CN218385588U

CN218385588U - Box, battery package and vehicle under battery package

Info

Publication number: CN218385588U
Application number: CN202220883813.XU
Authority: CN
Inventors: 杨小亮; 郭军; 徐超; 刘东秦; 柳志民
Original assignee: Beijing Chehejia Automobile Technology Co Ltd
Current assignee: Beijing Chehejia Automobile Technology Co Ltd
Priority date: 2022-04-17
Filing date: 2022-04-17
Publication date: 2023-01-24
Anticipated expiration: 2032-04-17

Abstract

The utility model discloses a box, battery package and vehicle under battery package, battery package under the box include underframe and bottom cooling plate, are equipped with the curb plate on the underframe, and the battery that battery package has holds the partial side shaping in the curb plate in chamber, and the curb plate separates along the relative both ends interval of underframe circumference, and the bottom cooling plate links to each other with the underframe, and the battery holds the bottom surface shaping in the bottom cooling plate in chamber. The utility model provides a battery package lower box has light in weight, with low costs, with last box connection convenient advantage.

Description

Battery pack lower box body, battery pack and vehicle

Technical Field

The utility model relates to an automobile parts technical field, concretely relates to box, battery package and vehicle under battery package.

Background

The new energy automobile has gained rapid development in recent years by virtue of various advantages of low energy consumption, excellent driving performance, environmental friendliness, high-tech addition and the like. New energy automobile's power battery system, battery package promptly generally includes the battery box and installs battery, thermal management system and the electrical system in the battery box, and wherein, the battery box includes box under box on the battery package and the battery package, and the battery package links to each other with the automobile body through the battery package and realizes the installation on the automobile body. In the related art, the lower box body of the battery pack has the defects of heavy weight, high cost and inconvenient connection with the upper box body.

SUMMERY OF THE UTILITY MODEL

The present invention aims at solving at least one of the technical problems in the related art to a certain extent.

Therefore, the embodiment of the utility model provides a box under battery package, this box under battery package has that weight is little, with low costs, with last box connection convenient advantage.

The embodiment of the utility model also provides a battery package.

The embodiment of the utility model provides a vehicle is proposed again.

The lower box body of the battery pack comprises a lower frame and a bottom cooling plate, wherein the lower frame is provided with a side plate, part of side surfaces of a battery accommodating cavity of the battery pack are formed on the side plate, and the side plate is spaced along two opposite ends of the lower frame in the circumferential direction; the bottom cooling plate is connected with the lower frame, and the bottom surface of the battery accommodating cavity is formed in the bottom cooling plate.

According to the utility model discloses the box under the battery package, the curb plate separates along the relative both ends interval of circumference of underframe, and the curb plate is not the crown plate of end to end linking promptly, and the curb plate only can the shaping battery hold the part side in chamber, and the curb plate only need satisfy can install connector and/or water injection well choke can, and the weight of this underframe is littleer, and the cost is lower, and the underframe is convenient with being connected of the last box of battery package.

In some embodiments, the lower frame further comprises a first cross beam, a first longitudinal beam, a second cross beam and a second longitudinal beam which are connected end to end, the side plates comprise a first side plate arranged on the first cross beam and a second side plate arranged on the second cross beam, and at least one of the first side plate and the second side plate forms a connector mounting position and a water nozzle mounting position.

In some embodiments, the upper end surface of the first longitudinal beam, the upper end surface of the second longitudinal beam, the upper end surface of the first side plate and the upper end surface of the second side plate are in head-to-tail smooth engagement, and together form a curved surface attached to the end surface of the upper box body of the battery pack.

In some embodiments, the lower case of the battery pack further includes a guard plate, the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam form a hollow hole in a surrounding manner, the bottom cooling plate and the guard plate are both connected to at least one of the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam, and the bottom cooling plate and the guard plate respectively close an upper end opening and a lower end opening of the hollow hole.

In some embodiments, the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam are surrounded to form a hollow hole, the lower frame further includes a reinforcing transverse rib and a reinforcing longitudinal rib, the reinforcing transverse rib and the reinforcing longitudinal rib are connected and located in the hollow hole, two ends of the reinforcing transverse rib are respectively connected with the first longitudinal beam and the second longitudinal beam, and two ends of the reinforcing longitudinal rib are respectively connected with the first cross beam and the second cross beam.

In some embodiments, the lower frame further includes a connecting plate disposed on a circumferential surface of the hollow hole, the bottom cooling plate is fitted in the hollow hole, and the bottom cooling plate is connected to the connecting plate and closes the hollow hole.

In some embodiments, the upper end surface of the connecting plate is coplanar with the upper end surfaces of the transverse reinforcing rib and the longitudinal reinforcing rib, and the bottom cooling plate abuts against the transverse reinforcing rib and the longitudinal reinforcing rib.

In some embodiments, the connecting plate extends circumferentially of the bottom cooling plate and is joined end to end, and the bottom cooling plate is joined to the connecting plate by friction welding.

In some embodiments, the fender is in abutting contact with a lower end face of each of the first cross member, the first longitudinal member, the second cross member, and the second longitudinal member and is connected thereto by friction welding.

In some embodiments, the lower frame is integrally formed.

The battery pack according to the embodiment of the utility model comprises an upper box body, a lower box body, a battery management system and a high-voltage electrical assembly, wherein the lower box body is the battery pack lower box body as in any one of the above embodiments, the lower box body is connected with the upper box body, and a battery accommodating cavity is formed between the lower box body and the upper box body; the battery, the battery management system and the high-voltage electrical assembly are all accommodated in the battery accommodating cavity.

According to the utility model discloses the technical advantage of battery package is the same with the technical advantage of box under the battery package of above-mentioned embodiment, and it is no longer repeated here.

The vehicle according to the embodiment of the present invention includes the battery pack as in the above embodiment.

According to the utility model discloses the technical advantage of vehicle is the same with the technical advantage of the battery package of above-mentioned embodiment, and it is no longer repeated here.

Drawings

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

Fig. 2 is an exploded view of a battery pack according to an embodiment of the present invention.

Fig. 3 is an exploded view of the lower case and the battery in the battery pack according to the embodiment of the present invention.

Fig. 4 is a cross-sectional view of a battery pack according to an embodiment of the present invention.

Reference numerals:

100. a battery pack; 1. a battery pack lower box body; 2. an upper box body; 3. a battery; 4. a battery management system; 5. a high voltage electrical assembly; 11. a lower frame; 111. a first side plate; 112. a second side plate; 113. a first cross member; 114. a second cross member; 115. a first stringer; 116. a second stringer; 117. reinforcing the transverse ribs; 118. reinforcing the longitudinal ribs; 119. a connecting plate; 1110. hollowing out holes; 1111. a curved surface; 12. a bottom cooling plate; 13. and (4) protecting the plate.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The applicant has found that when the upper case of the battery pack is integrated with the vehicle body, the lower case of the battery pack is generally required to be mounted on the vehicle body from bottom to top to be connected with the upper case of the battery pack when the battery pack is assembled. However, the lower case of the battery pack in the related art is generally provided with end-to-end annular side plates for surrounding a limit battery system (a battery, a battery management system and a high-voltage electrical assembly), the side surfaces of a battery accommodating cavity of the battery pack are all formed on the side plates, and the side plates are also used for installing connectors and water nozzles. This setting leads to the weight of battery package lower box big, with high costs, with last box connection difficulty.

In order to solve the above problem, a lower case 1 of a battery pack according to an embodiment of the present invention is provided below with reference to fig. 1 to 4.

The lower case 1 of the battery pack according to the embodiment of the present invention includes a lower frame 11 and a bottom cooling plate 12. The lower frame 11 is provided with side plates, part of side surfaces of the battery accommodating cavities of the battery pack are formed on the side plates, and the side plates are spaced along two circumferentially opposite ends of the lower frame 11. A bottom cooling plate 12 is connected to the lower frame 11, and the bottom surface of the battery receiving cavity is formed in the bottom cooling plate 12.

According to the utility model discloses case 1 under the battery package, the curb plate separates along the relative both ends interval of circumference of underframe 11, and the curb plate is not the crown plate of end to end linking promptly, and the curb plate only can the shaping battery hold the part side in chamber, the curb plate only need satisfy can install connector and/or water injection well choke can, from this the weight of underframe 11 is littleer, and the cost is lower, and underframe 11 is convenient with being connected of the last case 2 of battery package.

Moreover, when the lower frame 11 is scratched and deformed and needs to be replaced, the replacement cost can be further reduced.

In some embodiments, as shown in fig. 1, the lower frame 11 further includes a first cross member 113, a first longitudinal member 115, a second cross member 114, and a second longitudinal member 116 connected end to end. The side plates comprise a first side plate 111 arranged on the first cross beam 113 and a second side plate 112 arranged on the second cross beam 114, and at least one of the first side plate 111 and the second side plate 112 forms a connector mounting position and a water nozzle mounting position.

Therefore, the lower frame 11 only forms the front side and the rear side of the battery accommodating cavity while satisfying the installation of the connector and the water nozzle, and the lower frame 11 has lower weight and lower cost. Moreover, the side plates of the left side surface and the right side surface of the battery accommodating cavity are arranged on the vehicle body, so that the integration level of the battery pack 100 and the vehicle body is higher, and the weight and the cost of the whole vehicle are further reduced.

In some embodiments, as shown in fig. 1, the upper end surface of the first longitudinal beam 115, the upper end surface of the second longitudinal beam 116, the upper end surface of the first side plate 111, and the upper end surface of the second side plate 112 are joined end to end in a smooth manner, and together form a curved surface 1111 that fits the end surface of the upper case 2 of the battery pack.

Accordingly, as shown in fig. 2, the upper end surface of the lower case 1 of the battery pack is also a curved surface matching the curved surface 1111, so that the upper end surface of the lower case 1 of the battery pack is in contact with the lower end surface of the upper case 2 of the battery pack, and the connection sealing performance between the upper end surface and the lower end surface is higher.

The upper battery pack case 2 and the lower battery pack case 1 are connected by bolts, and a sealing ring is arranged between the upper battery pack case and the lower battery pack case to ensure the connection sealing property. Wherein, underframe 11 is equipped with spacing step in curved surface 1111 department for spacing sealing washer to guarantee the sealing washer and realize the sealed reliability between box 2 and the battery package lower box 1 on the battery package.

In some embodiments, as shown in fig. 1, fig. 2, and fig. 4, the lower case 1 of the battery pack further includes a protective plate 13, the first cross beam 113, the first longitudinal beam 115, the second cross beam 114, and the second longitudinal beam 116 surround to form a hollow hole 1110, the bottom cooling plate 12 and the protective plate 13 are both connected to at least one of the first cross beam 113, the first longitudinal beam 115, the second cross beam 114, and the second longitudinal beam 116, and the bottom cooling plate 12 and the protective plate 13 respectively close an upper end opening and a lower end opening of the hollow hole 1110.

That is, the bottom cooling plate 12 and the shield plate 13 are spaced apart in the height direction, and a hollow cavity is formed therebetween. Therefore, when the guard plate 13 is deformed due to collision, the hollow cavity absorbs and buffers kinetic energy, the bottom cooling plate 12 and the battery 3 are effectively prevented from being deformed and damaged, and the service performance and the service life of the battery pack 100 are ensured.

In some embodiments, as shown in fig. 1 and 2, the lower frame 11 further includes a reinforcing transverse rib 117 and a reinforcing longitudinal rib 118, the reinforcing transverse rib 117 and the reinforcing longitudinal rib 118 are connected and located in the hollow hole 1110, two ends of the reinforcing transverse rib 117 are respectively connected to the first longitudinal beam 115 and the second longitudinal beam 116, and two ends of the reinforcing longitudinal rib 118 are respectively connected to the first cross beam 113 and the second cross beam 114.

The reinforcing transverse ribs 117 and the reinforcing longitudinal ribs 118 divide the hollow holes 1110 into a plurality of parts, so that the structural strength of the lower frame 11 is effectively improved, the lower frame 11 is not easy to deform after being collided, and the service performance and the service life of the battery pack 100 are further improved.

Specifically, as shown in fig. 1, the number of the transverse reinforcing ribs 117 is three, the first cross member 113, the second cross member 114, and the three transverse reinforcing ribs 117 are arranged at intervals in the longitudinal direction, the number of the longitudinal reinforcing ribs 118 is one, and the longitudinal reinforcing ribs 118 are arranged at equal intervals in the lateral direction with the first longitudinal member 115 and the second longitudinal member 116.

In some embodiments, as shown in fig. 1, the lower frame 11 further includes a connection plate 119 disposed on the circumference of the hollow hole 1110, the bottom cooling plate 12 is fitted in the hollow hole 1110, and the bottom cooling plate 12 is connected to the connection plate 119 and closes the hollow hole 1110.

The hollow-out holes 1110 are sealed through the bottom cooling plate 12, so that the sealing of the lower end of the battery accommodating cavity is guaranteed, and external dust and liquid are effectively prevented from entering the battery accommodating cavity.

Specifically, the upper end surface of the bottom cooling plate 12 is smoothly joined to each of the first cross member 113, the first longitudinal member 115, the second cross member 114, and the second longitudinal member 116.

In some embodiments, as shown in fig. 4, the upper end surface of the connecting plate 119 is coplanar with the upper end surfaces of the transverse reinforcing rib 117 and the longitudinal reinforcing rib 118, and the bottom cooling plate 12 abuts against the transverse reinforcing rib 117 and the longitudinal reinforcing rib 118.

From this, strengthen horizontal muscle 117 and strengthen vertical muscle 118 and support bottom cooling plate 12 to the realization is to bottom cooling plate 12 spacing at the direction of height, effectively guarantees bottom cooling plate 12 and connecting plate 119's stability of being connected.

In some embodiments, the webs 119 extend circumferentially around the bottom cooling plate 12 and are joined end to end, and the bottom cooling plate 12 is joined to the webs 119 by friction welding.

That is, the connecting plate 119 is an annular plate, and the connection between the bottom cooling plate 12 and the connecting plate 119 is realized by friction welding, so that the sealing performance between the bottom cooling plate 12 and the connecting plate 119 is also ensured while the connection between the bottom cooling plate 12 and the connecting plate 119 is ensured.

Or, the bottom cooling plate 12 may be connected to the connecting plate 119 by means of bolting, blind riveting, press riveting, blind rivet, rotary tapping, or the like, and the bottom cooling plate 12 and the connecting plate 119 may be sealed by a sealing ring or sealant.

In some embodiments, the fender 13 is in abutting contact with a lower end face of each of the first cross member 113, the first longitudinal member 115, the second cross member 114, and the second longitudinal member 116 and is connected thereto by friction welding.

Through the mode of friction welding, when guaranteeing each connection in backplate 13 and first crossbeam 113, first longeron 115, second crossbeam 114 and second longeron 116, also guaranteed the connection leakproofness of each in backplate 13 and first crossbeam 113, first longeron 115, second crossbeam 114 and second longeron 116, further improved the waterproof leakproofness of battery accommodation chamber.

Or, the protection plate 13 may be connected to the lower frame 11 by means of bolt connection, rivet nut, press rivet nut, blind rivet, rotary tapping rivet, or the like, and the sealing between the protection plate 13 and the lower frame 11 is achieved by a sealing ring or sealant.

In some embodiments, the lower frame 11 is integrally formed.

Specifically, the lower frame 11 is integrally formed by die casting, so that the lower frame 11 has high structural strength and integration level, and is simple in manufacturing process and low in cost.

According to the utility model discloses battery package 100 includes box 2, lower box, battery 3, battery management system 4 and high-voltage electrical assembly 5. The lower box is the lower box 1 of the battery pack of any of the above embodiments, the lower box is connected with the upper box 2, and a battery accommodating cavity is formed between the lower box and the upper box 2. The battery 3, the battery management system 4 and the high voltage electrical assembly 5 are all housed in a battery housing cavity.

The technical advantages of the battery pack 100 according to the embodiment of the present invention are the same as those of the battery pack lower case 1 according to the above embodiment, and are not described herein again.

The vehicle according to the embodiment of the present invention includes the battery pack 100 as in the above embodiment.

The technical advantages of the vehicle according to the embodiment of the present invention are the same as those of the battery pack 100 according to the above embodiment, and are not described herein again.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship indicated based on the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, a first feature "on" or "under" a second feature may be directly contacting the second feature or the first and second features may be indirectly contacting the second feature through intervening media. Also, a first feature "on," "above," and "over" a second feature may be directly on or obliquely above the second feature, or simply mean that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the present disclosure, the terms "one embodiment," "some embodiments," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations to the above embodiments by those of ordinary skill in the art are intended to be within the scope of the present invention.

Claims

1. The utility model provides a box under battery package which characterized in that includes:

the battery pack comprises a lower frame, a battery pack and a battery pack, wherein a side plate is arranged on the lower frame, part of the side surface of a battery accommodating cavity of the battery pack is formed in the side plate, and the side plate is spaced along two opposite ends of the lower frame in the circumferential direction; and

and the bottom cooling plate is connected with the lower frame, and the bottom surface of the battery accommodating cavity is formed in the bottom cooling plate.

2. The lower box body of the battery pack as claimed in claim 1, wherein the lower frame further comprises a first cross member, a first longitudinal member, a second cross member and a second longitudinal member connected end to end, the side plates comprise a first side plate disposed on the first cross member and a second side plate disposed on the second cross member, and at least one of the first side plate and the second side plate forms a connector mounting position and a water nozzle mounting position.

3. The lower box body of the battery pack as claimed in claim 2, wherein the upper end surface of the first longitudinal beam, the upper end surface of the second longitudinal beam, the upper end surface of the first side plate and the upper end surface of the second side plate are in head-to-tail smooth engagement and jointly form a curved surface attached to the end surface of the upper box body of the battery pack.

4. The battery pack lower case body according to claim 2, further comprising a protective plate, wherein the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam are surrounded to form a hollow hole, the bottom cooling plate and the protective plate are both connected with at least one of the first cross beam, the first longitudinal beam, the second cross beam and the second longitudinal beam, and the bottom cooling plate and the protective plate respectively close an upper end opening and a lower end opening of the hollow hole.

5. The battery pack lower case according to claim 2, wherein the first cross member, the first longitudinal member, the second cross member and the second longitudinal member surround to form a hollow hole, the lower case further comprises a reinforcing transverse rib and a reinforcing longitudinal rib, the reinforcing transverse rib and the reinforcing longitudinal rib are connected to each other and located in the hollow hole, two ends of the reinforcing transverse rib are connected to the first longitudinal member and the second longitudinal member, respectively, and two ends of the reinforcing longitudinal rib are connected to the first cross member and the second cross member, respectively.

6. The battery pack lower case according to claim 5, wherein the lower frame further includes a connection plate provided on a circumferential surface of the hollow hole, the bottom cooling plate is fitted in the hollow hole, and the bottom cooling plate is connected to the connection plate to close the hollow hole.

7. The lower box body of the battery pack as claimed in claim 6, wherein the upper end surface of the connecting plate is coplanar with the upper end surfaces of the transverse reinforcing rib and the longitudinal reinforcing rib, and the bottom cooling plate abuts against the transverse reinforcing rib and the longitudinal reinforcing rib.

8. The battery pack lower case body of claim 6, wherein the connecting plate extends in the circumferential direction of the bottom cooling plate and is connected end to end, and the bottom cooling plate and the connecting plate are connected by friction welding.

9. The battery pack lower case of claim 4, wherein the guard plate is in abutting contact with a lower end surface of each of the first cross member, the first longitudinal member, the second cross member, and the second longitudinal member and is connected thereto by friction welding.

10. The battery pack lower case according to any one of claims 1 to 9, wherein the lower frame is integrally formed.

11. A battery pack, comprising:

an upper box body;

the lower box body is the battery pack lower box body as claimed in any one of claims 1 to 10, the lower box body is connected with the upper box body, and a battery accommodating cavity is formed between the lower box body and the upper box body; and

the battery management system comprises a battery, a battery management system and a high-voltage electric assembly, wherein the battery, the battery management system and the high-voltage electric assembly are all accommodated in the battery accommodating cavity.

12. A vehicle characterized by comprising the battery pack according to claim 11.