506 results about "Dry cell" patented technology

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 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.

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 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 discloses a cold plate-based battery thermal management system and an operation control method thereof. The system comprises a plurality of battery units, two liquid cooling plates and a filling material, the battery units are vertically arranged between the two liquid cooling plates; and the filling material is embedded among the battery units. According to the operation control method, the temperature field of the battery unit is monitored in real time, and the flow direction of the cooling liquid in the liquid cooling plate is dynamically adjusted according to the temperature difference of the battery pack and the highest temperature monitoring result, so that more low-temperature cooling liquid can be guided to the area of the battery unit with higher temperature. Compared with traditional fixed-period reciprocating flow, the battery thermal management system based on the cold plate and the operation control method of the battery thermal management system achieve lower battery pack temperature difference and better battery pack temperature uniformity under the condition that the reversing times of cooling liquid are the same, so that the service life of the battery pack is prolonged, and the performance of the battery pack is improved; the method has the advantages of simple operation, good adaptability, low operation cost and good temperature control effect.

The invention discloses an all-solid-state lithium battery and a preparation method thereof, and belongs to the technical field of lithium ion batteries. The preparation method of the all-solid-state lithium battery comprises the following steps: S1, preparing a positive plate; s2, uniformly mixing a sulfide solid electrolyte and a binder to form an electrolyte-binder skeleton layer, and compounding the electrolyte-binder skeleton layer with the positive plate; s3, compounding the negative plate with the electrolyte-binder skeleton layer compounded with the positive plate, wherein the positive plate and the negative plate are respectively positioned on two sides of the electrolyte-binder skeleton layer; cutting and packaging into a dry battery cell; s4, uniformly mixing a lithium salt, a thermal initiator and a polymer monomer to form a polymer solid electrolyte precursor; and injecting the polymer solid electrolyte precursor into the dry cell, fully infiltrating, heating and curing to form the all-solid-state lithium battery. According to the preparation method disclosed by the invention, the mechanical strength and the electronic insulativity of the sulfide solid electrolyte are improved by an in-situ polymerization process, and the electrical property of the all-solid-state lithium battery is improved.

This item is a case for a dry cell battery.

The utility model relates to the technical field of solar cells, and discloses a solar cell string and a solar cell module, the solar cell string comprises a plurality of cells, the cells are provided with grid lines, and the grid lines are provided with pad points; the plurality of welding strips are used for connecting the battery pieces and enabling the battery pieces to be arranged in sequence; each welding strip is connected with the pad point, each welding strip is connected with the battery piece and / or the grid line through a pre-fixing point, and the pre-fixing point is a non-UV glue point. According to the solar cell string, each welding strip is connected with the cell piece and / or the grid line through the pre-fixing points, a good pre-fixing effect is achieved on each welding strip, arrangement of UV glue and curing operation of the UV glue are avoided, working procedures are reduced, meanwhile, cost is reduced, and the solar cell string is good in reliability and stable in performance.

A method for forming a shaped battery can include: adding electrolyte to a dry battery cell, shaping the battery cell, relieving stress and / or strain from the battery cell, curing the electrolyte, and / or injection moulding a thermoplastic or thermoset around the battery cell. A battery cell can include a cathode, an anode, a separator disposed between the cathode and the anode, a gel polymer electrolyte, an overmoulded housing surrounding the cathode, the anode, the separator, and the gel polymer electrolyte, where the battery cell comprises a non-zero radius of curvature about at least 1 axis.

The invention relates to the technical field of networking type energy storage systems, and discloses a series battery equalization circuit suitable for networking type energy storage, an equalization method and application, the series battery equalization circuit comprises a symmetrical equalization module and a conversion module, the conversion module is connected with a battery pack formed by connecting a plurality of batteries in series and the symmetrical equalization module, and the conversion module is connected with the symmetrical equalization module. The conversion module is used for converting direct current output by the battery pack into alternating current and inputting the alternating current into the symmetrical equalization module; and the symmetrical equalization module is used for realizing voltage equalization of each battery in the battery pack in a symmetrical equalization mode according to the alternating current characteristics of the alternating current. According to the invention, the symmetrically designed equalization modules are adopted, the circuit structure is simplified, the equalization efficiency is ensured, and the method is suitable for large-scale application of a network-forming type energy storage system.

The utility model relates to a cell string and a photovoltaic assembly, comprising a plurality of cell sheets and a solder strip connecting adjacent cell sheets in series, the solder strip has a bottom and two opposite side portions, the two opposite side portions of the solder strip and the surfaces of the cell sheets are fixed through adhesive glue, and the bottom of the solder strip is provided with a bottom surface. The bottom and the surface of the battery piece are attached in a surface contact mode or a line contact mode, and no adhesive is arranged between the bottom and the surface of the battery piece. According to the fixing mode between the welding strip and the battery piece of the battery string, the bonding glue is arranged between the two side parts of the welding strip and the battery piece, and the welding strip is fixed on the battery piece from the side surface, so that the problem of insufficient welding caused by the fact that the bonding glue enters the bottom of the welding strip can be avoided.

The utility model discloses a dry battery electrolyte purification device which comprises a spray tower, a cyclone port is arranged at the top of the spray tower and is used for introducing alkaline gas and enabling the alkaline gas to spirally fall down, and a spray assembly is arranged in the spray tower; the spraying assembly comprises a liquid inlet pipe rotationally connected to the top end of the spraying tower, an annular pipe is arranged below the liquid inlet pipe, and a plurality of atomizing nozzles are arranged on the annular pipe at equal angles; the device overcomes the defects in the prior art, is reasonable in design, enables the reaction to be more thorough through the contact time of alkaline gas and acid solution, and has higher social use value and application prospect.

The invention discloses a high-safety battery pack which comprises a shell and a plurality of batteries, an upper cover plate is arranged at the upper end of the shell, a lower cover plate is arranged at the lower end of the shell, the interior of the shell is divided into a plurality of mutually independent battery chambers through partition plates, the batteries are placed in the battery chambers respectively, a supporting plate is arranged in the lower end of each battery chamber, and a plurality of pre-opening areas are arranged on the lower cover plate. The periphery of the pre-opening area is provided with a thinning groove. According to the high-safety battery pack disclosed by the invention, the pre-opening area can quickly and accurately release thermal runaway gas, so that shell damage and fire spreading are avoided; the conical supporting column gives consideration to supporting, heat dissipation and buffering, and not only guides airflow but also prevents the battery from expanding and cracking; the silicon-based damping paste realizes damping and heat dissipation, and can be cured and insulate heat at high temperature; the independent battery chamber and the cooling fins optimize heat dissipation, the problems of thermal runaway, unbalanced heat dissipation and shock absorption, insufficient fire prevention and the like of a traditional battery pack are effectively solved, the service life of the battery is prolonged, and the application safety is improved.

The utility model relates to the technical field of battery compartments, in particular to a waterproof and dustproof sealed multi-section battery compartment. The battery compartment comprises a compartment body, a side cover plate is welded to one side of the compartment body through ultrasonic waves, a front cover plate is welded to the surface of the compartment body through ultrasonic waves, a plurality of battery bodies are installed in the compartment body, positive and negative nickel sheets are connected to one ends of the battery bodies in series through laser welding, and conducting strips are fixedly connected in the compartment body. The conductive sheet is electrically connected with one side of the positive and negative nickel sheet, a protection circuit assembly is installed in the bin body, and the surface of the protection circuit assembly is electrically connected with a USB female seat. The problems that a plurality of batteries are complex in internal structure and inconvenient to inspect and assemble, the batteries are arranged in a single-layer mode in parallel, the structure cost is high, the size is large, the production and assembly difficulty is high, the ultrasonic sealing effect is poor due to limitation of the shape of a shell, and the batteries are difficult to use outdoors, dusty deserts and underwater are solved.

The utility model provides a centralized battery energy storage liquid cold and heat management system, which provides a centralized liquid cooling technical scheme for an energy storage power station consisting of a plurality of energy storage fields, each energy storage field comprises a plurality of battery cabins, and each battery cabin is provided with a plurality of battery packs; the centralized battery energy storage liquid cold and heat management system comprises a liquid cooling station, a primary side liquid cooling pipeline, CDU cabinets and a secondary side liquid cooling pipeline, one CDU cabinet is installed in each battery cabin, the liquid cooling station is connected with the CDU cabinets through the primary side liquid cooling pipeline, a plate heat exchanger is arranged in each CDU cabinet, and the secondary side liquid cooling pipeline is connected with the corresponding CDU cabinet. And a cooling medium in the primary side liquid cooling pipeline and a cooling medium in the secondary side liquid cooling pipeline are subjected to heat exchange in the plate heat exchanger. The centralized battery energy storage liquid cooling and heating management system can meet the increase of large-scale and high-efficiency requirements of an energy storage power station, meanwhile, the occupied area is smaller, the operation energy consumption is smaller, and it can be ensured that the temperature uniformity is better when the battery works, and the whole life cycle cost is lower.

Battery protection structure of a vehicle (1), comprising: a battery pack (50) comprising several battery modules (11, 12, 13, 14) and a battery housing (20) for storing the several battery modules (11, 12, 13, 14), and a vehicle body (2) on which the battery pack (50) is mounted, characterized in that: an air inlet (21, 22) which introduces air into the interior is provided in a side end section (50A) in a predetermined direction of the battery pack (50); an inlet channel (60) which forms an inlet path (60B) for introducing air drawn in from an air inlet (60A) arranged in a side section of the vehicle body (2) to the air inlet (21, 22) on one side of the battery pack (50) in the predetermined direction; the inlet channel (60) a first inlet channel (61) extending from the side section to a central section in a vehicle width direction of the vehicle body (2), and a second inlet channel (62) which is connected to the first inlet channel (61) and supplies air taken in by the first inlet channel (61) to the interior of the battery pack (50) through the air inlet (21, 22); the second intake port (62) having a first connection section (62A) which is connected to the side end section (50A) in the predetermined direction of the battery pack (50), a second connecting section (62B) which is spaced apart from the first connecting section (62A) in the vehicle width direction and is connected to the side end section (50A) in the predetermined direction of the battery pack (50), and a curved section (62C) that connects the first connecting section (62A) and the second connecting section (62B) and is curved such that it projects in the predetermined direction in the top view; and the curved section (62C) forms a front space (S1) of the curved section, i.e. a space through which the vehicle body (2) is viewed from above, between the curved (62C) section and the side end section (50A) in the predetermined direction of the battery pack (50).

The invention relates to the technical field of solar energy, and particularly discloses a bus bar assembly method, a battery string, a battery string arrangement piece and a photovoltaic module, and the bus bar and battery string assembly method comprises the following steps: arranging a plurality of battery strings at intervals along a first direction; wherein each battery string comprises a plurality of battery pieces arranged along the second direction, and a plurality of positive electrode welding strips and a plurality of negative electrode welding strips which are arranged in a staggered manner along the first direction; the plurality of positive electrode patches are correspondingly pasted on the positive electrode welding strip one by one, and positive electrode pasting gaps are reserved in the positive electrode patches at the joints with the bus bars; the plurality of positive electrode pasting gaps are arranged at intervals along a first direction; the plurality of negative electrode patches are attached to the negative electrode welding strip in a one-to-one correspondence manner; bus bars are arranged in an extending mode in the first direction and placed on the battery pieces, and the bus bars are electrically connected with the positive electrode welding strips through the positive electrode pasting notches; and the fixed sticking pieces are stuck on the bus bars and the battery pieces. The method solves the problem of subfissure of the battery piece, and improves the rate of finished products.

A lightweight back battery box belongs to the technical field of power battery assembly and comprises a frame main body, a plurality of battery fixing frames are uniformly arranged in the frame main body at intervals, each battery fixing frame comprises two L-shaped plates, the two L-shaped plates are symmetrically arranged on the two sides in the frame main body, a sealing plate is arranged on the periphery of the frame main body, and the sealing plates are arranged on the periphery of the frame main body. A connecting frame is arranged on the bottom side of the frame body, and the frame body is fixed to a vehicle longitudinal beam through the connecting frame. The light-weight back battery box disclosed by the utility model is reasonable in design and simple in structure, the types of parts are simplified through the design of the L-shaped plates, the weight is light, the assembly is convenient, and the light weight of the back battery box is realized; meanwhile, through the cooperation between the frame main body and the battery fixing frame and the cooperation between the frame main body and the connecting frame, the structural strength of the battery box is greatly improved.

The invention discloses an energy storage battery system and a control method thereof, the energy storage battery system comprises a battery cabinet, a plurality of battery packs, a water supply mechanism and a monitoring mechanism, the battery cabinet comprises a cabinet body; each battery pack is arranged in the cabinet body and comprises a shell, a plurality of battery cells, a detector, a controllable nozzle, a pressure release valve and a plurality of liquid cooling plates; the water supply mechanism comprises a water tank and a water pump; the monitoring mechanism comprises an environment monitoring part and a query part. The detector in the battery pack can monitor the state of the battery cell in real time, and once thermal runaway occurs, the controllable nozzle can quickly spray water to cool and extinguish fire, so that the thermal runaway condition is effectively prevented from spreading to the surrounding battery pack, the possibility of occurrence of serious accidents such as explosion and combustion is reduced, and the safety of personnel and property is guaranteed. Through a circulating liquid cooling heat dissipation system composed of the liquid cooling plate and the water pump, heat generated by the battery cell can be continuously and effectively absorbed, the temperature of the battery cell is controlled within a preset range, and the normal working performance and the service life of the battery cell are guaranteed.

The invention relates to a powder bridge valve metering device for dry battery electrode manufacturing. A powder dispensing device is described having an elongate wedge-shaped hopper that includes one or more fluidization plates. A powder dispensing device may be positioned over a pair of calender rolls to dispense powder, such as dry electrode material, onto the calender rolls. Such fluidizing wedge hoppers advantageously allow for precise and / or controlled distribution of powder over or substantially over the length of the calender roll.

This invention discloses a square carbon-zinc battery, comprising an insulating outer shell with a cover at its upper end. The inner surface of the insulating shell is divided into several battery compartments by partitions, each containing a dry cell battery. From left to right, the negative electrode of one dry cell battery is connected to the positive electrode of the next dry cell battery via a connecting piece. The negative electrode casing of the dry cell battery is exposed. One end of the connecting piece is connected to the positive electrode, and the other end bypasses the partition and inserts between the adjacent dry cell battery and the inner wall of its corresponding battery compartment, connecting to the side wall of the negative electrode casing of that dry cell battery. The height of the partition is higher than the height of the side wall of the dry cell battery. The lower end of the negative electrode is located at the bottom of the rightmost dry cell battery. The connecting piece is far from the negative electrode of the previous dry cell battery, preventing contact. Therefore, the structure of the square carbon-zinc battery is optimized, and the battery life is improved.

The application discloses a multi-compatibility intelligent USB power supply imitation dry battery power conversion device, which comprises a USB power supply input module for connecting with 5V power supply voltage of an external USB power supply; an intelligent voltage conversion and management module electrically connected with the USB power supply input module and used for converting the 5V power supply voltage into 3V direct current output voltage; a battery electrode output module electrically connected with an output end of the intelligent voltage conversion and management module and used for conducting the 3V direct current output voltage to a battery compartment of an external power consumption equipment; and a working state indication module electrically connected with the intelligent voltage conversion and management module and used for directly displaying the working state of the current device to a user, including a power-on state and a fault protection state. The application adopts a synchronous rectification step-down type DC-DC chip to cooperate with current detection and an electronic switch, realizes accurate and stable voltage conversion from 5V to 3V, has an automatic sleep function under no load, and solves the problems of unstable direct power supply voltage and excessively high power consumption of the USB power supply.

The invention discloses a sodium supplementing method of a sodium-ion battery and application of the sodium supplementing method, and belongs to the technical field of sodium-ion batteries. The sodium supplementing method of the sodium ion battery comprises the following steps: adding a sodium supplementing agent into negative electrode slurry to prepare a negative electrode plate; the negative plate is used for assembling a dry battery, and sodium supplementation of the sodium ion battery is completed through baking, liquid injection, positive and negative electrode reverse charging, formation, aging and capacity grading. According to the invention, a mode of combining negative electrode sodium supplement and reverse charging is adopted, a proper sodium supplement agent is introduced into the negative electrode slurry, and then the sodium supplement agent can be fully decomposed and released through reverse charging, so that the number of freely shuttling sodium ions in the sodium-ion battery is increased, the battery capacity is improved, and finally the energy density of the battery is improved; the steps are simple, meanwhile, the problem of dead quality caused by sodium supplement residues in an existing sodium supplement technology is solved, the process compatibility is good, and industrial application can be achieved.

The invention is applicable to the field of photovoltaic technology, and provides a battery assembly and a photovoltaic system, the battery assembly comprises a front adhesive film, a rear adhesive film and a battery string; the battery string comprises a plurality of battery pieces which are arranged in an overlapped mode in the first direction, each battery piece comprises a first edge and a second edge which are opposite, and the backlight face of the first edge of one battery piece is in lap joint with the light facing face of the second edge of the adjacent battery piece. The rear adhesive film is arranged on the backlight surface of the battery piece, the front adhesive film is arranged on the light facing surface of the battery piece, and the first edge of the battery piece warps towards the front adhesive film. And the welding quality is improved, so that the overall performance of the battery assembly is improved, and meanwhile, the light receiving area is increased.

The utility model provides a battery box for an electric vehicle, which comprises a box body with a top opening, a connecting bottom plate arranged at the bottom of an inner cavity of the box body, a plurality of connecting sockets arranged on the connecting bottom plate, a plurality of batteries arranged in the box body, connecting plugs arranged at the bottoms of the batteries and corresponding to the connecting sockets, and the connecting plugs are inserted into the connecting sockets. The top of the box body is provided with a wire outlet, the end of the wire extends out of the wire outlet and is connected with a motor of the electric vehicle, the top of the box body is further provided with a pressing rod, the bottom of the pressing rod is provided with a pressing block in a clamped mode, the bottom of the pressing block makes contact with the top of the battery, and the pressing block is made of elastic materials. According to the battery box for the electric vehicle, the connection of the battery and the connection socket is integrated in the box body, so that the connection plug can be conveniently aligned with the connection socket, the tight connection is ensured, and the normal operation of the electric vehicle is ensured; the pressing block prevents the battery from moving up and down, connection disconnection is prevented, and the elastic pressing block prevents the battery from being damaged due to extrusion on the battery when the pressing rod is pressed downwards.

The utility model provides an energy storage box and an energy storage device. The energy storage box comprises a box body; the battery module is arranged in the box body, the battery module comprises a plurality of battery modules, the plurality of battery modules are stacked along the longitudinal direction and are connected in series, the battery module comprises a plurality of rows of battery cells, the battery cells in each row are connected in parallel, and the battery cells in adjacent rows are connected in series; the busbars comprise a positive busbar and a negative busbar which are electrically connected with the battery cells respectively; a sealing cover covers the busbars and the battery modules; the internal cooling system is arranged in the box body, the internal cooling system comprises oil pumping equipment, and the oil pumping equipment communicates with the sealing cover and is used for pumping cooling oil into the sealing cover; the wiring port box is arranged in the box body, the wiring port box is located on the side, close to the busbar, of the sealing cover, and a wiring terminal electrically connected with the busbar is arranged in the wiring port box.The battery module is used for replacing the battery cluster and the battery modules to be stacked in the longitudinal direction, so that the box body can contain more layers of battery modules in the longitudinal direction.

This application discloses a battery string and its fabrication method, as well as a photovoltaic module. The fabrication method of the battery string includes the following steps: providing a plurality of battery cells, electrical connectors, and a protective layer; wherein adjacent battery cells are partially overlapped, each battery cell includes a current collecting layer, the electrical connectors are connected to the current collecting layers of the battery cells, and the electrical connectors have a designated area to be broken by a laser; the protective layer is disposed between the battery cells and the electrical connectors, and the protective layer corresponds to the designated area; the laser is applied to the designated area to break the electrical connector; wherein the protective layer includes a film layer with an absorbance greater than or equal to 50%, and / or a film layer with a reflectance greater than or equal to 65%; when the laser is an infrared laser, the protective layer includes a film layer with an absorbance greater than or equal to 50% and a film layer with a reflectance greater than or equal to 65%. This application can effectively enhance the protection effect of the battery cells when the laser breaks the electrical connectors, reducing the possibility of battery cell damage or breakage.

The utility model discloses a photovoltaic assembly with reflective bus bars, which belongs to the field of photovoltaic technology and comprises a plurality of bus bars and a plurality of battery pieces, and the plurality of bus bars and the battery pieces are electrically connected with each other and packaged between a front cover plate and a rear cover plate. The light receiving surface of the bus bar is coated with an adhesive, the surface of the adhesive is uneven, and a plurality of reflective metal particles are fixedly connected through the adhesive. According to the utility model, the light-receiving surface of the bus bar is coated with the adhesive and fixedly connected with the reflective metal particles to form the concave-convex reflective structure, so that compared with the existing embossed V-shaped groove scheme, the bus bar has the advantages that the conductive sectional area is prevented from being damaged by embossing, and the current-carrying capability is ensured; thick adhesive film filling is not needed, and the packaging cost is reduced; the concave-convex structure is combined with the reflective particles through the adhesive, thereby enhancing the diffuse reflection of sunlight, improving the light receiving ratio of the cell, improving the power of the assembly, and avoiding the risk of assembly failure caused by the direct contact between the bus bar and the glass.

To provide a kerosene pump unit that incorporates a secondary battery, mainly a lithium ion battery, and is equipped with a detachable light attachment. [Solution] The kerosene pump unit A comprises a pump body and a light attachment detachable from the pump body, the pump body having a built-in electric pump, the light attachment having a built-in light source, a secondary battery, and a control circuit, the control circuit controlling the charging and discharging of the secondary battery and the drive circuit that drives the electric pump and the light source, the drive circuit being built into either the pump body or the light attachment, the kerosene pump body not operating on its own but only operating when assembled and connected to the light attachment. By assembling and connecting the kerosene pump unit A, which is configured to enable refueling, it eliminates the need for troublesome dry cell battery replacement, has a lighting function, and improves battery life and ease of use.