6704results about "Wound/folded electrode electrodes" patented technology

A lithium battery includes: a housing in which an accommodation space is formed; a core disposed in the accommodation space; a negative cover disposed at a first end of the housing; a positive cover disposed at a second end of the housing; a positive current collecting disk disposed on a side of the positive cover close to the core; and a support member disposed between the positive cover and the positive current collecting disk and abutting against the positive current collecting disk.

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 battery cell, a battery, and an electrical device are described. The battery cell includes an electrode assembly. The electrode assembly is wound along a winding direction to form a jelly-roll structure containing a roll core cavity in a central region. The battery cell further includes a gel-state central column packed in the roll core cavity and formed by coagulation. The central roll core cavity formed by winding the electrode assembly is packed with the gel material that coagulates to form a gel-state central column. In this way, the central column can support the electrode assembly after coagulating in shape, thereby improving the deformation resistance of the electrode assembly, and reducing the risk of central collapse of the electrode assembly. In addition, when the electrode assembly is squeezed, the central column can serve as an elastic cushion to some extent.

A current collecting plate for a negative electrode of a battery unit. The current collecting plate comprises: a main body part that forms a main body of the current collecting plate; a welding region that is arranged at the approximate center of the main body part; and a connecting part that connects the welding region to the main body part, wherein in addition to being connected to the connecting part, the welding region is separated from the main body part by a through opening.

A battery includes an electrode assembly having a first uncoated portion and a second uncoated portion; a housing having an open portion formed at one side and configured to accommodate the electrode assembly through the open portion; a first current collector coupled with the first uncoated portion and located inside the housing; a cap configured to cover the open portion; and a spacer. The spacer includes a spacer portion interposed between the first current collector and the cap and configured to prevent movement of the electrode assembly, a gasket portion interposed between the housing and the cap and configured to seal the gap between the cap and the housing, and a connection portion configured to connect the spacer portion and the gasket portion and having a bending portion configured to switch an extension direction thereof between the spacer portion and the gasket portion.

The invention relates to an intelligent winding control method of a lithium battery automatic cutting and winding machine in the field of winding machines, which aims at the inertia effect of a material in a high-speed winding process, establishes a material dynamic model, comprehensively considers the quality, rigidity and damping parameters of the material, predicts the dynamic response characteristics of the material in the winding process, and controls the winding speed of the material. A feed-forward compensation mechanism is introduced into a control system, and control instruction correction is performed on an execution mechanism according to a prediction result of a material dynamic model, so that the influence of a material inertia effect on position control precision is inhibited; in a man-machine interaction interface of the winding machine, information display and operation guide functions are provided, key parameters and equipment state information in the winding process are displayed in real time, monitoring and management by operators are facilitated, a perfect data recording and tracing system is established, production process data of each roll of battery cells are completely recorded and stored, and the production efficiency of the battery cells is improved. A traceable quality management chain is formed, and data support is provided for product quality analysis and improvement.

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 cylindrical battery includes an electrode assembly in which a first electrode, a second electrode, and a separator interposed therebetween are wound based on a winding axis to define a core and an outer circumference; a battery housing having an open end and a closed portion opposing thereto; the battery housing being electrically connected to one of the first electrode and the second electrode; a sealing body configured to seal the open end of the battery housing; a terminal electrically connected to another of the first electrode and the second electrode; and a pressure sensor interposed between an outer circumference of the electrode assembly and an inner circumference of the battery housing and configured to sense a swelling pressure applied by the outer circumference of the electrode assembly to the inner circumference of the battery housing.

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.

Provided are a winding shaft, a cell manufacturing apparatus, and a cell manufacturing method. The winding shaft is used for winding plates and includes: a winding shaft body including a first winding surface; an adjustment member configured to be mounted to the winding shaft body and movable simultaneously in an axial direction of the winding shaft and in a radial direction of the winding shaft, where the adjustment member includes a second winding surface, and the first winding surface and the second winding surface are configured to wind the plates jointly; and an actuator configured to drive the adjustment member to move to change a relative position of the second winding surface with respect to the first winding surface, so as to change a winding circumference of the winding shaft. The winding shaft of the present application can reduce the possibility of or the amount of misalignment between the tabs.

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.

The invention provides an electrode assembly manufacturing device and method, the electrode assembly manufacturing device comprises a winding needle and a heating part, the winding needle is used for winding a pole piece and a separator and forming a winding structure, and the heating part is used for being inserted into the winding center of the winding structure and heating the winding structure. According to the manufacturing equipment, the heating component can heat the winding structure at the winding center of the winding structure, so that at least part of ion channels in the separator of the inner ring in the winding structure are fused and closed, shuttling of ions is blocked, lithium precipitation of the winding structure can be reduced, and the risk of lithium precipitation of the battery can be effectively reduced.

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.

The invention discloses a battery monomer, a preparation method of the battery monomer, a battery and a power utilization device of the battery monomer, and the battery monomer comprises a shell which comprises a first wall; the pole is arranged on the first wall, a connecting hole penetrating through the pole is formed in the pole, at least part of the inner peripheral wall of the connecting hole forms a first inclined plane, and the first inclined plane is obliquely arranged relative to the axis of the connecting hole; the electrode assembly comprises an active substance coating part and a tab, the active substance coating part is arranged in the shell, the tab is electrically connected with the active substance coating part, and at least part of the tab extends into the connecting hole and is connected with the first inclined surface. According to the battery monomer disclosed by the invention, the connecting hole penetrating through the pole column is formed in the pole column, at least part of the inner wall of the connecting hole forms the first inclined surface, and at least part of the tab extends into the connecting hole and is fixedly connected with the first inclined surface, so that the tab occupies less space in the battery monomer, and the weight of the tab and the pole column is reduced; therefore, the energy density of the single battery can be well improved.

An energy storage device includes: an electrode assembly that is formed by stacking a plurality of plates and is elongated in a first direction; a container that accommodates the electrode assembly and is elongated in the first direction; and a first terminal that is electrically connected to the electrode assembly. The container includes a side surface portion at an end portion of the container in the first direction. The side surface portion includes: a first terminal mounting portion on which the first terminal is mounted; and a first recessed portion that is formed at a position different from a position where the first terminal mounting portion is disposed.

To provide a secondary battery with high energy density and high reliability, and a method for manufacturing the secondary battery stably and efficiently.SOLUTION: A method for manufacturing a secondary battery sequentially includes the steps of: preparing an electrode body, the electrode body including a first electrode, a second electrode with a different polarity from that of the first electrode, a first electrode tab group connected to the first electrode in a first end part, and a second electrode tab group connected to the second electrode in a second end part, the first end part and the second end part being located on opposite sides; electrically connecting a first electrode terminal provided in a first sealing plate and the first electrode tab group to each other; joining the second electrode tab group to a first conductive member; inserting the electrode body into a case body from the second end part side through a first opening after joining the second electrode tab group to the first conductive member; electrically connecting the second electrode terminal provided in the second sealing plate and the second electrode tab group to each other; and sealing the opening by the sealing plate after electrically connecting the electrode terminals and the electrode tab groups together.SELECTED DRAWING: Figure 21

A rechargeable battery includes: a case receiving an electrode assembly and including an opening; a cap assembly including a cap plate coupled to the case to cover the opening, and a terminal plate thermally fused to the cap plate by a thermal-fusion member, the thermal-fusion member electrically insulating the cap plate and the terminal plate from each other; and a sealing part attached to and located on a side of the thermal-fusion member, a side surface of the terminal plate, and an outer surface of the cap plate.

The invention provides an electrode assembly, a battery and electric equipment, and relates to the technical field of batteries. The electrode assembly includes a wound body. The winding body comprises a wound pole piece, and the pole piece comprises a pole piece body, a tab area and a transition area. The pole piece body is coated with an active substance, and the pole piece body is connected with the tab region through the transition region. And the tab region comprises a plurality of tabs which are arranged at intervals along the winding circumferential direction. The tab area comprises a first section and a second section, one end of the first section is connected with one end, far away from the pole piece body, of the transition area, the second section is connected with one end, far away from the transition area, of the first section, the first section is bent towards the direction far away from the winding center along the leveling direction of the tab area towards the pole piece body, and the second section is bent towards the direction of the winding center. In the leveling process of the tabs, the first section and the second section can be regularly leveled to the pole piece body according to the bending direction, so that the problem that metal chips are generated due to rubbing is effectively avoided, and the distribution rule of the tabs is improved.

A rectangular secondary battery is provided with: a rectangular exterior body having an opening, a bottom part, a first lateral wall, a second lateral wall, a third lateral wall, and a fourth lateral wall; a sealing plate for sealing the opening; and a flat wound electrode body obtained by winding a positive electrode plate and a negative electrode plate with a separator therebetween, wherein a plurality of the flat wound electrode bodies are arranged in the rectangular exterior body. The flat wound electrode bodies each have: a flat region formed at the center, a first bent region having a bent outer surface and being formed on one end side of the flat region; and a second bent region having a bent outer surface and being formed on the other end side of the flat region.

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.

The invention discloses a shell entering device and an assembling method of a battery and a battery assembling system. The shell entering device comprises a rack, a bearing mechanism and a shell assembling mechanism, the bearing mechanism is arranged on the rack and is used for bearing the bottom cover and the electrode assembly supported above the bottom cover; the shell loading mechanism is arranged on the rack and comprises a shell fixing mechanism and a tab part guiding mechanism, the shell fixing mechanism is used for fixing a shell, and the tab part guiding mechanism and the shell fixing mechanism can be close to or far away from the bearing mechanism; the shell fixing mechanism is configured to enable the shell to be arranged on the outer side of the electrode assembly in a sleeving mode through the opening end when the shell fixing mechanism moves close to the bearing mechanism. And the tab part guide mechanism is configured to guide the tab part to penetrate out of the accommodating cavity from the through hole when the shell sleeves the electrode assembly. Through the mode, the tab part smoothly extends out of the shell, so that the electrode assembly can be accurately put into the shell, the preparation difficulty of the battery is reduced, and the assembly efficiency and the yield of the battery are improved.

The invention belongs to the technical field of battery manufacturing, and particularly relates to a pole piece compounding device, naked battery cell winding equipment and a naked battery cell winding method. The pole piece compounding device comprises a first compounding roller assembly, a second compounding roller assembly and a third compounding roller assembly, the first compounding roller assembly comprises a first compounding roller and a second compounding roller, the first compounding roller and the second compounding roller are arranged oppositely, and the first compounding roller and the second compounding roller are used for sequentially compounding a first diaphragm, a first pole piece and a second diaphragm together in a stacked mode; and the side edge diaphragm composite assembly is used for compounding the part, exceeding the side edge of the first pole piece, of the first diaphragm with the part, exceeding the side edge of the first pole piece, of the second diaphragm. The technical scheme provided by the embodiment of the invention aims to solve the problem that the first diaphragm, the first pole piece, the second diaphragm and the second pole piece are easy to fold in the winding process of preparing the naked battery cell, so that the first pole piece and the second pole piece are overlapped.

A battery includes a jelly roll and a case. The case includes a first shell and a second shell; the first shell has an accommodation cavity therein, the first shell is provided with an opening communicated with the accommodation cavity, the jelly roll is disposed in the accommodation cavity, and the second shell blocks the opening. An explosion-proof score is provided in the first shell and / or the second shell. A burst pressure of the explosion-proof score is P, a tensile strength of a material of the case is σb, a diameter of the first shell (2) is D, a wall thickness of the case is H, and a depth of the explosion-proof score (211) is h. In a case where the explosion-proof score is linear,P=(H-h)⁢ σbD-0.6⁢(H-h);or in a case where the explosion-proof score is curved,P=2⁢(H-h)⁢ σbD-1.2⁢(H-h).

Disclosed is a cylindrical battery, which includes an electrode assembly; a battery housing accommodating the electrode assembly; a first current collecting plate coupled to the first uncoated portion and located within the battery housing; a cap plate covering the open portion; a sealing spacer configured to prevent the electrode assembly from moving and to enhance the sealing force of the battery housing; an electrode terminal electrically connected to the second uncoated portion; and an insulating gasket interposed between the electrode terminal and the perforated hole, and the electrode terminal includes a body portion; an outer flange portion extending along an outer surface of the closed portion from a circumference of one side of the body portion; an inner flange portion configured to extend from a circumference of the other side of the body portion; and a flat portion provided on an inner side of the inner flange portion.

The invention provides an electrode assembly, a battery monomer, a battery and electric equipment. The electrode assembly comprises a positive pole piece and a negative pole piece which are arranged in a stacked mode. The positive pole piece comprises a positive current collector and a positive active material layer, the positive current collector comprises a positive coating area and a positive pole lug, the positive active material layer is at least partially coated on the positive coating area, the positive pole lug is connected to the end part of the positive coating area along a first direction, and the first direction is perpendicular to the overlapping direction of the positive pole piece and the negative pole piece. The positive pole piece comprises a positive active material layer, the negative pole piece comprises a negative active material layer, the positive active material layer and the negative active material layer are oppositely arranged, and in the first direction, the two ends of the negative active material layer both exceed the positive active material layer. The positive electrode active material layer comprises a positive electrode main body part and a positive electrode edge part, the positive electrode edge part is arranged on one side, deviating from the positive electrode tab in the first direction, of the positive electrode main body part, and the positive electrode edge part is configured as follows: the unit area capacity of the positive electrode edge part is smaller than that of the positive electrode main body part.

The present invention relates to the technical field of batteries, and discloses a battery, which comprises: a shell, which comprises a pole assembly; the cylindrical roll core comprises a roll core body and a plurality of tabs led out from the roll core body; the tab is used for being electrically connected with a pole assembly or a shell; the plurality of tabs are distributed in multiple layers in the radial direction of the roll core body; the width E of a single tab is greater than or equal to 2mm and less than or equal to 9mm; the difference value between the maximum thickness and the minimum thickness of the roll core body is d, the number of winding layers of the roll core body is n, and d * n is larger than or equal to 0.08 and smaller than or equal to 0.9. According to the battery provided by the invention, by comprehensively controlling the relationship between the difference value d of the maximum thickness and the minimum thickness of the roll core body and the number n of winding layers of the battery core, the tab alignment degree in the radial direction of the battery core can be ensured as much as possible, the tab dislocation condition is effectively reduced, the gap between the front layer and the rear layer after winding is relatively uniform, and the effective welding area is ensured; and the overcurrent capability is ensured.

The invention discloses a battery cell and a terminal device. The battery cell comprises an electrode assembly, and the electrode assembly comprises a first pole piece, a diaphragm and a second pole piece which are wound. The electrode assembly comprises a first straight section, a first bent section, a second straight section and a second bent section which are sequentially connected, the first straight section and the second straight section are oppositely arranged in the first direction, and the first bent section and the second bent section are oppositely arranged in the second direction. The first pole piece comprises a first current collector and a first active material layer, and the first active material layer is arranged on one side of the first current collector in the thickness direction of the first current collector. A plurality of first grooves are formed in the surface, deviating from the first current collector, of the first active material layer; observed in the second direction, the first reference line penetrates through the first bending sections in the third direction, first intersection points exist between the multiple first grooves of at least one layer of first bending sections and the first reference line, the number of the first intersection points is N1, and N1 / W1 is larger than or equal to 60 and smaller than or equal to 1000. The battery cell is beneficial to reducing the risk of lithium precipitation.

The invention relates to the technical field of batteries, and provides a pole piece, a battery cell, a battery pack and a pole piece design method. The pole piece comprises a main body part and a pole lug, the main body portion is configured to be wound to form a winding core. The main body portion has a winding start end and a winding stop end. The direction from the winding starting end to the winding ending end is the winding direction. And the at least two tabs are arranged on one side of the main body part at intervals along the winding direction. And in the winding direction, the heights of the tabs at the odd number positions and the heights of the tabs at the even number positions have opposite gradual change tendencies. Therefore, the integrity of the welding marks can be ensured, and the phenomena of tab tearing and the like caused by interference can be avoided.