Sampling detection circuit and method for detecting a circuit malfunction

A method for detecting a circuit malfunction, which is applied to a sampling detection circuit, characterized in that:

• the sampling detection circuit comprises:
• a plurality of energy storage modules, a plurality of equalization modules, and a plurality of first resistance modules,
• wherein one terminal of an energy storage module among the plurality of energy storage modules is connected to one terminal of a battery cell in a battery module, and the other terminal of the energy storage modules is connected to the other terminal of the battery cell,
• wherein one terminal of an corresponding equalization module among the plurality of equalization modules is connected to one terminal of the battery cell, and the other terminal of the corresponding equalization module is connected to the other terminal of the battery cell, and wherein the first resistance module is disposed between the equalization module and the battery cell, and the plurality of equalization modules are sequentially numbered in an arrangement order;
• the method for detecting a circuit malfunction comprises:
• receiving a detection instruction, and controlling, in response to the detection instruction, all of the plurality of equalization modules to be turned off, and collecting first sampled data of sampled equalization modules, wherein the sampled equalization modules comprises one or more of the plurality of equalization modules;
• controlling odd numbered equalization modules among the sampled equalization modules to be turned on and even numbered equalization modules among the sampled equalization modules to be turned off, and collecting second sampled data of the sampled equalization modules;
• controlling the odd numbered equalization modules among the sampled equalization modules to be turned off and the even numbered equalization modules among the sampled equalization modules to be turned on, and collecting third sampled data of the sampled equalization modules;
• and
• determining, according to the first sampled data, the second sampled data and the third sampled data, a malfunction in the sampling detection circuit, and locating the malfunction.