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Electric core and battery with the electric core

A technology of batteries and electrolytes, applied in the field of electrochemistry, can solve problems such as safety performance degradation and user risks, and achieve the effect of improving mechanical strength and safety performance

Active Publication Date: 2022-02-22
NINGDE AMPEREX TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous improvement of energy density and operating voltage, the safety performance of the battery core will gradually decline under the condition of mechanical external force (such as: high-speed impact, heavy object extrusion, falling, etc.), which makes users at risk during use

Method used

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  • Electric core and battery with the electric core
  • Electric core and battery with the electric core
  • Electric core and battery with the electric core

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0069] refer to figure 1 , the battery cell 10 includes an electrode assembly 11 , a packaging bag 12 for accommodating the electrode assembly 11 , an electrolyte 13 , a first tab 14 and a second tab 15 . The electrolyte solution 13 is accommodated in the packaging bag 12 . The electrolytic solution 13 includes lithium salt.

[0070] The electrode assembly 11 is formed by sequentially winding an anode pole piece 111 , a separator 112 and a cathode pole piece 113 . The first tab 14 is connected to the anode pole piece 111 and extends out of the packaging bag 12 . The second tab 15 is connected to the cathode sheet 113 and extends out of the packaging bag 12 . Wherein, the anode sheet 111 includes a first current collector 1111 and a first active material layer 1112 disposed on the first current collector 1111 .

[0071] In this embodiment, the thickness T of the battery cell 10 is 3.3 mm. The number L of layers of the electrode assembly 11 is 11 layers. The stiffness G of...

Embodiment 2

[0081] The difference between Embodiment 2 and Embodiment 1 is that the thickness T of the cell 10 in Embodiment 2 is 4.5 mm, the number of layers L of the electrode assembly 11 is 13 layers, and the stiffness G of the cell 10 in the width direction is is 95 N / mm, and the concentration c of the lithium salt is 1.0 mol / L. The thickness a of the first current collector 1111 is 0.006mm. In Embodiment 2, the thickness a of the first current collector 1111 also satisfies the above formula.

Embodiment 3

[0083] The difference between embodiment 3 and embodiment 2 is that the stiffness G of the cell 10 in the width direction in embodiment 3 is 168 N / mm, the concentration c of the lithium salt is 1.8 mol / L, and the first current collector 1111 The thickness a is 0.012mm. In Embodiment 3, the thickness a of the first current collector 1111 also satisfies the above formula.

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Abstract

An electric cell (10) and a battery having the electric cell (10). The battery cell (10) includes an electrode assembly (11), a packaging bag (12) for accommodating the electrode assembly (11), and an electrolyte solution (13). The electrolyte (13) is contained in the packaging bag (12). The electrode assembly (11) is formed by sequentially winding or stacking a cathode electrode sheet (113), a separator (112) and an anode electrode sheet (111). The anode sheet (111) includes a first current collector (1111) and a first active material layer (1112) disposed on the first current collector (1111). The electrolyte (13) includes lithium salts. The thickness a of the anode current collector (1111) satisfies the following formula: 0.02T / (L+5)×c≤a≤(0.3L 2 ) / (GT 2 ). Wherein, T is the thickness of the battery cell (10), c is the concentration of the lithium salt, G is the stiffness of the battery core (10) in the width direction, and L is the layer of the electrode assembly (11). number. The battery core (10) has high mechanical strength.

Description

technical field [0001] The present application relates to the field of electrochemistry, in particular to an electric core and a battery with the electric core. Background technique [0002] With the continuous improvement of energy density and operating voltage, the safety performance of the battery will gradually decrease under the condition of external mechanical force (such as: high-speed impact, heavy object extrusion, drop, etc.), which makes users at risk during use. Contents of the invention [0003] In view of this, it is necessary to provide a battery cell with high mechanical strength to improve its safety performance. [0004] An embodiment of the present application provides a battery cell, which includes an electrode assembly, a packaging bag for containing the electrode assembly, and an electrolyte, the electrolyte is contained in the packaging bag, and the electrode assembly passes through the cathode sheet , a separator, and an anode sheet are wound or st...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M4/72H01M10/0587H01M10/0585H01M10/04H01M10/0568
CPCH01M4/72H01M10/0587H01M10/0585H01M10/0431H01M10/0568Y02E60/10Y02P70/50H01M4/70H01M10/0525
Inventor 闫东阳
Owner NINGDE AMPEREX TECH