Charging method of secondary battery with constant current using high charge rate
First Claim
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1. A charging method of a secondary battery comprising:
- a first charging step of charging the secondary battery at a first C-rate from an initial charge voltage to a first charge voltage; and
a second charging step of charging the secondary battery to a target voltage while gradually decreasing a C-rate within a range not exceeding the first C-rate after the voltage of the secondary battery reached the first charge voltage,wherein the first C-rate of the first charging step is 6 C,wherein the gradual decreasing of the C-rate in the second charging step comprises stepwise decreasing the C-rate in proportion to a charge time,wherein the decreasing of the C-rate comprises stepwise decreasing the C-rate within a range from 3 C to 1 C,wherein the first charge voltage has a range from 4.080 V to 4.090 V, andwherein the target voltage has a range from 4.090 V to 4.100 V within a range equal to or greater than the first charge voltage.
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Abstract
Disclosed herein is a charging method of a secondary battery including a first charging step of charging the secondary battery at a first C-rate from an initial charge voltage to a first charge voltage and a second charging step of charging the secondary battery to a target voltage while gradually decreasing a C-rate within a range not exceeding the first C-rate after the voltage of the secondary battery reached the first charge voltage. Consequently, it is possible to prevent deterioration of the battery, thereby improving lifespan characteristics of the battery.
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Citations
6 Claims
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1. A charging method of a secondary battery comprising:
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a first charging step of charging the secondary battery at a first C-rate from an initial charge voltage to a first charge voltage; and a second charging step of charging the secondary battery to a target voltage while gradually decreasing a C-rate within a range not exceeding the first C-rate after the voltage of the secondary battery reached the first charge voltage, wherein the first C-rate of the first charging step is 6 C, wherein the gradual decreasing of the C-rate in the second charging step comprises stepwise decreasing the C-rate in proportion to a charge time, wherein the decreasing of the C-rate comprises stepwise decreasing the C-rate within a range from 3 C to 1 C, wherein the first charge voltage has a range from 4.080 V to 4.090 V, and wherein the target voltage has a range from 4.090 V to 4.100 V within a range equal to or greater than the first charge voltage. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification