Laser processing method and laser processing device and sealed type battery
A laser processing method and laser processing technology, applied in metal processing, laser welding equipment, battery pack components and other directions, can solve problems such as reduced bonding strength
Pending Publication Date: 2022-02-18
PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD
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Problems solved by technology
However, since the width of the fusion portion 13 at the boundary between the current collecting tab 12 and the battery external can 5, that is, the joint width becomes narrow, the joint strength between the current collecting tab 12 and the battery external can 5 decreases.
Method used
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Embodiment Construction
[0083] (the process of this disclosure)
[0084] In the case of using the conventional wire welding in the manufacturing method of the sealed battery (refer to Patent Document 2), the bonding strength between the battery outer can and the collector tab after welding does not satisfy the target value (the battery outer can does not appear The value of the joint strength at which the joint with the collector tab falls off).
[0085] Specifically, in the case of dropping a sealed battery manufactured by conventional laser welding and a sealed battery assembly (a battery pack composed of a plurality of sealed batteries), the battery does not satisfy the normal state (for example, a battery using The state in which the device can perform normal functions). If the battery is dropped under given conditions in various drop tests, the battery outer can and collector tabs will fall off. In order to prevent such peeling off, it is desirable to increase the joint strength compared to th...
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The invention relates to a laser processing method, a laser processing device and a sealed type battery. Provided is the laser processing method including the steps of overlapping a plurality of plate-shaped members that include a first plate-shaped member disposed on one end side of an overlapping direction and a second plate-shaped member disposed on the other end side of the overlapping direction; branching a laser beam into a first branched laser beam and a second branched laser beam; irradiating the first plate-shaped member with the first branched laser beam and the second branched laser beam in a state where the first branched laser beam and the second branched laser beam are emitted in parallel; forming line-shaped melting portions on the first plate-shaped member by moving the branched laser beams in a direction intersecting a direction in which the branched laser beams are aligned; and joining overlapped plate-shaped members in a state where the melting portion formed by using the first branched laser beam and the melting portion formed by using the second branched laser beam are connected to each other in the second plate-shaped member and the melting portions do not penetrate the second plate-shaped member.
Description
technical field [0001] The present disclosure relates to a laser processing method, a laser processing device, and a sealed battery. Background technique [0002] Conventionally, various methods have been known as laser processing methods. For example, as a laser processing method for welding a plurality of plate-shaped members to each other, lap laser welding such as spot welding for welding at one point, wire welding for continuous welding in a straight line or a curved line, or the like is known. [0003] Also, these laser weldings are used, for example, in the manufacture of sealed batteries. In the manufacture of a recent sealed battery, a laser beam is irradiated from the outside of the battery outer can, and laser welding is performed on the battery outer can and the collector tabs derived from the electrodes of the battery by laser irradiation to form a fusion zone (for example, refer to the patent document 1 and 2). The sealed battery thus produced is used in ele...
Claims
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IPC IPC(8): B23K26/21B23K26/06B23K26/70H01M50/566
CPCB23K26/21B23K26/06B23K26/702H01M50/566B23K2101/36B23K26/067B23K26/083B23K26/244B23K26/32B23K2101/34B23K2103/12G02B27/106G02B27/4233H01M50/536Y02E60/10Y02P70/50B23K26/0006B23K26/0652B23K26/0676
Inventor 船见浩司
Owner PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO LTD