Abstract: A circuit includes a first connection end, a second connection end, and a circuit protection module. The first connection end is connected to a battery core of a battery, and includes a positive electrode, a first negative electrode, and a second negative electrode. The second connection end is connected to a device outside the battery, and includes a first positive electrode end, a first negative electrode end connected with the first negative electrode to form a first conductive path, a second positive electrode end, and a second negative electrode end connected with the second negative electrode to form a second conductive path. The circuit protection module includes: a first switch circuit connected between the positive electrode and the first positive electrode end; a second switch circuit connected between the positive electrode and the second positive electrode end; and a control circuit turning on/off of the first or second switch circuit.

Abstract: The present disclosure relates to the field of survey and stability evaluation of a tailing fill dam, in particular to a method and system for survey and stability evaluation of an upstream tailing fill dam, wherein the method comprises the following steps: selecting a drill bit and a soil sampler for a target tailing fill dam; collecting tailing sand at different depths of the target tailing fill dam using the drill bit and the soil sampler; detecting an undisturbed soil sample of the tailing sand; setting a preset standard according to the undisturbed soil sample, and screening the tailing sand using the preset standard to obtain a tailing sand sample; detecting the particle composition of the tailing sand sample; detecting the mechanical property of the tailing sand sample; and evaluating the stability of the target tailing fill dam through the particle composition and the mechanical property.

Abstract: A method for preparing granulated creep feed, the method including: 1) uniformly mixing 100 parts by weight of a powder material with between 24 and 30 parts by weight of water to yield a mixture; 2)heating the mixture at a first heating stage to a first temperature of 45-60° C., and maintaining the first temperature for 25-30 s; heating the mixture at a second heating stage to a second temperature of 65-90° C., and maintaining the second temperature for 20-25 s; and heating the mixture at a third heating stage to a third temperature of 95-120° C., and maintaining the third temperature for 15-20 s to yield an aged material; and 3) extruding the aged material into strips by an extruding device, cutting the strips into granules, and dispersing and cooling the granules.