Lightweight metal plate battery pack box body

Abstract

The utility model discloses a lightweight metal plate battery pack box body, which comprises a plurality of box body linings, middle structural beams and bottom bracket beams, the top of the box body linings is provided with a concave mounting groove, the middle structural beams are welded between two adjacent box body linings, and ring beams are welded on the outer sides of the box body linings; bottom bracket beams are further connected to the bottoms of the box body lining, the middle structural beams and the ring beams. According to the battery pack box, the middle structural beams are arranged between the adjacent box linings, the ring beams are arranged on the outer sides of the box linings for fixation, and the box linings, the ring beams and the middle structural beams are fastened at the bottoms through the bottom bracket beams, so that the safety and reliability of the overall structure of the battery pack box are improved; the space utilization efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery manufacturing, and in particular to a lightweight sheet metal battery pack box. Background Art

[0002] The battery box is the core component of the battery system, which is related to the key performance of the battery system, such as structural strength reliability, sealing, and heat preservation, and directly affects the energy density of the battery system.

[0003] Many battery box structures in the prior art have design redundancy or unreasonable design, which causes the following problems:

[0004] (1) The structural design is redundant and the overall box structure is bulky, resulting in excessive energy density of the battery system.

[0005] (2) Failure to conduct a mechanical analysis of the battery case as a whole, or failure to conduct a targeted design based on the stress state of the battery case, resulting in failure to strengthen areas that should be strengthened and failure to reduce weight in areas with less stress.

[0006] (3) The selection of materials for the battery box is not prioritized, and the appropriate material cannot be selected in a targeted manner based on the overall stress conditions. Utility Model Content

[0007] The technical problem to be solved by the utility model is: how to provide a battery system box with a reliable structure and light weight.

[0008] In order to solve the above technical problems, the utility model provides the following technical solutions:

[0009] A lightweight sheet metal battery pack box includes a box liner, an intermediate structural beam, and a bottom bracket beam. The box liner is provided with a plurality of inner liners, and the top is a concave mounting groove. An intermediate structural beam is welded between two adjacent box liners, and a ring beam is welded on the outside of the box liner. The bottoms of the box liner, the intermediate structural beam, and the ring beam are also connected to the bottom of the bottom bracket beam.

[0010] The present application improves the safety and reliability of the overall structure of the battery pack box by arranging an intermediate structural beam between adjacent box liners, fixing a ring beam on the outside of the box liners, and fastening the box liners, ring beams and intermediate structural beams at the bottom through a bottom support beam. The bottom support beam adopts an embedded design from the bottom to improve space utilization efficiency and achieve lightweight while ensuring structural reliability.

[0011] As a further solution of the utility model: the box lining is an overall frame-like structure, and a module mounting beam is welded inside, and a mounting groove is opened at the bottom.

[0012] As a further solution of the utility model: a plurality of protrusions are arranged on the module mounting beam, and a plurality of weight-reducing holes are opened on the module mounting beam.

[0013] As a further solution of the utility model: the box lining is integrally formed and the material is steel plate.

[0014] As a further solution of the utility model: the top of the intermediate structural beam is installed as a whole, and the two sides are welded to the box lining.

[0015] As a further solution of the utility model: the intermediate structural beam is an overall raised frame structure, wherein the middle portion is a raised support frame and the two sides are connecting frames.

[0016] As a further solution of the utility model: a plurality of weight-reducing holes are provided on the raised support frame.

[0017] As a further solution of the utility model: the ring beam is in an "L"-shaped structure as a whole, and the vertical end is welded to the side of the box liner, and the horizontal end is welded to the bottom, and the bottom of the ring beam is also provided with an installation groove 2 corresponding to the installation groove 1.

[0018] As a further solution of the utility model: the bottom bracket beam is embedded in a mounting groove opened at the bottom of the box inner lining, and the bottom bracket beam is welded to the box inner lining, the middle structural beam and the ring beam.

[0019] As a further solution of the utility model: the box lining, the middle structural beam, the ring beam, the module installation beam and the bottom bracket beam are all of an integrally formed design.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] First, the present application improves the safety and reliability of the overall structure of the battery pack box by arranging an intermediate structural beam between adjacent box liners, arranging a ring beam on the outside of the box liners for fixing, and fastening the box liners, ring beams and intermediate structural beams at the bottom through a bottom bracket beam, and the bottom bracket beam adopts an embedded design from the bottom to improve space utilization efficiency;

[0022] Secondly, the module mounting beam of the present application adopts a multi-stage bending structure design to ensure bending rigidity, and a weight-reducing hole is opened on the module mounting beam according to mechanical analysis, and the weight-reducing hole design is used to achieve lightweighting while ensuring structural reliability;

[0023] Finally, the middle raised part of the middle structural beam of the present application adopts a heightened design to ensure the bending section coefficient and improve the overall structural rigidity. Weight-reducing holes are opened on the middle structural beam based on mechanical analysis to achieve lightweighting while ensuring structural reliability. The inner lining of the box of the present application is one-piece formed by deep-drawn steel to reduce welding processes, ensure sealing, and use thin-walled steel plates to achieve maximum weight reduction. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a schematic diagram of the overall structure of a lightweight sheet metal battery pack box according to an embodiment of the utility model;

[0025] Figure 2 This is a bottom view of a lightweight sheet metal battery pack box according to an embodiment of the utility model;

[0026] Figure 3 This is a schematic diagram of the structure of the box liner of the embodiment of the utility model;

[0027] Figure 4 This is a schematic diagram of the structure of the middle structural beam in the embodiment of the utility model;

[0028] Figure 5 This is a schematic diagram of the structure of the ring beam of an embodiment of the utility model;

[0029] Figure 6 This is a schematic diagram of the structure of the module installation beam of the embodiment of the utility model;

[0030] Explanation of the reference numerals: 1. Box lining; 2. Intermediate structural beam; 3. Ring beam; 4. Module mounting beam; 5. Bottom bracket beam. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution in the embodiments of the utility model will be clearly and completely described below in combination with the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] Reference Figure 1 and Figure 2 A lightweight sheet metal battery pack box includes a box lining 1, an intermediate structure beam 2, a ring beam 3, a module mounting beam 4 and a bottom bracket beam 5, wherein the box lining 1, the intermediate structure beam 2, the ring beam 3, the module mounting beam 4 and the bottom bracket beam 5 are assembled and welded to form a battery pack box.

[0033] Reference Figure 1 and Figure 3The box liner 1 is provided with several pieces. The box liner 1 is in a frame-like structure. The box liner 1 is formed of deep-drawn steel in one piece, which reduces welding processes and ensures sealing. Thin-walled steel plates are selected to achieve maximum weight reduction. An inwardly concave installation groove is provided inside the box liner 1, and a module installation beam 4 is welded inside the installation groove. An installation groove 1 for embedding a bottom bracket beam 5 is provided at the bottom of the box liner 1.

[0034] Reference Figure 1 and Figure 4 The middle structural beam 2 is installed between adjacent box liners 1 and is fixed to the box liners 1 by welding. The top of the middle structural beam 2 is installed on the vehicle body and the two sides are welded to the box liners 1. The middle structural beam 2 is an overall raised frame structure, wherein the middle part is a raised support frame and the two sides are connecting frames. A number of weight-reducing holes are provided on the raised support frame.

[0035] It should be noted that the middle raised part of the middle structural beam 2 adopts a heightened design to ensure the bending section coefficient and improve the overall structural rigidity. Weight-reducing holes are opened on the middle structural beam 2 based on mechanical analysis to achieve lightweighting while ensuring structural reliability. The middle structural beam 2 is also an integrated stamping design.

[0036] Reference Figure 1 and Figure 5 The ring beam 3 is an integrally formed design and is arranged on the outside of the box liner 1 to surround the box liner 1. The ring beam 3 is an "L"-shaped structure as a whole, and the vertical end is welded to the side of the box liner 1, and the horizontal end is welded to the bottom. The bottom of the ring beam 3 is also provided with an installation groove 2 corresponding to the installation groove 1, and the installation groove 2 is also used to embed the bottom bracket beam 5.

[0037] It should be noted that the ring beam 3 is made of high-strength structural steel, and according to the modal analysis results, the height is fully reduced, and according to the dynamic analysis, weight-reducing holes are also designed on the ring beam 3, thereby ensuring structural reliability and achieving lightweight.

[0038] Reference Figure 1 and Figure 6 The module mounting beam 4 is designed as an integral part, and a plurality of protrusions are arranged on the module mounting beam 4, that is, a multi-section bending structure design is adopted in the module mounting beam 4 to ensure the bending rigidity, and a plurality of weight-reducing holes are also designed on the module mounting beam 4 according to the mechanical analysis, so as to achieve lightweight on the basis of ensuring the structural reliability.

[0039] Reference Figure 2 The bottom bracket beam 5 is embedded into the installation groove 1 inside the box liner 1 and the installation groove 2 inside the ring beam 3, and the box liner 1, the middle structure beam 2 and the ring beam 3 are connected, and welding is performed at the connection position.

[0040] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A lightweight sheet metal battery pack box, characterized in that: The invention comprises a box body lining (1), an intermediate structural beam (2), and a bottom bracket beam (5); the box body lining (1) is provided with a plurality of inner concave mounting grooves at the top; an intermediate structural beam (2) is welded between two adjacent box body liners (1); a ring beam (3) is welded on the outside of the box body lining (1); and the bottoms of the box body lining (1), the intermediate structural beam (2) and the ring beam (3) are also connected to the bottom of the bottom bracket beam (5).

2. A lightweight sheet metal battery pack box according to claim 1, characterized in that: The box liner (1) is in the form of a frame structure as a whole, and a module mounting beam (4) is welded inside, and a mounting groove (1) is provided at the bottom.

3. A lightweight sheet metal battery pack box according to claim 2, characterized in that: The module mounting beam (4) is provided with a plurality of protrusions, and the module mounting beam (4) is provided with a plurality of weight-reducing holes.

4. The lightweight sheet metal battery pack box according to claim 1, characterized in that: The box lining (1) is integrally formed and is made of steel plate.

5. The lightweight sheet metal battery pack box according to claim 1, characterized in that: The top of the intermediate structural beam (2) is mounted on the vehicle body, and the two sides are welded to the box body lining (1).

6. The lightweight sheet metal battery pack box according to claim 1, characterized in that: The intermediate structural beam (2) is an overall raised frame structure, wherein the middle portion is a raised support frame and the two sides are connecting frames.

7. A lightweight sheet metal battery pack box according to claim 6, characterized in that: The raised support frame is provided with a plurality of weight-reducing holes.

8. The lightweight sheet metal battery pack box according to claim 2, characterized in that: The ring beam (3) is in an "L"-shaped structure as a whole, and one vertical end is welded to the side of the box liner (1), and one horizontal end is welded to the bottom. The bottom of the ring beam (3) is also provided with a second installation groove corresponding to the first installation groove.

9. The lightweight sheet metal battery pack box according to claim 1, characterized in that: The bottom bracket beam (5) is embedded in a mounting groove opened at the bottom of the box body lining (1), and the bottom bracket beam (5) is connected to the box body lining (1), the middle structural beam (2) and the ring beam (3) by welding.

10. The lightweight sheet metal battery pack box according to claim 1, characterized in that: The box body lining (1), the middle structural beam (2), the ring beam (3), the module installation beam (4) and the bottom bracket beam (5) are all of an integrally formed design.

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