Effect of ripple load on Li-ion battery
Effect of ripple load on Li-ion battery
(OP)
I'm investigating the design of a bi-directional switching DC-DC converter that will be connected to a Li-ion battery. The goal is to make the switching frequency relatively high, in the range of 50-100 KHz. Due to the switching, the converter will place a load on the Li-ion battery that contains a DC component and a ripple component at the switching frequency. Similarly, when returning power to the battery, the converter will put a ripple current back into the battery.
I'm trying to figure out how Li-ion batteries handle this high frequency ripple. Is there recommended limits for the ripple current and frequency when charging and discharging? How does the performance of the battery change as the amount of high frequency ripple changes?
Can anyone share some information on this or point me to a good reference? I've done a web search, but it didn't get very far. Thank you.
I'm trying to figure out how Li-ion batteries handle this high frequency ripple. Is there recommended limits for the ripple current and frequency when charging and discharging? How does the performance of the battery change as the amount of high frequency ripple changes?
Can anyone share some information on this or point me to a good reference? I've done a web search, but it didn't get very far. Thank you.





RE: Effect of ripple load on Li-ion battery
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RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
Keith Cress
kcress - http://www.flaminsystems.com
RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
The Importance of Monitoring AC ripple Voltage and Current explains how ripple affects batteries.
RE: Effect of ripple load on Li-ion battery
For the sake of completeness in this thread, I have learned that the skin effect can be important, i.e., at high enough frequencies, the current paths inside the battery will be narrowed by the skin effect and this will increase their effective resistance and cause additional heating inside the battery. In addition, current ripple will induce a changing magnetic field inside the battery which will cause the same type of losses that are found in magnetic cores used for transformers and inductors, i.e., magnetization hysteresis and eddy current losses. These will also heat the battery.
RE: Effect of ripple load on Li-ion battery
Im also trying to do some research in this field (ripple effects on l-ion). May I ask which kind of literature you used?
greets
Handl0r
RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery
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RE: Effect of ripple load on Li-ion battery
RE: Effect of ripple load on Li-ion battery