Abstract: A data storing method, a memory storage device, and a memory controller are provided. The method includes: obtaining a plurality of program/erase counts and a plurality of program/erase period values of a plurality of physical erasing units in a storage area; calculating a plurality of data cold and hot degrees according to the plurality of program/erase counts and the plurality of program/erase period values; selecting a first physical erasing unit according to the plurality of data cold and hot degrees, and selecting a second physical erasing unit according to the plurality of data cold and hot degrees; and writing data stored in the first physical erasing unit to the second physical erasing unit.

Abstract: The invention provides a wear leveling method, a memory storage device, and a memory control circuit unit. The method includes: recording wear count values respectively corresponding to a plurality of physical units; obtaining a total of a plurality of first physical units, wherein a first wear count value corresponding to each of the first physical units meets a first condition; triggering a wear leveling operation in response to the total meeting a second condition; and in the wear leveling operation, moving valid data in at least one second physical unit to at least one of the plurality of first physical units. As a result, the wear leveling operation performed on the rewritable non-volatile memory module may be optimized.

Abstract: Disclosed are a positive electrode plate and a lithium-ion battery including the same. The positive plate includes a positive electrode current collector and a positive electrode coating layer; and the positive electrode coating layer includes a first coating layer and a second coating layer, wherein the first coating layer is coated on the positive electrode current collector surface, and the second coating layer is coated on the first coating layer surface. The lithium-ion battery has a good safety performance, and when mechanical misuse (needling, weight impact) occurs, the probability of battery fire failure is significantly reduced.

Abstract: A voltage adjustment method, a memory storage device and a memory control circuit unit are disclosed. The method includes: reading a first physical unit among the physical units based on a first read voltage to obtain a first count value, wherein the first count value reflects a total number of memory cells each having a threshold voltage lower than the first read voltage; obtaining a second count value based on a difference between the first count value and a first default value; bringing the second count value into a target formula to obtain a voltage adjustment parameter; adjusting the first read voltage to a second read voltage according to the voltage adjustment parameter; and reading the first physical unit based on the second read voltage.

Abstract: Disclosed is a lithium ion battery. The lithium ion battery includes a positive electrode plate, a negative electrode plate and a separator. The positive electrode plate, the separator and the negative electrode plate are stacked successively and then wound from inside to outside. The positive electrode plate includes a positive electrode current collector. At least one functional surface of the positive electrode current collector is provided with a protective layer. A surface of the protective layer away from the positive electrode current collector is provided with a positive electrode active layer. A length of the protective layer is greater than a length of the positive electrode active layer in a winding direction of the positive electrode current collector. According to the present application, by increasing a protection area of the protective layer for a positive electrode current collector, safety performance of the lithium ion battery is improved.

Abstract: Disclosed are an electrode assembly and a battery. The electrode assembly includes a positive electrode plate formed through winding, where the positive electrode plate includes a positive electrode current collector, a first protective layer, and a positive electrode active material layer. The positive electrode current collector includes a first surface close to a winding center and a second surface away from the winding center. The second surface includes a first region and a second region. The first surface and the first region are provided with the first protective layer and the positive electrode active material layer, and the first protective layer is located between the positive electrode active material layer and the positive electrode current collector. The second region is provided with the first protective layer. The first protective layer includes a conductive material and a first binder.

Abstract: Provided are an electrode assembly and a battery. The electrode assembly includes a positive electrode piece formed by winding, including a positive electrode current collector and a functional layer, where the positive electrode current collector includes a first surface and a second surface which are parallel and opposite to each other, and the first and second surfaces of the positive electrode current collector are each provided with a functional layer; a length of the functional layer is the same as that of the positive electrode current collector; the functional layer includes a positive electrode active material layer, and a protective layer which is arranged between the positive electrode current collector and the positive electrode active material layer, and a length of the protective layer is smaller than or equal to that of the positive electrode active material layer; the protective layer includes a conductive material and a binder.

Abstract: Disclosed are an electrode plate and a battery. The electrode plate includes a current collector, a tab, and an adhesive paper; the tab is disposed in the tab welding region the electrode plate is divided into a plurality of planar regions and curved surface regions that are alternately disposed; the adhesive paper covers the tab welding region, partially covers a planar region, crosses over an adjacent curved surface region on one side, and partially covers an adjacent planar region; and a projection of the adhesive paper on the adjacent planar region has a dimension L1, and 0<L1?10 mm. The electrode plate in the present disclosure can solve a problem of poor flatness near a tab, and can solve a lithium deposition problem caused by the poor flatness near the tab.

Abstract: The present application provides a laminated battery cell and a lithium-ion battery, where the laminated battery cell includes an electrode sheet assembly and a protection assembly, where the protection assembly is located on the surface of the outer electrode sheet of the electrode sheet assembly; the electrode sheet assembly includes at least one functional electrode sheet, which includes a first current collector, a first protective layer and a first active layer, the first protective layer being located between the first current collector and the first active layer; the protection assembly includes a second current collector and a second protective layer that is away from the electrode sheet assembly; the first protective layer and the second protective layer each independently include a conductive particle and a binder, preventing the lithium-ion battery from internal short circuit during mechanical abuse, and making the lithium-ion battery has excellent safety performance.

Abstract: A positive electrode plate includes a positive electrode active layer, and a protective electrode protective layer arranged between a positive electrode current collector and the positive electrode active layer; the positive electrode protective layer includes conductive particles and a binder; and the conductive particles are an inorganic filler with a conductive coating layer on a surface. The positive electrode protective layer is arranged to avoid a contact-type short circuit between the positive electrode current collector and a negative electrode active layer when a lithium-ion battery is mechanically abused. In addition, there is a wide conductive network in the positive electrode protective layer, so the lithium-ion battery has excellent safety performance and cycling performance.

Abstract: A laser wireless power transmission device and method based on power acquisition on power line. The device includes a power transmitter and a power receiver both installed on a power transmission line. The power transmitter includes an online induction power acquisition module, a semiconductor laser, a communication module, a two-dimensional pan-tilt, a beam shaping module, a control unit, a video image module, and an IMU module. The power receiver includes a four-quadrant photovoltaic panel, a DCDC module, a wireless monitoring module, and a battery.

Abstract: A winding battery includes a positive electrode plate and a negative electrode plate which are formed by winding, the positive electrode plate includes a positive electrode current collector and a first coating layer, and the negative electrode plate includes a negative electrode current collector and a negative electrode active layer. The first coating layer includes a first insulating adhesive layer and a positive electrode active layer, the positive electrode active layer is disposed on a surface of the positive electrode current collector, the first insulating adhesive layer is connected to the positive electrode active layer, and at least one cross section of the first insulating adhesive layer and an end surface, close to a winding start point, of the negative electrode active layer are located in a same plane.

Abstract: A negative electrode sheet, including a negative current collector, where a first negative electrode film layer is attached to a surface of the negative current collector, and an active substance of the first negative electrode film layer includes silicon particles and first graphite particles; a second negative electrode film layer is attached to a surface of the first negative electrode film layer, and an active substance of the second negative electrode film layer includes second graphite particles. That is, a negative electrode film layer is divided into two layers, such that when lithium-ions move to the negative electrode sheet, part of lithium-ions are first embedded into the second negative electrode film layer, and the remaining lithium-ions are embedded into the first negative electrode film layer.

Abstract: A negative electrode sheet, including a negative current collector, where a first negative electrode film layer is attached to a surface of the negative current collector, and an active substance of the first negative electrode film layer includes silicon particles and hard carbon particles; a second negative electrode film layer is attached to a surface of the first negative electrode film layer, and an active substance of the second negative electrode film layer includes graphite particles, such that when lithium-ions move to the negative electrode sheet, part of lithium-ions are first embedded into the second negative electrode film layer, and the remaining lithium-ions are embedded into the first negative electrode film layer.

Abstract: A memory management method for a memory storage device is provided. The memory management method includes: detecting effective information of at least one operation event performed by the memory storage device in a first mode; and adjusting a threshold value according to the effective information. The threshold value is configured to determine whether to instruct the memory storage device to enter the first mode.

Abstract: This application provides an electrode sheet and an electrochemical device. The electrode sheet includes a current collector and a functional coating located on at least one surface of the current collector. The functional coating includes a first coating, a second coating and an active material layer that are sequentially stacked on a surface of the current collector. The first coating includes a conductive agent, a binder and a first functional filler, and the second coating includes a conductive agent, a binder and a second functional filler. A mass ratio of the binder in the first coating to the first coating is a1, a mass ratio of the binder in the second coating to the second coating is a2, and a mass ratio of the binder in the active material layer to the active material layer is a3, and a1>a2>a3.

Abstract: The present application provides a rolled core and a battery, where the rolled core includes a positive electrode piece having a paste-removal portion of positive electrode piece, and a negative electrode piece including a negative current collector, a negative active material layer, and a gap filling body; the paste-removal portion of positive electrode piece is a missing part of the positive electrode piece relative to the negative electrode piece at a winding-start end of the rolled core; the negative current collector includes a first side and a second side which are opposite to each other, and at least one of the first side and the second side is provided with a negative active material layer; the gap filling body is arranged on one of the first side and the second side at a position corresponding to the winding-start end of the rolled core.

Abstract: Disclosed are a battery and an electronic device, where the battery includes a first electrode plate, a second electrode plate, a control unit, and a first tab and a second tab that are connected to the first electrode plate, and the first electrode plate and the second electrode plate have opposite polarities. The control unit includes a heating control circuit, and in a case that the battery is connected to an external power supply, the heating control circuit is configured to: when a battery temperature of the battery is less than a first temperature threshold, conduct the first tab, the first electrode plate, and the second tab to heat the battery. A charging speed of the battery at a low temperature may be improved, and lithium deposition and capacity fading of the battery may be slowed down.

Abstract: This application provides an electrode sheet and an electrochemical device. The electrode sheet includes a substrate. The substrate includes a current collector and a protective layer provided on a surface of the current collector. An active material layer is further provided on the protective layer. The protective layer includes a non-active material including an inorganic material. The inorganic material has a weight loss rate of a measured by a thermogravimetric analysis, where 0.1%?a?10%, a=(m0?m1)/m0, m0 is a mass of the inorganic material before the thermogravimetric analysis, and m1 is a mass of the inorganic material after the thermogravimetric analysis. The mass after the thermogravimetric analysis is a mass of the inorganic material when its temperature is raised from 25±5° C. to 900±20° C. at a heating rate of 20±2° C./min under an inert atmosphere.

Abstract: An electrode piece, a rolled core and a battery, where the electrode piece includes a current collector and an active substance layer; the electrode piece has a single-sided area and a double-sided area, the single-sided area is located on a side of the electrode piece along a length direction thereof, a surface of one side of the current collector in the single-sided area is covered with the active substance layer, while surfaces of both sides of the current collector in the double-sided area are covered with the active substance layer; and multiple tabs protrude from one side of the electrode piece along a width direction thereof, and are spaced apart; in the single-sided area, an anti-rolling strip is provided on a surface of a side of the current collector not covered by the active substance layer, and is disposed on the same side as the tabs.