An integrated cold plate stamped steel battery lower case

Abstract

An integrated cold plate stamping steel battery lower shell, including stamping tray, roll pressing reinforced beam, cold plate support, cold plate, internal cross beam, L type support, in the utility model, compared with extrusion type aluminum alloy battery lower shell, the process is simple, the material cost is lower, the integrated stamping type shell reduces the assembly step, reduces the welding seam, improves the sealing performance, simultaneously, the liquid cooling plate is embedded in the containing cavity on the stamping tray, can improve the heat dissipation performance of the battery, improves the assembly efficiency, reduces the production cost.

Description

Technical Field

[0001] This utility model relates to the field of new energy vehicle battery casing technology, and in particular to a stamped steel battery lower casing with integrated liquid cooling plate. Background Technology

[0002] The safety and heat dissipation performance of power batteries in new energy vehicles are crucial. Currently, the lower casing of power batteries is mostly made of aluminum alloy, manufactured through extrusion molding and welding processes. Existing aluminum alloy casings have the following drawbacks: First, aluminum alloy casings are weaker than steel in terms of impact resistance and deformation performance. To improve their performance, additional reinforcing components or increased frame wall thickness are required, which increases their weight and manufacturing costs. Second, current aluminum alloy casings mostly rely on welded connections. Welding quality issues or long-term use can easily lead to weld failure due to vibration, affecting sealing performance. Third, when installing liquid cooling plates to increase heat dissipation performance, multiple liquid cooling plate fixing components need to be welded. Therefore, to solve the above problems, there is an urgent need for a high-strength, lightweight, and low-cost integrated battery lower casing solution that can effectively integrate with the liquid cooling plate while ensuring strength, thereby improving the overall performance of the battery system. Utility Model Content

[0003] The purpose of this invention is to provide an integrated cold-plate stamped steel battery lower casing that, while ensuring strength, achieves effective integration with the liquid cooling plate and improves the overall performance of the battery system.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An integrated cold-plate stamped steel battery lower casing includes a stamped tray, a roll-formed reinforcing beam, a cold-plate support, a cold plate, an internal crossbeam, and an L-shaped bracket. The stamped tray is made of high-strength steel plate and stamped into a basin-shaped main structure. A protrusion is provided at the bottom of the stamped tray, and a receiving cavity is formed between two adjacent protrusions. The cold plate is embedded in the receiving cavity. The cold plate, the cold plate support, and the stamped tray are glued together. The roll-formed reinforcing beam is symmetrically arranged on the left and right outer sides of the stamped tray and is connected to the side wall of the stamped tray by spot welding. The internal crossbeam is located inside the stamped tray casing, spanning the left and right sides, and its two ends are spot welded to the side wall of the stamped tray by L-shaped brackets. The L-shaped brackets are connected to the internal crossbeam by pop rivets. A liquid collection pipe is provided on one side of the cold plate, and a water inlet and a water outlet are provided on the liquid collection pipe.

[0005] The aforementioned integrated cold-plate stamped steel battery lower casing has spot-welded connections at both ends of the internal crossbeam, where the internal crossbeam is spot-welded to the bottom of the stamping tray.

[0006] The aforementioned integrated cold-pressed steel battery lower casing has a roll-formed reinforcing beam filled with lightweight foam material to achieve vibration reduction and noise reduction.

[0007] For the above integrated cold plate stamping steel battery lower housing, the material of the cold plate support is foam or cotton material.

[0008] The utility model has the following advantages: In the utility model, compared with the extruded aluminum alloy battery lower housing, the steel stamping tray has a simple process and lower material cost. The one-piece stamping housing reduces the assembly steps and the welding seams, improving the sealing performance. At the same time, the liquid cooling plate is embedded in the accommodation cavity on the stamping tray, which can improve the heat dissipation performance of the battery, enhance the assembly efficiency, and reduce the production cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 is an exploded view schematic diagram of the utility model; Figure 2 is a schematic diagram of the utility model; Figure 3 is Figure 2 view A of Figure 4 is a structural diagram of the internal cross beam; In the figure, each reference numeral represents: 1, stamping tray, 2, roll-pressed reinforcing beam, 3, cold plate support, 4, cold plate, 5, internal cross beam, 6, L-shaped bracket, 7, liquid collecting pipe, 8, water inlet nozzle, 9, water outlet nozzle, 10, convex part, 11, accommodation cavity, 5-1, spot welding connection part. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0010] The following further describes the utility model with reference to the drawings and embodiments.

[0011] An integrated cold plate stamping steel battery lower housing of the utility model, as Figure 1 and Figure 2 shown, the stamping tray 1 is made of high-strength steel plate with a thickness of 1.2 mm and is in a basin shape. There are multiple upward convex parts 10 at the bottom of the stamping tray 1, and multiple accommodation cavities 11 are formed between two adjacent convex parts 10. The cold plate 4 is a straight cold plate in the shape of a harmonica and is embedded in the accommodation cavity 11. The cold plate support 3 is made of cotton material. The cold plate 4, the cold plate support 3 and the stamping tray 1 are adhesively fixed together. The roll-pressed reinforcing beam 2 is made of 1 mm steel plate by roll-pressing, and its cross-section is in the shape of "B", symmetrically arranged on the left and right outer sides of the stamping tray 1 and connected to the side wall of the stamping tray 1 by spot welding to enhance the longitudinal bending strength and side impact strength of the stamping tray 1. The internal cross beam 5 is made of 1 mm steel plate by bending, and its cross-section is in the shape of "Ji", arranged inside the housing of the stamping tray 1, spanning the left and right sides, and the two ends are connected to the side wall of the stamping tray 1 by spot welding through the L-shaped bracket 6. The L-shaped bracket 6 and the internal cross beam 5 are connected by blind rivets.

[0012] The present invention provides an integrated cold-plate stamped steel battery lower casing, wherein the two ends of the internal crossbeam 5 are provided with spot-welded connection parts 5-1, and the internal crossbeam 5 is spot-welded to the bottom of the stamping tray (1) at the spot-welded connection parts 5-1.

[0013] The present invention provides an integrated cold-plate stamped steel battery lower housing, which on the one hand connects the internal crossbeam 5 to the bottom of the stamping tray 1, and on the other hand restricts the position of the cold plate 4 through this connection, ensuring the effective assembly of the internal parts of the stamping tray.

[0014] This utility model discloses an integrated cold plate stamped steel battery lower housing. A liquid collection pipe 7 is provided on one side of the cold plate 4. A water inlet 8 and a water outlet 9 are provided on the liquid collection pipe 7. The water inlet 8 and the water outlet 9 are respectively connected to the external pipeline of the battery housing to complete the circulation of liquid inside the cold plate 4.

Claims

1. An integrated cold plate stamped steel battery lower case, characterized by: The system includes a stamped tray (1), a roll-formed reinforcing beam (2), a cold plate support (3), a cold plate (4), an internal crossbeam (5), and an L-shaped bracket (6). The stamped tray (1) is made of high-strength steel plate and is stamped into a basin-shaped main structure. A protrusion (10) is provided at the bottom of the stamped tray (1), and a receiving cavity (11) is formed between two adjacent protrusions (10). The cold plate (4) is embedded in the receiving cavity (11), and the cold plate (4), the cold plate support (3), and the stamped tray (1) are glued together. The roller-pressed reinforcing beams (2) are symmetrically arranged on the left and right sides of the stamping tray (1) and are spot-welded to the side wall of the stamping tray (1). The internal crossbeam (5) is located inside the shell of the stamping tray (1) and spans the left and right sides. Both ends are spot-welded to the side wall of the stamping tray (1) through L-shaped brackets (6). The L-shaped brackets (6) are connected to the internal crossbeam (5) through pull rivets. A liquid collection pipe (7) is provided on one side of the cold plate (4). A water inlet (8) and a water outlet (9) are provided on the liquid collection pipe (7).

2. An integrated cold plate stamped steel battery lower case according to claim 1, wherein: The inner crossbeam (5) is provided with spot welded connection parts (5-1) at both ends, and the inner crossbeam (5) is spot welded to the bottom of the stamping tray (1) at the spot welded connection parts (5-1).

3. The integrated cold plate stamped steel battery lower case of claim 1, wherein: The inside of the roller-pressed reinforced beam (2) is filled with lightweight foam material to achieve the purpose of shock absorption and noise reduction.

4. The integrated cold plate stamped steel battery lower case of claim 1, wherein: The material of the cold plate support (3) is foam or cotton.

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