Abstract: An electrode includes a current collector, an active material layer, a first layer including first particles, and a second layer including second particles, wherein an average cross-sectional area of the first particles in a plane substantially parallel to the electrode surface is smaller than an average cross-sectional area of the second particles in a plane substantially parallel to the electrode surface.

Abstract: A power supply device includes a plurality of battery packs, and a plurality of battery controllers having a master-slave configuration and corresponding to the plurality of battery packs in a one-to-one correspondence.

Abstract: A method of manufacturing a battery pack that is provided with a plurality of stacked unit cells, the method comprising a step of, when a unit cell disposed on one outermost layer is referred to as a first unit cell, and, of the plurality of unit cells stacked in order from the first unit cell, the unit cell disposed on the other outermost layer opposite to that of the first unit cell is referred to as the Nth, where N is a positive number of 2 or more, unit cell: arranging an anvil at an external terminal of the Nth unit cell outside the battery pack; arranging a horizontal-vibration horn either at an external terminal of the (N?1)th unit cell outside the battery pack, or between an external terminal of the (N?1)th unit cell and an external terminal of the (N?2)th unit cell; and then using the anvil and the horn to ultrasonically join the external terminal of the Nth unit cell and the external terminal of the (N?1)th unit cell.

Abstract: The invention provides an electrode sheet, the surface of the active material layer of the electrode sheet is provided with an intermediate layer and a lithium-supplementing layer, the intermediate layer includes a solid electrolyte, and the lithium-supplementing layer includes a lithium-containing compound that self-decomposes to produce lithium ions. The electrode sheet of the present invention may effectively suppress the heat generated in the lithium supplementing process, and overcome the defect of continuous consumption of active lithium ions in the continuous growth of the SEI layer. Therefore, the electrode sheet provided by the present invention has excellent lithium supplementation effect and electrochemical performance.

Abstract: A battery and an electronic device are provided. The battery includes a case having an opening, a battery core disposed in the case, and a cover covering the opening of the case. The cover includes a cover body provided with a first hole and a high temperature resistant sheet disposed on a top of the cover body and covering the first hole.

Abstract: A battery, a battery assembly, and an electronic apparatus are provided. The battery includes: a casing having an opening; a cell disposed in the casing; and a cover plate covering the opening of the casing. The cover plate includes a cover plate body provided with a first hole and a high temperature resistant sheet disposed on an upper surface of the cover plate body and covering an upper opening of the first hole. The high temperature resistant sheet has a weak portion, and at least a part of an orthographic projection of the weak portion is located in the first hole in a direction perpendicular to the cover plate body.

Abstract: A wiring module is to be attached to multiple power storage elements. The wiring module includes a busbar connected to electrode terminals of the multiple power storage elements, a circuit board connected to the busbar with solder, and a protector configured to hold the busbar and the circuit board. The protector includes a busbar arrangement surface on which the busbar is disposed and a board arrangement surface on which the circuit board is disposed. The board arrangement surface and the busbar arrangement surface are perpendicular to each other.

Abstract: A positive electrode (110) is a first electrode, and a negative electrode (120) is a second electrode having an area larger than that of the first electrode. A separator (130) is folded and extends through between the positive electrode (110) and the negative electrode (120) adjacent to each other. A folded portion of the separator (130) covers a portion of the negative electrode (120) on the same side in each of a plurality of battery cells (10). Specifically, the folded portion of the separator (130) covers the upper portion of the negative electrode (120) in each of the plurality of battery cells (10).

Abstract: A method of manufacturing a lithium-ion secondary battery of the present invention includes at least four steps as follows: an initial charging step of charging the lithium-ion secondary battery, which has not been subjected to initial charging, under a temperature environment ranging of equal to or higher than ?20° C. and equal to or lower than 15° C.; an aging step of leaving the lithium-ion secondary battery under a temperature environment ranging of equal to or higher than 30° C. and equal to or lower than 80° C. after the initial charging step; a short circuit detecting step of detecting the presence or absence of a short circuit of the lithium-ion secondary battery by measuring a voltage drop quantity of the lithium-ion secondary battery and comparing the voltage drop quantity with a reference value; and a sorting step of sorting out a lithium-ion secondary battery in which no short circuit is detected.

Abstract: A non-aqueous electrolytic solution secondary battery including a positive electrode including a positive electrode active material capable of intercalating and deintercalating a lithium ion; a negative electrode including a negative electrode active material capable of intercalating and deintercalating a lithium ion; a non-aqueous electrolytic solution containing a lithium ion; and an outer package, wherein the positive electrode active material includes a lithium-containing composite oxide having a layered rock salt structure and represented by the following composition formula: LiNixCoyMnzO2, provided that 0.7?x?0.9, 0.05?y?0.2, 0.05?z?0.15, and x+y+z=1 are satisfied, and the battery is formed by using the non-aqueous electrolytic solution containing methylene methanedisulfonate and having a content thereof of 2.0% by mass or more and 5.0% by mass or less based on a solvent.

Abstract: The disclosure relates to the technical field of batteries, and in particular, to a battery module and an electronic device. The battery module includes a frame, a cell, a position-limiting member, and a buffer member. A plurality of the cells are stacked in the frame in parallel. The position-limiting member is disposed in the frame, and divides the frame into a plurality of spaces for the cells being evenly arranged. A plurality of the buffer members are respectively disposed between the adjacent cells and/or between the cell and the frame.

Abstract: A battery module and an electronic device are provided. The battery module includes a case and a cell. Multiple cells are stacked in the case along a thickness direction. The case includes a base plate, an upper cover, and a side wall. The side wall is formed by enclosing multiple side plates. The side plates include at least one movable plate capable of sliding along a stacking direction of the cells. When the cell swells, an swelling force and an swelling amount of the cell pushes the outermost cell to move toward the stacking direction, so that the movable plate is pushed and slides along with the swelling of the cell, which can reduce the swelling force on the movable plate to effectively reduce the swelling force on the movable plate in an swelling direction of the cell, so as to significantly improve the safety of the battery module.

Abstract: A solid-state battery module and a battery pack belonging to the technical field of batteries are provided. The solid-state battery module includes a casing and a cell stack disposed in the casing. The casing includes a top plate, a bottom plate, and two side plates, The two side plates are connected between the top plate and the bottom plate, and the two side plates are opposite to each other. At least one of the side plates is able to move relative to the top plate and the bottom plate in a first direction. In the battery pack provided by the disclosure, each of the side plates of the solid-state battery module and the box body are connected by a connecting piece. The connecting piece is able to generate plastic deformation in the stacking direction of the cell stack.

Abstract: In an initial state, a battery is in the following state. A laminate has a thickness T0 from a first electrode to a first electrode. A first position is spaced from the end portion of a separator on the first position side by a distance L0 in a direction perpendicular to a thickness direction of the laminate. The end portion of a separator on the first position side protrudes toward the first position from the end portion of the second electrode on the first position side, by a distance G in the direction perpendicular to the thickness direction of the laminate. The laminate is designed such that, even if the laminate swells in the thickness direction of the laminate, the thickness of the laminate from the first electrode to the first electrode is smaller than 4×{(T0/2)2+L02?(L0?G)2}1/2.

Abstract: The disclosure discloses a cylindrical battery and an electronic device. The cylindrical battery includes a case, a pole, a connecting piece, and a sealing nail. The case includes a cylindrical side wall and an end wall connected to the side wall, and a first through hole is disposed on the end wall. The pole includes a second through hole and passes through the first through hole. The connecting piece is disposed in the case and includes a protrusion, the protrusion extends into the second through hole, and the protrusion is fixedly connected to the inner wall of the second through hole.

Abstract: An electrolyte, an electrochemical device thereof, and an electronic device thereof are provided. An electrolyte includes vinylene carbonate and a carboxylate-based compound. Based on a mass of the electrolyte, a mass percentage of the vinylene carbonate is A %, a mass percentage of the carboxylate-based compound is B %, and the electrolyte satisfies: a value of A/B ranges from 0.1 to 10, and a value of A+B ranges from 1.1 to 6. In the electrolyte provided by the disclosure, the film formation on the surface of the negative electrode is improved, and the internal resistance is optimized. In this way, the electrochemical device exhibits good cycle performance at high temperature and room temperature and favorable capacity performance at high temperature and achieves low internal resistance.

Abstract: The present disclosure provides a liquid injection device for injection of electrolytic solution into a bag-shaped film exterior containing a generation element.

Abstract: A battery is provided. The battery includes a cell, including a tab; a casing, including an opening, wherein the cell is accommodated in the casing; a cover plate assembly, covering the opening; and a terminal, fixed onto the cover plate assembly and including a terminal body penetrating the cover plate assembly and a base plate disposed on a back surface of the cover plate assembly. The tab is welded to the base plate.

Abstract: The invention belongs to the technical field of secondary batteries, and discloses a current collecting member, a cell and an electronic device. The current collecting member includes a main body structure and a lead-out structure. The main body structure is further provided with protection member, at least one end of the protection member is bent along the width direction of the main body structure and wraps the corner portion of the main body structure in the thickness direction. The current collecting member of the invention protects one side of the main body structure of the current collecting member close to the electrode assembly and the corner portion of the main body structure through the protection member, thereby effectively protecting the tabs.

Abstract: The disclosure belongs to the technical field of secondary batteries, and discloses a current collecting member, a battery and a battery manufacturing method. The current collecting member includes a connecting structure, the connecting structure includes a through groove, the through groove extends along the length direction of the connecting structure, and the edge of the through groove is provided with a protrusion. The structural strength of the main body of the current collecting member of the present disclosure is high.