CATL Patente

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<div notation="docdba" type="abstract" xml:base="/api/emi/section/98fa8353-36dc-429b-920f-71f8d2347d56/image" xml:lang="en"><p>The invention refers to negative electrode plate (10), preparation method thereof and electrochemical device. The negative electrode plate (10) comprises: a negative current collector (11), a negative active material layer (12), and an inorganic dielectric layer (13) which are provided in a stacked manner; the negative active material layer (12) comprises opposite first surface (121) and second surface (122), wherein the first surface (121) is disposed away from the negative current collector (11); the inorganic dielectric layer (13) is disposed on the first surface (121) of the negative active material layer (12). The negative electrode plate (10) provided by the application is useful in an electrochemical device, and can result in an electrochemical device having simultaneously excellent safety performance and cycle performance.</p></div>

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Disclosed in the present application are an electrode plate laminating apparatus (100), a bare cell winding device, and a bare cell winding method. The electrode plate laminating apparatus (100) comprises: a first laminating roller assembly (20), which comprises a first laminating roller (21) and a second laminating roller (22), the first laminating roller (21) and the second laminating roller (22) being arranged directly opposite each other, and the first laminating roller (21) and the second laminating roller (22) being configured to sequentially stack and laminate a first separator (11), a first electrode plate (12) and a second separator (13) together, and a side separator laminating assembly (30), which is configured to laminate the part of the first separator (11) extending beyond a side edge of the first electrode plate (12) with the part of the second separator (13) extending beyond the side edge of the first electrode plate (12). By applying the technical solution provided by the embodiments of the present application, the problem of the first electrode plate and a second electrode plate overlapping each other due to the fact that the separators are prone to being folded in the winding process during preparation of the bare cell by the first separator, the first electrode plate, the second separator and the second electrode plate is solved.

This application discloses a loading tray and a formation apparatus. The loading tray includes: a support frame; at least two mounting members, where the at least two mounting members are fixedly disposed side by side on the support frame to divide the support frame into at least one accommodating cavity, each mounting member is provided with at least two groups of limiting mounting positions, each group of limiting mounting positions includes at least one limiting mounting position distributed at intervals, and arrangement spacings between all groups of limiting mounting positions are not completely the same; and at least two limiting blocks, where the at least two limiting blocks are respectively detachably disposed corresponding to the limiting mounting positions on the at least two mounting members to define at least one accommodating groove in each accommodating cavity. This solution can improve the compatibility of loading trays and reduce model change costs of loading trays.

Embodiments of this application provide an energy storage system and a microgrid system. The energy storage system includes: one or more battery clusters, where the battery cluster includes a plurality of battery cells, and a dimension of the battery cluster along a first direction is greater than a dimension of the battery cluster along a second direction; and an enclosure configured to accommodate the battery clusters, a dimension of the enclosure along the first direction being smaller than a dimension of the enclosure along the second direction; where along the first direction, the dimension of the enclosure matches the dimension of the battery cluster, such that the enclosure is configured to accommodate one row of battery clusters along the first direction, the first direction is perpendicular to the second direction, and both the first direction and the second direction are perpendicular to a height direction of the enclosure. The energy storage system and the microgrid system according to embodiments of this application can improve the space utilization of the enclosure of the energy storage system.

The present application provides a battery and an electrical apparatus. The battery includes a battery cell and a plurality of heat exchange plates. The battery cell includes a shell and an electrode unit accommodated in the shell, the electrode unit includes a plurality of first electrode plate layers, the plurality of first electrode plate layers have the same polarity and are stacked in a first direction, some of the first electrode plate layers are provided with first tabs and form two first tab groups, each first tab group includes a plurality of first tabs stacked and connected to one another, and a first electrode plate layer which is provided with no first tab is provided between the two first tab groups. The plurality of heat exchange plates are arranged in the first direction, the shell is arranged between adjacent heat exchange plates and can exchange heat with the heat exchange plates, and each first electrode plate layer at least partially overlaps with the heat exchange plate in the first direction.

The present application provides a transient voltage support method and apparatus for an energy storage converter, a device, and a storage medium, relating to the technical field of grid-connected conversion. The transient voltage support method for the energy storage converter includes: obtaining preset reference value data and output electrical information of the energy storage converter; obtaining active power information, reactive power information, and voltage amplitude information of a grid connection point in response to the output electrical information; and obtaining grid connection control data of the energy storage converter in response to one or more of the preset reference value data, the active power information, the reactive power information, and the voltage amplitude information, and controlling the energy storage converter to perform transient voltage support control during grid connection conversion through the grid connection control data. The method can enhance the transient voltage support capability of the energy storage converter and improve the stability of grid connection control.

Embodiments of the present disclosure provide a battery and an electric apparatus. The battery comprises a container and a battery cell; a containment cavity is formed in the container; the battery cell is arranged in the containment cavity, and the container is provided with a clearance area; the clearance area protrudes outward in a direction away from the battery cell and forms a protruding platform, so that a corresponding inner wall of the containment cavity is recessed to form an accommodating slot; a protrusion is formed on an outer surface of the battery cell, and at least a portion of the protrusion is located in the accommodating slot.

A winding device, a battery processing device, and a battery production line are provided, belonging to the technical field of battery manufacturing. The winding device is used for producing an electrode assembly, the electrode assembly comprising a first electrode plate, a second electrode plate, a first separator and a second separator. The winding device comprises: a first feeding mechanism, a second feeding mechanism, a third feeding mechanism, a fourth feeding mechanism, a first combining mechanism, a winding mechanism and a first detection apparatus. The first combining mechanism is used for combining incoming materials comprising at least the first electrode plate, the first separator and the second electrode plate into a first composite plate. The winding mechanism is located downstream of the first combining mechanism, and is used for winding an incoming material comprising at least the first composite plate to form the electrode assembly. The first detection apparatus is located between the first combining mechanism and the winding mechanism, and is used for detecting the first composite plate.

The present application provides a battery cell (20), a battery (100), and a power consuming apparatus, relating to the field of batteries. The battery cell (20) includes an electrode terminal (213), an electrode assembly (22), and an adapter piece (23). The adapter piece (23) connects the electrode terminal (213) and the electrode assembly (22). The adapter piece (23) includes a main body region (231) and a thinned region (232) that are connected. A thickness of the thinned region (232) is less than a thickness of the main body region (231). The thinned region (232) is configured to be welded to the electrode terminal (213). This can solve the problem that other parts are easily damaged during a process of welding the adapter piece (23) and the electrode terminal (213).

An electrolyte, a secondary battery, and an electrical apparatus. The electrolyte includes a first additive, a second additive, and a third additive. The first additive comprises an element-containing inorganic salt; the second additive comprises an unsaturated bond-containing compound, the reduction potential of the unsaturated bond-containing compound being greater than or equal to 0.8V(Li⁺/Li); and the third additive comprises an amide group-containing compound. The first additive, the second additive, and the third additive are added to the electrolyte, so as to improve both high-temperature performance and low-temperature performance of a secondary battery.

Provided are an electrode assembly (20), a battery cell (100), a battery (200) and an electrical device (1000). The electrode assembly (20) comprises a first electrode plate (21), a second electrode plate (22) and a separator (23). The second electrode plate (22) is stacked with the first electrode plate (21) in the thickness direction of the first electrode plate (21), and the polarity of the second electrode plate (22) is opposite to that of the first electrode plate (21). The separator (23) isolates the first electrode plate (21) from the second electrode plate (22), and is stacked with the first electrode plate (21) in the thickness direction of the first electrode plate (21). The separator (23), the first electrode plate (21) and the second electrode plate (22) are wound to form a whole. At a starting end (201) and/or an ending end (202) of the winding of the electrode assembly (20), at least one of the first electrode plate (21) and the second electrode plate (22) is fixed to the separator (23) by means of a connector (24).

Provided in the embodiments of the present application are a battery cell, a battery, and an electrical device. The battery cell comprises a housing, an electrode assembly, and an insulator. The electrode assembly is accommodated in the housing; the electrode assembly is formed by winding and/or stacking electrode sheets, and the electrode assembly has a first end face; and at least a portion of the insulator is arranged between the first end face and the housing; wherein at least one first through hole is formed on the part of the insulator opposite the first end face, the first through hole is a slot-shaped hole, and the length direction of each first through hole is parallel or at an angle with the stacking direction of the electrode sheet exposed by said first through hole. According to the technical solution of the present application, battery yield can be improved and production costs can be reduced.

A battery cell casing assembly and a battery cell, a battery, and an electrical apparatus. The battery cell casing assembly comprises a casing, an explosion-proof valve, and pole terminals; the casing has an opening, and the casing comprises a mounting wall which has a mounting hole that penetrates the mounting wall; the explosion-proof valve is arranged at the mounting hole and is connected to the mounting wall; and the pole terminals are disposed on the mounting wall and are arranged at an interval with the mounting hole inbetween. In the battery cell casing assembly in the embodiments of the present application, the pole terminals are arranged on the mounting wall of the casing, the pole terminals thus increases the structural strength of the mounting wall, and the mounting wall is not prone to deformation, thereby enhancing the protection effect of the casing on an electrode assembly, and facilitating the control over the consistency of the blasting pressure of the explosion-proof valve.

A pressure relief component, a battery cell, a battery, and an electric device, which belong to the technical field of batteries. The pressure relief component is used for a battery cell; the pressure relief component is provided with at least two pressure relief notches, each pressure relief notch and connecting lines at the two ends of said notch enclosingly form a first region, the plurality of first regions are arranged at intervals, and a connecting line of at least one first region is located on the side of the first region near the center of the pressure relief component. The described design allows an opening having a larger area to be formed when the pressure relief component opens while also lowering the risk of a battery short circuit caused by the connection of the pressure relief component with another component in the battery. The risk of the area of the formed opening when the pressure relief component opens being too small due to a part within a first region being blocked by another part of the housing of the battery cell is likewise reduced, and the reliability of the battery is improved.

A battery cell, a battery, and an electric device. The battery cell comprises a housing, an electrode assembly, and electrode terminal. The housing is provided with a wall portion. The electrode assembly is accommodated within the housing. The electrode terminal is riveted on the wall portion, and the electrode terminal is electrically connected to the electrode assembly. The electrode terminal comprises a flanged portion; in the thickness direction of the wall portion, the flanged portion is formed at the end of the electrode terminal close to the electrode assembly and located on the side of the wall portion facing the electrode assembly; the end of the electrode terminal facing away from the electrode assembly forms a continuous connection surface, the connection surface being used for connecting to a bus component. The present battery cell is a structure that allows the electrode terminal to be riveted onto the wall portion from inside the housing, causing the bus component to be able to directly connect to the continuous connection surface at the end of the electrode terminal away from the electrode assembly, thus facilitating an increase in the connection area between the bus component and the electrode terminal, and thereby being able to improve the connection stability and reliability between the electrode terminal and the bus component.

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