CATL Patente

Disclosed are a coating system and a coating method. The coating system includes: a first detector (4), a second detector (5), a control device, and a deviation correction device, where the first detector (4) is configured to detect first coating information of a first surface of a substrate; the second detector (5) is configured to detect second coating information of a second surface of the substrate, the first surface being one surface of the substrate, and the second surface being the other surface of the substrate; the control device is configured to calculate a deviation value for both sides of the first surface and the second surface according to the first coating information and the second coating information, and send a deviation correction instruction to the deviation correction device according to the deviation value; and the deviation correction device is configured to perform coating deviation correction on the substrate according to the deviation correction instruction.

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The present application discloses a battery cell, a battery, and an electric apparatus. The battery cell includes: a housing, the housing including a first surface, a second surface, a third surface, and a flange, where the flange is disposed around the first surface and connected to the first surface, the first surface and the third surface are opposite each other, and the second surface is connected between the flange and the third surface; and an insulating film, wrapped around an exterior of the housing, the insulating film wrapping around at least a portion of the first surface, at least a portion of the flange, at least a portion of the third surface, and at least a portion of the second surface. The insulating film is folded from the flange to the second surface to form a first folded region, and the insulating film is folded from the third surface to the second surface to form a second folded region. Along a direction from the first surface to the third surface, a dimension of the first folded region is smaller than a dimension of the second folded region. The insulating film is also capable of sufficiently wrapping around the housing when the housing is provided with a flange.

Disclosed are a method for manufacturing a battery cell (20), a battery cell (20), a battery (100), and an electric apparatus. The method for manufacturing a battery cell (20) includes: connecting an electrode lead-out member (221) of a bare cell (22) to an electrode component (25); bending the connected electrode lead-out member (221) to allow the bare cell (22) to enter an accommodating space (212) of a housing (21) through an opening (2121), the opening (2121) of the housing (21) being a side with the largest area of the housing (21); and connecting a top cover (24) to the housing (21) to close the opening (2121). The bare cell (22) of the battery cell (20) can be conveniently installed in situations where the electrode component (25) is not disposed on the top cover (24).

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The present application provides a battery cell, a battery, and an electrical apparatus, which belongs to the field of battery technologies. The battery cell includes a case assembly, an end cover, and an electrode assembly. The case assembly is provided with an accommodating cavity having an opening formed therein. The case assembly has a first electrode lead-out portion and a second electrode lead-out portion. In a first direction, the first electrode lead-out portion and the second electrode lead-out portion are both located at one end of the case assembly away from the opening. The end cover covers the opening. The electrode assembly is accommodated in the accommodating cavity, and the electrode assembly includes a main body part, a first tab, and a second tab. The first tab and the second tab have opposite polarities. The first tab and the second tab are both arranged at one end of the main body part away from the end cover in the first direction. The first tab and the second tab are electrically connected to the first electrode lead-out portion and the second electrode lead-out portion, respectively. The end cover is provided with a pressure relief portion, and the pressure relief portion is configured to be capable of relieving an internal pressure of the battery cell. Therefore, it is conducive to reducing the difficulty of arranging the pressure relief portion on the battery cell.

A battery cell, a battery, and an electrical apparatus are disclosed in the present application. The battery cell includes a shell, an electrode terminal, an electrode assembly, a first adapter, and a second adapter. The shell has a first wall. The electrode terminal is mounted on the first wall in an insulated manner. The electrode assembly includes a main body part, a first tab, and a second tab. The first tab and the second tab have opposite polarities. In a thickness direction of the first wall, the first tab and the second tab are both arranged at one end of the main body part facing the first wall. The first adapter includes a first connecting portion and a second connecting portion, the first connecting portion is connected to the first wall, and the second connecting portion is connected to the first tab. The second adapter connects the electrode terminal and the second tab. In the thickness direction of the first wall, an orthographic projection of the first adapter does not overlap an orthographic projection of the second adapter, and in the thickness direction of the first wall, an orthographic projection of the first connecting portion does not overlap an orthographic projection of the second tab. The technical solution provided in the present application is capable of improving the reliability of batteries.

An electrolyte, a secondary battery, and an electric device. The electrolyte comprises a component, a nitrile solvent. The nitrile solvent comprises a compound represented by formula (1): wherein: L is selected from any one of C(R₁R₂), O, Si(R₃R₄), B(R₅), P(R₆R₇R₈), and N(R₉); R₁-R₉ are each independently selected from at least one of H, halogen, substituted or unsubstituted alkyl having 1-3 carbon atoms, alkoxy having 1-3 carbon atoms, amino, and cyano, and R₁ and R₂ are not cyanos and H; R₁₁ is an alkane chain containing 1-4 carbon atoms; R₁₂-R₁₄ are each independently selected from at least one of H, halogen, substituted or unsubstituted alkyl having 1-3 carbon atoms, alkoxy having 1-3 carbon atoms, amino, and cyano; and when L is C(R₁R₂), R₁₂-R₁₄ are not cyanos.

The present application provides an electrode assembly, a battery cell, a battery and an electrical apparatus, belonging to the technical field of batteries. The electrode assembly includes a main body part, a first tab and a second tab. The main body part is cylindrical. The polarities of the first tab and the second tab are opposite, the first tab and the second tab are arranged at the same end of the main body part along an axial direction of the main body part, and the electrical conductivity of the first tab is smaller than the electrical conductivity of the second tab. Along the axial direction of the main body part, the first tab has a first surface away from the main body part, and the second tab has a second surface away from the main body part, the area of the first surface being larger than the area of the second surface. By setting the area of the first surface of the first tab to be larger than the area of the second surface of the second tab, it is convenient to distinguish and identify the first tab and the second tab with different polarities during the assembly of a battery cell, and the electrode assembly can be assembled without secondary positioning, thereby being conducive to reducing the difficulty in the subsequent assembly of the electrode assembly.

The present application discloses a limiting mechanism (100) and an energy storage device. The limiting mechanism (100) comprises: a connecting seat (10) provided with a guide structure (1101), wherein the guide structure (1101) is arranged in the length direction of the connecting seat (10); a connecting shaft (20) in sliding fit with the guide structure (1101); and a connecting arm (30) connected to the connecting shaft (20). A locking position (1102) for locking the position of the connecting shaft (20) in the length direction of the connecting seat (10) is further provided on the connecting seat (10). When the connecting arm (30) and the connecting seat (10) are unfolded, the connecting shaft (20) can slide along the guide structure (1101) to adapt to the unfolding angle between the connecting arm (30) and the connecting seat (10), and when the connecting shaft (20) slides to the locking position (1102), the locking position (1102) can lock the position of the connecting shaft (20), so that the position of the connecting shaft (20) is kept stable, and the unfolding angle between the connecting arm (30) and the connecting seat (10) is locked, thereby locking the opening degree of a door (300).

The present application provides a battery cell, a battery, and an electrical apparatus, which belongs to the field of battery technologies. The battery cell includes a shell, an electrode terminal, and an electrode assembly. The shell has a wall portion. The electrode terminal is mounted on the wall portion in an insulated manner. The electrode assembly is accommodated in the shell, and the electrode assembly includes a main body part, a first tab, and a second tab. The first tab and the second tab have opposite polarities. In a thickness direction of the wall portion, the first tab and the second tab are both arranged at one end of the main body part facing the wall portion. The wall portion has a first surface facing the electrode assembly, a connecting portion is arranged to protrude from the first surface, the connecting portion is electrically connected to the first tab, and the electrode terminal is electrically connected to the second tab. This type of battery cell is conducive to optimizing the height of the first tab protruding from the main body part, and is capable of improving the contact effect between the connecting portion and the first tab, and there is no need to arrange a component of a special-shaped structure connecting the wall portion and the first tab between the wall portion and the first tab, so as to reduce the difficulty of assembling the battery cell.

The present application relates to a pole piece folding control method and apparatus, a pole piece folding apparatus, and a battery production system. During the folding process of a pole piece group, a conveying component is controlled to operate, and the pole piece group is driven to move towards a stacking platform. When a lamination area on the stacking platform starts to fold or has been folded, at least one of the conveying component and the stacking plaform is controlled to move such that the distance between a conveying end of the conveying component and at least part of an operating surface of the stacking platform is pulled open. In this way, a clearance space can be provided for folding of the lamination area, thereby facilitating stress relief of the lamination area during folding, reducing a pulling force of the lamination area in a folded state on a non-folded lamination area, and reducing a degree of bending and warping of the lamination area at a folding position. Thus, the probability of abnormal gaps being generated at the folding position of a laminated structure is reduced, thereby effectively reducing the probability of lithium deposition at the folding position of the electrode, and improving the quality of the laminated battery.

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Provided are a battery cell (20), a battery (100), and an electric apparatus. The battery cell (20) includes: a casing (21), where the casing (21) has a plurality of wall portions (211), the plurality of wall portions (211) include a first wall (201), the first wall (201) includes a main body portion (2011) and an edge portion (2012) connected to the main body portion (2011), the edge portion (2012) is connected to an adjacent wall portion (211), and the wall thickness of the edge portion (2012) is greater than the wall thickness of the main body portion (2011); an electrode assembly, where the electrode assembly is disposed in the casing (21); and an electrode terminal, where the electrode terminal is disposed on the wall portion (201) and is electrically connected to the electrode assembly.

The present application discloses a battery cell, a battery, and an electrical device. The battery cell comprises a casing, an electrode terminal, an electrode assembly, and a first insulating member. The casing has a first wall and a second wall, and the second wall surrounds the edge of the first wall. The electrode terminal is mounted on the first wall in an insulating manner. The electrode assembly is accommodated in the casing. The electrode assembly comprises a main body portion, a first tab and a second tab, and the first tab and the second tab have opposite polarities. In a thickness direction of the first wall, the main body portion has a first end surface close to the first wall, and the first tab and the second tab are both provided on the first end surface. The first tab is electrically connected to the electrode terminal, and the second tab is electrically connected to the casing. The first insulating member is provided on the outer peripheral surface of the main body portion, and a portion of the first insulating member is located between the first tab and the second wall, so that the first tab and the second wall are insulated and isolated from each other. The technical solution provided in the present application can improve the reliability of the battery.

The present application relates to a bonding assembly, a battery and an electric device. The bonding assembly comprises a main body member and a connecting member, wherein the main body member comprises first rubber; and the connecting member is connected to at least one side of the main body member in its own thickness direction, and the connecting member comprises a base material, a connecting layer and a bonding layer, the connecting layer being arranged on the side of the base material facing the main body member, and bonding the base material to the main body member, the connecting layer comprising second rubber, the second rubber and the first rubber being made of the same material or different materials, and the bonding layer being bonded to the side of the base material facing away from the connecting layer. When used in a battery, the bonding assembly can improve the structural stability of the battery.

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A battery and an electrical device. The battery comprises an electrolyte solution. The electrolyte solution comprises a first diluent, the first diluent comprising at least one of the compounds represented by formulas (I) to (IV),where R₁₁, R₁₂, R₁₃, R₁₄, R₂₁, R₂₂, R₂₃, R₂₄, R₃₁, R₃₂, R₃₃, R₃₄, R₃₅, R₄₁, R₄₂, R₄₃ and R₄₄ each independently comprise any one of H, F, Cl, Br, I, alkyl having 1-3 carbon atoms, and haloalkyl having 1-3 carbon atoms, and at least one of R₁₁, R₁₂, R₁₃ and R₁₄ comprises any one of haloalkyl having 1-3 carbon atoms, F, Cl, Br and I. The battery comprising the electrolyte solution of the present application has good cycling life.

A battery cell (200), a battery (B), and an electric device are provided. The battery cell (200) has a battery housing (220), where a pole assembly (100) is disposed on a first wall (210) of the battery housing (220), the pole assembly (100) includes a pole body (110), and the pole body (110) includes: a bearing portion (111), the bearing portion (111) being inserted through a mounting hole (211) of the first wall (210); and a bending portion (112), the bending portion (112) being connected to one end of the bearing portion (111) in a central axis direction (C), bent relative to the bearing portion (111), and disposed on one side of the first wall (210), and a bending resistance strength of the bending portion (112) being less than a bending resistance strength of the bearing portion (111). The battery (B) includes the battery cell described above. The electric device includes the battery (B) described above.

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