电池单体、电池装置及用电装置

What is AI technical title?
AI technical title is built by Patsnap AI team. It summarizes the technical point description of the patent document.
By reducing the thickness of the current collector and increasing the thickness of the tab in the battery cell, a structure with inconsistent thickness is formed, which solves the problem of low energy density and discharge power of the battery cell, reduces the overcurrent heating of the tab, and achieves higher energy density and discharge power.

CN224519877UActive Publication Date: 2026-07-17CONTEMPORARY AMPEREX TECHNOLOGY CO LTD

Patent Information

Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner: CONTEMPORARY AMPEREX TECHNOLOGY CO LTD
Filing Date: 2025-04-22
Publication Date: 2026-07-17

AI Technical Summary

Technical Problem

In existing battery devices, the energy density and discharge power of individual battery cells are low, and the tabs suffer from severe overcurrent and overheating.

Method used

By reducing the thickness of the current collector and increasing the thickness of the tab, with the current collector being thinner than the tab, a structure with inconsistent thickness is formed to improve energy density and discharge power while reducing the risk of tab overcurrent.

Benefits of technology

It improves the energy density and discharge power of individual battery cells, reduces the overcurrent risk and heat generation of the tabs, and conforms to the development trend of battery cell miniaturization.

✦ Generated by Eureka AI based on patent content.

Smart Images

Figure CN224519877U_ABST

Patent Text Reader

Abstract

本申请公开了一种电池单体、电池装置及用电装置。电池单体包括电极组件，电极组件包括集流体与极耳，集流体具有第一面与第二面，第一面与第二面相邻；极耳连接于集流体的第一面；在垂直于第二面的方向上，集流体的厚度小于与其连接的极耳的厚度。上述，集流体的厚度小于极耳的厚度，一方面，能通过减小集流体的厚度，提升电极组件的能量密度与电池单体的放电功率。另一方面，本申请在集流体变薄的同时能增大极耳的厚度，还能减小极耳过流的风险，减少了电池单体的产热量，温升变小。

Need to check novelty before this filing date? Find Prior Art

Claims

1. A battery cell, characterized by, The battery cell includes an electrode assembly, which includes: A current collector having a first surface and a second surface, wherein the first surface and the second surface are adjacent to each other; A tab is attached to a first surface of the current collector; in a direction perpendicular to the second surface, the thickness of the current collector is less than the thickness of the tab to which it is attached.

2. The battery cell according to claim 1, characterized in that, The ratio of the thickness of the electrode tab to the thickness of the current collector is greater than 1 and less than 3.

3. The battery cell of claim 2, wherein, The electrode assembly includes a positive electrode and a negative electrode, which are spaced apart. The positive electrode includes a first current collector and a first tab connected to the first current collector; The negative electrode includes a second current collector and a second tab connected to the second current collector.

4. The battery cell according to claim 3, characterized in that, The thickness of the first electrode ranges from 5 micrometers to 20 micrometers; The thickness of the second electrode ranges from 1 micrometer to 10 micrometers.

5. The battery cell according to claim 4, characterized in that, The thickness of the first electrode ranges from 10 micrometers to 15 micrometers; The thickness of the second electrode ranges from 3 micrometers to 6 micrometers.

6. The battery cell of claim 3, wherein, The positive electrode sheet includes a positive electrode active material region, which includes: Episode 1: Fluids; A positive electrode active material, wherein the positive electrode active material is disposed on the first current collector; The thickness of the positive electrode active material region ranges from 80 micrometers to 200 micrometers.

7. The battery cell of claim 3, wherein, The negative electrode sheet includes a negative electrode active material region, which includes: Second episode of fluid; A negative electrode active material, wherein the negative electrode active material is disposed on the second current collector; The thickness of the negative electrode active material region ranges from 50 micrometers to 150 micrometers.

8. The battery cell according to claim 1, characterized in that, The thickness of the side of the electrode tab that is connected to the current collector is greater than the thickness of the side that faces away from the current collector.

9. The battery cell according to claim 8, characterized in that, The electrode tab is tapered, and its thickness gradually decreases along the direction away from the current collector.

10. The battery cell according to claim 1, characterized in that, The thickness of the side of the current collector connected to the electrode tab is greater than the thickness of the side facing away from the electrode tab.

11. The battery cell according to claim 10, characterized in that, The current collector is tapered, and its thickness gradually decreases along the direction away from the tab.

12. The battery cell according to claim 1, characterized in that, Multiple electrodes are stacked, and along the stacking direction from the inner layer to the outer layer, the thickness of the next electrode is less than the thickness of the previous electrode.

13. A battery device characterized by comprising: The battery device includes the battery cell according to any one of claims 1-12.

14. An electrical device, comprising: The electrical device includes the battery device as described in claim 13.