Method and apparatus for detecting state of battery
AssigneeSilergy Semiconductor Technology (Hangzhou) LTD
InventorsXiaodong Huang, Hejinsheng Cao
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Abstract
A method of detecting a state of charge of a battery, can include: obtaining an open circuit voltage in a present cycle according to an open circuit voltage of a previous cycle, a battery internal resistance of the previous cycle, and a battery capacitance of the previous cycle, where the battery internal resistance and the battery capacitance are updated according to the state of charge of the battery; and determining the state of charge of the battery according to the open circuit voltage in the present cycle.
Claims20
A method of detecting a state of charge of a battery, the method comprising:
- a) obtaining an open circuit voltage in a present cycle according to an open circuit voltage of a previous cycle, a battery internal resistance of said previous cycle, and a battery capacitance of said previous cycle, wherein said battery internal resistance and said battery capacitance are updated according to said state of charge of said battery;
- and
- b) determining said state of charge of said battery according to said open circuit voltage in said present cycle.
A method of detecting a state of charge of a battery pack, the method comprising:
- a) obtaining an open circuit voltage in a present cycle according to an open circuit voltage of a previous cycle, a battery pack internal resistance of said previous cycle, and a battery pack capacitance of said previous cycle, wherein said battery pack internal resistance and said battery pack capacitance are updated according to said state of charge of said battery;
- and
- b) determining said state of charge of said battery pack according to said open circuit voltage in said present cycle.
A battery state detector, comprising:
- a) an open circuit voltage computation circuit configured to obtain an open circuit voltage in a present cycle according to an open circuit voltage of a previous cycle, an internal resistance of a battery of said previous cycle, and a capacitance of said battery of said previous cycle, wherein said battery internal resistance and said battery capacitance are updated according to a state of charge of said battery;
- and
- b) a correspondence relationship inquiry circuit configured to determine said state of charge of said battery according to said open circuit voltage in said present cycle.
Dependencies are inferred from the claim text.