Battery and method for the manufacture of such a battery
First Claim
1. A battery comprising, in a battery housing:
- positive electrodes and negative electrodes, which are disposed with intervening separators,a solid electrolyte or an electrolyte solution,a safety valve, anda member whose shape is altered;
wherein said member has a shape that is altered at a predetermined first temperature which is a lower temperature than a melting point of said separators;
said member retains said altered shape at temperatures which fall within an operating temperature range of said battery;
said member can be heated to said first temperature to exert pressure in at least one area within said battery housing or can be cooled to release said exerted pressure; and
wherein, when said shape of said member is altered, said safety valve in said battery housing is actuated.
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Accused Products
Abstract
The object of the present invention is to provide a secondary battery that has a lamination of negative electrodes and positive electrodes with intervening separators that acquires a low battery internal impedance and excellent charging and discharging power by the sufficient compressing of the electrodes, and that is very safe and easy to recycle, and to provide a method for manufacturing such a battery. To achieve the above object, according to the present invention, in a battery wherein positive electrodes and negative electrodes are disposed with intervening separators, and are stored in a battery housing with a solid electrolyte or an electrolyte solution, provided in the battery housing is a member whose shape is changed at a predetermined temperature (first temperature), which is lower than the melting point of the separator that maintains the shape in the battery operating temperature range. By heating or cooling the member to the first temperature, pressure is applied to at least one part of the battery housing or the applied pressure is released.
108 Citations
52 Claims
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1. A battery comprising, in a battery housing:
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positive electrodes and negative electrodes, which are disposed with intervening separators, a solid electrolyte or an electrolyte solution, a safety valve, and a member whose shape is altered; wherein said member has a shape that is altered at a predetermined first temperature which is a lower temperature than a melting point of said separators; said member retains said altered shape at temperatures which fall within an operating temperature range of said battery; said member can be heated to said first temperature to exert pressure in at least one area within said battery housing or can be cooled to release said exerted pressure; and wherein, when said shape of said member is altered, said safety valve in said battery housing is actuated. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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25. A method for manufacturing a battery, wherein positive electrodes and negative electrodes are disposed with intervening separators and such a resultant structure is stored in a battery housing, along with a solid electrolyte or an electrolyte solution, comprising the steps of:
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storing, in said battery housing, at least said positive electrodes, said negative electrodes, said separators, and a member whose shape is altered at a temperature (a first temperature) that is lower than a melting point of said separators and that retains said altered shape at temperatures that fall within said operating temperature range; and heating or cooling a resultant structure at said first temperature that differs from a temperature that exists at such time as storing is accomplished. - View Dependent Claims (26, 27, 28)
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29. A battery comprising, in a battery housing:
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positive electrodes and negative electrodes, which are disposed with intervening separators, a solid electrolyte or an electrolyte solution, and a member whose shape is capable of being altered; wherein said member has a shape that is altered at a predetermined first temperature which is a lower temperature than a melting point of said separators; said member retains said altered shape at temperatures which fall within an operating temperature range of said battery; said member can be heated to said first temperature to exert pressure in at least one area within said battery housing, and wherein, when said shape of said member is altered, said electrodes are compressed in a direction that is perpendicular to the faces of said electrodes. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52)
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Specification