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: 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: An electrode plate for a lithium battery includes a composite current collector, a first active material layer, and a first electrode tab. The composite current collector includes a polymer layer and first metallic layer thereon. The first active material layer is disposed on a surface of the first metallic layer facing away from the polymer layer. The first active material layer defines a first receiving groove at an edge of the first active material layer. The first electrode tab is received in the first receiving groove, and is electrically connected to the first metallic layer. The thickness of the first electrode tab can be varied according to the electrical resistance desired. Thus, a high resistance of the first electrode tab is avoided.

Abstract: A battery includes an electrode assembly and a housing. The electrode assembly includes a first electrode plate, a second electrode plate, and a separator. The housing includes a curved surface and a plurality of side walls, the housing further includes a concave part accommodating the electrode assembly, the plurality of side walls enclose to form the concave part, and any three adjacent side walls are connected through the curved surface to form a junction. The three adjacent side walls include a first side wall formed by a main plane parallel to the first direction, a second side wall disposed parallel to the first direction and at an angle to the first side wall, and a third side wall disposed at an angle to the first direction.

Abstract: An electrochemical apparatus, including two electrode assemblies and a packaging shell, where the two electrode assemblies are respectively disposed in independent cavities in the packaging shell; each electrode assembly includes two tabs with opposite polarities, where at least one tab of one electrode assembly is connected to one of two tabs of the other electrode assembly, and orthographic projections of the two connected tabs along a seal thickness direction Z overlap to form a tab overlapping region; and a ratio ? of an overlapping width of the two connected tabs along a seal length direction X at an outer edge of a seal of the packaging shell viewed along the seal thickness direction Z to a width of either of the two connected tabs satisfies 40%<??100%. The electrochemical apparatus not only implements high-voltage output, but also improves packaging reliability of a tab region during the high-voltage output.

Abstract: A current collector, an electrochemical device containing the current collector, and an electronic device. The current collector includes a polymer substrate material and a conductive material. An electron resistivity of the current collector in an X-Y in-plane direction is 10 ?·cm to 1000 ?·cm, and an electron resistivity of the current collector in a Z direction is 0.01 ?·cm to 30 ?·cm. The current collector according to this application is excellent in oxidation resistance, reduction resistance, ionic insulation, mechanical strength, thermal stability, increases the energy density of bipolar electrochemical devices, and is more cost-effective and more suitable for mass production.

Abstract: An electrochemical device includes: an electrode assembly and a first adhesive tape. The electrode assembly includes a body portion and a first metal portion. The body portion includes a first part and a second part, the first part is electrically connected to the first metal portion. A junction between the first part and the first metal portion in the first direction is a first boundary line, and a junction between the first part and the second part is a second boundary line. The first adhesive tape includes a first tape edge. The first adhesive tape is disposed on the first surface and the third surface. Viewed from a direction perpendicular to the first surface, the first tape edge is located between the first boundary line and the second boundary line.

Abstract: A partition plate includes a partition substrate, a positive electrode membrane, a negative electrode membrane, and an insulation layer. The positive electrode membrane and the negative electrode membrane are respectively located on two surfaces of the partition substrate. The insulation layer is disposed on the partition substrate and the insulation layer is disposed at a periphery of the positive electrode membrane. A zone surrounded by orthographic projection of an outer edge of the insulation layer on the partition substrate covers orthographic projection of the negative electrode membrane on the partition substrate. This application can improve self-discharge and safety performances of electrochemical apparatuses.

Abstract: An electrochemical device which includes an electrode plate and a porous layer formed on a surface of the electrode plate. The porous layer includes nanofibers and inorganic particles. The nanofibers and the inorganic particles are bonded together by a crosslinker. In addition, an electronic device, which includes this electrochemical device.

Abstract: An electrode assembly includes an electrode subassembly forming by winding a first electrode plate and a second electrode plate. The first electrode plate includes a first electrode plate unit. The first electrode plate unit includes a bipolar current collector, a first active layer, and a second active layer. The bipolar current collector is disposed between the first active layer and the second active layer. The first active layer is electrically connected to the second active layer. The second electrode plate includes a composite current collector, a third active layer, and a fourth active layer. The composite current collector is disposed between the third active layer and the fourth active layer. The third active layer is electrically insulated from the fourth active layer. The disclosure further provides a battery including the electrode assembly.

Abstract: A secondary battery is provided. The secondary battery includes a cathode; an anode; and an electrolytic solution including a cyano compound.

Abstract: An electrochemical device includes a first electrode assembly, a second electrode assembly, and a packaging shell. The first electrode assembly and the second electrode assembly B are each located in a separate cavity in the packaging shell. Two opposite-polarity tabs of the first electrode assembly and the second electrode assembly are connected in the packaging shell. The connected two opposite-polarity tabs comprise a first tab extending out of the packaging shell. Such design of extending the tabs and the design of ion insulation between the hermetic cavities improve the charge and discharge performance and the product quality of the electrochemical device.

Abstract: An electrochemical apparatus includes a barrier, where the barrier is hermetically connected to an outer package, standalone chambers are formed at two sides of the barrier respectively, each chamber encapsulates an electrode assembly and an electrolyte, electrode assemblies in adjacent chambers are connected in series by tabs, and the barrier includes an ion insulating layer, water permeability of the barrier is less than or equal to 10?3 g/(day·m2·Pa)/3 mm, and sealing thickness T and sealing width W of a seal between the barrier and the outer package satisfy 0.01?T/W?0.05. Based on the electrochemical apparatus, not only high voltage output can be achieved and a temperature rise of the electrochemical apparatus can be reduced, but also water resistance and environmental stability of the electrochemical apparatus can be improved.

Abstract: A partition plate for use in an electrochemical device, an electrochemical device, and an electronic device are disclosed. The partition plate for use in an electrochemical device is ion-insulative and includes an intermediate layer and a sealing layer. The sealing layer is located on an upper surface and a lower surface of the intermediate layer. A material of the intermediate layer includes at least one of a carbon material, a first polymer material, or a metal material. A material of the sealing layer includes a second polymer material. A temperature at which the sealing layer starts to soften is at least 10° C. lower than a temperature at which the intermediate layer starts to soften. Three layers of superimposed composite films ensure ion insulation and sealing reliability.

Abstract: A composite electrode plate of increased robustness and with better electrical properties for incorporation in a battery cell includes a composite current collector, a positive active material layer, a negative active material layer, a first isolation layer, and a second isolation layer. The composite current collector is disposed between the positive active material layer and the negative active material layer. The first isolation layer connects to a surface of the positive active material layer away from the composite current collector. The second isolation layer connects to a surface of the negative active material layer away from the composite current collector.

Abstract: An electrode assembly includes a cathode electrode plate, an anode electrode plate, and a separator disposed between the cathode electrode plate and the anode electrode plate. At least one of the cathode electrode plate and the anode electrode plate is an electrode plate which includes a current collector and a first conductive connector. The current collector includes an insulating layer having opposite side surfaces, a first conductive layer, a second conductive layer, and two electrode active substance layers. The first conductive layer and the second conductive layer are arranged on opposite side surfaces, and the two electrode active substance layers are coated onto the first conductive layer and the second conductive layer. The first conductive connector electrically connects the first conductive layer and the second conductive layer. The electrode assembly is formed by coiling the cathode electrode plate, the separator, and the anode electrode plate.

Abstract: The present application relates to an anode, and an electrochemical device and an electronic device comprising the same. Embodiments of the present application provided an anode comprising: a current collector, a first anode structure layer and a second anode structure layer. The first anode structure layer comprises a first framework material and the second anode structure layer comprises a second framework material, wherein the first anode structure layer is disposed between the current collector and the second anode structure layer, and the first framework material has a higher oxidation-reduction potential for lithium ion or electronic conductivity than the second framework material.

Abstract: The present application relates to a composite current collector, and a composite electrode and an electrochemical device comprising the same. The composite current collector of the present application comprises an intermediate layer, a first metal layer, a second metal layer, and a through hole. The intermediate layer has a first surface and a second surface opposite to the first surface, the first metal layer is disposed on the first surface, and the second metal layer is disposed on the second surface. The through hole penetrates through the intermediate layer, the first metal layer and the second metal layer, wherein the through hole is filled with an electrically insulated ionic conductor.

Abstract: A battery cell includes at least one electrode plate. The electrode plate includes a composite current collector having an ionic conductive material and two active material layers disposed on the composite current collector. The active material layers include a positive active material layer and a negative active material layer. The composite current collector is disposed between the positive active material layer and the negative active material layer. Each of the positive active material layer and the negative active material layer is connected to the ionic conductive material. The battery cell is a multilayered structure formed by folding a single electrode plate upon itself or by stacking the electrode plates together, adjacent active material layers in two adjacent layers of the battery cell are of a same polarity. A battery using the battery cell is also provided.

Abstract: A current collector with electrode tab areas of reduced resistance includes a polymer layer and a first metal layer. The polymer layer includes a first surface and a second surface opposite to the first surface. The first metal layer is arranged on the first surface, and includes a first area and a second area coupled to the first area. In the direction of a thickness of the current collector, the thickness of the second area is greater than that of the first area. The present disclosure further provides an electrode plate and a battery cell using the current collector. Due to an increase of a thickness of the second area, a charge transfer resistance of the electrode tab is greatly reduced.