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US 2026/0094860 A1Published application
Battery cell and electrical device
AssigneeXiamen Ampace Technology Limited
InventorsXiao SHI, Songyang SU, Xinyu ZHENG, Juan JIN
Life of this patent
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Abstract
An electrode assembly of the battery cell is of a jelly-roll structure, the electrode assembly includes a negative electrode plate; along a winding direction of the electrode assembly, an elongation at break of the negative electrode plate is X0; along an extension direction of a winding axis of the electrode assembly, an elongation of the negative electrode plate is X1; and along a thickness direction of the electrode assembly, an expansion rate of the electrode assembly is X2, 0≤X0−(X1+X2)≤2%.
Claims20
A battery cell, comprising:
- a shell;
- and
- an electrode assembly, accommodated in the shell;
- wherein the electrode assembly is of a jelly-roll structure, the electrode assembly comprises a negative electrode plate;
- along a winding direction of the electrode assembly, an elongation at break of the negative electrode plate is X0;
- along an extension direction of a winding axis of the electrode assembly, an elongation of the negative electrode plate is X1;
- and along a thickness direction of the electrode assembly, an expansion rate of the electrode assembly is X2;
- 0≤X0−(X1+X2)≤2%;
- wherein when the battery cell is in a fully charged state, a length of the negative electrode plate along the extension direction of the winding axis of the electrode assembly is X11, and a dimension of the electrode assembly along the thickness direction of the electrode assembly is X21;
- and. when the battery cell is in a fully discharged state, a length of the negative electrode plate along the extension direction of the winding axis of the electrode assembly is X12, a dimension of the electrode assembly along the thickness direction of the electrode assembly is X22, a dimension of the electrode assembly along a width direction of the electrode assembly is b, X1=(X11−X12)/X12, X2=(X21−X22)/b;
- and the extension direction of the winding axis of the electrode assembly, the thickness direction of the electrode assembly, and the width direction of the electrode assembly are perpendicular to each other.
8 more elements
An electrical device, comprising a battery cell, the battery cell comprising:
- a shell;
- and
- an electrode assembly, accommodated in the shell, wherein the electrode assembly is of a jelly-roll structure, the electrode assembly comprises a negative electrode plate;
- along a winding direction of the electrode assembly, an elongation at break of the negative electrode plate is X0;
- along an extension direction of a winding axis of the electrode assembly, an elongation of the negative electrode plate is X1;
- and along a thickness direction of the electrode assembly, an expansion rate of the electrode assembly is X2;
- 0≤X0−(X1+X2)≤2%;
- wherein when the battery cell is in a fully charged state, a length of the negative electrode plate along the extension direction of the winding axis of the electrode assembly is X11, and a dimension of the electrode assembly along the thickness direction of the electrode assembly is X21;
- and. when the battery cell is in a fully discharged state, a length of the negative electrode plate along the extension direction of the winding axis of the electrode assembly is X12, a dimension of the electrode assembly along the thickness direction of the electrode assembly is X22, a dimension of the electrode assembly along a width direction of the electrode assembly is b, X1=(X11−X12)/X12, X2=(X21−X22)/b;
- and the extension direction of the winding axis of the electrode assembly, the thickness direction of the electrode assembly, and the width direction of the electrode assembly are perpendicular to each other.
7 more elements
Dependencies are inferred from the claim text.