CN-224204317-U - Battery cell module and battery

CN224204317UCN 224204317 UCN224204317 UCN 224204317UCN-224204317-U

Abstract

The application provides a battery core module and a battery, and belongs to the technical field of power batteries. The battery cell module comprises a shell, a battery cell unit, a cover plate assembly and a pole assembly. Wherein, the electric core unit is located in the casing. The cover plate component covers the battery cell unit and is connected with the shell, and the cover plate component is provided with a first surface and a second surface, and the first surface faces the battery cell unit. The pole assembly is riveted on the cover plate assembly, and the pole assembly penetrates through the first surface of the cover plate assembly and is turned over on the second surface of the cover plate assembly. The battery comprises at least one electric core module. On the basis of the battery cell structure, the height of the pole assembly is reduced, and the internal space of the battery cell unit is increased. The flanging of the pole assembly is arranged to increase the diameter of the pole assembly, so that the area of a weldable area of the pole assembly is increased, and the welding and overcurrent design of the high-capacity battery cell are facilitated. In addition, the pole assembly is produced in a modularized mode, and can be used in different battery cell models, so that development and production cost is reduced.

Inventors

GUI JUNJIE
HE WENWEN
YU CHENG

Assignees

合肥国轩高科动力能源有限公司

Dates

Publication Date: 20260505
Application Date: 20250519

Claims (10)

1. A battery cell module, comprising: A housing; The battery cell unit is positioned in the shell; The cover plate assembly is covered on the battery cell unit and connected with the shell, and is provided with a first surface and a second surface, and the first surface faces the battery cell unit; The pole assembly is riveted to the cover plate assembly, and the pole assembly penetrates through the first face of the cover plate assembly and is turned over to the second face of the cover plate assembly.
2. The battery cell module of claim 1, wherein the terminal assembly comprises a first terminal; The first pole comprises a first pole portion and a first gasket, the first pole portion is located on the first face of the cover plate assembly, the first gasket is located on the second face of the cover plate assembly, the first pole portion faces towards the outer periphery side of one end of the cover plate assembly and is provided with a first protruding portion, and the first pole portion penetrates through the cover plate assembly through the first protruding portion and is turned to the inner edge of the first gasket.
3. The battery cell module of claim 2 wherein the first terminal post further comprises a first insulating portion and a first injection molded portion; The first insulating part is positioned between the first gasket and the second face of the cover plate assembly, and the first gasket and the first insulating part are overlapped; The first injection molding part is covered on the first gasket, and one end part of the first pole part, which faces the cover plate assembly, is exposed out of the first injection molding part.
4. The battery cell module of claim 2 wherein the terminal assembly further comprises a second terminal, the first terminal and the second terminal being positioned at respective ends of the cover assembly; The second pole comprises a second pole part and a second gasket, the second pole part is positioned on the first surface of the cover plate assembly, the second gasket is positioned on the second surface of the cover plate assembly, the second pole part faces to the outer periphery side of one end of the cover plate assembly and is provided with a second protruding part, and the second pole part penetrates through the cover plate assembly through the second protruding part and is turned over to the inner edge of the second gasket.
5. The battery cell module of claim 4, wherein the second post further comprises a second insulating portion and a second injection molded portion; The second insulating part is positioned between the second gasket and the second face of the cover plate assembly, and the second gasket is overlapped with the second insulating part; The second injection molding part is covered on the second gasket, and one end part of the second pole part, which faces the cover plate component, is exposed out of the second injection molding part.
6. The battery cell module of claim 5, wherein the cover assembly comprises a base plate and a stop frame arranged in a stacked manner, the stop frame being located on a side of the base plate facing the battery cell; The stop frame is provided with a stop platform, the stop platform is arranged on the stop frame in a protruding mode, and the stop platform is arranged towards the battery cell unit.
7. The battery cell module of claim 6, wherein the stop frame is provided with two first positioning holes for the pole assembly to pass through, the two first positioning holes are respectively positioned at two ends of the stop frame, and the two first positioning holes respectively correspond to the first pole and the second pole; the substrate is provided with two second positioning holes for the pole assembly to pass through, the two second positioning holes are respectively positioned at two ends of the substrate, and the two second positioning holes respectively correspond to the first pole and the second pole; the first positioning hole corresponds to the second positioning hole.
8. The battery cell module of claim 7, wherein the terminal assembly further comprises a first seal ring and a second seal ring; The first pole part sequentially penetrates through the first positioning hole and the second positioning hole, and the first sealing ring is sleeved on the first pole part so as to enable the first pole to be connected with the cover plate assembly in a sealing way; The second pole part sequentially penetrates through the first positioning hole and the second positioning hole, and the second sealing ring is sleeved on the second pole part so that the second pole is connected with the cover plate component in a sealing mode.
9. The battery cell module of claim 8, wherein the stop frame is provided with an explosion-proof valve; The explosion-proof valve is positioned between the first pole and the second pole; The explosion-proof valve is provided with an explosion-proof membrane, the substrate is provided with a third positioning hole, the third positioning hole is positioned between the two second positioning holes, and the explosion-proof membrane penetrates through the third positioning hole and is attached to the explosion-proof valve.
10. A battery comprising at least one cell module according to any of the preceding claims 1-9.

Description

Battery cell module and battery Technical Field The application relates to the technical field of power batteries, in particular to an electric core module and a battery. Background Along with the continuous development of the technology level and the diversification of the demands of users, the new energy power battery technology is also developed rapidly. The lithium battery has the advantages of high energy density, long service life and the like, and is widely applied to electric automobiles, standby power systems and micro-grid energy storage systems. The existing power lithium battery comprises a winding core, electrolyte, a shell, a cover plate and other structures. In the design of the coverplate, a conventional riveted terminal structure coverplate and an injection molded terminal structure coverplate are generally adopted. The cover plate of the traditional riveting terminal structure is formed by riveting a rivet, a pressing plate, an insulating gasket and a sealing ring. The injection molding terminal structure cover plate is formed by an injection molding process through the pole post and the retaining ring sealing ring. However, the cover plate of the traditional riveting terminal structure at the present stage has larger height of the post after being formed by riveting, and reduces the internal space of the battery cell. In addition, the area of the weldable region of the pole portion is small due to the rivet diameter, and the rivet diameter cannot match the high capacity cell overcurrent design. And the structure of the injection molding terminal structure cover plate is complex and high in cost, and the production efficiency is required to be improved. Disclosure of utility model The application provides a battery cell module and a battery, which are characterized in that the height of a pole assembly is reduced on the basis of a battery cell structure, so that the internal space of a battery cell unit is increased. The flanging of the pole assembly is arranged to increase the diameter of the pole assembly, so that the area of a weldable area of the pole assembly is increased, and the welding and overcurrent design of the high-capacity battery cell are facilitated. In addition, the pole assembly is produced in a modularized mode, and can be used in different battery cell models, so that development and production cost is reduced. In order to achieve the above object, the present application provides the following technical solutions: A first aspect of the application provides a cell module comprising: A housing; The battery cell unit is positioned in the shell; the cover plate component is covered on the battery cell unit and is connected with the shell, and the cover plate component is provided with a first surface and a second surface, and the first surface faces the battery cell unit; the pole assembly is riveted on the cover plate assembly, and the pole assembly penetrates through the first face of the cover plate assembly and is turned over on the second face of the cover plate assembly. On the basis of the technical scheme, the application can be improved as follows. In one possible implementation, the pole assembly includes a first pole; The first pole comprises a first pole part and a first gasket, the first pole part is positioned on the first surface of the cover plate assembly, the first gasket is positioned on the second surface of the cover plate assembly, the first pole part is provided with a first protruding part on the outer periphery side of one end of the first pole part, which faces to the cover plate assembly, and the first pole part penetrates through the cover plate assembly through the first protruding part and is turned over to the inner edge of the first gasket. In one possible implementation, the first pole further comprises a first insulating portion and a first injection molded portion; the first insulating part is positioned between the first gasket and the second surface of the cover plate assembly, and the first gasket is overlapped with the first insulating part; the first injection molding part covers the first gasket, and one end part of the first pole part, which faces the cover plate component, is exposed out of the first injection molding part. In one possible implementation, the pole assembly further comprises a second pole, the first pole and the second pole being respectively positioned at two ends of the cover plate assembly; The second pole comprises a second pole part and a second gasket, the second pole part is positioned on the first face of the cover plate assembly, the second gasket is positioned on the second face of the cover plate assembly, the second pole part is provided with a second protruding part on the outer peripheral side of one end of the second pole part, which faces to the cover plate assembly, and the second pole part passes through the second protruding part to be arranged on the cover plate assembly in a penetrating way and