Method for connecting two components and component composite

Patent metadata

Field	Value
Publication number	US-11534864-B2
Application number	US-201917057577-A
Country	US
Kind code	B2
Filing date	May 27, 2019
Priority date	Jun 20, 2018
Publication date	Dec 27, 2022
Grant date	Dec 27, 2022

Abstract

A method for connecting two components with the aid of a laser weld seam. The two components are situated one above the other in a joining area. The first component is pressed in the direction of the second component with the aid of a clamping device. A laser beam impacts the first component on the side facing away from the second component and at least indirectly fusing material of the two components.

First claim

What is claimed is:

1. A method for connecting two components, the method comprising the following steps:
situating the two components one above the other in a joining area;
applying a clamping force to a point of a first component of the two components in a direction of a second component of the two components by impacting the point of the first component with an object surface; and
generating a laser weld seam by impacting a laser beam on the first component on a side facing away from the second component to at least indirectly fuse material of the two components;
wherein:
the first component has a thickness in a joining area between 5 μm and 500 μm;
the impacting of the laser beam begins at the point at which the clamping force is applied and the impacting of the laser beam continues in a line away from the point at which the clamping force is applied, without the clamping force being externally applied along the line other than at the point; and
the impacting of the laser beam continuing in the line is effected by the laser beam being moved relative to the two components.

2. The method as recited in claim 1 , wherein:
the thickness of the first component in the joining area is less than 100 μm;
a horizontal extension or a width of in the joining area is between 0.5 mm and 20 mm; and
a focus diameter of the laser beam in an area of the first component is between 50 μm and 1000 μm.

3. The method as recited in claim 1 , wherein a focus diameter of the laser beam in an area of the first component is between 50 μm and 1000 μm.

4. The method as recited in claim 3 , wherein the focus diameter is between 200 μm and 600 μm.

5. The method as recited in claim 1 , wherein the laser beam has a wavelength in visible light, the wavelength being less than 1000 nm, at least at the beginning of the welding process, and the welding is carried out by heat conduction welding.

6. The method as recited in claim 5 , wherein the first component includes copper, or aluminum, or silver, or gold, and the wavelength of the laser beam is in a green or blue wavelength range.

7. The method as recited in claim 5 , wherein after formation of a part of the laser weld seam by heat conduction welding, the wavelength of the laser beam is changed to be above 1000 nm to carry out a deep welding process.

8. The method as recited in claim 7 , wherein laser power of the laser beam varies over time over the course of the welding process, the laser power being increased over time.

9. The method as recited in claim 1 , wherein prior to movement of the laser beam relative to the two components, the laser beam acts in a stationary manner for a certain period on the two components at a beginning of the welding process.

10. The method as recited in claim 1 , wherein a relative speed between the laser beam and the two components is varied during the welding process.

11. The method as recited in claim 1 , wherein a focus diameter of the laser beam is varied during the welding process.

12. The method as recited in claim 1 , wherein the laser weld seam is generated by pulsed spot welds, which partially overlap.

13. The method as recited in claim 1 , wherein the laser weld seam includes a plurality of independent seam sections that extend in different direction and that overlap one another at at least in one point.

14. The method as recited in claim 1 , wherein the laser weld seam is one of a plurality of partial weld seams situated along the line, a spacing being formed between two adjacent ones of the partial weld seams.

15. The method as recited in claim 1 , wherein prior to formation of the laser weld seam, spot welds are generated beforehand in an area of the laser weld seam to be formed.

16. A component composite, the component composite manufactured by connecting two components using a laser weld seam by:
situating the two components one above the other in a joining area;
applying a clamping force to a point of a first component of the two components in a direction of a second component of the two components by impacting the point of the first component with an object surface; and
generating a laser weld seam by impacting a laser beam on the first component on a side facing away from the second component to at least indirectly fuse material of the two components;
wherein:
the first component has a thickness in a joining area between 5 μm and 500 μm;
the impacting of the laser beam begins at the point at which the clamping force is applied and the impacting of the laser beam continues in a line away from the point at which the clamping force is applied, without the clamping force being externally applied along the line other than at the point;
the impacting of the laser beam continuing in the line is effected by the laser beam being moved relative to the two components and
the first component is a conductor support in the form of a flex foil or a battery layer and the second component is a substrate or a battery foil.

Assignees

• Bosch Gmbh Robert

Inventors

• Heider Andreas
• Ramsayer Reiner

Classifications

• B23K37/0435

  Clamps · CPC title

• B23K2103/12

  Copper or alloys thereof · CPC title

• B23K26/037

  by pressing on the workpiece, e.g. using a pressing roller foot · CPC title

• B23K26/0869

  Devices involving movement of the laser head in at least one axial direction · CPC title

• B23K2101/36

  Electric or electronic devices · CPC title