1031 results about "Pouch cell" patented technology

The invention belongs to the technical field of soft package battery modules, and particularly relates to a soft package power battery module intelligent processing production line and a processing production method.The processing production line comprises a battery cell processing section, a module stacking section and a module welding section; the battery cell processing section comprises a cutting and bending mechanism, a dog ear folding mechanism and a foam pasting mechanism which are sequentially arranged in the processing direction, and the module stacking section comprises a battery module stacking device and a battery module extruding and bundling device which are sequentially arranged in the processing direction; the module welding section comprises a busbar mounting station, a tab bending and rolling mechanism and a tab welding mechanism which are sequentially arranged in the machining direction. According to the invention, automation of the whole-line production process of the soft package battery module is realized.

The invention relates to a soft package lithium battery internal and external temperature real-time monitoring method, which comprises the following steps of: in a soft package battery packaging process, implanting a plurality of superfine thermocouples into a key area in a battery to obtain a temperature change condition in the battery; the key area comprises an area below the current collector, a maximum thickness position and an area close to the bottom of the shell; meanwhile, a plurality of distributed temperature measuring points are arranged on the outer surface of the battery, superfine thermocouples are arranged respectively, a distributed monitoring network is formed, and the temperature change condition outside the battery is obtained; the proportion of the total volume of the implanted superfine thermocouple to the internal space of the battery is lt; 0.03% by weight; temperature data are recorded in real time through high-precision acquisition equipment, the sampling frequency is adjustable, and the temperature error does not exceed + / -0.01 DEG C. By optimizing a sensor arrangement strategy, the original performance of the battery is maintained to the maximum extent while accurate temperature monitoring is achieved, and the method is suitable for temperature field accurate management and thermal safety control in the fields of power batteries, energy storage batteries and the like.

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.

This invention discloses a pouch battery module endplate flipping and loading device, relating to pouch battery module endplate conveying technology. It includes a loading bracket fixedly connected to a storage mechanism, with a battery endplate body to be clamped and loaded positioned below the loading bracket. It also includes a conveying mechanism positioned above the loading bracket, comprising a conveying support, and conveying grippers on both the front and rear sides of the lower end of the conveying support. The conveying support contains a dust removal mechanism, including a dust removal slide and a dust removal rotating shaft. This pouch battery module endplate flipping and loading device uses the dust removal mechanism inside the conveying bracket to assist in cleaning the clamping area of ​​the battery endplate body. After the clamping mechanism achieves positioning, the conveying mechanism drives the battery endplate body to rotate. Non-rigid contact avoids indentation damage, improving the efficiency and stability of the flipping and conveying process.

The utility model relates to the field of new energy automobiles, and discloses a soft package battery. The soft package battery comprises a shell, a battery module and a heat insulation piece, wherein the shell is provided with a pressure relief hole, the heat insulation part and the battery module are both arranged in the shell, the shell is divided into a containing cavity and a pressure relief cavity by the heat insulation part, the containing cavity is used for containing the battery module, the heat insulation part is provided with a first vent hole, and the pressure relief cavity is connected with the pressure relief hole. High-temperature gas and jet can flow into the pressure relief cavity through the first vent hole in the heat insulation piece and then are discharged out of the soft package battery through the pressure relief opening. The heat insulation piece comprises a mica heat insulation plate, so that the high temperature and impact of thermal runaway are effectively separated from the battery module, and the battery module is not influenced by thermal runaway products to explode. At least the part of the shell, which is opposite to the first vent hole, is made of a mica material, so that the impact of thermal runaway products can be effectively prevented, and the service life of the soft package battery is further prolonged.

The utility model relates to the field of batteries, and discloses a battery device and an electric device, and the battery device comprises a box body with an accommodating space; the battery pack is arranged in the accommodating space, the first side of the battery pack is adhered to the box body, the battery pack comprises a plurality of soft package battery monomers which are arranged side by side, and a gap is formed between every two adjacent soft package battery monomers; wherein at least one soft package battery monomer is provided with an edge sealing bending part on the first side, and the edge sealing bending part is bent towards any adjacent gap and at least seals the corresponding gap. According to the utility model, the edge sealing bending parts can play a role in preventing glue overflow, so that the risk that glue overflows into gaps among the soft package battery monomers is reduced, the probability that hard structures are formed among the soft package battery monomers due to the overflow glue is reduced, and the risk that the soft package battery monomers have relatively large local stress is reduced; the occurrence of lithium separation caused by damage of the shell of the soft package battery monomer is reduced, the reliability of the soft package battery monomer is improved, and the reliability of the battery device is improved.

The utility model discloses a battery pack and electric equipment. The battery pack comprises a soft package battery and a PCB (Printed Circuit Board), a plurality of soft package batteries are distributed in the width direction of the soft package batteries, each soft package battery comprises a shell and a battery cell, each shell comprises a packaging part and side edge sealing parts, the battery cells are located in the packaging parts, the side edge sealing parts are connected to the two opposite sides of the packaging parts in the width direction of the soft package batteries, and the side edge sealing parts between the adjacent packaging parts are inner side edge sealing parts. One end of the packaging part in the length direction of the soft package battery is provided with a first surface; the PCB is located on the first surface of the soft package battery, the inner side edge sealing part protrudes towards the PCB relative to the first surface, the PCB is provided with second surfaces opposite to each other in the thickness direction of the PCB, one second surface faces the first surface, the PCB is provided with a first receding groove, and the first receding groove is communicated with the first receding groove. The part of the inner side edge sealing part extends into the first clearance groove, so that the distance between the PCB and the packaging part is reduced, the length of the battery pack is reduced, and the energy density of the battery pack is improved.

The invention provides a battery packaging assembly and soft package battery in-situ detection and gas production analysis equipment, and relates to the technical field of soft package battery detection.The battery packaging assembly is characterized in that a lower cover plate and an upper cover plate are detachably connected, a sealing cavity is formed between the lower cover plate and the upper cover plate, and at least one of the lower cover plate and the upper cover plate is provided with a windowing area; the windowing area is arranged in the sealing cavity, and the flexible film for sealing the sealing cavity is arranged in the windowing area, so that the soft package battery can be conveniently installed in the sealing cavity in a sealing manner, in-situ detection can be directly performed on the soft package battery, and gas generation in a chemical process can be supported under the condition that the sealing performance is ensured. The lower cover plate and the upper cover plate are both made of polytetrafluoroethylene materials or polyimide materials, are insulated and resistant to high temperature and have extremely low absorption efficiency on X rays and neutrons, and interference on imaging is reduced. And the generated gas can be collected through the gas bag, so that the gas sampling is safer, and the subsequent mass spectrometer analysis is facilitated.

The utility model relates to the technical field of batteries, in particular to a tab structure, a battery module and a soft package battery. The tab structure comprises a tab sleeve, a first hard tab and a second hard tab, a first mounting hole and a second mounting hole are formed in the tab sleeve, the first mounting hole and the second mounting hole are correspondingly arranged at a preset interval, the first hard tab is arranged in the first mounting hole and extends outwards along the two ends of the tab sleeve, and the second hard tab is arranged in the second mounting hole and extends outwards along the two ends of the tab sleeve. The second hard tab is arranged in the second mounting hole and extends outwards along the two ends of the tab sleeve, and the extension directions of the first hard tab and the second hard tab on the tab sleeve correspond to each other. After the tab structure is connected with the positive plate and the negative plate of the battery module, the correspondence between the first hard tab and the second hard tab can be ensured, and the production qualification rate of the soft package battery is improved.

The present invention relates to the field of battery preparation. Aiming at the problem of insufficient exhaust of soft-pack batteries, a secondary formation method for reducing soft-pack gas generation is provided, including the following steps: cell encapsulation, battery liquid injection, sealing, primary formation, primary air extraction and sealing, secondary formation, and secondary air extraction and sealing. The cut-off SOC of the primary formation is 30-40%, and the cut-off SOC of the secondary formation is 90-100%. By controlling the cut-off SOC of the primary formation, increasing the secondary formation, and secondary air extraction, the exhaust of the soft-pack battery is made more thorough.

The invention discloses a working condition monitoring method for a sodium ion battery sodium precipitation behavior based on battery impedance analysis. The core principle of the method is based on the following points: when sodium precipitation occurs, sodium metal is deposited on the surface of hard carbon, so that the physical and chemical properties of the surface of the hard carbon can be changed; the conductivity of sodium metal is obviously different from that of a hard carbon material, so that the charge transfer resistance of hard carbon is obviously changed. In addition, the appearance of the sodium metal also causes the change of the electric double layer capacitance on the hard carbon surface; therefore, whether sodium metal begins to be separated out or not can be accurately judged by detecting the change of the charge transfer resistance and the electric double-layer capacitance on the hard carbon surface; according to the scheme, in-situ monitoring of sodium metal precipitation can be achieved under the condition that the battery structure is not damaged, the sodium metal precipitation situation of the sodium ion battery in the half-battery discharging process can be sensitively captured, and sodium metal deposition of the half battery, the full battery and the soft package battery under the actual operation condition can be monitored in real time.

The present disclosure relates to materials and systems to manage thermal runaway issues in energy storage systems. Exemplary embodiments include an insulation layer that is placed in the encapsulation material used to encapsulate a pouch battery cell. The encapsulation layer for a pouch battery cell is made from a laminate film that comprises an insulation layer.

The utility model discloses a soft package battery monomer, a battery device, an energy storage device and a power utilization device, the soft package battery monomer comprises a membrane shell, the wall thickness of the membrane shell is less than or equal to 0.2 mm, the membrane shell comprises two membrane parts connected in a first direction, the two membrane parts define accommodating grooves, the accommodating grooves of the two membrane parts are oppositely arranged in the first direction, and the two membrane parts are oppositely arranged in the first direction; a containing cavity of the membrane shell is jointly formed; the electrode assembly is arranged in the accommodating cavity, the size of the soft package battery monomer in the first direction is a first size, the size of any membrane part in the first direction is a second size, the first size is larger than or equal to 5mm and smaller than or equal to 70mm, and the ratio of the second size to the first size is larger than or equal to 0.4 and smaller than or equal to 0.6. According to the soft package battery monomer, the energy density of the soft package battery monomer can be well improved, so that the arrangement space of the soft package battery monomer in the battery device is increased, and the overall energy density of the battery device is well improved.

The invention discloses a soft package battery fault detection method and system based on an adaptive neural network, and the method comprises the steps: constructing a battery temperature spatial distribution model considering thermal anomaly and sensor faults, carrying out the homogenization of non-homogeneous boundary conditions through employing an auxiliary function decomposition method, and building an ODE dimension reduction system in combination with a Galerkin method; the method comprises the following steps: acquiring surface temperature, current and terminal voltage data of a battery, designing stable parameters through a linear matrix inequality, estimating a nonlinear thermal generation item by adopting a neural network observer with a self-adaptive weight matrix, and constructing an error system; a lumped residual error evaluation mechanism is introduced, a dynamic fault threshold value is generated based on a kernel density estimation technology, and online detection is completed by comparing a residual error evaluation value of an output estimation error with the threshold value in real time. According to the method, limitation of a traditional lumped parameter model is broken through, distributed thermal fault detection of the two-dimensional soft package battery can be achieved only through a small number of thermocouples, the hardware cost is greatly reduced while precision is guaranteed, and a new technical path is provided for power battery safety management.

Battery systems are provided that include polymer cells / pouch cells. The polymer cells / pouch cells are structured such that, in response to an increase in pressure within the polymer / pouch cell, e.g., a pressure increase beyond a threshold level, the polymer / pouch releases gasses in a directionally controlled manner so as to facilitate withdrawal of the gasses from the battery enclosure through a vent structure that is positioned for ease of communication with the released gasses. The battery enclosure is generally sealed, e.g., hermetically sealed, and the polymer cells / pouch cells may be spaced from each other, e.g., by a support structure that may include interleaved barrier structures.

The utility model provides a battery cell module fixing device. An innovative battery module fixing device is introduced. The heat insulation foam is added between the stacked soft package battery units and the plastic end plates, so that the problem of thermal runaway of the battery units is solved, and heat transfer between the units is effectively blocked. In addition, the battery units are pre-tensioned by adopting an external tool and are fixed by using a binding belt, so that the cycle life and the overall life of the battery are prolonged. The device further comprises a collecting plate provided with a temperature sensor and a voltage sensor, and safe and efficient operation is ensured. The power distribution box is also provided with an output copper bar, an insulating cover and an insulating sheet, improves the electrical safety and performance, and is easy to install and disassemble.

The invention relates to the technical field of batteries, and discloses a soft package battery and a battery pack, the soft package battery comprises a pole group, a first packaging film and a second packaging film; the first packaging film is provided with a containing groove used for installing the pole group, and the pole group is arranged in the containing groove; the second packaging film is arranged opposite to the first packaging film, packaging areas surrounding the periphery of the containing groove are reserved between the second packaging film and the first packaging film, and the packaging areas are fixed through hot melting plastic package so that the pole group can be packaged in the containing groove; wherein the depth of the accommodating groove is H, the thickness of the first packaging film is T1, the thickness of the second packaging film is T2, the thickness of the soft package battery is T3, and H is larger than or equal to (T3-T1-T2) / 1.1 and smaller than or equal to (T3-T1-T2) / 0.9. By limiting the relationship among the depth of the accommodating groove, the thickness of the first packaging film, the thickness of the second packaging film and the thickness of the soft package battery, the depth of the accommodating groove is maintained in a proper range, and the assembling effect of the pole group can be improved.

The invention discloses a non-linear ultrasound-based soft package battery internal tiny foreign matter imaging method, which belongs to the field of power battery manufacturing, and comprises the following steps: exciting and receiving non-linear ultrasound on the surface of a soft package battery by using a non-linear ultrasound measurement system, and extracting a non-linear ultrasound time domain signal carrying foreign matter information; performing C scanning on the soft package battery by adopting a three-degree-of-freedom motion platform, and obtaining acoustic nonlinear parameters and spatial distribution of the acoustic nonlinear parameters based on the position of a focused ultrasonic transducer, the nonlinear ultrasonic time domain signal and the frequency spectrum; performing normalization processing on the acoustic nonlinear parameters, and constructing a function relationship between the normalized acoustic nonlinear parameters and different foreign matters; and inverting the size and the position of the foreign matter based on the function relationship between the normalized acoustic nonlinear parameter and different foreign matters and the spatial distribution of the acoustic nonlinear parameter.

The invention provides a machine vision-based soft package battery tab accurate positioning and cutting method and system, and relates to the technical field of battery manufacturing, and the method comprises the steps: collecting front and side images of a soft package battery, and constructing a tab three-dimensional grid model; using a deep neural network to extract connection interface morphology features, and analyzing stress distribution; identifying a stress concentration area by adopting spectral imaging, and determining a cutting safety area; and finally planning a tool path and generating machining parameters. The optimal cutting position of the tab can be accurately identified, the cutting precision is improved, the deformation and damage risks of the tab are reduced, and the service life of the battery is prolonged.

The utility model discloses a formation device for a soft package battery, the formation device for the soft package battery comprises a rack, a pre-pressing mechanism, a pressurizing mechanism and a transmission mechanism, the pre-pressing mechanism and the pressurizing mechanism are respectively positioned at two ends of the rack; the transmission mechanism pulls the pre-pressing mechanism to move back and forth in the length direction of the rack. The transmission mechanism comprises a first pre-tightening chain and a chain adjusting piece, the chain adjusting piece is connected with the pre-pressing mechanism, and the chain adjusting piece adjusts and keeps the tension degree of the first pre-tightening chain in the moving process of the pre-pressing mechanism.

The utility model discloses an auxiliary welding tool for soft package battery tabs. The auxiliary welding tool comprises a supporting base, a tab pressing mechanism and a tab centering mechanism. A battery is placed in the supporting seat; the tab pressing mechanism comprises a pressing plate; the pressing plate is driven by a movable plate to move up and down so as to press the tab; the tab centering mechanism comprises a first clamping plate and a second clamping plate, the first clamping plate and the second clamping plate are located in the middle of the upper portion of the supporting base, and the first clamping plate and the second clamping plate are arranged in parallel and push a tab so that the tab can be attached to the battery in the middle; according to the welding auxiliary tool for the soft package battery tabs, through the arranged tab pressing mechanism, the tabs can be pressed through the pressing plate after the tabs are placed on the battery; the tab centering mechanism is arranged, so that the tab can be centered and pressed on one side of the battery; deflection and movement of the tabs in the welding process are avoided, and the welding accuracy of the tabs of the soft package battery module is improved.

Disclosure is a pouch-type cell in which a full width of a pouch cell is evenly maintained from an upper end to a lower end by completely fixing a sealing part of the pouch cell through molding using infrared heating, even without the use of tape, and a method for molding a sealing part thereof. The pouch-type cell includes an electrode assembly housing part; and sealing parts positioned at both side ends of the electrode assembly housing part, respectively, and protruding in an outward direction, in which the sealing parts include a portion overlapped by folding a tip, and the overlapped portions of the sealing parts form a constant angle in a range of is 80 to 90 degrees with a sealing part portion except the overlapped portion without the help of an external force.

The utility model discloses a soft package battery flexible edge voltage rapid testing device, which comprises a clamping mechanism, a clamping mechanism and a testing mechanism, the clamping mechanism is used for fixing soft package batteries of different specifications and dimensions, a limiting mechanism is arranged on one side of the clamping mechanism, the limiting mechanism comprises two conductive cotton layers which can slide relatively, and the two conductive cotton layers are arranged on the clamping mechanism. The testing mechanism comprises two probes and a driving part, the two probes are arranged on the driving part in a relatively sliding mode, and when the soft package battery is fixed in the clamping mechanism and the top sealing edge of the soft package battery abuts against the two conductive cotton layers, the two probes are driven by the driving part to make contact with two tabs of the top sealing edge of the soft package battery respectively. The problems that in the prior art, side voltages of soft package batteries of different specifications and sizes are inconvenient to detect, and the detection efficiency is low are solved.

An aspect of the current disclosure includes a pouch cell deformation testing apparatus and a deformation testing method using the same. The pouch cell deformation testing apparatus may include a die unit configured to allow a pouch cell to be seated thereon in an erected state, and a measurement member located above the die unit. The measurement member may be configured to measure a flatness of the pouch cell.

The utility model relates to the field of batteries, and particularly provides a battery pack and an electric vehicle, the battery pack is provided with a box body comprising a lower shell bottom plate and a beam structure, a battery core stacking body which is arranged in the box body and is formed by stacking a plurality of soft package battery cores, and a tab which extends from the end part of the soft package battery core to the beam structure along the length direction of the soft package battery core, the heat-conducting structural adhesive is arranged between the battery cell stacking body and the bottom plate of the lower shell; and the polystyrene foam is filled between the tab and the beam structure. According to the scheme, the soft-package CTP battery pack can be constructed based on the soft-package battery cells, the battery cell stack formed by stacking the soft-package battery cells is well protected, and the battery pack is easy to assemble, so that the overall stability of the battery pack is better.

The invention relates to the technical field of soft package battery processing, in particular to soft package battery assembling equipment and a method thereof.The soft package battery assembling equipment is provided with a conveying part used for conveying battery cells, and a tab processing assembly, a rubberizing assembly, a stacking assembly, a bending assembly, a tab welding assembly, an upper shell assembly and a shell welding assembly are sequentially arranged in the battery cell conveying direction of the conveying part; the tab processing assembly comprises a cutting piece arranged corresponding to the conveying piece, and the cutting piece can cut the tab; the rubberizing assembly comprises a gluing piece arranged corresponding to the conveying piece so as to paste a film on the battery cell; and the stacking assembly comprises a storage rack and a grabbing piece for conveying the battery cells into the storage rack to be stacked and transferring the battery cells to the conveying piece. The problems that in the prior art, soft package battery processing equipment is insufficient in continuity and large in occupied area, and then the soft package battery processing quality and efficiency are affected are solved.

The invention discloses a thermal management method and device for a soft package battery, and belongs to the technical field of battery thermal management, and the method comprises the steps: constructing an equivalent circuit model and a two-dimensional thermal model of the soft package battery; performing two-dimensional coupling on the equivalent circuit model and the two-dimensional thermal model to obtain a two-dimensional thermoelectric coupling model of the soft package battery; according to the two-dimensional thermoelectric coupling model, combining a Kalman filtering algorithm to predict temperature values of a plurality of areas of the soft package battery in real time; performing thermal management on the soft package battery according to the temperature value; the equivalent circuit model of the soft package battery and the two-dimensional thermal model are subjected to two-dimensional coupling to obtain the two-dimensional thermoelectric coupling model, direct thermoelectric association is realized, the thermal parameter can be directly obtained according to the electric parameter, and introduction of an additional sensor is avoided; the temperature value is predicted in real time through the Kalman filtering algorithm, accurate temperature prediction is achieved, then thermal management is conducted according to the temperature value, and accurate temperature control is achieved.

The invention discloses an ultrasonic guided wave measurement system and intelligent prediction method for the electrolyte content of a soft package battery, and the intelligent prediction method comprises the steps: measuring the soft package battery with the unknown electrolyte content through the ultrasonic guided wave measurement system, and obtaining a time domain signal; the time domain signals are input into a prediction model, the electrolyte content of the soft package battery is obtained, the prediction model is obtained through training of a training set, the training set is a typical feature set-electrolyte content data set, and the prediction model is constructed through a machine learning model or a deep learning model. By means of the trained machine learning model or deep learning model, accurate prediction of the electrolyte content is achieved for the soft package battery with the unknown electrolyte content.

High-voltage storage device (1) for a motor vehicle, comprising a plurality of electrically interconnected energy storage cells (2) designed as pouch cells, which are arranged in a storage housing (6) of the high-voltage storage device (1), wherein at least one cell group (3) comprising at least two energy storage cells (2) is provided, which are arranged one behind the other in the longitudinal direction (4) of the energy storage cells (2), wherein the electrical contact sections (5) of the energy storage cells (2) are aligned in the longitudinal direction (4) and are electrically interconnected.