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A battery charging and battery technology, applied in battery circuit devices, circuit devices, secondary battery charging/discharging, etc., can solve lithium battery safety risks, battery capacity attenuation, slow charging speed, etc., to shorten charging time, eliminate Polarization, the effect of increasing the charging speed
Inactive Publication Date: 2017-05-31
NINGDE AMPEREX TECH
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Using this method for charging, if you want to increase the charging speed, you need to use a larger constant current to charge the battery, and the anode potential will drop rapidly due to the larger ohmic polarization and concentration polarization, which will cause lithium ions to The surface of the anode is reduced to metal lithium, which will cause a great
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[0044] Example one
[0045] figure 1 This is a flowchart of an embodiment of a battery charging method provided by an embodiment of the present invention, such as figure 1 As shown, the battery charging method provided by the embodiment of the present invention may specifically include the following steps:
[0046] 101. Pulse charging the battery at least twice, and stop pulse charging the battery until the voltage of the battery reaches the voltage threshold.
[0047] In the embodiment of the present invention, the same positive electrode material and negative electrode material are used to make the battery cells. Since the battery core materials have the same properties, they jointly determine that the performance of the battery is not different. When the performance of the battery is difficult to change, the charging speed of the battery is improved by reducing the charging time. Therefore, in the embodiment of the present invention, a pulse charging method is used to charge the ...
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[0080] Comparison plan one
[0081] Test temperature: 25℃
[0082] Charging condition setting: constant current is 0.7C, cut-off voltage is 4.4V, cut-off current is 0.05C.
[0083] Charging process: Use a constant current of 0.7C to charge the battery until the battery voltage reaches the cut-off voltage of 4.4V, and continue to use a constant voltage of 4.4V to charge the battery until the battery current reaches the cut-off current of 0.05C.
Example
[0084] Comparison plan two
[0085] Test temperature: 0℃
[0086] Charging condition setting: constant current is 0.1C, cut-off voltage is 4.4V, cut-off current is 0.05C.
[0087] Charging process: Use a constant current of 0.1C to charge the battery until the battery voltage reaches the cut-off voltage of 4.4V, and continue to use a constant voltage of 4.4V to charge the battery until the battery current reaches the cut-off current of 0.05C.
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Abstract
The embodiment of the invention provides a battery charging method and device. The battery charging method provided by the embodiment of the invention comprises the following steps: performing pulse charging on a battery for at least two times and stopping pulse charging for the battery until the voltage of the battery reaches a voltage threshold; performing constant-voltage charging on the battery and stopping constant-voltage charging for the battery until the current of the battery reaches a cutoff current, wherein each time of pulse charging comprises the following steps: performing constant-current charging on the battery with a first constant current; performing constant-current charging on the battery with a second constant current; resting the battery; and performing constant-current discharging on the battery with a third constant current. According to the technical scheme provided by the invention, the process of each time of pulse charging comprises the steps of resting the battery and discharging the battery, so that the polarization phenomenon generated by the battery in the charging process can be eliminated, and therefore, the safety of the battery is improved; and with adoption of a pulse charging manner, the charging time is shortened, and therefore, the charging speed is increased.
Description
technical field [0001] The invention relates to the field of battery technology, in particular to a battery charging method and device. Background technique [0002] With the continuous improvement of modern technology, people are more and more dependent on the terminal. As a battery that provides electrical energy for the terminal, how to enhance battery life and improve charging speed has attracted more and more attention. [0003] For charging the battery, the most common charging method in the prior art is: first charge with a constant current until the battery reaches a certain voltage, and then charge with a constant voltage until it reaches the cut-off current. Using this method for charging, if you want to increase the charging speed, you need to use a larger constant current to charge the battery, and the anode potential will drop rapidly due to the larger ohmic polarization and concentration polarization, which will cause lithium ions to The surface of the anode i...
Claims
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Application Information
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