JP2020057504A5 - - Google Patents

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Publication number
JP2020057504A5
JP2020057504A5 JP2018186894A JP2018186894A JP2020057504A5 JP 2020057504 A5 JP2020057504 A5 JP 2020057504A5 JP 2018186894 A JP2018186894 A JP 2018186894A JP 2018186894 A JP2018186894 A JP 2018186894A JP 2020057504 A5 JP2020057504 A5 JP 2020057504A5
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JP
Japan
Prior art keywords
endothermic
secondary battery
endothermic member
temperature range
battery according
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Application number
JP2018186894A
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Japanese (ja)
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JP2020057504A (en
JP7168405B2 (en
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Priority to JP2018186894A priority Critical patent/JP7168405B2/en
Priority claimed from JP2018186894A external-priority patent/JP7168405B2/en
Publication of JP2020057504A publication Critical patent/JP2020057504A/en
Publication of JP2020057504A5 publication Critical patent/JP2020057504A5/ja
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Claims (5)

シャットダウン機能を有するセパレータを介して正極および負極が重ね合わされ軸芯の周りに捲回された電極体と、電解質と、を備えた二次電池であって、
前記軸芯は、
前記二次電池の発熱を吸熱する吸熱部材と、
前記二次電池の発熱によって膨張する熱膨張部材と、
を備えたことを特徴とする、二次電池。 A secondary battery including an electrode body in which a positive electrode and a negative electrode are overlapped with each other via a separator having a shutdown function and wound around an axis, and an electrolyte.
The shaft core is
An endothermic member that absorbs heat from the secondary battery,
A thermal expansion member that expands due to the heat generated by the secondary battery,
A secondary battery characterized by being equipped with. 前記吸熱部材は、第１吸熱部材と第２吸熱部材とを備えており、The endothermic member includes a first endothermic member and a second endothermic member.
前記第１吸熱部材が吸熱反応を生じる温度域には、前記セパレータのシャットダウン温度が含まれており、The temperature range in which the first endothermic member causes an endothermic reaction includes the shutdown temperature of the separator.
前記第２吸熱部材が吸熱反応を生じる温度域は、前記第１吸熱部材が吸熱反応を生じる温度域よりも高い温度域であることを特徴とする、請求項１に記載の二次電池。The secondary battery according to claim 1, wherein the temperature range in which the second endothermic member causes an endothermic reaction is a temperature range higher than the temperature range in which the first endothermic member causes an endothermic reaction. 前記第２吸熱部材は、前記第１吸熱部材よりも前記軸芯における内側に設けられていることを特徴とする、請求項２に記載の二次電池。The secondary battery according to claim 2, wherein the second endothermic member is provided inside the shaft core of the first endothermic member. 前記第１吸熱部材には、高密度ポリエチレンが使用され、High-density polyethylene is used for the first endothermic member.
前記第２吸熱部材には、ポリプロピレンおよびセルロースの少なくともいずれかが使用されていることを特徴とする、請求項２または３に記載の二次電池。The secondary battery according to claim 2 or 3, wherein at least one of polypropylene and cellulose is used for the second endothermic member. 前記熱膨張部材は前記吸熱部材よりも内側に設けられていることを特徴とする、請求項１〜４のいずれか一項に記載の二次電池。The secondary battery according to any one of claims 1 to 4, wherein the thermal expansion member is provided inside the heat absorbing member.
JP2018186894A 2018-10-01 2018-10-01 secondary battery Active JP7168405B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2018186894A JP7168405B2 (en) 2018-10-01 2018-10-01 secondary battery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2018186894A JP7168405B2 (en) 2018-10-01 2018-10-01 secondary battery

Publications (3)

Publication Number Publication Date
JP2020057504A JP2020057504A (en) 2020-04-09
JP2020057504A5 true JP2020057504A5 (en) 2021-07-26
JP7168405B2 JP7168405B2 (en) 2022-11-09

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ID=70107544

Family Applications (1)

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JP2018186894A Active JP7168405B2 (en) 2018-10-01 2018-10-01 secondary battery

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Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07192753A (en) * 1993-12-27 1995-07-28 Sanyo Electric Co Ltd Lithium secondary battery
JP2005259567A (en) 2004-03-12 2005-09-22 Matsushita Electric Ind Co Ltd Nonaqueous electrolyte secondary battery

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