Abstract: A negative electrode plate includes a negative electrode material. The negative electrode material includes a matrix material, and a fast ion conductor is present on a surface of the matrix material. The fast ion conductor is a lithium lanthanum zirconium oxide. Dv50 of the matrix material is D1 ?m, and Dv50 of the fast ion conductor is D2 ?m, where D2/D1?0.1 and 0.05?D2?1.

Abstract: An electrochemical apparatus management method includes: performing a first charge-discharge cycle on an electrochemical apparatus at a charging current; performing an intermittent charging operation on the electrochemical apparatus at a detection current, obtaining data related to the electrochemical apparatus in the intermittent charging operation, and determining a lithium-precipitation state of charge of the electrochemical apparatus based on the data related to the electrochemical apparatus; and in response to the lithium-precipitation state of charge of the electrochemical apparatus being greater than a state-of-charge threshold, performing a second charge-discharge cycle on the electrochemical apparatus at the charging current; or in response to the lithium-precipitation state of charge of the electrochemical apparatus being less than or equal to a state-of-charge threshold, performing a second charge-discharge cycle on the electrochemical apparatus at a target charging current.

Abstract: An electrochemical apparatus management method includes: performing a first charge-discharge cycle on an electrochemical apparatus at a charge current; at a first moment after the first charge-discharge cycle, obtaining an SOH1; in response to the SOH1 satisfying a preset condition, performing an intermittent charge operation on the electrochemical apparatus at a first detection current, obtaining data in the intermittent charge operation, determining a current lithium precipitation SOC1 based on the data; in response to the SOC1 being higher than a first SOC threshold, performing a second charge-discharge cycle on the electrochemical apparatus at the charge current, in response to the SOC1 being lower than or equal to the first SOC threshold and higher than or equal to a second SOC threshold, controlling the electrochemical apparatus to perform a risk control operation, or in response to the SOC1 being lower than the second SOC threshold, controlling the electrochemical apparatus to stop.

Abstract: A management method of an electrochemical device, includes: when the electrochemical device is in a preset state, measuring a predetermined parameter of the electrochemical device, and in response to the predetermined parameter meeting a preset condition, performing at least one discharge-charge operation on the electrochemical device. The discharge-charge operation includes: discharging the electrochemical device to a second voltage threshold, and charging the electrochemical device to a third voltage threshold. The second voltage threshold is less than a first voltage threshold, the first voltage threshold is a limited charge voltage of the electrochemical device, and a difference between the third voltage threshold and the first voltage threshold is not greater than 20%.

Abstract: A battery cell includes an electrode sheet. The electrode sheet includes an electrode sheet body and a plurality of tabs connected to the electrode sheet body. The width of each of the plurality of tabs is different from one another; or the length of each of the plurality of tabs is different from one another. The electrode sheet and the battery cell having the electrode sheet ensures that each of the tabs in the electrode sheet can electrically conduct well with the tab lead. Thus, the battery cell has the advantage of good electrical conductivity.

Abstract: An electrochemical including an electrode assembly. The electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator. The negative electrode plate includes a negative current collector. The negative current collector includes a first part and a second part. A first negative active material layer is disposed on one side of the first part. A second negative active material layer and a third negative active material layer are disposed on two sides of the second part respectively. The positive electrode plate includes a positive current collector. The positive current collector includes a third part and a fourth part. A first positive active material layer is disposed on the third part. A second positive active material layer is disposed on the fourth part.

Abstract: The embodiments of the present application relate to an electrode sheet and a battery cell including the same. The electrode sheet according to an embodiment comprises an electrode sheet body and a plurality of tabs connected to the electrode sheet body. The width of each of the plurality of tabs is different from one another; or the length of each of the plurality of tabs is different from one another. The electrode sheet and the battery cell provided in the embodiments of the present application ensure that each of the tabs in the electrode sheet can electrically conduct well with the tab lead. Thus, the battery cell provided in the present application has the advantage of good electrical conductivity.

Abstract: A battery cell is disclosed having a cathode including a cathode substrate with a surface coating of a first cathode active material in a first cathode region and a second cathode active material in a second cathode region, an anode including an anode substrate having a surface coating of a first anode active material in a first anode region and a second anode active material in a second anode region, wherein a value CB1 is a ratio of a unit area capacity CsA1 of the first anode region to a unit area capacity Csc1 of the first cathode region, a value CB2 is a ratio of a unit area capacity CsA2 of the second anode region to a unit area capacity Csc2 of the second cathode region, wherein the surface coating of the cathode and/or anode is a partitioned coating including different active materials, and wherein CB2?CB1.

Abstract: An electrochemical apparatus includes a positive electrode plate, the positive electrode plate includes a positive electrode active material layer, the positive electrode active material layer includes a positive electrode active material, the positive electrode active material includes a manganese-containing material, and a mass ratio Y of the manganese-containing material to the positive electrode active material ranges from 0.4 to 1. Through control of the mass ratio Y of the manganese-containing material to the positive electrode active material in the positive electrode active material layer, Mn dissolution out of the positive electrode active material layer can be effectively controlled.

Abstract: A lithium secondary battery is disclosed which includes a cathode having a first cathode region and a second cathode region adjacent to the first cathode region, wherein the second cathode region is adjacent to an uncoated region of the cathode substrate; an anode, the anode having a first anode region and a second anode region adjacent to the first anode region, wherein the second anode region is adjacent to an uncoated region of the anode substrate, wherein a value C1 is a ratio of a direct current resistance value RA1 of the first anode region to a direct current resistance value RC1 of the first cathode region; wherein a value C2 is a ratio of a direct current resistance value RA2 of the second anode region to a direct current resistance value RC2 of the second cathode region; and wherein C2<C1.

Abstract: The present application provides an electrochemical device. The electrochemical device, comprising: a positive electrode; a negative electrode; and the separator, disposed between the positive electrode and the negative electrode, wherein the separator comprising a porous substrate, a first coating layer and a second coating layer, the first coating layer and the second coating layer are on a surface of the porous substrate, the first coating layer is disposed on at least one side of the second coating layer, the first coating layer includes a first binder, and the second coating layer includes a second binder, the adhesive force between the first coating layer and the positive electrode or the negative electrode is greater than the adhesive force between the second coating layer and the positive electrode or the negative electrode. The electrochemical device provided by the present application can further improve the cycle performance of the electrochemical device.

Abstract: An electrochemical including an electrode assembly. The electrode assembly includes a negative electrode plate, a positive electrode plate, and a separator. The negative electrode plate includes a negative current collector. The negative current collector includes a first part and a second part. A first negative active material layer is disposed on one side of the first part. A second negative active material layer and a third negative active material layer are disposed on two sides of the second part respectively. The positive electrode plate includes a positive current collector. The positive current collector includes a third part and a fourth part. A first positive active material layer is disposed on the third part. A second positive active material layer is disposed on the fourth part.

Abstract: The present application provides a method of adjusting transmission power of a terminal, a mobile terminal, and a non-transitory storage device, and relate to the field of mobile terminals. The method includes: connecting to an accession point of a wireless network; obtaining a connection state of the terminal connecting to the accession point; calculating a connection evaluation score based on the connection state; obtaining a state of a screen, setting a threshold connection score based on the state of the screen; comparing the connection evaluation score to the threshold connection score; and reducing the transmission power of the terminal connecting to the wireless network in response to the connection evaluation score being greater than the threshold connection score.

Abstract: A method for controlling a smart television is disclosed. The method includes establishing a WiFi Aware connection with a mobile terminal when the smart television receives a subscription request of the mobile terminal; and sending a message by the mobile terminal to the smart television through the WiFi Aware connection to control the smart television.

Abstract: The present application provides an electrochemical device. The electrochemical device, comprising: a positive electrode; a negative electrode; and the separator, disposed between the positive electrode and the negative electrode, wherein the separator comprising a porous substrate, a first coating layer and a second coating layer, the first coating layer and the second coating layer are on a surface of the porous substrate, the first coating layer is disposed on at least one side of the second coating layer, the first coating layer includes a first binder, and the second coating layer includes a second binder, the adhesive force between the first coating layer and the positive electrode or the negative electrode is greater than the adhesive force between the second coating layer and the positive electrode or the negative electrode. The electrochemical device provided by the present application can further improve the cycle performance of the electrochemical device.

Abstract: The embodiments of the present application relate to an electrode sheet and a battery cell including the same. The electrode sheet according to an embodiment comprises an electrode sheet body and a plurality of tabs connected to the electrode sheet body. The width of each of the plurality of tabs is different from one another; or the length of each of the plurality of tabs is different from one another. The electrode sheet and the battery cell provided in the embodiments of the present application ensure that each of the tabs in the electrode sheet can electrically conduct well with the tab lead. Thus, the battery cell provided in the present application has the advantage of good electrical conductivity.

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. The electrode includes a first region and a second region, wherein the electrode includes a substrate and an electrode active material coated on at least one surface of the substrate, and wherein the charge/discharge thickness difference of the electrode in the first region is ?D1, and the charge/discharge thickness difference of the electrode in the second region is ?D2, wherein ?D1 is less than ?D2. When the electrode of the present application is applied to the electrochemical device, the formation of lithium dendrites can be effectively reduced, and the safety of the electrochemical device can be improved.

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. An anode of the present application includes a first anode region and a second anode region, wherein a direct current resistance value RA2 of the second anode region is less than or equal to 98% of a direct current resistance value RA1 of the first anode region. A cathode of the present application includes a first cathode region and a second cathode region, wherein a direct current resistance value RC2 of the second cathode region is greater than a direct current resistance value RC1 of the first cathode region. When the anode and/or the cathode of the present application are/is applied to the electrochemical device, it can effectively reduce the formation of lithium dendrites, thereby improving the safety of the electrochemical device.

Abstract: The present application relates to an electrode and an electrochemical device including the electrode. The anode of the present application includes a first anode region and a second anode region, wherein the unit area capacity CsA2 of the second anode region is greater than or equal to the unit area capacity CsA1 of the first anode region. The cathode of the present application includes a first cathode region and a second cathode region, wherein the unit area capacity CsC2 of the second cathode region is less than or equal to 98% of the unit area capacity CsC1 of the first cathode region. When the anode and/or cathode of the present application are/is applied to an electrochemical device, the formation of lithium dendrites can be effectively reduced, thereby improving the safety of the electrochemical device.

Abstract: The present disclosure discloses a smart power saving method for a terminal. The method may include: acquiring an IP lease duration corresponding to an IP address of a Wi-Fi connection with the terminal; determining whether the IP lease duration is not larger than a preset threshold; determining whether a screen of the terminal is in a screen-off state or whether a CPU of the terminal is in a sleep state; and if the screen of the terminal is in the screen-off state or the CPU of the terminal is in the sleep state, and the IP lease duration is not larger the preset threshold, removing a first lease process.