CN220474756U - Support structure and battery pack - Google Patents

Abstract

The utility model relates to the technical field of batteries and discloses a support structure and a battery pack, wherein the support structure comprises a plate, mounting pieces and abutting pieces, the two mounting pieces are respectively arranged at two ends of the plate in the length direction, the abutting pieces are arranged in a plurality, the abutting pieces are arranged at intervals at one end of the plate in the width direction, when electric cores are positioned at two sides of the plate in the thickness direction and are abutted against the plate, the mounting pieces are simultaneously abutted against the electric cores from the two ends of the plate in the length direction, the mounting pieces are detachably connected with a box body, so that the support structure and the electric cores are fixed in the box body, and the abutting pieces are abutted against the electric cores from one side of the plate in the width direction, so that vibration of the electric cores during overturning can be reduced. The thickness of the support structure is smaller, the occupation of the inner volume of the battery pack can be reduced, the volume utilization rate and the energy density of the battery pack are improved, and when the battery pack is fixed with the battery cell and the box body, the stress is smaller, the stress concentration of the box body can be prevented, and the strength of the whole battery pack can be improved.

Description

Support structure and battery pack

Technical Field

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

Background

The box body of the current square shell power battery pack adopts a structure with a plurality of cross beams, namely, the cross beams are used for fixing the battery cells, but the width of the cross beams is wider, the occupied space in the battery pack is larger, the utilization rate of the battery pack is lower, and therefore the energy density of the battery pack is lower. If the battery pack is fixed by using fewer beams for occupying less volume in the battery pack, the load of the battery pack is concentrated and the stress born by each beam is larger, which may cause the battery pack to have the defect of insufficient strength and rigidity.

Therefore, a bracket structure and a battery pack are needed to solve the above problems.

Disclosure of Invention

An object of the present utility model is to provide a support structure, which not only can increase the volume utilization rate and energy density of a battery pack, but also can increase the strength of the whole pack.

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

a stent structure comprising:

the battery cells can be arranged on two sides of the plate in the thickness direction and are abutted against the plate;

the two mounting pieces are respectively arranged at two ends of the plate in the length direction, can simultaneously abut against the battery cell from the two ends of the plate in the length direction, and can be fixed with the box body of the battery pack;

the butt piece is provided with a plurality of, and a plurality of the butt piece is in the width direction's of plate one end interval sets up, the butt piece can follow the width direction of plate butt the electric core.

Optionally, the interval department of two adjacent butt spare is provided with dodges the groove, dodge the groove and be in the thickness direction of plate link up, dodge the groove and be used for making the plate and connect two adjacent connection piece of electric core have electric clearance between.

Optionally, one the installed part has two installation department that set up in opposite directions, two the installation department all with the plate is the contained angle setting, the installation department is used for the butt the electric core, just the installation department can with the box is fixed.

Optionally, the mounting portion is provided with a mounting hole, and the mounting portion and the box body are detachably connected through a fixing piece penetrating through the mounting hole.

Optionally, the mounting piece further has a connection portion connected to the mounting portion, the connection portion is disposed overlapping the plate, and the mounting portion is connected to the plate through the connection portion.

Optionally, one of the mounting pieces is provided with one connecting portion, a connecting groove is formed in the connecting portion, and the plate is inserted into the connecting groove and fixed with the connecting portion.

Optionally, the outer surface of the support structure is provided with a layer of insulation.

Another object of the present utility model is to provide a battery pack that has high volume utilization and energy density, and can ensure the strength of the whole pack.

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

the battery pack comprises a plurality of the bracket structures.

Optionally, the battery pack further includes a battery core and a case, the case has a receiving cavity, the battery core has a plurality of columns, and each column of battery core includes a plurality of battery cores sequentially arranged along the length direction of the support structure;

the battery cells are arranged in the accommodating cavity in a plurality of support structures and a plurality of rows, one row or two rows of battery cells are clamped between two adjacent support structures, the abutting pieces of the support structures abut against the top cover of each row of battery cells, the mounting parts of the support structures abut against the two ends of each row of battery cells, and the mounting parts are detachably connected with the box body.

Optionally, a row of the battery cells is clamped between two adjacent support structures, and the battery cells are bonded with the support structures; or alternatively, the first and second heat exchangers may be,

two rows of battery cells are clamped between two adjacent support structures, the battery cells are bonded with the support structures, and the two rows of battery cells clamped between the two adjacent support structures are bonded with each other.

The beneficial effects of the utility model are as follows:

the support structure comprises a plate, two mounting pieces and a plurality of abutting pieces, wherein the two mounting pieces are respectively arranged at two ends of the plate in the length direction, and the plurality of abutting pieces are arranged at one end of the plate in the width direction at intervals. When the battery cell is placed on two sides of the thickness direction of the plate and is abutted against the plate, the mounting piece is abutted against the battery cell from two ends of the length direction of the plate at the same time, and the mounting piece is detachably connected with the box body, so that the fixing of the bracket structure and the battery cell in the box body can be realized. In addition, the abutting piece can abut against the battery core from one side of the width direction of the plate, after the battery pack is assembled, the battery pack needs to be turned over in a whole pack, and the battery core is supported by the abutting piece, so that the vibration of the battery core can be reduced, and the product performance of the battery pack is prevented from being influenced. When the support structure is fixed with the battery core and the box body, only one or two rows of battery cores are clamped between two adjacent support structures so as to meet the limitation of the battery core in all directions, so that the number of the support structures of each battery pack is more and the support structures are uniformly distributed, each support structure bears load, but the stress born by each support structure is smaller, the stress concentration of the box body can be prevented, and the whole pack strength can be improved. And because each support structure only limits one or two rows of electric cores, the strength requirement on the support structure is lower, the thickness of the support structure can be reduced, the occupation of the support structure to the inner volume of the battery pack is further reduced, and the volume utilization rate and the energy density of the battery pack can be improved.

The battery pack provided by the utility model comprises a plurality of the bracket structures, so that the volume utilization rate and the energy density of the battery pack can be improved, and the strength of the whole battery pack can be ensured.

Drawings

Fig. 1 is a schematic structural view of a first view angle of a support structure according to an embodiment of the present utility model;

FIG. 2 is a schematic view of a second view of a support structure according to an embodiment of the present utility model;

FIG. 3 is a schematic view of a third view of a support structure according to an embodiment of the present utility model;

FIG. 4 is a schematic view of a mounting member according to an embodiment of the present utility model;

fig. 5 is an exploded view of a battery pack according to an embodiment of the present utility model;

fig. 6 is a schematic view of a part of the structure of a battery pack according to an embodiment of the present utility model;

FIG. 7 is a cross-sectional view at C-C in FIG. 6;

fig. 8 is a cross-sectional view at D-D in fig. 6.

In the figure:

10. a plate member; 101. an avoidance groove; 102. a mounting notch; 20. a mounting member; 201. a mounting part; 2011. a mounting hole; 202. a connection part; 2021. a connecting groove; 30. an abutment;

1. a support structure; 2. a battery cell; 21. a top cover; 3. a case; 4. a fixing member; 5. structural adhesive; 6. an aerogel.

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.

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", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, 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 technical scheme of the utility model is further described below by the specific embodiments with reference to the accompanying drawings.

As shown in fig. 1 to 4, the present embodiment provides a bracket structure 1, which includes a plate 10, two mounting members 20 and a plurality of abutting members 30, wherein the two mounting members 20 are respectively disposed at two ends of the plate 10 in the length direction, the plurality of abutting members 30 are disposed at intervals at one end of the plate 10 in the width direction. When the battery cell 2 is fixed by the support structure 1, in order to keep the relative positions of the battery cell 2 and the support structure 1 consistent, when the battery cell 2 is placed on two sides of the plate 10 in the thickness direction and is abutted against the plate 10, the mounting piece 20 is abutted against the battery cell 2 from two ends of the plate 10 in the length direction simultaneously, namely, the mounting piece 20 can limit the movement of the battery cell 2 along the length direction of the plate 10, and the mounting piece 20 is detachably connected with the box 3, so that the fixation of the support structure 1 and the battery cell 2 in the box 3 can be realized. Further, when the battery cell 2 is assembled, since the battery cell 2 is placed upside down in the case 3 of the battery pack, and the top cover 21 of the battery cell 2 faces the bottom of the case 3, the abutment member 30 abuts against the battery cell 2 from one side in the width direction of the plate member 10, that is, the abutment member 30 faces the bottom of the case 3 and abuts against the top cover 21 of the battery cell 2. The battery cell 2 is placed in the box 3 in an inverted mode, the abutting piece 30 supports the battery cell 2, after the battery pack is assembled, the battery pack needs to be turned over in a whole pack, and the abutting piece 30 is used for supporting the battery cell 2, so that vibration of the battery cell 2 can be reduced, and the influence on the product performance of the battery pack is avoided. Referring to fig. 1, the thickness direction of the plate 10 is referred to as oa direction in fig. 1, the length direction of the plate 10 is referred to as ob direction in fig. 1, and the width direction of the plate 10 is referred to as oc direction in fig. 1.

In addition, when the support structure 1 provided in this embodiment is assembled and fixed with the battery cells 2 and the case 3, only one or two rows of battery cells 2 are sandwiched between two adjacent support structures 1 to meet the limitation of each direction of the battery cells 2, so that the number of the support structures 1 of each battery pack is more and evenly distributed, and each support structure 1 bears the load, but the stress born by each support structure 1 is smaller, so that the stress concentration of the case 3 can be prevented, and the strength of the whole pack can be improved. Moreover, because each support structure 1 only limits one or two rows of battery cells 2, the strength requirement on the support structure 1 is lower, the thickness of the support structure 1 can be reduced, according to the result of multiple tests, the plate 10 of the support structure 1 can meet the strength requirement of the battery pack by selecting an aluminum piece with the thickness of 1.2-1.6 mm, the occupation of the support structure 1 on the inner volume of the battery pack can be further reduced, and the volume utilization rate and the energy density of the battery pack can be improved.

Optionally, a plurality of abutting pieces 30 are arranged at intervals along the length direction of the plate 10, and a gap is formed between the adjacent abutting pieces 30, and the gap is used for avoiding the connecting piece for connecting the poles of the adjacent two battery cells 2. Further, in order to make an electrical gap between the plate 10 and the connection piece connecting the poles of the adjacent two cells 2, an avoiding groove 101 is further provided at the gap, and the avoiding groove 101 penetrates in the thickness direction of the plate 10, that is, the width of the plate 10 at the gap of the adjacent two abutting pieces 30 is smaller than the width of the plate 10 at the abutting piece 30. Preferably, the abutment 30 is an integral structural member with the plate member 10.

Alternatively, as shown in fig. 4, in order to limit the positions of the cells 2 on both sides of the thickness direction of the board 10 by the bracket structure 1, one mounting member 20 has two mounting portions 201 disposed opposite to each other, and both the mounting portions 201 are disposed at an included angle with the board 10. In specific implementation, the included angle between the mounting portion 201 and the plate 10 is preferably 90 °, that is, the mounting portion 201 is perpendicular to the plate 10, so that when the bracket structure 1 is placed in the box 3, the mounting portion 201 can abut against the box 3, and is convenient to fix.

Alternatively, as shown in fig. 4, the mounting portion 201 is provided with a mounting hole 2011, and when the bracket structure 1 and the case 3 are fixed, the fixing member 4 may pass through the mounting hole 2011 to be connected with the case 3. In specific implementation, the fixing piece 4 may be a fastening bolt, and the inner side wall of the box 3 is provided with a fixing hole, the fixing hole corresponds to the mounting hole 2011, and the fixing piece 4 passes through the mounting hole 2011 and is in threaded connection with the fixing hole, so that the detachable connection of the bracket structure 1 and the box 3 can be realized.

Preferably, the plate 10 is further provided with a mounting notch 102, the mounting notch 102 penetrates through the plate 10 in the thickness direction, and the mounting member 20 is disposed at the mounting notch 102. The installation position and shape of the installation notch 102 may be determined according to the corresponding structure of the case 3, and it is only used to make the fixing position of the installation portion 201 and the case 3 abut conveniently.

Alternatively, as shown in fig. 4, the mounting member 20 further has a connection portion 202, the connection portion 202 is connected to the mounting portion 201, and the connection portion 202 may be overlapped and fixed with the board 10 when the mounting member 20 is connected to the board 10. By connecting the plate 10 with the connecting portion 202 that can overlap the plate 10, the overlapping area of the plate 10 and the mount 20 can be increased, and the strength of the connection can be ensured.

In this embodiment, one mounting member 20 has one connecting portion 202, and the connecting portion 202 and the mounting portion 201 are integrated, so that the connecting portion 202 and the two mounting portions 201 disposed opposite to each other have a T-shaped structure. In order to facilitate the fixing of the connecting portion 202 and the board 10, the connecting portion 202 is provided with a connecting groove 2021, and the board 10 can be inserted into the connecting groove 2021 and fixed with the connecting portion 202. Compared with the arrangement of two connecting parts 202, one connecting part 202 is connected with one mounting part 201, namely, the connecting part 202 and the mounting part 201 are of an L-shaped structure, the mounting piece 20 of the T-shaped structure is fixed with the plate 10, the assembly process of the mounting piece 20 and the plate 10 can be further simplified, and the fixing of the plate 10 and the mounting piece 20 arranged at one end of the length direction can be realized by one-time positioning. Preferably, the plate member 10 is welded to the connecting portion 202.

Optionally, the outer surface of the support structure 1 is also provided with a layer of insulation. The heat insulating layer is a coating layer formed by coating the plate 10, the mounting piece 20 and the abutting piece 30 with high-temperature-resistant heat insulating materials, and the heat insulating layer can isolate heat conduction between the bracket structure 1 and the battery core 2 and also can prevent the battery core 2 from burning through the bracket structure 1 when thermal runaway occurs.

As shown in fig. 5 to 8, the present embodiment further provides a battery pack, which includes a plurality of the above-mentioned supporting structures 1, so that not only the volume utilization rate and the energy density of the battery pack can be improved, but also the strength of the whole battery pack can be ensured.

Specifically, the battery pack comprises a battery cell 2 and a box body 3, the box body 3 is provided with a containing cavity, the battery cell 2 is provided with a plurality of columns, and each column of battery cells 2 comprises a plurality of battery cells 2 which are sequentially arranged along the length direction of the support structure 1. The plurality of support structures 1 and the plurality of rows of battery cells 2 are all located in the accommodating cavity, the plurality of support structures 1 are arranged at intervals along the thickness direction of the support structures, and one row or two rows of battery cells 2 are clamped between two adjacent support structures 1. The plate 10 of the support structure 1 between two adjacent rows of cells 2 is thinner, so that occupation of the internal space of the battery pack can be reduced, the volume utilization rate and the energy density of the battery pack can be improved, and the plurality of support structures 1 uniformly bear loads, so that the strength of the whole battery pack can be improved. When the battery cell 2 is placed on the surface of the plate 10 of the bracket structure 1 in the thickness direction, the battery cell 2 is placed in the accommodating cavity upside down, the abutting piece 30 of the bracket structure 1 can abut against the top cover 21 of each row of the battery cells 2, the mounting part 201 of the bracket structure 1 can abut against two ends of each row of the battery cells 2, and the mounting part 201 is detachably connected with the box 3 by the fixing piece 4, so that the stable connection of the battery cell 2 and the box 3 is ensured together, and the service performance of the battery pack can be ensured.

Optionally, the number of columns of the cells 2 sandwiched between two adjacent support structures 1 may be determined according to practical requirements. The volume utilization rate of the battery pack can be further improved by reducing the number of the support structures 1, as shown in fig. 5, when two rows of electric cores 2 are clamped between two adjacent support structures 1, besides the electric cores 2 are bonded with the support structures 1, the two rows of electric cores 2 clamped between the two adjacent support structures 1 are bonded with each other, namely, structural adhesive 5 is arranged between the electric cores 2 and the support structures 1, aerogel 6 is arranged between the two adjacent rows of electric cores 2, and the aerogel 6 can play a role in heat insulation and fire prevention. But when a support structure 1 is arranged between every two adjacent rows of the battery cells 2, the stability between the battery cells 2 and the support structure 1 can be further ensured, and each battery cell 2 is adhered to the support structure 1, namely, a structural adhesive 5 is arranged between the battery cell 2 and the support structure 1.

The above embodiments merely illustrate the basic principle and features of the present utility model, and the present utility model is not limited to the above embodiments, but may be varied and altered without departing from the spirit and scope of the present utility model. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (10)

1. Support structure, its characterized in that includes:

the battery cell (2) can be arranged on two sides of the plate (10) in the thickness direction and is abutted against the plate (10);

the two mounting pieces (20) are arranged, the two mounting pieces (20) are respectively arranged at two ends of the plate (10) in the length direction, the mounting pieces (20) can simultaneously abut against the battery cells (2) from the two ends of the plate (10) in the length direction, and the mounting pieces (20) can be fixed with the box body (3) of the battery pack;

and a plurality of abutting pieces (30), wherein a plurality of the abutting pieces (30) are arranged at intervals at one end of the plate (10) in the width direction, and the abutting pieces (30) can abut against the battery cells (2) from the width direction of the plate (10).

2. The bracket structure according to claim 1, wherein an avoidance groove (101) is provided at a distance between two adjacent abutting pieces (30), the avoidance groove (101) penetrates through the plate (10) in a thickness direction, and the avoidance groove (101) is used for enabling an electrical gap to be formed between the plate (10) and a connecting piece connecting two adjacent electric cores (2).

3. The bracket structure according to claim 1, characterized in that one mounting member (20) has two mounting portions (201) disposed opposite to each other, both mounting portions (201) are disposed at an angle with the plate member (10), the mounting portions (201) are adapted to abut against the battery cells (2), and the mounting portions (201) are capable of being fixed with the case (3).

4. A support structure according to claim 3, characterized in that the mounting portion (201) is provided with a mounting hole (2011), the mounting portion (201) being detachably connected to the housing (3) by a fixing member (4) passing through the mounting hole (2011).

5. A bracket structure according to claim 3, characterized in that the mounting member (20) further has a connecting portion (202) connected to the mounting portion (201), the connecting portion (202) being provided overlapping the plate member (10), the mounting portion (201) being connected to the plate member (10) through the connecting portion (202).

6. The bracket structure according to claim 5, wherein one of the mounting members (20) has one of the connecting portions (202), the connecting portion (202) is provided with a connecting groove (2021), and the plate member (10) is inserted into the connecting groove (2021) and fixed to the connecting portion (202).

7. A support structure according to any one of claims 1-6, characterized in that the outer surface of the support structure (1) is provided with a heat insulating layer.

8. Battery pack, characterized in that it comprises a plurality of support structures (1) according to any one of claims 1 to 7.

9. The battery pack according to claim 8, further comprising a battery cell (2) and a case (3), wherein the case (3) has a receiving cavity, the battery cell (2) has a plurality of columns, and each column of the battery cells (2) includes a plurality of the battery cells (2) sequentially arranged along a length direction of the support structure (1);

the battery cell (2) is arranged in the accommodating cavity, one or two rows of battery cells (2) are clamped between two adjacent support structures (1), the abutting piece (30) of the support structure (1) abuts against each row of top cover (21) of the battery cell (2), the mounting part (201) of the support structure (1) abuts against each row of battery cell (2) at two ends, and the mounting part (201) is detachably connected with the box body (3).

10. Battery pack according to claim 9, characterized in that a row of said cells (2) is sandwiched between two adjacent support structures (1), said cells (2) being glued to said support structures (1); or alternatively, the first and second heat exchangers may be,

two rows of battery cells (2) are clamped between two adjacent support structures (1), the battery cells (2) are bonded with the support structures (1), and the two rows of battery cells (2) clamped between the two adjacent support structures (1) are bonded with each other.