A liquid-cooled integrated new energy vehicle battery lower shell

Abstract

A kind of liquid-cooled integrated new energy automobile battery lower shell, including liquid cooling plate, internal reinforcing plate, stamping shell, bottom guard plate, shell mounting, the utility model discloses battery lower shell is made by stamping, internal reinforcing plate spot welding in shell inner cavity, increase the overall rigidity of shell, liquid cooling plate is riveted on internal reinforcing plate by self-punching riveting process, cancel the original battery shell inside horizontal beam and other components in structure, structure is simpler, the battery shell structure of stamping provides greater flexibility for the layout of internal electrical components, effectively reduces the weld quantity of steel battery shell, the utility model reduces the difficulty of process processing, can reduce production cost while, improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery casing manufacturing technology, and in particular to a liquid-cooled integrated lower casing for new energy vehicle batteries. Background Technology

[0002] With the widespread application of electric vehicles and other energy storage devices, the design and manufacturing of battery casings face increasingly stringent requirements, especially in balancing strength and weight, the complexity of processing technology, and cost control. Existing aluminum alloy casings for new energy vehicle batteries suffer from relatively weak impact resistance and deformation performance, numerous weld seams, and susceptibility to weld failure due to vibration over long-term use. Steel roll-formed battery casings, using a roll-forming process, can only achieve continuous forming with uniform cross-sections, making it difficult to process irregular structures and limiting the space utilization of the battery pack. Steel casings require segmented casings connected by laser welding or bolts, increasing the number of weld seams by 3-5 times compared to integrally stamped aluminum casings. Roll-formed steel battery packs require 30% more welding time than aluminum solutions, and are prone to micro-cracks in the heat-affected zone. In terms of process, when using ultra-high-strength steel with a strength >1000MPa, the roll springback can reach 0.5-1mm. To overcome the shortcomings of aluminum and roll-formed steel casings, we have developed a lightweight stamped battery lower casing that is structurally conducive to liquid-cooled plate installation, meets strength requirements, facilitates the installation of explosion-proof valves and connectors, and is lightweight. Utility Model Content

[0003] The purpose of this utility model is to provide a liquid-cooled integrated lower housing for new energy vehicle batteries that meets strength requirements, facilitates the installation of liquid cooling plates, makes it convenient to install explosion-proof valves and connectors, and achieves lightweight design.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: A liquid-cooled integrated lower housing for a new energy vehicle battery includes a liquid cooling plate, an internal reinforcing plate, a stamped housing, a bottom protective plate, and a housing mount. The stamped housing is made of steel and stamped into a basin shape. The internal reinforcing plate is located in the inner cavity of the stamped housing and the two are welded together. The bottom protective plate is located on the lower outer surface of the stamped housing and is connected to the stamped housing by projection welding nuts. The housing mount is spot-welded to the stamped housing. The liquid cooling plate is installed on the internal reinforcing plate.

[0005] The aforementioned liquid-cooled integrated lower housing of a new energy vehicle battery has a boss on the internal reinforcing plate and cold plate clearance holes on the liquid cooling plate. The positions and numbers of the boss and the cold plate clearance holes correspond to each other. The liquid cooling plate is riveted to the internal reinforcing plate using rivets at the cold plate clearance holes.

[0006] The aforementioned liquid-cooled integrated lower housing of a new energy vehicle battery has mounting sleeves installed on the housing mount, distributed on the four sides of the stamped housing, with two or more mounting sleeves on each side.

[0007] This utility model has the following advantages: In this invention, the lower battery casing is stamped, and an internal reinforcing plate is spot-welded into the inner cavity of the casing, increasing the overall rigidity of the casing. The liquid cooling plate is riveted to the internal reinforcing plate using a self-piercing riveting process. Structurally, this eliminates the need for the original transverse and longitudinal beams and other components inside the battery casing, resulting in a simpler structure. The stamped battery casing structure provides greater flexibility for the layout of internal electrical components and effectively reduces the number of welds in the steel battery casing. This invention reduces the difficulty of processing and can improve production efficiency while reducing production costs. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the present invention; Figure 2 for Figure 1 Exploded view; Figure 3 This is a schematic diagram of the internal reinforcement plate; The labels in the figure represent: 1. Mounting sleeve, 2. Liquid cooling plate, 3. Internal reinforcing plate, 4. Stamped shell, 5. Bottom protective plate, 6. Shell mounting, 7. Rivet, 8. Cold plate clearance hole, 3-1. Boss. Detailed Implementation

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] This utility model discloses a liquid-cooled integrated lower housing for a new energy vehicle battery, such as... Figure 1 and Figure 2 As shown, the stamped housing 4 is made of steel and stamped into a basin shape. The internal reinforcing plate 3 is located in the inner cavity of the stamped housing 4 and the two are welded together. The bottom protective plate 5 is set on the lower outer surface of the stamped housing 4 and is connected to the stamped housing 4 by projection welding nuts. The housing hanger 6 is spot welded to the stamped housing 4. The liquid cooling plate 2 is installed on the internal reinforcing plate 3. The internal reinforcing plate 3 has a boss 3-1. The liquid cooling plate 2 has cold plate clearance holes 8. The position and number of the boss 3-1 and the cold plate clearance holes 8 correspond. The liquid cooling plate 2 is riveted to the internal reinforcing plate 3 at the cold plate clearance holes 8 using rivets 7. The connection position between the internal reinforcing plate 3, the stamped housing 4, the bottom protective plate 5, and the liquid cooling plate 2 can be adjusted by stamping the fitting position according to actual usage requirements. The crossbeam structure in the existing battery case structure is eliminated, improving the internal space utilization of the battery pack. The steel stamped housing improves rigidity and reduces weight.

[0011] This utility model discloses a liquid-cooled integrated lower housing for a new energy vehicle battery. The internal reinforcing plate 3 primarily increases the overall rigidity of the battery housing. Multiple protrusions 3-1 are provided on the internal reinforcing plate 3 to provide a mounting position between the liquid-cooling plate 2 and the stamped housing 4. Grooves are cut into the internal reinforcing plate 3 at locations where there is no connection with the stamped housing 4 or the liquid-cooling plate 2 to reduce weight, thus ensuring both the overall strength and lightweight design of the housing.

[0012] This utility model discloses a liquid-cooled integrated lower housing for a new energy vehicle battery. The housing mount 6 is welded onto a stamped housing 4, and multiple mount sleeves 1 are provided on it for supporting and connecting with external parts.

Claims

1. A liquid-cooled integrated new energy vehicle battery lower shell, characterized in that: The system includes a liquid cooling plate (2), an internal reinforcing plate (3), a stamped shell (4), a bottom protective plate (5), and a shell mounting plate (6). The stamped shell (4) is made of steel and stamped into a basin shape. The internal reinforcing plate (3) is located in the inner cavity of the stamped shell (4) and the two are welded together. The bottom protective plate (5) is located on the lower outer surface of the stamped shell (4) and is connected to the stamped shell (4) by a projection weld nut. The shell mounting plate (6) is spot welded to the stamped shell (4). The liquid cooling plate (2) is installed on the internal reinforcing plate (3).

2. The liquid-cooled integrated new energy vehicle battery lower shell according to claim 1, characterized in that: The internal reinforcing plate (3) is provided with a boss (3-1), and the liquid cooling plate (2) is provided with a cold plate clearance hole (8). The boss (3-1) and the cold plate clearance hole (8) are in the same position and number. The liquid cooling plate (2) is riveted to the internal reinforcing plate (3) using a rivet (7) at the cold plate clearance hole (8).

3. The liquid-cooled integrated new energy vehicle battery lower shell according to claim 1, characterized in that: The mounting sleeves (1) are installed on the housing mounting (6) and distributed on the four sides of the stamped housing (4). There are more than two mounting sleeves on each side.

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