A method for selecting li(m1-xfex)po4/li4ti5o12 high-capacity batteries
A high-capacity, battery technology, applied in the field of lithium-ion batteries, can solve the problem that screening or selection methods cannot be accurately and effectively screened out
Active Publication Date: 2022-05-31
天津普兰能源科技有限公司
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Problems solved by technology
[0005] The technical problem to be solved by the present invention is that existing screening or selection methods cannot accurately and effectively screen out Li(M 1-x Fe x )PO 4 / Li 4 Ti 5 o 12 The actual internal resistance and self-discharge of the system battery
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Abstract
The present invention relates to a Li(M 1‑x Fe x )PO 4 / Li 4 Ti 5 o 12 High-capacity battery selection methods, including Li(M 1‑x Fe x )PO 4 / Li 4 Ti 5 o 12 The high-capacity battery is tested in at least two of the high-electricity state, the half-electricity state and the low-electricity state, and the battery cells are selected and matched according to the test results. Since the internal resistance and self-discharge of lithium batteries are also constantly changing under different charged states, the present invention is mainly based on Li(M 1‑x Fe x )PO 4 / Li 4 Ti 5 o 12 The battery has three unique rapid voltage drop areas in the charge and discharge curve. By testing and screening at least two of these three rapid voltage drop areas, it can effectively ensure the internal resistance and self-discharge trend of the battery in each working state after matching. High consistency, after a long time of work, the battery cells can still maintain a high degree of consistency, improving the service life of the module.
Description
A Li(M 1‑x Fe x )PO 4 / Li 4 Ti 5 O 12 High-capacity battery selection method technical field The present invention relates to lithium ion battery technical field, be specifically related to a kind of Li(M 1‑x Fe x )PO 4 / Li 4 Ti 5 O 12 high capacity Battery selection method. Background technique [0002] Lithium battery has become a fast-charging power source due to its high safety, long life, excellent rate performance and low temperature characteristics. Preferred objects for batteries, start-stop system power, and energy storage systems. In practical applications of lithium-ion batteries, the battery cell It is necessary to form battery modules in series and parallel mode. Usually, the series-parallel mode has extremely strict requirements on the consistency between battery cells. Harsh. The difference between the cells will seriously affect the capacity of the battery module, and in severe cases, it will cause irrev...
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IPC IPC(8): B07C5/344
CPCB07C5/344Y02E60/10
Inventor 崔维国费鹏扬李爱红王茂范
Owner 天津普兰能源科技有限公司