Preparation method of end plate of battery module for new energy vehicle, battery module and end plate

A technology for battery modules and new energy vehicles, applied in battery pack components, circuits, motor vehicles, etc., can solve problems such as cracking, explosive holes, and inability to meet cell expansion force conditions, and overcome low mechanical properties. , the effect of improving mechanical properties

Inactive Publication Date: 2021-11-05
润星泰常州技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the die-casting aluminum alloy and the 5-series extruded aluminum (between different materials) are welded by laser welding, they are prone to explosion holes and cracks
And it cannot meet the cell expansion force condition of the lithium battery module frame

Method used

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  • Preparation method of end plate of battery module for new energy vehicle, battery module and end plate
  • Preparation method of end plate of battery module for new energy vehicle, battery module and end plate

Examples

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preparation example Construction

[0036] In order to solve the above technical problems, the present invention provides a method for preparing an end plate of a battery module for a new energy vehicle, comprising:

[0037] S1: melting the raw materials to obtain liquid aluminum;

[0038] S2: Degassing;

[0039] S3: Die-casting to obtain blanks;

[0040] S4: Solid solution and aging treatment are performed on the blank.

[0041] In step S1, optionally, the raw materials may include aluminum ingots and returned materials; the weight percentage of the returned materials in the raw materials is ≤30%.

[0042] Wherein, the aluminum ingot can be a cast aluminum alloy with the grade A356.2 in the American ASTM B179:2006 standard, and the main components and the weight percentages of each component are: Si: 6.5-7.0%; Fe: ≤0.10%; Cu : ≤0.08%; Mn: ≤0.05%; Mg: 0.30~0.45%; Ti: 0.07~0.20%; Zn≤0.05%; Al is the balance. A356.2 brand aluminum alloy is used, its Fe: ≤0.10%, and the proportion of other elements in the alloy...

Embodiment 1

[0056] Put the aluminum ingots and returned materials into the smelting furnace at a ratio of 8:2, melt them, and the melting temperature is 740°C, and wait for the molten aluminum to reach the water discharge temperature of 750°C; before discharging the water, detect the chemical composition of the molten aluminum in the melting furnace, and pass through the molten aluminum Enter inert gas for rotary degassing so that the density index of the aluminum liquid is ≤0.05%; the temperature of the die-casting aluminum alloy liquid is 700°C, and the alloy liquid is formed into parts through a special mold and an ultra-low-speed process; the completed die-casting blank is subjected to solid solution and aging For treatment, the solid solution temperature is 530°C, heat preservation for 4 hours, quenching treatment in 60S, and the aging treatment temperature is controlled at 160°C, heat preservation for 4 hours.

[0057] Examples 2-5 and Comparative Examples 1-3 were prepared according...

Embodiment 6

[0065] The die casting prepared in Example 1 (raw material A356.2) was laser welded to the side plate of the extruded profile, and the performance of the weld was tested: the porosity was 0.8%, and the average welding strength was 23KN.

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Abstract

The invention belongs to the technical field of battery modules for new energy vehicles, and particularly relates to a preparation method of an end plate of a battery module for a new energy vehicle, the battery module and the end plate. The preparation method of the end plate of the battery module for the new energy vehicle comprises the following steps: S1, melting raw materials to obtain molten aluminum; S2, carrying out degassing; S3, performing die-casting forming to obtain a blank material; and S4, carrying out solid solution and aging treatment on the blank material. The preparation method has the beneficial effects that A356.2 aluminum alloy is selected as a main raw material, inert gas refining and degassing are performed on the aluminum alloy, and corresponding heat treatment parameters are set, so that the problem of low mechanical property caused by an unreasonable existing alloy material process is solved, the mechanical property of the aluminum alloy material is improved, and the welding requirements of the die-cast aluminum alloy battery end plate and extruded profile side plates can be met.

Description

technical field [0001] The invention belongs to the technical field of battery modules for new energy vehicles, and in particular relates to a method for preparing an end plate of a battery module for new energy vehicles, a battery module and an end plate. Background technique [0002] New energy vehicles refer to the use of unconventional vehicle fuels as power sources (or the use of conventional vehicle fuels and new vehicle power devices), and the comprehensive vehicle power control and advanced technology in driving, the formation of advanced technical principles, with Automobiles with new technology and new structure. New energy vehicles include four types of hybrid electric vehicles (HEV), pure electric vehicles (BEV, including solar vehicles), fuel cell electric vehicles (FCEV), and other new energy (such as super capacitors, flywheels and other high-efficiency energy storage) vehicles Wait. Unconventional vehicle fuels refer to fuels other than gasoline and diesel....

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C21/02C22C1/02C22C1/06C22F1/043H01M50/224H01M50/209H01M50/258
CPCC22C21/02C22C1/026C22C1/06C22F1/043C22F1/002H01M50/224H01M50/209H01M50/258Y02E60/10Y02T10/62
Inventor 朱尚辉黄景护
Owner 润星泰常州技术有限公司
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