A rechargeable battery monitoring system, comprising several cell monitoring circuits, CMCs, a battery management unit, BMU, and a first bus, wherein a rechargeable battery comprises several electrically connected battery modules, each CMC is connected to the first bus and configured to monitor at least one battery module; the BMU is connected to the first bus and configured to communicate with at least one CMC, wherein, among the several CMCs, a CMC communicating with the BMU is referred to as a head module; the rechargeable battery monitoring system further comprises several pull-up and pull-down modules; and the pull-up and pull-down modules are disposed on a communication path between two adjacent CMCs, and the communication path between two adjacent CMCs comprises the first bus located between the two adjacent CMCs; wherein the pull-up module comprises a pull-up circuit and the pull-down module comprises a pull-down circuit; the pull-up circuit is a pull-up resistor circuit and the pull-down circuit is a pull-down resistor circuit, wherein: the resistance value of the resistor in the pull-up resistor circuit, is set considering both power consumption of the pull-up resistor circuit and driving capability of the pull-up resistor circuit the resistance value of the resistor in the pull-down resistor circuit is not in the same order of magnitude as the resistance value of the resistor in the pull-up resistor circuit, and the resistance value of the resistor in the pull-down resistor circuit is larger than the resistance value of the resistor in the pull-up resistor circuit; a first end of the pull-down circuit is connected to the communication path, and a second end of the pull-down circuit is connected to a low-potential end of a receiver to which the communication path is directed; a first end of the pull-up circuit is connected to the communication path, and a second end of the pull-up circuit is configured to receive a preset supply voltage, and the supply voltage is higher than a voltage of the low-potential end; and in a case that the communication path is a communication path between two adjacent CMCs, the receiver is one of the two adjacent CMCs, and, in a case that the communication path is a communication path between the head module and the BMU, the receiver is either the head module or the BMU. wherein the pull-up module comprises a pull-up circuit and the pull-down module comprises a pull-down circuit; the pull-up circuit is a pull-up resistor circuit and the pull-down circuit is a pull-down resistor circuit, wherein: the resistance value of the resistor in the pull-up resistor circuit, is set considering both power consumption of the pull-up resistor circuit and driving capability of the pull-up resistor circuit the resistance value of the resistor in the pull-down resistor circuit is not in the same order of magnitude as the resistance value of the resistor in the pull-up resistor circuit, and the resistance value of the resistor in the pull-down resistor circuit is larger than the resistance value of the resistor in the pull-up resistor circuit; a first end of the pull-down circuit is connected to the communication path, and a second end of the pull-down circuit is connected to a low-potential end of a receiver to which the communication path is directed; a first end of the pull-up circuit is connected to the communication path, and a second end of the pull-up circuit is configured to receive a preset supply voltage, and the supply voltage is higher than a voltage of the low-potential end; and in a case that the communication path is a communication path between two adjacent CMCs, the receiver is one of the two adjacent CMCs, and, in a case that the communication path is a communication path between the head module and the BMU, the receiver is either the head module or the BMU. the resistance value of the resistor in the pull-up resistor circuit, is set considering both power consumption of the pull-up resistor circuit and driving capability of the pull-up resistor circuit the resistance value of the resistor in the pull-down resistor circuit is not in the same order of magnitude as the resistance value of the resistor in the pull-up resistor circuit, and the resistance value of the resistor in the pull-down resistor circuit is larger than the resistance value of the resistor in the pull-up resistor circuit; a first end of the pull-down circuit is connected to the communication path, and a second end of the pull-down circuit is connected to a low-potential end of a receiver to which the communication path is directed; a first end of the pull-up circuit is connected to the communication path, and a second end of the pull-up circuit is configured to receive a preset supply voltage, and the supply voltage is higher than a voltage of the low-potential end; and in a case that the communication path is a communication path between two adjacent CMCs, the receiver is one of the two adjacent CMCs, and, in a case that the communication path is a communication path between the head module and the BMU, the receiver is either the head module or the BMU.