908 results about "Dry cell" patented technology

The invention relates to the technical field of solar cells, and provides a back contact cell assembly and a photovoltaic system.The back contact cell assembly comprises a plurality of cell strings and bus bars, a first welding strip comprises a body section, a bent section and an extending section, and the body section is welded to a first cell piece through a welding spot; the extension section extends between a second welding strip and a fourth welding strip which are adjacent to each other on the second battery piece and is at least partially overlapped with the bus bar so as to be welded with the bus bar, and the body section and the extension section are connected through a bending section; in the thickness direction of the back contact battery assembly, the extension section and the second welding strip do not have an overlapped part, and in the second direction, the distance D between the extension section of at least one first welding strip and the adjacent second welding strip meets the following relational expression: 1 mmlt; d < = 0.63 * arctan (1.8 * L * D2 + H) * (D1-W). Therefore, the hidden crack risk in the lamination process can be reduced, the electrical loss of the assembly can be reduced, the double-sided rate of the assembly can be improved, and the difficulty of the manufacturing process can be reduced.

The invention provides a back contact battery assembly and a photovoltaic system, a back contact battery can comprise a plurality of battery strings and a bus bar, a first welding strip comprises a first body section connected with a first battery piece and a first extension section which extends to a second battery piece and is at least partially overlapped with the bus bar, the second welding strip comprises a second body section and a second extension section. And in the thickness direction of the back contact battery assembly, the first extension section and the second extension section do not have an overlapped part. The bus bar is provided with a protruding section protruding towards the side away from the second battery piece at the second extension section, and the bus bar is provided with a recessed section recessed towards the side of the second battery piece at the first extension section. For at least part of the cross section of the bus bar, the included angle alpha between the connecting line between the highest point of the convex section and the lowest point of the adjacent concave section and the plane where the second battery piece is located meets the following formula: 0.075 < = tan alpha < = 3. In this way, the hidden crack risk in the laminating process can be reduced.

The invention relates to the technical field of photovoltaic energy storage cabinets, in particular to a safety type photovoltaic energy storage cabinet. Comprising an outer shell, a plurality of inner shells are fixedly connected in the outer shell, battery packs are detachably and fixedly connected in the inner shells, cooling fans which are symmetrically distributed are arranged outside the outer shell, each inner shell is provided with two cooling row holes which are symmetrically distributed, and the inner shells are slidably connected with two plugging frames which are symmetrically distributed. The two plugging frames on the inner shell are jointly provided with a connecting frame, the inner shell is fixedly connected with a sliding rail, an electric sliding block is slidably connected into the sliding rail, and the electric sliding block of the sliding rail is fixedly connected with the adjacent connecting frame. According to the invention, the temperatures of the plurality of battery packs during charging are respectively detected, and heat dissipation of different degrees is carried out according to different temperatures of the plurality of battery packs, so that the plurality of battery packs are at proper temperatures, cooling resources are allocated as required, energy is saved, and operation cost is reduced.

The invention provides a back contact battery assembly and a photovoltaic system, a back contact battery can comprise a plurality of battery strings and a bus bar, each battery string comprises a plurality of battery pieces which are sequentially connected in series along a first direction, and the plurality of battery pieces comprise a first battery piece arranged at the end part of the battery string and a second battery piece adjacent to the first battery piece; the back of the first cell is provided with a first solder strip, and the back of the second cell is provided with a second solder strip. The first welding strip is connected with the first battery piece and is provided with an extension section which extends to the second battery piece and is at least partially overlapped with the bus bar, and the second welding strip comprises a main body section which is not overlapped with the bus bar and an extension section which is overlapped with the bus bar; the main body section extends along the first direction, an extension line of the main body section in the first direction is at least partially overlapped with the first welding strip, the extension section and the main body section are mutually spaced in the second direction, and the extension section and the extension section do not have an overlapped part in the thickness direction of the back contact battery assembly. In this way, the hidden crack risk in the laminating process can be reduced.

The invention provides a photovoltaic module, and relates to the technical field of photovoltaics. The photovoltaic module comprises an interconnection piece and a plurality of battery pieces. The battery piece comprises a current collection electrode which is arranged on the side, away from the doped conductive layer, of the passivation layer, the current collection electrode comprises a transmission part and a plurality of contact parts, and interval areas exist between the adjacent contact parts in the first direction; the transmission part is arranged on one side, far away from the semiconductor substrate, of the contact part and is in contact connection with the plurality of contact parts; the plurality of interconnection parts are electrically connected with the current collection electrodes; along the second direction, the plurality of interconnection parts are arranged in rows to form interconnection part rows; in the battery piece, the areas located in the two opposite boundaries of the interconnection part columns in the first direction are confluence areas, and at least one confluence area is provided with at least one part of at least one contact part and a partial transmission part. The pulling force of the current collection electrode and the semiconductor substrate can be enhanced, falling or pulling-off is avoided, and meanwhile collection and transmission of current are facilitated.

The utility model discloses a battery pack upper cover and an energy storage device, the battery pack upper cover is of an integrally formed structure, the battery pack upper cover comprises a top plate, a first side plate and a second side plate which are oppositely arranged on two sides of the top plate, and a first end plate and a second end plate which are oppositely arranged on the other two sides of the top plate, and the battery pack upper cover is provided with a plurality of inwards sunken pressing ribs. The energy storage device is provided with a lower box body with a containing cavity, a plurality of battery packs located in the containing cavity and the battery pack upper cover in the first embodiment, and the battery pack upper cover is matched with the lower box body to seal the containing cavity. The battery pack upper cover disclosed by the utility model can be formed at one time, is beneficial to standardized production, reduces the production and processing cost, and accelerates the product delivery speed; according to the energy storage device, the battery pack upper cover is used, so that the battery cells and other devices in the energy storage device can be protected, the protection and touch prevention effects are achieved, meanwhile, the IP67 sealing performance test is met, and the production and delivery requirements of energy storage device products are met.

The invention discloses a liquid-cooled dynamic battery cluster temperature management protection device and a temperature control method, and relates to the field of battery temperature control, and the temperature management protection device comprises a liquid cooling control terminal which is used for butting and integrating an energy storage end of a plurality of battery units and providing circulating liquid cooling synchronous with the starting of the battery units, control instructions are edited, received and issued; the data acquisition module is used for dividing a liquid cooling circulation route into a plurality of sections and detecting temperature data of liquid in different sections in the charging and discharging state process of each battery unit; the temperature deviation of each section is identified in real time, a problem area is rapidly positioned, more comprehensive and accurate temperature distribution can be obtained, abnormal conditions are helped to be identified and positioned in real time, the response speed to transient load change is improved, it is ensured that the battery is kept in a safe temperature range in the rapid charging and discharging process, and the battery quality is improved. And fault hidden dangers caused by insufficient temperature monitoring capability are avoided.

The invention relates to the technical field of solar cells, and provides a back contact cell assembly and a photovoltaic system.The back contact cell assembly comprises a plurality of cell string units, and back contact cell pieces, covered with insulating strips and bus bars, in cell strings of the cell string units are first cell pieces; and the back contact battery piece which is not covered with the insulating strip and the bus bar is a second battery piece. And the length W of the first battery piece in the first direction meets the following relational expression: W is greater than or equal to W0 + D1 + (1-a%) * (D2-D1). Therefore, on one hand, the insulating strip and the bus bar are arranged on the back surface of the back contact battery piece of the battery string, so that the effective light receiving area of the assembly can be increased, and the attractiveness of the assembly is improved. And on the other hand, the size of the first battery piece covered with the insulating strip and the bus bar is specially designed, and the size of the first battery piece covered with the insulating strip and the bus bar in the first direction is correspondingly increased, so that the double-sided rate of the module can be improved, and the power of the module can be ensured.

The invention relates to the technical field of fuel cells, in particular to a heat dissipation device for hydrogen fuel cell stacks, which comprises a through pipe, a drainage fan, drainage plates and an opening degree adjusting assembly, a plurality of cell stacks are arranged between two end plates, a cooling cavity is formed between the adjacent cell stacks, and cooling plates are arranged on two sides of each cell stack, so that the heat dissipation effect is improved. External air is conveyed to the cooling cavities through the penetrating pipes penetrating through the end plates and the cell stack, airflow power is provided by the drainage fans, the air exchanges heat with the cooling plates in the cooling cavities and then is guided to the outer side surface of the cell stack through the drainage plates arranged around the cooling cavities, and directional cooling of a cell stack shell is achieved. The opening adjusting mechanism is arranged in the cooling cavity, and the distance between the drainage plate and the surface of the cell stack can be adjusted in real time according to temperature feedback, so that the section and the flow speed of an airflow outlet are changed, the heat dissipation intensity of the outer side of the cell stack is dynamically controlled, and the problem that the temperature of the outer side of an existing hydrogen fuel cell stack is not easy to control is solved.

The invention discloses a solid-state lithium battery and a preparation method thereof and belongs to the technical field of battery processing. The preparation method of the solid-state lithium battery comprises the following steps: S1, assembling a positive plate, a diaphragm and a negative plate into a dry cell; wherein a composite film layer is cured on a current collector base material of the negative plate, and rubidium nitrate is added into the composite film layer; s2, injecting the gel precursor solution into a dry battery cell, fully standing, and charging the battery cell to 100% SOC; wherein the gel precursor solution contains an electrolyte, a cross-linking agent and an initiator; and S3, heating to initiate a chemical cross-linking reaction of a cross-linking agent in the gel precursor solution, and carrying out in-situ polymerization and curing on the surface of each component of the dry cell and in internal pores thereof to obtain a gel polymer electrolyte, thereby forming the solid-state lithium battery. According to the invention, the interface resistance can be reduced, and the lithium ion transmission capability and efficiency are improved.

The invention is applicable to the field of photovoltaic technology, and provides a battery assembly and a photovoltaic system, the battery assembly comprises a plurality of battery strings, a glass plate and a reflective layer; each battery string comprises a plurality of battery pieces, each battery piece comprises a chamfered edge with a chamfer and a straight edge without a chamfer, the chamfered edges and the straight edges in the battery pieces are opposite, and the plurality of battery pieces are sequentially arranged along a first direction; the plurality of battery strings are arranged in parallel, the arrangement directions of the battery pieces in the adjacent battery strings are opposite, and a string spacing is formed between the adjacent battery strings; a plurality of battery strings are arranged on one surface of the glass plate, the reflective layer is arranged on the glass plate, the reflective layer comprises a longitudinal film covering the distance between the strings, and a widening part is arranged on the longitudinal film to cover the gap between four adjacent battery pieces. The longitudinal film covers the string spacing, so that the light which originally directly passes through the string spacing is reflected and then utilized by the battery piece; the chamfered edges of the battery pieces enable the gaps of the battery strings to be increased, and the widened parts on the longitudinal films can cover the gaps among the four adjacent battery pieces, so that the light utilization is optimized.

The utility model discloses a sodium ion battery cap welding device, which relates to the technical field of laser welding and comprises a workbench, two sliding rods are fixedly connected to two sides of the axis of the top end of the workbench, a first tray is slidably connected to the outer walls of the sliding rods, and the axis of the first tray corresponds to the axis of the workbench. A plurality of battery fixing pieces are fixedly installed at the positions, close to the edge, of the top of the first tray at equal intervals, a cantilever is fixedly connected to one end of the top of the workbench, and a second tray is fixedly connected to the bottom of the tail end of the cantilever; a plurality of battery welding assemblies corresponding to the battery fixing pieces are fixedly connected to the positions, close to the edge, of the bottom of the second tray at equal intervals. According to the technical scheme provided by the utility model, the laser welding technology is matched with the balls, so that the laser welding head can rotate around the sodium ion battery cap at a constant speed, the cap can be uniformly welded on the battery, and the defective product occurrence probability that the cap falls off due to single-point welding or non-uniform welding is reduced.

Described herein are systems, methods, processes, and devices for transferring energy from an uncrewed battery-recharging vehicle to an electric vehicle, such as a car. In one example, the uncrewed battery-recharging vehicle is delivered by a distribution vehicle close to the location of the electric vehicle. The uncrewed battery-recharging vehicle identifies the electric vehicle, properly aligns itself underneath the parked electric vehicle, and transfers energy to the rechargeable battery component of the electric vehicle.

The invention provides a back contact battery assembly and a photovoltaic system, a back contact battery can comprise a plurality of battery strings and a bus bar, a first welding strip comprises a first body section connected with a first battery piece and a first extension section which extends to a second battery piece and is at least partially overlapped with the bus bar, the second welding strip comprises a second body section and a second extension section. And in the thickness direction of the back contact battery assembly, the first extension section and the second extension section do not have an overlapped part. The bus bar is provided with a protruding section protruding towards the side away from the second battery piece at the second extension section, and the bus bar is provided with a recessed section recessed towards the side of the second battery piece at the first extension section. For at least part of the cross section of the back contact battery assembly at the bus bar, the height difference between the highest point of the first extension section and the highest point of the adjacent convex section is smaller than the thickness of the first welding strip. In this way, the hidden crack risk in the laminating process can be reduced.

The invention discloses an automatic monitoring system and method of a lead storage battery, relates to the technical field of battery monitoring, and solves the technical problem that the accuracy and efficiency of an automatic monitoring system of a battery are relatively low due to the fact that frequent charging and discharging and the influence of corresponding interval duration on battery aging are not fully considered in the prior art. A plurality of time clusters are generated according to charging and discharging data; calculating a plurality of battery aging coefficients according to the plurality of time clusters and calculating and monitoring a battery aging coefficient; calculating a monitored battery pack aging coefficient according to the monitored battery aging coefficient and then generating a battery pack estimated service life; an alarm signal is generated according to the estimated service life of a battery pack, charging and discharging behaviors of a battery are converged, the influence of frequent charging, the charging and discharging process and other factors on battery aging is considered, the state of each stage of a battery life cycle is calculated, the condition of the battery life cycle is effectively mastered, and the battery life cycle is accurately and accurately determined. And the accuracy and the efficiency of the automatic battery monitoring system are improved.

The invention is suitable for the technical field of solar cells, and particularly relates to a photovoltaic module and a photovoltaic system.The photovoltaic module comprises a plurality of battery pieces, and each battery piece comprises a battery piece substrate; the main grid is arranged on at least one surface of the battery piece substrate; the PAD points are arranged on the main grid and are distributed at intervals along the extension direction of the main grid; the PAD points comprise end part PAD points close to the end part of the main grid and middle PAD points positioned between the end part PAD points; the height of at least one end PAD point is greater than the height of at least one middle PAD point. By designing the height of the end part PAD point close to the end part of the main grid to be higher than the height of the middle PAD point, the end part PAD point is higher and fuller, so that the over-welding condition of the end part PAD point close to the end part of the main grid is avoided, and the welding quality and the product quality are ensured.

The invention discloses a battery replacement system and method for a battery replacement cabinet, relates to the technical field of battery management, and solves the technical problem that the battery replacement effect is poor due to the fact that the priority is relatively fixed by taking the electric quantity of a battery as a priority judgment standard in the prior art. A battery health score is generated based on battery cabinet data, and an exclusive charging strategy is generated; generating a battery dynamic priority based on the battery cabinet data and the battery health score; the batteries are replaced according to the sequence of the dynamic priorities of the batteries from high to low, the current state and the overall health state of the batteries are monitored in real time, and the battery replacement priority of the batteries is dynamically adjusted through the multi-source data of the batteries, so that the batteries in the battery replacement cabinet can be replaced in an optimal mode, and the effect of the battery replacement method is improved.

The utility model discloses a mounting structure, a battery device and electric equipment, and relates to the technical field of batteries, the battery device comprises a battery box body, a plurality of battery monomers arranged in the battery box body, a box body beam and a mounting structure, the battery box body is provided with a connecting hole, and the mounting structure comprises a first locking piece and a second locking piece; one end of the first locking piece is connected to the box body beam, and the other end of the first locking piece abuts against the inner wall of the battery box body and is arranged around the connecting hole; at least part of the second locking piece is arranged outside the battery box body, one end of the second locking piece penetrates through the connecting hole and extends into the battery box body so as to be connected with the first locking piece, an assembly hole is formed in the end, away from the first locking piece, of the second locking piece, and the assembly hole is configured to be connected with a fastener of a carrier in a matched mode. According to the technical scheme provided by the invention, the problem of high airtight failure risk of the battery device can be solved.

The utility model discloses a battery, electric equipment and an energy storage device, and relates to the technical field of energy storage and power batteries. The battery comprises a plurality of battery monomers, a metal bandage and an insulating part, the plurality of battery monomers are arranged side by side, and each battery monomer comprises a metal shell; the metal bandage bypasses the plurality of battery monomers and is used for binding the plurality of battery monomers; the insulating part is connected to the battery monomer or the metal bandage, and at least part of the insulating part is positioned between the battery monomer and the metal bandage; the insulation resistance value between the metal bandage and each metal shell is greater than or equal to A * B * 1000 ohm, A is the nominal voltage of the single battery, and the unit is V; b is the series connection number of the single batteries, and the unit is one. According to the technical scheme provided by the utility model, the problem that insulation failure is easy to occur between the metal bandage and the battery monomer during thermal runaway can be improved.

The utility model relates to a liquid-cooled battery box and a battery pack assembly, the box comprises a main body, the main body comprises a cover piece, a coaming and a bottom plate, the lower end of the coaming is connected with the bottom plate to form an accommodating space for installing a battery module, the upper end of the coaming is connected with the cover piece, and the cover piece is connected with the bottom plate. The cover part is used for installing the battery module in the accommodating space in a sealing manner, the bottom plate comprises at least one connecting plate, the connecting plate is used for circulating a cooling medium, at least two separators are arranged in the accommodating space, and the separators are in contact and connected with the left side and the right side of the battery module; the battery pack assembly comprises the box body and a plurality of battery modules installed in the box body, the structure is simple, the space utilization rate of the box body is improved, and the battery pack assembly has stable and efficient cooling efficiency.

A lithium battery monitoring management system based on big data comprises a battery module frame, a plurality of battery bins are arranged in the battery module frame in a matrix mode, the battery module frame is connected with a data processing module through an interaction module, and the data processing module is electrically connected with an ultrasonic detection module; the ultrasonic detection module comprises an ultrasonic transmitting unit and an ultrasonic receiving unit and is used for accurately detecting microdefects in the battery, the ultrasonic transmitting unit is an ultrasonic transducer with adjustable frequency, the transmitting frequency range of the ultrasonic transmitting unit is 0.5 MHz to 20 MHz, and the ultrasonic transmitting unit is used for transmitting ultrasonic waves to the battery; the ultrasonic receiving unit is matched with the ultrasonic transmitting unit, receives the ultrasonic signals reflected and transmitted by the battery and converts the ultrasonic signals into electric signals. Tiny damage in the battery is accurately detected through the arranged ultrasonic detection module, the hidden danger recognition precision is greatly improved, potential faults can be perceived in the early stage, precautions are taken in the bud, the sudden failure risk of the battery is reduced, and the overall service life of the battery is prolonged.

The invention discloses an abnormal battery detection method based on voltage change characteristics and local abnormal factors, relates to the technical field of battery detection, and solves the technical problems that only abnormity of a battery pack can be detected and abnormal batteries in the battery pack cannot be determined in the prior art. The method comprises the following steps: acquiring real-time operation data of a lithium ion battery pack from a cloud database, and preprocessing the real-time operation data; extracting standard voltage data from the preprocessed real-time operation data, and screening out suspected abnormal batteries according to the standard voltage data by using a 3 sigma criterion; according to the standard voltage data, extracting feature data of a plurality of batteries in a PCA mode; calculating the internal resistance of the battery according to the real-time operation data; screening real abnormal batteries from the suspected abnormal batteries according to the characteristic data and the internal resistance of the plurality of batteries; the accuracy of an abnormal battery detection result can be improved, and thermal runaway early warning can be made in advance.

The invention discloses a lithium battery fire extinguishing system, and belongs to the technical field of lithium battery fire extinguishing, the lithium battery fire extinguishing system comprises an energy storage cabin, the energy storage cabin is used for arranging a plurality of battery clusters, each battery cluster comprises a plurality of stacked battery modules, a fire water monitor is installed in the energy storage cabin, and the fire water monitor sprays a fire extinguishing medium to any battery cluster; a water collecting tank is arranged at the bottom of the battery cluster and is used for collecting the fire extinguishing medium flowing down from a plurality of battery modules of the battery cluster; a liquid supply assembly is arranged in the water collecting tank, filling openings are formed in the outer box body of the battery module, and the liquid supply assembly supplies the fire extinguishing medium in the water collecting tank into any filling opening through a pipeline assembly. The device has battery cluster external fire extinguishing and battery module internal fire extinguishing medium filling functions, realizes cyclic utilization from external fire suppression to internal cooling of the battery module after the fire extinguishing medium is sprayed, and improves economical efficiency and reliability; the system is low in complexity and easy to overhaul and maintain; the modification cost is low.

The present invention relates to the field of energy storage and off-grid control technology, and in particular to an on-grid and off-grid parallel system and its control method. The number of the electric cabinets is N, and each of the electric cabinets is provided with a plurality of battery modules, the plurality of battery modules are connected to the control box through insulated cables, and the control box is pre-charged and connected to the PCS energy storage inverter module; the PCS energy storage inverter module is connected to the backup power supply end of one STS module, and the main power supply end of the other STS module is connected to the municipal power grid, and the output end of the municipal power grid in the STS module and the output end of the PCS energy storage inverter module are connected to the load end, so that the on-grid and off-grid can be seamlessly switched. The present invention can realize on-grid and off-grid switching power supply, so that it can continuously supply power to important power loads, so that the key loads can operate uninterruptedly and stably, avoid the losses caused by power outages, and improve the flexibility, safety and operation stability of the system power supply.

A powder dispensing apparatus having an elongate wedge-shaped hopper including one or more fluidized plates is described. The powder dispensing apparatus can be positioned above a pair of calender rolls to distribute a powder, such as a dry electrode material onto the calender rolls. Such fluidized wedge shaped hopper advantageously allows for an accurate and / or controlled rate of powder distribution across or substantially across the length of a calender roll.

The invention discloses a Bluetooth communication device and method in a charging equipment cabinet, and the device comprises a main control unit and a plurality of battery modules, the main control unit is electrically connected with a first wireless communication module, and the battery modules are electrically connected with a second wireless communication module; the first wireless communication module is in communication connection with all the second wireless communication modules; and a certain second wireless communication module is in communication connection with all the other second wireless communication modules. Cabinet wire harnesses are reduced, the communication interaction cost is reduced, and the communication reliability is improved.

The present application relates to the field of photovoltaic technology, and discloses a half-cut photovoltaic cell string and a photovoltaic module. The half-cut photovoltaic cell string comprises multiple cells and multiple ribbons. By arranging the multiple cells in a first direction, the cut surface of one of two adjacent cells corresponds to the isolation surface of the other of the two adjacent cells, and the orientations of the positive and negative electrodes of the cells are kept consistent, facilitating subsequent welding operations; a same ribbon connects two adjacent cells, achieving series connection of the multiple cells; in addition, by configuring the distance L1 between each ribbon and a first intersection line and the distance L2 between the ribbon and a second intersection line to satisfy the condition L1>2×L2, the distance from the ribbon to a PN junction on the cut surface is much greater than the distance from the ribbon to a corresponding position of a PN junction on the isolation surface, thereby avoiding the risk that the ribbon is too close to or in contact with the exposed PN junction on the cut surface, mitigating electric leakage or short circuits, and improving the reliability of the half-cut photovoltaic cell string.

The invention relates to a battery inclination detection method and device and a computer readable storage medium, and the method comprises the steps: obtaining a material frame and depth images of a plurality of batteries carried by the material frame; determining a battery image of each battery in the depth image, and for any battery image, determining different detection directions and a detection normal vector corresponding to each detection direction according to a preset included angle; determining a reference plane based on a material frame in the depth image, and determining a reference normal vector according to the reference plane; determining a deviation angle and a height difference of the battery in the detection direction according to any detection normal vector and the reference normal vector; in any detection direction, if any one of the deviation angle and the height difference meets the inclination standard, the current battery is inclined. According to the invention, the accuracy of checking the placement state of the battery is improved.

An electrode fabrication system is provided. The system includes a powder feeding unit, a powder charging unit, a carrier roller, a carrier roller charging unit and a calendering unit. The dry powder particles applied from the powder feeding unit are charged and attached onto the carrier roller surface through an electrostatic process by applying a proper bias voltage. The charged powder attached on the surface of carrier roller are released and deposited onto a moving foil web to form a powder coating layer through an electrostatic process by applying a proper bias voltage. The powder coating layer is conveyed to the calendering unit and densified with or without heat to form an electrode.