EP-4737053-A1 - END CAP WELDING DEVICE, BATTERY ASSEMBLING SYSTEM, ASSEMBLY METHOD, AND BATTERY CELL

EP4737053A1EP 4737053 A1EP4737053 A1EP 4737053A1EP-4737053-A1

Abstract

The present application provides an end cover welding apparatus (30) for a battery cell (100), an assembling method and a battery cell (100), in which, the battery cell (100) includes a case (101), and an end cover (102) which is arranged at one end of the case (101); a joint of the case (101) and the end cover (102) is provided with a first connecting seam and a second connecting seam which are arranged along a circumferential direction of the case (101); the end cover welding apparatus (30) includes a material conveying assembly (310) and a welding assembly (340), in which, the material conveying assembly (310) includes a conveying line (311), a first clamp (312) and a second clamp (313), and the first clamp (312) and the second clamp (313) are arranged at an interval on the same conveying line (311); the first clamp (312) is configured to fix the case (101) and make the first connecting seam visible; the second clamp (313) is configured to fix the case (101) and make the second connecting seam visible; and the welding assembly (340) is arranged along the conveying line (311) and is configured to weld the first connecting seam when the first clamp (312) with the battery cell (100) fixed is conveyed to the welding assembly (340), and is also configured to weld the second connecting seam when the second clamp (313) with the battery cell (100) fixed is conveyed to the welding assembly (340).

Inventors

WU, KAI
LIAN, SHIYUAN
PAN, Wensheng
CHEN, Jianyun
FAN, Xiang

Assignees

Contemporary Amperex Technology Co., Limited

Dates

Publication Date: 20260506
Application Date: 20240527

Claims (20)

An end cover welding apparatus, a battery cell comprising a case and an end cover arranged at one end of the case, a joint of the case and the end cover being provided with a first connecting seam and a second connecting seam which are arranged along a circumferential direction of the case, the end cover welding apparatus comprising: a material conveying assembly comprising a conveying line, a first clamp and a second clamp, and the first clamp and the second clamp being arranged at an interval on the same conveying line, wherein the first clamp is configured to fix the case and expose the first connecting seam, and the second clamp is configured to fix the case and expose the second connecting seam; and a welding assembly which is arranged along the conveying line and is configured to weld the first connecting seam when the first clamp with the battery cell fixed is conveyed to the welding assembly, and is also configured to weld the second connecting seam when the second clamp with the battery cell fixed is conveyed to the welding assembly.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a steering assembly which is spaced from the welding assembly along the conveying line, the conveying line is configured to convey the first clamp and the second clamp to the steering assembly from the welding assembly, and then to convey to the welding assembly; the steering assembly is configured to take out the battery cell with the first connecting seam welded from the corresponding first clamp and steer the battery cell, and then to place the battery cell on the second clamp; or, the steering assembly is configured to take out the battery cell with the second connecting seam welded from the corresponding second clamp and steer the battery cell, and then to place the battery cell on the first clamp.
The end cover welding apparatus according to claim 2, wherein the steering assembly comprises a supporting frame, a clamping jaw mechanism and a steering motor; the supporting frame is arranged on the outer side of the conveying line, and the clamping jaw mechanism is positioned above the conveying line and is rotatably supported on the supporting frame; the steering motor is in transmission connection with the clamping jaw mechanism and is configured to drive the clamping jaw mechanism to rotate relative to the supporting frame so as to steer; and the clamping jaw mechanism is configured to clamp the battery cell and steer the battery cell.
The end cover welding apparatus according to claim 3, wherein the steering assembly comprises a lifting frame and a lifting motor; the lifting frame is supported on the supporting frame in a lifting mode, and the clamping jaw mechanism is rotatably arranged on the lifting frame; and the lifting motor is arranged on the supporting frame or the lifting frame, is in transmission connection with the lifting frame and is configured to drive the lifting frame to lift up and down relative to the supporting frame.
The end cover welding apparatus according to claim 2, wherein the conveying line comprises a first conveying branch line, a second conveying branch line, a first transferring mechanism and a second transferring mechanism; the first conveying branch line and the second conveying branch line are arranged side by side, and are opposite in conveying directions; the first transferring mechanism is arranged at one end of the first conveying branch line and one end of the second conveying branch line and is configured to transfer the first clamp and the second clamp from the first conveying branch line to the second conveying branch line; the second transferring mechanism is arranged at the other end of the first conveying branch line and the other end of the second conveying branch line and is configured to transfer the first clamp and the second clamp from the second conveying branch line to the first conveying branch line; and the welding assembly is arranged along the first conveying branch line, and the steering assembly is arranged along the second conveying branch line.
The end cover welding apparatus according to claim 1, wherein the welding assembly comprises a first welding mechanism and a second welding mechanism which are arranged at an interval along the conveying line; and the first welding mechanism is configured to pre-weld the first connecting seam or the second connecting seam, and the second welding mechanism is configured to further weld the first connecting seam or the second connecting seam after pre-welding.
The end cover welding apparatus according to claim 6, wherein the first welding mechanism comprises two pre-welding mechanisms which are oppositely arranged on two sides of the conveying line; the second welding mechanism comprises two full-welding mechanisms which are oppositely arranged on the two sides of the conveying line; the two pre-welding mechanisms are configured to pre-weld parts of the first connecting seams or the second connecting seams in related directions; and the two full-welding mechanisms are configured to carry out full welding on parts of the first connecting seams or the second connecting seams in related directions.
The end cover welding apparatus according to claim 7, wherein the second welding mechanism is configured to carry out first welding on the first connecting seam or the second connecting seam after pre-welding in a first direction, and carry out second welding on the first connecting seam or the second connecting seam after first welding in a second direction, and the first direction is opposite to the second direction.
The end cover welding apparatus according to claim 1, wherein the welding assembly comprises at least one full-welding mechanism which is configured to carry out full welding on the first connecting seam or the second connecting seam.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a rolling assembly which is spaced from the welding assembly and is configured to roll the battery cell welded by the welding assembly so as to roll welding flux on the first connecting seam or the second connecting seam.
The end cover welding apparatus according to claim 10, wherein the rolling assembly comprises two rolling mechanisms which are oppositely arranged on the two sides of the conveying line; and the two rolling mechanisms are configured to abut against the battery cell from the two sides of the conveying line so as to roll the first connecting seam or the second connecting seam, and a flange, exceeding the case, of the end cover.
The end cover welding apparatus according to claim 11, wherein each rolling mechanism comprises a support and two rollers; the support is arranged on the outer side of the conveying line, and the two rollers are arranged at an interval on the support in an extending direction of the conveying line, then the battery cell can pass through the two rollers in sequence; and the two rollers are rotatably arranged on the support so as to roll the battery cell.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a welding slag cleaning assembly which is spaced from the welding assembly along the conveying line and is configured to clean welding slag on the battery cell welded by the welding assembly, so as to separate the welding slag from the battery cell.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a press-fitting assembly which is spaced from the welding assembly along the conveying line and is configured to perform press-fitting on the case and the end cover before the battery cell is conveyed to the welding assembly; and the welding assembly is configured to weld the battery cell after press-fitting.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a feeding assembly which is spaced from the conveying line and is configured to place the battery cell to be fed and welded on the first clamp or the second clamp.
The end cover welding apparatus according to claim 15, wherein the feeding assembly comprises a material storage mechanism and a feeding mechanism, and the material storage mechanism is configured to store the battery cell to be fed and welded; and the feeding mechanism is arranged along the conveying line, and is configured to take out the corresponding battery cell from the material storage mechanism and to place the battery cell on the first clamp or the second clamp.
The end cover welding apparatus according to claim 16, wherein the material storage mechanism is configured to store the battery cell in a preset placement posture relative to the conveying line; the feeding mechanism is configured to take out the battery cell in the preset placement posture from the material storage mechanism and convey the battery cell to the first clamp in the preset placement posture; and the preset placement posture is consistent with a fixed posture required by the first clamp.
The end cover welding apparatus according to claim 1, wherein the end cover welding apparatus comprises a discharging assembly which is spaced from the conveying line and is configured to take out the welded battery cell from the conveying line and convey the battery cell outwards.
The end cover welding apparatus according to claim 18, wherein the discharging assembly comprises a transferring mechanism and a conveying mechanism; the transferring mechanism is arranged along the conveying line and is configured to transfer the welded battery cell from the conveying line to the conveying mechanism; and the conveying mechanism is configured to convey the corresponding battery cell outwards.
The end cover welding apparatus according to claim 19, wherein the conveying mechanism comprises a first conveying sub-mechanism and a second conveying sub-mechanism; the transferring mechanism is configured to transfer the battery cell which is welded and passes detection from the conveying line to the first conveying sub-mechanism, and to transfer the battery cell which is welded and does not pass detection from the conveying line to the second conveying sub-mechanism; and the first conveying sub-mechanism and the second conveying sub-mechanism are configured to convey relatively borne battery cells outwards respectively.

Description

The present application claims priority to Chinese Patent Application 2023116434461, filed on November 30, 2023 and entitled "END COVER WELDING APPARATUS, BATTERY ASSEMBLING SYSTEM, ASSEMBLING METHOD AND BATTERY CELL", which is incorporated herein by reference in its entirety. TECHNICAL FIELD The present application relates to the field of battery processing, and particularly relates to an end cover welding apparatus, a battery assembling system, an assembling method and a battery cell. BACKGROUND With the development of battery technology, battery cells are used in more and more fields, and have gradually replaced traditional fossil energy in the field of automotive power. Battery cells can store chemical energy and convert it into electrical energy in a controlled manner. In recyclable battery cells, active substances can be activated by charging for reuse after discharge. In the process of mass production of battery cells, it is often necessary to use a cover welding apparatus for battery cells. However, existing cover welding apparatus have the problem of high cost. In addition, the above is used only for providing background technical information related to the present application, and do not necessarily constitute related technology. SUMMARY In view of the above problems, the present application provides an end cover welding apparatus for a battery cell, an assembling method and a battery cell, aiming to decrease the manufacturing cost of the end cover welding apparatus for the battery cell. One embodiment of the present application provides an end cover welding apparatus for a battery cell; the battery cell includes a case and an end cover which is arranged at one end of the case; a joint of the case and the end cover is provided with a first connecting seam and a second connecting seam which are arranged along a circumferential direction of the case; the end cover welding apparatus includes a material conveying assembly and a welding assembly, in which, the material conveying assembly includes a conveying line, a first clamp and a second clamp, and the first clamp and the second clamp are arranged at an interval on the same conveying line; the first clamp is configured to fix the case and expose the first connecting seam; the second clamp is configured to fix the case and expose the second connecting seam; and the welding assembly is arranged along the conveying line and is configured to weld the first connecting seam when the first clamp with the battery cell fixed is conveyed to the welding assembly, and is also configured to weld the second connecting seam when the second clamp with the battery cell fixed is conveyed to the welding assembly. By means of above way, when the battery cell is placed on the first clamp, the first connecting seam can be welded by the welding assembly; and when the battery cell is placed on the second clamp, the second connecting seam can be welded by the welding assembly. Therefore, the welding assembly can be configured to weld the first connecting seam and can also be configured to weld the second connecting seam, thereby decreasing the manufacturing cost of the end cover welding apparatus. In some embodiments, the end cover welding apparatus includes a steering assembly which is spaced from the welding assembly along the conveying line; the conveying line is configured to convey the first clamp and the second clamp to the steering assembly from the welding assembly, and then convey to the welding assembly; the steering assembly is configured to take out the battery cell with the first connecting seam welded from the corresponding first clamp and steer the battery cell, and then place the battery cell on the second clamp; or, the steering assembly is configured to take out the battery cell with the second connecting seam welded from the corresponding second clamp and steer the battery cell, and then place the battery cell on the first clamp. By means of above way, the steering assembly can transfer the battery cell from the first clamp to the second clamp or transfer the battery cell from the second clamp to the first clamp; when the battery cell is placed on the first clamp, the first connecting seam can be welded; and when the battery cell is placed on the second clamp, the second connecting seam can be welded. In addition, the first connecting seam and the second connecting seam can be welded by the same welding assembly, thus decreasing the cost of a welding apparatus. In some embodiments, the steering assembly includes a supporting frame, a clamping jaw mechanism and a steering motor; the supporting frame is arranged on the outer side of the conveying line, and the clamping jaw mechanism is positioned above the conveying line and is rotatably supported on the supporting frame; the steering motor is in transmission connection with the clamping jaw mechanism and is configured to drive the clamping jaw mechanism to rotate relative to the supporting frame so as to s