CN-122007194-A - Extrusion molding method of battery-coated aluminum alloy section bar and aluminum alloy section bar

CN122007194ACN 122007194 ACN122007194 ACN 122007194ACN-122007194-A

Abstract

The application belongs to the field of extrusion control of aluminum profiles, and discloses a battery pack aluminum alloy profile extrusion molding method and a correspondingly produced aluminum alloy profile. Corresponding temperature values of a plurality of cavity positions of the extrusion die for extruding a plurality of parallel cooling channels of the profile are obtained in real time, the maximum value and the minimum value are determined from the corresponding temperature values, and the difference value between the maximum value and the minimum value is calculated to be used as the maximum cavity temperature difference. When the difference exceeds a preset threshold, a preset temperature adjustment power value is obtained first, whether the real-time heating power of the chamber corresponding to the minimum temperature is lower than the maximum heating power of the chamber corresponding to the minimum temperature is checked, if yes, the heating power of the chamber corresponding to the maximum temperature is synchronously regulated down, the heating power of the chamber corresponding to the minimum temperature is regulated up, the adjustment amplitude is the preset adjustment power value, the temperature of each chamber is balanced, and the extrusion molding quality of the battery pack aluminum alloy section with multiple parallel cooling channels is improved.

Inventors

LEI XIAOHONG
ZHU QUANFENG
CAO XIAOJUN

Assignees

清远市钛美铝业有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. An extrusion molding method of a battery pack aluminum alloy profile, which is characterized by comprising the following steps: the method comprises the steps of acquiring a plurality of chamber temperature values corresponding to a plurality of chamber positions of an extrusion die in real time, wherein the plurality of chamber positions are used for extruding a plurality of parallel cooling channels of a battery pack aluminum alloy section bar, determining a maximum chamber temperature value and a minimum chamber temperature value in the plurality of chamber temperature values, determining a difference value between the maximum chamber temperature value and the minimum chamber temperature value as a maximum chamber temperature difference value, and acquiring a preset temperature adjustment power value when the maximum chamber temperature difference value is larger than the preset maximum chamber temperature difference value; When the real-time second heating power is smaller than the maximum second heating power, the real-time first heating power of the first chamber position corresponding to the maximum chamber temperature value is reduced by a preset temperature adjustment power value, and the real-time second heating power of the second chamber position corresponding to the minimum chamber temperature value is increased by the preset temperature adjustment power value.
2. The method according to claim 1, wherein the method further comprises: When the real-time second heating power is larger than or equal to the maximum second heating power, the minimum chamber temperature value in the plurality of chamber temperature values is removed, and then the minimum chamber temperature value is redetermined; when the maximum chamber temperature difference is larger than a preset maximum chamber temperature difference, a preset temperature regulation power value is determined according to the maximum chamber temperature difference; And when the real-time second heating power is smaller than the maximum second heating power, reducing the real-time first heating power of the first chamber position corresponding to the maximum chamber temperature value by a preset temperature adjustment power value, and increasing the real-time second heating power of the second chamber position corresponding to the minimum chamber temperature value by the preset temperature adjustment power value.
3. The method according to claim 2, wherein the method further comprises: Reducing the real-time first heating power of the first chamber position corresponding to the maximum chamber temperature value by a preset temperature adjustment power value, and after increasing the real-time second heating power of the second chamber position corresponding to the minimum chamber temperature value by the preset temperature adjustment power value, determining a change value of the maximum chamber temperature difference value as a chamber temperature adjustment value when the maximum chamber temperature difference value is larger than the preset maximum chamber temperature difference value; When the chamber temperature adjustment value is smaller than the preset chamber temperature adjustment value, the local extrusion speed of the first chamber position corresponding to the maximum chamber temperature value is reduced by 0.5% -2%, and the local extrusion speed of the second chamber position corresponding to the minimum chamber temperature value is increased by 0.5% -2%.
4. A method according to claim 3, characterized in that the method further comprises: reducing the real-time first heating power of the first chamber position corresponding to the maximum chamber temperature value by a preset temperature adjustment power value, and after increasing the real-time second heating power of the second chamber position corresponding to the minimum chamber temperature value by the preset temperature adjustment power value, acquiring the maximum chamber temperature difference again; and when the real-time forming deviation index is smaller than the preset real-time forming deviation index, reducing the preset maximum chamber temperature difference value to adjust the preset maximum chamber temperature difference value.
5. The method according to claim 4, wherein the method further comprises: The method comprises the steps of obtaining a plurality of forming record data corresponding to a plurality of production batches, clustering the forming record data to obtain a plurality of forming record groups, wherein the forming record data comprise a plurality of cavity temperature values, maximum cavity temperature difference values, cavity heating power values, temperature adjustment power values, local extrusion speeds and forming deviation indexes of a plurality of parallel cooling channels; And determining a target forming record group to which the current extrusion forming process belongs, and determining a temperature adjustment power average value corresponding to the target forming record group as a preset temperature adjustment power value corresponding to the current extrusion forming process.
6. The method of claim 5, wherein determining the set of target molding records to which the current extrusion process belongs comprises: Determining the current chamber temperature characteristics corresponding to the plurality of chamber temperature values corresponding to the current extrusion forming process, determining the chamber temperature average values corresponding to the plurality of forming record groups, and determining the chamber temperature average value characteristics corresponding to the plurality of chamber temperature average values; determining the difference value of the current maximum chamber temperature difference value and the maximum chamber temperature difference average value as the chamber temperature extreme value difference degree; Determining the sum of the chamber temperature difference degree and the chamber temperature extreme value difference degree of the plurality of forming record groups as a plurality of extrusion parameter difference degrees corresponding to the plurality of forming record groups; and determining a forming record group corresponding to the minimum extrusion parameter difference degree as a target forming record group to which the current extrusion forming process belongs.
7. The method of claim 6, wherein the method further comprises: acquiring a chamber temperature difference weight and a chamber temperature extreme value difference weight corresponding to the current extrusion molding process; and determining the sum of the products of the chamber temperature difference degree and the chamber temperature difference weight of the plurality of forming record groups and the products of the chamber temperature extreme value difference degree and the chamber temperature extreme value difference weight as a plurality of extrusion parameter difference degrees corresponding to the plurality of forming record groups.
8. The method of claim 7, wherein the method further comprises: And taking the average molding deviation index as a preset real-time molding deviation index corresponding to the real-time molding deviation index of the current extrusion molding process.
9. The method of claim 8, wherein the method further comprises: Determining the difference value of the maximum forming deviation index and the minimum forming deviation index corresponding to the plurality of chamber positions as the forming deviation index extreme value corresponding to the plurality of forming record data; And determining the average value of the forming deviation index extremum corresponding to the plurality of forming record data as the forming deviation index average value corresponding to the plurality of forming record data of the target forming record group.
10. An aluminum alloy profile, characterized in that it is produced by extrusion molding using the extrusion molding method of a battery pack aluminum alloy profile according to any one of claims 1 to 9.

Description

Extrusion molding method of battery-coated aluminum alloy section bar and aluminum alloy section bar Technical Field The application relates to the technical field of aluminum profile extrusion control, in particular to an extrusion molding method of a battery-coated aluminum alloy profile and the aluminum alloy profile. Background Extrusion molding is a common molding process in the field of battery aluminum alloy profile processing, and the current extrusion molding equipment can extrude and mold a plurality of battery aluminum alloy profiles with parallel cooling channel structures. In practical production application, extrusion molding equipment can adapt to aluminum alloy blanks with different specifications, and the battery-coated aluminum alloy section bar with the preset number of cooling channels, channel arrangement mode and external dimension is obtained through regulating and controlling the extrusion speed, blank heating temperature and other technological parameters in the extrusion process, so that a basic member is provided for the assembly of a follow-up battery-coated heat dissipation system, and the method is suitable for processing and preparing links of the aluminum alloy section bar in the scenes of new energy automobile power battery packs and the like. In the process of processing battery pack aluminum alloy sections containing a plurality of parallel cooling channels, the conventional extrusion molding equipment cannot realize online real-time detection of wall thickness uniformity parameters of each cooling channel in the section molding process, is difficult to timely regulate and control deflection and collapse defects of channels in the extrusion process, can verify section quality only in an off-line spot inspection mode, cannot guarantee the consistency of cooling channels of sections produced in batches, is easy to solve the problems that partial section cooling channels are insufficient in flow capacity and not up to standard in structural strength, is difficult to realize effective full-process quality control on the battery pack aluminum alloy sections containing a plurality of parallel cooling channels, leads to lower product yield, and cannot match section supply requirements of high-reliability battery packs. Disclosure of Invention The application aims to provide an extrusion molding method of a battery pack aluminum alloy section bar and an aluminum alloy section bar, solves the technical problem that effective quality control cannot be performed on the battery pack aluminum alloy section bar with a plurality of parallel cooling channels, and achieves the technical effect of effective quality control on the battery pack aluminum alloy section bar with a plurality of parallel cooling channels. In a first aspect, an embodiment of the application provides an extrusion molding method of a battery pack aluminum alloy section, which comprises the steps of obtaining a plurality of chamber temperature values corresponding to a plurality of chamber positions of an extrusion mold in real time, wherein the plurality of chamber positions are used for extruding a plurality of parallel cooling channels of the battery pack aluminum alloy section, determining a maximum chamber temperature value and a minimum chamber temperature value in the plurality of chamber temperature values, determining a difference value between the maximum chamber temperature value and the minimum chamber temperature value as the maximum chamber temperature difference value, obtaining a preset temperature adjustment power value when the maximum chamber temperature difference value is larger than a preset maximum chamber temperature difference value, obtaining real-time second heating power and maximum second heating power of a second chamber position corresponding to the minimum chamber temperature value, reducing the preset temperature adjustment power value for the real-time first heating power of a first chamber position corresponding to the maximum chamber temperature value when the real-time second heating power is smaller than the maximum second heating power, and increasing the preset temperature adjustment power value for the real-time second heating power of the second chamber position corresponding to the minimum chamber temperature value. In one possible implementation manner, the method further comprises the steps of removing a minimum chamber temperature value from the plurality of chamber temperature values when the real-time second heating power is greater than or equal to the maximum second heating power, determining a difference between the maximum chamber temperature value and the minimum chamber temperature value as a maximum chamber temperature difference, determining a preset temperature adjustment power value according to the maximum chamber temperature difference when the maximum chamber temperature difference is greater than the preset maximum chamber temperature difference, re-acquiri