Battery pack

Abstract

The utility model discloses a battery pack, which comprises a mounting box, a battery pack and a battery pack, the battery pack is arranged in the lower box body and comprises a plurality of battery cells, and each battery cell comprises a main body and a pole arranged at the top of the main body; and the supporting structure is arranged in the mounting box, is arranged at the top of the main body, and is used for receiving the pressure received and transmitted from the upper cover and transmitting the pressure to the main body. According to the battery pack disclosed by the utility model, the supporting structure is arranged in the mounting box, when the upper cover receives pressure, the pressure can be transmitted to the supporting structure, and then the pressure is transmitted to the main body of the battery cell by the supporting structure, so that the condition that the battery cell is damaged or fails due to the fact that the pressure is transmitted to the pole is reduced or avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly to a battery pack. Background Art

[0002] The power battery is the power source of an electric vehicle. After the battery pack is installed on the vehicle, the upper cover of the battery pack will be subjected to the pressure from human stepping and the pressure from structures such as seats. The pressure is transmitted to the pole column of the battery through the upper cover. However, since the pressure threshold that the pole column can withstand is too small, when the pressure applied to the pole column is greater than the threshold, the risk of failure of the battery cell is likely to occur. Summary of the Utility Model

[0003] To solve at least one of the problems existing in the above-mentioned prior art, according to one aspect of the present utility model, there is provided a battery pack, including:

[0004] An installation box, including a lower box body and an upper cover;

[0005] A battery pack, disposed in the lower box body, including a plurality of battery cells, each battery cell including a main body and a pole column disposed on the top of the main body;

[0006] A support structure, disposed in the installation box and on the top of the main body, for receiving the pressure received by the upper cover and transmitted thereto, and transmitting the pressure to the main body.

[0007] In some embodiments, the support structure includes a stress-receiving portion and a plurality of support portions disposed at the bottom of the stress-receiving portion. The stress-receiving portion is used for receiving the pressure applied by the upper cover, and the support portions are in abutment with the main body.

[0008] In some embodiments, the battery cells are cylindrical battery cells, and the main bodies of every three adjacent battery cells support one support portion.

[0009] In some embodiments, the support portion and the pole column are in clearance fit.

[0010] In some embodiments, the support portion is cylindrical.

[0011] In some embodiments, the height of the support portion is greater than or equal to the height of the pole column.

[0012] In some embodiments, the height of the support portion is greater than the height of the pole column, and the range of the height difference between the support portion and the pole column is 0.3 mm - 0.5 mm.

[0013] In some embodiments, the stress-receiving portion and the support portion are integrally provided.

[0014] In some embodiments, a wire groove is provided at one end of the supporting portion facing the main body.

[0015] In some embodiments, the wire groove is cross-shaped.

[0016] In some embodiments, the support structure is a composite material of polypropylene and glass fiber, or is acrylic.

[0017] In summary, the battery pack provided by the present utility model has the following technical effects:

[0018] By arranging the support structure to support between the main body of the battery cell and the upper cover, when the upper cover receives pressure, the pressure is transmitted to the support structure, and then the support structure transmits it to the main body of the battery cell, reducing or avoiding the situation that the pressure is transmitted to the pole column and causing damage or failure of the battery cell. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the battery pack according to an embodiment of the present utility model;

[0020] Figure 2 is Figure 1 an exploded schematic diagram of the battery pack in

[0021] Figure 3 is Figure 2 a schematic structural diagram of the support structure in

[0022] Figure 4 is Figure 2 a schematic structural diagram of the battery pack and the supporting portion in

[0023] Drawings: 100 - battery pack, 10 - installation box, 11 - lower box body, 111 - upper opening, 12 - upper cover, 20 - battery pack, 21 - battery cell, 211 - main body, 212 - pole column, 22 - battery cell row, 30 - support structure, 31 - force-receiving portion, 32 - supporting portion, 321 - wire groove. Detailed Embodiments

[0024] For better understanding and implementation, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the drawings in the embodiments of the present utility model.

[0025] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0026] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model.

[0027] The present utility model will be further described in detail below with reference to the drawings.

[0028] Please refer to Figures 1 to 4 , which is the battery pack 100 provided by the embodiment of the present utility model, including an installation box 10, a battery pack 20, and a support structure 30.

[0029] Among them, please refer to Figure 1 and Figure 2 , the installation box 10 includes a lower box body 11 and an upper cover 12; the battery pack 20 is arranged in the lower box body 11 and includes a plurality of battery cells 21, and each battery cell 21 includes a main body 211 and a pole column 212 arranged on the top of the main body 211; the support structure 30 is arranged in the installation box 10 and on the top of the main body 211, and is used to receive the pressure received from the upper cover 12 and transmitted, and transmit it to the main body 211.

[0030] For the above battery pack 100, by arranging the support structure 30 to support between the main body 211 of the battery cell 21 and the upper cover 12, when the upper cover 12 receives pressure, the pressure is transmitted to the support structure 30, and the support structure 30 then transmits it to the main body 211 of the battery cell 21, reducing or avoiding the situation that the pressure is transmitted to the pole column 212 and causing damage or failure of the battery cell 21.

[0031] Among them, in this embodiment, the cylindrical battery cell 21 is taken as an example for description. The main body 211 of the cylindrical battery cell 21 is cylindrical, and the top of the main body 211 is a shoulder, and the support structure 30 is supported by the shoulder of the main body 211. When the battery pack 20 is placed in the installation box 10, the lower box body 11 has an upper opening 111, and the upper cover 12 covers the upper opening 111 of the lower box body 11 to seal the lower box body 11.

[0032] Please refer to Figure 3 and Figure 4, the support structure 30 of this embodiment includes a force-receiving part 31 and a plurality of support parts 32 provided at the bottom of the force-receiving part 31. The force-receiving part 31 is used to receive the pressure applied by the upper cover 12. The support parts 32 are abutted against the main body 211. In this way, the external pressure is received by the force-receiving part 31 and transmitted to the plurality of support parts 32, so that the pressure is dispersed by the plurality of support parts 32, and finally the external force is received by the main body 211 of the battery cell 21.

[0033] Among them, since the battery cell 21 in this embodiment is a cylindrical battery cell, when the cylindrical battery cells are grouped, it includes a plurality of battery cell columns 22. The battery cells 21 in the plurality of battery cell columns 22 form a battery pack 20 in an interlaced manner. Therefore, when the support structure 30 is arranged on the top of the battery pack 20, every three adjacent main bodies 211 support one support part 32, that is, a support position 23 is formed by enclosing between every three adjacent pole columns 212. The support part 32 is arranged in the support position 23 and is supported by three adjacent main bodies 211. In this way, the pressure of each main body 211 of each battery cell 21 can be dispersed.

[0034] Furthermore, the support part 32 is cylindrical. Compared with the way of using a polygonal support part 32, the cylindrical support part 32 has no sharp corners, avoiding the risk of scratching between the sharp corners and the pole column 212 of the battery cell 21.

[0035] Among them, the support part 32 and the pole column 212 are in clearance fit, so as to avoid scratching the pole column 212 when the support part 32 is placed in the support position 23.

[0036] It can be understood that the height of the support part 32 can be greater than or equal to the height of the pole column 212. When the height of the support part 32 is equal to the height of the pole column 212, the pressure from the force-receiving part 31 is not only transmitted to the main body 211 by the support part 32, but also partially transmitted to the pole column 212; when the height of the support part 32 is greater than the height of the pole column 212, the pressure from the force-receiving part 31 is only transmitted to the main body 211 by the support part 32.

[0037] Furthermore, please refer to Figure 4 , in order to further protect the battery cell 21, the height of the support part 32 is greater than the height of the pole column 212, and the range of the height difference between the support part 32 and the pole column 212 is 0.3 mm - 0.5 mm. In this way, by setting the support part 32 with a higher height, the pressure received by the force-receiving part 31 is all transmitted to the main body 211 through the support part 32, better achieving the effect of protecting the pole column 212; at the same time, by setting the height difference between the support part 32 and the pole column 212 to 0.3 mm - 0.5 mm, it is avoided that setting a support part 32 with too high a height increases the height of the entire battery pack 100.

[0038] Among them, the height difference between the support part 32 and the pole column 212 can be set to values such as 0.3 mm, 0.4 mm, 0.5 mm, etc. according to needs, and it is not limited here.

[0039] Please refer to Figure 3 , in an embodiment of the present utility model, since electrical connection between the positive and negative poles is required between adjacent battery cells 21 in the battery cell row 22, a wire groove 321 is provided at one end of the support part 32 facing the main body 211. In this way, by providing the wire groove 321, a wire harness can be threaded through it, thereby facilitating the mutual electrical connection between the battery cells 21 in the battery cell row 22.

[0040] Specifically, the wire groove 321 in this embodiment is cross-shaped, so as to facilitate the wire harness to pass through according to different wire routing. At the same time, the groove wall of the wire groove 321 can clamp the wire harness to achieve the effect of fixing the position of the wire harness.

[0041] Furthermore, the force-bearing part 31 and the support part 32 in this embodiment are integrally provided, which is convenient for the molding of the entire support structure 30 and has a higher molding efficiency.

[0042] Furthermore, the support structure 30 in this embodiment can be a composite material of polypropylene and glass fiber, or it can be acrylic, so that while ensuring that the support structure 30 is an insulating material, it can also ensure the structural strength.

[0043] For the above battery pack 100, by providing the support structure 30 in the installation box 10, the force applied to the upper cover 12 can be transmitted to the main body 211 of the battery cell 21 through the support structure 30; in the manner that the support structure 30 includes the force-bearing part 31 and multiple support parts 32, the pressure can be dispersed through the multiple support parts 32; by providing the wire groove 321 in the support part 32, it is convenient for the electrical connection between adjacent battery cells 21.

[0044] The technical means disclosed in the solution of the present utility model are not limited to the technical means disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present utility model, several improvements and refinements can be made, and these improvements and refinements are also regarded as the protection scope of the present utility model.

Claims

1. A battery pack (100), characterized in that: include: An installation box (10) comprises a lower box body (11) and an upper cover (12); A battery pack (20) is arranged in the lower box (11), comprising a plurality of battery cells (21), each of the battery cells (21) comprising a main body (211) and a pole (212) arranged on the top of the main body (211); The support structure (30) is arranged in the installation box (10) and on the top of the main body (211), and is used to receive the pressure received and transmitted from the upper cover (12) and transmit it to the main body (211).

2. The battery pack (100) according to claim 1, characterized in that: The support structure (30) comprises a force-bearing portion (31) and a plurality of support portions (32) arranged at the bottom of the force-bearing portion (31); the force-bearing portion (31) is used to receive pressure applied by the upper cover (12); and the support portions (32) and the main body (211) are in contact with each other.

3. The battery pack (100) according to claim 2, characterized in that: The battery core (21) is a cylindrical battery core, and the main bodies (211) of every three adjacent battery cores (21) support one support portion (32).

4. The battery pack (100) according to claim 3, characterized in that: The support portion (32) and the pole (212) are clearance-matched.

5. The battery pack (100) according to any one of claims 2 to 4, characterized in that: The supporting portion (32) is cylindrical.

6. The battery pack (100) according to any one of claims 2 to 4, characterized in that: The height of the support portion (32) is greater than or equal to the height of the pole (212).

7. The battery pack (100) according to claim 6, characterized in that: The height of the support portion (32) is greater than the height of the pole (212), and the height difference between the support portion (32) and the pole (212) is in the range of 0.3 mm to 0.5 mm.

8. The battery pack (100) according to any one of claims 2 to 4, characterized in that: The force-bearing portion (31) and the supporting portion (32) are integrally arranged.

9. The battery pack (100) according to any one of claims 2 to 4, characterized in that: One end of the support portion (32) facing the main body (211) is provided with a wire passing groove (321).

10. The battery pack (100) according to claim 9, characterized in that: The wire passing groove (321) is in a cross shape.

11. The battery pack (100) according to any one of claims 1 to 4, characterized in that: The support structure (30) is a composite material of polypropylene and glass fiber, or acrylic.

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