Abstract: A method for charging a lithium ion battery includes: acquiring a polarization attribute of the lithium ion battery, the polarization attribute including a maximum charging current under which no lithium plating occurs at an anode of the lithium ion battery; determining, according to the polarization attribute, multiple sections of constant charging currents which have current values decreasing sequentially in a sectional charging sequence; charging the lithium ion battery in sections with the multiple sections of constant charging currents respectively, and after charging in each section, leaving the lithium ion battery standing or discharging the lithium ion battery with a preset discharging current less than the maximum charging current; and performing constant-voltage charging with taking a constant-current cut-off voltage as a constant voltage when a voltage of the lithium ion battery reaches the constant-current cut-off voltage.

Abstract: A silicon negative electrode sheet includes: a current collector; and at least two active coatings containing negative active materials, which are sequentially coated on the current collector. Through holes are formed on the active coating along the thickness direction and are arranged at intervals. The liquid holding capacity of the silicon negative electrode sheet and the charging capacity of a silicon negative electrode can be improved.

Abstract: The present disclosure provides a cell, a battery assembly, and an electronic device. The cell includes first electrode, second electrode, diaphragm, and fixing member which are sequentially laminated to one another and wound to form a bare cell body. The first electrode is located at outermost side of the bare cell body and includes first end portion located on an outer surface of the bare cell body. The first electrode is provided with a first active layer extending to the first end portion. The first end portion is fixed to the outer surface of the bare cell body by the fixing member.

Abstract: A method for controlling charging includes: determining charge cycle counts of a battery; obtaining a set charge cut-off current corresponding to the charge cycle counts based on a preset charge strategy; adjusting a charge cut-off current of the battery according to the set charge cut-off current corresponding to the charge cycle counts to control a charge volume of the battery.

Abstract: A silicon negative electrode sheet includes: a current collector; and at least two active coatings containing negative active materials, which are sequentially coated on the current collector. Through holes are formed on the active coating along the thickness direction and are arranged at intervals. The liquid holding capacity of the silicon negative electrode sheet and the charging capacity of a silicon negative electrode can be improved.

Abstract: A method for charging a lithium ion battery includes: acquiring a polarization attribute of the lithium ion battery, the polarization attribute including a maximum charging current under which no lithium plating occurs at an anode of the lithium ion battery; determining, according to the polarization attribute, multiple sections of constant charging currents which have current values decreasing sequentially in a sectional charging sequence; charging the lithium ion battery in sections with the multiple sections of constant charging currents respectively, and after charging in each section, leaving the lithium ion battery standing or discharging the lithium ion battery with a preset discharging current less than the maximum charging current; and performing constant-voltage charging with taking a constant-current cut-off voltage as a constant voltage when a voltage of the lithium ion battery reaches the constant-current cut-off voltage.

Abstract: A method for controlling charging includes: determining charge cycle counts of a battery; obtaining a set charge cut-off current corresponding to the charge cycle counts based on a preset charge strategy; adjusting a charge cut-off current of the battery according to the set charge cut-off current corresponding to the charge cycle counts to control a charge volume of the battery.