CATL Patente

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This application discloses a harmonica tube and a preparation method thereof, a liquid cooling plate, a battery, and an electric apparatus, where a material of the harmonica tube includes a polyphenylene sulfide composition, and the polyphenylene sulfide composition includes a polyphenylene sulfide resin and a toughening agent; the toughening agent includes a copolymer of an olefin and a glycidyl ester. By providing the polyphenylene sulfide composition as the material for the harmonica tube, this application facilitates reducing issues such as material breakage or poor extrusion flow during extrusion molding, enabling the formed harmonica tube to exhibit excellent mechanical strength, deformation resistance, corrosion resistance, heat resistance, heat dissipation, and creep resistance, lowering the risk of cracking under pressure during use, and enhancing production capacity and product quality.

Provided in the present application are a polymer, a preparation method therefor, a positive electrode sheet, a secondary battery, and an electrical device. The polymer includes a structure as represented by Formula I. X includes a phosphate group or a phosphite group, R1 and R3 each independently include at least one of a polyether segment, a polyester segment, hydrogen and a hydrocarbon group. At least one of R1 and R3 includes a polyether segment or a polyester segment. R2 includes an organic segment. The polymer provided in the present application can effectively improve the maximum solid content of a positive electrode slurry, shorten the filtering time, improve the production efficiency and quality of the electrode sheet, and also improve the flexibility of the electrode sheet.

A battery cell, a battery, and an electric device are provided. The battery cell includes a main body portion, a first tab, a first insulating adhesive, and a second insulating adhesive. The first tab is formed at an axial end of the main body portion. The first insulating adhesive is adhered to an outer periphery of the main body portion. The second insulating adhesive is adhered to the first tab. In an axial direction of the main body portion, a gap is provided between the first insulating adhesive and the second insulating adhesive. The battery includes the battery cell. The electric device includes the battery cell or the battery.

An energy storage box (100) and an energy storage system (200). The energy storage box (100) includes: a box body (10); a power distribution box (20), and an energy storage device (70), where the energy storage device (70) has a first medium flow path; and a heat exchange mechanism, where the heat exchange mechanism includes a heat exchange device (40), at least part of the heat exchange device (40) is arranged in the power distribution box (20), the heat exchange device (40) has a second medium flow path, the heat exchange mechanism further includes a temperature adjustment device (30), the temperature adjustment device (30) communicates with the first medium flow path to form a first medium circulation flow path, the temperature adjustment device (30) is connected to the second medium flow path to form a second medium circulation flow path, the first medium circulation flow path and the second medium circulation flow path include a heat exchange medium therein, and the temperature adjustment device (30) is configured to adjust the temperature of the heat exchange medium.

The present application provides a solar cell and a manufacturing method therefor, and an electric device. The solar cell comprises: a first electrode layer, an active layer, a second electrode layer and a semi-packaging layer which are sequentially stacked, wherein the semi-packaging layer comprises a plane part located between the active layer and the second electrode layer and a packaging part at least partially located on at least one side surface of the active layer. The plane part of the semi-packaging layer located between the active layer and the second electrode layer can inhibit migration of active ions in the active layer to the second electrode layer, and the packaging part of the semi-packaging layer at least partially located on at least one side surface of the active layer can block external water oxygen, so that degradation of the active layer under the action of water oxygen is reduced, thereby comprehensively improving the stability of the solar cell.

The present application discloses an energy storage module control method, an apparatus, a device, a system, and an energy storage module, relating to the field of energy storage technologies. The control method for the energy storage module includes: obtaining a bus current of the energy storage module and an available current of multiple battery branches connected in parallel within the energy storage module; and controlling a target quantity of battery branches among the multiple battery branches to be put into use based on the bus current and the available current of each battery branch. In the embodiments of the present application, the target quantity of battery branches to be put into use among the multiple battery branches is controlled based on the bus current and the available current of each battery branch. This allows the bus current to be actively allocated to the target quantity of battery branches, achieving active allocation of the bus current to reduce current ripple in the battery branches. Additionally, this allows each battery branch put into use to operate close to its available current condition, thereby improving the utilization rate of the battery branches.

The present application relates to the technical field of solar cells, and discloses a solar cell and a preparation method therefor, a photovoltaic module and a photovoltaic device. The solar cell comprises a first electrode layer, a hole transport layer, a first light absorbing layer, an interconnection layer, a second light absorbing layer, an electron transport layer and a second electrode layer which are sequentially arranged in a first direction, wherein the interconnection layer comprises an SnO_x layer, the SnO_x layer comprises at least three SnO_x materials, and in the first direction, x decreases from 2 to 1 in gradient. According to the technical solution of embodiments of the present application, the performance of the solar cell is improved.

A lock assembly (100), a mounting bracket, a battery (300), and an electric apparatus (200) are provided. The lock assembly (100) includes: a mounting base (10), including a first locking wall surface (15), where the first locking wall surface (15) has a lock pin passage groove (13); a first locking member (20), including a first mating portion (25) and a locking groove (21), where a plane passing through an axis of a first rotation shaft (22) is a first plane; and a second locking member (30), including a second mating portion (34), where a plane passing through an axis of a second rotation shaft (32) is a second plane. When the first mating portion (25) mates with the second mating portion (34), an overlapping region A of the locking groove (21) and the lock pin passage groove (13), projected in a direction perpendicular to the first locking wall surface (15), is located between the first plane and the second plane.

This application pertains to the field of power electronics technology and provides a power supply circuit for a battery management system of an energy storage system, an energy storage valve, and an energy storage station. When an energy storage submodule (10) where the battery management system in the power supply circuit for the battery management system is located operates normally, a battery module (Bat) of the energy storage submodule (10) is selected to supply power to the battery management system. When the energy storage submodule (10) where the battery management system is located is bypassed, energy storage submodules (10') other than the energy storage submodule (10) where the battery management system is located are selected to supply power to the battery management system, thereby mitigating the issue of over-discharge in the battery module (Bat) of the bypassed energy storage submodule (10) due to the continuous consumption of the battery management system. Furthermore, all battery management systems within the energy storage submodule (10) are controlled to be powered by batteries of electric cabinets (100) where the battery management systems are located, allowing for the charge level uniformity of the electric cabinets (100) in the same energy storage submodule (10).

A solar cell and a manufacturing method therefor, a photovoltaic module, and a photovoltaic device. The solar cell comprises a first light absorption layer, a composite layer, and a second light absorption layer which are sequentially arranged in a first direction, wherein the first direction is an incident direction of sunlight, and the composite layer comprises a first metal layer and a first metal diffusion inhibition layer arranged on at least one side of the first metal layer. According to the technical solution, the performance of the solar cell is improved.

The present application relates to the technical field of batteries, and particularly to a battery manufacturing process, a battery treatment device, a battery, and a power-consuming device. The battery manufacturing process comprises: obtaining a battery to be subjected to treatment, and subjecting the battery to electrolyte injection; and charging the battery before sodium in the battery is reduced at the negative electrode. In the present application, the battery is charged before sodium in the battery is reduced at the negative electrode; during the process of charging the battery, water can receive electrons at the negative electrode to undergo a reduction reaction, so as to produce hydrogen and hydroxy radicals, or water is decomposed in the electrolyte to produce hydrogen ions, and the hydrogen ions can receive the electrons at the negative electrode to undergo a reduction reaction so as to produce hydrogen; in such a way, water in the battery can be removed; after the water removal, sodium is reduced at the negative electrode to produce an elementary sodium metal, thus reducing the risk of the reduced sodium reacting with water, reducing a loss of battery capacity, and improving the cycling performance of the battery.

Disclosed in the present application are a circuit protection apparatus, a battery management system and an electrical device. The circuit protection apparatus comprises a current measurement module, a drive module and a fusing module. The current measurement module is separately connected to the drive module and a circuit undergoing test; and the current measurement module is configured to measure a current value in said circuit, and, when the current value is greater than a preset current threshold, to send a drive signal to the drive module. The fusing module is connected in series into said circuit. An input end of the drive module is connected to the current measurement module; an output end of the drive module is connected to the fusing module; and the drive module is configured to drive, when the drive signal is received, the fusing module to disconnect said circuit. When overcurrent occurs to circuits, the embodiments of the present application can reduce delay time for circuit disconnection control operations, so as to increase the speed of disconnecting the circuits, thus improving the effects of overcurrent protection.

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