240results about "Non-aqueous electrolyte cells" patented technology

The invention discloses a lithium battery processing roundness shaping device and method, and relates to the technical field of lithium battery processing, the lithium battery processing roundness shaping device comprises a positioning frame, and the inner side of the positioning frame is provided with a position adjusting rounding piece connected with a transverse push rod. By arranging the position adjusting and rounding piece and starting the first servo motor, the shortest distance between the edge of the correction roller and the circle center of the supporting plate is adjusted to be equal to the target radius of the battery cell, the telescopic air cylinder is started, the correction roller moves by a certain distance in the direction away from the circle center of the supporting plate, and one-time rounding treatment can be conducted on the battery cell by rotating the correction roller in the same direction; then the telescopic air cylinder drives the movable sleeve plate to move to enable the positioning plate to be attached to the movable sleeve plate again, so that the shortest distance between the correction roller and the circle center of the supporting plate is equal to the target radius of the battery cell, rounding treatment is conducted on the battery cell again through rotation of the correction roller, and therefore part of internal stress of the pole piece and the diaphragm can be released; and material fracture or drape aggravation caused by forced shaping is avoided.

The embodiment of the invention provides an electrode assembly and a manufacturing method and equipment thereof, a battery and a power utilization device, the electrode assembly is used for a battery monomer (100) and comprises a first pole piece (1) and a second pole piece (2) which are opposite in polarity, and each of the first pole piece (1) and the second pole piece (2) comprises a main body part (11) and a tab (12) protruding out of the main body part (11), the first pole piece (1) and the second pole piece (2) are wound around a winding axis (K), so that respective main body parts (11) form a winding main body (S); the end part of the winding main body (S) comprises at least one conductive region (121) and at least one liquid guide region (111), the tab (12) is led out from the conductive region (121), is wound for at least one circle and is used for being electrically connected with a terminal (1022) of a battery monomer (100), and the liquid guide region (111) and the conductive region (121) are arranged adjacently along the radial direction of the winding main body (S) and are used for guiding electrolyte to flow into the winding main body (S).

The utility model belongs to the technical field of rubberizing devices, and particularly relates to a lithium battery winding rubberizing mechanism which comprises a base and a two-way screw, mounting frames are arranged on one side of the top of the base, a first groove is formed in the other side of the top of the base, a rubber belt wheel is arranged between the two mounting frames, and a second groove is formed in the other side of the top of the base. A first groove is formed in the front side wall of the base, a two-way screw rod is installed in the first groove in an embedded mode, a first motor is arranged on the front side wall of the base, and one end of the two-way screw rod is connected with a rotating shaft of the first motor. According to the lithium battery rubberizing device, lithium batteries of different specifications can be rubberized accurately, the lithium batteries are prevented from shaking during rubberizing, the rubberizing accuracy and stability are ensured, and the rubberizing quality is greatly improved.

The utility model discloses a flame-retardant lithium battery which comprises an explosion-proof outer shell and a lithium battery core body, the lithium battery core body is arranged in the inner space of the explosion-proof outer shell, a heat dissipation layer is wrapped outside the lithium battery core body, a flame-retardant belt is wrapped on the surface of one side, far away from the lithium battery core body, of the heat dissipation layer, and the flame-retardant belt is arranged in a multi-layer flame-retardant composite mode. The surface of one side, far away from the heat dissipation layer, of the flame-retardant belt is wrapped with a heat insulation layer, the surface of one side, far away from the flame-retardant belt, of the heat insulation layer is connected with the inner wall of the explosion-proof outer shell, the top of the explosion-proof outer shell is provided with a top cover through an assembly mechanism, the top of the lithium battery core is provided with a positive pole through a positive electrode plate, and the upper end of the positive pole is arranged at the top of the top cover. By arranging a series of structures, good heat dissipation, flame retardance and heat insulation performance are achieved, the flame retardant belts are composited in a multi-layer mode, the flame retardant belts not only have good flame retardance, but also are high in viscosity, the supporting structure strength and the tensile strength are high, and the explosion-proof outer shell and the top cover are assembled in an anti-seepage and sealed mode.

The invention provides a lithium-manganese button cell positive electrode ring prepared based on a dry electrode process as well as a preparation method and application of the lithium-manganese button cell positive electrode ring. The method comprises the following steps: premixing electrolytic manganese dioxide (EMD) powder, a conductive agent and low-melting-point polytetrafluoroethylene (PTFE) fibers in a low-temperature environment; carrying out high-speed shearing on the premixed material to form a dry electrode blank material with self-supporting capability; the obtained dry electrode blank material is subjected to hot rolling through a heating roller device, and an obtained film material is conveyed back to the heating roller device to be subjected to second face rolling; wherein the temperature of the roller is controlled within a temperature range which is lower than the melting point of the PTFE fiber but is enough to enable the PTFE fiber to creep, and meanwhile, high pressure is applied; and die cutting and forming. The positive electrode ring of the lithium-manganese button cell prepared by the method has a unique gradient pore structure and a high-conductivity network, and polarization is greatly reduced, so that the cell is more suitable for an application scene of high pulse current discharge.

The embodiment of the invention provides a preparation method of a high-load electrode with a vertical pore channel structure and a battery, which comprises the following steps: grinding and premixing carbon fluoride and a conductive carbon material in proportion, adding a binder, carrying out high-speed ball milling to obtain fiberized powder, and rolling to prepare an electrode material, thereby obtaining the high-load electrode with the vertical pore channel structure. Compounding the carbon fluoride with a current collector through hot rolling to obtain a positive pole piece; and finally, carrying out laser pore-forming treatment on the positive pole piece to obtain the high-load carbon fluoride electrode with a vertical pore channel structure. The pore diameter of the pore channel structure is 10-100 [mu] m, the pore pitch is 1-10 times of the thickness of the electrode material, the pore depth is 50-100% of the thickness of the electrode material, the ion tortuosity of the electrode is effectively reduced and the ion transmission efficiency is improved by constructing a vertical pore channel, meanwhile, high-energy laser induces an in-situ defluorination reaction on the pore wall to generate a high-conductivity sp2 carbon phase, and the conductivity of the electrode is improved. And the limitation of sacrifice conductivity of a mechanical pore-forming technology is broken through.

The utility model discloses a hot pressing device which comprises a machine frame, an upper-layer hot pressing mechanism, a middle-layer hot pressing mechanism and a lower-layer hot pressing mechanism. The upper-layer hot pressing mechanism comprises an upper-layer installation plate and an upper-layer heating plate arranged at the bottom of the upper-layer installation plate. The middle-layer hot-pressing mechanism comprises a middle-layer mounting plate, a first middle-layer heating plate arranged at the top of the middle-layer mounting plate and a second middle-layer heating plate arranged at the bottom of the middle-layer mounting plate, the lower-layer hot-pressing mechanism comprises a lower-layer mounting plate and a lower-layer heating plate arranged at the top of the lower-layer mounting plate, and the lower-layer mounting plate is arranged at the bottom in the rack; the upper-layer hot-pressing mechanism further comprises two upper-layer heating blocks which are oppositely arranged, and the middle-layer hot-pressing mechanism further comprises two first middle-layer heating blocks which are oppositely arranged, a middle-layer mounting block, two second middle-layer heating blocks which are oppositely arranged and a middle-layer driving assembly. According to the utility model, the hot-pressing shaping time can be shortened, and the hot-pressing shaping efficiency is improved.

The utility model discloses lamination equipment capable of laminating multiple pieces once, which comprises a rack, a positive plate die cutting device, a negative plate die cutting device, a lamination device, a diaphragm unwinding device and a diaphragm pulling device, wherein the positive plate die cutting device and the negative plate die cutting device are oppositely arranged front and back; the positive plate die cutting device comprises a positive plate unwinding mechanism, a positive plate V-angle punching mechanism, a positive plate cutting mechanism, a positive plate detection mechanism and a positive plate conveying line which are sequentially arranged at the top end of the rack from left to right; the negative pole piece die cutting device comprises a negative pole piece unwinding mechanism, a negative pole piece V-angle punching mechanism, a negative pole piece cutting mechanism, a negative pole piece detection mechanism and a negative pole piece conveying line which are sequentially arranged at the top end of the rack from left to right; the battery cell cutting machine further comprises a positive plate pre-positioning device, a negative plate pre-positioning device, a carrying device, a battery cell cutting device and a discharging manipulator. According to the utility model, the production efficiency is improved, and the production cost is reduced.

This invention discloses a fluorinated carbon / halogenated graphene quantum dot composite material, its preparation method, and its applications, belonging to the field of lithium / fluorinated carbon batteries. In this invention, powdered halolated graphene quantum dots and carbon materials are separately dispersed in an organic solvent. A microwave solvothermal method is used, followed by solvent removal to obtain the carbon material / halogenated graphene quantum dot composite material. Then, a gas-phase fluorination method is used to prepare the fluorinated carbon / halogenated graphene quantum dot composite material. The resulting composite material can be used as the positive electrode active material for lithium / fluorinated carbon primary batteries. This invention can improve the capacity performance and discharge capability under high current of lithium fluorinated carbon batteries, while also improving their shelf stability.

The invention relates to a sulfide modified carbon fluoride composite electrode and a preparation method thereof, and belongs to the technical field of battery material preparation. Sulfide and a carbon fluoride material are subjected to ball milling to obtain a sulfide modified carbon fluoride composite material; adding the composite material and a conductive agent into a polymer binder solution to obtain sulfide modified carbon fluoride composite electrode slurry; and coating a current carrier with the slurry, and carrying out vacuum drying to obtain the sulfide modified carbon fluoride composite electrode. According to the invention, the surface morphology and conductive structure of the carbon fluoride material particles are modified by the high-conductive sulfide through a simple ball milling method. The sulfide has multivalent states and structural defect vacancies, not only stabilizes a high discharge platform of the carbon fluoride material at the initial stage of discharge, but also increases a reaction platform at the final stage of discharge, so that the discharge capacity of the carbon fluoride material is effectively improved. And meanwhile, the conductivity and the ion migration rate of the carbon fluoride material are improved, so that the composite electrode has a high working voltage platform and energy output performance under a high-rate discharge condition.

The utility model belongs to lithium sub -power type battery technical field discloses a kind of lithium sub -power type battery negative electrode structure, including upper and lower two negative electrode lithium strips, one layer nickel strip current collector bar and one layer nickel hole current collector net are fixedly arranged between two negative electrode lithium strips;The utility model connects with nickel hole current collector net when the interlayer structure of negative electrode lithium strip-nickel strip current collector bar-nickel hole current collector net-negative electrode lithium strip can also guarantee when breaking down due to the consumption of reaction at the time of reaction to end time;Nickel strip current collector bar and nickel hole current collector net between using spot welding mode connection, nickel strip current collector bar and nickel hole current collector net are pressed together with lithium strip using roll pressing mode, guarantee the firm reliable connection and sufficient contact between both, effectively improve the utilization of negative electrode active material, the load output ability and the safety performance after battery discharge of battery.

The utility model provides a battery cell lower plastic cement dislocation detection tool, and belongs to the field of new energy batteries. The tool comprises a bottom plate, a top plate and detection nails, the top plate and the bottom plate are arranged in parallel at intervals, the detection nails are vertically arranged on the bottom plate, detection holes matched with the detection nails are formed in the top plate, and the detection nails are arranged in the detection holes in a penetrating mode. By adopting the battery cell lower plastic cement dislocation detection tool provided by the embodiment of the utility model, the problem of low identification efficiency in the prior art can be solved.

The embodiment of the utility model provides an air bag tray inflating and deflating device and a lithium battery production system, and relates to the field of lithium battery production. The air bag tray inflation and deflation device comprises a supporting piece, a sliding piece, a floating piece and an inflation and deflation connector. Wherein the sliding part is connected to the top end of the supporting part, the floating part is connected between the sliding part and the inflation and deflation connector, the sliding part is used for driving the inflation and deflation connector to ascend and descend, and the floating part is used for driving the inflation and deflation connector to horizontally float. During inflation and deflation operation, the supporting piece is used for playing a supporting and fixing role, the sliding piece can drive the inflation and deflation connector to ascend and descend so as to be close to or away from the air bag tray, and the floating piece is used for conducting positioning correction through floating in the connection process of the inflation and deflation connector so that the connection positioning efficiency of the inflation and deflation connector can be improved. And the inflation and deflation operation efficiency is further improved. The lithium battery production system comprises the air bag tray inflation and deflation device and has all functions of the air bag tray inflation and deflation device.

The invention belongs to the technical field of battery manufacturing, and provides a positive pole piece of a lithium-manganese dioxide battery and a manufacturing process and application of the positive pole piece. A polymer ion channel coating is arranged on the surface of a positive active layer of the positive pole piece; and the polymer ion channel coating contains a polymer ion channel with a porous structure. By forming the ion channel layer with the porous structure on the surface of the positive electrode, the wettability of the surface of the positive electrode plate to electrolyte can be improved while the stability of the positive electrode is maintained. Moreover, the reaction activity of a polymer ion channel is low, the polymer ion channel cannot react with a positive electrode active substance in the positive electrode or an electrolyte and the like generally, the stability is good, the problem that electrolyte on the surface of the positive electrode volatilizes quickly under the long-term high-temperature condition of a primary battery can be better solved through coating and film forming, and the electrolyte wettability of the surface of the positive electrode is more effectively improved.

The invention relates to the technical field of chemical batteries, in particular to a preparation method of a high-performance lithium primary battery positive plate. The method comprises a process of coating slurry on a metal belt to prepare a pole piece, and the metal belt is prepared by the following steps: S1, carrying out roughening treatment on the surface of a stainless steel belt; s1, the stainless steel band obtained in the step S1 is subjected to punching and drawing to be machined into a rhombic metal net; s2, the metal net obtained in the step S2 is placed in an acid solution to be cleaned, surface impurities are removed, and S3, aluminum plating is conducted on the surface of the cleaned metal net. The aluminum-plated composite net is used in the positive plate, part of manganese dioxide is embedded into an aluminum layer in the rolling process of a compression roller after slurry coating, an active matter is in closer contact with a current collecting net, and the contact resistance is further reduced. Therefore, the positive plate is high in density and low in internal resistance, and the obtained battery is high in capacity, high in energy density and high in large-current load capacity.

This invention provides a thick electrode positive electrode sheet, its preparation method, and a primary battery. The method includes the following steps: first, mixing a positive electrode active material, a conductive agent, and a binder resin to obtain a mixture; then, subjecting the mixture to fibrosis treatment to obtain a fibrous mixture; next, granulating the fibrous mixture with a granulating agent to obtain a precursor material, wherein the granulating agent is a liquid with a vapor pressure not less than 0.2 mmHg; finally, subjecting the precursor material to roll forming to obtain the thick electrode positive electrode sheet. The preparation method provided by this invention can be widely applied to battery systems that require the use of current collectors to fabricate thick electrodes (>500 μm), and solves problems such as the difficulty in continuous automated production of thick electrode sheets using current collectors, high electrode powder shedding rate, and uneven thickness.

An electrode sheet (1), a jelly roll (100) and a battery (1000). The electrode sheet (1) comprises a first sheet body (10) and a second sheet body (20), wherein the first sheet body (10) has a sheet body portion (11) and a tab portion (12), the width of the second sheet body (20) is less than the width of the first sheet body (10), and the second sheet body (20) is connected to one end of the first sheet body (10). The second sheet body (20) is wound to form a wetting channel (101). The wetting channel (101) comprises a port arranged close to the tab portion (12). The sheet body portion (11) is wound around the periphery of the second sheet body (20), the tab portion (12) is configured to be bent towards the port and arranged around the port, and the end of the tab portion (12) away from the sheet body portion (11) encloses to form a through opening (102) in communication with the wetting channel (101). The through opening (102) is in communication with the wetting channel (101), thereby helping an electrolyte to thoroughly wet the electrode sheet (1).

The utility model provides a winding device and relates to the technical field of battery cell manufacturing equipment. The winding device comprises a support, a winding mechanism, a first driving mechanism and a second driving mechanism. The winding mechanism comprises a support, a winding needle piece and a driving piece, the support is rotatably arranged on the support, the first driving mechanism drives the support to rotate, and therefore the winding needle piece arranged on the support can change the position, and the winding needle pieces located at different stations can conduct battery cell winding operation, tail glue pasting operation or battery cell discharging operation conveniently. Under the condition that the corresponding winding needle piece moves to the battery cell winding station, the driving piece drives the winding needle piece to rotate, so that the battery cell winding action is realized; the second driving mechanism drives the winding needle piece to move in the axial direction so that the winding needle piece can achieve needle inserting and needle pulling operation.

The invention provides a lithium-manganese battery. The lithium-manganese battery comprises a positive pole piece, a negative pole piece, a diaphragm and an electrolyte, a positive active material in the positive pole piece comprises manganese dioxide, and the negative pole piece comprises a lithium metal negative pole; the diaphragm comprises a base film and a functional layer positioned on the side, facing the positive pole piece, of the base film; and the functional layer comprises an inorganic solid electrolyte. According to the lithium-manganese battery disclosed by the invention, the diaphragm structure with the inorganic solid electrolyte functional layer is adopted, so that the conduction rate of lithium ions is improved, and meanwhile, the size change of the diaphragm caused by temperature fluctuation or other factors is also remarkably reduced, so that the surface shrinkage rate of the diaphragm is adjusted; and moreover, the side reaction of the lithium metal negative electrode in the use process is effectively inhibited, and the performance of the lithium-manganese battery is improved.

Disclosed are a winding apparatus and a winding method, the winding apparatus includes: a winding needle, being configured to wind a winding material; a power supply assembly, being configured to be electrically coupled to the winding needle, so as to form current on an axis of the winding needle; and a magnet supply assembly, being configured to provide a magnetic field to the winding needle, a magnetic field direction intersecting the axis of the winding needle so that the winding needle generates an ampere force for resisting a deformation of the winding needle in the magnetic field when the winding material is wound. By the above method, the present application may reduce the deformation of the winding needle, reduce a defective rate of a winding product formed by the winding of the winding material, and improve quality of the winding product.

This invention provides a lithium thionyl chloride primary battery and its preparation method. The lithium thionyl chloride primary battery includes a lithium metal anode, a separator, a cathode, and a thionyl chloride electrolyte; wherein, the surface of the lithium metal anode is coated with a nano-metal coating and / or the thionyl chloride electrolyte includes a phthalocyanine metal complex. In this invention, the nano-metal coating protects the lithium metal anode from corrosion by thionyl chloride, prevents self-discharge during storage or idle periods of intermittent discharge, and promotes lithium-ion migration to the cathode; the phthalocyanine metal complex optimizes the reduction reaction of thionyl chloride, increasing the battery's discharge voltage, while reducing the electrolyte resistance, thus improving the high-current discharge performance of the lithium thionyl chloride primary battery. Therefore, this lithium thionyl chloride primary battery can respond quickly when discharge is needed, and does not experience capacity loss when discharge is not required, thereby increasing the overall discharge capacity of the battery.

The invention relates to the technical field of lithium battery manufacturing, in particular to a stripping mechanism and stripping method for a composite pole piece and an electrolyte carrier base membrane, and the stripping mechanism comprises a stripping unit which comprises a stripping roller and a back pressure roller, the gap is configured to be equal to the total thickness of the transferred composite pole piece and the electrolyte carrier base membrane; the clamping roller unit is arranged between the stripping roller and the electrolyte carrier base membrane winding shaft and is used for preventing the winding tension from being transmitted to the stripping unit; wherein the stripping unit is configured to enable the electrolyte carrier base membrane and the composite pole piece to be separated at the gap in an arc-to-arc mode. The stripping yield and the production efficiency of the composite pole piece are remarkably improved, and meanwhile, the method and the mechanism have good applicability to various base membrane materials and electrode systems.

This invention belongs to the field of lithium battery material technology, specifically relating to a metal oxide / mesoporous manganese dioxide / conductive polymer composite material, its preparation method, and its application. The preparation method includes the following steps: 1) ball milling a commercial metal oxide; 2) mixing the metal oxide powder with an organic polymer monomer and a methyl orange solution and ultrasonically dispersing the mixture to obtain a liquid mixture; 3) adding a potassium permanganate solution to the liquid mixture and performing a high-pressure hydrothermal reaction under stirring to obtain the composite material; 4) subjecting the composite material to alkali treatment, filtering, washing with water, and drying to obtain the metal oxide / mesoporous manganese dioxide / conductive polymer composite material. This metal oxide / mesoporous manganese dioxide / conductive polymer composite material can be used to prepare lithium battery cathode materials with high specific capacity, high conductivity, and high stability in a simple, efficient, and low-cost manner. It is easy to industrialize and solves the problems of low conductivity and poor rate discharge performance of traditional metal oxide cathode materials.

The utility model discloses a double-clamp material taking mechanism, and relates to the technical field of battery production. The material taking device comprises a material taking assembly and an overturning driving assembly. A machine head gear is coaxially mounted on the winding machine head main body, and the machine head gear is used for driving the winding machine head main body to rotate so as to switch stations of battery cells; the material taking assembly comprises a rotating shaft, a material taking gear, two sets of material taking sliding table air cylinders and two sets of material taking clamping jaw air cylinders, the material taking gear is installed at one end of the rotating shaft and used for driving the rotating shaft to rotate, the included angle between the two sets of material taking sliding table air cylinders is 180 degrees, and the two sets of material taking clamping jaw air cylinders are installed on the two sets of material taking sliding table air cylinders respectively. The material taking sliding table air cylinder is used for stretching and retracting, and the material taking clamping jaw air cylinder is used for clamping a battery cell; the overturning driving assembly is arranged below the winding machine head body and comprises an overturning servo motor and an overturning driving gear, and the overturning driving gear is meshed with the machine head gear and the material taking gear. The double-clamp material taking mechanism can synchronously carry out material taking and discharging work of naked battery cells.

The invention relates to the technical field of energy storage equipment, in particular to a battery and a manufacturing method, the battery comprises a positive electrode, and raw materials of the positive electrode comprise manganese dioxide, ketjen black, carbon nanotubes and graphene. The weight ratio of the manganese dioxide in the manganese dioxide, the ketjen black, the carbon nano tube and the graphene is 92%-96%. The Ketjen black accounts for 0.5%-2% of the manganese dioxide, the Ketjen black, the carbon nano tube and the graphene by weight. And / or the value range of the weight ratio of the carbon nano tube in the manganese dioxide, the ketjen black, the carbon nano tube and the graphene is 1%-3%. And / or the value range of the weight ratio of the graphene in the manganese dioxide, the ketjen black, the carbon nanotubes and the graphene is 1%-3%. The manufacturing method is used for manufacturing the battery and comprises the following steps: grinding the manganese dioxide, the ketjen black, the carbon nanotubes and the graphene into powder, adding the polytetrafluoroethylene powder, and uniformly stirring to obtain the positive electrode powder.

The utility model discloses a coating gasket capable of improving mutual dissolution of ceramics, which comprises a gasket body, a plurality of ceramic runner plates are arranged on the gasket body, two sides of the ceramic runner plates and the gasket body form main material slurry runners, and ceramic runners are arranged in the ceramic runner plates. A first skiving and a second skiving are arranged on the ceramic runner plate and located on the two sides of the main material slurry runner, and the second skiving is located on one side of the first skiving; and an island part is arranged between the ceramic outlet of the ceramic runner and the second thin part to separate the ceramic outlet and the second thin part. According to the coating gasket, thinning treatment is performed twice at the main material slurry outlet, so that the edge thinning uniformity after the main material slurry is coated is improved, and the problem of mutual dissolution of ceramic and the main material slurry is relieved; and height difference design and island design are carried out on a ceramic outlet of the coating gasket and the second skiving, so that the ceramic slurry is in the lower layer when the ceramic slurry and the main material slurry are in coating contact, and mutual dissolution of the ceramic overflowing into the main material slurry is further improved.

The embodiment of the utility model provides a diaphragm winding mechanism and lithium battery winding equipment, the diaphragm winding mechanism comprises a clamping assembly, a first connecting rod assembly and a driving assembly, the two ends of the first connecting rod assembly are respectively connected with the clamping assembly and the driving assembly; the clamping assembly comprises a first clamping part and a second clamping part arranged corresponding to the first clamping part, and the driving assembly drives the first connecting rod assembly to stretch or retract so as to achieve opening and closing actions of the first clamping part and the second clamping part. According to the diaphragm winding device, the driving assembly drives the first connecting rod assembly to stretch or retract, so that opening and closing actions of the clamping assembly can be achieved, the diaphragm is clamped, the diaphragm can enter winding work more quickly, and the working efficiency is improved.

The utility model provides a battery top cover assembly and a square battery, and relates to the technical field of batteries, and the battery top cover assembly comprises a cover plate, the lower insulating part is positioned on the bottom surface of the cover plate; the switching piece is arranged on the side, away from the cover plate, of the lower insulating part, the pole comprises a disc body and a pole body fixedly connected with the disc body, the pole body penetrates through the mounting hole, the lower insulating part and the switching piece and enables the switching piece, the lower insulating part and the cover plate to be riveted, and the disc body is located on the top face of the cover plate; the sealing piece comprises a first sealing part and a second sealing part which are connected with each other, the first sealing part is located between the outer wall of the column and the inner wall of the mounting hole, and the second sealing part is located between the disc body and the top surface of the cover plate. According to the battery top cover assembly disclosed by the utility model, the pole is reversely riveted from the bottom surface, a riveting block is omitted, the weight is reduced, the requirement of light weight of the battery is met, and the energy density of the battery is favorably improved. And two welding procedures are omitted, the complexity in the manufacturing process of the battery top cover assembly is reduced, and the cost is reduced.

This invention relates to a battery cell stacking apparatus, including a stacking mechanism, a first feeding mechanism, and a second feeding mechanism. The stacking mechanism includes a stacking table, a first pressing blade, and a second pressing blade. During the stacking operation, the first pressing blade is in an open state while the second pressing blade is in a clamping state. After the first feeding mechanism inserts the provided first wafer between the first pressing blade and the stacking table, the first pressing blade switches to the clamping state while the second pressing blade switches to the open state. Then, after the second feeding mechanism inserts the provided second wafer between the second pressing blade and the stacking table, the second pressing blade switches to the clamping state while the first pressing blade switches to the open state. This process is repeated to complete the stacking of the battery cells. Therefore, when using the above-described battery cell stacking apparatus to manufacture battery cells, it is unnecessary to use a robotic arm to reciprocate and grasp the positive electrode, negative electrode, and separator. Thus, the above-described battery cell stacking apparatus can significantly improve the efficiency of battery cell production.

The invention relates to the technical field of electrochemical batteries, in particular to an assembling method of a combined lower cover of a lithium primary battery. The method sequentially comprises the steps of assembling an explosion-proof membrane in a bottom cover, assembling a stainless iron sheet in the bottom cover, sealing for the first time and sealing for the second time, and further comprises a step A and a step B. A, after the explosion-proof membrane is arranged in the bottom cover, the explosion-proof membrane needs to be preheated, and then the stainless iron sheet is assembled; and B, carrying out heat sealing on the explosion-proof membrane between the primary sealing step and the secondary sealing step. The preheating means that an integrated preheating module is adopted to heat the explosion-proof membrane, the heating temperature is 90-120 DEG C, and the heating time is 1.5-3 seconds. The heat sealing temperature of the explosion-proof membrane is 250 + / -5 DEG C, and the heat sealing time is 1.5 + / -0.1 s. By optimizing the procedure sequence, adding preheating treatment and improving the fixing mode, the problems of missing adding and falling of stainless iron sheets in the traditional process are thoroughly solved, and meanwhile the product assembling quality, consistency and production efficiency are improved.