Secondary battery and battery pack
A technology for secondary batteries and battery packs, used in secondary batteries, secondary battery manufacturing, small-sized batteries/battery packs, etc., can solve problems such as reduced bonding strength and electrical conductivity
Pending Publication Date: 2022-07-29
PRIME PLANET ENERGY & SOLUTIONS INC
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- Abstract
- Description
- Claims
- Application Information
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Problems solved by technology
If the large amount of heat during heat welding is conducted to the joint (metal joint) formed by intermetallic bonding, the metal joint may be thermally degraded and the joint strength, electrical conductivity, etc. may be reduced.
Method used
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[0031] Hereinafter, one embodiment of the technology disclosed herein will be described. In addition, the following embodiments are not intended to limit the technology disclosed herein. In addition, matters other than the matters specifically mentioned in this specification and matters necessary for implementation of the technology disclosed herein can be grasped as design matters by those skilled in the art based on the prior art in the field. That is, the technique disclosed here can be implemented based on the content disclosed in this specification and technical common sense in this field.
[0032] In addition, in the drawings referred to in the following description, the same reference numerals are attached to the members and parts having the same functions. In addition, the dimensional relationship (length, width, thickness, etc.) in each drawing does not reflect the actual dimensional relationship. In addition, the reference numeral X in each drawing represents the "...
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Abstract
The invention relates to a secondary battery and a battery pack. Thermal degradation of a metal joint part formed at a contact interface of a structural member of an electrode terminal is suppressed. An electrode terminal (20) of a secondary battery is provided with: a first member (30) having a plate-shaped connection part (34); and a plate-shaped second member (40) connected to the connection portion (34) of the first member (30) in a surface contact manner. Furthermore, in the technology disclosed herein, a metal bonding part (70) and a heat-insulating part (80) are formed at the contact interface between the connecting part (34) of the first member (30) and the second member (40), and the heat-insulating part (80) is formed further outward than the metal bonding part (70) in the radial direction centered on the metal bonding part (70). As a result, even if a large amount of heat is applied to a region outside the heat-insulating section (80), the large amount of heat can be blocked by the heat-insulating section (80), and thermal degradation of the metal bonding section (70) can be suppressed.
Description
technical field [0001] The present invention relates to a secondary battery including electrode terminals and an assembled battery including a plurality of secondary batteries. Background technique [0002] Currently, secondary batteries such as lithium-ion secondary batteries and nickel-metal hydride batteries are widely used in various fields including vehicles, mobile terminals, and the like. This secondary battery generally includes an electrode body as a power generating element, and a battery case in which the electrode body is accommodated. In addition, in this secondary battery, the electrode terminal connected to the electrode body inside the battery case is drawn out to the outside of the case. Furthermore, the electrode terminals drawn out of the case are connected to external devices, other batteries, and the like via external connection members such as bus bars. [0003] As an example of the prior art related to the above-mentioned electrode terminal, the stru...
Claims
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IPC IPC(8): H01M10/04H01M10/0525H01M50/502H01M50/507H01M50/536H01M50/543
CPCH01M50/543H01M50/536H01M50/502H01M50/507H01M10/04H01M10/0525H01M50/176H01M50/516H01M50/553H01M50/566H01M50/562Y02E60/10H01M10/658H01M10/6553H01M10/653H01M50/505H01M50/103H01M50/15
Inventor 樱井贵宏铃木康介
Owner PRIME PLANET ENERGY & SOLUTIONS INC