Contemporary Amperex Technology Co., Ltd.

Lingbo Zhu

Peng Wang

Haizu Jin

Quankun Li

Pinghua Deng

Jian Guo

Qingkui Chi

Yongshou Lin

Kai Wu

Yuanbao Chen

Xing Li

Xiaowen Zhang

Hu Xu

Kaifu Zhong

Miaomiao Ren

Youlei Lai

Xiangyan Bu

Donglai Zheng

Qingyuan Jiang

Long Xu

Guijiu Qu

This application provides a current collecting member, a secondary battery, and a fabrication method. The secondary battery includes an electrode assembly, a housing, a top cover assembly and current collecting members. The electrode assembly includes a main body portion and a first tab extending from an end of the main body portion along a transverse direction. The top cover assembly includes a top cover plate and a first electrode terminal disposed on the top cover plate connected to the housing. The current collecting member is connected to the first tab and the first electrode terminal. The current collecting member includes a substrate and a support plate, the substrate being provided at a side of the main body portion along a transverse direction, the support plate extending from an end part of the substrate in a longitudinal direction, and the first tab being connected to the support plate.

Current collecting member, secondary battery and fabrication method

The present disclosure relates to a battery unit and a battery module, the battery unit includes an electrode assembly, including a main body portion and a tab; two electrode terminals; and two current collecting members respectively connecting the tabs on both sides of the main body portion with the respective electrode terminals; the current collecting member includes a guiding plate and a supporting plate, the guiding plate is located on one side of the main body portion along the length direction, a reinforcement portion is arranged on the guiding plate and is configured to reduce the deformation of the guiding plate towards the main body portion; and the supporting plate is connected to an end of the guiding plate along the width direction, the tab is bent relative to the length direction and connected to the supporting plate. The battery unit can reduce the bending deformation of the guiding plate.

Battery unit and battery module

The secondary battery of the present invention includes: a top cover, a first electrode terminal, a second electrode terminal, an electrode-tab pad-plate, an electrode assembly, a first electrode-tab and a second electrode-tab; the first and second electrode terminal are arranged on the top cover, the electrode-tab pad-plate is a strip-plate shaped structure, and is located between the top cover and electrode assembly, the first electrode-tab includes a connecting part, a folding part and a welding part, the connecting part is beneath the electrode-tab pad-plate, the welding part is above is the electrode tab pad plate, and the connecting part is connected with the electrode assembly, the welding part is connected with the first electrode terminal, the folding part is connected with the connecting part and welding part bypassing the electrode-tab pad-plate; the second electrode terminal is connected with the electrode assembly through the second electrode-tab.

Secondary battery

The present application provides a top cover of power battery, including top cover plate, first electrode unit and second electrode unit, the first electrode unit includes insulation piece, conductive plate, deformable plate and sealing piece, the top cover plate is provided with deformable plate connecting hole and fixing hole, the deformable plate seals the deformable plate connecting hole, the insulation piece is provided with top cover plate connecting portion and conductive plate connecting portion, the insulation piece is fixed underneath the top cover plate through cooperation of top cover plate connecting portion and fixing hole, the conductive plate is insulated from and fixed with the top cover plate through the conductive plate connecting portion, the conductive plate is electrically connected with the deformable plate, the sealing piece seals path from the fixing hole to interior of the power battery passing through gap between insulation piece and top cover plate.

Top cover of power battery and power battery

The secondary battery of the present invention includes: a top cover, a first electrode terminal, a second electrode terminal, an electrode-tab pad-plate, an electrode assembly, a first electrode-tab and a second electrode-tab; the first and second electrode terminal are arranged on the top cover, the electrode-tab pad-plate is a strip-plate shaped structure, and is located between the top cover and electrode assembly, the first electrode-tab includes a connecting part, a folding part and a welding part, the connecting part is beneath the electrode tab pad plate, the welding part is above the electrode tab pad plate, and the connecting part is connected with the electrode assembly, the welding part is connected with the first electrode terminal, the folding part is connected with the connecting part and welding part bypassing the electrode-tab pad-plate; the second electrode terminal is connected with the electrode assembly through the second electrode-tab.

The present application provides a top cover of a power battery and the power battery. The top cover of the power battery includes a first electrode unit and a second electrode unit, the second electrode unit includes a deformable plate, an insulation piece and a conductive plate, the top cover plate is provided with a deformable plate connecting hole, the deformable plate seals the deformable plate connecting hole, the insulation piece is located underneath the top cover plate, the insulation piece is connected with the top cover plate, the conductive plate is insulated from and fixed with the top cover plate through the insulation piece and is electrically connected with the deformable plate. The power battery includes the above top cover of the power battery. The power battery provided by the present application can effectively prevent breaking, losing efficacy or deformation of the conductive plate during using process.

This application provides a top cover of a power battery and a power battery, the top cover includes a top cover sheet, a first electrode unit and a second electrode unit, the first electrode unit includes a turning sheet, an insulating piece and a current cutting-off structure, the current cutting-off structure is fixed in radial projection range of an assembling hole and is electrically connected with the top cover sheet, the turning sheet is fixed at an underneath of the top cover sheet through the insulating piece, the turning sheet is electrically connected with the top cover sheet merely through the current cutting-off structure, and the turning sheet is capable of turning and breaking the current cutting-off structure when an internal pressure of the power battery exceeds a reference pressure, so as to cut off an electrical connection of the current cutting-off structure with the top cover sheet.

The secondary battery of the present invention includes: a top cover, a first electrode terminal, a second electrode terminal, an electrode-tab pad-plate, an electrode assembly, a first electrode-tab and a second electrode-tab; the first and second electrode terminal are arranged on the top cover, the electrode-tab pad-plate is a strip-plate shaped structure, and is located between the top cover and electrode assembly, the first electrode-tab includes a connecting part, a folding part and a welding part, the connecting part is beneath the electrode-tab pad-plate, the welding part is above the electrode-tab pad-plate, the connecting part is connected with the electrode assembly, the welding part is connected with the first electrode terminal, the folding part is connected with the connecting part and welding part bypassing the electrode-tab pad-plate; the second electrode terminal is connected with the electrode assembly through the second electrode-tab.

The invention provides a secondary battery which comprises a cap plate and at least one cell. The secondary battery further comprises connecting pieces, each connecting piece is parallel to the cap plate and positioned at an inside of the cap plate in a thickness direction of the cap plate, a longitudinal direction of each connecting piece is parallel to a length direction of the cap plate, a transverse direction of each connecting piece is parallel to a width direction of the cap plate. Each connecting piece has: a tab welding portion for being welded to the corresponding tab of each cell; and an electrode terminal welding portion connected to the tab welding portion along the longitudinal direction of each connecting piece for being welded to the corresponding electrode terminal of the cap plate so as to electrically connect the corresponding electrode terminal and the corresponding tab of each cell.

The present application relates to an electrode tab pad plate, the electrode tab pad plate is of a fork shape, including a joint part and two first fork feet, the two first fork feet are arranged in parallel, and a first gap is provided between the two first fork feet, both the first fork feet are connected with the joint part. The electrode tab pad plate provided by the present application, through gathering the electrode tabs at inner sides of the electrode tab pad plate, so that the electrode tabs are gathered toward the direction away from the battery housing, so as to guarantee the safety performance of the Li-ion battery, since the space occupied by the electrode tab pad plate is small, which facilitates the improvement of the cell capacity, thereby improving the performance of the battery.

Electrode tab pad plate

The present disclosure provides a secondary battery, which comprises a cap plate, at least two cells and two connecting pieces. The cap plate is provided with two electrode terminals which are opposite in electrical polarity. Each cell has two tabs which are opposite in electrical polarity. Each connecting piece has: an electrode terminal electrical connecting portion for electrically connecting with the corresponding electrode terminal of the cap plate; a plurality of tab electrical connecting portions for electrically connecting with the corresponding tabs of the cells respectively; and a plurality of fusing portions electrically connecting the corresponding tab electrical connecting portion to the electrode terminal electrical connecting portion, a width of each fusing portion is less than a width of the electrode terminal electrical connecting portion. A configuration of the connecting piece is simple, thereby reducing the cumulative heat of the secondary battery and reducing the temperature rise.

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Ningde, China

Lingbo Zhu