CATL Patente

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The embodiments of this application provide a winding pin, a winding apparatus, a battery manufacturing device, and a winding method. The winding apparatus includes a winding pin, a pair of first clamp pins, and at least one second clamp pin. The pair of first clamp pins are configured to move away from each other after the winding pin is withdrawn from an electrode assembly to stretch the electrode assembly, and the second clamp pin is configured to support an upper half portion of the electrode assembly in a process of stretching the electrode assembly by the pair of first clamp pins. The winding pin includes a winding pin body, an outer peripheral surface of the winding pin body is provided with a pair of first grooves, the first groove is configured to accommodate the first clamp pin, the pair of first grooves are spaced apart along a circumferential direction of the winding pin body, and the outer peripheral surface of the winding pin body is further provided with at least one second groove, the second groove is configured to accommodate the second clamp pin, and the second groove is spaced apart from the first grooves along the circumferential direction of the winding pin body. The technical solutions provided in this application can improve the reliability of the battery.

A conductive block and a detection mechanism are provided. The conductive block (1) is used for pressing electrode tabs (102) of an electrode assembly (100) for withstand voltage testing, where the conductive block (1) includes a transition surface (3), and the transition surface (3) matches an inclined surface formed after the electrode tabs (102) are pressed. Withstand voltage testing on the electrode assembly (100) through the conductive block (1) is conducted, where the transition surface (3) matches the inclined surface formed after the electrode tabs (102) are pressed, reducing the risk of stress concentration causing damage to the electrode tabs (102) due to the conductive block (1) abutting the electrode tabs (102) during pressing, as well as the risk of stress concentration causing damage to the electrode tabs (102) due to the conductive block (1) abutting the electrode tabs (102), and also reducing the risk of creases generated during pressing causing the electrode tabs (102) to lift, thereby improving the reliability of the electrode assembly (100), and thus improving the reliability of battery cells (105) and batteries (110).

The present application provides a modulation method and apparatus for a cascaded energy storage system. The cascaded energy storage system comprises N sub-modules which are connected in cascade, wherein N is greater than or equal to 2. The modulation method comprises: in an odd period, according to a first correspondence, using N carriers to modulate waveform signals output by the N sub-modules; and in an even period, according to a second correspondence, using the N carriers to modulate the waveform signals output by the N sub-modules, wherein in the first correspondence and the second correspondence, the N carriers are in one-to-one correspondence with the N sub-modules, and the first correspondence is different from the second correspondence. The modulation method provided by the present application can solve the problem of SOC imbalance of energy storage batteries of sub-modules in phases of the cascaded energy storage system in a phase-shifted carrier modulation method.

The present application discloses a use of an additive, formamidinium iodide and a preparation method therefor, a perovskite solar cell, a solar power generation device, and an electric device. The additive comprises a reducing agent. By incorporating the reducing agent in the additive and using the additive to prepare formamidinium iodide, generation of elemental iodine in the preparation process of formamidinium iodide can be reduced; in addition, iodine which has been oxidized to elemental iodine can be reduced to iodine anions so as to generate formamidinium iodide. The stability of formamidinium iodide is improved, and thus the stability and efficiency of perovskite cells are improved.

Disclosed in the present application is a conversion apparatus, comprising a CAN protocol transceiving interface; a communication protocol transceiving interface; and a protocol conversion module, which protocol conversion module is provided with a first interface and a second interface, wherein the first interface is connected to the CAN protocol transceiving interface, and the second interface is connected to the communication protocol transceiving interface. The protocol conversion module is configured to convert first data into second data, or is configured to convert the second data into the first data, wherein the first data is transmitted in a CAN protocol, and the second data is transmitted in a communication protocol. The embodiments of the present application can realize mutual conversion between CAN protocol data and communication protocol data, thereby improving the communication efficiency.

The present application discloses a positive electrode active material and a preparation method thereof, a positive electrode plate, a battery, and an electric apparatus, where the positive electrode active material includes a sodium manganese oxide, the sodium manganese oxide includes a first phase and a second phase, the first phase includes alternating first sodium ion layers and first transition metal layers, and the second phase includes alternating second sodium ion layers and second transition metal layers. In the first phase, an interlayer spacing between adjacent first transition metal layers in a direction perpendicular to a (001) crystal plane is d<1>, in the second phase, an interlayer spacing between adjacent second transition metal layers in the direction perpendicular to the (001) crystal plane is d<2>, and d<1>-d<2> ranges from 0.01 nm to 0.02 nm.

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