Battery box body and battery pack comprising same

Abstract

The utility model discloses a battery box body and a battery pack comprising the same. The battery box body comprises a bottom plate, an outer reinforcing beam, an inner reinforcing beam and two side plates, the two side plates are respectively positioned on two sides of the bottom plate, and the bottom plate and the two side plates define a cavity for accommodating a battery cell; each side plate is provided with an outer side wall and an inner side wall which are opposite, the outer side wall is relatively far away from the cavity, and the inner side wall is relatively close to the cavity; the outer reinforcing beam is integrally formed on the outer side wall; the inner reinforcing beam is integrally formed between the inner side wall and the bottom plate; therefore, the bottom plate, the side plate, the outer reinforcing beam and the inner reinforcing beam are integrally formed together, specifically, the outer reinforcing beam and the inner reinforcing beam are integrally formed on the two sides of the side plate respectively, so that the overall structural strength of the battery box body is guaranteed and improved, and the battery box body also has the advantages of simpler structure, good sealing performance and low production cost.

Description

Technical Field

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

[0002] A battery pack usually includes a battery case. In order to enhance the structural strength, existing battery cases are prone to high production costs, especially for battery packs used in hybrid vehicles with a small number of cells. If the battery case of the battery pack used in hybrid vehicles is made based entirely on the battery pack used in pure electric vehicles, cost waste is more likely to occur. Utility Model Content

[0003] In order to overcome at least one of the defects of the prior art described above, the utility model provides a battery case and a battery pack including the battery case, aiming to enhance the structural strength of the battery case while reducing the production cost of the battery case.

[0004] The technical solution adopted by the utility model to solve the problem is:

[0005] The battery box comprises: a bottom plate; two side plates, respectively located on opposite sides of the bottom plate, the bottom plate and the two side plates enclose a cavity for accommodating battery cells; each of the side plates has a relative outer wall and an inner wall, the outer wall is relatively far away from the cavity, and the inner wall is relatively close to the cavity; an external reinforcement beam, integrally formed on the outer wall; an internal reinforcement beam, integrally formed between the inner wall and the bottom plate.

[0006] According to some embodiments of the present invention, a plurality of battery cell installation positions for installing battery cells are arranged on the bottom plate, and a plurality of pressure relief chambers are arranged in the bottom plate, and the plurality of pressure relief chambers are arranged in one-to-one correspondence with the plurality of battery cell installation positions.

[0007] According to some embodiments of the utility model, a first hollow portion is formed in the side plate, a first reinforcing rib is arranged in the first hollow portion, and the first hollow portion and the first reinforcing rib both extend along the length direction of the side plate.

[0008] According to some embodiments of the present invention, the inner reinforcement beam extends along the length direction of the side plate.

[0009] According to some embodiments of the utility model, two inner reinforcing beams are provided, and the two inner reinforcing beams are respectively integrally formed on the two inner side walls, and each inner reinforcing beam has a guiding inclined wall, and the two guiding inclined walls are arranged opposite to each other and distributed in an eight-shaped shape, and the opening formed between the two guiding inclined walls gradually shrinks from the outside to the inside.

[0010] According to some embodiments of the present invention, each of the inner reinforcement beams has a connecting wall, the connecting wall is connected between the guiding inclined wall and the bottom plate, and the connecting wall is perpendicular or substantially perpendicular to the bottom plate.

[0011] According to some embodiments of the utility model, a second hollow portion is formed between the guiding inclined wall, the connecting wall and the side panel, a second reinforcing rib is arranged in the second hollow portion, and the second hollow portion and the second reinforcing rib both extend along the length direction of the side panel.

[0012] According to some embodiments of the present invention, the outer reinforcement beam extends along the length direction of the side plate.

[0013] According to some embodiments of the utility model, a third hollow portion is provided in the external reinforcement beam, a third reinforcing rib is provided in the third hollow portion, and the third reinforcing rib and the third hollow portion both extend along the length direction of the side plate.

[0014] In addition, the battery pack includes a battery cell and a battery case as described above, wherein the battery cell is disposed in the cavity.

[0015] In summary, the battery box and the battery pack including the battery box provided by the utility model have at least the following technical effects:

[0016] The bottom plate, side plates, outer reinforcement beams and inner reinforcement beams are integrally formed together. Specifically, the outer reinforcement beams and inner reinforcement beams are respectively integrally formed on both sides of the side plates. In this way, the overall structural strength of the battery box is guaranteed and improved, and it also has the advantages of relatively simple structure, good sealing performance and low production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of the structure of a battery pack according to an embodiment of the utility model;

[0018] Figure 2 This is a schematic diagram of the exploded structure of a battery box according to an embodiment of the utility model;

[0019] Figure 3 It is a front view structural schematic diagram of a battery box (end plate not shown) according to an embodiment of the utility model.

[0020] The meanings of the reference numerals are as follows:

[0021] 1. Bottom plate; 11. Battery cell installation position; 12. Pressure relief chamber; 2. Side plate; 21. First hollow portion; 22. First reinforcing rib; 23. Outer wall; 24. Inner wall; 3. Cavity; 4. Outer reinforcing beam; 41. Third hollow portion; 42. Third reinforcing rib; 43. Fourth reinforcing rib; 5. Inner reinforcing beam; 51. Second hollow portion; 52. Second reinforcing rib; 53. Guide inclined wall; 54. Connecting wall; 6. End plate; 7. Battery cell. DETAILED DESCRIPTION

[0022] For better understanding and implementation, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0023] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc. indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention.

[0025] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0026] See also Figures 1 to 3 The present embodiment discloses a battery box, comprising a bottom plate 1, an outer reinforcing beam 4, an inner reinforcing beam 5 and two side plates 2: the two side plates 2 are respectively located on opposite sides of the bottom plate 1, and the bottom plate 1 and the two side plates 2 form a cavity 3 for accommodating a battery cell 7; each side plate 2 has an outer side wall 23 and an inner side wall 24 relative to each other, the outer side wall 23 is relatively far away from the cavity 3, and the inner side wall 24 is relatively close to the cavity 3; the outer reinforcing beam 4 is integrally formed on the outer side wall 23; the inner reinforcing beam 5 is integrally formed between the inner side wall 24 and the bottom plate 1.

[0027] In a battery box provided in this embodiment, a bottom plate 1, a side plate 2, an outer reinforcing beam 4 and an inner reinforcing beam 5 are integrally formed together. Specifically, the outer reinforcing beam 4 and the inner reinforcing beam 5 are respectively integrally formed on both sides of the side plate 2. In this way, the overall structural strength of the battery box is ensured and improved, and it also has the advantages of a relatively simple structure, good sealing performance and low production cost.

[0028] like Figure 1 and Figure 2 As shown, further, in the present embodiment, a plurality of battery cell mounting positions 11 for mounting battery cells 7 are arranged on the base plate 1, and a plurality of pressure relief chambers 12 are arranged in the base plate 1, each of which extends along the length direction of the base plate 1, and a battery cell mounting position is correspondingly arranged on a pressure relief chamber 12. More specifically, in the present embodiment, a plurality of battery cell mounting positions 11 are divided into a plurality of rows and each row includes a plurality of battery cell mounting positions 11, and each row of battery cell mounting positions 11 is arranged in a corresponding one of the pressure relief chambers 12. When thermal runaway of the battery cell 7 occurs, pressure relief can be achieved through the pressure relief chamber 12. In this way, the production cost can be reduced as much as possible while meeting the safety requirements of the product.

[0029] Preferably, in this embodiment, the bottom plate 1, the side plate 2, the outer reinforcement beam 4 and the inner reinforcement beam 5 are integrally formed of an aluminum extruded profile, so that the battery box has the advantages of being durable, light and strong and having a simple production process.

[0030] It should be noted that, in some other embodiments, the bottom plate 1, the side plate 2, the outer reinforcement beam 4 and the inner reinforcement beam 5 may also be integrally injection molded, which can be selected according to actual needs and is not limited here.

[0031] like Figure 2 and Figure 3 As shown, preferably, in the present embodiment, in order to reduce production materials and thereby reduce production costs, a first hollow portion 21 extending along the length direction of the side panel 2 is formed in the side panel 2, and in order to avoid the problem that the side panel 2 is more easily deformed due to the provision of the first hollow portion 21, a first reinforcing rib 22 extending along the length direction of the side panel 2 is provided in the first hollow portion 21.

[0032] like Figure 2 and Figure 3 As shown, preferably, in this embodiment, the inner reinforcing beam 5 extends along the length direction of the side panel 2, so that, on the one hand, the connection strength between the inner reinforcing beam 5 and the side panel 2 is increased, and on the other hand, the overall structural strength of the battery box is also strengthened.

[0033] like Figure 2 and Figure 3As shown, specifically, in the present embodiment, two inner reinforcing beams 5 are provided, and the two inner reinforcing beams 5 are respectively integrally formed on the two inner side walls 24. Preferably, each inner reinforcing beam 5 has a guiding oblique wall 53, and the two guiding oblique walls 53 are arranged opposite to each other and are distributed in an eight-shaped shape. The opening formed between the two guiding oblique walls 53 gradually shrinks from the outside to the inside. More specifically, in the present embodiment, the outer side of the opening refers to the side of the opening away from the bottom plate 1, and the inner side of the opening refers to the side of the opening close to the bottom plate 1. In this way, on the one hand, the two guiding oblique walls 53 can be used to guide the installation of the battery cell 7 and other components, and on the other hand, the two guiding oblique walls 53 can also avoid the problem of interference between the inner reinforcing beam 5 and the battery cell 7.

[0034] like Figure 2 and Figure 3 As shown, specifically, in this embodiment, each inner reinforcing beam 5 has a connecting wall 54, and the connecting wall 54 is connected between the guiding inclined wall 53 and the bottom plate 1, and the connecting wall 54 is perpendicular to the bottom plate 1. In this way, the guiding inclined wall 53 and the bottom plate 1 are connected by the connecting wall 54. On the one hand, the connection stability between the guiding inclined surface and the bottom plate 1 can be improved, and on the other hand, the cavity 3 can have a sufficiently large space.

[0035] It should be noted that, in some other embodiments, the connecting wall 54 and the bottom plate 1 may also be substantially perpendicular, that is, the angle between the connecting wall 54 and the bottom plate 1 may be between 80 degrees and 110 degrees.

[0036] like Figure 2 and Figure 3 As shown, preferably, in the present embodiment, in order to reduce production materials and thus reduce production costs, a second hollow portion 51 extending along the length direction of the side panel 2 is formed between the guiding inclined wall 53, the connecting wall 54 and the side panel 2, and in order to prevent the guiding inclined wall 53 and the connecting wall 54 from being easily deformed due to the presence of the second hollow portion 51, a second reinforcing rib 52 extending along the length direction of the side panel 2 is provided in the second hollow portion 51.

[0037] like Figure 2 and Figure 3 As shown, preferably, in this embodiment, the outer reinforcing beam 4 extends along the length direction of the side plate 2, so that, on the one hand, the connection strength between the outer reinforcing beam 4 and the side plate 2 is increased, and on the other hand, the overall structural strength of the battery box is also strengthened.

[0038] like Figure 2 and Figure 3As shown, preferably, in this embodiment, in order to reduce production materials and thus reduce production costs, a third hollow portion 41 extending along the length direction of the side panel 2 is provided in the outer reinforcing beam 4, and in order to avoid the problem that the outer reinforcing beam 4 is more susceptible to deformation due to the provision of the third hollow portion 41, a cross-connected third reinforcing rib 42 and a fourth reinforcing rib 43 are provided in the third hollow portion 41, and both the third reinforcing rib 42 and the fourth reinforcing rib 43 extend along the length direction of the side panel 2.

[0039] like Figure 1 and Figure 2 As shown, specifically, in this embodiment, the battery box also includes two end plates 6, which are arranged opposite to each other and connected between the two side plates 2. The cavity 3 is formed by the bottom plate 1, the two end plates 6 and the two side plates 2.

[0040] In addition, a battery pack is also provided in this embodiment, including multiple battery cells 7 and the battery case as described above. The multiple battery cells 7 are connected one by one to multiple battery cell installation positions 11. The battery pack has all the advantages of the above-mentioned battery case and will not be repeated here.

[0041] Specifically, in this embodiment, the battery cell 7 is a cylindrical battery cell 7. More specifically, the battery pack can be applied to hybrid vehicles.

[0042] In summary, the battery box and the battery pack including the battery box disclosed in the utility model can at least bring the following beneficial technical effects:

[0043] 1) The bottom plate 1, the side plate 2, the outer reinforcement beam 4 and the inner reinforcement beam 5 are integrally formed together, and the outer reinforcement beam 4 and the inner reinforcement beam 5 are integrally formed on both sides of the side plate 2, respectively, so that the overall structural strength of the battery box is guaranteed and improved, and it also has the advantages of relatively simple structure, good sealing performance and low production cost;

[0044] 2) A plurality of battery cell installation positions 11 for installing the battery cells 7 are provided on the bottom plate 1, and a plurality of pressure relief chambers 12 are provided in the bottom plate 1. The plurality of pressure relief chambers 12 are arranged in a one-to-one correspondence with the plurality of battery cell installation positions 11, which can reduce the production cost as much as possible while meeting the safety requirements of the product;

[0045] 3) The two guiding oblique walls 53 are arranged opposite to each other and are distributed in an eight-shaped pattern. The opening formed between the two guiding oblique walls 53 gradually decreases from the outside to the inside. The two guiding oblique walls 53 can also avoid the problem of interference between the inner reinforcing beam 5 and the battery cell 7;

[0046] 4) A first hollow portion 21 is provided in the side plate 2, a second hollow portion 51 is provided in the inner reinforcing beam 5, and a third hollow portion 41 is provided in the outer reinforcing beam 4, so as to reduce production materials and thus production costs.

[0047] The technical means disclosed in the solution of the utility model are not limited to the technical means disclosed in the above-mentioned implementation mode, but also include technical solutions composed of any combination of the above technical features. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the utility model, and these improvements and modifications are also regarded as the protection scope of the utility model.

Claims

1. A battery box, characterized in that: include: Bottom plate (1); The two side plates (2) are respectively located on opposite sides of the bottom plate (1), and the bottom plate (1) and the two side plates (2) enclose a cavity (3) for accommodating the battery cell (7); each of the side plates (2) has an outer side wall (23) and an inner side wall (24) opposite to each other, the outer side wall (23) being relatively far away from the cavity (3), and the inner side wall (24) being relatively close to the cavity (3); An external reinforcement beam (4) integrally formed on the outer side wall (23); An inner reinforcing beam (5) is integrally formed between the inner side wall (24) and the bottom plate (1).

2. The battery box according to claim 1, characterized in that: The bottom plate (1) is provided with a plurality of battery cell installation positions (11) for installing battery cells (7), and the bottom plate (1) is provided with a plurality of pressure relief chambers (12), wherein one of the battery cell installation positions (11) is arranged in one of the pressure relief chambers (12).

3. The battery box according to claim 1, characterized in that: A first hollow portion (21) is formed in the side plate (2), a first reinforcing rib (22) is arranged in the first hollow portion (21), and the first hollow portion (21) and the first reinforcing rib (22) both extend along the length direction of the side plate (2).

4. The battery box according to any one of claims 1 to 3, characterized in that: The inner reinforcement beam (5) extends along the length direction of the side plate (2).

5. The battery box according to claim 4, characterized in that: Two inner reinforcing beams (5) are provided, and the two inner reinforcing beams (5) are respectively integrally formed on the two inner side walls (24). Each inner reinforcing beam (5) has a guiding inclined wall (53). The two guiding inclined walls (53) are arranged opposite to each other and are distributed in an eight-shaped shape. The opening formed between the two guiding inclined walls (53) gradually decreases from the outside to the inside.

6. The battery case according to claim 5, characterized in that: Each of the inner reinforcement beams (5) has a connecting wall (54), the connecting wall (54) is connected between the guiding inclined wall (53) and the bottom plate (1), and the connecting wall (54) is perpendicular or substantially perpendicular to the bottom plate (1).

7. The battery case according to claim 6, characterized in that: A second hollow portion (51) is formed between the guide inclined wall (53), the connecting wall (54) and the side plate (2), a second reinforcing rib (52) is arranged in the second hollow portion (51), and the second hollow portion (51) and the second reinforcing rib (52) both extend along the length direction of the side plate (2).

8. The battery case according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that: The outer reinforcement beam (4) extends along the length direction of the side plate (2).

9. The battery case according to claim 8, characterized in that: A third hollow portion (41) is provided in the outer reinforcing beam (4), a third reinforcing rib (42) is provided in the third hollow portion (41), and both the third reinforcing rib (42) and the third hollow portion (41) extend along the length direction of the side plate (2).

10. A battery pack, characterized in that: It comprises a battery cell (7) and a battery box as claimed in any one of claims 1 to 9, wherein the battery cell (7) is arranged in the cavity (3).

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