3941results about "Vent arrangements" patented technology

A battery pack according to one or more embodiments of the present disclosure includes a plurality of battery cells; and a housing including a bottom member, a plurality of side walls, and a top member, the bottom member, the plurality of side walls, and the top member form an interior accommodation space configured to accommodate the plurality of battery cells, wherein at least one among the plurality side walls, the top member, and the bottom member are formed by a plurality of metal sheets that are roll bonded to each other, wherein at least one cooling channel is formed between bonding areas of the plurality of metal sheets, and wherein at least one crash channel is formed between bonding areas of the plurality of the metal sheets.

A battery pack including a housing and a cell frame supported within the housing. The cell frame includes a plurality of openings to secure a plurality of battery cells, and a weld strap disposed within the cell frame configured to interconnect the plurality of battery cells. The battery pack also includes a cell header cover disposed adjacent to the battery cells and covering the weld strap. The cell header cover is configured to prevent battery cell particulate from circulating within the outer housing. The cell header cover and the cell frame cooperate to surround the battery cells.

Provided in the present application are an energy storage device and an energy storage system. The energy storage device comprises a first compartment and a battery device, wherein the first compartment comprises a first top wall and a first side wall connected to each other; the first top wall is provided with an exhaust mechanism, which can communicate the interior of the first compartment with the outside; and the first compartment accommodates the battery device. Since the first side wall mainly plays a role in supporting and load bearing in the first compartment, and the exhaust mechanism, which communicates the interior of the first compartment with the outside, is arranged on the first top wall instead of the first side wall, the impact of the arrangement of the exhaust mechanism on the structure of the first side wall is reduced, thereby reducing the impact of the arrangement of the exhaust mechanism on the supporting effect and load-bearing capacity of the wall of the first compartment, facilitating an improvement in the stress condition of the energy storage device and facilitating an improvement in the reliability of the energy storage device.

The invention relates to the technical field of batteries, and discloses a battery cell cover plate assembly, a battery cell and a battery pack. The battery cell cover plate assembly comprises a cover plate body and an anti-explosion valve. The cover plate body is provided with a pressure relief hole, and the pressure relief hole comprises a first hole section, a second hole section and a third hole section; the side wall of the first hole section protrudes out of the first surface to form a boss, the pressure relief hole further comprises a fourth hole section penetrating through the second surface, the fourth hole section is communicated with the third hole section, in the X direction, the inner diameter of the fourth hole section is smaller than the outer diameter of the side wall of the outer ring of the boss, and the cover plate body and the boss form a bent reinforcing structure. In the Z direction, the distance from the bottom wall of the fourth hole section to the first surface is a, in the X direction, the single-side distance from the side wall of the fourth hole section to the side wall of the outer ring of the boss is b, and a and b meet preset conditions. According to the invention, the problem of explosion-proof valve tearing caused by weak deformation resistance of the thin-wall cover plate can be solved, the risk of explosion-proof valve failure is reduced, liquid leakage of the battery cell is avoided, and the safety of the battery cell is improved.

A battery pack according to an embodiment of the present disclosure includes: a plurality of battery modules; a tray including a mount plate on which the plurality of battery modules are seated, a front frame provided on an end portion in a longitudinal direction of the mount plate, and a rear frame provided on the other end portion in the longitudinal direction of the mount plate; a pair of side covers covering both end portions in a width direction of the tray; at least one module partition wall parallel to the front frame and the rear frame, and located between adjacent battery modules; and a battery energy management system (BEM) assembly including a BEM bracket having one end portion fastened to the at least one module partition wall and the other end portion fastened to the rear frame, and a BEM mounted on the BEM bracket.

The invention relates to the technical field of lithium ion battery safety, and discloses a lithium ion battery thermal runaway multi-cascade emergency response prevention system. The system comprises a thermal signal monitoring module, a thermal diffusion prediction module, an emergency suppression module, a pressure balance module and a multi-mode linkage module. The thermal signal monitoring module obtains multi-dimensional temperature data, identifies abnormity and generates a thermal runaway early warning signal; the thermal diffusion prediction module combines the early warning signal and the battery module structure parameters to calculate the thermal propagation path and rate and generate a prediction result; the emergency suppression module matches a suppression medium according to a prediction result, and calculates a dose putting strategy to form a suppression scheme; the pressure balance module obtains pressure data, analyzes the change rate and distribution, adjusts a pressure release valve strategy in combination with a suppression scheme, and generates a pressure regulation and control instruction; and the multi-mode linkage module integrates data and a scheme, and generates a system-level emergency response instruction based on a pressure regulation and control instruction to realize thermal runaway multi-level joint prevention.

The invention provides a detection device for internal pressure change of a battery cell, the battery cell comprises an explosion-proof valve or an explosion-proof sheet, and the explosion-proof valve or the explosion-proof sheet is arranged on a shell of the battery cell. When the internal pressure of the battery cell changes, the explosion-proof valve or the explosion-proof sheet deforms at first until the battery cell is broken due to overlarge internal pressure, and the detection device comprises an electrode sheet which is a multi-section type electrode sheet comprising a plurality of electrode sections, each electrode section is physically separated and is arranged above or on the side of the explosion-proof valve or the explosion-proof sheet, each electrode section and the explosion-proof valve or the explosion-proof sheet form an inductive capacitor, and deformation of different positions of the explosion-proof valve or the explosion-proof sheet is detected based on capacitance change; and the chip is a multi-channel chip, each channel is connected with each electrode section through a connecting line in a one-to-one correspondence manner, and the chip is also connected to an anti-explosion valve or an anti-explosion sheet through a connecting line. The invention also provides a battery core internal pressure early warning system.

The utility model belongs to the technical field of batteries, and discloses a cover plate structure and a battery, the cover plate structure comprises a top cover plate and a support plate, the top cover plate is provided with an anti-explosion valve and a protruding part, and the protruding part and the anti-explosion valve are arranged at an interval; the supporting plate is connected with the protruding part so that an exhaust channel can be formed between the supporting plate and the top cover plate, a first exhaust hole and a second exhaust hole are formed in the supporting plate, and the first exhaust hole and the second exhaust hole are both communicated with the exhaust channel; the projection of the second exhaust hole in the first direction at least partially coincides with the projection of the anti-explosion valve in the first direction. Thus, the supporting plate is arranged on the protruding part, so that an exhaust channel is formed between the supporting plate and the top cover plate, high-temperature and high-pressure gas can enter the exhaust channel through the first exhaust hole and the second exhaust hole when the battery is in thermal runaway, and the exhaust effect of the anti-explosion valve is improved; the supporting plate can limit the end part of the pole group, so that the pole group is prevented from moving and shielding the anti-explosion valve, and the safety performance of the battery is improved.

A motor vehicle traction battery arrangement includes two cooling plates respectively disposed in a horizontal plane and a high-voltage battery module. The lower and upper horizontal walls of which are cooled directly by the cooling plates and which encases a plurality of identical rectangular battery cells in a rigid battery module housing. The battery cells are all configured such that they are plate-like and elongated, are parallel to one another in vertical planes (y,z) and each includes two small-area vertical end walls, two large-area vertical side walls and two medium-area horizontal walls. On its end face, each battery cell includes an anodic connecting element and a cathodic connecting element. At least two similar cell stacks including a same plurality of battery cells are provided, and are stacked such that their battery cell side walls adjoin one another. The battery cell horizontal walls directly adjoin a cooled battery module horizontal wall.

The invention relates to the technical field of batteries, and particularly discloses an anti-explosion valve mounting structure and a battery, and the anti-explosion valve mounting structure comprises an anti-explosion valve and a mounting plate. A mounting hole is formed in the mounting plate, the anti-explosion valve comprises a body part, a fixing part and a skirt edge, and the skirt edge is arranged in the circumferential direction of the fixing part in a surrounding mode. A seam is formed between the peripheral wall of the side, away from the body part, of the fixing part and the hole wall of the mounting hole in the direction from the fixing part to the skirt edge. In the axial direction of the mounting hole, the skirt edge is in lap joint with the end face of the mounting plate in the circumferential direction of the mounting hole, the projection of the skirt edge on the mounting plate can cover the seam, and the fixing part and / or the skirt edge are / is welded to the mounting plate. The thickness of the welding position of the anti-explosion valve and the mounting plate is increased through the arrangement of the skirt edge, the welding yield of the mounting plate and the anti-explosion valve is high, and the connection strength is high. And meanwhile, the skirt edge also provides support for the connecting position of the mounting plate and the anti-explosion valve, so that the structural strength is relatively high. The invention also provides a battery which is assembled by adopting the explosion-proof valve mounting structure.

The invention discloses a battery and electric equipment, and belongs to the technical field of batteries. The battery includes a first battery module including a plurality of battery cells stacked in a second direction, and an isolation member. The isolation part is located on one side of the first battery module in the first direction. A pressure relief mechanism is arranged on one side, facing the isolation part, of each battery monomer in the first battery module, a collection cavity is formed in the isolation part, and the collection cavity is used for collecting emissions of the battery monomers when the pressure relief mechanism is actuated. And in the second direction, the pressure relief mechanisms of the two adjacent battery monomers in the first battery module are staggered from each other, and the second direction is intersected with the first direction. The battery has relatively high reliability.

The invention discloses a battery box and a battery pack for battery cell thermal runaway optimization management, and relates to the field of battery pack thermal runaway optimization, the battery box for battery cell thermal runaway optimization management comprises an outer box body; the battery cell placing space is formed in a cavity of the outer box body, the smoke exhaust channel is communicated with the battery cell placing space, an explosion-proof assembly is arranged on the outer box body, and the explosion-proof assembly comprises a first explosion-proof valve communicated with the smoke exhaust channel and a second explosion-proof valve which is communicated with the cavity of the outer box body and is different from the first explosion-proof valve in opening pressure; when the battery cell aluminum shell is damaged, high-temperature flue gas can be guided to be discharged in order, the influence of the high-temperature flue gas on a high-pressure part is reduced, and a safe pressure relief path is ensured, so that the safety redundancy and reliability of a battery system are greatly improved.

The invention relates to the technical field of batteries, and provides an insulating film, a battery cell and a battery pack, the insulating film comprises a first film group and a second film group; the first film group comprises a first film body, a second film body and a third film body which are connected in sequence, and the second film body is provided with an avoiding hole through which a tab penetrates and a containing table protruding towards one side; two sides of the first membrane group are respectively connected with a second membrane group, and each second membrane group comprises a first folding body, a second folding body and a third folding body; one end of the first film body or the third film body is provided with a first adhesive layer, the second folding body is provided with a second adhesive layer, the first folding body or the third folding body is provided with a third adhesive layer, and the first film body and the third film body can be folded relative to the second film body and connected through the first adhesive layer. And the first folding body, the second folding body and the third folding body of each second film group can be folded relative to the first film group and are connected through the second adhesive layer and the third adhesive layer to form a box body structure. According to the invention, the fixing effect of the pole group in the battery cell is improved.

The invention provides a lithium ion battery safety valve opening and failure early warning method based on expansive force, and belongs to the technical field of lithium ion batteries. Battery expansive force and cycle data under different pre-tightening force conditions are collected, statistical features are extracted to construct a state feature set, health state groups are divided by adopting a fuzzy clustering algorithm, and the early warning result is obtained. Establishing a segmented nonlinear mapping model of the expansive force and the internal pressure, performing wavelet denoising and robust differential calculation on expansive force signals, and optimizing an initial expansive force derivative threshold value by analyzing time dispersion at different heating rates; a multi-scale feature fusion algorithm based on hierarchical attention aggregation is utilized to construct a state self-adaptive early warning model to correct a threshold value, and a four-stage early warning mechanism is set to monitor the opening and failure states of the safety valve. The technical problem that the opening time of the safety valve cannot be accurately predicted and self-adaptive early warning cannot be realized under different battery health states and pretightening force working conditions is solved.

Systems and methods are provided for testing and / or validating anti-propagation systems designed to mitigate a thermal runaway condition in lithium-ion batteries. A system comprises a first temperature sensor for detecting a temperature of a trigger battery cell within the battery module and a heater removably couplable to a substantially central portion of the trigger cell and configured to heat the trigger cell to a threshold temperature. The system further comprises a second temperature sensor for detecting a temperature of a test battery cell adjacent to the trigger cell within the battery module. The trigger cell undergoes a thermal runaway condition upon reaching the threshold temperature. The system may further comprise a controller for controlling the rate of heating of the trigger cell. The system ensures that the trigger cell will breach via the pressure release valve or cell vent after reaching the threshold temperature.

A battery cell, a battery, and an electric device. The battery cell includes a casing, a first pressure relief mechanism, and a second pressure relief mechanism. The casing is configured to accommodate an electrode assembly. The first pressure relief mechanism and the second pressure relief mechanism are disposed on the casing at an interval, and the first pressure relief mechanism is started earlier than the second pressure relief mechanism.

A battery pack according to the present disclosure may include: a plurality of battery modules; and a pack case having an accommodation space formed to accommodate the plurality of battery modules, wherein the pack case may be configured such that at least one surface of the pack case is deformed when internal pressure increases due to venting gas and flame generated due to a thermal event in the battery module.

A prismatic battery cell has a shell with an upper wall, from which at least one electrical connector protrudes, a lower wall and a perimetral wall; the battery cell further has a safety valve carried by the shell and configured to vent, outwardly, gases possibly generated within the shell; the safety valve is arranged in proximity to the lower wall of the shell so as to vent the gases into a cavity defined by a lower area of a battery pack where the battery cell is installed.

The utility model provides a battery box body, a battery and a power utilization device. And a heat dissipation system is arranged in the battery box body. The heat dissipation system comprises a pressure relief device and a fire extinguishing device. The pressure relief device comprises an exhaust channel and a pressure relief valve, an air inlet of the exhaust channel is formed in the battery box body, and an air outlet of the exhaust channel is communicated with the pressure relief valve. The exhaust channel is used for conveying high-temperature gas to the pressure release valve. And the pressure release valve is used for discharging high-temperature gas in the battery box body. The fire extinguishing device is provided with a containing cavity, and a fire extinguishing medium is stored in the containing cavity. The containing cavity communicates with the exhaust channel, so that the fire extinguishing medium can enter the exhaust channel. According to the pressure relief device, the battery with thermal runaway can be timely cooled and exhausted, so that the safety of the power utilization device is ensured. And a fire extinguishing medium in the fire extinguishing device enters the exhaust channel and extinguishes flames in the exhaust channel, so that the flames are prevented from being exhausted out of the battery box body to cause heat diffusion, the risk of battery damage is reduced, and the safety of the electric device is further ensured.

The invention relates to the technical field of lithium batteries, and provides a battery cell cover plate structure and a battery cell, the battery cell cover plate structure comprises a cover plate body, a through explosion-proof hole is formed in the cover plate body, and an explosion-proof valve is fixedly connected to the end part of one end in the axial extension direction of the explosion-proof hole; wherein an annular boss is integrally formed on the cover plate body around the periphery of the anti-explosion valve, a transition area is formed on the cover plate body between the annular boss and the outer edge of the anti-explosion valve, and an annular liquid accumulation groove is formed in the transition area through stamping; the thickness of the cover plate body is H, the height of the annular boss is H1 in the thickness direction of the cover plate body, and H1 / H is larger than or equal to 0.1 and smaller than or equal to 0.8. According to the invention, the electrolyte is blocked through the cooperation of the annular boss and the liquid accumulation groove, so that the electrolyte is prevented from flowing into the explosion-proof valve to cause the failure of the explosion-proof valve, and the safety performance of the battery cell is improved. Furthermore, the thickness size of the annular boss and the cover plate body is limited, so that the cover plate can be easily machined and formed, and the electrolyte is effectively blocked.

The present disclosure relates to a battery tray and a power battery pack. The battery tray includes a tray body. The tray body includes a base plate and a side beam, and the side beam is disposed around the base plate and defines, together with the base plate, an accommodating space for battery cells. The base plate is formed therein with an air passage, and the base plate is provided with several inlet vents and at least one exhaust vent. The inlet vent is configured to introduce a flame, smoke or gas discharged from the battery cell into the air passage, and the exhaust vent is configured to discharge the flame, smoke or gas inside the air passage.

The utility model provides a cover plate, a battery and electric equipment. The cover plate comprises a cover plate body, an anti-explosion structure and a copper layer, the anti-explosion structure is arranged on the cover plate body, the copper layer is arranged on at least one side of the cover plate body and covers the anti-explosion structure, and the cover plate body and the copper layer are made of different materials. According to the cover plate, the cover plate body is provided with the copper layer, the copper layer can prevent the cover plate body from being corroded, and the anti-corrosion performance of the cover plate body is improved. The anti-explosion structure is covered with the copper layer, the anti-corrosion performance of the anti-explosion structure can be improved, the situation that the opening force is inconsistent due to the fact that the anti-explosion structure is corroded is avoided, and the consistency of the opening force of the anti-explosion structure is guaranteed. And meanwhile, the heat conductivity of the copper is higher, so that the heat dissipation of the battery is facilitated.

The utility model discloses a battery box body, a battery pack and a new energy automobile. Belongs to the technical field of vehicles and comprises a beam body, the beam body defines an exhaust channel, a first exhaust hole and a second exhaust hole are formed in the two sides of the beam body in the width direction of the beam body respectively, and the first exhaust hole and the second exhaust hole are staggered in the height direction of the beam body. The exhaust valve of the battery cell on one side of the beam body is communicated with the exhaust channel through the first exhaust hole, the exhaust valve of the battery cell on the other side of the beam body is communicated with the exhaust channel through the second exhaust hole, and when thermal runaway happens to the battery cell on one side of the beam body, high-temperature and high-pressure gas generated by the battery cell can be exhausted into the exhaust channel. The staggered first exhaust holes and the second exhaust holes can prevent gas exhausted into the exhaust channels from being directly exhausted to the battery cells on the other side of the beam body, the risk that the battery cells on the other side of the beam body are heated can be reduced, and therefore the safety risk can be reduced.

The invention belongs to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a battery monomer assembly, a box body, a first filtering assembly and a gas treatment assembly; the box body is provided with an accommodating cavity, and the battery monomer assembly is accommodated in the accommodating cavity; an exhaust outlet is formed in the box body; the first filtering assembly comprises a shell part and a filling structure, a containing cavity is formed in the shell part, and the filling structure is contained in the containing cavity and used for filtering; the shell part is connected to the box body and is communicated with the exhaust outlet; the gas treatment assembly is arranged at the downstream of the first filtering assembly and is communicated with the first filtering assembly, and the gas treatment assembly is used for adsorbing flue gas and / or converting the flue gas; the gas treatment assembly includes a heating assembly. The flue gas is adsorbed and / or converted, so that the flue gas is effectively treated, and the influence on the environment is reduced.

The utility model provides a cover plate subassembly and battery, the cover plate subassembly includes the cover body, insulation support part and support piece, the cover body is equipped with the explosion-proof valve, the insulation support part and the cover body are arranged oppositely and are attached to each other, the insulation support part is equipped with the exhaust port corresponding to the explosion-proof valve, the support piece is installed on the insulation support part, and the support piece is attached to the explosion-proof valve. The supporting piece is located between the cover body and the core bag, and the melting temperature of the supporting piece is larger than that of the insulating supporting part, so that after the insulating supporting part is melted, the supporting piece can keep the structural integrity of the supporting piece, the cover body and the core bag are supported, the core bag is prevented from being directly and tightly attached to the cover body, and the risk that the anti-explosion valve is blocked is avoided; and normal opening of the explosion-proof valve is ensured to discharge high-temperature and high-pressure gas, so that the risk of battery cell explosion is greatly reduced.

The invention provides a diaphragm and a battery, the diaphragm comprises a base material layer and a first coating located on the surface of one side or two sides of the base material layer, the first coating comprises first particles, the first particles are organic matters containing nitrogen heterocyclic rings, and the average sphericity degree of the first particles is 0.2-0.8, the battery comprises the diaphragm, and the first coating can be applied to the battery. When the diaphragm is impacted by external force and / or falls off, the impact energy can be dispersed, the influence of the impact amount on the diaphragm is reduced, and the impact passing rate and the falling passing rate of the battery are improved.

The utility model relates to the technical field of batteries, and provides a battery cell bracket, a battery module and a battery pack. The battery cell bracket comprises a bracket body, the frame body is provided with a mounting groove. The mounting groove is configured to mount a battery cell. And a pressure relief hole is formed in the groove bottom surface of the mounting groove. And the pressure relief hole corresponds to the position of an anti-explosion valve of the battery cell. The frame body is connected with a flow guide part which is arranged in a protruding mode in the direction away from a groove opening of the installation groove. The flow guide piece covers part of the pressure relief hole. The flow guide piece is configured to enable gas to be discharged in the preset direction after passing through the pressure relief hole. Therefore, gas generated in the battery cell can be discharged out of the bracket body from the pressure relief hole after overflowing from the anti-explosion valve, so that potential safety hazards caused by accumulation of the gas in the battery cell bracket are prevented, and the safety of the battery module is improved.

The invention provides a battery pack upper cover, a battery pack and a vehicle, and relates to the technical field of batteries, the battery pack upper cover comprises a cover body, the cover body comprises a metal layer and a protective layer, the metal layer is provided with a preformed hole penetrating through the metal layer in the thickness direction of the metal layer, and the preformed hole is suitable for corresponding to a pressure relief hole of a battery module of the battery pack. On a projection plane orthogonal to the up-down direction, the projection outer contour of the pressure relief hole is located on the inner side of the projection outer contour of the preformed hole, and the thickness direction of the metal layer is consistent with the up-down direction; the protective layer is connected with the metal layer, at least part of the protective layer covers the reserved hole, and high-temperature smoke sprayed out of the pressure relief hole can damage the part, covering the reserved hole, of the protective layer so that the reserved hole can be communicated with the outside. According to the invention, high-temperature flue gas can be quickly discharged when the battery cell is in thermal runaway, so that the pressure relief of the battery module is realized, the overall structure is simple, and the manufacturing cost is low.

Embodiments described herein relate generally to electrochemical cells having dual electrolytes, systems of such electrochemical cells, and methods for manufacturing the same. In some embodiments, electrochemical cells can include a cathode disposed on a cathode current collector, an anode disposed on an anode current collector, and a separator disposed therebetween. In some embodiments, the separator can include materials that fluidically and / or chemically isolate the anode from the cathode. In some embodiments, the cathode and / or anode can include a slurry of an active material and a conductive material in a liquid electrolyte. In some embodiments, the anode can be fluidically coupled to an anode degassing port. In some embodiments, the cathode can be fluidically coupled to a cathode degassing port.

The utility model belongs to the technical field of batteries, and discloses a single battery and a battery pack. The single battery comprises a fixed frame and a plurality of electrode assemblies, connecting tabs are arranged at two ends of each electrode assembly along a first direction, and the plurality of electrode assemblies are connected in series end to end along the first direction; the connecting tabs close to each other in two adjacent electrode assemblies are in lap joint with each other, an accommodating groove is formed in the end part, close to the other electrode assembly, of one electrode assembly, and the two connecting tabs which are in lap joint with each other are accommodated in the accommodating groove; the fixing frame is arranged on the periphery of the electrode assemblies in a surrounding mode, and a containing cavity for containing the electrode assemblies is formed. According to the single battery, the battery core in the single battery is divided into a plurality of electrode assemblies, so that the length of the single electrode assembly can be reduced, undesirable phenomena such as surface wrinkles, deformation, layer channeling and breakage caused by overlong electrode assemblies are avoided, and meanwhile, the fixed frame is used for fixing the connected electrode assemblies, so that the use safety of the single battery is improved.