CN209071466U - Battery pack and vehicle - Google Patents

Abstract

A battery pack and a vehicle, the battery pack comprises: a battery pack bottom case, the battery pack bottom case has a bottom case beam; a layer of modules, the first layer of modules is mounted on the battery pack bottom case, and the The first-layer module is provided with a first side plate, and the first side plate is connected with the bottom shell beam; a second-layer module is arranged above the first-layer module, and the second-layer module is arranged above the first-layer module. The second-layer module is provided with a second side plate; a side mounting bracket, the lower end of the side mounting bracket is connected with the first side plate, and the upper end of the side mounting bracket is connected with the second side plate; An end fixing plate, the end fixing plate is arranged on both ends of the first-layer module and the second-layer module and is connected with the battery pack bottom case and the side mounting bracket. By designing the structure of the side mounting bracket and the end fixing plate, the battery module can be protected in multiple directions on the side, and the strength and stiffness of the superstructure and the battery pack can be significantly improved, and the first-order modal frequency of the second-layer module can be improved. .

Description

Battery packs and vehicles

technical field

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

Background technique

With the development of electric vehicle technology becoming more and more mature, electric vehicles have gradually become an indispensable means of transportation in people's daily life. In the process of driving, the car will encounter various extremely complex road conditions.

In order to improve the overall battery life of electric vehicles and increase the energy density of battery packs, electric vehicle battery packs are generally designed with a double-layer module structure. Save the overall space of the battery pack, while reducing the quality and cost of the whole pack.

At present, for the double-layer module structure where the module installation point is located on the side plate, the rigidity of the upper module is weak, the first-order mode is low, and it is easy to resonate with the ground excitation during the driving process. At the same time, when the battery pack is subjected to large impact or random vibration conditions, it is easy to cause fatigue of structural parts and shaking of the upper module.

Utility model content

In view of this, the present invention aims to provide a battery pack with high rigidity of the upper layer.

In order to achieve the above object, the technical scheme of the present utility model is achieved in this way:

A battery pack, comprising: a battery pack bottom case, the battery pack bottom case has a bottom case beam; a layer of modules, the first layer of modules is mounted on the battery pack bottom case, and the first layer of the mold The group is provided with a first side plate, the first side plate is connected with the bottom shell beam; a second-layer module, the second-layer module is arranged above the first-layer module, and the second-layer module is A second side plate is provided; a side mounting bracket, the lower end of the side mounting bracket is connected with the first side plate, and the upper end of the side mounting bracket is connected with the second side plate; the end fixing plate, The end fixing plates are arranged on both ends of the first-layer module and the second-layer module and are connected with the battery pack bottom case and the side mounting bracket.

Further, the side mounting bracket is supported between the first side plate and the second side plate so that the lower surface of the second-layer module is spaced from the upper surface of the first-layer module.

Further, both the first side plate and the second side plate include: a side plate body connected with the side of the first-layer module or the second-layer module and a support connected with the side plate body plate, the support plate protrudes in a direction away from the first-layer module or the second-layer module relative to the side plate body, and the lower end of the side mounting bracket supports the first side plate The plates are connected, and the upper end of the side mounting bracket is connected with the support plate of the second side plate.

Further, the support plate is vertically connected with the middle of the side plate body.

Further, both sides of the first-layer module are provided with the first side plates, both sides of the second-layer module are provided with the second side plates, and two adjacent side plates are arranged side by side. The two supporting plates of the second side plate, the side mounting brackets, and the two supporting plates of the two first side plates arranged side by side and adjacent to each other are stacked in sequence.

Further, the side mounting bracket is a box-shaped structure with a hollow cavity.

Further, a reinforcing rib is arranged in the hollow cavity of the side mounting bracket.

Further, the upper part of the end fixing plate is connected with the side mounting bracket, and the lower part of the end fixing plate is connected with the bottom plate of the battery pack bottom case and the bottom case beam.

Further, the lower edge of the terminal fixing plate is provided with a lower flange, the lower flange is connected with the bottom plate of the bottom shell of the battery pack, and the side edge of the lower part of the terminal fixing plate is provided with a side flange, so The side flanging is connected with the bottom shell beam.

Compared with the prior art, the battery pack of the present invention has the following advantages:

1) By designing the structure of the side mounting bracket and the end fixing plate, the battery module can be protected in multiple directions on the side, and the strength and rigidity of the upper structure and the battery pack can be significantly improved, and the first-order level of the second-layer module can be improved. Modal frequency, avoid resonance with ground excitation, reduce the shaking of the upper module of the battery pack due to severe impact, thereby improving the ability of the entire battery pack to resist shock and random vibration, thereby ensuring the overall safety characteristics of the battery pack.

Another object of the present invention is to provide a vehicle having the battery pack as described above.

The vehicle and the above-mentioned battery pack have the same advantages over the prior art, which will not be repeated here.

Description of drawings

The accompanying drawings that constitute a part of the present invention are used to provide further understanding of the present invention, and the schematic embodiments and descriptions of the present invention are used to explain the present invention and do not constitute an improper limitation of the present invention. In the attached image:

1 is a schematic structural diagram of a battery pack according to an embodiment of the present invention;

A partial enlarged view at A in Fig. 2 Fig. 1;

FIG. 3 is a partial enlarged view of B in FIG. 1 .

Description of reference numbers:

battery pack 100,

The first layer module 10, the first side plate 11, the side plate body 11a of the first side plate, the support plate 11b of the first side plate, the second layer module 20, the second side plate 21, the side plate of the second side plate body 21a, support plate 21b of the second side plate, side mounting bracket 30, hollow cavity 31, reinforcing rib 32,

Fixed end 40, bottom flange 41, side flange 42,

Bottom case beam 50 .

Detailed ways

It should be noted that the embodiments of the present invention and the features of the embodiments may be combined with each other under the condition of no conflict.

The present utility model will be described in detail below with reference to the accompanying drawings and in conjunction with the embodiments.

As shown in FIG. 1 , a battery pack 100 according to an embodiment of the present invention includes a battery pack bottom case, a first-layer module 10 , a second-layer module 20 , a side mounting bracket 30 , and an end fixing plate 40 .

The bottom case of the battery pack has a bottom plate and a bottom case beam 50, and the bottom case beam 50 is fixedly connected with the bottom plate to enhance the strength and rigidity of the bottom case of the battery pack.

As shown in FIG. 1 , both the first-layer module 10 and the second-layer module 20 are installed above the bottom shell of the battery pack to form a double-layer module. Each first-level module 10 is divided into two groups spaced apart in the lateral direction, and the gap between the two groups is used for installing structures such as water cooling pipes or wire harness brackets. Correspondingly, the middle of the bottom shell beam 50 may be provided with a gap for avoidance. A plurality of one-layer modules 10 of each group are arranged side by side in the longitudinal direction.

The first layer module 10 is installed on the bottom case of the battery pack, and the first layer module 10 is provided with a first side plate 11, the first side plate 11 is fixedly connected with the side surface of the first layer module 10, and the first side plate 11 is connected with the bottom plate 11. The shell beams 50 are connected, that is to say, the first-layer module 10 is fixedly connected with the bottom shell beam 50 through the first side plate 11 to realize the lateral installation of the first-layer module 10 .

The second-layer module 20 is arranged above the first-layer module 10 , and the second-layer module 20 is provided with a second side plate 21 , and the second side plate 21 is fixedly connected to the side surface of the second-layer module 20 .

The lower end of the side mounting bracket 30 is connected to the first side plate 11, and the upper end of the side mounting bracket 30 is connected to the second side plate 21, that is, the side mounting bracket 30 is located on the side of the second-layer module 20, and the second-layer The module 20 is connected with the first side plate 11 through the second side plate 21 and the side mounting bracket 30, and the side mounting bracket 30 can provide protection for the first-layer module 10 and the second-layer module 20 in the lateral direction, and can protect the first-layer module 10 and the second-layer module 20. The lateral rigidity of the second-layer module 20 is improved.

The end fixing plates 40 are disposed on both ends of the first-layer module 10 and the second-layer module 20 , and the end fixing plates 40 are connected to the bottom case of the battery pack and the side mounting brackets 30 . The end fixing plate 40 can provide protection for the first-layer module 10 and the second-layer module 20 at the end, and fix the side mounting bracket 30 in the longitudinal direction (the width direction of the module), so as to significantly improve the second-layer module 20 longitudinal stiffness.

In this way, on the premise of ensuring the quality requirements of the battery pack 100, the stiffness and strength of the battery pack 100 can be increased, the first-order mode of the whole pack can be improved, the resonance between the whole pack and ground excitation can be avoided, and the vibration of the battery pack 100 can be effectively improved. The anti-fatigue durability and anti-deformation ability of complex working conditions such as shock and shock reduce the risk of fire and explosion of the battery pack 100 under complex working conditions.

According to the battery pack 100 of the embodiment of the present invention, by designing the structure of the side mounting bracket 30 and the end fixing plate 40 , the battery module can be protected in multiple directions on the side, and the superstructure and the battery pack 100 can be significantly improved. It can increase the first-order modal frequency of the second-layer module 20, avoid resonance with the ground excitation, reduce the shaking of the upper-layer module of the battery pack 100 due to severe impact, and improve the impact resistance and resistance of the battery pack 100. The ability to vibrate randomly, thereby ensuring the overall safety feature of the battery pack 100 .

As shown in FIG. 2 , the side mounting brackets 30 are supported between the first side plate 11 and the second side plate 21 so that the lower surface of the second-layer module 20 is spaced from the upper surface of the first-layer module 10 . In this way, the excitation received by the first-layer module 10 can be prevented from being directly transmitted to the second-layer module 20, and the gap between the first-layer module 10 and the second-layer module 20 can be used as a space for heat dissipation.

As shown in FIG. 2 , the first side plate 11 includes: a side plate body 11a and a support plate 11b, the side plate body 11a of the first side plate 11 is connected to the side of the first layer of the module 10, and the support plate of the first side plate 11 11b is connected to the side plate body 11a of the first side plate 11 , and the support plate 11b of the first side plate 11 protrudes in a direction away from the first layer module 10 relative to the side plate body 11a of the first side plate 11 . The support plate 11b of the first side plate 11 and the side plate body 11a of the first side plate 11 may be formed into an integral T-shape. The support plate 11 b of the first side plate 11 is vertically connected to the middle portion of the side plate body 11 a of the first side plate 11 .

As shown in FIG. 2 , the second side plate 21 includes: a side plate body 21a and a support plate 21b, the side plate body 21a of the second side plate 21 is connected to the side of the second-layer module 20, and the support plate of the second side plate 21 21b is connected to the side plate body 21a of the second side plate 21 , and the support plate 21b of the second side plate 21 protrudes in a direction away from the second-layer module 20 relative to the side plate body 21a of the second side plate 21 . The support plate 21b of the second side plate 21 and the side plate body 21a of the second side plate 21 may be formed into an integral T-shape. The support plate 21 b of the second side plate 21 is vertically connected to the middle of the side plate body 21 a of the second side plate 21 .

As shown in FIG. 2 , the lower end of the side mounting bracket 30 is connected to the support plate 11 b of the first side plate 11 , and the upper end of the side mounting bracket 30 is connected to the support plate 21 b of the second side plate 21 . The lower surface of the side mounting bracket 30 is supported on the upper surface of the support plate 11b of the first side plate 11, and the lower wall surface of the side mounting bracket 30 can pass through the support plate 11b of the first side plate 11 and the bottom case beam 50 for multiple passes. The upper surface of the side mounting bracket 30 is attached to the lower surface of the supporting plate 21b of the second side plate 21, and the upper wall surface of the side mounting bracket 30 and the supporting plate 21b of the second side plate 21 can pass through A plurality of threaded connectors are connected. In this way, the first-layer module 10 and the second-layer module 20 can be formed as a whole through the lateral side mounting brackets 30, and through the connection structure between the side mounting brackets 30 and the first side plate 11 and the second side plate 21, The lateral stiffness and vertical stiffness of the second-layer module 20 can be greatly improved.

As shown in FIG. 2 , the side mounting bracket 30 is a box-shaped structure with a hollow cavity 31 . The lateral ends of the side mounting bracket 30 can be opened. The side mounting bracket 30 of the box-shaped structure has the advantages of light weight and high strength, and when subjected to an impact, the side mounting bracket 30 of the box-shaped structure can be deformed and collapsed. To absorb impact energy and protect the battery module inside.

As shown in FIG. 2 , the hollow cavity 31 of the side mounting bracket 30 is provided with a reinforcing rib 32. The reinforcing rib 32 can extend laterally and divide the hollow cavity 31 into a plurality of sub-cavities. The reinforcing rib 32 can enhance the side installation. The strength and stiffness of the bracket 30 .

As shown in FIG. 1 and FIG. 3 , both sides of the first-layer module 10 are provided with first side plates 11 , and both sides of the second-layer module 20 are provided with second side plates 21 . The two support plates of the second side plate 21 , the side mounting brackets 30 , and the two support plates of the two first side plates 11 arranged side by side and adjacent to each other are stacked in sequence.

In some embodiments, as shown in FIG. 1 , the upper part of the end fixing plate 40 is connected with the side mounting bracket 30 , and the lower part of the end fixing plate 40 is connected with the bottom plate of the battery pack bottom case and the bottom case beam 50 . The upper part of the end fixing plate 40 is connected with the end of the side mounting bracket 30 by a screw connection, and the lower part of the end fixing plate 40 is mig welded with the bottom plate and the bottom case beam 50 . The lower edge of the end fixing plate 40 is provided with a lower flange 41, and the lower flange 41 is connected with the bottom plate of the bottom case of the battery pack. The beams 50 are connected. Providing the flange can facilitate the connection between the end fixing plate 40 and the bottom case of the battery pack.

The utility model also discloses a vehicle.

The vehicle according to the embodiment of the present invention includes the battery pack 100 according to any one of the above embodiments. In the vehicle of the embodiment of the present invention, the lateral protection of the battery pack 100 is in place, and the rigidity and strength of the upper layer are high.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the within the scope of protection of the present invention.

Claims (10)

1. A battery pack (100), characterized in that, comprising: a battery pack bottom case, the battery pack bottom case having bottom case beams (50); A first-layer module (10), the first-layer module (10) is mounted on the bottom case of the battery pack, and the first-layer module (10) is provided with a first side plate (11), the first A side plate (11) is connected with the bottom case beam (50); A second-layer module (20), the second-layer module (20) is arranged above the first-layer module (10), and the second-layer module (20) is provided with a second side plate (21); A side mounting bracket (30), the lower end of the side mounting bracket (30) is connected with the first side plate (11), and the upper end of the side mounting bracket (30) is connected with the second side plate ( 21) Connected; An end fixing plate (40), the end fixing plate (40) is arranged on both ends of the first-layer module (10) and the second-layer module (20) and is connected with the battery pack bottom case and the The side mounting brackets (30) are connected. 2. The battery pack (100) according to claim 1, wherein the side mounting bracket (30) is supported between the first side plate (11) and the second side plate (21) so that the lower surface of the second-layer module (20) is spaced apart from the upper surface of the first-layer module (10). 3. The battery pack (100) according to claim 1, wherein the first side plate (11) and the second side plate (21) both comprise: ) or a side plate body connected to the side of the two-layer module (20) and a support plate connected with the side plate body, the support plate is away from the first-layer module (with respect to the side plate body) 10) or extending from the direction of the second-layer module (20), the lower end of the side mounting bracket (30) is connected to the support plate (11b) of the first side plate (11), and the side mounting bracket (30) The upper end of the mounting bracket (30) is connected with the support plate (21b) of the second side plate (21). 4. The battery pack (100) according to claim 3, wherein the support plate is vertically connected to the middle of the side plate body. 5. The battery pack (100) according to claim 3, wherein the first side plates (11) are provided on both sides of the first-layer module (10), and the second-layer module (10) is provided with the first side plates (11) on both sides. Both sides of (20) are provided with the second side plates (21), and the two support plates and the side mounting brackets ( 30), the two supporting plates of the two first side plates (11) that are arranged side by side and adjacent to each other are stacked in sequence. 6. The battery pack (100) according to claim 1, wherein the side mounting bracket (30) is a box-like structure with a hollow cavity (31). 7 . The battery pack ( 100 ) according to claim 6 , wherein a reinforcing rib ( 32 ) is provided in the hollow cavity ( 31 ) of the side mounting bracket ( 30 ). 8 . 8. The battery pack (100) according to any one of claims 1-7, wherein the upper part of the end fixing plate (40) is connected with the side mounting bracket (30), and the end The lower part of the fixing plate (40) is connected with the bottom plate of the battery pack bottom case and the bottom case beam (50). 9 . The battery pack ( 100 ) according to claim 8 , wherein the lower edge of the end fixing plate ( 40 ) is provided with a lower flange ( 41 ), the lower flange ( 41 ) and the The bottom plate of the bottom case of the battery pack is connected, the side edge of the lower part of the end fixing plate (40) is provided with a side flange (42), and the side flange (42) is connected with the bottom case beam (50). 10. A vehicle, characterized by having the battery pack (100) according to any one of claims 1-9.