Battery pack outer shell

Abstract

The utility model discloses a battery pack outer shell which comprises two first end plates which are respectively arranged at opposite ends, and connecting terminals used for electric connection are arranged on the first end plates; the two second end plates are located at the opposite ends respectively, the two ends of each second end plate are connected with the first end plates respectively, a reinforcing unit is arranged on the outer side of each second end plate, each reinforcing unit comprises a top plate and a bottom plate which are fixedly connected with the corresponding second end plate, a supporting piece is arranged between each top plate and the corresponding bottom plate, and each supporting piece is connected with the corresponding first end plate. The upper end of the supporting piece is connected with the top plate, and the lower end of the supporting piece is connected with the bottom plate. According to the battery pack shell, the reinforcing units are arranged on the outer sides of the two second end plates and comprise the top plates and the side plates, and the supporting pieces are arranged between the top plates and the side plates, so that the rigidity and the strength of the battery pack shell are improved, and the stamping resistance, the extrusion resistance and the collision resistance of the battery pack shell are enhanced.

Description

Technical Field

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

[0002] The battery pack is a key component for storing electrical energy in new energy vehicles. Its design and manufacturing technology directly affect the performance, safety and cost of electric vehicles.

[0003] However, the outer shell of existing prismatic battery packs includes four end plates, two of which are equipped with connection terminals for external devices, while the other two end plates are flat plates. In other words, the outer shell of existing battery packs is made by connecting and fixing multiple flat plates, resulting in weak rigidity and strength. When the battery pack is subjected to impact, compression, and collision, the battery pack cannot provide effective protection, resulting in deformation and damage. Summary of the Invention

[0004] In view of the above-mentioned deficiencies in the prior art, the technical problem to be solved by the present invention is to propose a battery pack outer shell to solve the problems of low rigidity and strength of the battery pack outer shell in the prior art.

[0005] The technical solution adopted by the utility model to solve the technical problem is a battery pack shell, comprising:

[0006] Two first end plates at opposite ends, each of the first end plates being provided with connection terminals for electrical connection;

[0007] Two second end plates are respectively located at opposite ends, and both ends of each second end plate are respectively connected to one first end plate, and a reinforcement unit is provided on the outer side of each second end plate, and the reinforcement unit includes a top plate and a bottom plate fixed to the second end plate, and a support member is provided between the top plate and the bottom plate, and the upper end of the support member is connected to the top plate, and the lower end of the support member is connected to the bottom plate.

[0008] Furthermore, the support member is a sandwich core arranged in a honeycomb shape.

[0009] Furthermore, the sandwich core structure has a plurality of core holes, and bolt holes for bolt connection are formed in at least some of the core holes.

[0010] Furthermore, the core hole is a through hole with a hexagonal cross section, and the bolt hole is a through hole with a circular cross section.

[0011] Furthermore, the plurality of bolt holes are evenly arranged along the length direction of the sandwich core structure.

[0012] Furthermore, it further includes a side panel, both ends of which are connected to the top panel and the bottom panel respectively, and one side of the sandwich core is connected to the second end panel, and the other side is connected to the side panel.

[0013] Furthermore, a reinforcing plate is provided, one end of which is connected to the second end plate, and the other end of which is connected to the bottom plate.

[0014] Furthermore, one end of the reinforcing plate is fixedly connected to the lower end of the second end plate, and the other end is fixedly connected to the middle portion of the bottom plate.

[0015] Furthermore, the support member is a foam filling layer or a fiber filling layer.

[0016] Furthermore, the distance between the two first end plates is greater than the distance between the two second end plates.

[0017] Compared with the prior art, the present invention has at least the following beneficial effects:

[0018] A reinforcement unit is provided on the outer side of the two second end plates. The reinforcement unit includes a top plate and a side plate. A support member is provided between the top plate and the side plates to improve the rigidity and strength of the battery pack shell and enhance its resistance to stamping, extrusion and collision. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 Schematic diagram of the structure of the battery pack shell in the embodiment;

[0020] Figure 2 Schematic diagram of the structure of the second end plate and the reinforcement unit in the embodiment;

[0021] Figure 3 Schematic diagram of the structure of the sandwich core in the embodiment;

[0022] In the picture:

[0023] 100, first end plate;

[0024] 200, second end plate;

[0025] 300, reinforcement unit; 310, sandwich core; 311, core hole; 312, bolt hole; 320, top plate; 330, bottom plate; 340, side plate;

[0026] 400. Reinforcement plate. DETAILED DESCRIPTION

[0027] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0028] Please refer to Figure 1-Figure 3The utility model discloses a battery pack housing, comprising:

[0029] Two first end plates 100 at opposite ends, each of the first end plates 100 being provided with connection terminals for electrical connection;

[0030] Two second end plates 200 are respectively located at opposite ends, and both ends of each second end plate 200 are respectively connected to one first end plate 100, and a reinforcement unit 300 is provided on the outer side of each second end plate 200, and the reinforcement unit 300 includes a top plate 320 and a bottom plate 330 fixed to the second end plate 200, and a support member is provided between the top plate 320 and the bottom plate 330, and the upper end of the support member is connected to the top plate 320, and the lower end of the support member is connected to the bottom plate 330.

[0031] Specifically, by arranging a reinforcement unit 300 on the outer side of the two second end plates 200, the reinforcement unit 300 includes a top plate 320 and a side plate, and a support member is arranged between the top plate 320 and the side plate to improve the rigidity and strength of the battery pack shell and enhance its anti-punching, anti-extrusion and anti-collision capabilities.

[0032] It should be noted that since the two first end plates 100 are provided with connecting terminals, space needs to be reserved on the outside of the first end plates 100 for installing devices such as the battery management module. Therefore, in this case, the reinforcement unit 300 is arranged on the outside of the second end plate 200 to improve the rigidity and strength of the entire battery pack shell without encroaching on the installation space of other devices.

[0033] At the same time, the distance between the two first end plates 100 is greater than the distance between the two second end plates 200. That is, the two first end plates 100 are arranged along the length of the battery pack, and the two second end plates 200 are arranged along the width of the battery pack. Disposing the reinforcement unit 300 on the second end plates 200 and along the length of the battery pack extends the length over which the reinforcement unit 300 can be deployed and increases the area covered by the reinforcement unit 300, thereby maximizing the strength and rigidity of the battery pack.

[0034] Furthermore, the support member is a sandwich core 310 arranged in a honeycomb shape.

[0035] Specifically, setting the support member as a honeycomb sandwich core 310 can effectively reduce its weight and at the same time increase the upper limit of the lateral force and the upper limit of the longitudinal force of the outer shell.

[0036] Furthermore, the sandwich core 310 structure has a plurality of core holes 311 , and bolt holes 312 for bolt connection are formed in at least some of the core holes 311 .

[0037] Furthermore, the core hole 311 is a through hole with a hexagonal cross section, and the bolt hole 312 is a through hole with a circular cross section.

[0038] Specifically, a portion of the core hole 311 is partially filled with material, transforming the hexagonal core hole 311 into a circular hole to form a bolt hole 312 for connecting to the external structure, facilitating battery pack installation. It should be noted that the above description does not limit the processing process for the core hole 311 and the bolt hole 312. It is merely intended to illustrate the structural differences between the core hole 311 and the bolt hole 312 and the positioning of the bolt hole 312. The bolt hole 312 can also be directly formed during the processing of the sandwich core 310.

[0039] At the same time, the bolt hole 312 is integrated into the core hole 311, which not only avoids opening holes in other positions and effectively reduces costs, but also allows the outer shell to be directly transferred to the sandwich core 310 through the bolt hole 312 when the outer shell is subjected to force, or from the sandwich core 310 to the bolt hole 312, thereby preventing other parts of the outer shell from being subjected to excessive force and damaging the battery pack.

[0040] Furthermore, the plurality of bolt holes 312 are evenly arranged along the length direction of the sandwich core 310 .

[0041] The bolt holes 312 are evenly arranged along the length direction, so that the stress at each position of the sandwich core 310 is more evenly distributed.

[0042] Furthermore, a side panel is included, both ends of which are connected to the top panel 320 and the bottom panel 330 respectively, and one side of the sandwich core 310 is connected to the second end panel 200 and the other side is connected to the side panel.

[0043] Specifically, a side panel is provided to connect with one side of the sandwich core 310 , and the side panel is connected to the top panel 320 and the top panel 320 , which can enhance the connection strength between the sandwich core 310 , the top panel 320 and the bottom panel 330 , and the side panel can also share the force of the sandwich core 310 .

[0044] Furthermore, the sandwich core 310 , the top plate 320 , the bottom plate 330 and the side plates 340 may be made of materials such as profiled aluminum.

[0045] Furthermore, a reinforcing plate 400 is provided, one end of the reinforcing plate 400 is connected to the second end plate 200 , and the other end of the reinforcing plate 400 is connected to the bottom plate 330 .

[0046] Specifically, the reinforcement plate 400 is provided to enhance the connection strength between the reinforcement unit 300 and the second end plate 200 and to share the force of the reinforcement unit 300 .

[0047] Furthermore, one end of the reinforcing plate 400 is fixedly connected to the lower end of the second end plate 200 , and the other end is fixedly connected to the middle portion of the bottom plate 330 .

[0048] Specifically, one end of the reinforcing plate 400 is fixedly connected to the lower end of the second end plate 200, so that the distance from the connection part between the second end plate 200 and the reinforcing plate 400 to the connection part with the sandwich core 310 is maximized, which can expand the area covered by the reinforcing plate 400 and increase its role in strengthening the structural strength.

[0049] Importantly, the reinforcing plate 400, the second end plate 200, and the bottom plate 330 form a right triangle, with the side containing the reinforcing plate 400 being the hypotenuse of the right triangle. When force is applied to other parts of the outer shell and transmitted to the reinforcing plate 400, the reinforcing plate 400 can decompose the force into longitudinal and transverse components. These two force components are then transmitted to the bottom plate 330, which then transmits them to the sandwich core 310 to dissipate the force. It is understandable that the sandwich core 310 has a higher upper limit on the force in both the transverse and longitudinal directions. Therefore, the tilted arrangement of the reinforcing plate 400 can make the direction of force applied to the sandwich core 310 more conducive to dissipating the force, thereby improving the structural strength of the entire battery pack outer shell.

[0050] Furthermore, the support member is a foam filling layer or a fiber filling layer.

[0051] Specifically, the support member can also be replaced by the sandwich core 310 with a filling of foam material or fiber composite material. These materials have good thermal insulation performance and lightweight characteristics, which can effectively improve the stability and reliability of the entire reinforcement unit 300.

[0052] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0053] In addition, terms such as "first," "second," and "an" in this utility model are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of this utility model, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0054] In this utility model, unless otherwise specified or limited, the terms "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can mean fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise specified. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0055] In addition, the technical solutions between the various embodiments of the present invention can be combined with each other, but it must be based on the fact that ordinary technicians in this field can implement it. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

Claims

1. A battery pack outer shell, characterized in that: include: Two first end plates at opposite ends, each of the first end plates being provided with connection terminals for electrical connection; Two second end plates are respectively located at opposite ends, and both ends of each second end plate are respectively connected to one first end plate, and a reinforcement unit is provided on the outer side of each second end plate, and the reinforcement unit includes a top plate and a bottom plate fixed to the second end plate, and a support member is provided between the top plate and the bottom plate, and the upper end of the support member is connected to the top plate, and the lower end of the support member is connected to the bottom plate.

2. The battery pack housing according to claim 1, wherein: The support member is a sandwich core arranged in a honeycomb shape.

3. The battery pack shell according to claim 2, characterized in that: The sandwich core structure has a plurality of core holes, and bolt holes for bolt connection are formed in at least some of the core holes.

4. The battery pack shell according to claim 3, characterized in that: The core hole is a through hole with a hexagonal cross section, and the bolt hole is a through hole with a circular cross section.

5. The battery pack outer shell according to claim 3, characterized in that: The plurality of bolt holes are evenly arranged along the length direction of the sandwich core structure.

6. The battery pack outer shell according to claim 2, characterized in that: It also includes a side plate, both ends of which are connected to the top plate and the bottom plate respectively, and one side of the sandwich core is connected to the second end plate, and the other side is connected to the side plate.

7. The battery pack outer shell according to claim 1, characterized in that: A reinforcing plate is also provided, one end of which is connected to the second end plate, and the other end of which is connected to the bottom plate.

8. The battery pack outer shell according to claim 7, characterized in that: One end of the reinforcing plate is fixedly connected to the lower end of the second end plate, and the other end is fixedly connected to the middle portion of the bottom plate.

9. The battery pack outer shell according to claim 1, characterized in that: The supporting member is a foam filling layer or a fiber filling layer.

10. The battery pack outer shell according to claim 1, characterized in that: The distance between the two first end plates is greater than the distance between the two second end plates.

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