Non-aqueous electrolyte secondary battery

Pending Publication Date: 2022-03-17
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

[0010]With such a configuration, a thermal capacity of the end portion of the electrode body can be increased, and as a result, the high rate resistance of the non-aqueous electrolyte secondary battery can be improved.
[0011]The resin portion may be formed along the corresponding mixture layer. With such a configuration, the thermal capacity of the end portion of the electrode body can be more uniformly improved, and the effect of the technique disclosed herein can be exhibited at a higher level.
[0012]A thermal capacity of the resin portion may be 10 J/(kg·K) or more per unit weight (kg) of the corresponding mixture layer. With such a configuration, the thermal capacity of the end portion of the electrode body can be suitably increased, and the high rate resistance of the non-aqueous el

Problems solved by technology

By suppressing the temperature rise of the center portion of the wound electrode body, the amount of the non-aqueous electrolyte held in

Method used

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  • Non-aqueous electrolyte secondary battery
  • Non-aqueous electrolyte secondary battery
  • Non-aqueous electrolyte secondary battery

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0065]The positive electrode that has the positive electrode mixture layer was manufactured by applying the positive electrode mixture paste to the aluminum foil and drying the applied paste.

[0066]The negative electrode that has the negative electrode mixture layer was manufactured by applying the negative electrode mixture paste to the copper foil and drying the applied paste.

example 2

[0067]The positive electrode having the positive electrode mixture layer was manufactured by applying the positive electrode mixture paste to the aluminum foil and drying the applied paste.

[0068]The negative electrode that has the negative electrode mixture layer and the negative electrode side resin portion was manufactured by applying the negative electrode mixture paste and the PVP solution to the copper foil and drying the applied paste. The PVP solution was applied such that the thermal capacity of the negative electrode side resin portion was 5 J / (kg·K) per unit weight (kg) of the negative electrode mixture layer.

examples 3 to 8

[0069]The positive electrode and the negative electrode were manufactured in the same manner as in Example 2 except that the PVP solution was applied such that the thermal capacity of the negative electrode side resin portion was the value shown in Table 1.

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Abstract

A non-aqueous electrolyte secondary battery, in which a positive electrode includes a positive electrode mixture layer in which a mixture containing a positive electrode active material is formed and a positive electrode mixture layer non-forming portion in which the positive electrode mixture layer is not formed, and a negative electrode includes a negative electrode mixture layer in which a mixture containing a negative electrode active material is formed and a negative electrode mixture layer non-forming portion in which the negative electrode mixture layer is not formed. At least one of the positive electrode mixture layer non-forming portion and the negative electrode mixture layer non-forming portion has a resin portion substantially formed of a swellable resin having a property of swelling the non-aqueous electrolyte.

Description

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Claims

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Application Information

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Owner TOYOTA JIDOSHA KK
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