33results about How to "Ensure insulation safety" patented technology

The invention discloses a working robot system and method for live line maintaining of a transformer substation. The system comprises a robot body, a live line working tool, a remote control terminal,and a moving and carrying vehicle for conveying the robot body, wherein the robot body comprises a moving chassis, and an insulating lifting arm which is arranged on the moving chassis; a small fly jib is connected to the front end of the insulating lifting arm; a hotline working platform for positioning the hotline working tool is arranged at the front end of the small fly jib; the small fly jibis connected to the hotline working tool through a rapid connecting device; the electric working tool comprises a foreign matter cleaning tool, a conductor repairing tool, an insulator sweeping tooland / or a dry ice washing tool. The system has the beneficial effects that a multi-sensor information fusion technology is adopted; various types of sensors are mounted on the robot and used for sensing the robot body and the information of surrounding environment, so that the operation safety and reliability of the robot can be improved.

The invention discloses a charged maintenance operation robot for transformer substation equipment. The charged maintenance operation robot includes a robot body; the robot body comprises a moving chassis and an insulating lifting arm arranged on the moving chassis; a small flying arm is connected to the front end of the insulating lifting arm, a charged operating platform used for storing a charged operating tool is arranged at the front end of the small flying arm, and the small flying arm is connected with the charged operating tool through a fast connecting device; and the charged operating tool includes a foreign body cleaning tool, a wire repairing tool, and an insulator cleaning tool. The charged maintenance operation robot has the beneficial effects that a multi-sensor informationfusion technology is adopted, various sensors installed on the robot are used to sense the information of the robot body and the surrounding environment, and the safety and reliability of the robot operation are improved.

The invention discloses a linear power machine and a power tool. The linear power machine enables the stator component to be installed on the first end and the second end. The mover component is guided and supported by the first end and the second end. No extra guide rail or guide structure is needed to be matched with the mover component. The whole structure is simplified, the size chain of the motor is reduced, the problem that the rotor component and the stator component are damaged by collision due to tolerance is avoided, the requirement for the precision of the components is lowered accordingly, the manufacturing difficulty is lowered, the precision of the motor is improved, and under the condition of the same size, the driving force of the scheme is larger, and the effect is better.Meanwhile, the stator component is partially exposed, heat exchange with external air can be effectively carried out through the exposed area of the stator component to achieve heat dissipation, andthe heat dissipation efficiency is improved.

The invention discloses a battery pack which comprises multiple overlapped battery monomers, wherein the battery monomers are connected in series. The battery pack further comprises a tab connection device and is characterized in that the tab connection device comprises an insulating connection plate and multiple conductive connection columns, wherein the insulating connection plate comprises multiple grooves; the grooves are formed in the side, back to the battery monomers, of the insulating connection plate; to-be-connected positive and negative tabs of adjacent two battery monomers of the multiple overlapped battery monomers pass through the insulating connection plate respectively and are bent into the same groove and mutually overlapped in the groove; the conductive connection columns are inserted into the groove to fixedly connect the overlapped parts of the positive and negative tabs.

The invention discloses a leakage monitoring and protection device for a generator casing, and a using method thereof, comprising a leakage detecting device, an insulation resistance measuring mechanism, an insulation resistance comparing mechanism, a control mechanism, an alarm device, and a moisture removing mechanism, wherein the leakage detecting device is connected with the generator casing,the insulation resistance measuring mechanism is connected with the insulation resistance comparing mechanism, the insulation resistance measuring mechanism measures the insulation resistance values between each of the generator windings and the generator casing, and the control mechanism is respectively connected with the leakage detecting device, the insulation resistance detecting mechanism, the insulation resistance comparing mechanism, the alarm mechanism, and the moisture removing mechanism. The invention is capable of detecting the leakage condition of the generator casing in real time,automatically activating the dehumidification mechanism to dehumidify when the leakage occurs, and using the short-circuit current generated in the excitation magnetic field and the stator winding ofthe generator to generate heat and dry, thereby improving the insulation resistance values between each of the windings of the generator and the generator casings, and well ensuring the insulation safety of the generator casing.

The invention relates to the technical field of through-wall conductive connecting devices, and provides a through-wall bushing. The through-wall bushing comprises a cylinder body and a central conductor, wherein one end of the central conductor is fixed together with a cylinder body end cover arranged at the corresponding end of the cylinder body, the other end of the cylinder body is fixedly connected with an elastic corrugated pipe, the elastic corrugated pipe is provided with a corrugated pipe end cover at the end away from the cylinder body, the other end of the central conductor is fixedwith the corrugated pipe end cover, and the elastic corrugated pipe provides tension for the central conductor to keep the central conductor tensioned. When the central conductor is heated to extend,the elastic corrugated pipe can drive the corrugated pipe end cover to straighten the extended central conductor, so that the sagging condition of the central conductor is improved, and the field intensity in the through-wall bushing is ensured to be uniform; moreover, two ends of the central conductor are fixedly connected with the corresponding end covers, thereby avoiding the generation of metal particles affecting the insulation due to the adoption of a sliding electric connection structure, guaranteeing the insulation safety, and enabling the through-wall bushing to be higher in reliability.

The invention discloses an insulation lifting arm system and method used for hotline maintenance work of a transformer substation. The system comprises a rotation platform, a main arm, an upper arm, an insulation telescopic arm and a small fly arm which are connected in sequence and further comprises an insulation lifting arm control system; and sensors for detecting the corners and the positionsof the main arm and the upper arm are arranged on the main arm and the upper arm, sensors used for detecting the telescopic length and the position of the insulation telescopic arm are arranged on theinsulation telescopic arm, sensors used for detecting the rotating angle and the horizontal inclination angles are arranged on the small fly arm, the insulation lifting arm control system controls the main arm, the upper arm, the insulation telescopic arm and the small fly arm to move according to data collected by the sensors, and one-key reset and leveling of the small fly arm of the insulationlifting arm system can be achieved. The system has the beneficial effects that the multi-sensor information fusing technology is adopted, the multiple types of sensors mounted on a robot are used, information of the robot body and the surrounding can be perceived, and operation safety and reliability of the robot can be improved.

The invention discloses an insulation detection device of a DC charging and swapping station. The device is characterized by comprising an upper balancing branch and a lower balancing branch which are sequentially connected in series between an anode busbar and a cathode busbar of a DC system of the charging and swapping station; an upper unbalancing branch and a lower unbalancing branch are respectively correspondingly connected in parallel to the upper balancing branch and the lower balancing branch; corresponding balancing circuits or unbalancing circuits are connected in series to the upper balancing branch, the lower balancing branch, the upper unbalancing branch and the lower unbalancing branch; a corresponding control switch is connected in series to each branch; a connecting point between the upper balancing branch and the lower balancing branch is connected to the ground. The device also comprises a data detecting treating unit for detecting the voltage of the anode busbar and the cathode busbar to ground. According to the insulation detection device of the DC charging and swapping station, the method of mutually switching the balancing circuits and the unbalancing circuits is carried out, the detection device is connected to the DC system to monitor, and thereby the insulation current leakage can be detected, and as a result, the system safety is ensured, the risk of people suffering from an electric shock is prevented, and the system failure probability is reduced.

The invention discloses a stimulation coil of a magnetic shock therapy device. Firstly, specifically for application characteristics of the magnetic shock therapy device, the coil is designed completely, multi-strand oxygen-free fine copper wires are utilized, the effective conductive area is increased, coil and cable impedance and heat loss are reduced, coil heating is reduced, efficiency is improved, a Teflon tube is wrapped inside the wires of the stimulation coil, the heat radiation fluid is isolated from the wires, and the stimulation coil is easy for safe liquid cooling. The stimulationcoil is advantaged in that the cap-shaped coil fitting the shape of a human head is utilized, the stimulated head is wrapped by magnetic lines generated through magnetic stimulation, and the distancebetween the coil and the scalp is minimized; a magnetic material with high magnetic permeability, such as a silicon steel sheet, an amorphous material, high-conducting ferrite, etc., is embedded or covers around the stimulation coil, when the inductance of the stimulation coil is the same, the high magnetic permeability material is increased, the number of stimulation coil turns can be reduced, the length of the stimulation coil and copper loss of the wires are reduced, and the surrounding magnetic field can be made to return back to the head more along the magnetic permeability material to enter the cerebral cortex of the stimulated site.

The invention discloses an insulating device and a battery module output device with the same. The insulating device is located at the end part of a copper bar between adjacent battery modules, and comprises a base and an insulating cover, wherein the base is used for being fixedly connected with one battery module; and the insulating cover is detachably connected with the base and is provided with an insulating body which is used for covering a copper bar connection structure. After the battery modules, the copper bar and the insulating device are arranged, no high-voltage exposure can be ensured; the insulating safety is ensured; and reliable connection of the connection structure between the battery modules is ensured. Furthermore, the insulating cover is detachably connected with the base, so that the disassembly and assembly convenience between the battery modules can be ensured.

The invention discloses a busbar structure and a cell module. The busbar structure comprises: a positive output pole; a negative output pole; a positive output pole busbar connected with the positiveoutput pole; a negative pole busbar connected with the negative output pole; and a plurality of intermediate busbars having a cell anode connection portion and a cell cathode connection portion, wherein the cell anode connection portion of the first intermediate busbar and the positive output pole busbar are insulated from each other and are distributed in a stack mode, and the cell cathode connection portion of the last intermediate busbar and the negative pole busbar are insulated from each other and are distributed in a stack mode. The cell module comprises a module holding member providedwith a cell matching structure; the cell array comprises a plurality of monomer cells which have cathodes facing the module holding member and are matched with the cell matching structure. The busbarstructure is arranged on the module holding member, the monomer cells of the cell array are connected through the busbar structure to form the cell module. The product process can be effectively simplified, the production process is reduced, and the production cost is saved.

The invention provides a novel damping type anti-vibration device comprising a steel wire cable, a hanger spring shock absorber and a gravity concrete foundation, wherein one end of the hanger springshock absorber is installed on the gravity concrete foundation, and the other end of the hanger spring shock absorber is installed at a lowest sag point of the sag of a conductive wire or fixed to a frame of a spacing bar on the conductive wire through the steel wire cable. According to the novel damping type anti-vibration device, the vibration of the conductive wire can be effectively prevented,especially the up and down vibration of the conductive wire can be suppressed, and the device has a simple structure and is suitable for a variety of conductive wires with different split numbers.

The invention discloses a three-level circuit silicon carbide power module, and belongs to the technical field of power electronics. The power module comprises: a bottom layer direct copper-clad ceramic DBC substrate; and silicon carbide power chips, a driving resistor, a power terminal and a driving terminal which are welded on the bottom layer DBC substrate. Thesilicon carbide power chip and the driving resistorform a three-level full-bridge circuit; the silicon carbide power chips are connected through metal bonding wires; and the bottom layer directcopper-coated ceramic DBC substrate is welded to a bottom plate. According to the power module provided by the invention, through reasonable DBC copper layer layout, a current conversion loop is optimized, the balance of a parallel chip loop is realized, the parasitic inductance of the loop is greatly reduced, the size of the module is reduced, and the power density of the module is improved.

The invention discloses a buck circuit silicon carbide power module, and belongs to the technical field of power electronics. The power module comprises a bottom-layer direct bonded copper DBC substrate, and silicon carbide power chips, a driving resistor, power terminals and driving terminals which are mounted on the bottom-layer DBC substrate. The silicon carbide power chips and the driving resistors form two buck half-bridge circuits. The silicon carbide power chips are connected through metal bonding wires. The bottom-layer DBC substrate is welded on a bottom plate. According to the power module provided by the invention, through reasonable DBC copper layer layout, a current conversion loop is optimized, the balance of a parallel chip loop is realized, the parasitic inductance of the loop is greatly reduced, the size of the module is reduced, and the power density of the module is improved.

The invention discloses a magnetic confinement equilibrium bed inductor which comprises a housing and groups of concentric circular winding coils arranged in the housing, wherein a cooling fin is arranged out of the housing, high heat conductivity insulating rubber slabs are arranged between the winding coils and the housing, high heat conductivity insulating paint is filled between the winding coils and the housing, and the housing, the winding coils and the high heat conductivity insulating rubber slabs are cured together. Due to the winding coils in concentric circular structures, a magnetic field can be conveniently adjusted by adjusting the number of turns and current of each winding coil, so that the intensity of the magnetic field formed in the center by the outer coil and the inner coil is kept consistent. The coils, the high heat conductivity insulating rubber slabs and the housing are cured together by using the high heat conductivity insulating paint, so that the inductor is stable and reliable. Moreover, the heat transfer efficiency is further improved. The high heat conductivity insulating paint, the high heat conductivity insulating rubber slabs and the cooling pin interact with one another and are synergically matched, so that the radiating effect of the inductor is greatly improved, the operating cost is lowered, and the service life of the equipment is prolonged.

The invention discloses a grounding method of a primary coil N end of a relatively semi-insulating electromagnetic voltage transformer and an iron core. An outgoing line of the primary coil N end is connected with the iron core inside a casting body, and the N end is then led out of the iron core and subjected to operational grounding with a connecting sheet. In the method, when the product does not operate, neither of the N end and the iron core is grounded; and when the product operates, the N end and the iron core are grounded simultaneously, and the iron core is connected with an insert of an installation base plate. When malfunction occurs, the electric potential of the iron core and the N end which are connected together is the same, electric potential difference does not exist at the grounding point inside the casting body, the product can not be damaged, and the insulation safety performance and normal use of the transformer are ensured.

The invention relates to a self-cutting circuit method for abnormal heat generation of connectors, which comprises an insulating casing of a connector for power wires, and metal connectors and plugs electrically connected with the power wires are fixedly connected in the insulating casing. There is a normally open thermal switch on the edge of the metal connector and the plug-in. One end of the thermal switch passes through a current limiting resistor, and a current drain diode can be connected in series to connect to the phase line of the power supply, and the other end is grounded. A leakage protector is installed to control the line. In this way, if the electrical contact of the plug and socket is poor, the contact resistance will increase, resulting in heating at the contact point. , causing a small part of the current to flow into the ground wire through the current limiting resistor, so that the current value of the incoming and outgoing lines in the leakage protector controlling the line is out of balance, the leakage protector will trip, the power supply will be disconnected, and the line will stop supplying power to the electrical appliances , so as to prevent the occurrence of electric fire.

The invention discloses a magnetic confinement equilibrium bed inductor which comprises a housing and groups of concentric circular winding coils arranged in the housing, wherein a cooling fin is arranged out of the housing, high heat conductivity insulating rubber slabs are arranged between the winding coils and the housing, high heat conductivity insulating paint is filled between the winding coils and the housing, and the housing, the winding coils and the high heat conductivity insulating rubber slabs are cured together. Due to the winding coils in concentric circular structures, a magnetic field can be conveniently adjusted by adjusting the number of turns and current of each winding coil, so that the intensity of the magnetic field formed in the center by the outer coil and the inner coil is kept consistent. The coils, the high heat conductivity insulating rubber slabs and the housing are cured together by using the high heat conductivity insulating paint, so that the inductor is stable and reliable. Moreover, the heat transfer efficiency is further improved. The high heat conductivity insulating paint, the high heat conductivity insulating rubber slabs and the cooling pin interact with one another and are synergically matched, so that the radiating effect of the inductor is greatly improved, the operating cost is lowered, and the service life of the equipment is prolonged.

The invention provides an intelligent environment regulation and control device which comprises a shell, a purification device, an exhaust fan, a main control module and a dehumidification device, theshell is square and is a stainless steel shell, a hat brim is arranged at the upper end of the shell, an air suction hole is formed in the lower portion of the hat brim, and the air suction hole keeps away from the four corners and the edge of the hat brim; the purification device includes a dust-proof filter element arranged in the shell, and the dehumidification device is electrically connectedwith the main control module and is a drainage type dehumidifier, so that rainwater can be prevented from entering the shell through the hat brim, the air suction holes are formed in the lower portion of the hat brim, air can enter the shell conveniently to circulate the interior of the shell, dehumidification is facilitated, and meanwhile the air suction holes are formed away from the four corners and the edge of the hat brim to prevent the rainwater from entering the shell along the hat brim. And the purification device comprises a dustproof filter element arranged in the shell, and the dehumidification device is electrically connected with the main control module, so that external dust or impurities can be well prevented from entering the shell, water vapor can be prevented from entering the shell, the dehumidifying device is convenient to control, and the dehumidifying effect is guaranteed.

The invention discloses an insulation lifting arm system and method used for hotline maintenance work of a transformer substation. The system comprises a rotation platform, a main arm, an upper arm, an insulation telescopic arm and a small fly arm which are connected in sequence and further comprises an insulation lifting arm control system; and sensors for detecting the corners and the positionsof the main arm and the upper arm are arranged on the main arm and the upper arm, sensors used for detecting the telescopic length and the position of the insulation telescopic arm are arranged on theinsulation telescopic arm, sensors used for detecting the rotating angle and the horizontal inclination angles are arranged on the small fly arm, the insulation lifting arm control system controls the main arm, the upper arm, the insulation telescopic arm and the small fly arm to move according to data collected by the sensors, and one-key reset and leveling of the small fly arm of the insulationlifting arm system can be achieved. The system has the beneficial effects that the multi-sensor information fusing technology is adopted, the multiple types of sensors mounted on a robot are used, information of the robot body and the surrounding can be perceived, and operation safety and reliability of the robot can be improved.

The invention discloses a hot-line maintenance autonomous working robot platform for a transformer substation. The hot-line maintenance autonomous working robot platform comprises a robot body, a hot-line operation tool, a remote terminal and a mobile transport vehicle for transporting the robot body, wherein the robot body comprises a mobile chassis and an insulating lifting arm arranged on the mobile chassis; a small fly jib is connected to the front end of the insulating lifting arm; a hot-line operation platform for placing the hot-line operation tool is arranged at the front end of the small fly jib; the small fly jib is connected to the hot-line operation tool through a quick connecting device; and the hot-line operation tool comprises a foreign matter cleaning tool, a wire repair tool, an insulator sub-cleaning tool and / or a dry ice cleaning tool. The hot-line maintenance autonomous working robot platform has the following beneficial effects: the multi-sensor information fusiontechnology is adopted, and various sensors mounted on a robot are utilized to sense information of the robot body and the ambient environment, so that the operation security and reliability of the robot are improved.

The invention discloses a power transformer flexible opening and network disconnection auxiliary device which comprises an auxiliary transformer, a second circuit breaker, a first switch and a three-phase short-circuit bar. When the power transformer is in no-load opening and network disconnection, the auxiliary transformer has certain short-circuit impedance, so that the short-circuit impedance of the auxiliary device becomes a small load of the power transformer; and an exciting current follow current loop is provided for the power transformer, so that operation overvoltage caused by no-load network disconnection of the power transformer is reduced, and flexible opening network disconnection is realized. The device ensures the local power grid stability and the device insulation safety.

The invention discloses a fuel cell thermal management system and a control method thereof, and belongs to the field of fuel cells. The thermal management system of the fuel cell comprises an electric pile, a thermostat, a heat dissipation part, a water pump, a water tank, a deionization tank and a normally open solenoid valve; the thermal management system of the fuel cell forms a loop L1 and a loop L3, and the loop L1 comprises the thermostat and the water pump; the L3 loop comprises a normally-open solenoid valve, a deionization tank and a water tank, an inlet of the water tank is connected with an inlet of the water pump, the deionization tank is connected between the water tank and the normally-open solenoid valve, and an outlet of the normally-open solenoid valve is connected with an outlet of the heat dissipation component. Due to the fact that the L3 loop and the L2 loop are connected in parallel in the starting process, the heat capacity is large, the warm-up time is long, and even cold starting fails, a normally-open electromagnetic valve is additionally arranged on the L3 loop, and the dynamic characteristic of the system can be improved by closing the L3 loop in the starting process. And in the conventional operation, the functions of reducing the conductivity, supplementing liquid and exhausting gas can be met by keeping the normally open solenoid valve open.

A battery pack includes a plurality of battery cells stacked on each other, and the plurality of battery cells are connected in series. The battery pack further includes a tab connection device, characterized in that the tab connection device includes an insulating connecting plate and a plurality of battery cells. a conductive connecting post; the insulating connecting plate includes a plurality of grooves; the plurality of grooves are disposed on a side of the insulating connecting plate facing away from the plurality of battery cells; the plurality of overlapping battery cells are arranged relative to each other. The positive and negative electrode lugs of two adjacent battery cells that need to be connected pass through the insulating connecting plate and are bent and placed in the same groove, and overlap each other in the groove. The conductive connecting post is inserted into the groove. , firmly connect the overlapping portions of the positive and negative tabs.

The invention discloses a liquid cooling system for a high-power charging connector, and the system comprises a non-conductive liquid material box which comprises a first cavity and a second cavity which are communicated with each other, the first cavity is disposed above the second cavity to form a sealed box body, the cross section of the first cavity is larger than the cross section of the second cavity, and the first cavity is provided with a liquid inlet and a liquid outlet; the system also comprises a radiator and a cooling pump, a pipeline at one end of the radiator is inserted into a preset first distance from the top of the first cavity through the liquid inlet; a pipeline at one end of the cooling pump is connected with the other end of the radiator, a to-be-cooled cable and an interface terminal of the charging connector are immersed in a pipeline at the other end of the cooling pump, and the pipeline at the other end of the cooling pump is inserted into a preset second distance from the top of the first cavity through the liquid outlet; the bottom of the second cavity is provided with a discharge port, the discharge port is provided with a discharge valve, and the discharge valve is used for discharging metal impurities worn by the cable to be cooled. The risks that the insulation resistance of the liquid cooling oil becomes small and insulation fails after long-term use can be reduced.

The invention relates to a safe and efficient motor. The safe and efficient motor comprises a motor shell (1) and a supporting foot (2), wherein radiating fins (3) are arranged on the periphery of the motor shell (1), and the radiating fins (3) are of parallel stripe structures; hanging rings (4) are arranged at the middle positions in the axial direction of the motor shell (1), and the hanging rings (4) are uniformly arranged on the circumference of the motor shell (1); a winding stator conjugated plate (9) is fixed on the inner wall of the motor shell (1), a stator core (10) is fixed at the middle part of the winding stator conjugated plate (9), winding grooves (6) are formed in the periphery of the stator core (10), and a heat conduction insulating elastic rubber fixing block (8) is arranged between every two adjacent winding grooves (6). According to the efficient motor disclosed by the invention, due to the fact that the heat conduction insulating blocks are arranged among the winding grooves, the heat of components with maximum heat production can be effectively conducted to the motor shell as much as possible, the heat is quickly radiated through the radiating fins of the motor shell, the heat accumulation is reduced, and the service life of the motor is prolonged.

The invention relates to the technical field of wall-penetrating conductive connection devices, and provides a wall-penetrating bushing. The wall-piercing bushing includes a cylinder and a central conductor, and one end of the central conductor is fixed together with a cylinder end cover provided at the corresponding end of the cylinder. , the other end of the cylinder is fixedly connected with an elastic bellows, the end of the elastic bellows away from the cylinder is provided with a bellows end cover, the other end of the central conductor is fixed with the bellows end cover, and the elastic bellows provides the central conductor with tension force while maintaining tension in the center conductor. When the central conductor is heated and elongated, the elastic corrugated tube can drive the end cover of the corrugated tube to straighten the extended central conductor, improve the sagging of the central conductor, and ensure uniform field strength in the wall bushing; and both ends of the central conductor are aligned with the corresponding The end cover is fixedly connected to avoid metal particles that affect the insulation due to the structure of the sliding electrical connection, which ensures the safety of the insulation and makes the wall bushing have high reliability.

Disclosed herein are a substation live-line maintenance robot system and method, comprising: a robot body, a live-line operation tool, a remote control terminal, and a moving transport vehicle configured to transport the robot body; the robot body comprises: a mobile chassis and an insulated lifting arm that is disposed on the mobile chassis, a front end of the insulated lifting arm being provided with a small fly jib, a front end of the small fly jib being provided with a live-line operation platform configured to place the live-line operation tool, and the small fly jib being connected to the live-line operation tool; the live-line operation tool comprises: at least one from among a foreign article cleaning tool, a wire repair tool, an insulator cleaning tool, and a dry ice cleaning tool.

The invention relates to the technical field of automotive power battery packs, and provides a battery pack based on a tubular battery unit. The battery pack comprises a positive electrode terminal, anegative electrode terminal and a plurality of battery packs, the battery packs are stacked in ranks, the same columns of the battery packs are synchronously connected in parallel, and adjacent columns of the battery packs are connected in series in order. Each battery pack concretely comprises a tubular column body and a plurality of battery cells, the battery cells are connected in series in order, and the tubular column bodies sleeve the outer portions of the battery cells to fix the serially connected battery cells. Besides, the parallel connection of the same columns of the battery packsis achieved through first end face fixing parts, the serial connection of the adjacent columns of the battery packs is achieved and the parallel connection of the same columns of the battery packs isachieved through second end face fixing parts so as to have a fixing effect on the battery packs. The battery pack based on the tubular battery unit is high in structural strength, good in rigidity,obvious in heat dissipation effect and good in safety performance, can be assembled to battery packs with different voltage grades and power as required, and is high in versatility.