Electrode assembly and electrochemical device
An electrode assembly and negative electrode technology, applied in the field of electrochemical devices, can solve the problems of undervoltage in the cell area, poor surface consistency of the pole piece, thermal runaway of internal short circuit, etc., so as to improve the undervoltage problem, prevent the short circuit, reduce the Effects of Risk of Lithium Precipitation Problems
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Method used
Image
Examples
Example Embodiment
[0075] Example one
[0076] See figure 1 , figure 2 and image 3 , The electrode assembly 100 includes a positive electrode plate 10, negative electrode sheet 20, separator 30, positive electrode tab 41 and the negative electrode tab 42. The positive electrode sheet 10 and the negative electrode sheet 20 are stacked and winding disposed, a separator 20 between the film 30 is provided on the positive electrode sheet 10 and the negative electrode sheet. The positive electrode tab 41 is electrically connected to the positive electrode sheet 10, the negative electrode tab 42 is electrically connected to the negative electrode sheet 20.
[0077] Specifically, see figure 2 The positive electrode sheet 10 comprises a cathode current collector 11 and the positive electrode active material layer disposed on the surface of the positive electrode collector 11. In this embodiment, both opposite surfaces of the cathode current collector 11 are respectively provided with the positive electrode a...
Example
[0091] Second embodiment
[0092] See Figure 4 , Figure 5 and Image 6 The electrode assembly 200 of the second embodiment is substantially the same as the electrode assembly 100 of the first embodiment, and the difference is that the second insulation of the second recess 23 and the fourth recessed groove 24 is not provided on the negative electrode sheet 20 of the electrode assembly 200. Part 70. Since the second insulating member 70 is omitted, the size of the first insulating member 60 can be reduced accordingly, facilitating the energy density of the electrode assembly 200.
[0093] In the second embodiment, the dimensional relationship between the second recess 23 and the first protective glue 50 satisfies: 1 mm ≤ l2-l1 ≤ 5 mm, 1 mm ≤ W2-W1 ≤ 5 mm, 0 μm ≤ T2-T1 ≤ 20 μm.
[0094] The dimensional relationship between the first insulating member 60 and the second recess 23 is satisfied, 1 mm ≤ L4-L2 ≤ 10 mm, 1 mm ≤ W4-W2 ≤ 10 mm.
Example
[0095] Third embodiment
[0096] See Figure 7 , Figure 8 and Figure 9 The electrode assembly 300 of the third embodiment is substantially the same as the electrode assembly 100 of the first embodiment, and the difference is that in the electrode assembly 300, the first protective glue 50 or the like is filled to the second recess 23 and the fourth recessed groove 24. The peripheral side of the first protective glue 50 contacts the negative electrode active material layer 22 to eliminate the gap around the first protective glue 50 and the second recess 23 or the fourth recessed groove 24. After the first protective glue 50 is solidified, there is no fluidity, eliminating the gap within the groove facilitates the avoidance of the active material overflow during the pressure of the subsequent electrode assembly 300, lift the pressure resistance and service life of the electrode assembly 300.
[0097] Please refer again Figure 8 and Figure 9 The width of the first protective glue 50 i...
PUM
Property | Measurement | Unit |
---|---|---|
Thickness | aaaaa | aaaaa |
Abstract
Description
Claims
Application Information
- R&D Engineer
- R&D Manager
- IP Professional
- Industry Leading Data Capabilities
- Powerful AI technology
- Patent DNA Extraction
Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.
© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap