CATL Patente

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The present application discloses a tab-through device, assembly apparatus (3), and assembly method for a battery. The battery includes a housing and an electrode assembly. The housing is provided with an accommodation chamber, and a through hole is formed in the housing. The electrode assembly is arranged in the accommodation chamber. The tab-through device is configured to guide a tab part of the electrode assembly to extend out of the through hole. The tab-through device includes a guiding member and a support mechanism. The support mechanism is connected to the guiding member. The guiding member is configured to extend into the accommodation chamber and guide the tab part to extend out of the accommodation chamber through the through hole. According to the above method, the present application can effectively reduce the assembly difficulty of the battery.

Provided are a transfer device and a battery assembly system. The transfer device includes two conveyor belts, at least one clamping fixture group, and an adjustment assembly. The two conveyor belts are disposed in parallel to and spaced apart from each other. Each clamping fixture group includes two clamping fixtures, the two clamping fixtures are disposed on corresponding ones of the two conveyor belts, respectively, and the two clamping fixtures cooperate with each other to clamp an article to be conveyed. The adjustment assembly is configured to adjust a spacing distance between the two clamping fixtures in response to a control signal. In the above manner, the adaptability of the transfer device to batteries of different models can be improved.

Disclosed in the present application are a wrapping apparatus and wrapping method for an electrode assembly. The electrode assembly comprises an electrode main body and a tab portion, wherein the electrode main body has a first direction, a second direction and a third direction, and comprises two main surfaces, two end surfaces and two side surfaces, and the tab portion protrudes from the first one of the two end surfaces. The wrapping apparatus comprises a first wrapping assembly and a first positioning assembly. The first wrapping assembly is configured to position a wrapping film. The wrapping film comprises two main wrapping areas and a connecting area, with an opening being provided in the connecting area. The first positioning assembly is configured to position the electrode assembly and arrange the tab portion to face the connecting area. The first positioning assembly and the first wrapping assembly are configured to move relative to each other, such that the tab portion passes through the opening along with the relative movement of the first positioning assembly and the first wrapping assembly, and the connecting area wraps around the first one of the two end surfaces. In this way, the interference of the tab portion on the wrapping process can be reduced, and the wrapping effect is improved.

A battery cell (21), a battery (100), and an electrical apparatus are provided. The battery cell (21) includes: a shell (211), the shell (211) having a predetermined wall (212), the predetermined wall (212) being provided with a pressure relief portion (213) and a first glue-applied portion (214), and the first glue-applied portion (214) being arranged on two opposite sides of the pressure relief portion (213); an electrode assembly (22), the electrode assembly (22) being provided inside the shell (211); and an electrode terminal (23), the electrode terminal (23) being provided on the shell (211) and being electrically connected to the electrode assembly (22).

Disclosed in the present application are a battery processing device and a processing method. The battery processing device includes a material conveying assembly, a pairing assembly, and a welding assembly. The material conveying assembly is configured to convey a first electrode assembly and a second electrode assembly, where the first electrode assembly and the second electrode assembly each include an electrode main body and a tab part disposed on the electrode main body. The pairing assembly is configured to pair the first electrode assembly and the second electrode assembly such that the electrode main body of the first electrode assembly and the electrode main body of the second electrode assembly are stacked on each other. The welding assembly is configured to weld the tab part of the paired first electrode assembly and the tab part of the paired second electrode assembly. In this way, the production efficiency of the battery cell can be improved.

A composite current collector, an electrode sheet, a secondary battery and an electric device, which can improve the cycle performance of the secondary battery. The composite current collector comprises a support layer, and a bonding layer and an electrically conductive layer, which are sequentially stacked on at least one side surface of the support layer, wherein the bonding layer comprises a bonding-layer main body and a protruding portion, the protruding portion protruding in the thickness direction of the bonding layer and being embedded in the electrically conductive layer.

A battery case (100), a battery (200), and an electric device (1000). The battery case (100) comprises a first case portion (1), a second case portion (2), a first sealing member (3), and first fastening members (4); the first case portion (1) and the second case portion (2) are sealedly connected to form a sealed cavity (101), the first case portion (1) comprises a first sealing surface (10), the second case portion (2) comprises a second sealing surface (20), and the first sealing surface (10) and the second sealing surface (20) match to each other to form a sealing interface; the first sealing member (3) is arranged at the sealing interface to seal the first sealing surface (10) and the second sealing surface (20); the first fastening members (4) pass through the first sealing surface (10) and the second sealing surface (20) to connect the first sealing surface (10) and the second sealing surface (20) to clamp the first sealing member (3), so that the first sealing surface (10) and the second sealing surface (20) are sealedly connected; the first fastening members (4) are completely located on the outer side of the sealed cavity (101), and in the direction of extension of the sealing interface, the first fastening members (4) are located on the side of the first sealing member (3) away from the sealed cavity (101).

This application relates to a solar cell module and a method for preparing the same, a photovoltaic device, an electrical device, and a power generation device. In two adjacent sub-cells, a conductor is connected to a conductive layer of one sub-cell, with at least a portion protruding beyond at least one end of the conductive layer along a second direction. The electrode layer of the other sub-cell can connect with the protruding portion of the conductor outside the sub-cell, achieving series connection between the two sub-cells outside the sub-cells. This eliminates the need for the conventional two scribing operations before electrode layer deposition to achieve series connection, requiring only a cutting operation between sub-cells. Such a design, by providing a conductor protruding at least one end of the conductive layer along the second direction, eliminates the two scribing operations before sub-cell series connection, facilitating a single-cut preparation method, simplifying the preparation process, and improving preparation efficiency. Additionally, eliminating the two scribing operations reduces the likelihood of increased series resistance between sub-cells, thereby enhancing module performance.

A battery cell, a battery, and an electric device. The battery cell comprises a casing, a pressure relief structure, and an electrode assembly. The casing is provided with a first wall. The pressure relief structure is disposed on the first wall. The electrode assembly is a wound electrode assembly and is disposed in the casing, and the electrode assembly comprises a flat portion and a first bending portion. Along a first direction, the first bending portion is disposed on the side of the flat portion facing the first wall. A first boundary line is provided between the first bending portion and the flat portion. The distance between the first boundary line and the first wall is L, wherein L ≥ 5 mm. The first direction is perpendicular to the axial direction of the electrode assembly.

A battery (100), a battery management system (400), and an electric device (500). The battery (100) comprises: a case (10); a liquid leakage detection member (20), the liquid leakage detection member (20) being arranged in the case (1) to detect liquid in the case (10), and the liquid leakage detection member (20) being adapted to be communicationally connected to a control device (200) so that the control device (200) controls an alarm device (300) to operate; and a liquid drainage member (30), the liquid drainage member (30) being arranged in the case (10), and the liquid drainage member (30) being fixedly arranged on the bottom wall (11) of the case (10).

Disclosed are an electrolyte, a lithium secondary battery, and an electric device. The electrolyte includes a first solvent, a silane compound containing a carbon-carbon double bond, and a cyclic lithium borate compound. The first solvent includes a cyclic carbonate compound. Based on a total mass of the electrolyte, a mass content W3 of the cyclic carbonate compound, a mass content W1 of the silane compound containing a carbon-carbon double bond, and a mass content W2 of the cyclic lithium borate compound satisfy: 0.001 ≤ (W1+W2)/W3 ≤ 2.67. The silane compound containing a carbon-carbon double bond and the cyclic lithium borate compound are used in combination, which can improve the flexibility and thermal stability of an SEI film, thereby reducing the degree of gas production of the lithium secondary battery during the processes of cycling and storage and improving the storage performance, fast charge performance and cycling performance of the lithium secondary battery.

Disclosed in the present application are a hot-pressing roller mechanism, a pressing roller mechanism, an adhesive application device and a battery production system. The hot-pressing roller mechanism comprises a hot-pressing roller and a heating assembly, wherein the heating assembly and the hot-pressing roller are spaced apart from each other; and the heating assembly is configured to perform non-contact heating on the hot-pressing roller. By means of non-contact heating, no structural member is introduced to the surface of the hot-pressing roller, such that the phenomenon of foreign matter being introduced to the surface of an electrode sheet during the process of the hot-pressing roller performing hot pressing on the electrode sheet can be alleviated, thus increasing the adhesive application yield. The hot-pressing roller mechanism is used to perform hot pressing on an electrode sheet to which an adhesive has been applied, and to smooth and compact an adhesive tape on the surface of the electrode sheet, thus enhancing the bonding tightness between the adhesive tape and the electrode sheet, and increasing the adhesive application yield.

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