CN-224232645-U - Cold pressing equipment and battery production line

CN224232645UCN 224232645 UCN224232645 UCN 224232645UCN-224232645-U

Abstract

The application relates to the technical field of battery manufacturing, and provides cold pressing equipment and a battery production line. The cold pressing equipment comprises a pole piece conveying system, a heating mechanism and a heating mechanism, wherein the pole piece conveying system comprises an unreeling mechanism, a first traction mechanism, a first tension adjusting mechanism, a first pinch roll and a cold pressing mechanism which are sequentially arranged along the pole piece conveying direction, and the heating mechanism is arranged between the first traction mechanism and the first tension adjusting mechanism and is used for heating a pole lug area of a pole piece so as to adjust the extensibility of the pole lug area. According to the technical scheme, the conditions of cold-pressing broken strips and poor tab extension caused by insufficient extensibility of tab areas of the pole pieces can be improved, and therefore the production efficiency and the production quality of the pole pieces can be improved.

Inventors

WANG FENG
SUN KAI
Xie Weigan
WU HAO
HE YADONG
GUO XINYU

Assignees

江苏时代新能源科技有限公司

Dates

Publication Date: 20260512
Application Date: 20250103

Claims (10)

1. A cold pressing apparatus, comprising: The pole piece conveying system comprises an unreeling mechanism, a first traction mechanism, a first tension adjusting mechanism, a first pinch roll and a cold pressing mechanism which are sequentially arranged along the pole piece travelling direction; the heating mechanism is arranged between the first traction mechanism and the first tension adjusting mechanism and is used for heating the lug area of the pole piece.
2. The cold press apparatus according to claim 1, wherein the heating mechanism comprises a first heating member and a second heating member, the first heating member and the second heating member being disposed on both sides of the pole piece in the width direction, respectively, for heating a first tab region and a second tab region formed on both sides of the pole piece in the width direction, respectively.
3. The cold press apparatus according to claim 2, wherein the first heating assembly includes two first heating members for being disposed on both sides of the first tab region in the thickness direction, respectively; and/or the second heating component comprises two second heating pieces, and the two second heating pieces are respectively arranged at two sides of the second lug area in the thickness direction.
4. A cold press according to claim 3, wherein the first heating element and/or the second heating element comprises an infrared lamp.
5. Cold press plant according to any one of claims 1-4, characterized in that the cold press plant further comprises: The detection mechanism comprises a first detection component and a second detection component, wherein the first detection component is used for detecting the extensibility of the tab area of the pole piece after passing through the heating mechanism, and the second detection component is used for detecting the tape moving speed of the pole piece.
6. The cold press apparatus of claim 5, further comprising a control device electrically connected to the detection mechanism, the heating mechanism, and the pole piece delivery system.
7. The cold press apparatus according to claim 5, wherein the number of the first detecting members is two, the two groups of the first detecting members are respectively arranged on both sides of the pole piece in the width direction, and each group of the first detecting members includes a first distance sensor and a second distance sensor respectively arranged upstream and downstream of the heating mechanism and respectively detecting the width of the tab region; And/or the second detection assembly comprises a speed sensor.
8. The cold press apparatus according to any one of claims 1 to 4, wherein the pole piece conveying system further comprises a second pinch roller, a second tension adjusting mechanism, a second traction mechanism, and a winding mechanism provided downstream of the cold press mechanism and sequentially in a pole piece feeding direction.
9. The cold press apparatus of claim 8, wherein the pole piece delivery system further comprises: The first climbing roller is arranged between the heating mechanism and the first tension adjusting mechanism, and the second climbing roller is arranged between the second tension adjusting mechanism and the second traction mechanism; The first roller passing device comprises a first roller passing device and a second roller passing device, wherein the first roller passing device is arranged between the first pinch roller and the cold pressing mechanism, and the second roller passing device is arranged between the cold pressing mechanism and the second pinch roller.
10. A battery production line, characterized by comprising a cold press plant according to any one of claims 1-9.

Description

Cold pressing equipment and battery production line Technical Field The application relates to the technical field of battery manufacturing, in particular to cold pressing equipment and a battery production line. Background This section provides merely background information related to the present disclosure and is not necessarily prior art. At present, in the production process of a battery, a pole piece is required to be manufactured through a cold pressing process, a coated current collector is required to apply pressure through a cold pressing roller to achieve standard compaction of the pole piece, and then tension is applied through a pinch roller to achieve a pole lug meeting the extension requirement. In the process, the tab expansion requirement on the current collector is high, and the current collector with poor expansion frequently generates belt breakage or tab expansion failure in the manufacturing process, so that the productivity of cold-pressed pole pieces and the production quality of battery monomers are seriously affected. Disclosure of utility model The application aims to provide cold pressing equipment and a battery production line, which are used for improving the conditions of cold pressing broken strips and poor tab extension caused by insufficient elongation of tab areas of pole pieces. The aim is achieved by the following technical scheme: In a first aspect, the application provides cold pressing equipment, which comprises a pole piece conveying system, a heating mechanism and a cooling mechanism, wherein the pole piece conveying system comprises an unreeling mechanism, a first traction mechanism, a first tension adjusting mechanism, a first pinch roll and a cold pressing mechanism which are sequentially arranged along a pole piece travelling direction, and the heating mechanism is arranged between the first traction mechanism and the first tension adjusting mechanism and is used for heating a pole lug area of a pole piece. According to the cold pressing equipment provided by the application, the heating mechanism is arranged between the first traction mechanism and the first tension adjusting mechanism, and the heating mechanism is used for heating the tab area of the pole piece, so that the extensibility of the tab area of the pole piece can be improved, the extensibility of the tab area of the pole piece can reach the standard of normal production, the conditions of cold pressing broken belt and poor tab extension caused by insufficient extensibility of the tab area of the pole piece can be further improved, the production efficiency can be improved, and the production cost can be reduced. In addition, the cold pressing equipment provided by the application can also have the following additional technical characteristics: In some embodiments of the present application, the heating mechanism includes a first heating component and a second heating component, and the first heating component and the second heating component are respectively disposed on two sides of the pole piece in the width direction, and are used for heating a first tab area and a second tab area formed on two sides of the pole piece in the width direction respectively. In the technical scheme, the first heating component and the second heating component of the heating mechanism are respectively arranged on two sides of the width direction of the pole piece, and the first lug area and the second lug area formed on two sides of the width direction of the pole piece are respectively heated, so that the extensibility of the lugs in the first lug area and the second lug area can be improved, and the risk of broken strips or poor lug extension in the pole piece tape running process can be further reduced. In some embodiments of the present application, the first heating assembly includes two first heating members respectively disposed on both sides of the first tab region in the thickness direction, and/or the second heating assembly includes two second heating members respectively disposed on both sides of the second tab region in the thickness direction. In the above technical scheme, the two first heating parts of the first heating assembly are utilized to heat the two sides of the thickness direction of the first tab area respectively, and the two second heating parts of the second heating assembly are utilized to heat the two sides of the thickness direction of the second tab area respectively, so that the heating efficiency of tabs of the first tab area and the second tab area of the pole piece can be further improved, and the extensibility of tabs of the first tab area and the second tab area can be further improved by rapid adjustment, so that the extensibility of the tabs of the first tab area and the second tab area can rapidly reach the production standard, and the production efficiency is effectively improved. In some embodiments of the application, the first heating element and/or the second heating ele