Production method for electric device assembly and electric device assembly

Abstract

Cell-to-cell connection plates (1) each integrally having a welding part (2) shaped to fall within a circular end of a battery case (7) and a connecting part (2) extending from this welding part (2) are provided. The cell-to-cell connection plates (1) are attached to one electrode terminal and the other electrode terminal of the battery case (7) by welding the welding parts (2), respectively. The connecting parts (3) of the respective cell-to-cell connection plates (1) attached to each adjoining pair of cylindrical batteries (Ba) are overlapped with each other and coupled into electric connection. Consequently, regardless of whether a plurality of cylindrical batteries (Ba) are axially arranged in series or radially juxtaposed, each adjoining two can be connected to each other by using the identical cell-to-cell connection plates (1) for cost reduction. It is also possible to provide a sufficient heat dissipation effect and achieve sufficient robustness and weight saving even when connecting large-sized cylindrical batteries.

Description

technical field [0001] The present invention relates to an inter-battery connection structure for constituting a battery module or a battery pack mainly by connecting a plurality of cylindrical batteries in series or in parallel to obtain a desired output voltage. Background technique [0002] In recent years, the portability and wirelessization of electronic equipment such as AV equipment, personal computers, and portable communication equipment have developed rapidly. As the driving power supply for these electrical equipment, nickel-cadmium batteries or nickel-metal hydride batteries are used because of their high reliability and easy maintenance. , lithium secondary batteries, etc. On the other hand, lead storage batteries are currently the mainstream in applications such as back-up emergency power supplies in the event of power outages caused by disasters such as earthquakes and typhoons, but in the future it is expected to use nickel metal hydride storage batteries wit...

AI Technical Summary

Problems solved by technology

[0010] As described above, in the conventional inter-battery connection structure, two types of connecting members of different shapes corresponding to the series arrangement in the battery axis direction and the parallel arrangement in the radial direction are required, so when configuring a battery module or a battery pack In this case, two types of connecting parts are required, and the cost of parts including metal molds increases accordingly, and the manufacturing cost becomes higher, so the manufactured battery module or battery pack becomes expensive.

In addition, in any connection structure between batteries, two adjacent batteries are connected by welding of connecting members. Therefore, when some batteries are found to be consumed or deteriorated during maintenance of the battery module, it is necessary to Replacing the battery module as a whole will increase the operating cost

[0011] Therefore, it is expected that a large cylindrical battery such as a nickel metal hydride battery with a large capacity of about 100Ah and a weight of about 1.6Kg will be put into practical use in the near future. When such a large cylindrical battery constitutes a battery module or a battery pack, the structure of the connecting structure between these batteries is relatively complicated, and the welding process becomes difficult along with it, and the weight of the connecting parts increases, which makes it difficult to fully It is difficult to foresee the practical application because it ensures the strength under impact.

Images