ELECTRODE PLATE COATING REMOVAL METHOD

Provided in the present application is an electrode plate coating removal method, where an electrode plate comprises a current collector and a coating coated on at least one surface of the current collector, comprising the steps of: (1) using a solvent to wet the coating of a to-be-removed area on the electrode plate; (2) shining a laser beam onto the coating of the to-be-removed area on the electrode plate, thus allowing gasification of the solvent on the coating of the to-be-removed area on the wetted electrode plate, so as to blast the coating of the to-be-removed area on the electrode plate, and allowing exposure of the current collector of the to-be-removed area on the electrode plate; and, (3) removing coating residues produced in step (2). The solvent is used to wet in advance the coating of the to-be-removed area on the electrode plate, when the laser beam is shone onto the wetted electrode plate, the solvent present in the electrode plate gasifies instantaneously upon absorbing ...

BATTERY TOP COVER PRESS-FIT DEVICE AND METHOD

Disclosed is a battery top cover press-fit device, relating to the technical field of batteries. The device comprises a press-fit main body (1); the press-fit main body (1) is arranged at the side of a battery top cover (40) that is away from a battery shell (42); the side of the press-fit main body (1) that faces the battery top cover (40) is provided with an air pressure cleaning assembly (10); and the air pressure cleaning assembly (10) is configured to have debris and gas flow together to the exterior of the battery shell (42) along a gap between the battery shell (42) and the battery top cover (40). By arranging the air pressure cleaning assembly (10), under the action of airflow, the debris flows together with gas to the exterior of the battery shell (42) along the gap between the battery shell (42) and the battery top cover (40) so that the interior of the battery shell (42) remains clean, thus avoiding the problem of short circuit in a battery (4) caused by the debris and improving ...

DEVICE AND METHOD FOR COATING SECONDARY BATTERY ELECTRODE SHEET

Disclosed are a device and method for coating a secondary battery electrode sheet, relating to the field of electrode sheet manufacture. The coating device comprises a functional layer coating mechanism (3) for coating a functional layer (24), a first drying mechanism (6) for drying the functional layer (24), an active material layer coating mechanism (5) for coating an active material layer (22), a second drying mechanism (7) for drying the active material layer (22) and a removing and collecting mechanism (8) for removing and collecting the functional layer (24), which are successively and in order arranged on a flow path of a current collector (21). The coating method is a method for coating an electrode sheet using the above-mentioned device for coating a secondary battery electrode sheet. As compared with the prior art, the device for coating a secondary battery electrode sheet achieves the accomplishment of reserving a tab welding area in any position of the electrode sheet in the ...

SECONDARY BATTERY CORE

Provided in the present invention is a secondary battery core, which comprises: an anode plate, anode tabs, a cathode plate, cathode tabs, and a separator film. The anode plate comprises: an anode current collector and an anode film. The cathode plate comprises: a cathode current collector and a cathode film. The anode plate is provided with: an anode tab accommodating groove for accommodating the anode tabs. The cathode plate is provided with: a cathode tab accommodating groove for accommodating the cathode tabs. The anode tabs are provided in pairs, the two anode tabs in each pair respectively are arranged at either the upper or lower side of an anode winding start section of the anode plate in the thickness direction of the secondary battery core; and/or, the cathode tabs are provided in pairs, the two cathode tabs in each pair respectively are arranged at either the upper or lower side of a cathode winding start section of the cathode plate in the thickness direction of the secondary ...

ELECTRODE PLATE COATING REMOVAL METHOD

Provided in the present invention is an electrode plate coating removal method, where an electrode plate comprises a current collector and a coating coated on at least one surface of the current collector, comprising the steps of: (1) a to-be-removed area on the electrode plate is fixed by means of vacuum absorption onto a surface opposite a current collector surface on which the to-be-removed area is located; (2) shining a laser beam onto a coating of the to-be-removed area on the electrode plate from a side of the current collector surface at which the to-be-removed area is located so as to blast the coating of the to-be-removed area on the electrode plate, thus exposing the current collector located at the to-be-removed area on the electrode plate; and, (3) removing coating residues produced during step (2). First, the to-be-removed area on the electrode plate is fixed by means of vacuum absorption, and then the laser beam is employed to remove the coating of the to-be-removed area, ...

SECONDARY BATTERY CELL

Provided is a secondary battery cell, which comprises an anode pole piece, an anode pole tab, a cathode pole piece, a cathode pole tab and an isolation membrane. The anode pole piece comprises an anode current collector and an anode diaphragm; the cathode pole piece comprises a cathode current collector and a cathode diaphragm; and the isolation membrane is arranged between the anode pole piece and the cathode pole piece. An anode pole tab accommodating groove is formed on the anode pole piece, with the anode current collector being arranged at the bottom thereof and the anode diaphragm being arranged at the peripheral side thereof; and the anode pole tab is accommodated in the anode pole tab accommodating groove and is electrically connected to the anode current collector at the anode pole tab accommodating groove. A cathode pole tab accommodating groove is formed on the cathode pole piece, with the cathode current collector being arranged at the bottom thereof and the cathode diaphragm ...

ELECTROCHEMICAL ENERGY STORAGE DEVICE

The present invention provides an electrochemical energy storage device comprising: a battery core, electrolyte and a packaging shell. The electrochemical energy storage device further comprises glue material located between the battery core and the packaging shell. The glue material comprises an adhesive layer and a protective layer. The adhesive layer is directly or indirectly bonded to the outer surface of the battery core, and the side of the adhesive layer away from the battery core is an adhesive surface; the protective layer is disposed on the adhesive surface of the adhesive layer, and the protective layer is wholly or partially dissolved or swollen in the electrolyte to expose the adhesive surface of the adhesive layer, and then the adhesive layer bonds the battery core and the packaging shell together. The protective layer is of polar molecule, wherein the polar molecule comprises one or more of -F, -CO-NH-, -NH-CO-NH- and -NH-CO-O-. The electrochemical energy storage device of ...

ELECTROCHEMICAL ENERGY STORAGE DEVICE

Provided is an electrochemical energy storage device, comprising a battery cell, an electrolyte and a packing shell. The electrochemical energy storage device further comprises an adhesive material located between the battery cell and the packing shell. The adhesive material comprises an adhesive layer and a protective layer. A surface of the adhesive layer, which is directly or indirectly arranged on an outer surface of the battery cell and is far away from the cell, is an adhesive surface; or a surface of the adhesive layer, which is directly or indirectly arranged on an inner surface of the packing shell and is close to the battery cell, is an adhesive surface; and the protective layer is arranged on the adhesive surface of the adhesive layer, the protective layer is noncohesive at a normal temperature and pressure, after the protective layer is fully or partially dissolved in the electrolyte, the adhesive surface of the adhesive layer is exposed to bond the battery cell with the packing ...

ELECTRODE PLATE COATING REMOVAL APPARATUS

An electrode plate coating removal apparatus. An electrode plate comprises a current collector and a coating coated on at least one surface of the current collector. The electrode plate coating removal apparatus comprises: a transfer system for transferring an electrode plate to be removed of coating; at least one wetting mechanism, where each wetting mechanism is provided at one surface of a to-be-removed coating of the electrode plate being transferred by the transfer system and uses a solvent to wet the coating of a to-be-removed area on the one surface of the electrode plate; a laser removal system; and, a control system communicatively connected to the transfer system, all wetting mechanisms, and the laser removal system. The laser removal system comprises: at least one laser emitting head for emitting a laser beam and projecting onto the coating of the to-be-removed area on the corresponding surface on the electrode plate wetted by the wetting mechanism, thus allowing gasification ...

ELECTROCHEMICAL ENERGY STORAGE DEVICE AND METHOD FOR PREPARING ELECTROCHEMICAL ENERGY STORAGE DEVICE

Provided are an electrochemical energy storage device and a method for preparing the electrochemical energy storage device. The electrochemical energy storage device comprises a cell, an electrolyte and a packaging shell. The electrochemical energy storage device further comprises an adhesive layer. The adhesive layer is located between the cell and the packaging shell, and fixedly connects the cell to the packaging shell. The adhesive layer is in a flow state before curing and the adhesion to the packaging shell is less than or equal to 0.1 N/mm, and the cell and the packaging shell are fixedly connected after the adhesive layer having been cured. The electrochemical energy storage device can improve the safety problem caused by abuse without influencing other properties thereof.

DEVICE FOR CLEANING COATING ON LITHIUM-ION BATTERY ELECTRODE SHEET

Provided is a device for cleaning a coating on a lithium-ion battery electrode sheet, comprising a conveying system (1) for conveying an electrode sheet (6) and a laser system (2).The laser system comprises at least one laser emission head (21) for emitting a laser beam and projecting same onto the electrode sheet, and a light beam shaping mechanism (22) for homogenizing the energy of the laser beam emitted from the laser emission head. The laser emission head and the light beam shaping mechanism are electrically connected.The cleaning device can homogenize the energy of the laser beam through setting the light beam shaping mechanism, which neither damages a foil in the electrode sheet so as to improve the welding quality of an electrode tab, nor causes coating residues so as to improve the cleaning quality; in addition, the energy can be effectively used to achieve a maximum utilization of the laser energy.

SECONDARY BATTERY CELL AND WINDING FORMATION SYSTEM THEREOF

A secondary battery cell (1) and a winding formation system (2) thereof. The secondary battery cell (1) comprises an anode pole piece (101), an anode tab (102), a cathode pole piece (103), a cathode tab (104) and an isolation film (105). The winding formation system (2) of the secondary battery cell comprises a working platform (201), a winding mechanism (202), an anode pole piece payout roller (203), an anode pole piece cleaning mechanism (204), an anode pole piece die cut mechanism (205), an anode tab feeding mechanism (206), an anode tab connecting mechanism (207), an anode pole piece conveying mechanism (208), a cathode pole piece payout roller (209), a cathode pole piece cleaning mechanism (210), a cathode pole piece die cut mechanism (211), a cathode tab feeding mechanism (212), a cathode tab connecting mechanism (213), a cathode pole piece conveying mechanism (214), a first isolation film payout roller (215 A), a second isolation film payout roller (215 B), a first isolation film ...

リチウム電池

Lithium ion battery encapsulates shell and contains lithium ion battery of this encapsulation shell

... 本申请涉及锂离子电池领域，具体讲，涉及种锂离子电池封装外壳及含有该封装外壳的锂离子电池。封装外壳包覆于锂离子电池的裸电芯外，所述封装外壳由内至外依次为密封壳层、金属镀膜层和塑料镀膜层，金属镀膜层在所述封装外壳的折边处和折角处的厚度不小于所述金属镀膜层在所述封装外壳的平面处的厚度。本申请的封装外壳结构的各层材料是在产品制造或包装过程中分别加工到产品外部，因此，在其折边处和折角处的厚度和强度保持不变，避免了在冲压程序中带来的封装缺陷，从而大大提高了产品的封装可靠性。外壳无拉伸变形和起皱，避免带来的外观缺陷，改善了产品的外观，提升了电池能量密度。 ...