Abstract: A battery cell, a battery, an electrical apparatus, and a manufacturing method of a battery cell are provided. The battery cell includes a case, an electrode assembly, an end cover, a first terminal post, and a second terminal post. The case includes two side walls which are perpendicular to a first direction and are spaced apart, and a bottom wall perpendicular to a second direction and connected to the two side walls; the case is provided with a first side opening and a second side opening which are opposite to each other in a third direction, and a top opening opposite to the bottom wall. The electrode assembly is arranged in an accommodating cavity and includes a main body part, and a first tab and a second tab which extend out of the main body part and have opposite polarities. The end cover is connected with the case.

Abstract: An electrode assembly may include a first electrode plate, where the first electrode plate may be coated with both an active substance layer and a viscous substance layer on two sides in a thickness direction of the electrode plate, and the active substance layer and the viscous substance layer on each side may be disposed side by side in a height direction of the electrode plate; and separators provided on the two sides of the first electrode plate in the thickness direction of the electrode plate and stacked with the first electrode plate; where in an unfolded state of the electrode assembly, the separator on each side of the first electrode plate may be a continuous integral structure, and the separators may be connected to the first electrode plate through the viscous substance layers.

Abstract: An explosion-proof box for batteries is provided, including: an outer shell; an inner shell, the inner shell being positioned inside the outer shell; and a flame arresting device, the flame arresting device running through both the outer shell and the inner shell, where the flame arresting device includes: an exhaust passage configured to discharge gases generated within the inner shell to the outside of the outer shell; and recesses disposed on the inner surface of the exhaust passage for absorbing heat energy.

Abstract: An electrode assembly is formed by winding an electrode plate and a separator, and the electrode plate includes a coating region and a plurality of tabs. When the electrode assembly is unfolded, the tabs each include a first part and a second part, and the second part is located on a side of the tab that is away from the coating region. Along a length direction of the electrode plate, two sides of the first part respectively have a first side cut and a second side cut that are opposite to each other, and two sides of the second part respectively have a third side cut and a fourth side cut that are opposite to each other. The first side cut and the third side cut are disposed located on a same side and connected to each other.

Abstract: A quick-change lock assembly may comprise: a shell with a hollow cavity formed therein; a quick-change bolt arranged in the cavity, wherein the quick-change bolt comprises a guide section, a threaded fixing section, a flange portion and a tool matching section, a through hole is formed in the quick-change bolt along the axial direction, first anti-loosening teeth are formed on the guide section; an unlocking mandrel configured to be inserted and retained in the through hole, wherein the length of the unlocking mandrel is greater than the length of the through hole, and when an external tool is inserted into the tool matching section, the external tool can push the unlocking mandrel to move along the through hole and protrude from the guide section to remove the locking of the first anti-loosening teeth; and a bolt fixing ring fixed to the shell and configured to stop the flange portion.

Abstract: A battery may include a box; and at least two groups of battery cells accommodated in the box, where each group of battery cells may include a plurality of battery cells arranged along a first direction, the first direction being parallel to an upper cover or a bottom wall of the box, and the at least two groups of battery cells may be stacked along a second direction, the second direction being perpendicular to the first direction. The battery cell may be a polyhedral structure and include a first wall and a second wall that may be connected to each other, where the first wall may be parallel to the first direction, the second wall may be oblique to the first wall, and a cross section of the battery cell on a plane perpendicular to the first wall and the second wall may be a parallelogram.

Abstract: This application relates to the field of battery technologies, and in particular, to a binder and a preparation method thereof, and a separator, electrode assembly, battery cell, battery, and electric apparatus containing such binder. The binder includes a core layer structure and a shell layer structure provided on a surface of the core layer structure, where the core layer structure includes a polyacrylate polymer, and the shell layer structure includes a polyvinylidene fluoride polymer.

Abstract: The present application relates to a battery cell and a manufacturing method and device thereof, a battery, and a power consumption apparatus, belonging to the field of battery manufacturing technologies. The battery cell includes: a shell with a first wall; an electrode assembly; and a first current collecting member, where the first wall has a first surface facing the first current collecting member, the first current collecting member has a second surface facing the first wall, one of the first surface and the second surface is provided with a protrusion and the other abuts against the protrusion to form a gap between the first wall and the first current collecting member; and the first current collecting member is provided with a first hole and a second hole, and the first hole is configured to be in communication with the second hole through the gap.

Abstract: A connecting piece includes a piece body and a bulge protruding from the piece body. The connecting piece quality inspection method includes: obtaining an inspection image of the connecting piece, where the inspection image covers the bulge; determining, in the inspection image, position information of a reference contour of the bulge and position information of an inspection contour of the bulge, where the reference contour is a contour of a mouth portion of the bulge co-planar with the piece body, and the inspection contour is a contour of a bottom portion of the bulge away from the piece body; and determining a quality inspection result of the connecting piece based on the position information of the reference contour and the position information of the inspection contour.

Abstract: A camera pixel calibration apparatus and a winding device are provided. The camera pixel calibration apparatus includes: a camera, where the camera has a shooting lens; and a reference assembly, where the reference assembly is disposed between the shooting lens and a coating material. The reference assembly includes a bracket and a calibration plate, the bracket is provided with a camera viewing window, and the calibration plate is disposed on a surface of the bracket close to the shooting lens.

Abstract: The present application provides a battery module, which includes a plurality of batteries, an end plate and an output electrode connecting sheet. The plurality of batteries are arranged in a longitudinal direction. The end plate has: a main body portion, located on one side of the plurality of batteries in the longitudinal direction; and an extension portion, formed on the main body portion and extending in the longitudinal direction away from the batteries. The output electrode connecting sheet has: a first connecting portion, connected to a corresponding battery; and a second connecting portion, connected to one end of the first connecting portion and fixed to the extension portion of the end plate.

Abstract: Embodiments of this application provide a battery, an electric apparatus, and a method for preparing battery. The battery includes: a plurality of battery cells, where at least two of the battery cells are arranged along a first direction; a sampling part, configured to collect electrical signals from the plurality of battery cells; and a support part, configured to support the sampling part, where the support part is disposed between two adjacent battery cells in the first direction, and is attached to the battery cells. In the technical solution in the embodiments of this application, the sampling part is easy to install, and the sampling part can be prevented from falling off during use of the battery.

Abstract: This application relates to the technical field of electronics, and discloses a detection circuit and a detection method of an electrical control device, and an electric vehicle. In some embodiments of this application, the detection circuit includes a drive circuit configured to detect an electrical control device. The drive circuit includes a drive power module and a low-side switch unit. The detection circuit includes: a first detection module, a second detection module, and a control module. The control module is configured to obtain an electrical signal at a third end of the first detection module, and/or an electrical signal at a second end of the second detection module; and determine, based on the electrical signal at the third end of the first detection module, and/or the electrical signal at the second end of the second detection module, whether the drive circuit of the electrical control device is faulty.

Abstract: Disclosed is a welding device, which includes a drive unit, a first connecting rod, a second connecting rod, a welding head and a welding base. The drive unit is in driving connection to one end of the first connecting rod and one end of the second connecting rod; another end of the first connecting rod is in driving connection to the welding head, and is configured for causing, being driven by the drive unit, the welding head to move in a direction close to or away from the welding base; and another end of the second connecting rod is in driving connection to the welding base, and is configured for causing, being driven by the drive unit, the welding base to move in a direction close to or away from the welding head. The present application can ensure the synchronous movement of the welding head and the welding base.

Abstract: An electrode assembly manufacturing device includes a winding mechanism, a heating mechanism, a conveyor belt arranged between the heating mechanism and the winding mechanism, and a forming mechanism. The winding mechanism is configured to wind a positive electrode sheet, a separator, and a negative electrode sheet into an electrode assembly. The conveyor belt is configured to transfer the electrode assembly from the winding mechanism to the heating mechanism. The heating mechanism is configured to heat the electrode assembly. The forming mechanism is configured to press and form the electrode assembly.

Abstract: The present application relates to a secondary battery, a process for preparing the same and an apparatus containing the secondary battery.

Abstract: This application provides a method, an apparatus, a system for detecting battery thermal runaway, and a battery management unit. The method includes: obtaining an output signal of an air pressure sensor located in a battery pack, and obtaining parameter information of the battery pack; determining state information of the air pressure sensor based on the output signal of the air pressure sensor; and generating an alarm signal indicating occurrence of thermal runaway in the battery pack based on the state information of the air pressure sensor and the parameter information of the battery pack. In this application, the thermal runaway detection for the battery pack may be implemented by considering parameter information of both the air pressure sensor and the battery pack, improving the reliability of the thermal runaway detection for the battery pack, reducing the probability of false positives and false negatives, and improving driving safety.

Abstract: The present application provides a battery including a box body, which includes a first wall and a second wall which is connected to the first wall and extends upward, and a battery module which is arranged in the box body and located above the first wall, the battery module includes a battery cell arrangement structure including a plurality of battery cells stacked along a first direction, and an end plate which is arranged between the second wall and the battery cell arrangement structure, and the end plate is fixedly connected to the battery cell arrangement structure, where a restraint surface is arranged on the second wall, the restraint surface is used to abut against the end plate to restrict the end plate from moving upward, and the end plate is configured to move towards the second wall when the battery cell arrangement structure expands to provide expansion space.

Abstract: Embodiments of this application provide a battery, an electric device, and a battery manufacturing method. The battery includes a housing, a battery cell, a liquid cooling system, and a detection apparatus, where the housing has a bottom plate, the battery cell is disposed inside the housing, the liquid cooling system is configured to cool the battery cell by using a coolant, and the detection apparatus is configured to detect coolant leaked from the liquid cooling system, where the detection apparatus includes a detection part with a detection position set between the battery cell and the bottom plate. The electric device includes the battery.

Abstract: Provided are an electrode assembly, a battery cell, a battery, and an electric apparatus. The electrode assembly comprises a positive electrode plate, a negative electrode plate, and a separation assembly, and the separation assembly is configured to separate the positive electrode plate from the negative electrode plate. At least part of the separation assembly is provided as a multi-layer structure area, and at least part of the multi-layer structure area is located between the positive electrode plate and negative electrode plate adjacent to each other.