2276results about "Large-sized flat cells/batteries" patented technology

Embodiments described herein relate to electrochemical cells with one or more current collectors divided into segments, and methods of producing the same. A current collector divided into segments comprises a substantially planar conductive material including a connection region and an electrode region. The electrode region includes one or more dividers defining a plurality of electron flow paths. The plurality of electron flow paths direct the flow of electrons from the electrode region to the connection region. In some embodiments, the current collector includes a fuse section disposed between the electrode region and the connection region. In some embodiments, the fuse section can include a thin strip of conductive material, such that the thin strip of conductive material melts at a melting temperature and substantially prevent electron movement between the electrode region and the connection region.

Embodiments described herein relate generally to electrochemical cells having semi-solid electrodes that are coated on only one side of a current collector. In some embodiments, an electrochemical cell includes a semi-solid positive electrode coated on only one side of a positive current collector and a semi-solid negative electrode coated on only one side of a negative current collector. A separator is disposed between the semi-solid positive electrode and the semi-solid negative electrode. At least one of the semi-solid positive electrode and the semi-solid negative electrode can have a thickness of at least about 250 μm.

Electrochemical cells and methods of making electrochemical cells are described herein. In some embodiments, an apparatus includes a multi-layer sheet for encasing an electrode material for an electrochemical cell. The multi-layer sheet including an outer layer, an intermediate layer that includes a conductive substrate, and an inner layer disposed on a portion of the conductive substrate. The intermediate layer is disposed between the outer layer and the inner layer. The inner layer defines an opening through which a conductive region of the intermediate layer is exposed such that the electrode material can be electrically connected to the conductive region. Thus, the intermediate layer can serve as a current collector for the electrochemical cell.

The invention discloses a secondary battery and electric equipment. The secondary battery comprises an electrode assembly and a plurality of tabs, the electrode assembly comprises a plurality of pole pieces and an isolating membrane, and each pole piece is connected with one tab. And the plurality of pole pieces are composed of two outer-layer pole pieces and a plurality of inner-layer pole pieces. One of the two outer-layer pole pieces is a first pole piece, and the pole lug connected with the first pole piece is a first pole lug; the plurality of inner-layer pole pieces comprise a second pole piece, the pole lug connected with the second pole piece is a second pole lug, and the polarity of the first pole piece is the same as that of the second pole piece; and the resistance value of the second tab is greater than or equal to that of any other tab connected with the inner-layer pole piece. The first tab comprises a first part and a second part, the first part is connected with the first pole piece and the second part, the resistivity of the first part is rho1, the resistivity of the second part is rho2, rho1 is smaller than rho2, the resistance value of the first tab is R1, the resistance value of the second tab is R2, and 1.01 R2 is smaller than or equal to R1. According to the secondary battery, the current density of the first pole piece can be reduced.

The invention provides a detection device and method for detecting a battery, equipment and a medium, and belongs to the technical field of batteries. The detection device comprises a first radiation source, a first detector, a second radiation source, a second detector, a bearing platform and a detection unit. The bearing platform is used for placing a to-be-detected battery, the bearing platform is movable, the moving track of the bearing platform passes through the space between the first ray source and the first detector, and the moving track of the bearing platform passes through the space between the second ray source and the second detector. The detection unit is connected with the first detector and the second detector. And the detection unit is used for performing defect detection on the to-be-detected battery based on the rays received by the first detector and the rays received by the second detector.

The invention provides a bipolar battery and an electric device. The bipolar battery comprises n stacked bipolar electrodes, wherein n is greater than 1; each bipolar electrode comprises a current collector, a positive electrode and a negative electrode; the positive electrode film layer is arranged on one side of the current collector, the side, provided with the positive electrode film layer, of the current collector is a positive electrode side, and the side, opposite to the positive electrode side, of the current collector is a negative electrode side; and a negative electrode film layer or a conductive layer is optionally arranged on the negative electrode side.

The invention discloses a battery pole piece laser die cutting and lamination integrated device and method, the device comprises a main controller and a machine table, two die cutting mechanisms are oppositely arranged on the two sides of the machine table respectively, and the two die cutting mechanisms are used for cutting a positive pole piece material belt and a negative pole piece material belt respectively to form a positive pole piece and a negative pole piece; according to the device, a plurality of working procedures such as die cutting and lamination are integrated through an integrated design, and accurate positions and stable tension of the pole pieces in the whole processing process are ensured through a tension swing roller, a process deviation rectifying assembly and a floating roller assembly; deformation or breakage caused by loosening or excessive pulling of the pole piece winding tape in the conveying process is avoided; the edge of the pole piece is guaranteed to be flat and smooth through the laser cutting assembly, the flatness and surface cleanliness of the pole piece are guaranteed through the reinforcing rib assembly and the high-speed air knife assembly respectively, the quality of the pole piece in the machining process is guaranteed to a certain degree, and the production efficiency is improved.

The present application relates to the field of batteries, and provides a lamination system. The lamination system comprises a first transfer mechanism, a second transfer mechanism, a separator unwinding mechanism, and a laminating device. The first transfer mechanism is used for transferring a first electrode sheet. The second transfer mechanism is used for transferring a second electrode sheet. The polarity of the second electrode sheet is opposite to that of the first electrode sheet. The separator unwinding mechanism is used for unwinding a separator. The laminating device is used for receiving the first electrode sheet, the separator, and the second electrode sheet, and laminating the first electrode sheet, the separator, and the second electrode sheet to form a battery cell. In the lamination system, the first transfer mechanism, the second transfer mechanism, and the separator unwinding mechanism can respectively provide the first electrode sheet, the second electrode sheet, and the separator for the laminating device, and the laminating device can laminate the first electrode sheet, the separator, and the second electrode sheet to form a battery cell, achieving automated lamination, and facilitating the improvement of the lamination quality and the production efficiency.

Apparatus, systems, and methods described herein relate to the manufacture and use of single pouch battery cells. In some embodiments, an electrochemical cell includes a first current collector coupled to a first portion of a pouch, the first current collector having a first electrode material disposed thereon, a second current collector coupled to a second portion of the pouch, the second current collector having a second electrode material disposed thereon, and a separator disposed between the first electrode material and the second electrode material. The first portion of the pouch is coupled to the second portion of the pouch to enclose the electrochemical cell.

The present invention discloses a stack cell. The stack cell of the present invention includes an electrode stack; at least one fixing tape wrapped around the electrode stack to secure the electrode stack; and a step-leveling tape attached to the edge of the upper surface of the electrode stack to eliminate the step between the fixing tape and the upper surface of the electrode stack.

The invention relates to a method of coupling a battery cell to a battery cell monitoring and control circuit, the method comprising the steps of: providing a battery cell (10) comprising a multilayer structure comprising two electrode layers (11, 12) separated by a separator layer (17) and two electrically conductive outer faces (13, 14) extending parallel to the layers of the multilayer structure; providing a microcircuit (MC) comprising two connection pads (21, 22) respectively formed on opposite faces or on the same face of the microcircuit, the microcircuit being inserted into a volume defined by two planes respectively comprising an electrically conductive outer face of the battery cell; an electrically conductive connection (25, 26) is formed between each connection pad of the microcircuit and a respective electrically conductive face of the battery cell.

The system for deicing black ice includes a plurality of laser scanners that are arranged at intervals along a road, each laser scanner including a light source unit, a non-contact temperature sensor, and a control unit that controls an operation of radiating the laser to the area in charge, a weather sensor that measures a temperature and humidity, and an integrated controller that communicates with the plurality of laser scanners. The integrated controller determines whether the laser is radiated to the road surface based on at least one of the measured temperature and humidity, and when the laser radiation is determined, generates a control signal to activate at least one laser scanner, and the control unit determines a heating area, and generates a pulse signal to turn on / off a light source unit so that the laser is radiated in accordance with a shape and range of the heating area.

Embodiments of the present application provide a battery cell, a battery, and an electric device. The battery cell comprises a casing and an electrode assembly. The casing comprises a first wall part. The first wall part is provided with N pressure relief mechanisms arranged in a first direction. The electrode assembly is accommodated in the casing. The electrode assembly comprises a main body part and a tab. The main body part comprises a plurality of sub-regions. In the first direction, at least one end of the main body part is provided with the tab, the plurality of sub-regions are continuously arranged, the length of the main body part is L, the length of each sub-region is L1, L=L1×N, L≥400 mm, and N≥2. In the thickness direction of the first wall part, the projection of each pressure relief mechanism is correspondingly located in one sub-region. Each pressure relief mechanism can discharge a discharge medium generated by thermal runaway of the corresponding sub-region, and the discharge medium generated by thermal runaway of each sub-region can be quickly discharged through the corresponding pressure relief mechanism, so that the pressure relief timeliness of the battery cell can be effectively improved, thereby improving the reliability of the battery cell.

The invention provides a battery, a battery module and electric equipment. The battery comprises a battery cell and a battery shell, the battery cell is located in a containing cavity of the battery shell and comprises a first side face and a second side face which are connected, and the area of the first side face is larger than that of the second side face; the battery shell comprises a top cover, a side shell and two first side plates; the top cover is welded with the battery cell; the side shell is welded with the top cover and comprises a bottom plate and two second side plates, the bottom plate and the top cover are spaced along the height direction of the battery, the two second side plates are spaced along the length direction of the battery, one end of each second side plate is connected with the bottom plate, the other end of each second side plate is connected with the top cover and is opposite to one second side surface; the bottom plate, one second side plate, the top cover and the other second side plate are sequentially connected to form a main shell; the two first side plates are arranged at intervals in the width direction of the battery, the two first side plates abut against the oppositely-arranged first side faces respectively, at least one first side plate is welded to the main shell, and the welding mark of the first side plate welded to the main shell is an annular welding mark.

The present disclosure relates to a system for transferring and stacking electrodes in a battery stacking system. The system includes singulation device having a buffering device that feeds singulated electrodes to in-feed conveyors that transport the singulated electrodes to a transporting device having vacuum-assisted gripping shoes. The transporting device transfers the electrodes from the in-feed conveyors to the picking device equipped with gripping shoes to pick and place the battery materials into a stack on a stacking platform.

The invention discloses an electrochemical device and electric equipment. The electrochemical device comprises a shell, an electrode assembly and a bonding piece, the shell comprises a first side wall, the electrode assembly is arranged in the shell and comprises a first side face adjacent to the first side wall, and the first side face comprises a second area, a first area and a third area which are sequentially arranged in the first direction. The bonding member is located between the case and the electrode assembly. The bonding piece comprises a first side and a second side which are opposite, the first side comprises a first bonding area bonded with the first side wall, and the second side comprises a second bonding area bonded with the second area, a third bonding area bonded with the third area and a first non-bonding area located between the second bonding area and the third bonding area. In the second direction, the projection of the first bonding area is overlapped with the first non-bonding area, and the second direction is the direction in which the first side wall is opposite to the first side face. The first non-bonding area of the bonding piece is not bonded with the first side surface, so that the risk that the electrode assembly is damaged is reduced.

A battery manufacturing apparatus includes a negative electrode notching device configured to assign a first electrode ID to individual notched electrodes; a first cutting device for separating individual negative electrodes assigned the first electrode ID; a positive electrode notching device configured to assign a second electrode ID to individual notched electrodes; a second cutting device for separating individual positive electrodes assigned the second electrode ID; a stacking device configured to stack the individual positive electrodes and the individual negative electrodes with a separator therebetween; and a roll map creating device.

An electrode sheet, a battery cell, and an electric device. The electrode sheet comprises a current collector, a first transition layer, a second transition layer, two active material layers, a first conductive member, and a second conductive member. The current collector comprises a supporting layer, a first conductive layer, and a second conductive layer. The current collector further comprises a first section and a second section. The first transition layer is located in the first section. The second transition layer is located in the first section. One of the active material layers is arranged on the first transition layer, and the other of the active material layers is arranged on the second transition layer. The first conductive member is arranged on the first conductive layer. The second conductive member is arranged on the second conductive layer. The first conductive member and the second conductive member are welded and form a plurality of welding marks, and at least one welding mark is further connected to the current collector. The current collector further comprises a first part and a second part, the projection of an edge part of each active material layer adjacent to the welding marks and the projection of the first part overlap, and the second part is provided with welding marks. The tensile strength of the first part is smaller than that of the second part. The electrode sheet can improve the safety.

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 secondary battery and a preparation method thereof, the secondary battery comprises a first pole piece, a second pole piece and an insulation support part, the first pole piece and the second pole piece are alternately laminated along a first direction to form a laminated body, the first pole piece is provided with an extension part which extends outwards compared with the second pole piece, and the insulation support part is arranged on the extension part. A gap part is formed between the adjacent extending parts in the first direction, the insulating supporting part comprises a filling part and a covering part, the filling part fills the gap part, and the covering part covers the end parts of the extending parts. The safety of the secondary battery provided by the invention is high.

An electrochemical cell comprising a non electrically-conductive structural frame for supporting components of the electrochemical cell and a tensioning element, wherein the structural frame comprises engagement means adapted to engage the tensioning element, wherein the engagement means comprises at least two bosses on the structural frame, each boss adapted to engage with a corresponding aperture on the tensioning element.

An energy storage apparatus (01), comprising a plurality of single batteries (10) and a bipolar plate (30), wherein each single battery (10) comprises a battery cell (20); the battery cell (20) comprises a first electrode (21) and a second electrode (22) which have opposite polarities and are insulated from each other; the bipolar plate (30) is provided between two adjacent single batteries (10); the first electrode (21) or the second electrode (22) of one of the adjacent single batteries (10) is connected to the bipolar plate (30) by means of contact, and the second electrode (22) or the first electrode (21) of the other of the adjacent single batteries (10) is electrically connected to the bipolar plate (30) by means of contact. Provision of the bipolar plate (30) between adjacent single batteries (10) can realize an electrical connection between the adjacent single batteries (10), thereby being conducive to reducing the weight and the size, and improving the specific characteristic of the energy storage apparatus (01).

The invention relates to a battery cell assembly and a preparation method thereof, a battery monomer, a battery and a power utilization device. The battery cell assembly comprises a first pole piece, a plurality of second pole pieces and diaphragms, the diaphragms are arranged on the two opposite sides of the first pole piece and are compounded with the first pole piece to form a composite piece, the composite piece is constructed to be continuously folded in a Z shape to form multiple layers of sub-composite pieces, and one second pole piece is arranged between any two adjacent sub-composite pieces; wherein along the length direction of the second pole piece, an isolating layer is connected between at least one side edge of each second pole piece and each sub composite piece. The isolation layer can be connected with the second pole piece and the sub-composite piece, so that the distance between the second pole piece and the sub-composite piece is shortened, the gap at the corner of the composite piece is reduced, the transmission dynamics performance of the battery is improved, and the phenomenon of lithium precipitation at the edge is reduced; besides, when lithium precipitation accumulation occurs at the edge, dendritic crystals generated by lithium precipitation can be prevented from puncturing the diaphragm due to the arrangement of the isolating layer, so that the short-circuit risk caused by lap joint of the positive electrode and the negative electrode is reduced.

The utility model discloses a tab penetrating device and assembling equipment of a battery. The battery comprises a shell and an electrode assembly, the shell is provided with a containing cavity, a through hole communicated with the containing cavity and the outside is formed in the shell, the electrode assembly is arranged in the containing cavity, and the tab penetrating device is used for guiding a tab part of the electrode assembly to extend out of the through hole. The tab penetrating device comprises a clamping mechanism and a driving mechanism, the clamping mechanism comprises a first clamping piece and a second clamping piece which are movably connected, and a clamping space with an adjustable opening and closing angle can be formed between the first clamping piece and the second clamping piece. And the driving mechanism is in transmission connection with the first clamping piece and / or the second clamping piece so as to drive the first clamping piece and / or the second clamping piece to move to adjust the size of the opening and closing angle. And the driving mechanism is configured to drive the first clamping piece and / or the second clamping piece to move, so that the first clamping piece and the second clamping piece can clamp the tab part to pass through the through hole and extend out of the accommodating cavity. Through the mode, the assembly difficulty of the battery can be effectively reduced.

The invention discloses a processing technology of a secondary battery, a battery pack and electric equipment, and relates to the technical field of batteries, the secondary battery comprises a first battery cell, a second battery cell, an adapter plate and a top cover, the processing technology comprises the following steps: respectively welding the battery cell tabs on the first battery cell and the second battery cell to the corresponding adapter plates. The first battery cell and the second battery cell are arranged at an angle, and the included angle is smaller than 180 degrees. And maintaining the first battery cell and the second battery cell in a placement state through a jig. And welding the adapter plate on a corresponding pole on the top cover. The jig is dismounted, the top cover limits the first battery cell and the second battery cell, and the state that the included angle is smaller than 180 degrees is maintained. And combining and packaging the first battery cell and the second battery cell. According to the invention, the requirement on the height of the tab can be reduced, the purpose of reducing the height of the tab is achieved, and the use amount of the tab material is effectively reduced, so that the purpose of reducing the cost is achieved.

The invention provides a secondary battery and an electronic device. The secondary battery comprises an electrode assembly, the thickness direction of the electrode assembly is a first direction, the length direction of the electrode assembly is a second direction, and the width direction of the electrode assembly is a third direction. The electrode assembly includes a plurality of pole pieces and a plurality of diaphragms. The multiple pole pieces are arranged in a stacked mode in the first direction. The multiple pole pieces comprise two outermost pole pieces located on the two sides in the first direction, secondary outer pole pieces adjacent to the outermost pole pieces, and a middle pole piece located between the two secondary outer pole pieces. The plurality of diaphragms comprise two first diaphragms positioned on two sides along the first direction and a second diaphragm positioned between the two first diaphragms, and the first diaphragms are positioned between the outermost-layer pole piece and the secondary-layer pole piece. In the second direction, the size of at least one first diaphragm is larger than that of the second diaphragm; and / or in the third direction, the size of at least one first diaphragm is larger than that of the second diaphragm. The secondary battery is favorable for improving the safety performance.

Methods of making components for solid-state electrochemical cells are disclosed. In examples, the component comprises an electrode layer and an electrolyte layer, and the method: providing a substrate; depositing an electrolyte material on a first surface of the substrate to form an electrolyte layer on the substrate, wherein a first surface of the electrolyte layer contacts the first surface of the substrate along an interface; depositing an electrode material on a second surface of the electrolyte layer to form an electrode layer on the electrolyte layer, the second surface of the electrolyte layer being opposed to the first surface of the electrolyte layer; and separating the electrolyte layer from the substrate along the interface. Also described herein are methods of methods of providing solid-state electrochemical cells, solid-state electrochemical cells, battery stacks, and electrically-powered devices.

The present application provides an electrode sheet, a battery cell, and a battery. The electrode sheet comprises a current collector and a tab. The current collector comprises a supporting layer and a conductive layer, the conductive layer being at least partially located on the surface of one side of the supporting layer. The tab comprises a main body part and a connecting part adjacent to the main body part, the connecting part being connected to the conductive layer, and the main body part extending in a direction away from the current collector. In a direction MD of the electrode sheet, the length of the connecting part of the tab is greater than the length of the main body part of the tab. By means of this configuration, the surrounding part of the tab is lengthened, causing the whole tab to be divided into the main body part and the connecting part. The main body part still maintains an original specification and size, and the original basic function of the tab is not affected, while the connecting part, which has a relatively large length, has a welding connection with the conductive layer of the current collector. In this way, the current carrying capacity of the formed welding position is improved, and charging and discharging temperature rise can be reduced, solving the problems in the existing technology of current carrying capacity of a tab welding position of a composite current collector being insufficient, and the temperature of the welding position rising easily.

The invention provides a pole piece, a laminated battery cell and electric equipment. The pole piece comprises a current collector, an active substance layer and a supporting layer, the current collector comprises a single-sided region, and the active material layer is arranged on one side of the single-sided region in the thickness direction of the current collector; the supporting layer is arranged on the side, away from the active material layer, of the single-face area so as to weaken the stress difference of the two sides of the single-face area in the thickness direction. The supporting layer is arranged on the side, deviating from the active material layer, of the single-face area of the current collector, the supporting layer can enhance the strength of the pole piece, reduce the stress difference caused by the fact that the active material layer is arranged on the single side of the current collector, and reduce the risk that the pole piece is curled, so that the quality of a battery cell with the pole piece is improved, and under the condition that the warping rate of the pole piece is the same, the reliability of the battery cell is improved. Compared with the scheme that the warping rate of the pole piece is reduced by increasing the thickness of the current collector, the battery cell manufactured by the pole piece in the scheme has higher energy density.