POSITIONING MEMBER, WINDING DEVICE FOR ELECTRODE ASSEMBLY AND BATTERY MANUFACTURING DEVICE

1 . A positioning member, wherein the positioning member is used for being inserted into a first groove on an outer peripheral surface of a winding pin, which is used for winding an electrode sheet and a separator; and

the positioning member is provided with a second groove, which is configured for a clamping pin to insert so as to position relative positions of the first groove and the clamping pin.

2 . The positioning member according to claim 1 , wherein the positioning member comprises two centering measuring tools, which are respectively placed in the two first grooves of the same winding pin, the centering measuring tool is provided with the second groove, and the two second grooves are arranged symmetrically with respect to an axis of the winding pin.

3 . The positioning member according to claim 2 , wherein the centering measuring tool has a first surface arranged toward the winding pin, and the shape of the first surface matches that of an inner wall of the first groove so as to attach the first surface to the winding pin.

4 . The positioning member according to claim 2 , wherein the shape of the second groove matches the shape of the clamping pin.

5 . The positioning member according to claim 2 , wherein the centering measuring tool is made of a metal material, and the Vickers hardness of the metal material is greater than or equal to 200 HV.

6 . The positioning member according to claim 2 , wherein the extension length of the centering measuring tool in the axial direction of the winding pin is H, and 100 mm≤H≤150 mm.

7 . The positioning member according to claim 2 , wherein the centering measuring tool comprises:

a filling portion arranged in the first groove;

a guide portion protruding out of the filling portion along a surface of the filling portion away from the winding pin, wherein there are two guide portions, which are arranged parallel to each other;

wherein the filling portion and the two guide portions jointly enclose to form the second groove.

8 . The positioning member according to claim 7 , wherein the minimum distance between the two guide portions is H 1 , and the thickness of the clamping pin is D 1 , wherein 0.08 mm≤H 1 −D 1 ≤0.15 mm.

9 . The positioning member according to claim 2 , wherein a surface of the centering measuring tool is provided with a thickness identification, and the thickness identification used for matching the centering measuring tool with winding pins having first grooves of different shapes and clamping pins of different thicknesses.

10 . A winding device for an electrode assembly, comprising:

the positioning member according to claim 1 ,

a winding pin, having a first groove arranged on an outer peripheral surface thereof, wherein the winding pin is used for winding an electrode sheet and a separator; and

a clamping pin, configured to be inserted into the second groove of the positioning member;

wherein the positioning member is used for positioning relative positions of the clamping pin and the winding pin.

11 . The winding device for an electrode assembly according to claim 10 , wherein there are two clamping pins, the outer circumference of the winding pin is provided with two first grooves, the two clamping pins are each used for being arranged in the two first grooves, the two clamping pins are arranged parallel to each other, and the clamping pins are capable of moving in a direction perpendicular to an axis of the winding pin.

12 . A battery manufacturing device, comprising the positioning member according to claim 1 .

13 . A battery manufacturing device, comprising the winding device for an electrode assembly according to claim 10 .