CN221057586U - Battery box and battery pack - Google Patents

Abstract

The utility model discloses a battery box and a battery pack, which belong to the technical field of power batteries, wherein the battery box is provided with an installation space for accommodating a battery module, the battery box comprises a bottom plate and a supporting frame connected with the bottom plate, the supporting frame is configured to fix the battery module, and the battery box is also provided with an energy absorption space between the bottom plate and the installation space. The battery box and the battery pack provided by the utility model can better protect the battery module and have higher reliability.

Description

Battery box and battery pack

Technical Field

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

Background

Among the prior art, the battery package generally includes the box, and the box includes the bottom plate, sets up at the peripheral frame of bottom plate and the apron of lid on the frame, and bottom plate, frame and apron enclose and establish the accommodation chamber that is used for holding battery module. The battery module is arranged in the accommodating cavity, and the bottom of the battery module is directly contacted with the bottom plate, namely, the bottom plate directly bears the weight of the battery module.

However, when the bottom of the box collides with other objects due to the fact that the battery module is directly contacted with the bottom plate, the battery cells of the battery module are easily damaged by extrusion due to the fact that buffering does not exist between the battery module and the bottom plate, so that the box formed by the bottom plate and the frame in the prior art cannot effectively protect the battery module, and an improvement space exists.

Therefore, it is desirable to provide a novel battery case and a battery pack, so as to solve the above technical problems in the prior art.

Disclosure of utility model

The utility model aims to provide a battery box body and a battery pack, which can better protect a battery module and have higher reliability.

The technical scheme adopted by the utility model is as follows:

The battery box body is provided with an installation space for accommodating the battery module, the battery box body comprises a bottom plate and a supporting frame connected to the bottom plate, the supporting frame is used for fixing the battery module, and the battery box body is further provided with an energy absorption space between the bottom plate and the installation space.

Optionally, the base plate has a recess facing away from the mounting space, the recess being configured to form at least part of the energy absorbing space.

Optionally, the battery box further includes a buffer member, where the buffer member is disposed in the energy absorbing space.

Optionally, the buffer piece is any one of a foam pad, a silica gel pad, a rubber pad and a heat-conducting rubber pad.

Optionally, the supporting frame includes a beam and a frame, where the beam and the frame are both connected to the bottom plate, and the beam and the frame can cooperate to form the installation space.

Optionally, the plurality of beams are arranged at intervals along a first direction, and the plurality of beams are matched with the frame to form a plurality of installation spaces arranged at intervals along the first direction, and each installation space and the bottom plate are provided with an energy absorption space therebetween.

Optionally, a sealing element is arranged between the supporting frame and the bottom plate.

Optionally, the battery box further includes a fixing rivet, where the fixing rivet is disposed on the support frame and the bottom plate through an FDS process, and is connected with the support frame and the bottom plate in a sealing manner.

Another object of the present utility model is to provide a battery pack, which specifically includes a battery module and a battery case according to any one of the above aspects, wherein the battery module is fixed on a support frame of the battery case and is located in the installation space.

Optionally, the battery module includes a battery cell and a liquid cooling plate, the liquid cooling plate is disposed at the bottom of the battery module, and the battery cell is disposed on the liquid cooling plate.

The utility model has the beneficial effects that:

The utility model provides a battery box and a battery pack, wherein the battery box is provided with an installation space and an energy absorption space, the battery box comprises a bottom plate and a supporting frame, the supporting frame is used for fixing a battery module, the energy absorption space is arranged between the bottom plate and the installation space, the battery module is arranged in the installation space, and when the bottom plate collides with other objects, the energy absorption space between the bottom plate and the battery module can be used for buffering, so that the battery module can not be directly subjected to larger external force, the probability that an electric core of the battery module is damaged by extrusion is reduced, the battery box can effectively protect the battery module, and the battery pack has higher reliability.

Drawings

FIG. 1 is a top view of a portion of a battery pack according to an embodiment of the present utility model;

FIG. 2 is a cross-sectional view at A-A in FIG. 1;

FIG. 3 is a partial enlarged view at B in FIG. 2;

FIG. 4 is an enlarged view of a portion of FIG. 2 at C;

fig. 5 is a partial enlarged view at D in fig. 2.

In the figure:

100. An installation space; 200. an energy absorbing space; 1. a bottom plate; 11. pit; 2. a support frame; 21. a cross beam; 22. a frame; 23. a receiving structure; 3. a buffer member; 4. fixing a rivet; 5. a seal; 10. a battery module; 101. a fixed ear; 102. a liquid cooling plate; 20. and a connecting piece.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the drawings related to the present utility model are shown.

It should be noted that: like reference numerals and letters denote like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

The first direction in this embodiment is the X direction in fig. 1, that is, the length direction of the battery case; the second direction is the Y direction in fig. 1, that is, the width direction of the battery case, and the first direction and the second direction are perpendicular to each other.

Referring to fig. 1 to 3, in the present embodiment, the battery case has an installation space 100 for accommodating a battery module 10, and the battery case includes a base plate 1 and a support frame 2 connected to the base plate 1, the support frame 2 is configured to fix the battery module 10, and the battery case further has an energy absorption space 200 between the base plate 1 and the installation space 100.

The battery box in this embodiment has installation space 100 and energy-absorbing space 200, and the battery box includes bottom plate 1 and braced frame 2, braced frame 2 fixes battery module 10, and energy-absorbing space 200 is located between bottom plate 1 and installation space 100, and battery module 10 is located installation space 100, when bottom plate 1 and other objects take place the striking, can cushion through energy-absorbing space 200 between bottom plate 1 and the battery module 10 for battery module 10 can not directly receive great external force, and then reduces the probability that the electric core of battery module 10 suffered the extrusion damage, makes battery box can protect battery module 10 effectively, has higher reliability.

As shown in fig. 1 and 2, the supporting frame 2 includes a beam 21 and a frame 22, the beam 21 and the frame 22 are connected to the base plate 1, and the beam 21 and the frame 22 can be matched to form the installation space 100. The frame 22 in this embodiment is disposed at the edge of the top surface of the bottom plate 1 along the circumferential direction of the bottom plate 1, that is, the frame 22 in this embodiment is annular, and the frame 22 and the bottom plate 1 are mutually matched and enclose to form a containing cavity for containing the battery module 10 and the cross beam 21.

Further, the cross beam 21 extends in the second direction, and both ends in the second direction are connected to the frame 22, respectively. In this embodiment, a plurality of beams 21 are disposed at intervals along a first direction, and a plurality of installation spaces 100 are formed in cooperation with the frame 22 at intervals along the first direction, and each installation space 100 and the base plate 1 have one energy absorbing space 200 therebetween. Each installation space 100 can be used for installing the battery module 10, and the energy absorption space 200 is arranged below each battery module 10 to ensure the protection of each battery module 10, and the battery module 10 positioned at the center of the battery box body can be effectively protected, so that the battery module 10 has higher reliability. It is understood that the battery module 10 may not be mounted in the mounting space 100, but other components may be mounted, which is not limited in this embodiment.

Further, in the present embodiment, the base plate 1 has a recess 11 recessed away from the installation space 100, and the recess 11 is configured to form at least part of the energy absorbing space 200. At least part of the energy absorbing space 200 is formed by the pits 11 on the bottom plate 1, thereby ensuring the energy absorbing effect of the energy absorbing space 200, fully utilizing the bottom plate 1 and simplifying the structure of the battery box body, and further achieving the effects of reducing weight and manufacturing cost.

In this embodiment, a plurality of pits 11 may be provided, all the pits 11 may be used to form the energy absorbing space 200, or some of the pits 11 may be used to form the energy absorbing space 200, and other pits 11 may be used to place other components, which is not limited in this embodiment. Specifically, the bottom plate 1 is made of steel, and the pits 11 are formed by stamping from sheet metal, which will not be described in detail herein.

With continued reference to fig. 3, optionally, the battery case further includes a buffer member 3, where the buffer member 3 is disposed in the energy absorbing space 200. The buffer member 3 is used for buffering the force transmitted to the battery module 10 by the base plate 1, and can also avoid hard contact between the battery module 10 and the base plate 1 and direct collision between the battery module 10 and the base plate 1, so as to further improve the effect of protecting the battery module 10; in order to achieve a better buffering effect, the buffer member 3 is completely filled in the energy absorbing space 200, thereby increasing the contact area with the battery module 10 and achieving a better impact resistance.

In this embodiment, the buffer member 3 is any one of a foam pad, a silica gel pad, a rubber pad, and a heat conductive rubber pad. The material of the cushion material 3 is not particularly limited herein, as long as it has a certain elasticity and can be insulated. Preferably, the buffer member 3 is a foam pad, and the foam pad has a heat insulation effect, so that the heat insulation performance of the battery box body can be improved, and the battery box body is light in material and low in production cost, and the weight and manufacturing cost of the battery box body can be reduced.

Further alternatively, when the pit 11 is provided in plurality, the energy absorbing space 200 is provided in plurality, the plurality of energy absorbing spaces 200 and the plurality of cushioning members 3 may be in one-to-one correspondence, and each cushioning member 3 is provided in the energy absorbing space 200 corresponding thereto. It will be appreciated that there may also be portions of the energy absorbing space 200 where no cushioning members 3 are provided, which is not limited in this embodiment.

With continued reference to fig. 1 and 4, a sealing member 5 is disposed between the support frame 2 and the base plate 1. Specifically, the sealing member 5 is disposed at the connection between the support frame 2 and the base plate 1, and the sealing member 5 is used for sealing the connection gap between the support frame 2 and the base plate 1, thereby ensuring the connection between the support frame 2 and the base plate 1.

In order to prevent the sealing member 5 from slipping between the support frame 2 and the base plate 1, thereby further improving the sealing effect, as shown in fig. 4 and 5, at least one of the second connection portions of the rim 22 and the base plate 1 is provided with a receiving structure 23 toward the other. The sealing member 5 is arranged in the accommodating structure 23, so as to be used for sealing a gap between the frame 22 and the bottom plate 1, and further realize the waterproof and dustproof functions of the battery box body.

Specifically, as shown in fig. 4, in this embodiment, the frame 22 is provided with a receiving structure 23, and the receiving structure 23 cooperates with the second connecting portion to form a chamber for accommodating the sealing member 5, that is, the edge of the bottom plate 1 is not provided with the receiving structure 23, so that the structural strength of the bottom plate 1 can be ensured, and the local thinning of the bottom plate 1 caused by multiple stamping is prevented from affecting the connection between the second connecting portion of the bottom plate 1 and the frame 22.

As shown in fig. 4, the accommodating structure 23 is a U-shaped groove, and can be applied to the case where the frame 22 is wide; as shown in fig. 5, the accommodating structure 23 is a step, and can be applied to a case where the frame 22 is narrow; the specific shape of the accommodating structure 23 is not specifically limited herein, and those skilled in the art may select according to specific requirements, and will not be described herein. Illustratively, the accommodating structure 23 is an annular groove, and the sealing member 5 is correspondingly arranged to be an annular structure so as to ensure the sealing effect around the battery box.

Further, the material of the sealing member 5 may be a foamed silicone material, and the thickness before the compression is 3mm to 6 mm, preferably 5mm, and the thickness after the compression is 2.5 mm. The width of the seal 5 is 6 mm-9 mm.

As shown in fig. 4 and 5, the battery case optionally further includes fixing rivets 4, and the fixing rivets 4 are disposed on the support frame 2 and the base plate 1 through the FDS process and are hermetically connected to both the support frame 2 and the base plate 1. The principle of the FDS (Flow DRILL SCREW, hot-melt self-tapping) process is to melt a base material by using heat generated by high-speed rotation of a screw, to punch the base material by increasing pressure and to make threads on the base material, so that two or more layers of plates are fixed together. The advantage of this process is that the rivet can retain a larger head, thereby facilitating a compression connection of the frame 22 and the second connection; and, the periphery of fixed rivet 4 is provided with the sealing gum ring generally, and the sealing gum ring can have more area of contact with frame 22 and second connecting portion to promote sealed effect.

The present embodiment also provides a battery pack, which includes a battery module 10 and a battery case according to any one of the above schemes, wherein the battery module 10 is fixed on the support frame 2 of the battery case and is located in the installation space 100. The battery module 10 in this embodiment is located in the installation space 100, when the base plate 1 and other objects collide, the energy absorbing space 200 between the base plate 1 and the battery module 10 can be buffered, so that the battery module 10 can not directly receive a larger external force, and the probability that the battery cells of the battery module 10 are damaged by extrusion is reduced, so that the battery box can effectively protect the battery module 10, and the battery box has higher reliability.

Alternatively, as shown in fig. 1 and 3, the battery module 10 has a plurality of fixing lugs 101 spaced apart in the first direction. Each fixing lug 101 is connected with the cross beam 21 or the frame 22 through the connecting piece 20. It should be noted that, in the battery module 10 located at the edge of the battery box, the fixing lug 101 at one side is connected with the frame 22, and the fixing lug 101 at the other side is abutted against the top surface of the beam 21, so as to further improve the supporting effect on the battery module 10; the connecting member 20 in the present embodiment is a bolt, and is not particularly limited here.

In this embodiment, the battery module 10 includes a battery cell and a liquid cooling plate 102, the liquid cooling plate 102 is disposed at the bottom of the battery module 10, and the battery cell is disposed on the liquid cooling plate 102. Through such setting, the electric core can cool through the liquid cooling plate 102 to when bottom plate 1 and other objects take place the striking, can extrude liquid cooling plate 102 earlier, can further strengthen the security of this battery package.

Note that the above is only a preferred embodiment of the present utility model and the technical principle applied. It will be understood by those skilled in the art that the present utility model is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the utility model. Therefore, while the utility model has been described in connection with the above embodiments, the utility model is not limited to the embodiments, but may be embodied in many other equivalent forms without departing from the spirit or scope of the utility model, which is set forth in the following claims.

Claims (10)

1. The battery box body is provided with an installation space (100) for accommodating the battery module (10), and comprises a bottom plate (1) and a supporting frame (2) connected to the bottom plate (1), and is characterized in that the supporting frame (2) is configured to fix the battery module (10), and the battery box body is further provided with an energy absorption space (200) between the bottom plate (1) and the installation space (100).

2. Battery compartment according to claim 1, characterized in that the base plate (1) has a recess (11) recessed away from the installation space (100), which recess (11) is configured to form at least part of the energy absorbing space (200).

3. The battery box according to claim 1, characterized in that the battery box further comprises a buffer (3), which buffer (3) is arranged in the energy absorbing space (200).

4. A battery box according to claim 3, characterized in that the cushioning member (3) is any one of a foam pad, a silica gel pad, a rubber pad, a heat conductive rubber pad.

5. The battery box according to claim 1, wherein the supporting frame (2) comprises a beam (21) and a frame (22), the beam (21) and the frame (22) are both connected to the bottom plate (1), and the beam (21) and the frame (22) can be matched to form the installation space (100).

6. The battery box according to claim 5, wherein a plurality of cross beams (21) are provided, the plurality of cross beams (21) are arranged at intervals along a first direction, and a plurality of installation spaces (100) are formed at intervals along the first direction in cooperation with the frame (22), and one energy absorption space (200) is arranged between each installation space (100) and the bottom plate (1).

7. Battery box according to claim 1, characterized in that a seal (5) is provided between the support frame (2) and the bottom plate (1).

8. The battery box according to any one of claims 1-7, further comprising a fixing rivet (4), wherein the fixing rivet (4) is disposed on the support frame (2) and the bottom plate (1) through an FDS process, and is in sealing connection with both the support frame (2) and the bottom plate (1).

9. Battery pack, characterized by comprising a battery module (10) and a battery box according to any one of claims 1-8, wherein the battery module (10) is fixed on a support frame (2) of the battery box and is located in the installation space (100).

10. The battery pack according to claim 9, wherein the battery module (10) includes a battery cell and a liquid cooling plate (102), the liquid cooling plate (102) is disposed at a bottom of the battery module (10), and the battery cell is disposed on the liquid cooling plate (102).