Abstract: Disclosed is a secondary battery, comprising an electrode component, a case, a top cover component and a first insulating tape. The electrode component includes a first electrode unit. The first electrode unit is wound into a flat structure and has a first termination line formed at a winding tail-end; a negative plate of an outermost circle of the first electrode unit is located outside a positive plate of an outermost circle; and the first insulating tape at least covers a portion of the first termination line. A surface of the first electrode unit includes a first flat surface; the first flat surface is located at one end of the first electrode unit that is close to the first side wall in the thickness direction; and the first insulating tape is at least partially in close contact with the first flat surface.

Abstract: The present disclosure relates to the technical field of energy storage devices, and in particular, to a battery module. The battery module includes a set of batteries, a case receiving the set of batteries, and a sampling unit for collecting a voltage signal and a temperature signal of the set of batteries. The sampling unit is provided with a connector, and a stopper for fixing the connector is formed on the case. By forming the stopper on the case, the connector can be directly assembled to the stopper during assembling process of the set of batteries without the need to fix the connector by glue or bolt connection. Therefore, not only an assembling process is simplified, but also the connector is not easily damaged during the assembling process.

Abstract: The present disclosure provides a secondary battery, which includes an electrode assembly, a case, a cap assembly and a first insulating tape. The electrode assembly comprises an electrode unit. The electrode unit comprises a positive electrode plate, a negative electrode plate and a separator. The electrode unit is a winding structure and in a flat shape, and an outermost turn of the negative electrode plate is positioned at an outer side of an outermost turn of the positive electrode plate. The case comprises a first side wall and an accommodating cavity, the electrode assembly is accommodated in the accommodating cavity, the case is electrically connected with the positive electrode plate, and the cap assembly is connected with the case. The first insulating tape is positioned between the electrode assembly and the first side wall and closely attached to an outer surface of the electrode assembly.

Abstract: The disclosure relates to a battery lower casing and a battery system. The battery lower casing comprises: a support frame comprising a plurality of fixing beams that are connected end to end to form an accommodating space, wherein each of two fixing beams opposite to each other comprises a fixing portion extending toward the accommodating space, each of the fixing beams comprises fixing tabs at a side of the fixing beam away from the accommodating space, and the battery lower casing is connected to a target object through the fixing tabs; and a bottom plate connected to the fixing beams. The battery lower casing according to the disclosure carries weight of the battery module through the fixing portions of the support frame, and fixes the battery module to the vehicle through the fixing tabs. The bottom plate is only used to isolate the external environment. Therefore, the weight and manufacturing cost of the battery lower casing can be minimized.

Abstract: The present disclosure relates to the technical field of energy storage devices, and particularly, to a battery module. The battery module includes a lower case, a plurality of battery cells sequentially stacked and received in the lower case, and a heat conducting plate. The lower case is provided with an engaging groove, the heat conducting plate is provided with an inserted portion, and the inserted portion is inserted and fitted in the engaging groove. In the battery module according to the present disclosure, through a fitting insertion of the inserted portion in the engaging groove, a stable connection structure can be formed between the heat conducting plate and the lower case, thereby ensuring the structural stability of the battery module.

Abstract: The disclosure provides a battery module, including: two or more battery units, wherein each battery unit includes a battery core including two end portions opposed in a length direction thereof, and the two or more battery units are arranged side by side in a thickness direction of the battery core, in two adjacent battery units, a first gap is formed between two battery cores that are close to each other, and the first gap extends from one of the two end portions along the length direction, and in a direction from the two end portions to a center of the battery core, a dimension of the first gap gradually decreases along the thickness direction; and a cushion pad which is provided between the two adjacent battery units, and the cushion pad is disposed in the first gap and is in contact with the end portion(s) of the battery core.

Abstract: The disclosure relates to a battery lower casing and a battery system. The battery lower casing includes: a bottom plate; a plurality of fixing beams sequentially connected end to end and fixed to the bottom plate; a cross beam disposed between the oppositely disposed fixing beams; and a supporting bracket including a base plate and limiting portions, wherein the limiting portions are connected to the base plate and disposed opposite to each other, the base plate and the oppositely disposed limiting portions enclose and form a recess, the base plate is connected to the fixing beam and an end portion of the cross beam adjacent to the fixing beam is embedded in the recess such that the cross beam is connected to the fixing beam.

Abstract: The present disclosure relates to a battery pack comprising: a module assembly comprising two or more battery modules, wherein each of the battery modules comprises a battery core and an end plate, a plurality of battery cores are arranged side by side along a length direction of the battery pack, the end plate is located on at least one side of the plurality of battery cores in the length direction, and the two or more battery modules are arranged side by side along a width direction of the battery pack; and a limiting plate disposed on at least one side of the module assembly in the length direction and correspondingly to the end plate, wherein the limiting plate comprises an inner side surface towards the end plate.

Abstract: The disclosure relates to a secondary battery including: a cap assembly including a cap plate including an electrode lead-out hole and an electrode terminal disposed on the cap plate; a current collector including a main body located at a side of the cap plate and an extending portion extending toward the electrode terminal, where the extending portion includes a top plate connected to the electrode terminal and a side plate connected to the main body, and the side plate and the top plate are configured to form a recess; and an insulating protection component including a column portion disposed in the recess, where surfaces of the side plate and the top plate which form the recess are in contact with the column portion and covered by the column portion.

Abstract: The present disclosure relates to a secondary battery and a battery pack, and the secondary battery includes: an outer casing, comprising a case and a cap assembly connected to each other, the case is provided with an opening, the cap assembly includes a cap plate and an electrode terminal connected to the cap plate, wherein the cap plate is adapted to cover the opening; an electrode assembly accommodated in the case and including a main body and a tab extending out from the main body, wherein the tab is electrically connected to the electrode terminal; a vent connected to the outer casing; and an insulating member at least partially disposed between the electrode assembly and the vent, wherein a projection of the vent on the main body is at least partially covered by the insulating member.

Abstract: The present disclosure provides a battery pack including a mounting beam and a battery module connected to the mounting beam. The mounting beam is provided with a limiting protrusion and a limiting recess, and a limiting space is formed between the limiting protrusion and the mounting beam. The battery module is provided with a limiting sheet and an engaging assembly, at least a portion of the limiting sheet is inserted into the limiting space, and the engaging assembly is engaged with the limiting recess. In the battery pack according to the present disclosure, the cooperation between the limiting protrusion and the limiting sheet as well as the cooperation between the engaging assembly and the limiting recess can limit the battery module in directions X, Y and Z, thereby effectively fixing the battery module, simplifying the mounting process, and improving the mounting efficiency.

Abstract: The disclosure relates to a battery lower casing and a battery system. The battery lower casing includes: a bottom plate; a plurality of fixing beams sequentially connected end to end and fixed to the bottom plate; a cross beam disposed between the oppositely disposed fixing beams; and a supporting bracket including a base plate and limiting portions, wherein the limiting portions are connected to the base plate and disposed opposite to each other, the base plate and the oppositely disposed limiting portions enclose and form a recess, the base plate is connected to the fixing beam and an end portion of the cross beam adjacent to the fixing beam is embedded in the recess such that the cross beam is connected to the fixing beam.

Abstract: The disclosure relates to a secondary battery comprising: a cap assembly comprising a cap plate comprising an electrode lead-out hole and an electrode terminal disposed on the cap plate and covering the electrode lead-out hole; a current collector comprising a main body located at a side of the cap plate and an extending portion extending toward the electrode terminal, wherein the extending portion comprises a top plate connected to the electrode terminal and a side plate connected to the main body, the side plate is at least partially disposed in the electrode lead-out hole, and the side plate and the top plate are configured to form a recess; and an insulating protection component comprising a column portion disposed in the recess, wherein surfaces of the side plate and the top plate which form the recess are in contact with the column portion and covered by the column portion.

Abstract: The present application relates to an active equalization method and system of a lithium iron phosphate (LFP) battery pack.

Abstract: A lithium ion battery electrolyte, comprises lithium salt, a non-aqueous organic solvent and additives. The additives comprise an SEI film forming additive and furil and derivatives thereof, and the SEI film forming additive is at least one of vinylene carbonate, fluoroethylene carbonate and vinyl ethylene carbonate. Compared with the prior art, furil and derivatives thereof are added to the electrolyte as electrolyte additives in the present invention, to enhance the permeability for separator and the wettability for positive/negative electrode materials, facilitate the film forming reaction of the SEI film forming additive, and further improve the cycling performance of the lithium ion battery using the electrolyte. Furthermore, the furil and derivatives thereof have good chemical and electrochemical stability and free from decomposition reaction within the operating voltage range of the lithium ion battery, thereby imparting no negative effect upon battery performances.

Abstract: A device for connecting tabs of battery cells includes an isolation board defining a first through slot seated on the surfaces of the battery cells from which the tabs extending out; a metal plate mounted on a surface of the isolation board afar from the battery cells, the metal plate defining a second through slot corresponding to the first through slot of the isolation board; and a metal conductive plate secured to the metal plate. The tabs of the battery cells extending through the first through slot and the second through slot are bent and seated on a surface of the metal plate afar from the isolation board, and the metal conductive plate is detachably fastened to the metal plate so that the tabs of the battery cells are securely sandwiched between the metal plate and the metal conductive plate.

Abstract: One aspect of the present disclosure is directed to a connector. The connector includes a top cover, a connecting plate, and a base. The top cover includes a top cover body and a first arc member. A first end of the first arc member is arranged on a side surface of the top cover body. A removable thin plate is arranged inside the first arc member. The connecting plate includes a connection section and a protruding section. The top cover body and the base are engaged and connected to form a cavity. The connection section is arranged inside the cavity. The connection section is connected to the base. A first end of the protruding section is connected to the connection section and a second end of the protruding section protrudes from the base.

Abstract: The present application provides a positive electrode material, a method for preparing the same and a Li-ion battery containing the positive electrode material, wherein, the positive electrode material is represented as Li1+xNiaCobMncMdO2, in which M is selected from one or more of Mg, Ti, Zn, Zr, Al and Nb. The positive electrode material provided by the present application has a small crystal volume and a small Li—Ni synchysis degree. In addition, after the positive electrode material provided by the present application is applied to a Li-ion battery, the Li-ion battery possesses a better cycle performance, a higher initial charge-discharge efficiency and a better power property. Moreover, in the present application, a precursor is prepared by a coprecipitation method, and then the precursor is sintered together with a Li source and a metal oxide to obtain the positive electrode material.

Abstract: A power battery cap structure and a power battery are provided in the present invention. The power battery cap structure includes a first terminal, a second terminal and a cap assembly; both the first terminal and the second terminal are provided on the cap assembly, and the second terminal is electrically insulated from the cap assembly. The power battery cap structure further includes a resistance attached to the first terminal and electrically connected the first terminal with the cap assembly. The cap assembly includes a cap sheet, a first short circuit part and a second short circuit part; the first short circuit part and the second short circuit part are attached to the cap sheet and configured to act upwards when pressure inside the power battery increases so that the first terminal and the second terminal are electrically connected to form a protection loop; and the first short circuit part and the resistance are connected in parallel when the protection loop is formed.

Abstract: The present application relates to an active equalization method and system of a lithium iron phosphate (LFP) battery pack.