CN214378667U

CN214378667U - Battery package backplate, battery package and vehicle

Info

Publication number: CN214378667U
Application number: CN202120703670.5U
Authority: CN
Inventors: 李华; 郭军; 徐超
Original assignee: Beijing CHJ Automobile Technology Co Ltd
Current assignee: Beijing CHJ Automobile Technology Co Ltd
Priority date: 2021-04-07
Filing date: 2021-04-07
Publication date: 2021-10-08
Anticipated expiration: 2031-04-07

Abstract

A battery pack backplate, a battery pack, and a vehicle, wherein the battery pack backplate (10) comprises: the reinforced concrete plate comprises a honeycomb plate (1), and a first panel (2), a first reinforcing beam (3) and a second panel (4) which are arranged in sequence; the first stiffening beam (3) divides the space between the first panel (2) and the second panel (4) into a plurality of cavities; the cellular board (1) is arranged in the cavity. The utility model discloses a spatial separation of first stiffening beam (3) between with first panel (2) and second panel (4) becomes a plurality of cavitys to set up honeycomb panel (1) in the cavity, utilize the honeycomb quality light, the big characteristic of bearing has strengthened the intensity of backplate (10) at the bottom of the battery package, and has alleviateed the weight of backplate (10) at the bottom, makes the mechanical properties of battery package (100) more excellent.

Description

Battery package backplate, battery package and vehicle

Technical Field

The utility model relates to a battery package technical field, in particular to backplate, battery package and vehicle at bottom of battery package.

Background

At present, with rapid development of automation and intellectualization, electric automobiles are more and more popular and purchased by the public; the sales volume of the electric automobile is increased, the use frequency is increased, the driving road conditions and the use scenes are more complicated and changeable, and the bottom safety of the battery pack faces more serious challenges.

However, the bottom guard plate of the existing battery pack has large weight and insufficient strength.

SUMMERY OF THE UTILITY MODEL

Objects of the invention

The utility model aims at providing a backplate, battery package and vehicle at bottom of battery package that can solve above-mentioned problem.

(II) technical scheme

In order to solve the above problem, a first aspect of the present invention provides a battery bottom protection plate, including: the first panel, the first stiffening beam and the second panel are arranged in sequence; the first stiffening beam divides a space between the first panel and the second panel into a plurality of cavities; the cellular board is disposed in the cavity.

Optionally, the battery pack bottom guard plate further comprises: and the embedded block is arranged between the first panel and the second panel and is used for connecting the first panel and the second panel.

Optionally, at least two through holes are arranged on the honeycomb plate; the two through holes are oppositely arranged on two opposite sides of the cellular board, and the embedded block is arranged in any one through hole.

Optionally, the battery pack bottom guard plate further comprises: and the frame is arranged at the edges of the first panel and the second panel, is fixedly connected with the first panel and the second panel, and encloses a containing cavity for containing the first reinforcing beam and the honeycomb plate.

Optionally, the frame is fixedly connected to the first reinforcing beam and/or a second reinforcing beam is fixed to a side of the first panel away from the second panel.

Optionally, a plurality of first reinforcing beams are arranged, the plurality of first reinforcing beams are arranged in a criss-cross manner to form a grid structure, and two ends of each first reinforcing beam are fixedly connected with the frame; and a second reinforcing beam is fixed on one side of the first panel, which is far away from the second panel.

Optionally, the frame is provided as a tubular structure, the tubular structure is provided in an annular shape, and a first opening is provided on the frame on a side close to the first panel, and the first opening is used for installing a fastener.

Optionally, a second opening is formed in one side, close to the second panel, of the frame; the second opening is opposite to the first opening and used for installing the fastener; and a cover body which is detachably connected with the second opening and used for hiding the fastener is arranged on the second opening.

Optionally, the first panel is used for connecting with a lower box body of the battery pack; one side of the frame, which is far away from the first panel and the second panel, extends towards the lower box body to form a flange, and the flange is used for being abutted against the lower box body so as to prevent fire from entering the battery pack.

A second aspect of the present invention provides a battery pack, including the battery pack bottom protection plate provided by the first aspect of the present invention.

A third aspect of the present invention provides a vehicle, including a battery pack as provided in the second aspect of the present invention.

(III) advantageous effects

The above technical scheme of the utility model has following profitable technological effect:

the utility model discloses a spatial separation of first stiffening beam between with first panel and the second panel becomes a plurality of cavitys to set up the honeycomb panel in the cavity, utilize the honeycomb quality light, the big characteristic of bearing has strengthened the intensity of backplate at the bottom of the battery package, and has alleviateed the weight of backplate at the bottom, makes the mechanical properties of battery package more excellent.

Drawings

Fig. 1 is a schematic structural view of a battery pack according to the present invention;

fig. 2 is an exploded view of the battery pack of the present invention;

fig. 3 is an exploded view of a battery pack bottom guard plate according to a first embodiment of the present invention;

fig. 4 is a plan view of a honeycomb panel according to a first embodiment of the present invention;

fig. 5 is a perspective view of a honeycomb panel according to a first embodiment of the present invention;

fig. 6 is a schematic cross-sectional structure view of a frame according to a first embodiment of the present invention.

Reference numerals:

1: a honeycomb panel; 2: a first panel; 21: a second reinforcement beam; 3: a first reinforcement beam; 4: a second panel; 5: pre-burying blocks; 6: a frame; 61: a flange; 62: a cover body; 7: a seal ring; 8: a fastener;

10: a bottom guard plate;

100: a battery pack.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings. It should be understood that the description is intended to be illustrative only and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.

In the description of the present invention, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

First embodiment

Referring to fig. 1 to 5, the present embodiment provides a battery pack bottom cover sheet 10 including: the structure comprises a honeycomb plate 1, and a first panel 2, a first stiffening beam 3 and a second panel 4 which are arranged in sequence; the first stiffening beam 3 divides the space between the first panel 2 and the second panel 4 into a plurality of cavities; the cellular board 1 is arranged in the cavity, preferably, the cellular board 1 completely fills the corresponding cavity, so that the structural compactness is improved, and the protection effect of the bottom protection plate 10 can be improved. The bottom cover 10 of the present embodiment is provided at the lowermost layer of the battery pack 100 and connected to the lower case of the battery pack 100, and serves to protect the internal structure of the battery pack 100. The battery package backplate 10 that this embodiment provided passes through first stiffening beam 3 and becomes a plurality of cavitys with the spatial separation between first panel 2 and the second panel 4 to set up honeycomb panel 1 in the cavity, utilize the honeycomb light in quality, the big characteristic of bearing, strengthened the intensity of battery package backplate 10, and alleviateed the weight of backplate 10 at the bottom, made the mechanical properties of battery package 100 more excellent.

In an alternative embodiment, the first panel 2 is provided with a panel reinforcing structure to reinforce the strength of the first panel 2, the reinforcing structure may be a beam structure, such as the second reinforcing beam 21 in fig. 3, the second reinforcing beam 21 is fixed to the side of the first panel 2 away from the second panel 4, the second reinforcing beam 21 may be provided in plurality according to needs, two adjacent second reinforcing beams 21 are spaced apart from each other, and a plurality of second reinforcing beams 21 may be fixed to the first panel 2 in parallel. The second reinforcing beams 21 can also be arranged in a criss-cross manner to form a grid structure, and the honeycomb plate 1 is fixed in each grid according to the strength requirement. The second panel 4 may be provided in the same structure as the first panel 2 as needed.

In an alternative embodiment, the first reinforcement beam 3 is provided in plurality; the plurality of first stiffening beams 3 are arranged in a criss-cross mode to form a grid structure, and both ends of each first stiffening beam 3 are fixedly connected with the frame 6, and are fixed through bonding, welding or bolt connection. Specifically, the number of crossbeam and longeron can be selected according to actual need, for example, as shown in fig. 3, the longeron is 2, and the crossbeam is 3, mutually perpendicular between longeron and the crossbeam, and both just so can enclose the square structure of a piece, hold honeycomb panel 1 through this square structure, and is simple and easy and simple to handle.

In an alternative embodiment, the battery pack backplate 10 is made of an aluminum extruded section or a non-metallic material.

In an alternative embodiment, the battery pack backplate 10 further comprises: pre-buried piece 5 sets up between first panel 2 and second panel 4 for connect first panel 2 and second panel 4, make the structure more firm, specifically, pre-buried piece 5 can be connected with first panel 2 and second panel 4 through modes such as welding or gluing. Optionally, the honeycomb plate 1 is provided with through holes; the embedded block 5 is arranged in the through hole and is fixedly connected with the first panel 2 and the second panel 4, so that the structure is more compact, the mechanical property of the bottom guard plate 10 is more excellent, the embedded block 5 can be further selected to be adhered or welded with the cellular board 1, and the structure is more stable.

In a preferred embodiment, on the basis of the previous embodiment, the cellular board 1 is provided with at least two through holes, the two through holes are oppositely arranged on two opposite sides of the cellular board 1, and an embedded block 5 is arranged in any through hole. Specifically, the two through holes may be symmetrically disposed on two opposite sides of the honeycomb panel 1 with respect to the center of the honeycomb panel 1, or symmetrically disposed on two opposite sides of the honeycomb panel 1 along the axis of the honeycomb panel 1, so that the forces applied to the first panel 2 and the second panel 4 are symmetrical, and the structure of the bottom protection plate is more stable.

In an alternative embodiment, the battery pack backplate 10 further comprises: and the frame 6 is arranged at the edges of the first panel 2 and the second panel 4 and is fixedly connected with the first panel 2 and the second panel 4. Optionally, the frame 6 is disposed in a sealing manner with the first panel 2 and the second panel 4, and the gap is filled by bonding or welding to form a seal, so as to prevent impurities from entering the cavity. Wherein the frame 6 is fixed to the end of the first reinforcing beam 3.

In an alternative embodiment, the bottom protection plate 10 is made of an aluminum extruded section for the frame 6 and the first reinforcing beam 3, an aluminum plate for the first panel 2 and the second panel 4, a honeycomb core plate for middle filling, and heat treatment is performed after the integral brazing is completed, and finally the bottom protection plate is assembled to the power battery pack 100 as an accessory. Specifically, the first panel 2, the frame 6, the first reinforcing beam 3 and the second panel 4 form a plurality of cavities through spatial assembly arrangement, the honeycomb core board is assembled and filled into the cavities, the embedded blocks 5 are arranged, the integral preassembly is completed through gluing, the integral structure is placed into a brazing furnace, and the bottom protection plate 10 is machined through an integral brazing mode; the brazed bottom guard plate 10 part enables the bottom guard plate 10 to achieve ideal mechanical properties through heat treatment; and (4) processing the bottom guard plate 10 after the heat treatment by a PVC spraying process. The forming process of the bottom guard plate 10 is not limited to integral brazing, and can also use processes such as mechanical connection, glue bonding, thermal compounding and the like; the first panel 2 and the second panel 4, and the frame may be replaced with non-metallic materials. However, the whole structure is completed by adopting brazing connection, heat treatment can be carried out, and compared with the traditional gluing process honeycomb plate, the mechanical property is better.

In an alternative embodiment, the frame 6 is fixedly connected to the first reinforcing beam 3, so that the structure is fixed, in particular by gluing or welding.

Referring to fig. 6, in an alternative embodiment, the frame 6 is provided in a tubular structure, and the tubular structure is provided in a ring shape; a first opening is formed in the frame 6 close to one side of the first panel 2; the first opening is used for installing the fastener 8 to fix the battery pack backplate 10 with the body of the battery pack 100, and in addition, since the frame 6 is provided in a tubular structure, the weight of the backplate 10 can be further reduced. And the structure can hide the fastener 8 in the frame 6, prevent the fastener 8 from being exposed outside, and make the bottom protection plate 10 provide better bottom safety protection.

Referring to fig. 6, on the basis of the above embodiment, in the present embodiment, a second opening is provided on the frame 6 near one side of the second panel 4, the second opening is arranged opposite to the first opening, the second opening is used for a fastener 8 to pass through, and the fastener 8 is preferably a bolt. During the installation, stretch into frame 6 with the bolt through the second trompil in to box connection under first trompil and battery package 100 is provided with the internal thread corresponding with the size and the position of bolt in the box under battery package 100. Optionally, a cover 62 is disposed at the second opening, and the cover 62 is covered after the bolts are installed, so as to prevent foreign matters from entering the battery pack 100, and hide the bolts in the frame 6, thereby protecting the bolts. The safety protection level of the bottom protection plate 10 is improved, the fixed point and the sealing failure risk are reduced, and the reliability and the safety performance of the battery pack 100 are improved.

In an alternative embodiment, a plurality of grooves are formed in the frame 6, the bottom of each groove is formed on one side, close to the first panel 2, of the frame 6, the top of each groove is formed on one side, close to the second panel 4, of the frame 6, and openings are formed in the positions of the grooves for installing bolts. When the bolt is installed, the bolt extends into the frame 6 through the groove top and is connected with the lower box body of the battery pack 100 through the opening, and internal threads corresponding to the size and the position of the bolt 8 are arranged in the lower box body of the battery pack 100. The bolts are tightened to the internal threads to secure the backplate to the lower case of the battery pack 100. The groove top can be provided with a cover body according to needs so as to hide the bolt in the groove.

In an alternative embodiment, referring to fig. 6, the first panel 2 is used to connect with the lower case of the battery pack 100; the junction can set up the invasion structure of fire prevention to when preventing the accident, fire gets into in the battery package 100, improves the reliability and the security performance of battery package 100. Specifically, the outer side wall of the frame 6 extends towards the lower box body to form a flange 61; the flange 61 is intended to abut against the lower box for fire protection.

In an alternative embodiment, since the first panel 2 is used for connection with the lower case of the battery pack 100; the first panel 2 can be perforated as required, for example, if the lower box needs to use screws for connection, the first panel 2 can be perforated at the corresponding position in class to avoid the screws. The embedded block 5 can also be punched to avoid screws. If first panel 2 and buried block 5 have all carried out the setting of punching, then preferably seal at the junction of first panel 2 and buried block 5 and handle to prevent that the foreign matter from going into the interior, specifically can seal through bonding or welding at the junction of first panel 2 and buried block 5.

Second embodiment

Referring to fig. 1 and 2, the present embodiment provides a battery pack 100 including a battery pack backplate 10 according to a first embodiment of the present invention.

In an alternative embodiment, the lower case of the battery pack 100 is connected to the battery pack bottom protection plate 10, and a sealing ring 7 is disposed at the connection position to reduce the entry of foreign matters into the battery pack 100, so as to improve the reliability and safety of the battery pack 100 (see fig. 6).

In an alternative embodiment, the sealing ring 7 is disposed on a side of the bolt 8 away from the flange 61, and the flange 61 can prevent flame from invading in case of an accident, so as to protect the sealing ring 7 and improve the safety protection level.

The same parts of this embodiment as those of the first embodiment will not be described herein.

Third embodiment

A third embodiment of the present invention provides a vehicle, including a battery pack 100 as provided by the second embodiment of the present invention.

The same parts of this embodiment as those of the second embodiment will not be described herein.

It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.

Claims

1. A battery package backplate characterized by comprising: the reinforced concrete plate comprises a honeycomb plate (1), and a first panel (2), a first reinforcing beam (3) and a second panel (4) which are arranged in sequence;

the first stiffening beam (3) divides the space between the first panel (2) and the second panel (4) into a plurality of cavities;

the cellular board (1) is arranged in the cavity.

2. The battery pack backplate of claim 1, further comprising:

the embedded block (5) is arranged between the first panel (2) and the second panel (4) and used for connecting the first panel (2) and the second panel (4).

3. The battery pack undergarments of claim 2,

the honeycomb panel is characterized in that at least two through holes are formed in the honeycomb panel (1), the two through holes are arranged on two opposite sides of the honeycomb panel (1) in an opposite mode, and the embedded block (5) is arranged in any one through hole.

4. The battery pack skirt of any one of claims 1-3, further comprising:

and the frame (6) is arranged at the edges of the first panel (2) and the second panel (4) and is fixedly connected with the first panel (2) and the second panel (4), and the frame, the first panel and the second panel enclose to form an accommodating cavity for accommodating the first reinforcing beam (3) and the honeycomb plate (1).

5. The battery pack backplate of claim 4,

the frame (6) is fixedly connected with the first reinforcing beam (3); and/or the presence of a gas in the gas,

and a second reinforcing beam (21) is fixed on one side of the first panel (2) far away from the second panel (4).

6. The battery pack undergarments of claim 5,

the first reinforcing beams (3) are arranged in a plurality, the first reinforcing beams (3) are arranged in a criss-cross mode to form a grid structure, and two ends of each first reinforcing beam (3) are fixedly connected with the frame (6);

the second reinforcing beams (21) are arranged in plurality, and every two adjacent second reinforcing beams (21) are arranged at intervals.

7. The battery pack backplate of claim 4,

the frame (6) is arranged into a tubular structure, and the tubular structure is arranged annularly;

a first opening is formed in the frame (6) close to one side of the first panel (2) and used for installing a fastener (8);

a second opening is formed in the side frame (6) close to one side of the second panel (4), and the second opening is opposite to the first opening and used for installing the fastener (8);

and a cover body which is detachably connected with the second open pore and used for hiding the fastener (8) is arranged on the second open pore.

8. The battery pack backplate of claim 6, wherein the first panel (2) is for connection to a lower case of a battery pack;

the outer side wall of the frame (6) extends towards the lower box body to form a flange (61), and the flange (61) is used for being abutted against the lower box body so as to prevent fire from entering the battery pack.

9. A battery pack comprising the battery pack backplate of any one of claims 1-8.

10. A vehicle characterized by comprising the battery pack according to claim 9.