CN220873752U

CN220873752U - Battery pack

Info

Publication number: CN220873752U
Application number: CN202322642526.7U
Authority: CN
Inventors: 李祥; 洪涛
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2023-09-27
Filing date: 2023-09-27
Publication date: 2024-04-30
Anticipated expiration: 2033-09-27

Abstract

The utility model provides a battery pack, which comprises a lower shell, and a battery module, a high-voltage electric component and a low-voltage electric component which are arranged in the lower shell; the lower shell comprises a bottom guard plate and a battery frame arranged on the bottom guard plate, a first installation area, a second installation area and a third installation area are sequentially formed in the battery frame in the front-back direction, the high-voltage electric component is arranged in the first installation area, the battery module is arranged in the second installation area, and the low-voltage electric component is arranged in the third installation area. The battery pack can realize the separate arrangement of high and low voltage electricity, avoid the mutual influence of the high and low voltage electricity and improve the service life and the safety of the electricity.

Description

Battery pack

Technical Field

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

Background

The power battery pack is used as a core component of the electric automobile, integrates the functions of an oil tank and an engine of the oil automobile, and is an energy storage and power output device of the whole automobile. The high-low voltage electric components in the existing power battery pack are usually arranged together and are separated from the battery cell module to a certain extent, so that electric separation can be realized, but due to the fact that the high-low voltage electric components are arranged together, the high-low voltage electric components and the low-voltage electric components still can be influenced mutually, and further electric parts are damaged, and the service life and safety of the battery pack are prolonged.

Disclosure of utility model

In view of this, the present utility model aims to provide a battery pack to achieve high-low voltage electrical separation and improve the electrical service life.

In order to achieve the above purpose, the technical scheme of the utility model is realized as follows:

a battery pack comprising a lower case, a battery module, a high-voltage electric component and a low-voltage electric component which are arranged in the lower case;

The lower shell comprises a bottom guard plate and a battery frame arranged on the bottom guard plate, a first installation area, a second installation area and a third installation area are sequentially formed in the battery frame in the front-back direction, the high-voltage electric component is arranged in the first installation area, the battery module is arranged in the second installation area, and the high-voltage electric component is arranged in the third installation area.

Further, the battery frame comprises a frame and a plurality of cross beams arranged in the frame, wherein the cross beams are arranged at intervals along the front-back direction, and each cross beam extends along the left-right direction; the first mounting region is formed between the frame and the front beam, and the third mounting region is formed between the frame and the rear beam.

Further, the frame comprises two first side beams which are arranged at intervals left and right, and two second side beams which are arranged at intervals front and back; the two ends of each cross beam are respectively connected to the two first side beams, and at least the two ends of the cross beam positioned in the middle are respectively connected with the two first side beams through brackets.

Further, the bracket comprises a first connecting part connected with the top of the cross beam and two second connecting parts respectively connected with two sides of the cross beam; in the left-right direction, the first connecting portion and each second connecting portion are respectively provided with a bending portion which extends outwards and bends, and each bending portion is used for being connected with the first side beam.

Further, each of the first side beams is provided with a mounting beam on the outer side wall, and each mounting beam is provided with a lining for hoisting.

Further, the first side beam, the second side beam, the cross beam and the mounting beam are all integrally formed by rolling steel plates.

Further, a rivet nut is arranged at the bottom of the frame and used for fixing the bottom guard plate.

Further, a liquid cooling plate positioned above the bottom guard plate is arranged in the lower shell, and the battery module, the high-voltage electric component and the low-voltage electric component are all arranged on the liquid cooling plate; the liquid cooling plate is provided with a first maintenance opening corresponding to the first installation area, the bottom of the liquid cooling plate is provided with a detachable first maintenance cover plate, and the first maintenance cover plate is used for sealing the first maintenance opening; the battery frame is provided with a second maintenance opening corresponding to the third installation area at the rear end part, and a detachable second maintenance cover plate is arranged on the battery frame and used for sealing the second maintenance opening.

Further, sealing elements are arranged between the first maintenance cover plate and the liquid cooling plate and between the second maintenance cover plate and the battery frame.

Further, the first maintenance cover plate and the second maintenance cover plate are both cast aluminum pieces; and/or at least one of the first maintenance cover plate and the second maintenance cover plate is provided with a reinforcing rib.

Compared with the prior art, the utility model has the following advantages:

According to the battery pack, the first installation area, the second installation area and the third installation area which are sequentially arranged in front of and behind are divided in the lower shell, and the high-voltage electric component, the battery module and the low-voltage electric component are respectively arranged in the installation areas, so that the high-voltage electric component and the low-voltage electric component can be separated, the purpose of separating the high-voltage electric component from the low-voltage electric component is achieved, the two are prevented from being influenced by each other, and therefore the electric service life and the safety are improved.

And moreover, the anti-extrusion capacity of the side part of the battery pack can be improved through the arrangement of the cross beam, the side collision performance is improved, and the safety of the battery pack is ensured. The crossbeam passes through the support frame and is in the frame, and the setting of support can further promote the anti extrusion ability of battery package lateral part, promotes collision security. The support mainly comprises first connecting portion and second connecting portion to and locate the portion of bending on first connecting portion and the second connecting portion, and accessible portion of bending makes the support connect the top and the two lateral parts of crossbeam respectively, can promote the crossbeam in whole package X to, Z to connection stability, and then promotes the side and bumps the performance. The mounting beams are arranged on the outer side walls of the first side beams of the frame, and the side collision safety of the whole bag is further improved on the basis of the cross beams and the supports. The first boundary beam, the second boundary beam, the cross beam and the mounting beam are all formed by integrally rolling steel plates, so that the wall thickness is reduced and the weight is reduced while the structural strength is ensured, and further the energy density and the light weight of the battery are improved.

In addition, the bottom guard plate is fixed on the frame through the rivet nut, so that the production and the processing are convenient, and the disassembly and assembly convenience is high. The liquid cooling plate is arranged in the lower shell, the temperature of the battery module can be regulated, the battery module is in a good working state, the liquid cooling plate and the battery frame are respectively provided with a first maintenance cover plate and a second maintenance cover plate at positions corresponding to the high-low voltage electric components, and the maintenance of the high-low voltage electric components is facilitated. Sealing elements are arranged between the first maintenance cover plate and the liquid cooling plate and between the second maintenance cover plate and the battery frame, and sundries such as dust are prevented from entering the battery pack when the maintenance cover plate is closed. The first maintenance cover plate and the second maintenance cover plate are both made of aluminum castings, and the first maintenance cover plate and the second maintenance cover plate are provided with reinforcing ribs, so that the strength of the maintenance cover plate can be ensured, and the long-term use is facilitated.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

fig. 1 is a schematic view of a battery pack according to an embodiment of the present utility model;

Fig. 2 is a schematic view showing a partial structure of a battery pack according to an embodiment of the present utility model;

fig. 3 is a schematic view of a battery frame according to an embodiment of the present utility model;

FIG. 4 is an enlarged view at A of FIG. 3;

FIG. 5 is a schematic view of a structure of a bracket according to an embodiment of the present utility model;

FIG. 6 is a schematic structural diagram of a first maintenance cover plate according to an embodiment of the present utility model when the first maintenance cover plate is assembled on a liquid cooling plate;

FIG. 7 is an enlarged view at A of FIG. 6;

FIG. 8 is a schematic structural view of a second repair cover plate according to an embodiment of the utility model;

Reference numerals illustrate:

1. A lower housing; 2. a bottom guard board;

3. A battery frame; 301. a frame; 3011. a first side rail; 3012. a second side rail;

302. A cross beam; 303. a bracket; 3031. a first connection portion; 3032. a second connecting portion;

4. An upper cover plate; 5. mounting a beam; 6. a bushing; 7. a liquid cooling plate; 8. a first maintenance opening; 9. a first maintenance cover plate; 10. a second maintenance opening; 11. a second maintenance cover plate; 12. a seal; 13. reinforcing ribs.

Detailed Description

It should be noted that, without conflict, the embodiments of the present utility model and features of the embodiments may be combined with each other.

In the description of the present utility model, it should be noted that, if terms indicating an orientation or positional relationship such as "upper", "lower", "inner", "outer", etc. are presented, they are based on the orientation or positional relationship shown in the drawings, only for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and the like, if any, are also used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Taking the battery pack structure described in the present utility model as an example, the terms "up, down, left, right, front, and rear" used in the embodiments are defined based on the up-down direction (also referred to as the height direction, or the whole pack Z direction), the left-right direction (also referred to as the width direction, or the whole pack Y direction), and the front-back direction (also referred to as the length direction, or the whole pack X direction) of the battery pack.

Furthermore, in the description of the present utility model, the terms "mounted," "connected," and "connected," are to be construed broadly, unless otherwise specifically defined. For example, the connection can be fixed connection, detachable connection or integrated connection; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art in combination with specific cases.

The utility model will be described in detail below with reference to the drawings in connection with embodiments.

The embodiment relates to a battery pack, which can realize the separation of high-voltage and low-voltage electric components, avoid the mutual influence of the high-voltage and low-voltage electric components and improve the service life and the safety of the electric components.

In the whole structure, the battery pack of the embodiment comprises a lower shell 1, and a battery module, a high-voltage electric component and a low-voltage electric component which are arranged in the lower shell 1;

The lower case 1 includes a bottom cover plate 2, and a battery frame 3 provided on the bottom cover plate 2, in which a first installation area, a second installation area, and a third installation area are sequentially formed in the battery frame 3 in the front-rear direction, the high-voltage electric component is provided in the first installation area, the battery module is provided in the second installation area, and the third electric component is provided in the third installation area.

According to the battery pack, the first installation area, the second installation area and the third installation area which are sequentially arranged in front and back are divided in the lower shell 1, and the high-voltage electric component, the battery module and the low-voltage electric component are respectively arranged in the installation areas, so that the high-voltage electric component and the low-voltage electric component can be separated, the purpose of separating the high-voltage electric component from the low-voltage electric component is achieved, the two are prevented from being influenced by each other, and therefore the electric service life and the safety are improved.

Based on the above overall description, an exemplary structure of the battery pack of the present embodiment is shown in fig. 1 to 3, and includes a lower case 1, and a battery module, a high-voltage electric assembly, and a low-voltage electric assembly provided in the lower case 1, and an upper cover plate 4 is fastened to the corresponding lower case 1.

Specifically, lower casing 1 includes backplate 2 to and locate the battery frame 3 on backplate 2, in the fore-and-aft direction, be formed with first installation region, second installation region and third installation region in proper order around in the battery frame 3, high-voltage electric component locates in the first installation region, battery module locates in the second installation region, low-voltage electric component locates in the third installation region, separate high-voltage electric component and low-voltage electric component through battery module, realized that high-low voltage electric component separates to arrange, avoid the two to influence each other, promoted electric life and security.

Also, as a preferred embodiment, as shown in fig. 3, the battery frame 3 includes a frame 301, and a plurality of cross members 302 provided in the frame 301, the plurality of cross members 302 being arranged at intervals in the front-rear direction, and each of the cross members 302 being arranged to extend in the left-right direction, wherein a first mounting region is formed between the frame 301 and the front cross member 302, a third mounting region is formed between the frame 301 and the rear cross member 302, and a second mounting region is formed between the first mounting region and the third mounting region, and the anti-extrusion capability of the side portion of the battery pack can be improved by the arrangement of the cross members 302, ensuring the safety of the battery pack.

Specifically, referring to fig. 3 and 4, the frame 301 in this embodiment includes two first side beams 3011 arranged at a left-right interval, and two second side beams 3012 arranged at a front-back interval, two ends of each cross beam 302 are respectively connected to the two first side beams 3011, and two ends of the cross beam 302 at least in the middle are respectively connected to the first side beams 3011 through brackets 303, so that the anti-extrusion capability of the battery pack side portion can be further improved by the brackets 303, and the side collision safety is improved.

As shown in fig. 5, the bracket 303 includes a first connection portion 3031 connected to the top of the beam 302, and two second connection portions 3032 connected to two sides of the beam 302, where in the left-right direction, the first connection portion 3031 and each second connection portion 3032 have bending portions that extend outwards and bend, and each bending portion is used to connect to the first side beam 3011, and the top and two sides of the beam 302 are connected to each other through the bracket 303, so that the connection stability of the beam 302 in the X direction and the Z direction of the whole package can be improved.

Here, as a preferred embodiment, as shown in fig. 1 and 2, the mounting beams 5 are provided on the outer side walls of the first side beams 3011, the bushings 6 for hoisting are provided on the mounting beams 5, and the mounting beams 5 further improve the side collision capability of the whole battery pack on the basis of the cross beams 302 and the brackets 303, thereby improving the collision safety of the battery pack.

It is worth mentioning that the first side beam 3011, the second side beam 3012, the cross beam 302 and the mounting beam 5 are all integrally formed by rolling steel plates, so that the wall thickness is reduced and the weight is reduced while the structural strength is ensured, and further the energy density and the weight of the battery are improved.

Furthermore, as a preferred implementation form, the bottom of the frame 301 is provided with a rivet nut, and because the bottom guard plate 2 of the battery pack is an aluminum profile, and the aluminum profile cannot be welded with a steel piece, the bottom guard plate is fixed by rivet screws and rivet nuts, and when the battery pack is installed, the bottom guard plate 2 and the frame 301 can be fixed into a whole by driving the rivet screws into the rivet nuts, thereby facilitating the processing, the installation and the disassembly, and improving the working efficiency.

It should be noted that, as a preferred implementation manner, referring to fig. 6 and 7, the liquid cooling plate 7 located above the bottom protection plate 2 is disposed in the lower casing 1, the battery module, the high-voltage electric component and the low-voltage electric component are all disposed on the liquid cooling plate 7, the liquid cooling plate 7 is further provided with a first maintenance opening 8 corresponding to the first installation area, a detachable first maintenance cover plate 9 is disposed at the bottom of the liquid cooling plate 7, the first maintenance cover plate 9 is used for sealing the first maintenance opening 8, a second maintenance opening 10 corresponding to the third installation area is disposed at the rear end of the battery frame 3, and a detachable second maintenance cover plate 11 is disposed on the battery frame 3, and the second maintenance cover plate 11 is used for sealing the second maintenance opening 10.

During specific implementation, the high-voltage electric component comprises BDU, high-voltage modules of BMS and the like, the low-voltage electric component comprises low-voltage modules of BMS, corresponding maintenance openings are formed in corresponding installation areas of the liquid cooling plate 7 and the battery frame 3, maintenance of vulnerable parts in the battery pack is facilitated, and maintenance cover plates are arranged at the maintenance openings, so that the sealing performance of the battery pack in normal use is guaranteed.

Here, as a preferred implementation form, as shown in fig. 8, between the first maintenance cover plate 9 and the liquid cooling plate 7, and between the second maintenance cover plate 11 and the battery frame 3, sealing elements 12 are respectively provided, and in a specific implementation, the sealing elements 12 may be common sealing foam, so that the sealing foam can prevent external dust and sundries from entering the battery pack.

Furthermore, as a preferred embodiment, as shown in fig. 8, the first repair cover plate 9 and the second repair cover plate 11 are both made of aluminum castings, and the first repair cover plate 9 and the second repair cover plate 11 are each provided with a reinforcing rib 13.

It can be understood that the weight can be reduced by using the aluminum casting, the strength of the first maintenance cover plate 9 and the second maintenance cover plate 11 can be improved on the basis of the weight reduction of the aluminum casting by the arrangement of the reinforcing ribs 13, and, of course, each maintenance cover plate can also be replaced by integrally roll forming of a steel plate for the purposes of reducing the cost and improving the structural strength.

Specifically, the number and arrangement of the reinforcing ribs 13 may be set according to the actual structural reinforcement requirement, for example, the reinforcing ribs 13 on the second repair cover 11 are specifically configured to include a plurality of right triangle structures and isosceles triangle structures arranged side by side.

The foregoing description of the preferred embodiments of the utility model is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the utility model.

Claims

1. A battery pack, characterized in that:

comprises a lower shell, a battery module, a high-voltage electric component and a low-voltage electric component, wherein the battery module, the high-voltage electric component and the low-voltage electric component are arranged in the lower shell;

2. The battery pack according to claim 1, wherein:

The battery frame comprises a frame and a plurality of cross beams arranged in the frame, wherein the cross beams are arranged at intervals along the front-back direction, and each cross beam extends along the left-right direction;

The first mounting region is formed between the frame and the front beam, and the third mounting region is formed between the frame and the rear beam.

3. The battery pack according to claim 2, wherein:

The frame comprises two first side beams which are arranged at intervals left and right, and two second side beams which are arranged at intervals front and back;

The two ends of each cross beam are respectively connected to the two first side beams, and at least the two ends of the cross beam positioned in the middle are respectively connected with the two first side beams through brackets.

4. A battery pack according to claim 3, wherein:

The bracket comprises a first connecting part and two second connecting parts, wherein the first connecting part is used for being connected with the top of the cross beam, and the two second connecting parts are respectively used for being connected with the two sides of the cross beam;

In the left-right direction, the first connecting portion and each second connecting portion are respectively provided with a bending portion which extends outwards and bends, and each bending portion is used for being connected with the first side beam.

5. A battery pack according to claim 3, wherein:

And mounting beams are arranged on the outer side walls of the first side beams, and bushings for hoisting are arranged on the mounting beams.

6. The battery pack according to claim 5, wherein:

The first side beam, the second side beam, the cross beam and the mounting beam are all integrally formed by rolling steel plates.

7. The battery pack according to claim 2, wherein:

And a rivet nut is arranged at the bottom of the frame and used for fixing the bottom guard plate.

8. The battery pack according to any one of claims 1 to 7, wherein:

a liquid cooling plate positioned above the bottom guard plate is arranged in the lower shell, and the battery module, the high-voltage electric component and the low-voltage electric component are all arranged on the liquid cooling plate;

The liquid cooling plate is provided with a first maintenance opening corresponding to the first installation area, the bottom of the liquid cooling plate is provided with a detachable first maintenance cover plate, and the first maintenance cover plate is used for sealing the first maintenance opening;

The battery frame is provided with a second maintenance opening corresponding to the third installation area at the rear end part, and a detachable second maintenance cover plate is arranged on the battery frame and used for sealing the second maintenance opening.

9. The battery pack of claim 8, wherein:

Sealing elements are arranged between the first maintenance cover plate and the liquid cooling plate and between the second maintenance cover plate and the battery frame.

10. The battery pack of claim 8, wherein:

the first maintenance cover plate and the second maintenance cover plate are both made of aluminum castings; and/or at least one of the first maintenance cover plate and the second maintenance cover plate is provided with a reinforcing rib.