Abstract: Provided are a rolling apparatus and a processing device, which are used for rolling an electrode plate. The rolling apparatus includes a first roller and a second roller, where the first roller and the second roller are disposed at two sides of the electrode plate in a thickness direction of the electrode plate. The first roller is provided with a plurality of recessed portions, the electrode plate includes a plurality of insulation coating layer regions and a plurality of tabs, and in a projection of the electrode plate in the thickness direction, at least part of a projection of the insulation coating layer region and a projection of the tab are located within a projection of the recessed portion. The rollers deflect under a large rolling pressure.

Abstract: A control method and device of a voltage converter and a voltage control system are provided. In some embodiments, the control device includes a first control module configured to obtain a current reference value according to an output voltage of a voltage converter and a given voltage value; a current modulation module configured to reduce the current reference value when an output current of a voltage converter is greater than a first current threshold; and a second control module configured to control the output current of a voltage converter according to the reduced current reference value and an output current.

Abstract: This application discloses a bidirectional vent valve, a battery, and an electrical device. The bidirectional vent valve includes: a valve seat, where the valve seat is configured to form a gas duct, and the gas duct includes a first end and a second end; a bidirectional valve assembly, where the bidirectional valve assembly is movably disposed in the gas duct, and is configured to open or close the gas duct through movement relative to the gas duct; and a first elastic component, configured to exert a force on the bidirectional valve assembly to close the air duct, and, when an air pressure difference between the first end and the second end of the gas duct is greater than a first threshold, the bidirectional valve assembly is configured to overcome the force of the first elastic component to open the gas duct.

Abstract: Embodiments of the present application provide a case for a battery, a battery, a power consumption device, and a method and device for producing a battery. The case includes: a thermal management component configured to adjust temperature of a battery cell accommodated in the case; a first wall provided with a through hole, the through hole being configured to communicate a gas inside and outside the case; and a condensing component attached to the thermal management component, the condensing component being configured to shield the through hole so as to condense a gas flowing into the inside of the case through the through hole. According to the technical solutions of the embodiments of the present application, the safety of the battery can be enhanced.

Abstract: Embodiments of the present application provide a case for a battery, a battery, a power consumption device, and a method and device for producing a battery. The case includes: a thermal management component configured to adjust temperature of a battery cell accommodated in the case; a first wall provided with a through hole, the through hole being configured to communicate a gas inside and outside the case; and a heat conducting component attached to the thermal management component and the first wall, the heat conducting component being configured to conduct heat of the thermal management component to the first wall, so that the first wall condenses a gas flowing from the outside of the case to the inside of the case through the through hole. According to the technical solutions of the embodiments of the present application, the safety of the battery can be enhanced.

Abstract: A box body includes a carrying plate configured to carry a battery and a one-way gravity valve disposed at the carrying plate. The one-way gravity valve is configured to be closed in response to a gravity of liquid in the box body being less than a threshold, and to be open in response to the gravity of the liquid in the box body reaching the threshold.

Abstract: Disclosed are a battery cell self-discharge current detection method, apparatus, and device, and a computer storage medium. The method includes: controlling a constant voltage source to start charging a battery cell at a first moment, and acquiring a first rate of change of a target current over time in a first preset duration after the first moment; controlling, in the case where the first rate of change is greater than a first threshold value, a constant current source and the constant voltage source to charge the battery cell; acquiring, in the case of reaching a second moment, a second rate of change of the target current over time in a second preset duration after the second moment, wherein the second moment is a moment when the time for charging the battery cell using the constant current source and the constant voltage source reaches a third preset duration; and determining.

Abstract: The present application provides a fire-fighting apparatus, a box assembly, a battery, a power consumption apparatus, and a method for preparing a battery. The fire-fighting apparatus includes: a pipe, a gas release mechanism, and a blocking structure. The pipe has an air inlet end and an air outlet end, and the air inlet end is configured to be connected to the battery, so that a combustible gas generated in the battery during thermal runaway events is capable of entering the pipe from the box via the air inlet end and being discharged from the pipe via the air outlet end; and the gas release mechanism is configured to be connected to the pipe and release a fire-fighting gas into the pipe when thermal runaway occurs in the battery; and the blocking structure is configured to block the combustible gas and the fire-fighting gas and change a flow direction.

Abstract: Embodiments of the present application provide a battery, a power consumption device, and a method and device for producing a battery. The battery includes: a battery cell, the battery cell including a pressure relief mechanism configured to be actuated when an internal pressure or temperature of the battery cell reaches a threshold, to relieve the internal pressure; a fire-fighting pipeline configured to accommodate a fire-fighting medium and discharge the fire-fighting medium toward the battery cell when the pressure relief mechanism is actuated; and an accommodating part configured to accommodate the fire-fighting medium discharged from the fire-fighting pipeline to lower a temperature of the battery cell. According to technical solutions of the embodiments of the present application, the safety of the battery could be enhanced.

Abstract: A battery case short-circuit processing method and system are provided. The battery case short-circuit processing method includes: when a short circuit between a case of a battery and a first electrode of the battery is detected, connecting the case and a second electrode of the battery by shorting, wherein if the first electrode is a positive electrode, the second electrode is a negative electrode; and if the first electrode is a negative electrode, the second electrode is a positive electrode; disconnecting the case of the battery from the second electrode, and carrying out standing of the battery for a preset duration; after the standing duration of the battery, detecting a potential difference between the case and the first electrode.

Abstract: Provided are a coating apparatus and a coating system, where the coating apparatus includes: a coating module, the coating module including a coating roller and a coating die, where the coating roller is configured to drive, when rotating, a substrate to move toward the coating die, and the coating die is configured to apply a coating onto the substrate; an error acquisition module having a predetermined distance to the coating roller and configured to acquire a circular run-out error of rotation of the coating roller and transmit the circular run-out error to a linkage module; and the linkage module configured to adjust position of the coating die in real time according to the circular run-out error transmitted to the linkage module, so as to keep a distance between the coating roller and the coating die unchanged.

Abstract: This application relates to the field of batteries, and in particular, to an electrode assembly and a manufacturing method therefor, a battery cell, a battery, and an electric apparatus. The electrode assembly may include: a first electrode plate, being folded back and forth in a first direction so that the first electrode plate includes a plurality of first laminates connected and stacked in sequence; and a second electrode plate, being opposite the first electrode plate in polarity and being folded once in a second direction so that the second electrode plate includes two second laminates connected to each other, where the second direction may be perpendicular or parallel to the first direction, and the second laminates and the first laminates may be alternately stacked in sequence.

Abstract: The present application provides a fire-fighting apparatus, a box assembly, a battery, a power consumption apparatus, and a method for preparing a battery. The fire-fighting apparatus includes: a pipe, a gas release mechanism, and a blocking structure. The pipe has an air inlet end and an air outlet end, and the air inlet end is configured to be connected to the battery, so that a combustible gas generated in the battery during thermal runaway events is capable of entering the pipe from the box via the air inlet end and being discharged from the pipe via the air outlet end; and the gas release mechanism is configured to be connected to the pipe and release a fire-fighting gas into the pipe when thermal runaway occurs in the battery; and the blocking structure is configured to block the combustible gas and the fire-fighting gas and change a flow direction.

Abstract: The present disclosure provides an electrode assembly and a secondary battery. The electrode assembly includes a first electrode plate, a second electrode plate and a separator. The first electrode plate, the second electrode plate and the separator are wound to a flat structure, and the flat structure comprises a main region and corner regions, the corner regions are provided at two ends of the main region along a width direction of the main region. The first electrode plate and the second electrode plate each are wound to turns. A gap is provided between two adjacent turns of the first electrode plate, the gap includes a first gap and a second gap. The first gap corresponds to the corner region in position, the second gap corresponds to the main region in position, and a dimension of the first gap is larger than a dimension of the second gap.

Abstract: Embodiments of this application provide a box, a battery, and an apparatus, and relate to the field of battery technologies. The box is provided with a discharge hole, and the discharge hole is configured to discharge, from inside the box, flame produced when thermal runaway occurs in a battery cell. The box is further provided with a fire extinguishing member that is configured to extinguish the flame for cooling when the flame passes through the discharge hole. In this application, the discharge hole and the fire extinguishing member are arranged in the box, so that when the flame produced when thermal runaway occurs in the battery cell passes through the discharge hole, the fire extinguishing member can release a fire extinguishing agent to extinguish the flame for cooling. This prevents the flame from being discharged from inside the box through the discharge hole, thereby improving safety performance of the battery.

Abstract: A heat exchange pipe joint includes a first pipe and a second pipe that are separately formed and in communication with each other. The first pipe is detachably connected to a second side of the installation plate, and the second pipe is detachably connected to a first side of the installation plate. When the heat exchange pipe joint is applied to the battery pack, the heat exchange pipe joint in a split-structure requires a small operation space for detachment and installation. In this case, a process of taking out the entire heat exchange pipe joint from the case can be avoided. In this way, the detachment and installation of the heat exchange pipe joint can be easy and convenient, thereby facilitating the reparation process thereof.

Abstract: Embodiments of the present application provide a sleeve assembly, a cover plate assembly, a battery, and an electricity-consuming apparatus. The sleeve assembly is used for sealing a through hole. The sleeve assembly includes: a sleeve with an opening on at least one end; a nail body including a body portion. The size of the body portion is larger than the size of the barrel diameter of the sleeve. The body portion is configured to be inserted into the sleeve through the opening and press the inner wall of the sleeve after the sleeve is inserted into the through hole in the axial direction so as to form a protrusion for riveting the sleeve to the through hole on the outer wall of the sleeve.

Abstract: This application provides a battery charging control method and device. Voltages of N cell units in an Mth sampling period are obtained, and a voltage of the battery at each sampling moment among K sampling moments in said sampling period is calculated. Charging of the battery is stopped when the voltage of the battery increases monotonically in the Mth sampling period and a trend of a fitting curve of the voltage of at least one cell unit among the N cell units in said sampling period is not rising.

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: This application relates to an end cover assembly, a battery cell, a degassing method, a battery, and an electric apparatus. The end cover assembly includes: an end cover plate provided with a degassing hole, where the degassing hole penetrates through the end cover plate; and a degassing apparatus mounted in the degassing hole, where the degassing apparatus includes a columnar portion, a first limiting portion, a second limiting portion, a first elastic member, and a second elastic member. The columnar portion penetrates through the degassing hole. The first limiting portion and the second limiting portion are respectively located on an outer side and an inner side of the end cover plate. The first elastic member is located between the first limiting portion and the end cover plate. The second elastic member is located between the second limiting portion and the end cover plate.