fitting part in the length direction, the recess (3) and the protrusion (4) being provided in the first fitting part (2), and the reinforcement structure (5) being provided in the second fitting part.

8. A cover according to claim 7, wherein the second fitting portion comprises a projection (9) provided in the length direction of the cover (1), and the reinforcing structures (5) are provided on both sides in the width direction of the projection (9), respectively.

9. A cover according to claim 7, wherein the width of the second fitting portion gradually decreases away from the first fitting portion (2).

10. A battery pack, characterized in that the battery pack comprises a first cover body, a module unit and a second cover body, the second cover body is the cover body (1) according to any one of claims 1-9, the first cover body and the second cover body enclose an accommodating space, and the module unit is arranged in the accommodating space.