CN218896752U

CN218896752U - Battery pack

Info

Publication number: CN218896752U
Application number: CN202223370183.5U
Authority: CN
Inventors: 曲凡多; 成传胜
Original assignee: Svolt Energy Technology Co Ltd
Current assignee: Svolt Energy Technology Co Ltd
Priority date: 2022-12-12
Filing date: 2022-12-12
Publication date: 2023-04-21
Anticipated expiration: 2032-12-12

Abstract

The utility model discloses a battery pack, which comprises: a housing having a receiving cavity therein; the battery cells are arranged in the accommodating cavity; the backup pad, the backup pad has linkage segment and supporting segment, the linkage segment centre gripping is adjacent two between the electric core and with the two of this linkage segment of centre gripping electric core links to each other, the supporting segment is located the below of linkage segment and with the supporting segment links to each other, the supporting segment stretches out the lower surface of electric core, the electric core be in under the support of supporting plate with hold the bottom surface interval setting in chamber. The battery pack provided by the embodiment of the utility model has the advantages of being not easy to damage due to bottom impact, high in reliability and the like.

Description

Battery pack

Technical Field

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

Background

In the battery pack in the related art, the battery cells are attached to the bottom plate of the battery pack, and when the bottom of the battery pack is impacted, the stress can be transmitted to the battery cells through the bottom plate of the battery pack, so that the battery cells are easy to damage.

Disclosure of Invention

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, the utility model provides the battery pack which has the advantages of being not easy to damage due to bottom impact, high in reliability and the like.

To achieve the above object, an embodiment according to a first aspect of the present utility model proposes a battery pack including: a housing having a receiving cavity therein; the battery cells are arranged in the accommodating cavity; the backup pad, the backup pad has linkage segment and supporting segment, the linkage segment centre gripping is adjacent two between the electric core and with the two of this linkage segment of centre gripping electric core links to each other, the supporting segment is located the below of linkage segment and with the supporting segment links to each other, the supporting segment stretches out the lower surface of electric core, the electric core be in under the support of supporting plate with hold the bottom surface interval setting in chamber.

The battery pack provided by the embodiment of the utility model has the advantages of being not easy to damage due to bottom impact, high in reliability and the like.

In addition, the battery pack according to the above-described embodiment of the present utility model may have the following additional technical features:

according to one embodiment of the utility model, a plurality of support plates are arranged, and each two adjacent battery cells are provided with a support plate.

According to one embodiment of the utility model, the connecting section is bonded to two electric cores clamping the connecting section, the upper ends of the electric cores are bonded to the top surface of the accommodating cavity, and the lower ends of the supporting plates are bonded to the bottom surface of the accommodating cavity.

According to one embodiment of the utility model, the battery pack further comprises a water cooling plate, the water cooling plate is arranged above the plurality of electric cells and connected with the upper ends of the plurality of electric cells, and a cooling liquid flow channel is arranged in the supporting plate.

According to one embodiment of the utility model, each two adjacent support plates, the lower surface of the battery cell between the two adjacent support plates and the bottom surface of the accommodating cavity jointly define an exhaust channel, and a pressure relief valve is arranged at the lower end of the battery cell between the two adjacent support plates, and is suitable for being communicated with the exhaust channel.

According to one embodiment of the utility model, the lower ends of the two opposite surfaces of the supporting section in the thickness direction are provided with lower stabilizing wings supported on the bottom surface of the accommodating cavity and/or the upper ends of the two opposite surfaces of the supporting section in the thickness direction are provided with upper stabilizing wings for supporting the battery cell.

According to one embodiment of the utility model, the lower edge of the supporting plate is provided with a plurality of gaps which are arranged at intervals.

According to one embodiment of the utility model, the support plate is a hollow piece, or the connection section has a filling groove penetrating the support plate in the thickness direction, the filling groove being filled with a filling material.

According to one embodiment of the utility model, the support plate is a nylon material piece, a polypropylene material piece or an aluminum piece.

According to one embodiment of the utility model, the distance between the lower end of the battery cell and the bottom surface of the accommodating cavity is 0.5% -40% of the height of the battery cell, the thickness of the supporting plate is 0.5% -40% of the length of the accommodating cavity in the thickness direction of the supporting plate, and the height of the connecting section is more than or equal to 2% of the total height of the supporting plate.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

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

Fig. 2 is a partial schematic structure of a battery pack according to some embodiments of the present utility model.

Fig. 3 is a partial schematic structure of a battery pack according to other embodiments of the present utility model.

Fig. 4 is a partial schematic structure of a battery pack according to other embodiments of the present utility model.

Fig. 5 is a partial schematic structure of a battery pack according to other embodiments of the present utility model.

Fig. 6 is a partial schematic structure of a battery pack according to other embodiments of the present utility model.

Reference numerals: the battery pack 1, the housing 10, the battery cell 20, the support plate 30, the connecting section 31, the support section 32, the cooling liquid flow channel 33, the lower stabilizing fin 34, the upper stabilizing fin 35, the filling groove 36, the notch 37, the water cooling plate 40, the exhaust passage 50, the filling material 60 and the experimental ball 2 for ball impact test.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present utility model. Furthermore, features defining "first", "second" may include one or more such features, either explicitly or implicitly. In the description of the present utility model, unless otherwise indicated, the meaning of "a plurality" is two or more.

In the description of the present utility model, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; 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 will be understood in specific cases by those of ordinary skill in the art.

The battery pack 1 according to the embodiment of the present utility model is described below with reference to the accompanying drawings.

As shown in fig. 1 to 6, a battery pack 1 according to an embodiment of the present utility model includes a case 10, a plurality of battery cells 20, and a support plate 30.

The housing 10 has a receiving chamber therein. A plurality of cells 20 are arranged within the receiving cavity. The support plate 30 has a connection section 31 and a support plate 30, the connection section 31 is clamped between two adjacent cells 20 and is connected with the two cells 20 clamping the connection section 31, the support section 32 is positioned below the connection section 31 and is connected with the support section 32 (the up-down direction is shown by an arrow in the figure), the support section 32 extends out of the lower surface of the cell 20, and the cells 20 are arranged at intervals with the bottom surface of the accommodating cavity under the support of the support plate 30.

According to the battery pack 1 of the embodiment of the utility model, the supporting plate 30 is arranged, so that the connecting section 31 at the upper part of the supporting plate 30 is connected with the battery cell 20, and the supporting section 32 at the lower part of the supporting plate 30 is supported on the bottom surface of the accommodating cavity, so that the battery cell 20 is arranged at intervals with the bottom surface of the accommodating cavity under the support of the supporting plate 30. When the bottom plate of the shell 10 is impacted, the stress of the bottom plate of the shell 10 is firstly transferred to the supporting plate 30 and then transferred to the side face of the battery cell 20, the bottom face of the battery cell 20 is not directly impacted, the extrusion collapsing space between the lower end of the battery cell 20 and the bottom face of the accommodating cavity is ensured, compared with the technical scheme that the battery cell is tightly attached to the bottom plate in the related art, the problem that the stress is directly transferred to the bottom face of the battery cell through the bottom plate when the bottom plate is impacted can be avoided, the battery cell is not easy to damage, and the reliability of the battery pack 1 is improved.

Specifically, as shown in fig. 1, when performing the ball striking test, the bottom wall of the case 10 may be impacted using the ball striking test ball 2. The ball impact test experimental ball 2 may have a diameter of 150 mm and exert a force of 25 kN. The force of the experimental ball 2 for ball impact test acts on the bottom plate of the shell 10, and the electric core 20 is arranged at intervals with the bottom plate under the support of the support plate 30, so that the force can be firstly transmitted to the support plate 30 and then transmitted to the side surface of the electric core 20.

Therefore, the battery pack 1 according to the embodiment of the utility model has advantages of less possibility of damage due to bottom impact, high reliability, and the like.

In some embodiments of the present utility model, as shown in fig. 1 to 6, a battery pack 1 according to an embodiment of the present utility model includes a case 10, a plurality of battery cells 20, and a support plate 30.

Specifically, as shown in fig. 1, a plurality of support plates 30 are provided, and each support plate 30 is disposed between two adjacent cells 20. Thus, the plurality of battery cells 20 can be supported by the plurality of support plates 30, so that the stress of the plurality of battery cells 20 is more uniform.

Optionally, the connection section 31 is bonded to two cells 20 that sandwich the connection section 31. This facilitates the connection of the support plate 30 to the cell 20 and avoids the need for a hole to be drilled in the cell 20.

The upper end of the battery cell 20 is adhered to the top surface of the accommodating cavity, and the lower end of the supporting plate 30 is adhered to the bottom surface of the accommodating cavity. This can further improve the stability and reliability of the battery cell 20 and the support plate 30.

Advantageously, as shown in fig. 1, the battery pack 1 further includes a water cooling plate 40, the water cooling plate 40 is disposed above the plurality of electric cells 20 and connected to the upper ends of the plurality of electric cells 20, and the cooling liquid flow channel 33 is disposed in the support plate 30. This may facilitate cooling and heat dissipation from the cells 20.

More advantageously, as shown in fig. 1, each two adjacent support plates 30, the lower surface of the cell 20 between the two adjacent support plates 30 and the bottom surface of the receiving cavity define together an exhaust channel 50, and the lower end of the cell 20 between the two adjacent support plates 30 is provided with a pressure relief valve adapted to communicate with the exhaust channel 50. This allows the pressure relief valve to direct and exhaust the flue gas through the exhaust passage 50 during pressure relief, avoiding heat build-up.

In some embodiments, as shown in fig. 4, the lower ends of the two opposite surfaces of the support section 32 in the thickness direction are provided with lower stabilizing wings 34 supported on the bottom surface of the accommodating cavity and/or the upper ends of the two opposite surfaces of the support section 32 in the thickness direction are provided with upper stabilizing wings 35 for supporting the battery cells 20. The lower stabilizer 34 may improve the connection stability between the support plate 30 and the bottom surface of the accommodating cavity, so as to improve the stability of the battery cell 20, and the upper stabilizer 35 may improve the connection stability between the battery cell 20 and the support plate 30.

In particular, the upper stabilizer 35 and the lower stabilizer 34 may have a certain elasticity and have a bending section for increasing the elasticity. This reduces the force transfer to the cell 20.

In some embodiments, as shown in fig. 6, the lower edge of the support plate 30 is provided with a plurality of spaced notches 37. This not only reduces the weight of the support plate 30 and the material cost of the support plate 30, thereby reducing the overall weight and cost of the battery pack 1, but also facilitates the flow and discharge of the gas in the exhaust passage 50, avoiding heat from collecting below the battery cells 20.

In some embodiments, the support plate 30 is a hollow member. This can reduce the weight of the support plate 30, and reduce the material cost of the support plate 30, thereby reducing the overall weight and cost of the battery pack 1.

In some embodiments, the connection section 31 has a filling groove 36 penetrating through the support plate 30 in the thickness direction, and the filling groove 36 is filled with the filling material 60. This can reduce the weight of the support plate 30, reduce the material cost of the support plate 30, thereby reducing the overall weight and cost of the battery pack 1, and the filler material can secure the structural strength and support effect of the support plate 30.

Specifically, the filler material 60 may be a buffer material. This can improve the cushioning effect against the impact while ensuring the supporting effect of the supporting plate 30.

Alternatively, the support plate 30 is a nylon material piece, a polypropylene material piece, or an aluminum piece. This may facilitate the manufacture of the support plate 30 and reduce the material cost and weight of the support plate 30.

Further, the distance between the lower end of the battery cell 20 and the bottom surface of the accommodating cavity is 0.5% -40% of the height of the battery cell, the thickness of the supporting plate 30 is 0.5% -40% of the length of the accommodating cavity in the thickness direction of the supporting plate, and specifically, the distance between the lower end of the battery cell 20 and the bottom surface of the accommodating cavity is 5 mm. The thickness of the support plate 30 is 1 mm. Therefore, the space waste can be avoided under the condition that enough crumple space exists below the battery cell 20, and the utilization rate of the space in the shell 10 is improved. The cost and the occupied space of the support plate 30 are reduced while ensuring the structural strength of the support plate 30.

The height of the connecting section 31 is equal to or greater than 2% of the total height of the support plate 30. This ensures that the support plate 30 and the battery cell 20 have a sufficient contact area, ensuring connection reliability.

Specifically, the thickness of the bottom plate of the housing 10 is 3 mm.

The bottom surface of the battery cell 20 may be adhered with a temperature resistant material, an insulating material, or a heat insulating material.

Other constructions and operations of the battery pack 1 according to the embodiment of the present utility model are known to those skilled in the art, and will not be described in detail herein.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery pack, comprising:

a housing having a receiving cavity therein;

the battery cells are arranged in the accommodating cavity;

the backup pad, the backup pad has linkage segment and supporting segment, the linkage segment centre gripping is adjacent two between the electric core and with the two of this linkage segment of centre gripping electric core links to each other, the supporting segment is located the below of linkage segment and with the supporting segment links to each other, the supporting segment stretches out the lower surface of electric core, the electric core be in under the support of supporting plate with hold the bottom surface interval setting in chamber.

2. The battery pack according to claim 1, wherein a plurality of support plates are provided between each two adjacent cells.

3. The battery pack according to claim 1, wherein the connection section is bonded to two cells holding the connection section, an upper end of the cell is bonded to a top surface of the receiving chamber, and a lower end of the support plate is bonded to a bottom surface of the receiving chamber.

4. The battery pack according to claim 1, further comprising a water cooling plate disposed above the plurality of cells and connected to upper ends of the plurality of cells, wherein a coolant flow passage is provided in the support plate.

5. The battery pack according to claim 2, wherein each adjacent two support plates, the lower surface of the cell between the adjacent two support plates and the bottom surface of the receiving chamber together define a vent channel, and the lower end of the cell between the adjacent two support plates is provided with a relief valve adapted to communicate with the vent channel.

6. The battery pack according to claim 1, wherein lower ends of two surfaces of the support section opposite in the thickness direction are provided with lower stabilizing wings supported on the bottom surface of the receiving chamber and/or upper ends of two surfaces of the support section opposite in the thickness direction are provided with upper stabilizing wings supporting the battery cells.

7. The battery pack of claim 1, wherein the lower edge of the support plate is provided with a plurality of spaced apart notches.

8. The battery pack according to claim 1, wherein the support plate is a hollow member, or the connection section has a filling groove penetrating through the support plate in a thickness direction, the filling groove being filled with a filling material.

9. The battery pack of claim 1, wherein the support plate is a nylon material piece, a polypropylene material piece, or an aluminum piece.

10. The battery pack according to claim 1, wherein a distance between a lower end of the battery cell and a bottom surface of the receiving cavity is 0.5% -40% of a height of the battery cell, a thickness of the support plate is 0.5% -40% of a length of the receiving cavity in a thickness direction of the support plate, and a height of the connection section is 2% or more of a total height of the support plate.