CN116826286A

CN116826286A - Power battery pack and vehicle

Info

Publication number: CN116826286A
Application number: CN202210285580.8A
Authority: CN
Inventors: 周颖; 张玉彩; 孙为; 张中帆; 李兴佳; 朱元元
Original assignee: PSA Automobiles SA
Current assignee: PSA Automobiles SA
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2023-09-29

Abstract

The invention provides a power battery pack and a vehicle. The power battery pack is suitable for being attached to a lower body sheet metal of a vehicle, comprises a shell, a top cover attached to the shell, and a battery module accommodated in the shell and sealed by the top cover, wherein the power battery pack further comprises a protective cover attached to the shell, and the protective cover covers a avoidance notch for a body assembly on the shell and is matched with the outline of the avoidance notch. According to the invention, the protective cover is provided on the shell of the power battery pack aiming at the avoiding notch, so that the perceived quality is improved, the safety performance of the battery pack is greatly improved, and the impact resistance and corrosion resistance of the sheet metal at the bottom of the vehicle body are improved.

Description

Power battery pack and vehicle

Technical Field

The invention relates to the field of vehicles, in particular to the field of power battery systems of new energy vehicles. And more particularly, to a power battery pack and a vehicle using the same.

Background

With the increasing popularity of new energy automobiles, higher and higher requirements are continuously put forth on battery pack technology of key technology, wherein a battery box body for bearing a battery pack plays a vital role in the safety and protection of a power battery pack. The battery box body comprises a bottom plate, side walls and a cover plate, and the cover plate is in sealing connection with the side walls so as to seal the battery pack in the box body. Generally, the side wall is provided with an avoidance notch for adapting to related components when the power supply pack is assembled on a vehicle body or maintained, and the problem of influencing perceived quality exists at the avoidance notch. After the power battery pack is assembled to the lower body sheet metal of the vehicle, the damage risk caused by gravel impact and the like exists at the position of avoiding the notch because of lack of protection.

Disclosure of Invention

The present invention has been made to solve the above-mentioned problems occurring in the prior art, and an object of the present invention is to provide a power battery pack that improves the external appearance quality and enhances the use safety in a cost-effective and reliable manner.

To this end, according to one aspect of the present invention, there is provided a power battery pack adapted to be attached to a lower body panel of a vehicle, and including a housing, a top cover attached to the housing, and a battery module accommodated in the housing and sealed by the top cover, wherein the power battery pack further includes a protective cover attached to the housing, the protective cover shielding a relief notch for a body fitting on the housing and conforming to a contour of the relief notch.

The present invention may further include any one or more of the following alternative forms according to the technical idea described above.

In some alternatives, the housing includes at least a bottom panel and a side rail sealingly connected to the bottom panel, and the protective cover is removably secured to the relief notch on the side rail.

In some alternative forms, the protective cover comprises a shielding part for shielding the avoidance slot, and a first mounting part and a second mounting part which extend from two ends of the shielding part back to the back, wherein the first mounting part and the second mounting part are respectively fixed to side beams at two sides of the avoidance slot.

In some alternatives, the masking portion is configured as a recess that conforms to the relief notch, and the first and second mounting portions are configured to conform to a surface of the side rail.

In some alternatives, the protective cover is provided with a pre-mounting structure by which the protective cover is mounted to the side rail and then secured thereto by fasteners.

In some alternatives, the pre-mounting structure includes at least a snap-fit hook formed in the shielding portion, the snap-fit hook adapted to be embedded in the structure of the side sill.

In some alternatives, the first and second mounting portions are secured to the side beams by fasteners, the side beams being provided with corresponding mounting holes which are embedded with bushings which mate with the fasteners.

In some alternative forms, the first and/or second mounting portions are provided with lips adapted to abut and overlap adjacent body parts.

In some alternative forms, the protective cover is integrally formed by injection molding.

According to yet another aspect of the present invention, there is provided a vehicle including the power battery pack described above.

According to the invention, the protective cover is provided on the shell of the power battery pack aiming at the avoiding notch, so that the perceived quality is improved, the safety performance of the battery pack is greatly improved, and the impact resistance and corrosion resistance of the sheet metal at the bottom of the vehicle body are improved.

Drawings

Other features and advantages of the present invention will be better understood from the following detailed description of alternative embodiments taken in conjunction with the accompanying drawings, in which like reference characters identify the same or similar parts throughout, and in which:

FIG. 1 is a schematic view of a power cell pack with a top cover removed according to one embodiment of the invention;

FIG. 2 is a schematic illustration of a relief notch on a side rail of a housing of a power cell pack;

FIG. 3 is a schematic view of a protective cover attached at a relief slot according to one embodiment of the present invention and showing a vehicle body fitting;

FIG. 4 is a schematic view from above in FIG. 3;

FIG. 5 is a schematic cross-sectional view taken along line A-A of FIG. 4;

FIG. 6 is similar to FIG. 4 with the body fitting removed and showing a portion of the body panel;

FIG. 7 is a schematic cross-sectional view taken along B-B in FIG. 6;

FIG. 8 is a schematic cross-sectional view taken along line C-C of FIG. 6;

FIG. 9 is similar to FIG. 6 with the body panel removed;

FIG. 10 is a schematic cross-sectional view taken along D-D in FIG. 9;

FIG. 11 is a schematic cross-sectional view taken along E-E in FIG. 9;

fig. 12 is a schematic cross-sectional view taken along F-F in fig. 9.

Detailed Description

The making and using of the embodiments are discussed in detail below. It should be understood, however, that the detailed description and the specific examples, while indicating specific ways of making and using the invention, are intended for purposes of illustration only and are not intended to limit the scope of the invention. The structural position of the various components as described, such as the directions of up, down, top, bottom, etc., is not absolute, but rather relative. When the individual components are arranged as shown in the figures, these directional expressions are appropriate, but when the position of the individual components in the figures changes, these directional expressions also change accordingly.

Herein, unless specifically stated and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly. For example, the two parts can be fixedly connected, detachably connected or integrated; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the terms herein above will be understood by those skilled in the art as the case may be.

Herein, "front" and "rear" refer to the front-rear direction of the vehicle, and furthermore, "lateral" refers to a direction that is relatively small in size, which may also be referred to as a width direction, and "longitudinal" refers to a direction that is relatively large in size, which may also be referred to as a length direction.

Herein, the vehicle is a new energy vehicle using a power battery pack as an operation power source and/or a driving power source, including but not limited to a pure electric vehicle, a hybrid vehicle, an extended range vehicle, or the like.

In general, a power battery pack for a vehicle includes a battery pack or a battery cell, a battery pack management module, a battery case, and corresponding accessories, and the battery case as a battery pack carrier plays a vital role in safety and protection of the power battery pack. After the power battery is packaged and mounted on the lower body metal plate of the vehicle, certain battery boxes with modeling designs often need to provide avoidance notches for vehicle assembly parts such as jacks and the like, so that support for the vehicle body or certain component structures is provided during whole vehicle assembly or maintenance, and the structural design of the battery boxes also needs to meet additional functional requirements. It should be understood that vehicle fittings include, but are not limited to, components such as jacks, brackets, etc. used in the assembly, service, maintenance, etc. of the entire vehicle.

Referring to fig. 1, a power battery pack 100 according to an embodiment of the present invention includes a case, a top cover (not shown) attached to the case, and a battery module 110 accommodated in the case and sealed by the top cover. In some embodiments, the housing includes a bottom panel 124 and side members 123 sealingly connected to the bottom panel 124, where the side members 123 refer to structural members extending longitudinally of the power cell pack, typically extruded sheet metal, such as aluminum alloy. The housing of the power cell pack further includes a front beam 122 and a rear beam 121 extending in the lateral direction. Referring to fig. 2, after the power battery pack is assembled to the lower body sheet metal 200, for example, the side member 123 is provided with a relief notch 125 for facilitating placement of the vehicle assembly for assembly or maintenance of the entire vehicle. The avoidance slot 125 is often formed by a milling process, and the section is not attractive, and the internal structure of the battery pack can be exposed, which is not beneficial to safe use. In addition, in the driving process, the notch is avoided, so that gravel impact cannot be avoided, the electrophoresis coating of the battery pack shell is possibly damaged, electrolyte corrosion occurs, and the impact resistance and corrosion performance of the sheet metal at the bottom of the vehicle body are affected.

To this end, the power cell pack of the present invention further includes a protective cover 130 attached to the housing, the protective cover 130 shielding the escape slots 125 for the vehicle body fittings on the side members 123 of the housing and conforming to the contours of the escape slots in the embodiment shown in fig. 1. It will be appreciated that depending on the different structural designs, the protective covers may also be arranged for the rest of the housing and not limited to above the side beams, and that the size/number of protective covers is not limited to that shown in the figures. Fig. 3 illustrates an exemplary vehicle body assembly 300 in the form of a jack, and since the vehicle body assembly 300 has a substantially circular cross section, the shape of the escape slot is configured to be substantially semicircular, and accordingly, the protective cover 130 has a substantially semicircular portion for shielding the escape slot. It will be appreciated that depending on the vehicle body assembly in different configurations, the shape of the relief notch will also vary accordingly, and the protective cover will conform, preferably conform, to the contour of the relief notch so as to completely conceal the relief notch without adversely affecting the configuration of the housing and the vehicle body components associated therewith.

In some embodiments, the protective cover is removably secured to the relief notch on the side rail to facilitate after-market maintenance of the battery pack. In the embodiment shown in fig. 3 to 5, the protection cover 130 includes a shielding portion 133 shielding the escape slot, and first and second mounting portions 131 and 132 extending from both ends of the shielding portion 133 to the back, wherein the first and second mounting portions 131 and 132 are fixed to the side members 123 on both sides of the escape slot, respectively.

In connection with fig. 6 to 12, the shielding portion 133 is advantageously configured in a concave form conforming to the escape groove, and the first and second mounting portions 131 and 132 are configured to conform to the surface of the side member 123, thereby not only reliably securing the protective cover by effectively utilizing the structure of the side member, but also thereby achieving improved sensory quality. Alternatively, the protective cover is integrally molded by injection molding so as to be molded to fit well with the surfaces of the relief notch and the side sill. In some embodiments, the protective cover is made of a P/E material, i.e., a composite of polypropylene (PP) and Ethylene Propylene Diene Monomer (EPDM), which is easy to mold and has a certain hardness, and can play a role in preventing pebble impact. In this way, the protective cover also avoids the risk of causing breakage of the electrophoretic coating of the battery pack case and corrosion of the electrolyte.

As described above, the first and second mounting portions 131 and 132 are fixed to the side members 123 on both sides of the escape slot, respectively. In some embodiments, the protective cover 130 is provided with a pre-mounting structure by which the protective cover 130 is secured to the side beam 123 by fasteners after being mounted to the side beam 123. In this way, the assembly process of the protective cover to the side member can be improved, and the protective cover is prevented from affecting the assembly of the battery pack to the under-body sheet metal, and the assembly process and time are optimized.

As illustrated in fig. 10, the pre-mounting structure includes at least a snap-in hook 135 formed at the shielding portion 133, and since the side member 123 is an extrusion-molded member, the protection cover 130 is an injection-molded member having a certain elasticity, the snap-in hook 135 is adapted to be embedded in the structure of the side member 123, so that the protection cover can be pre-mounted on the side member without additional fasteners. Subsequently, referring to fig. 6, 8 and 9, 12, the first and second mounting portions 131 and 132 are fixed to the side members 123 by fasteners 140 such as rivets, wherein the side members 123 are provided with respective mounting holes 126, and bushings 150, such as preassembled nuts, fitted with the fasteners 140 are embedded in the mounting holes 126. This helps to firmly and reliably fix the protective cover to the side member, while also contributing to an increase in structural strength to the mounting hole area of the side member, avoiding deformation after multiple disassembly and assembly of the protective cover.

As can be seen in the cross sections shown in fig. 5 and 7, the shielding portion 133 of the protective cover is fitted to the surface of the side member 123 and is configured to be fitted to the recessed form of the avoidance notch so as to be adjacent to the vehicle body sheet metal member such as the lower vehicle body sheet metal member 200, whereby the protective cover can function as a barrier against the impact of gravel during running, improving the impact wear and corrosion resistance of the vehicle body bottom sheet metal member.

In certain embodiments, the first mounting portion 131 and/or the second mounting portion 132 are further provided with a lip adapted to abut and overlap an adjacent body member. For example, as shown in fig. 3, a lip 134 is provided on the side of the first attachment portion 131 facing the rocker lower rocker guard 210. During assembly, the protective cover is assembled onto the side beams of the battery pack through the pre-installation structure and the fasteners, then the battery pack is assembled onto the vehicle body, and finally the side wall lower threshold guard plate is installed. At this time, the lip 134 is superimposed between the side sill 123 and the rocker under the rocker cover 210, avoiding visible substantial gaps, thereby improving perceived quality.

The power battery pack of the invention improves the assembly process of the protective cover to the shell (especially the side beam) of the battery pack by providing the protective cover and optimizing the structure and the installation mode thereof, avoids the adverse effect of the protective cover on the battery pack assembled to the sheet metal under the vehicle body, and optimizes the assembly process and time. And the protective cover can cover the milling structure of the side beam to improve the perception quality, resist the gravel impact and improve the impact resistance and corrosion resistance of the battery pack shell and the sheet metal at the bottom of the vehicle body. The protective cover has the advantages of simple structure, low cost, easy molding and easy assembly and disassembly, and is suitable for various occasions.

It should be understood herein that the embodiments shown in the drawings show only alternative shapes, sizes and arrangements of the power cell pack and protective cover according to the present invention, however, they are merely illustrative and not limiting, and other shapes, sizes and arrangements may be adopted without departing from the spirit and scope of the present invention.

While the foregoing has described the technical content and features of the present invention, it will be appreciated that those skilled in the art, upon attaining the teachings of the present invention, may make variations and improvements to the concepts disclosed herein, which fall within the scope of the present invention. The above description of embodiments is illustrative and not restrictive, and the scope of the invention is defined by the claims.

Claims

1. A power battery pack adapted to be attached to a lower body panel of a vehicle and comprising a housing, a top cover attached to the housing, and a battery module housed within the housing and sealed by the top cover, characterized in that the power battery pack further comprises a protective cover attached to the housing, the protective cover concealing a relief notch for a body fitting on the housing and conforming to the contour of the relief notch.

2. The power cell pack of claim 1 wherein the housing comprises at least a bottom panel and a side rail sealingly connected to the bottom panel, the protective cover being removably secured to the relief notch on the side rail.

3. The power battery pack according to claim 2, wherein the protective cover includes a shielding portion shielding the escape slot, and first and second mounting portions extending from opposite ends of the shielding portion, the first and second mounting portions being fixed to side members on opposite sides of the escape slot, respectively.

4. The power cell pack of claim 3, wherein the shielding portion is configured in a concave form conforming to the escape slot, and the first and second mounting portions are configured to conform to a surface of the side member.

5. A power cell pack according to claim 3, wherein the protective cover is provided with a pre-mounting structure by which the protective cover is mounted to the side members and then secured thereto by fasteners.

6. The power cell pack of claim 5, wherein the pre-mounting structure includes at least a snap-in hook formed in the shielding portion, the snap-in hook adapted to be embedded in the structure of the side sill.

7. The power cell pack of claim 5, wherein the first and second mounting portions are secured to the side members by fasteners, the side members being provided with corresponding mounting holes that are embedded with bushings that mate with the fasteners.

8. A power cell pack according to claim 3, wherein the first and/or second mounting portions are provided with lips adapted to abut and overlap adjacent body parts.

9. The power cell pack of any one of claims 3 to 8, wherein the protective cover is integrally formed by injection molding.

10. A vehicle characterized in that it comprises a power battery pack according to any one of claims 1 to 9.