Secondary battery protecting module and lead mounting method
a technology for protecting modules and secondary batteries, which is applied in the direction of cell components, final product manufacturing, sustainable manufacturing/processing, etc., can solve the problems of easy damage to lithium ion batteries by overdischarge and overcharge, cracks may occur in solder, and it is difficult to completely avoid cracks in solder. to avoid the occurrence of cracks in the soldering portion
Inactive Publication Date: 2006-09-28
MITSUMI ELECTRIC CO LTD
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- Abstract
- Description
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- Application Information
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Benefits of technology
[0014] It is therefore an object of this invention to provide a lead mounting method capable of completely avoiding occurrence of a crack in a soldering portion.
[0031] In this invention, the flat lead is preliminarily formed into an L shape and thereafter mounted onto the principal surface of the printed board by soldering. It is therefore possible to completely avoid occurrence of a crack in a soldering portion.
Problems solved by technology
Among various secondary batteries, in particular, a lithium ion battery is easily damaged by overdischarge and overcharge.
In the above-mentioned lead mounting method, when the flat lead is bent by 90°, a crack may be caused to occur in the solder 52.
As a result, it is difficult to completely avoid occurrence of the crack in the solder 52.
Method used
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Embodiment Construction
[0035] Now, an embodiment of this invention will be described in detail with reference to the drawing.
[0036] Referring to FIGS. 2A to 2D, description will be made of a secondary battery protection module 10 to which a lead mounting method according to the embodiment of this invention is applicable.
[0037] As will later be described, the secondary battery protection module 10 is electrically connected to a secondary battery (not shown) such as a lithium ion battery. The secondary battery has an anode terminal and a cathode terminal. A combination of the secondary battery protection module 10 and the secondary battery is called a battery pack.
[0038] The secondary battery protection module 10 comprises a printed board 11. The printed board 11 has a principal surface 11a and a back surface 11b opposite to each other. The printed board 11 illustrated in the figure has a thickness of about 0.7 mm.
[0039] On the principal surface 11a of the printed board 11, a secondary battery protectio...
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Abstract
In a lead mounting method of mounting, onto a principal surface of a printed board, a lead to be connected to a terminal, a flat lead is prepared which lead has a mounted part to be disposed on the principal surface of the printed board and a connected part to be connected to the terminal. The flat lead is bent into an L shape so that the mounted part and the connected part are perpendicular to each other to obtain an L-shaped lead. The mounted part of the L-shaped lead is connected and fixed onto the principal surface of the printed board by soldering.
Description
[0001] This application claims priority to prior Japanese patent application JP 2005-90691, the disclosure of which is incorporated herein by reference. BACKGROUND OF THE INVENTION [0002] This invention relates to a secondary battery protecting module having a protection circuit for protecting a chargeable battery (secondary battery) such as a lithium ion battery and, in particular, to a method of mounting a lead to be connected to a terminal, such as a terminal of a secondary battery, to a printed board. [0003] Among various secondary batteries, in particular, a lithium ion battery is easily damaged by overdischarge and overcharge. It is therefore essential and indispensable to provide a secondary battery protection circuit for detecting an overdisharged state and an overcharged state of the lithium ion battery as a secondary battery to protect the secondary battery from the overdischarged state and the overcharged state. The secondary battery protection circuit comprises an overdi...
Claims
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Patent Timeline
Login to View More IPC IPC(8): H05K7/00H05K3/00H01M50/202H01M50/284H01M50/296
CPCH01M2/1022H01M10/052Y10T29/49124H05K2201/10818Y10T29/49149H05K3/3426Y02P70/50Y02E60/10H01M50/284H01M50/202H01M50/296
Inventor TAKEDA, ITARUKATO, TOMOYUKISHOJI, YASUO
Owner MITSUMI ELECTRIC CO LTD