3414results about "Wound/folded electrode electrodes" patented technology

A rechargeable battery includes a wound-type electrode assembly, a heat pipe, a can, and a cap plate. The heat pipe is disposed inside of the electrode assembly at a distance from a wound center of the electrode assembly, and the heat pipe surrounds the wound center. The can includes an internal space in which the electrode assembly and the heat pipe are positioned. The cap plate is coupled to an end of an opening of the can to close and seal the can, the cap plate is connected heat pipe, and the cap plate is configured to provide dissipation of heat from the heat pipe.

A cylindrical secondary battery including an electrode assembly including a negative electrode plate and a positive electrode plate; a cylindrical can accommodating the electrode assembly and including a terminal hole in one side of the cylindrical can and an open inlet in another side of the cylindrical can; a terminal coupled to the cylindrical can through the terminal hole; and a negative electrode current collector in the cylindrical can and electrically connecting the cylindrical can to the negative electrode plate. The negative electrode current collector includes a notch groove or a cutting hole configured to be cut in response to an increase in pressure in the cylindrical can.

A cylindrical secondary battery includes an electrode assembly including a first electrode plate, a separator, and a second electrode plate; a case accommodating the electrode assembly and having a lower end that is open and electrically coupled to the second electrode plate; a first current collector plate between a top surface of the electrode assembly and the case and that is electrically connected to the first electrode plate; a terminal passing through a top surface of the case and including a lower end electrically and mechanically coupled to a top surface of the first current collector plate; and a cap plate configured to seal the lower end of the case. The terminal includes a lower terminal including a welding groove having a depth from a top surface of the terminal in a downward direction; and an upper terminal in the welding groove of the lower terminal.

A secondary battery includes an electrode assembly including a negative electrode plate including a negative electrode leading end uncoated portion, a positive electrode plate including a positive electrode leading end uncoated portion, and an anti-deformation portion attached to the positive electrode leading end uncoated portion, an end of the positive electrode leading end uncoated portion and an end of the anti-deformation portion being located ahead of an end of the negative electrode leading end uncoated portion, a case accommodating the electrode assembly, and electrically coupled to the negative electrode plate, and a cap assembly sealing the case.

A power tool system includes a power tool, a sensor, and an electronic controller of the power tool. The power tool includes a power tool housing, a motor housed within the power tool housing, and a pack interface coupled to the power tool housing. The pack interface receives a power tool battery pack having a corresponding tool interface. The sensor senses an electrical parameter corresponding to a power tool battery pack coupled to the pack interface. The electronic controller of the power tool controls the power tool battery pack to discharge current; receives an output of the sensor when the power tool battery pack is controlled to discharge current; generates a temperature estimate by processing the output of the sensor using a thermal model stored on the memory; and generates a temperature warning signal in response to the temperature estimate exceeding a temperature threshold.

This method, for joining a collector plate and a winding electrode group 2 comprising a separator and electrode plate stacked and wound together, involves pressing a jig 32 against the ends of the electrode plates, which are arranged in the radial direction of the electrode group 2, displacing the jig 32 on a curved trajectory so as to bend the ends such that the amount of displacement towards the electrode group 2 gradually increases and the amount of displacement in the radial direction gradually deceases, and joining the bent ends and the electrode plates.

Provided in the present application are an electrode assembly, a battery cell, a battery and an electrical device. The electrode assembly comprises a first electrode sheet and a second electrode sheet which have opposite polarities. The first electrode sheet comprises a first electrode sheet body, wherein the first electrode sheet body comprises a first current collecting body and first active material layers, the first current collecting body comprising two first surfaces opposite each other in the direction of thickness of the first current collecting body, and a first end face connecting the two first surfaces, and the first active material layers being arranged on the first surfaces. The electrode assembly further comprises an insulating member connected to the first electrode sheet body, wherein at least part of the insulating member is arranged on the outer side of the first end face in a first direction, the first direction being perpendicular to the direction of thickness. The insulating member can separate burrs on the first end face from the second electrode sheet, thereby reducing the risk of conduction between the burrs and the second electrode sheet and reducing the possibility of thermal runaway caused by a short circuit, improving the reliability of the battery cell.

A non-aqueous electrolyte secondary battery comprises: an electrode body obtained by winding a negative electrode (12) in which a negative electrode mixture layer (32) is formed on a negative electrode core body (30) and a positive electrode, with a separator therebetween; and a non-aqueous electrolyte. The non-aqueous electrolyte secondary battery is characterized in that: the negative electrode (12) has, at the winding direction inner-end side of the electrode body, a non-facing part (12a) which does not face the positive electrode with the separator therebetween; the non-facing part (12a) has a mixture non-facing part (12c) in which the negative electrode mixture layer (32) is formed on at least one surface of the negative electrode core body (30), from the winding direction outer end of the non-facing part (12a) and toward the winding direction inner side; and the average value of a mixture surface distance which is between the mixture non-facing part (12c) and the negative electrode (12e) positioned one turn outward of the mixture non-facing part (12c) is not less than 90 µm.

A cylindrical battery, which includes an electrode assembly including a first electrode tab and a second electrode tab; a battery housing configured to accommodate the electrode assembly through an open portion and connected to the first electrode tab; a first current collecting plate having a support portion disposed on the electrode assembly, at least one first tab coupling portion extending from the support portion, and at least one housing coupling portion extending from an end of the first tab coupling portion; a second current collecting plate having a rim portion disposed on the electrode assembly, a second tab coupling portion extending inwardly from the rim portion, and a terminal coupling portion spaced apart from the second tab coupling portion; a cap plate configured to seal the open portion; and a battery terminal coupled with the terminal coupling portion.

The invention provides an electrode assembly, a battery monomer, a battery and a power utilization device. The electrode assembly comprises a first pole piece and a second pole piece which are opposite in polarity. The first pole piece comprises a first pole piece main body, the first pole piece main body comprises a first current collecting main body and a first active material layer, the first current collecting main body comprises two first surfaces which are oppositely arranged along the thickness direction of the first current collecting main body and a first end surface which is connected with the two first surfaces, and the first active material layer is arranged on the first surfaces. The electrode assembly further comprises an insulating part connected to the first pole piece body, at least part of the insulating part is arranged on the outer side of the first end face in the first direction, and the first direction is perpendicular to the thickness direction. The insulating part can separate the burrs on the first end face from the second pole piece, so that the risk of conduction between the burrs and the second pole piece is reduced, the possibility of thermal runaway caused by short circuit is reduced, and the reliability of the single battery is improved.

The invention discloses a tab protection interlayer, a full-tab battery cell and a cylindrical battery with a shell electrode, a non-adhesive area and an adhesive area are arranged on the tab protection interlayer, so that the non-adhesive area is attached to a tab but is not adhered to the tab, and the adhesive area is adhered to a small part of tab root area and is adhered to the end part of a roll core main body at the same time; the probability that the full tab is pulled by the adhesive tape to rebound is reduced to a great extent. When the full tab is kneaded, the interlayer can be pressed towards the center direction of the roll core to form a bending structure, so that the area of an extruded area of the interlayer is reduced, and the interlayer can be adhered to a small part of area of the root part of the tab and an adhesive area on the roll core main body by virtue of the bending structure, so that the roll sleeve and wrinkles are effectively prevented from being extruded by a shell. And the interlayer can also form an elastic sealing ring structure between the shell and the roll core main body, so that the electrolyte is prevented from leaking to the negative electrode end of the cylindrical battery with the positive electrode shell by combining the adhesion sealing effect of the adhesive glue of the interlayer, and the short circuit between the tab and the shell is avoided.

A battery cell includes a housing and an electrode assembly, where the electrode assembly is accommodated within the housing, the housing is cylindrical, a height of the housing is H1, and a radius of the housing is R1. The housing includes a first end wall, a second end wall, and a side wall, where the first end wall and the second end wall are oppositely disposed along a height direction of the housing, and the side wall connects the first end wall and the second end wall. A sum of thicknesses of the first end wall and the second end wall is a, and a thickness of the side wall is b, satisfying: (R1−b)2*(H1−a) / (R12*H1)≥96%.

The present application discloses a battery cell, a battery, and an electrical device. The battery cell includes a shell, an electrode assembly, and an insulating member. The electrode assembly is accommodated in the shell and includes electrode plates and a separator, which are arranged in a stacked manner. The insulating member is attached to an outer side of the electrode assembly, and the surface roughness of at least some regions of an outer surface of the insulating member away from the electrode assembly is greater than the surface roughness of the separator.

The present application discloses a battery cell, a secondary battery, and an electric device. The battery cell comprises a plurality of electrode sheets; each electrode sheet comprises a current collector and active substance coatings; the electrode sheet has a first region covered with the active substance coatings and a second region not covered with the active substance coatings; the first region is provided with a clearance notch; the second region forms a tab of the battery cell; among the plurality of stacked electrode sheets, for two adjacent electrode sheets, the first region of one electrode sheet is provided with a clearance notch so as to expose the second region of the other electrode sheet; the width of the electrode sheet is W mm, the area of the clearance notch is S1 mm2, the area of the second region is S2 mm2, and the thickness of the battery cell is H; when H is greater than 7 mm, S1+S2＜A*W is satisfied, and A is 3.6 mm; or, when H is less than or equal to 7 mm, S1+S2＜B*W is satisfied, and B is 1.6 mm. By means of such design, when a bare battery cell is formed by stacking, the tabs are accommodated in the main body region of the bare battery cell, and there is no need to perform multi-tab transfer welding, thereby improving space utilization; moreover, by setting the maximum value of S1+S2, it is ensured that the overall energy density of the battery cell is increased.

The invention provides a battery monomer, and a coating method and coating equipment of an electrode assembly, and belongs to the field of batteries. The battery monomer comprises an electrode assembly and an insulating film, the insulating film is wound and coated on the periphery of the electrode assembly, the insulating film is provided with a winding starting end and a winding ending end along the self-winding direction, and the winding starting end and the winding ending end are at least partially overlapped; the insulating film comprises a gluing area and an empty film area, at least one end of the gluing area in the winding direction is connected with the empty film area, the gluing area is arranged on at least part of the periphery of the electrode assembly, and at most one of the winding starting end and the winding ending end comprises the part of the gluing area. According to the scheme, the insulating film can play a role in insulation and protection, and meanwhile, the binding of the electrode assembly is not too tight.

Battery comprising a housing (1), a battery cell (2), a holder (3) and a support element (4), wherein the battery cell (2), the holder (3) and the support element (4) are located in the housing (1), wherein the battery cell (2) comprises a cell body (21) and a terminal tab, wherein the holder (3) is located on one side of the battery cell (2) on which the terminal tab is provided, wherein the housing (1) has a first wall surface (1a), wherein the holder (3) comprises two holder sections (31), wherein one end of the two holder sections (31) is attached to the first wall surface (1a) and the other end extends in a direction away from the first wall surface (1a), wherein in a first direction the two holder sections (31) are spaced apart from each other and a terminal tab receiving space (32) is formed between them, wherein the terminal tab extends from the cell body (21) into the terminal tab receiving space (32),wherein the support element (4) is used for installation in the connection lug receiving space (32), wherein in the first direction the maximum length of the support element (4) is L1 and a distance between the two mounting sections (31) is L2, where L1 > L2, wherein the support element (4) is pressed against the two mounting sections (31) with both sides after its installation in the connection lug receiving space (32).

The present application relates to a defective electrode sheet rejection method, a die cutting device, a winding device and a battery production system. The defective electrode sheet rejection method comprises the following steps: performing strip splicing trace detection on an electrode sheet material strip having a plurality of continuously distributed electrode sheet units; on the basis of detecting that the electrode sheet material strip has a strip splicing trace, marking two defect identifiers spaced apart by a first preset distance D1 at an upstream position of the strip splicing trace on the electrode sheet material strip; performing defect identifier detection on the electrode sheet material strip during the winding process thereof into an electrode assembly; and on the basis of detecting that the electrode sheet material strip has two defect identifiers, independently winding an electrode sheet unit having the defect identifiers and an adjacent electrode sheet unit located upstream of the electrode sheet unit having the defect identifiers. The defective electrode sheet rejection method in the present application can solve the problem in respect of relatively high loss in electrode sheet material strips, thereby reducing the production cost of batteries and lowering the defect rate of the batteries.

Example embodiments include electrode assemblies and all-solid-state batteries. The electrode assembly includes a first solid electrolyte layer, a positive electrode layer, a second solid electrolyte layer, and a negative electrode layer that are disposed along a radial direction of the electrode assembly. The positive electrode layer includes a positive electrode current collector, a first positive electrode active material layer on a first surface of the positive electrode current collector and in contact with the first solid electrolyte layer. A first width of the first positive electrode active material layer is less than a second width of the first solid electrolyte layer, a first buffer structure adjacent to a first side of the first positive electrode active material layer, and a second buffer structure adjacent to a second side of the first positive electrode active material layer.

The present invention relates to a multilayer conductive tape, including: an adhesive layer; an electrically conductive layer positioned on one side of the adhesive layer; an insulating layer positioned on one side of the electrically conductive layer; and a protective layer for protecting an outer surface of the insulating layer.

The invention discloses a cylindrical battery and a battery pack. The cylindrical battery comprises: a housing having an opening formed at one end in the axial direction thereof; the electrode assembly is arranged in the shell; the cover plate is installed on the opening in a sealed mode, and the cover plate comprises a first weak structure; the switching piece is arranged between the electrode assembly and the cover plate, the switching piece comprises a first switching part and a second switching part, the first switching part is electrically connected with a tab of the electrode assembly, and the second switching part is fixed and electrically connected with the shell; a second weak structure is arranged on the first adapter part; the calculation formula of the radius R of the second weak structure is shown in the specification. The final position of the second weak structure is determined through a calculation formula, at least part of the second weak structure does not fall into the area where the pressure relief part is located after deformation, then the second weak structure is supported by the edge of the fixing part so as to be prone to deformation, and therefore the beneficial technical effects of improving safe pressure relief and discharging efficiency and stability of the anti-explosion valve are achieved.

Provided is an electrical storage device that is compact and can be manufactured easily, while allowing for use of higher voltages.　In an electrical storage device 1, a winding structure 20 comprises: a central electrode body 21 in which a first extending part 21b and a second extending part 21c extending from either side of a central portion 21a are wound around the central portion in the same direction; a first electrode body 22 electrically connected to a first external terminal 6 and extending toward an outer peripheral side from a vicinity of the central portion; a second electrode body 23 electrically connected to a second external terminal 7 and extending toward the outer peripheral side from a vicinity of the central portion; a first separator 24 disposed between the central electrode body and the first electrode body; and a second separator 25 disposed between the central electrode body and the second electrode body.

The invention provides a manufacturing method of a cylindrical battery and a winding device of a roll core, the cylindrical battery comprises a shell and the roll core, the manufacturing process of the roll core comprises the following steps: a positive plate, a negative plate and a diaphragm are wound to obtain a first core roll, and the diameter of the first core roll is smaller than the designed diameter of the roll core; obtaining a difference value between the diameter of the first core roll and the designed diameter of the roll core; and if the difference value is larger than the preset threshold value, a coating layer with the adjustable thickness is arranged on the periphery of the first core roll to form the second core roll, the difference value between the diameter of the second core roll and the designed diameter is made to be within the design tolerance range, and the technical problem that the roll core consistency is poor can be solved.

The invention belongs to the technical field of battery processing, and discloses a roll core and a full-tab cylindrical battery. The roll core is formed by winding a positive plate, a diaphragm, a negative plate and a diaphragm which are stacked in sequence, a through hole is formed in the center of the roll core, a positive electrode active material and a first blank foil located at the axial end part of the roll core are arranged on a positive electrode foil of the positive plate, and at least the first blank foil is bent towards the center of the roll core and is overlapped to form a flat surface; the roll core further comprises a first insulating coating, at least the outer side of the positive plate is coated with the first insulating coating, the starting end of the first insulating coating is flush with the starting end of the first blank foil, the distance between the top of the first blank foil and the top of the negative plate is L, and the distance between the upper boundary of the first insulating coating and the top of the negative plate is L1, the inward bending width of the first blank foil is defined as W, and L / 3 < = L1 < = L-W. The roll core and the full-tab cylindrical battery can effectively prevent the blank foil of the positive electrode from being bent outwards at the starting end to be in contact with the negative plate to cause short circuit, and the qualification rate of the roll core is improved.

An energy storage device, such as a lithium-ion battery, without tabs connecting the electrode jelly roll to the can, and a method for making the same, is described. A series of flags may be cut, bent, and interleaved with one another to form connection points for upper and lower collector plates within the can. The upper and lower collector plates can be welded directly to the interleaved flags to form connection points for the anode and cathode in the energy storage device.

A battery cell, a battery, and an electric apparatus are provided. The battery cell includes an electrode assembly comprising a first electrode plate, a second electrode plate, and a spacer. The first and second electrode plates have opposite polarities, with the spacer positioned between them. The electrode assembly is wound along a winding direction to form a winding structure. The first electrode plate has multiple first tabs bent at an end portion to form a first tab stacking structure, while the second electrode plate has multiple second tabs bent to form a second tab stacking structure. A first conductive member is welded to the first tab stacking structure, and a second conductive member is welded to the second tab stacking structure. In a direction parallel to the winding axis, a gap is present between the spacer and at least one bending position of the first or second tabs.

The application discloses a battery monomer, a battery device and an electric equipment. The battery monomer comprises a shell assembly, a pole core arranged in the shell assembly, and a plurality of pole pieces. Two ends of each pole piece are respectively provided with a tab and a slitting edge. The plurality of pole pieces are divided into first pole pieces and second pole pieces with opposite polarities. The first pole pieces and the second pole pieces are arranged in sequence. The tabs of the first pole pieces and the tabs of the second pole pieces are located on different sides of the pole core. The tabs on the same side are electrically connected with a first connecting surface of a connecting piece. On the same side of the pole core, the distance between the first connecting surface and the slitting edge is L. The number of pole pieces with the same polarity is n. The number of bending layers of the tab is m. The thickness of the battery monomer is T. The thickness of the pole piece is t. The battery monomer satisfies the following relationship: 0.5 <= N = (L-5-0.1*T / 2) / (n*m*t) <= 15. Thus, the tab can have a good state after being bent, and the safety and reliability of the battery monomer are improved.

An electrode assembly includes a first electrode current collector having a sheet shape, a second electrode current collector having a sheet shape, a separator interposed between the first electrode current collector and the second electrode current collector, the first electrode current collector, the second electrode current collector, and the separator being wound in a winding direction to define a center of the electrode assembly and an outer circumferential surface of the electrode assembly, and an insulation member. The first electrode current collector includes a first uncoated region in which an active material layer is not coated, the first uncoated region forms a plurality of winding turns, and the first coated portion is exposed beyond the separator. The insulation member covers an exposed curved surface of the first uncoated region disposed at an outermost winding turn at the outer circumferential surface of the electrode assembly among the plurality of winding turns.

The pairing device includes a first positioning mechanism having a first pairing platform for placing the first workpiece; and a second positioning mechanism having a second pairing platform for placing the second workpiece. The first positioning mechanism and the second positioning mechanism are configured to enable at least one of the first pairing platform and the second pairing platform to move along a first direction, and enable at least one of the first pairing platform and the second pairing platform to rotate around the first direction. The first workpiece and the second workpiece are enabled to have a prescribed orientation by positioning the first pairing platform and the second pairing platform at staggered positions along the first direction, and rotating at least one of the first pairing platform and the second pairing platform around the first direction.

Disclosed is a secondary battery capable of improving sealing performance of a cell housing part including a case and a cap plate. The secondary battery includes an electrode assembly, including first and second electrode plates and a separator, a case accommodating the electrode assembly and electrically connected to the second electrode plate, a terminal mounted to the case configured to be electrically connected to the first electrode plate, a cap plate sealing an open top of the case, and a second gasket interposed between the case and the cap plate. The case includes a beading portion depressed inward and a crimping portion bent inward. A forming curvature calculated based on a bending amount of the crimping portion and a covering length of the crimping portion is different from a support strain calculated based on a depression depth of the beading portion and a cover overlapping length of the crimping portion.