Water ingress detection circuit and water ingress detection method

A water ingress detection method, applied to a water ingress detection circuit,

• wherein the water ingress detection circuit comprises:
• a waterproof detection terminal, a waterproof detection module, a switch module, a wake-up module and a main control module, wherein the switch module is connected between the waterproof detection terminal and the waterproof detection module, and the waterproof detection module and the switch module are further connected to the main control module;
• a battery pack comprises a first electrode and a second electrode, the wake-up module is connected to the first electrode or the second electrode of the battery pack, the wake-up module is connected to the main control module, and the wake-up module is configured to wake up the main control module according to a first water ingress signal of the first electrode or of the second electrode;
• and
• the main control module is configured to control the switch module to be turned on or turned off after being waked up;
• the waterproof detection module is configured to detect whether the battery pack has water ingress after the switch module is turned on and output a second water ingress signal in response to detecting that the battery pack has water ingress;
• the main control module is further configured to control an output circuit of the battery pack to be disconnected according to the second water ingress signal,
• wherein the water ingress detection method comprises:
• after detecting the second water ingress signal, controlling the switch module to be turned on every first preset time until a number of times of turning on the switch module reaches a first preset number of times or no second water ingress signal is detected;
• and
• if the number of times of turning on the switch module reaches the first preset number of times, and the second water ingress signal is detected, controlling the switch module to be turned on every second preset time, and recounting the number of times of turning on the switch module until the number of times of turning on the switch module reaches a second preset number of times or no second water ingress signal is detected, wherein the first preset number of times is larger than the second preset number of times, and the first preset time is shorter than the second preset time.