A terminal device, comprising a charging/discharging protection circuit and a processor , wherein the charging/discharging protection circuit comprises a power supply end (VDD) connected to a positive electrode of a battery , a grounding end (VSS) connected to a negative electrode of the battery , an under-voltage protection threshold control end (UVC) connected to the processor and configured to receive, from the processor , a first control and a second control signal and a discharging control end (DO) configured to output a third control signal; wherein the processor is configured to: when a temperature of the battery is smaller than a set temperature threshold and a discharging current of the battery is greater than a set current threshold, reduce a discharging cutoff voltage of the battery and send the first control signal; the charging/discharging protection circuit is configured to reduce an under-voltage protection threshold of the battery under the control of the first control signal; the processor is further configured to: when an output voltage of the battery is smaller than the discharging cutoff voltage of the battery , control the terminal device to be powered off, increase the discharging cutoff voltage of the battery , and send the second control signal; the charging/discharging protection circuit is further configured to increase the under-voltage protection threshold of the battery under the control of the second control signal; and the charging/discharging protection circuit is further configured to: compare the output voltage of the battery and the under-voltage protection threshold of the battery and output the third control signal according to a comparison result, wherein the third control signal is used for controlling a discharging loop of the battery to be switched on or switched off, and the discharging cutoff voltage is greater than the under-voltage protection threshold. a charging/discharging protection circuit and a processor , wherein the charging/discharging protection circuit comprises a power supply end (VDD) connected to a positive electrode of a battery , a grounding end (VSS) connected to a negative electrode of the battery , an under-voltage protection threshold control end (UVC) connected to the processor and configured to receive, from the processor , a first control and a second control signal and a discharging control end (DO) configured to output a third control signal; wherein the processor is configured to: when a temperature of the battery is smaller than a set temperature threshold and a discharging current of the battery is greater than a set current threshold, reduce a discharging cutoff voltage of the battery and send the first control signal; the charging/discharging protection circuit is configured to reduce an under-voltage protection threshold of the battery under the control of the first control signal; the processor is further configured to: when an output voltage of the battery is smaller than the discharging cutoff voltage of the battery , control the terminal device to be powered off, increase the discharging cutoff voltage of the battery , and send the second control signal; the charging/discharging protection circuit is further configured to increase the under-voltage protection threshold of the battery under the control of the second control signal; and the charging/discharging protection circuit is further configured to: compare the output voltage of the battery and the under-voltage protection threshold of the battery and output the third control signal according to a comparison result, wherein the third control signal is used for controlling a discharging loop of the battery to be switched on or switched off, and the discharging cutoff voltage is greater than the under-voltage protection threshold. <EOS>