CN215451603U

CN215451603U - Battery package and vehicle

Info

Publication number: CN215451603U
Application number: CN202121462004.3U
Authority: CN
Inventors: 万龙; 彭青波; 李建强; 何为
Original assignee: BYD Co Ltd
Current assignee: BYD Co Ltd
Priority date: 2021-06-29
Filing date: 2021-06-29
Publication date: 2022-01-07
Anticipated expiration: 2031-06-29

Abstract

The utility model provides a battery pack and a vehicle, wherein the battery pack comprises a battery tray, a battery module, a protective layer and a heat-insulating layer, wherein the battery module is arranged on the battery tray; the heat insulation layer is arranged between the battery tray and the battery module and is a foaming material layer for buffering external impact; the protective layer is detachably mounted on one surface, deviating from the battery module, of the battery tray. The battery pack has the characteristics of good heat insulation effect and strong collision impact resistance strength by arranging the heat insulation layer and the protective layer.

Description

Battery package and vehicle

Technical Field

The utility model relates to the technical field of batteries, in particular to a battery pack and a vehicle.

Background

The power battery pack is arranged under a chassis of the new energy automobile, and the power battery pack is exposed at the bottom of the automobile in a large area. In cold low temperature environment in winter, the power battery pack is directly affected by outside cold air, the low temperature performance of the battery pack can be seriously affected, and the energy of the battery is difficult to fully release, so that the endurance mileage of the vehicle is seriously shrunk. In the long-term driving process of the vehicle, the power battery pack is impacted by stones on the road surface, the bottom of the power battery pack is supported when the power battery pack ascends a slope, the obstacles are collided and the like for a long time, so that the electric core and the high-voltage components inside the power battery pack are impacted or extruded by external machinery, the safe use of the power battery pack is influenced, and safety accidents such as thermal runaway or fire explosion are easy to occur.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery pack, aiming at the problem that the low temperature resistance and the collision impact resistance of the existing battery pack are insufficient.

The utility model provides a battery pack which comprises a battery tray, a battery module, a protective layer and a heat-insulating layer, wherein the battery module is arranged on the battery tray; the heat insulation layer is arranged between the battery tray and the battery module and is a foaming material layer for buffering external impact; the protective layer is detachably mounted on one surface, deviating from the battery module, of the battery tray.

Optionally, the battery tray further comprises an energy absorption layer for absorbing impact energy, wherein the energy absorption layer is arranged between the protective layer and the battery tray; the energy absorption layer is adhered to the battery tray, or the energy absorption layer is adhered to the protective layer.

Optionally, the energy absorption layer is made of a polymer material or a composite material; the thickness of the energy absorption layer is 3.0-10.0 mm.

Optionally, the battery tray is integrally welded, and includes a bottom plate, a plurality of cross beams, two first frames and two second frames, where the two first frames are disposed at two ends of the bottom plate; the two second frames are arranged on two sides of the bottom plate, and each second frame is connected with one end of each first frame; the plurality of cross beams are arranged at intervals along the extending direction of the second frames, and the cross beams are connected with the two second frames.

Optionally, two opposite sides of the second frame are provided with a bracket, the bracket, two adjacent beams and the bottom plate surround to form a concave cavity, and the heat insulation layer is arranged in the concave cavity.

Optionally, the thickness of the insulating layer is 2.0-6.0 mm.

Optionally, the protective layer is a steel plate, an aluminum plate or a glass fiber plate.

Optionally, the thickness of the steel plate is 0.6-1.5 mm; the thickness of the aluminum plate is 1.5-3.0 mm; the thickness of the glass fiber plate is 1.0-4.0 mm.

Optionally, the battery pack further comprises a sealing cover and a thermal management part, and the thermal management part is mounted on one surface of the battery tray, which faces away from the battery module; the sealing cover is arranged on the battery tray and used for covering the battery module.

In another aspect, the utility model further provides a vehicle comprising the battery pack.

According to the utility model, the heat-insulating layer is arranged between the battery module and the battery tray, so that heat exchange between the battery module and the battery tray is prevented, the heat insulation effect is realized on the battery module, the influence of external cold air on the battery module is avoided, and the normal use of the battery module is ensured. The heat preservation adopts the foaming material layer, and when the battery tray received external mechanical shock energy, the foaming material layer absorbed the impact energy of battery tray transmission, played good buffering and guard action to the battery module. Through installing the inoxidizing coating on battery tray, when battery package tray received external stone and hit, hold in the palm the end, collide with when stringently assaulting, reduce the resonance range of battery tray after receiving mechanical impact, reduce the impact force of transmission, play good mechanical safety protection to the battery module in the battery tray.

Drawings

Fig. 1 is an exploded view of a battery pack according to an embodiment of the present invention;

fig. 2 is a schematic diagram of a battery pack according to an embodiment of the utility model;

fig. 3 is a schematic diagram of a battery pack according to an embodiment of the utility model;

fig. 4 is a schematic diagram of a battery pack according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a battery tray of a battery pack according to an embodiment of the utility model.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

In order to explain the technical means of the present invention, the following description will be given by way of specific examples.

As shown in fig. 1 to 5, a battery pack according to an embodiment of the present invention includes a battery tray 10, a battery module 2, a protective layer 3, and an insulating layer 4, wherein the battery module 2 is mounted on the battery tray 10. The heat preservation 4 sets up battery tray 10 with between the battery module 2, the foaming material layer of heat preservation 4 for being used for buffering external impact, the foaming material layer is through the impact energy who absorbs battery tray 10 transmission, prevents that battery tray 10's plastic deformation from directly using on battery module 2. The protective layer 3 is detachably mounted on one surface, deviating from the battery module 2, of the battery tray 10, so that the battery tray 10 can be maintained, maintained and checked conveniently, and the cost is low. Specifically, the periphery of the battery tray 10 is provided with a connecting hole 11, and the protective layer 3 is connected with the connecting hole 11 by a bolt or a rivet and is mounted on the battery tray 10.

Further, the foaming material layer with low thermal conductivity selected by the heat-insulating layer 4 comprises one or more of PU foaming material, PPO foaming material, PVC foaming material, PET foaming material and PP foaming material, and the thermal conductivity of the foaming material layer is less than 0.05W/mk. The protective layer 3 is made of a protective material having high strength, high impedance and high damping.

In this embodiment, through set up heat preservation 4 between battery module 2 and battery tray 10, prevent the heat exchange between battery module 2 and the battery tray 10, keep warm and play thermal-insulated effect battery module 2, avoid the influence of external cold air to battery module 2, guarantee battery module 2's normal use. The heat preservation 4 adopts the foaming material layer, and when battery tray 10 received external mechanical shock energy, the foaming material layer absorbed the impact energy of battery tray 10 transmission, played good buffering and guard action to battery module 2. Through installing inoxidizing coating 3 on battery tray 10, when the battery package tray received external stone hit, held in the palm the end, when colliding with the violent impact, reduced the resonance range after battery tray 10 received mechanical impact, reduced the impact force of transmission, played good mechanical safety protection to battery module 2 in the battery tray 10.

As shown in fig. 1 to 3, in some embodiments of the present invention, the battery pack further includes an energy absorbing layer 5 for absorbing impact energy, and the energy absorbing layer 5 is disposed between the protective layer 3 and the battery tray 10. The energy absorption layer 5 is adhered to the battery tray 10, or the energy absorption layer 5 is adhered to the protective layer 3. Specifically, the energy absorbing layer 5 is connected to the battery tray 10 or the protective layer 3 by foaming, or the energy absorbing layer 5 is connected to the battery tray 10 or the protective layer 3 by a glue. The impact deformation energy of the protective layer 3 is absorbed through the energy absorption layer 5, the impact force from the outside to the battery tray 10 is buffered, the overall safety and reliability of the battery pack are improved, and the life safety of personnel and the use safety of the whole vehicle are guaranteed.

In some embodiments of the present invention, the energy absorbing layer 5 is made of a polymer material or a composite material, and can directly prevent the heat exchange between the battery tray 10 and the external environment, and also can insulate and insulate the outside of the battery tray 10 to prevent the external cold air from directly affecting the battery modules 2 in the battery tray 10. The thickness of the energy absorption layer 5 is 3.0-10.0mm, so that the external temperature is effectively isolated and the external impact is buffered. Specifically, the energy absorption layer 5 is a high-molecular foam material layer with high damping and low heat conductivity coefficient, and the high-molecular foam material layer comprises one or more of a PU foam material, a PPO foam material, a PVC foam material, a PET foam material and a PP foam material.

As shown in fig. 1 and 5, in some embodiments of the present invention, the battery tray 10 is integrally welded, and the battery tray 10 includes a bottom plate 12, a plurality of cross members 13, two first side frames 14, and two second side frames 15, where the two first side frames 14 are disposed at two ends of the bottom plate 12. The two second frames 15 are disposed on two sides of the bottom plate 12, and each second frame 15 connects one end of the two first frames 14. A plurality of crossbeam 13 is followed the extending direction interval of second frame 15 sets up, just crossbeam 13 connects two second frame 15 sets up a battery module 2 between two adjacent crossbeams 13, fixes battery module 2 through setting up crossbeam 13. Specifically, the first frame 14 and the second frame 15 are made of aluminum extruded profiles, and the bottom plate 12 is made of aluminum extruded profiles or a single-layer aluminum plate.

As shown in fig. 5, in some embodiments of the present invention, brackets 16 are disposed on opposite sides of two second frames 15, a concave cavity is defined by the brackets 16, two adjacent cross beams 13, and the bottom plate 12, the insulating layer 4 is disposed in the concave cavity, the battery module 2 is mounted on the frames and the brackets 16 of the battery tray 10, and the load strength of the battery tray 10 is increased by disposing the brackets 16.

In some embodiments of the present invention, the thickness of the insulating layer 4 is 2.0-6.0mm, so as to absorb external mechanical impact energy and perform a safety protection function on the battery module 2.

In some embodiments of the present invention, the protective layer 3 is a steel plate, an aluminum plate or a glass fiber plate, and directly attenuates and absorbs mechanical impact energy outside the protective layer 3.

As shown in fig. 1 to 5, in some embodiments of the present invention, the steel plate has a thickness of 0.6 to 1.5 mm. The thickness of the aluminum plate is 1.5-3.0 mm. The thickness of the glass fiber plate is 1.0-4.0 mm.

As shown in fig. 1, in some embodiments of the present invention, the battery pack further includes a sealing cover 6 and a thermal management part 7, and the thermal management part 7 is mounted on a surface of the battery tray 10 facing away from the battery module 2. Further, the heat management unit 7 includes a liquid cooling plate that is attached to the battery tray 10 and cools the temperature of the battery tray 10. The sealing cover 6 is mounted on the battery tray 10 and used for covering the battery module 2.

In another aspect, the present invention further provides a vehicle including the battery pack in any of the above embodiments.

The above examples are only for illustrating the technical solutions of the present invention, and are not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: modifications of the technical solutions described in the embodiments or equivalent replacements of some technical features may still be made. Such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.

Claims

1. A battery pack is characterized by comprising a battery tray, a battery module, a protective layer and a heat-insulating layer, wherein the battery module is arranged on the battery tray; the heat insulation layer is arranged between the battery tray and the battery module and is a foaming material layer for buffering external impact; the protective layer is detachably mounted on one surface, deviating from the battery module, of the battery tray.

2. The battery pack of claim 1, further comprising an energy absorbing layer that absorbs impact energy, the energy absorbing layer being disposed between the protective layer and the battery tray; the energy absorption layer is adhered to the battery tray, or the energy absorption layer is adhered to the protective layer.

3. The battery pack according to claim 2, wherein the energy absorbing layer is made of a polymer material or a composite material; the thickness of the energy absorption layer is 3.0-10.0 mm.

4. The battery pack according to claim 1, wherein the battery tray is integrally welded, the battery tray includes a bottom plate, a plurality of cross members, two first side frames and two second side frames, the two first side frames are disposed at both ends of the bottom plate; the two second frames are arranged on two sides of the bottom plate, and each second frame is connected with one end of each first frame; the plurality of cross beams are arranged at intervals along the extending direction of the second frames, and the cross beams are connected with the two second frames.

5. The battery pack of claim 4, wherein a bracket is disposed on each of opposite sides of the two second frames, the bracket, the two adjacent beams and the bottom plate define a cavity, and the insulating layer is disposed in the cavity.

6. The battery pack according to claim 1, wherein the insulating layer has a thickness of 2.0 to 6.0 mm.

7. The battery pack of claim 1, wherein the protective layer is a steel plate, an aluminum plate, or a fiberglass plate.

8. The battery pack according to claim 7, wherein the steel plate has a thickness of 0.6 to 1.5 mm; the thickness of the aluminum plate is 1.5-3.0 mm; the thickness of the glass fiber plate is 1.0-4.0 mm.

9. The battery pack according to claim 1, further comprising a sealing cover and a thermal management portion, wherein the thermal management portion is mounted on a surface of the battery tray facing away from the battery module; the sealing cover is arranged on the battery tray and used for covering the battery module.

10. A vehicle characterized by comprising the battery pack according to any one of claims 1 to 9.