A cell protection circuit, comprising a control module, multistage cell units coupled in series and N output interfaces; wherein a positive electrode of a first-stage cell unit and a negative electrode of a last-stage cell unit are each coupled to an output interface, and a negative electrode of each upper-stage cell unit and a positive electrode of an adjacent lower-stage cell unit are coupled to a same output interface; the cell protection circuit is characterised in that it further includes a protection module comprising a charging protection sub-module and a discharging protection sub-module is coupled between at least one output interface in the N output interfaces, other than the output interface coupled to the positive electrode of the first-stage cell unit and the output interface coupled to the negative electrode of the last-stage cell unit, and a cell unit coupled to the at least one output interface; wherein the control module is coupled to the protection module, and is configured to control the protection module to be turned off when an electrical signal on a path where the protection module is located is abnormal; and N is an integer greater than or equal to 3; the charging protection sub-module is coupled to the control module, the control module is configured to control the charging protection sub-module to be turned off in response to detecting an electrical signal on a path where the charging protection sub-module is located is abnormal during charging of the cell unit; and the discharging protection sub-module is coupled to the control module, and the control module is configured to control the discharging protection sub-module to be turned off in response to detecting an electrical signal on a path where the discharging protection sub-module is located is abnormal during discharging of the cell unit. a positive electrode of a first-stage cell unit and a negative electrode of a last-stage cell unit are each coupled to an output interface, and a negative electrode of each upper-stage cell unit and a positive electrode of an adjacent lower-stage cell unit are coupled to a same output interface; the cell protection circuit is characterised in that it further includes a protection module comprising a charging protection sub-module and a discharging protection sub-module is coupled between at least one output interface in the N output interfaces, other than the output interface coupled to the positive electrode of the first-stage cell unit and the output interface coupled to the negative electrode of the last-stage cell unit, and a cell unit coupled to the at least one output interface; wherein the control module is coupled to the protection module, and is configured to control the protection module to be turned off when an electrical signal on a path where the protection module is located is abnormal; and N is an integer greater than or equal to 3; the charging protection sub-module is coupled to the control module, the control module is configured to control the charging protection sub-module to be turned off in response to detecting an electrical signal on a path where the charging protection sub-module is located is abnormal during charging of the cell unit; and the discharging protection sub-module is coupled to the control module, and the control module is configured to control the discharging protection sub-module to be turned off in response to detecting an electrical signal on a path where the discharging protection sub-module is located is abnormal during discharging of the cell unit.