CATL Patente

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

The present application provides a battery cell, a battery, an electrical apparatus, and an energy storage cabinet, and belongs to the field of battery technologies. The battery cell includes a shell, a plurality of pole groups and a plurality of electrode terminals. The shell has a wall portion. A plurality of pole groups are accommodated in the shell and arranged along a first direction. The pole groups comprise a main body group and two tab groups. The two tab groups are spaced apart along the first direction on one side of the main body group in a second direction, and the two tab groups have opposite polarities. A plurality of electrode terminals are installed on the wall portion and are spaced apart along the first direction. Along the first direction, two tab groups close to each other in two adjacent pole groups have the same polarity and are electrically connected to one electrode terminal in common, and two tab groups farthest apart from each other in the plurality of pole groups are electrically connected to two electrode terminals respectively. This can save electrode terminals provided on the shell, and is beneficial for optimizing the production rhythm of the battery cells, thereby improving the production efficiency of the battery cells and reducing the manufacturing cost of the battery cells.

Disclosed in the present application are a defect detection method and system, which belong to the technical field of defect detection. The present application involves: obtaining battery cell images acquired from multiple angles, the battery cell images including a tab portion of a battery cell; performing, by a target detection model, tab defect detection on the battery cell images acquired from multiple angles to obtain a tab detection result, the target detection model being configured to perform tab positioning and tab defect identification; and completing defect detection based on the tab detection result. By using a target detection model to perform tab defect detection on battery cell images acquired from multiple angles, a defect in a tab portion is accurately detected. Compared with manual identification for a tab defect, this improves the efficiency and precision of tab defect detection, and increases the identification rate of minor tab defects.

A graphite negative electrode active material and a preparation method therefor, a negative electrode plate, a secondary battery, and an electrical appparatus. A particle body of the graphite negative electrode active material comprises an interior area and a surface layer area at least partially surrounding the interior area, the surface layer area referring to an area formed extending a distance of 30 nm from the surface of the particle body of the graphite negative electrode active material toward the interior, and the surface layer area comprising a disordered layer. The graphite negative electrode active material can balance the kinetic performance and the cycling stability of a battery.

This disclosure relates to the field of battery technologies and discloses a battery cell (0114), a battery (011), an electric apparatus, and an energy storage apparatus. The battery cell (0114) includes a housing (1), a cell (2), and a ventilation assembly (3). The housing (1) has an accommodating cavity (11). The housing (1) includes a first wall (12). The first wall (12) is provided with a first gas discharge channel. The cell (2) is disposed in the accommodating cavity (11). The ventilation assembly (3) is mounted on the first wall (12) and covers the first gas discharge channel. The ventilation assembly (3) includes a connecting member (31) and a ventilation film (32). The connecting member (31) is provided with at least one through hole (311). The ventilation film (32) covers the through hole(s) (311).

The present application provides a battery cell and a preparation method therefor, a battery, and an electric device. The battery cell comprises: an electrode assembly and an outer package, the electrode assembly comprises a positive electrode sheet, a positive electrode active material layer is provided on the positive electrode sheet, and the positive active material layer comprises a transition metal oxide; the outer package is used for packaging the electrode assembly, a venting device is arranged on the outer package, and the venting device comprises a breathable membrane. The venting device is mounted on the outer package of the battery cell, and excess gas generated due to the instability of transition metals during use of the battery cell is discharged out of the battery cell in time by means of the breathable membrane of the venting device, so that the explosion-proof valve of the battery cell is not prone to abnormal valve opening due to excessively large internal air pressure, improving the reliability of the battery and prolonging the service life thereof.

The present application discloses a battery cell, a battery, and an electric device. The battery cell comprises a casing and a gas permeable membrane assembly; the casing has a wall part, the wall part is provided with a first exhaust hole, and the first exhaust hole makes the interior of the casing and the exterior of the casing communicated; the gas permeable membrane assembly is arranged on the wall part, the gas permeable membrane assembly comprises a gas permeable membrane, and the gas permeable membrane assembly covers the first exhaust hole. In the present application, on the basis of the arrangement, gas inside the battery cell in a sealed state can be discharged through the gas permeable membrane, and gas inside the battery casing is discharged out of the casing in time, thus preventing the air pressure in the battery casing from being too high, reducing the risk that a pressure relief mechanism opens a valve in advance, and greatly prolonging the service life of the battery.

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …