CN222514969U - Battery pack box, battery pack and electrical equipment - Google Patents

Abstract

The utility model relates to the technical field of power batteries, and particularly provides a box body of a battery pack, the battery pack and electric equipment. The box body of the battery pack comprises a first frame, a second frame, a first bottom plate and a second bottom plate, wherein the first bottom plate is connected to the bottom of the first frame to form a first accommodating cavity, the second bottom plate and the second frame are arranged in the first accommodating cavity, the second bottom plate is connected to the bottom of the second frame to form a second accommodating cavity, the battery cell module of the battery pack is arranged in the second accommodating cavity, the second bottom plate supports the battery cell module, the second frame is fixedly connected to the first frame, and the second bottom plate and the first bottom plate are arranged at intervals. The double-layer frame structure of the box fully utilizes the spare space in the battery pack, and meets the requirements of structural safety and heat preservation performance of the battery pack.

Description

Box body of battery pack, battery pack and electric equipment

Technical Field

The utility model relates to the technical field of power batteries, and particularly provides a box body of a battery pack, the battery pack and electric equipment.

Background

With the development of new energy automobiles, the performance of a power battery pack serving as a core functional component is receiving more and more attention. In the prior art, in general, new energy automobiles with different endurance mileage are matched with battery packs with different capacities, and in order to meet the consistency of the overall vehicle structure, the universality of part adaptation and the requirement of upgrading the vehicle endurance in the later period, the battery packs with large capacity and the battery packs with small capacity can be of the same size.

For the same size specification, the battery pack with small capacity generally has less battery cells, and the battery cells in the battery pack occupy smaller volume, so that the situation that the space in the battery pack is rich and the distribution of the battery cells is unreasonable can occur. The solution of the existing partial battery pack is to increase the distance between each group of battery cells, and separate the battery cell groups by using a wide beam, so that smaller battery cell groups can be distributed relatively uniformly in a large battery box. However, such a method does not fully utilize the space left by the battery to improve the performance of the battery, the space left is divided into a plurality of discontinuous parts, and the excessively dispersed battery cell groups are not beneficial to the integration of the battery pack, the arrangement of the battery cell groups compactly influences the strength, and the problem of cost rise is also caused.

In summary, a case structure of a small battery pack of the same size capable of solving the above-mentioned problems has been proposed.

Disclosure of utility model

The present utility model is directed to solving the above-mentioned technical problem that the space of a small-capacity battery pack of the same size as a conventional-capacity battery pack cannot be reasonably configured.

In order to achieve the object, in a first aspect, the utility model provides a box body of a battery pack, which comprises a first frame, a second frame, a first bottom plate and a second bottom plate, wherein the first bottom plate is connected to the bottom of the first frame to form a first accommodating cavity, the second bottom plate and the second frame are arranged in the first accommodating cavity, the second bottom plate is connected to the bottom of the second frame to form a second accommodating cavity, a battery core module of the battery pack is arranged in the second accommodating cavity, the second bottom plate supports the battery core module, the second frame is fixedly connected to the first frame, and the second bottom plate and the first bottom plate are arranged at intervals.

In an alternative technique of the utility model, the bottom of the first frame extends into the first receiving chamber to form a supporting portion, and the top of the second frame extends outwardly to form a hanging portion, the hanging portion being connected to an upper side of the supporting portion by a fastener in a frame fixing hole.

In an alternative technique of the present utility model, the plurality of sides of the first frame are provided with the supporting portions and the plurality of sides of the second frame are provided with the hanging portions.

In an alternative technique of the utility model, the second floor has flow channels for the passage of fluid.

In an alternative technique of the utility model the second frame comprises a plurality of cross members and a plurality of stringers, the cross members and stringers dividing the second receiving cavity into a plurality of sub-receiving cavities.

In the alternative technology of the utility model, a plurality of mounting holes are arranged on the cross beam and/or the longitudinal beam, the battery cell module is provided with module hanging lugs, and the module hanging lugs are fixed on the mounting holes so that the battery cell module is fixed in a plurality of sub-accommodating cavities.

In an alternative technique of the utility model, the case further includes an upper cover plate coupled to the top surface of the first frame 11.

In an alternative technique of the utility model, the first frame comprises mounting beams.

In a second aspect, the utility model also provides a battery pack comprising the case of any one of the above technical solutions.

In a third aspect, the utility model further provides electric equipment, which comprises the battery pack.

Drawings

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings, in which:

FIG. 1 is an overall schematic of the case of the present utility model after the cell is mounted;

FIG. 2 is a schematic view showing the combination of the first frame 11 and the first bottom plate 13 of the case of the present utility model;

FIG. 3 is a schematic view of the combination of the second frame 12 and the second floor 14 of the case of the present utility model;

Fig. 4 is a schematic view of the entire second frame 12 and second base plate 14 of the case of the present utility model after mounting the battery cells;

fig. 5 is a cross-sectional view of the case of the present utility model after the second frame 12 and the second base plate 14 are mounted with the battery cells;

Fig. 6 is a cross-sectional view of the case of the present utility model after the battery cells are mounted.

Detailed Description

Preferred embodiments of the present utility model are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present utility model, and are not intended to limit the scope of the present utility model. Those skilled in the art can adapt it as desired to suit a particular application.

It should be noted that, in the description of the present utility model, terms such as "inner", "outer", and the like, indicating directions or positional relationships are based on directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the relevant devices or elements 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 ordinal terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In addition, it should be noted that, in the description of the present utility model, unless explicitly specified and limited otherwise, the terms "mounted" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected, mechanically connected or electrically connected, and may be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in the present utility model can be understood by those skilled in the art according to the specific circumstances.

As shown in fig. 1, 2, 3, 4, 5 and 6, a case 1 of a battery pack includes a first frame 11, a second frame 12, a first bottom plate 13 and a second bottom plate 14, the first bottom plate 13 is connected to the bottom of the first frame 11 to form a first accommodating chamber, the second bottom plate 14 and the second frame 12 are disposed in the first accommodating chamber, the second bottom plate 14 is connected to the bottom of the second frame 12 to form a second accommodating chamber for accommodating the battery cells and supporting the battery cells by the second bottom plate 14, and the second frame 12 is fixedly connected to the first frame 11, in particular by connecting the outer circumference of the second frame 12 to the inner circumference of the second frame 12, and the second bottom plate 14 is disposed at a distance from the first bottom plate 13.

The outer periphery of the second frame 12 is connected to the inner periphery of the second frame 12 such that a gap is left between the second frame 12 and the first frame 11 as a crumple space in which the first frame 11 is deformed when the battery pack is collided.

In one embodiment of the present utility model, as shown in fig. 6, a supporting part 111 is provided on the inner side of the bottom of the first frame 11, a hanging part 121 is provided on the outer side of the top of the second frame 12, and the hanging part 121 is connected to the upper side of the supporting part 111 by a fastening member 123 in a frame fixing hole 122, wherein the distance from the bottom surface of the hanging part 121 to the bottom surface of the second bottom plate 14 is smaller than the distance from the top surface of the supporting part 111 to the first bottom plate 13. In this way, the cells in the second receiving chamber are suspended from the first frame 11 by the second frame 12.

Further, as shown in fig. 2 and 3, the first frame 11 has a plurality of sides each having a supporting portion 111 and the second frame 12 has a plurality of sides each having a hanging portion 121, so that a smoother installation is achieved.

Through the scheme, the battery core in the battery pack structure is not in direct contact with the box body structure at the outermost side of the battery pack, namely the first frame 11 and the first bottom plate 13, so that heat exchange between the inside and the outside of the battery pack is avoided to the greatest extent, the double-layer frame structure fully utilizes the spare space in the battery pack, and the collision safety performance of the battery pack is improved.

The second bottom plate 14 has a flow channel for fluid to pass through, i.e. the second bottom plate 14 integrates a heat exchange plate, and the cooling or heating of the cells carried by the second bottom plate is realized by the fluid in the heat exchange flow channel. Due to the spaced arrangement of the second bottom plate 14 and the first bottom plate 13, the heat exchanger plate will not be affected by the outside environment due to direct contact with the outer casing.

In one embodiment of the utility model, as shown in fig. 4, the second frame 12 includes a plurality of cross members and a plurality of stringers, the cross members and stringers dividing the second housing cavity into a plurality of sub-housing cavities within which the cells are disposed.

Because the gap between the second frame 12 and the first frame 11 increases the size of the gap, and then reduces the size of the gap between each cell group, the size of the cross beam and the longitudinal beam forming the second frame 12 can be equal to the size of the cross beam and the longitudinal beam in the conventional battery pack box body, which is beneficial to the standardization of part parts and reduces the cost. Also, by increasing the gap between the second frame 12 and the first frame 11, so that the size of the second accommodating space is reduced, the area of the second bottom plate 14 is reduced, and when the heat exchange plate is integrated on the second bottom plate 14, the required heat exchange plate area is also reduced, which is beneficial to reducing the manufacturing difficulty and cost.

The second frame 12 may be formed by connecting a plurality of sections of profiles as a cross member and a longitudinal member, or may be integrally formed by a die casting process or the like.

The cross beam and/or the longitudinal beam are provided with a plurality of module mounting holes 124, the battery cells in the second accommodating cavity are combined to form a plurality of modules 2, each module 2 is respectively arranged in each sub accommodating cavity, the module 2 is provided with a module hanging lug 22, the module hanging lug 22 is provided with a connecting hole, and the module 2 passes through the connecting hole of the module hanging lug 22 and the module mounting hole 124 through a connecting piece to fix the module 2 to the second frame 12.

The box body 1 further comprises an upper cover plate 15, wherein the upper cover plate 15 is connected to the top surface of the first frame 11 to seal the first accommodating cavity, and the battery cell is isolated from the space outside the box body.

As shown in fig. 2 and 6, the first frame 11 includes a mounting beam 112, where the mounting beam 112 is located at two sides of the first frame and is used for fixedly connecting to electric equipment, such as an electric automobile.

In the embodiments, the box structure of the utility model can avoid safety accidents for reducing the damage to the battery core during collision, simultaneously reduce the heat transfer between the battery core and the external environment, meet the requirements of the structural safety and the heat preservation performance of the battery pack, and simultaneously can continue the specification required by the small-capacity battery pack on part of the structure, thereby reducing part of the cost.

In addition, the utility model also provides a battery pack, which comprises the box body in any one of the technical schemes.

Furthermore, the utility model also provides electric equipment, such as an electric automobile, comprising the battery pack.

Thus far, the technical solution of the present utility model has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present utility model is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present utility model, and such modifications and substitutions will fall within the scope of the present utility model.

Claims (10)

1. A case of a battery pack, characterized by comprising a first frame (11), a second frame (12), a first bottom plate (13) and a second bottom plate (14);

the first bottom plate (13) is connected to the bottom of the first frame (11) to form a first accommodating cavity, and the second bottom plate (14) and the second frame (12) are arranged in the first accommodating cavity;

The second bottom plate (14) is connected to the bottom of the second frame (12) to form a second accommodating cavity, the cell module (2) of the battery pack is arranged in the second accommodating cavity, and the second bottom plate (14) supports the cell module (2);

The second frame (12) is fixedly connected to the first frame (11), and the second bottom plate (14) and the first bottom plate (13) are arranged at intervals.

2. The case according to claim 1, wherein the inner side of the first frame (11) is provided with a supporting portion (111), the outer side of the second frame (12) is provided with a hanging portion (121), and the hanging portion (121) is connected to above the supporting portion (111) by a fastener (123) in a frame fixing hole (122).

3. The case according to claim 2, wherein the plurality of sides of the first frame (11) are provided with the supporting portions (111) and the plurality of sides of the second frame (12) are provided with the hanging portions (121).

4. A tank according to claim 1, wherein the second floor (14) has a flow passage for fluid.

5. The cabinet according to claim 1, wherein the second frame (12) comprises a plurality of cross members and a plurality of side members, the cross members and side members dividing the second receiving chamber into a plurality of sub receiving chambers.

6. The cabinet according to claim 5, wherein,

A plurality of mounting holes (124) are formed in the cross beam and/or the longitudinal beam, and module hangers are arranged on the cell module (2);

The module hanging lugs (22) are fixed on the mounting holes (124) so that the battery cell module (2) is fixed in the plurality of sub-accommodating cavities.

7. The case according to claim 1, further comprising an upper cover plate (15), wherein the upper cover plate (15) is connected to the top surface of the first frame (11).

8. A tank according to claim 1, characterized in that the first frame (11) comprises mounting beams (112).

9. A battery pack comprising the case according to any one of claims 1 to 8.

10. A powered device comprising the battery pack of claim 9.