A method for manufacturing a secondary battery includes a formation step for charging an assembled secondary battery to a state of charge (SOC) of 45% to 65%; an aging step for aging the secondary battery for which the formation has been completed; and a low voltage testing step for measuring the change in voltage value, wherein, in the low voltage testing step, a voltage value is measured in an SOC interval of 30% or lower. Since an SEI coating is stably formed in the method for manufacturing a secondary battery, charging time is shortened and thus the secondary battery can be mass-produced. In addition, since a low voltage test is performed in an interval in which the voltage change rate per capacity of a negative electrode is high, a low voltage defect due to non-uniformity of the formation process can be detected in the method for manufacturing the secondary battery.

The present application provides a method, a device, an apparatus, and storage medium for deviation correction of an electrode sheet. The deviation correction method of the electrode sheet includes: determining the first deviation amount of the electrode sheet on the stacking machine in the first direction; correcting a deviation of the electrode sheet in the first direction according to the first deviation amount; determining the second deviation amount of the electrode sheet in the second direction, wherein the second deviation amount is different from the first deviation amount; and correcting a deviation of the electrode sheet in the second direction according to the second deviation amount.

A substituted lithium-manganese metal phosphate of formula
LiFe.sub.xMn.sub.1-x-yM.sub.yPO.sub.4
in which M is a bivalent metal from the group Sn, Pb, Zn, Ca, Sr, Ba, Co, Ti and Cd and wherein: x<1, y<0.3 and x+y<1, a process for producing it as well as its use as cathode material in a secondary lithium-ion battery.

The present invention is a method for manufacturing a negative electrode active material for a non-aqueous electrolyte secondary battery. The method includes depositing silicon on a substrate by vapor deposition by using a metallic silicon as a raw material, the substrate having a temperature controlled to 300 C. to 800 C. under reduced pressure; and pulverizing and classifying the deposited silicon. The resulting negative electrode active material composed of silicon particles is an active material useful as a negative electrode of a non-aqueous electrolyte secondary battery in which high initial efficiency and high battery capacity of silicon are kept, cycle performance is superior, and an amount of a change in volume decreases at the time of charge and discharge.

A collapsible storage unit including: a plurality of triangular sidewalls at least partially defining a cavity for storing a liquid electrolyte therein; wherein the plurality of triangular sidewalls are configured to collapse in a longitudinal direction about a hinge disposed between adjacent sides of each of the plurality of triangular sidewalls.

The present application relates to a laminating machine, including a heating device, a first sheet material device, a second sheet material device, and a first combining device. By using the laminating machine, adhesives on opposite sides of a first combining material strip are heated and melted by the heating device; then, the first sheet material device and the second sheet material device attach a first sheet material and a second sheet material to the opposite sides of the first combining material strip respectively; next, a second combining material strip is formed by the first combining device. Due to the adhesives being melted, bonding strength of the first sheet material and the second sheet material to the first combining material strip can be guaranteed, avoiding a displacement after the first sheet material and the second sheet material are attached to the first combining material strip.

This application discloses a hot pressing apparatus including: a mounting frame; a pressing plate which is movable in a vertical direction, and is adapted to press against an electrode core; and a hot pressing portion including a first hot pressing portion and a second hot pressing portion. The first hot pressing portion and the second hot pressing portion are disposed at two sides of the pressing plate, respectively, and are used for hot pressing with two ends of the electrode core. In this way, the pressing plate is pressed against the electrode core, and the first hot pressing portion and the second hot pressing portion are used to perform hot pressing at two ends of the electrode core, so that the hot pressing mechanism adapts to electrode cores of different thicknesses to improve a hot pressing effect employed on the electrode core.

A detection apparatus and a battery production device are described. The detection apparatus includes a support frame, a ray source, a probe, and a carrying platform. The support frame includes a support arm, the ray source and the probe are both connected to the support arm, with the probe facing an exiting port of the ray source, and the carrying platform is located between the ray source and the probe, wherein the ray source and the probe are rotatable about a same rotation axis, and a rotation direction of the ray source is the same as that of the probe, such that during rotation, the probe remains facing the exiting port of the ray source and the carrying platform is located between the ray source and the probe.

A cell feeding method includes: controlling a first conveyor line to convey inflowing cells to a first material fetching position; controlling a second conveyor line to convey inflowing cells to a second material fetching position; controlling a third conveyor line to convey inflowing cells to a side taping station, and conveying the cells subjected to side taping treatment to a third material fetching position; controlling a first feeding and grabbing mechanism to grab a first number of cells from a first material fetching position to a first feeding area in the feeder position; and controlling a second feeding and grabbing mechanism to grab a first number of cells from a target material fetching position to a second feeding area in the feeder position.

A method for producing a cell stack for battery cells comprises at least the following steps: feeding in at least a first material strip consisting of a first material; making a first cut into at least the first material strip while forming at least one transport section having tensile strength; combining the first material strip with at least a second material strip consisting of a second material, so as to form a partial stack; making a second cut of the partial stack, whereby the transport section is cut open; and arranging at least two partial stacks so as to form a cell stack.