Abstract: A charging method for an electrochemical device includes the following steps: in a first cycle stage, a charging stage of the first cycle stage has a first cut-off current; and in a second cycle stage, a charging stage of the second cycle stage has a second cut-off current, and the second cut-off current is greater than the first cut-off current. According to the charging method for an electrochemical device, an electronic device, and a readable storage medium provided in the present application, the risk of cyclic gas generation of the electrochemical device can be effectively prevented, and the service life of the electrochemical device can be improved.

Abstract: A charging method for an electrochemical device includes the following steps: in a first cycle stage, a charging stage of the first cycle stage has a first cut-off voltage; and in a second cycle stage, a charging stage of the second cycle stage has a second cut-off voltage, and the second cut-off voltage is less than the first cut-off voltage. According to the charging method for an electrochemical device, an electronic device, and a readable storage medium provided in the present application, the risk of cyclic gas generation of the electrochemical device can be effectively prevented, and the service life of the electrochemical device can be improved.

Abstract: A cathode includes a cathode current collector; and a cathode active material layer disposed on a surface of the cathode current collector. The cathode active material layer includes a first particle and a second particle, the first particle including a secondary particle composed of a third particle, the third particle being a primary particle, the first particle having an average particle size of 5 ?m to 20 ?m, the third particle having an average particle size of 200 nm to 700 nm, the second particle including a fourth particle and/or a secondary particle composed of the fourth particle, the fourth particle being a primary particle, the second particle having an average particle size of 3 ?m to 5 ?m, the fourth particle having an average particle size of 800 nm to 5 ?m.

Abstract: A battery module including a battery unit and a conductive unit. The battery unit includes at least one cell, and each cell of the battery unit includes a first tab and a second tab having opposite polarities. The conductive unit includes a first conductive member and a second conductive member spaced apart from the first conductive member in a thickness direction of the cell, the first conductive member is electrically connected with the first tab of any cell, and the second conductive member is electrically connected with the second tab of any cell. The battery module is configured that the first conductive member and the second conductive member are in conductive contact through the swelling of the cell.

Abstract: A battery module includes n batteries, n?3. The n batteries are stacked in a sequence along a thickness direction of the battery, and m is defined as a round number of n/2, and the first battery and the m-th battery satisfy at least one of the following conditions: a1: a capacity of the m-th battery is greater than that of the first battery; b1: under a same state of charge, an open circuit voltage of the m-th battery is less than that of the first battery; and c1 under a same state of charge, an AC impedance of the m-th battery is less than that of the first battery.

Abstract: A charging method for an electrochemical device includes the following steps: in a first cycle stage, a charging stage of the first cycle stage has a first cut-off voltage; and in a second cycle stage, a charging stage of the second cycle stage has a second cut-off voltage, and the second cut-off voltage is less than the first cut-off voltage. According to the charging method for an electrochemical device, an electronic device, and a readable storage medium provided in the present application, the risk of cyclic gas generation of the electrochemical device can be effectively prevented, and the service life of the electrochemical device can be improved.

Abstract: A charging method for an electrochemical device includes the following steps: in a first cycle stage, a charging stage of the first cycle stage has a first cut-off current; and in a second cycle stage, a charging stage of the second cycle stage has a second cut-off current, and the second cut-off current is greater than the first cut-off current. According to the charging method for an electrochemical device, an electronic device, and a readable storage medium provided in the present application, the risk of cyclic gas generation of the electrochemical device can be effectively prevented, and the service life of the electrochemical device can be improved.

Abstract: The present application relates to a cathode and an electrochemical device.