A method for testing the performance of a lithium battery cap PTC
By forming a loop in the lithium battery cap and monitoring the PTC action time under different currents, the problem of inaccurate PTC performance testing in the existing technology is solved, ensuring battery safety and avoiding danger to the battery under high current.
CN120610162BActive Publication Date: 2025-10-17UNION LITHPLUS ENERGY (LIAONING) CORP
2 Cites 0 Cited by
Patent Information
- Application Number
- CN202511120957.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-12
- Publication Date
- 2025-10-17
- Estimated Expiration
- 2045-08-12
AI Technical Summary
Technical Problem
In the existing technology, the PTC performance testing method of lithium battery caps is not accurate enough, resulting in insufficient battery safety evaluation and safety risks.
Method used
By cutting off the steel shell at the bottom of the battery cap and laser welding the nickel and aluminum tabs to form a circuit, the charging cabinet is used to monitor the voltage changes under different constant currents, record the PTC action time, and compare it with the preset expected action time to determine the PTC performance.
Benefits of technology
It can quickly and accurately evaluate the PTC performance of lithium battery caps, confirm the protection effect of PTC under different currents, and avoid the dangers caused by long-term high current in batteries.
✦ Generated by Eureka AI based on patent content.
Abstract
A kind of lithium battery cap PTC performance test method, it is related to battery performance detection analysis field, steps are as follows: 1) the steel shell of the lower part of the cap of battery is cut around, battery positive terminal laser welding nickel lug, cap inside laser welding aluminum lug;Nickel lug and aluminum lug are respectively clamped with charging cabinet alligator clip;2) control charging cabinet, with sequentially reduced I1, I2, I3, …, I n Constant current charges circuit;The voltage U of monitoring cap d , record when voltage U d Reach set-off voltage U SOC , the charging time of whole circuit;3) T n With preset PCT expected action time T e Comparison is carried out, if T n Greater than PCT expected action time T e , it is meaningless action;If T n Less than PCT expected action time T e , this PCT action time is meaningful.The lithium battery cap PTC performance of the present application can be efficiently detected by the above method.
Need to check novelty before this filing date? Find Prior Art