Reinforcing device of frame and cross beam for battery pack

Abstract

The utility model discloses a reinforcing structure of a frame and a cross beam for a battery pack, which comprises a frame mounting part and a cross beam mounting part, the frame mounting part is connected with the cross beam mounting part, and the frame mounting part and the cross beam mounting part are respectively connected with the frame and the cross beam in a reinforcing manner. The frame and the cross beam are connected through the reinforcing structure, direct welding connection of the cross beam and the frame is avoided, and therefore the connection strength of the cross beam and the frame is improved, and the vibration failure risk caused by direct welding of the frame and the cross beam is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of new energy battery technology, and specifically relates to a reinforcing device for the frame and crossbeam of a battery pack. Background Technology

[0002] my country's current research and verification on the reliability and safety of power battery packs for new energy vehicles are among the world's best. The "GB 38031-2020 Safety Requirements for Power Batteries for Electric Vehicles" stipulates that after a vibration test, the battery pack should show no leakage, casing rupture, fire, or explosion. Most automakers also require that after the battery pack vibration test, there should be no casing rupture upon disassembly. Therefore, regardless of whether the casing is made of aluminum or steel, the crossbeam plays a crucial role in improving the overall rigidity and strength of the pack. Among casing failures, welding failures between the crossbeam and the frame account for a relatively high proportion. This welding failure is caused by two factors: firstly, the quality of the welding; and secondly, unreasonable design, where stress concentration occurs at the connection point due to the force transmitted from the frame to the crossbeam during vibration, resulting in weld failure.

[0003] Therefore, how to reduce the failure rate of the enclosure has become an increasingly urgent technical problem to be solved. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a reinforced structure for the frame and crossbeam of a battery pack, which is low in cost and improves the reliability and safety of the battery pack.

[0005] The purpose of this utility model is to provide a reinforcing structure for the frame and crossbeam of a battery pack, including a frame mounting part and a crossbeam mounting part, wherein the frame mounting part and the crossbeam mounting part are connected.

[0006] The frame mounting section and the crossbeam mounting section are reinforcedly connected to the frame and crossbeam, respectively.

[0007] Furthermore, the crossbeam mounting section includes a first connecting plate, a second connecting plate, a third connecting plate, and a fourth connecting plate, which are sequentially and vertically connected to form a hollow cavity parallel to the crossbeam.

[0008] Furthermore, the frame mounting portion includes a fifth connecting plate and a sixth connecting plate, which are perpendicularly connected to the first connecting plate and the third connecting plate, respectively.

[0009] Furthermore, the frame mounting part and the crossbeam mounting part are integrally formed.

[0010] Furthermore, each of the first to sixth connecting plates is provided with at least one first connecting hole, wherein,

[0011] The sides of the first to fourth connecting plates located inside the hollow cavity are all in contact with the outer side of the crossbeam and are fixedly connected to the crossbeam by fasteners.

[0012] One side of the fifth and sixth connecting plates is attached to the frame and connected to the frame by fasteners.

[0013] Furthermore, the frame mounting part and the crossbeam mounting part are respectively a first connecting plate and a second connecting plate connected at an angle, and both the first connecting plate and the second connecting plate are plate-shaped structures.

[0014] Furthermore, both the first connecting plate and the second connecting plate are provided with at least one first connecting hole, wherein,

[0015] The first connecting plate is attached to the frame, and the first connecting hole on the first connecting plate is used to fasten the plate to the frame with fasteners.

[0016] The second connecting plate is attached to the crossbeam, and the first connecting hole on the second connecting plate is used to connect to the frame through fasteners.

[0017] Furthermore, the fastener is a rivet.

[0018] This invention strengthens the connection between the frame and the crossbeam by reinforcing the structural connection, avoiding direct welding between the crossbeam and the frame. This improves the connection strength between the crossbeam and the frame and reduces the risk of vibration failure caused by direct welding. Furthermore, the reinforced structure is easy to assemble and disassemble; and during application, the stress on the crossbeam and frame is significantly reduced. Combined with actual vibration effects, the pass rate is significantly increased. Therefore, the cost of the aforementioned reinforced structure is low, and the benefits far outweigh the increased cost, improving the reliability and safety of the battery pack.

[0019] Other features and advantages of this invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained by means of the structures pointed out in the description, claims, and drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 The figure shows an overall axonometric perspective view of the crossbeam reinforcement structure with only an integral reinforcing plate and rivets on the outer side, according to Embodiment 1 of this utility model.

[0022] Figure 2 This diagram shows a partially enlarged view of the mating state at connection position I in Embodiment 1 of the present invention;

[0023] Figure 3 The figure shows an overall axonometric perspective view of the crossbeam reinforcement structure with only split reinforcing plates and rivets on the outer side, according to Embodiment 2 of this utility model.

[0024] Figure 4 This diagram shows a partially enlarged view of the mating state at connection position II in Embodiment 2 of this utility model;

[0025] The labels for each figure are as follows: 1-frame; 2-beam; 3-reinforcing structure; 4-frame mounting part; 41-fifth mounting plate; 42-sixth mounting plate; 5-beam mounting part; 51-first connecting plate; 52-second connecting plate; 53-third connecting plate; 54-fourth connecting plate; 6-sixth mounting plate; 7-seventh mounting plate; 8-rivet. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0027] Example 1

[0028] like Figure 1 , 2As shown in the figure, this utility model embodiment introduces a reinforcing structure for the frame and crossbeam of a battery pack. The reinforcing structure 3 includes a frame mounting part 4 and a crossbeam mounting part 5. The frame mounting part 4 is located on both sides of the crossbeam mounting part 5 and is integrally formed with the crossbeam mounting part 5. The crossbeam mounting part 5 includes a first connecting plate 51, a second connecting plate 52, a third connecting plate 53, and a fourth connecting plate 54. The first connecting plate 51, the second connecting plate 52, the third connecting plate 53, and the fourth connecting plate 54 are vertically connected in sequence to form a hollow cavity parallel to the crossbeam. The frame mounting part 4 includes a fifth connecting plate 41 and a sixth connecting plate 42. The fifth connecting plate 41 and the sixth connecting plate 42 are vertically connected to the first connecting plate 51 and the third connecting plate 54, respectively. Furthermore, each of the first to sixth connecting plates is provided with at least one first connecting hole. The first to fourth connecting plates are located inside the hollow cavity and are fitted against the outer side of the crossbeam, with the corresponding first connecting holes used for fixed connection to the crossbeam via fasteners. One side of the fifth and sixth connecting plates is fitted against the frame, and the corresponding first connecting holes are used for connection to the frame via fasteners. The reinforcing structure is an integral reinforcing plate 3, a profile component, applicable to roll-formed steel or steel boxes.

[0029] In this embodiment of the utility model, the fastener is a rivet 8.

[0030] In application, the first step is to connect the integrated reinforcing plate 3 to the outside of the battery pack crossbeam 2 via rivets 8; the second step is to connect the connected crossbeam 2 and integrated reinforcing plate 3 assembly to the battery pack frame 1 via rivets 8.

[0031] By strengthening the structural connection between the frame and the crossbeam, direct welding between the crossbeam and the frame is avoided, thereby improving the connection strength between the crossbeam and the frame and reducing the risk of vibration failure caused by direct welding between the frame and the crossbeam.

[0032] Example 2

[0033] like Figure 3 , 4As shown in the embodiment of this utility model, another reinforcing structure for the frame and crossbeam of the battery pack is also introduced. The reinforcing structure 3 includes a frame mounting part 4 and a crossbeam mounting part 5. The frame mounting part 4 is located at the crossbeam mounting part 5 and is a seventh connecting plate 6 and an eighth connecting plate 7 connected at an angle. Both the seventh and eighth connecting plates are plate-shaped structures, and each of the seventh and eighth connecting plates has at least one first connecting hole. The seventh connecting plate is attached to the frame 1, and the first connecting hole on the seventh connecting plate is used to fasten it to the frame 1 with fasteners. The eighth connecting plate is attached to the crossbeam 2, and the first connecting hole on the eighth connecting plate is used to connect it to the frame with fasteners. Furthermore, at least two reinforcing structures 3 are used when reinforcing the frame 1 and the crossbeam 2. The two reinforcing structures 3 form a split reinforcing plate, wherein a positioning hole for accommodating the crossbeam is formed between the eighth connecting plates of each reinforcing structure. The split reinforcing plate 3 is mostly used for steel boxes, and the split reinforcing plate is a bent part. By strengthening the structural connection between the frame and the crossbeam, direct welding between the crossbeam and the frame is avoided, thereby improving the connection strength between the crossbeam and the frame and reducing the risk of vibration failure caused by direct welding between the frame and the crossbeam.

[0034] In this embodiment of the utility model, the fastener is a rivet 8.

[0035] In application, the first step is to connect the reinforcing structure 3 to the inside of the battery pack crossbeam 2 using rivets 8; the second step is to connect the connected crossbeam 2 and reinforcing structure 3 assembly to the battery pack frame 1 using rivets 8.

[0036] In this embodiment of the invention, by strengthening the structural connection between the frame and the crossbeam, direct welding between the crossbeam and the frame is avoided, thereby improving the connection strength between the crossbeam and the frame and reducing the risk of vibration failure caused by direct welding between the frame and the crossbeam. Furthermore, each type of reinforcement structure is easy to assemble and disassemble; and the stress on the frame and crossbeam is significantly reduced during application. Combined with actual vibration effects, the pass rate is significantly increased. Therefore, the cost of the above-mentioned reinforcement structure is low, and the benefits achieved far outweigh the increased cost, improving the reliability and safety of the battery pack.

[0037] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A reinforcing structure of a frame and a cross beam for a battery pack, characterized by, The frame mounting portion and the beam mounting portion are connected, wherein, The frame mounting portion and the beam mounting portion are respectively connected to the frame and the beam; The beam mounting portion comprises a first connecting plate, a second connecting plate, a third connecting plate and a fourth connecting plate, which are connected in sequence and vertically to form a hollow cavity parallel to the beam; The frame mounting portion comprises a fifth connecting plate and a sixth connecting plate, which are respectively connected to the first connecting plate and the third connecting plate; At least one first connecting hole is arranged on each of the first connecting plate to the sixth connecting plate, wherein, One side of the first connecting plate to the fourth connecting plate inside the hollow cavity is attached to the outer side of the beam, and is fixedly connected to the beam through a fastener; One side of the fifth connecting plate and the sixth connecting plate is attached to the frame, and is connected to the frame through a fastener.

2. The reinforcing structure of the frame and beam for a battery pack according to claim 1, characterized by, The frame mounting portion and the beam mounting portion are integrally arranged.

3. The reinforcing structure of the frame and beam for a battery pack according to claim 2, characterized by, The fastener is a rivet.

4. A reinforcing structure of a frame and a cross beam for a battery pack, characterized by, The frame mounting portion and the beam mounting portion are connected, wherein, The frame mounting portion and the beam mounting portion are respectively connected to the frame and the beam; The frame mounting portion and the beam mounting portion are respectively a first connecting plate and a second connecting plate connected at an angle, and the first connecting plate and the second connecting plate are both plate-shaped structures.

5. The reinforcing structure of the frame and beam for a battery pack according to claim 4, characterized by, At least one first connecting hole is arranged on each of the first connecting plate and the second connecting plate, wherein, The first connecting plate is attached to the frame, and the first connecting hole on the first connecting plate is used for fastening connection to the frame through a fastener; The second connecting plate is attached to the beam, and the first connecting hole on the second connecting plate is used for connection to the frame through a fastener.

6. The reinforcing structure of the frame and beam for a battery pack according to claim 5, wherein The fastener is a rivet.

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