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Method for connecting two battery poles made of different materials of two battery cells and battery cell

A technology of battery cells and battery cells, which is applied to electrical components, battery pack components, high-frequency current welding equipment, etc., and can solve problems such as high additional costs, difficult control of processing technology, and difficult manufacturing of welding connections

Active Publication Date: 2018-01-19
ROBERT BOSCH GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The following problem arises when connecting battery poles of different poles: in particular a battery pole made of copper must be connected to a battery pole made of aluminum
However, the method known from said document has the problem that the welding of battery poles made of different materials is relatively difficult to control in terms of processing technology due to intermetallic phases in the welding region of the two poles
All in all, this means that a welded connection between two battery poles made of different materials is difficult to produce and requires relatively high additional expenditure to protect the connection point from external influences, in particular from corrosion

Method used

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  • Method for connecting two battery poles made of different materials of two battery cells and battery cell
  • Method for connecting two battery poles made of different materials of two battery cells and battery cell
  • Method for connecting two battery poles made of different materials of two battery cells and battery cell

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Embodiment Construction

[0018] exist figure 1 A battery unit 100 is shown in a greatly simplified manner, which consists of a large number of interconnected battery cells 10 . exist figure 1 In the diagram, only six battery cells 10 connected to each other are shown for the sake of simplification, however, in practice, such a battery cell 100 may also consist of more than six battery cells 10 . Such a battery unit 100 is preferably, but not exclusively, used in a motor vehicle, in particular as a component of a hybrid drive. Furthermore, the battery cells 10 are in particular lithium-ion battery cells 10 each having a positive electrode 1 and a negative electrode 2 . In the illustrated embodiment, all six battery cells 10 are electrically connected in series such that the individual battery voltages of these battery cells sum. It is of course also within the scope of the invention that the battery cells 10 are at least partially electrically connected in parallel.

[0019] A special feature of th...

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Abstract

The invention relates to a method for connecting two battery poles ( 1 , 2 ) made of different materials of two battery cells ( 10 ) by means of a material fit and / or force fit and / or form fit connection. According to the invention it is provided that the two battery poles ( 1 , 2 ) are connected to one another in the connection region ( 11 ) by means of an electromagnetic pulse method, in particular by means of a magnetic pulse welding connection.

Description

technical field [0001] The invention relates to a method according to the preamble of claim 1 for connecting two battery poles of two battery cells made of different materials. Furthermore, the invention relates to a battery unit with interconnected battery cells according to the preamble of claim 3 . Background technique [0002] Such a method or such a battery cell is known from DE 10 2009 046 505 A1. In this known method or its battery cell, it is provided that the poles of the first battery cell and the poles of the second battery cell are directly connected to one another by means of a material-fit, force-fit or form-fit connection. In this case, the two poles of the two battery cells consist of different materials, in particular copper and aluminum. As a connection method, a welding method and a riveting method are suggested, or alternatively, two battery poles are suggested to be screwed together. [0003] Depending on the structure, lithium-ion batteries have batt...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M2/20H01M50/516
CPCH01M50/516Y02E60/10B23K13/01
Inventor R.拉姆赛尔
Owner ROBERT BOSCH GMBH
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