Battery cell, battery, and electrical consuming device
In some embodiments, the battery cell includes a shell, including an opening; an electrode unit, accommodated in the shell, the electrode unit including a main body portion and a tab portion protruding from the main body portion; a cap assembly, for connecting with the shell, and covering and closing the opening; and a first insulating member, accommodated in the shell and adapted to isolate at least part of the main body portion from the shell, the first insulating member including a first insulating plate, and the first insulating plate being disposed on a side of the main body portion facing the cap assembly and being attached to the main body portion. The first insulating member can insulate at least part of the main body portion from the shell.
1. A battery cell, comprising:
a shell, comprising an opening;
an electrode unit, accommodated in the shell, the electrode unit comprising a main body portion and a tab portion protruding from a top surface of the main body portion;
a cap assembly, for connecting with the shell, and covering and closing the opening; and
a first insulating member, accommodated in the shell and adapted to isolate at least part of the main body portion from the shell, the first insulating member comprising a first insulating plate, and the first insulating plate being disposed on a side of the main body portion facing the cap assembly and being attached to the main body portion, wherein
the cap assembly comprises a cap, an electrode terminal, and a second insulating member, the cap being adapted to cover and close the opening, the electrode terminal being mounted on the cap, and the second insulating member extending along the top surface and being disposed between the cap and the main body portion of the electrode unit,
the second insulating member comprises a first concave portion on a side facing the main body portion, the first concave portion being configured to accommodate at least a part of the tab portion, and
at least part of the first insulating plate is attached to and sandwiched between the second insulating member and the main body portion.
2. The battery cell according to claim 1 , wherein the first insulating plate is attached to the top surface of the main body portion.
3. The battery cell according to claim 1 , wherein the first insulating plate comprises an insulating layer and a bonding layer, the bonding layer being disposed on a surface of the insulating layer facing the main body portion and bonded to the main body portion.
4. The battery cell according to claim 1 , wherein the first insulating member further comprises:
two second insulating plates, respectively disposed on two sides of the main body portion in a first direction;
two third insulating plates, respectively disposed on two sides of the main body portion in a second direction, wherein each third insulating plate connects the two second insulating plates;
wherein an end of the second insulating plate close to the cap assembly is connected with the first insulating plate, and/or an end of the third insulating plate close to the cap assembly is connected with the first insulating plate;
the first direction and the second direction are arranged to intersect with each other, and the first direction and the second direction are respectively perpendicular to a thickness direction of the cap assembly.
5. The battery cell according to claim 4 , wherein the third insulating plate comprises a first portion and a second portion, the first portion being provided integrally with one of the second insulating plates, and the second portion being provided integrally with the other one of the second insulating plates,
the first portion and the second portion at least partially overlap in the second direction, and are connected in an overlapping region; and/or the first portion and the second portion are both bonded to the main body portion.
6. The battery cell according to claim 4 , wherein the first insulating member further comprises a fourth insulating plate located on a side of the main body portion facing away from the first insulating plate and connecting the two second insulating plates, wherein the first insulating plate and the fourth insulating plate are arranged along a third direction, and the first direction, the second direction and the third direction intersect with each other.
7. The battery cell according to claim 6 , wherein the fourth insulating plate comprises a third portion and a fourth portion, the third portion being provided integrally with one of the second insulating plates, and the fourth portion being provided integrally with the other one of the second insulating plates;
the third portion and the fourth portion at least partially overlap in the third direction, and are connected in an overlapping region; and/or, the third portion and the fourth portion are both bonded to the main body portion.
8. The battery cell according to claim 1 , wherein,
the battery cell further comprises a current collecting member, the current collecting member being adapted to connect the electrode terminal with the tab portion;
the first concave portion of the second insulating member is configured to accommodate at least a part of the current collecting member.
9. The battery cell according to claim 8 , wherein the second insulating member is formed with a first convex portion on a side facing away from the main body portion at a position corresponding to the first concave portion, the cap is formed with a second concave portion on a side facing the main body portion, and the second concave portion is adapted to accommodate the first convex portion.
10. The battery cell according to claim 8 , wherein two surfaces of the first insulating plate are bonded to the second insulating member and the main body portion, respectively.
11. A battery comprises a case and the battery cell according to claim 1 , wherein the battery cell is accommodated in the case.
12. An electrical consuming device comprising the battery according to claim 11 , the battery is adapted to provide electrical energy.
13. The battery cell according to claim 1 , wherein the cap assembly further comprises a pressure relief valve mounted on the cap, the pressure relief valve is configured to release an internal pressure of the battery cell when the internal pressure of the battery cell reaches a predetermined value.