CATL Patente

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The present application provides a smoothing apparatus and a battery assembly system to solve the problem of occurrence of wrinkles on an insulating protective film outside an electrode assembly in the prior art. The smoothing apparatus includes a frame, a drive mechanism, and a pair of rollers that are matched. The rollers are rotatably connected to the frame and used to smooth a member to be smoothed; and the drive mechanism is disposed on the frame and connected to the rollers, and is used to drive the pair of rollers to rotate synchronously. In this way, the drive mechanism drives the pair of rollers to rotate synchronously, so that linear speeds of outer surfaces of the two rollers are the same, thereby solving the problem in the related art that two drive sources are used to respectively drive a pair of rollers but rotational speeds are different.

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A silicon-carbon negative electrode material and a preparation method therefor are provided. the silicon-carbon negative electrode material includes a carbon skeleton having a pore structure and a silicon-based material arranged in the pore structure, where in a region formed by extending from a surface of the silicon-carbon negative electrode material inward by 10 nm away from the surface, a content of high-valence silicon is less than 25% relative to a total amount of low-valence silicon and the high-valence silicon, where the low-valence silicon is silicon with a valence of 0 to 2, and the high-valence silicon is silicon with a valence of 3 to 4. For the silicon-carbon negative electrode material, the specific delithiated capacity and the initial coulombic efficiency of the silicon-carbon negative electrode material can be improved, and the specific discharge capacity and the initial coulombic efficiency of a secondary battery can be enhanced.

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Zusammenfassung wird geladen …

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An aluminum alloy material, an aluminum alloy structural component, a preparation method of an aluminum alloy structural component, a battery box, a battery system, an electric apparatus (6), and an application are provided. By mass percentage, the aluminum alloy material includes silicon element, copper element, titanium element, magnesium element, zinc element, manganese element, strontium element, a matrix element Al, and unavoidable impurity elements. The aluminum alloy material includes no Al<2>Cu phase or includes a small amount of Al<2>Cu phase.

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).

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).

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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.

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The present application provides an end cover welding apparatus (30) for a battery cell (100), an assembling method and a battery cell (100), in which, the battery cell (100) includes a case (101), and an end cover (102) which is arranged at one end of the case (101); a joint of the case (101) and the end cover (102) is provided with a first connecting seam and a second connecting seam which are arranged along a circumferential direction of the case (101); the end cover welding apparatus (30) includes a material conveying assembly (310) and a welding assembly (340), in which, the material conveying assembly (310) includes a conveying line (311), a first clamp (312) and a second clamp (313), and the first clamp (312) and the second clamp (313) are arranged at an interval on the same conveying line (311); the first clamp (312) is configured to fix the case (101) and make the first connecting seam visible; the second clamp (313) is configured to fix the case (101) and make the second connecting seam visible; and the welding assembly (340) is arranged along the conveying line (311) and is configured to weld the first connecting seam when the first clamp (312) with the battery cell (100) fixed is conveyed to the welding assembly (340), and is also configured to weld the second connecting seam when the second clamp (313) with the battery cell (100) fixed is conveyed to the welding assembly (340).

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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.

The present application discloses a tab-through device, assembly apparatus, 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 clamping mechanism and a driving mechanism. The driving mechanism is configured to drive the clamping mechanism to clamp the tab part within the accommodation chamber 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.

A terminal post welding device (500) and a battery assembling system (1), wherein the terminal post welding device (500) comprises: a battery cell fixing assembly (510), a first tab pressing plate unit (520a) and a welding assembly (515), wherein the battery cell fixing assembly (510) is used to support and fix a battery cell (100) arranged in a lying-down state; the first tab pressing plate unit (520a) comprises a first driving assembly (521) and a first tab pressing plate (522), the first tab pressing plate (522) is mounted on the first driving assembly (521), and the first driving assembly (521) is used to drive the first tab pressing plate (522) to move so that the first tab pressing plate (522) presses the tab portion (1030) of the battery cell (100) onto the terminal post (104) of the battery cell (100); the welding assembly (515) is configured to weld the tab portion (1030) and the terminal post (104) that are pressed together.

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Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …

Zusammenfassung wird geladen …