Electrode assembly
An electrode assembly is provided in the disclosure. The electrode assembly includes a positive electrode and a negative electrode. The positive electrode includes a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer. The negative electrode includes a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer.
1 . An electrode assembly, comprising a positive electrode and a negative electrode, wherein:
the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer;
the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer;
the positive electrode and the negative electrode which are adjacent to each other are separated by a separator;
a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab;
a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab;
the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly;
the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and
the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
2 . The electrode assembly of claim 1 , wherein the first tab, the second tab, the third tab, and the fourth tab are arranged at a same side in the height direction of the electrode assembly.
3 . The electrode assembly of claim 1 , wherein two of the first tab, the second tab, the third tab, and the fourth tab are arranged at one side of the electrode assembly in the height direction of the electrode assembly, and the other two of the first tab, the second tab, the third tab, and the fourth tab are arranged at the other side in the height direction of the electrode assembly.
4 . The electrode assembly of claim 2 , wherein:
the electrode assembly has a wound structure;
the first tab and the fourth tab are arranged at one side of the symmetry plane of the electrode assembly, and the second tab and the third tab are arranged at the other side of the symmetry plane; and
the first tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
5 . The electrode assembly of claim 3 , wherein;
the electrode assembly has a wound structure;
the first tab and the fourth tab are arranged at one side of the symmetry plane of the electrode assembly, and the second tab and the third tab are arranged at the other side of the symmetry plane; and
the first tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
6 . The electrode assembly of claim 2 , wherein:
the electrode assembly has a wound structure;
the second tab and the third tab are arranged at one side of the symmetry plane of the electrode assembly, and the first tab and the fourth tab are arranged at the other side of the symmetry plane; and
the fourth tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
7 . The electrode assembly of claim 3 , wherein:
the electrode assembly has a wound structure;
the second tab and the third tab are arranged at one side of the symmetry plane of the electrode assembly, and the first tab and the fourth tab are arranged at the other side of the symmetry plane; and
the fourth tab is disposed between the second tab and the third tab in the length direction of the electrode assembly.
8 . The electrode assembly of claim 2 , wherein:
the electrode assembly has a wound structure;
the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and
the third tab is disposed between the first tab and the second tab in the length direction of the electrode assembly.
9 . The electrode assembly of claim 3 , wherein:
the electrode assembly has a wound structure;
the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and
the third tab is disposed between the first tab and the second tab in the length direction of the electrode assembly.
10 . The electrode assembly of claim 2 , wherein:
the electrode assembly has a wound structure;
the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and
the first tab is disposed between the third tab and the second tab in the length direction of the electrode assembly.
11 . The electrode assembly of claim 3 , wherein;
the electrode assembly has a wound structure;
the first tab and the second tab are arranged at one side of the symmetry plane of the electrode assembly, and the third tab and the fourth tab are arranged at the other side of the symmetry plane; and
the first tab is disposed between the third tab and the second tab in the length direction of the electrode assembly.
12 . The electrode assembly of claim 2 , wherein:
the electrode assembly has a wound structure; and
the first tab, the second tab, the third lab, and the fourth lab are arranged at a same side of the symmetry plane of the electrode assembly.
13 . The electrode assembly of claim 3 , wherein:
the electrode assembly has a wound structure; and
the first tab, the second tab, the third lab, and the fourth lab are arranged at a same side of the symmetry plane of the electrode assembly.
14 . The electrode assembly of claim 1 , wherein:
the first active material layer is different from the second active material layer; and/or
the third active material layer is different from the fourth active material layer.
15 . A battery pack, comprising a battery box and a plurality of electrode assemblies received in the battery box, each of the plurality of electrode assemblies comprising a positive electrode and a negative electrode, wherein:
the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer;
the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer;
the positive electrode and the negative electrode which are adjacent to each other are separated by a separator;
a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab;
a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab;
the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly;
the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and
the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
16 . The battery pack of claim 15 , wherein the first tab, the second tab, the third tab, and the fourth tab are arranged at a same side in the height direction of the electrode assembly.
17 . The battery pack of claim 15 , wherein two of the first tab, the second tab, the third tab, and the fourth tab are arranged at one side of the electrode assembly in the height direction of the electrode assembly, and the other two of the first tab, the second tab, the third tab, and the fourth tab are arranged at the other side in the height direction of the electrode assembly.
18 . A vehicle, comprising a processor and a battery pack electrically coupled with the processor, the battery pack comprising a battery box and a plurality of electrode assemblies received in the battery box, the processor being configured to control charging and discharging of each of the plurality of electrode assemblies, and each of the plurality of electrode assemblies comprising a positive electrode and a negative electrode, wherein:
the positive electrode comprises a first insulating layer, a first conductive layer on one surface of the first insulating layer and a second conductive layer on the other surface of the first insulating layer, a first active material layer on a surface of the first conductive layer, and a second active material layer on a surface of the second conductive layer;
the negative electrode comprises a second insulating layer, a third conductive layer on one surface of the second insulating layer and a fourth conductive layer on the other surface of the second insulating layer, a third active material layer on a surface of the third conductive layer, and a fourth active material layer on a surface of the fourth conductive layer;
the positive electrode and the negative electrode which are adjacent to each other are separated by a separator;
a current in the first conductive layer of the positive electrode is outputted through a first tab, and a current in the second conductive layer of the positive electrode is outputted through a second tab;
a current in the third conductive layer of the negative electrode is outputted through a third tab, and a current in the fourth conductive layer of the negative electrode is outputted through a fourth tab;
the first tab and the second tab are staggered, wherein a part of the first conductive layer and a part of the first insulating layer extend beyond the second conductive layer to form the first tab in a height direction of the electrode assembly, and a part of the second conductive layer and a part of the first insulating layer extend beyond the first conductive layer to form the second tab in the height direction of the electrode assembly;
the third tab and the fourth tab are staggered, wherein a part of the third conductive layer and a part of the second insulating layer extend beyond the fourth conductive layer to form the third tab in the height direction of the electrode assembly, and a part of the fourth conductive layer and a part of the second insulating layer extend beyond the third conductive layer to form the fourth tab in the height direction of the electrode assembly; and
the electrode assembly has a symmetry plane that is parallel to the height direction and a length direction of the electrode assembly, an orthographic projection of the first tab on the symmetry plane, an orthographic projection of the second tab on the symmetry plane, an orthographic projection of the third tab on the symmetry plane, and an orthographic projection of the fourth tab on the symmetry plane are spaced apart from one another.
19 . The electrode assembly of claim 1 , wherein any two of the first tab, the second tab, the third tab, and the fourth tab are located on one side of the symmetry plane, and the remaining two of the first tab, the second tab, the third tab, and the fourth tab are located on the other side of the symmetry plane.
20 . The electrode assembly of claim 1 , wherein all of the first tab, the second tab, the third tab, and the fourth tab are located on a same side of the symmetry plane.