Abstract: The present disclosure provides a curvature determination method, a curved display panel, and a display device. The curvature determination method includes: establishing a first association relationship between deflection and a shear stress of the curved display panel in a first direction, the first direction being a bending direction of the curved display panel; determining a constraint condition for the shear stress in accordance with an influence of the shear stress on a light leakage of the curved display panel; and generating a curvature change relationship of the curved display panel in the first direction in accordance with the first association relationship when the constraint condition has been satisfied.

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

Abstract: The present disclosure relates to the field of battery state monitoring technologies, and in particular, to a battery state monitoring method and apparatus. The method is: monitoring a voltage value and a current value of an output end of a battery; determining a battery impedance value based on the voltage value; calculating an impedance voltage-drop value based on the current value and the battery impedance value; calculating an open circuit voltage of the battery based on the voltage value and the impedance voltage-drop value; when a difference of the open circuit voltage between two consecutive calculations is greater than or equal to a threshold, judging that the battery state is abnormal; and when the difference of the open circuit voltage between two consecutive calculations is determined to be lower than the threshold, updating the battery impedance value based on the voltage value and the current value.

Abstract: An electrode plate includes a current collector and an active layer formed on the current collector. The current collector includes a first end portion and a second end portion facing away from the first end portion along a length direction. The active layer comprises an active material, an amount of the active material in the active layer increases from the first end portion toward the second end portion along the length direction. The disclosure also provides a battery using the electrode plate.

Abstract: The present disclosure relates to the field of battery state monitoring technologies, and in particular, to a battery state monitoring method and apparatus. The method is: monitoring a voltage value and a current value of an output end of a battery; determining a battery impedance value based on the voltage value; calculating an impedance voltage-drop value based on the current value and the battery impedance value; calculating an open circuit voltage of the battery based on the voltage value and the impedance voltage-drop value; when a difference of the open circuit voltage between two consecutive calculations is greater than or equal to a threshold, judging that the battery state is abnormal; and when the difference of the open circuit voltage between two consecutive calculations is determined to be lower than the threshold, updating the battery impedance value based on the voltage value and the current value.

Abstract: A preparation method of lipid bubbles by utilizing the principle of natural adsorption and assembly of amphiphilic lipid molecules on a gas-liquid interface comprises the steps of mixing gas-dissolved water containing free bubbles with lipid materials, and then the lipid materials are dispersed in the free gas nanobubble aqueous solution, and, in the presence of free bubbles, adsorbed and assembled on the gas-liquid interfaces so as to form lipid bubbles. The method is different from the traditional ultrasound cavitation, the mechanical force action, the novel ink jet printing method, the microchannel method and other methods for preparing bubbles.