85results about How to "No deformation" patented technology

The utility model relates to the field of building construction discloses a new pipe clamp for ALC partition wallboard fixing, including sleeve pipe, movable pipe, baffle, spring and fixed block, the top welding of sleeve pipe has the limit end plate, and the limit end plate is opened with the guide groove, movable pipe is established in the sleeve pipe, and the cross section of its near top one end is established as with the contour of guide groove matching structure, the top of movable pipe still is equipped with the connecting head connected with one end of fixed block, and the interval between the bottom surface of fixed block and the end surface of movable pipe is not less than the thickness of limit end plate, and the connecting head can pass through the guide groove and enter the sleeve pipe, the baffle is screwed in the bottom inner wall of sleeve pipe, the spring is established in the sleeve pipe, and one end of spring abuts against the baffle, and the other end abuts against movable pipe. The utility model does not need the construction personnel to press the fixed block tightly on the beam bottom or the floor, and the operation is labor saving, simultaneously, the fixed block can not take place deformation, can improve the fixed effect of pipe clamp.

The utility model provides a kind of special anti-toppling jig for grab assembly, it is related to the assembly auxiliary equipment field of grab production and manufacture, it includes bottom support, two vertical supports are fixed on the bottom support, two the vertical support is spaced and parallelly arranged along the length direction of bottom support, and all vertical to the plane where bottom support is, the lower end of vertical support is fixedly connected with bottom support by welding mode, the upper end of vertical support is provided with circular slot, the radian of circular slot is compatible with the radian of outer circumferential surface of grab middle beam shaft, the utility model solves the technical problem that operating personnel in the middle beam bottom operating surface faces high-altitude falling risk when grab assembly in prior art, operation space is small, leading to big operation difficulty and welding fume is difficult to diffuse and harm health.

A device for measuring in-situ drilling rock hardness based on a high-pressure water pressure head comprises a hydraulic power system, a data acquisition system, a test probe and a push rod, the front end of the push rod is connected with the rear end of the test probe; the hydraulic power system comprises a manual hydraulic plunger pump; the manual hydraulic plunger pump is connected with the test probe through a reversing three-way valve; the data acquisition system comprises a data recorder, a displacement sensor and a pressure sensor, the displacement sensor and the pressure sensor are arranged on the manual hydraulic plunger pump, and the displacement sensor and the pressure sensor are connected with the data recorder through a signal receiver. The device is simple in structure, convenient to operate and capable of measuring the rock strength of different drill holes, different depths and different point positions so as to obtain the distribution condition of the roadway rock strength, the measuring result is close to the on-site rock mass, a water medium is used for pressure transmission, the measuring process is simple, convenient, environment-friendly and safe, errors in the processes of sampling, processing and the like are avoided, and the working efficiency is improved. And the measurement cost is reduced.

The utility model discloses a kind of light-weight motor mounting bracket, it is related to motor bracket production appliance technical field, including installation base, installation base top one end is welded with mounting plate, mounting plate bottom side is welded with the reinforcing rib for strengthening fixed, reinforcing rib bottom is welded on installation base, mounting plate top is fixedly connected with connecting block, connecting block is opened with the fixed hole for connecting external equipment, mounting plate is opened with the heat dissipation hole for ventilation, the utility model is set through connecting block, can ensure the reliable connection of bracket and external equipment, optimize the transmission path of force, reduce stress concentration;Through the setting of expansion bolt, the quick, accurate installation of bracket can be realized, the firmness of guarantee installation;Through the setting of reinforcing rib, it can be ensured that the connecting part of mounting plate and installation base does not crack or deform when motor high-speed operation or load changes, solve the structural damage problem caused by insufficient strength of connecting part of traditional bracket.

The utility model discloses an electric servo control universal testing machine which comprises a base, a pressure detection table is arranged in the base, a supporting plate is arranged in the side direction of the base, and supporting frames are arranged at the two ends of the supporting plate. A downward pressing push plate is arranged on the inner side wall of the supporting plate, a first sliding rail and a second sliding rail are arranged on the side wall of the supporting frame from inside to outside, a first protection frame is arranged on the first sliding rail in a sliding mode, and a second protection frame is arranged on the second sliding rail in a sliding mode; the first protection frame and the second protection frame are arranged, and the sliding stroke of the second protection frame is higher than that of the first protection frame, so that scrap splashing caused by material crushing in the test process is effectively prevented. By means of the double-layer protection design, the risk of injury to surrounding equipment and workers can be greatly reduced, and the safety of the test process is improved. Splashed chippings have large kinetic energy and are prone to damaging a testing machine and other peripheral equipment.

The utility model relates to a kind of gas redistribution plate mounting structure of electric tar precipitator, including the installation shell installed on electric tar precipitator, the distribution plate is arranged in the installation shell inside, the positioning component for clamping distribution plate, locking assembly for fixing positioning component.This gas redistribution plate mounting structure of electric tar precipitator, through the orientation cooperation of positioning plate and positioning groove, positioning groove is along the initial positioning that positioning plate is released, the overall rotation clamping of inner ring, rotate inner ring can drive all hook-shaped clamping pieces synchronous clamping positioning plate, avoid the degree that each bolt is tightened cannot be unified to lead to distribution plate stress concentration, by the constant pre-tightening of spring, so that positioning column penetrates plate body, to adopt the way of bolt to fix locking assembly, avoid fixed clamping distribution plate due to locking assembly movement leading to fixed failure, and positioning plate, positioning column etc. Center symmetry, shell stress balance, no local overload leads to shell deformation or cracking.

The invention discloses a method for eliminating internal stress of a large-scale polycrystalline diamond block material. The method comprises the following steps that the block material is placed in a vacuum heat treatment furnace; carrying out vacuumizing and gas washing operation on the furnace chamber so as to remove residual active gas; introducing high-purity protective gas into the furnace and maintaining positive pressure; executing a stepped heating and heat preservation process: firstly, heating to a first heat preservation temperature T1 at a first heating rate and preserving heat, and then heating to a higher second heat preservation temperature T2 at a second heating rate and preserving heat; and after heat preservation is completed, the controlled cooling process is executed till the furnace temperature is reduced to the room temperature. A strategy of'stepped heating + long-time heat preservation 'is adopted, firstly, the stress of a part of a high-energy area is preliminarily relaxed at a low temperature T1, and cracking caused by stress concentration due to rapid heating is avoided; then, at a higher temperature T2, sufficient energy is provided for atomic diffusion and grain boundary slippage, and deep and uniform release of the internal stress is achieved. And the method is particularly suitable for large-scale blocks.

The present application relates to the technical field of turbine double-sided array blade processing of an aero-engine, and particularly relates to a turbine double-sided array blade integrated forming electrolytic machining tool and method, through the continuous feeding of the left and right tool cathodes to the direction of the part to be processed at the same time, the double-sided array blade is simultaneously machined; the machining tool comprises a cathode clamping block, a tool cathode, a sealing device and a support seat device; a plurality of electrolyte input channels are arranged on the left and right sides of the support seat, the liquid of the electrolyte input channels passes through the flow blocking cavity of the sealing device, the electrolyte is integrated and then flows into the machining area, then flows to the current collection area arranged in the cathode clamping block through the built-in plastic insulation device of the tool cathode, and finally flows out of the electrolyte output channel. Through the double-sided multi-feature integrated forming electrolytic machining technology, the machining efficiency and machining precision can be improved; the electrolyte flow channel adopting the reverse flow type flow field design can effectively improve the uniformity of the flow field.

The utility model discloses a charging pile power line connector, including shell and first electrically conductive column, first electrically conductive column is cylindrical, and the upper portion of first electrically conductive column is equipped with upper cavity, and the lower part is equipped with lower cavity, the upper end of upper cavity and the lower end of lower cavity all are equipped with the opening, and the crown spring is all equipped in upper cavity and lower cavity, be equipped with a plurality of first jack for accommodating first electrically conductive column in the shell, the top of shell is connected with the bottom of an expansion shell, and the second jack of being consistent with the first jack number is equipped in expansion shell, and the second jack is communicated with first jack one to one. Since the above technical scheme is adopted, compared with the prior art, the utility model realizes the pluggable connection between first electrically conductive column and external power line, so that the first electrically conductive column external circuit connection side will not be deformed, and the external wire and power line connector can be replaced and reused.

The utility model discloses a high load automobile part frame for assembly line production relates to the technical field of automobile production, including base, the upper end center position of base is installed with center support column, the upper end symmetry of base is installed with two side plates, and the opposite end of two side plates is provided with the sliding slot, the inside installation of sliding slot has the hydraulic pressure rod, and the upper end common mounting of two hydraulic pressure rods has the crossbeam, the both ends of crossbeam all are provided with the lateral groove, and the inside rotation of lateral groove is connected with double screw thread rod, the surface symmetry of double screw thread rod is installed with the moving plate, and the lower end common mounting of same side two moving plates has the clamping plate, and the opposite end of two clamping plates all is installed with a plurality of equidistance arrangement's clamping block. The utility model discloses through setting a series of structures, through the collaborative structure of " center support column + double hydraulic pressure rod + double screw thread rod", realizes the stable support under the big load.

The invention provides a high-strength complex-section cavity product cutting device which comprises a height adjusting mechanism, a radian adjusting mechanism, a follow-up mechanism and a cutting unit which are sequentially arranged from bottom to top. The cutting-off unit comprises a vertical cutting-off mechanism used for cutting off material belts on the two sides of the cavity product and a horizontal cutting-off mechanism used for cutting off a reinforcing rib structure in the middle of the cavity product. The invention further provides a cutting-off method which comprises the following steps: pre-punching and cutting off a process hole in advance in a material belt before rolling forming, and integrally cutting off a cavity product by adopting a regional secondary cutting-off mode after rolling forming. Follow-up continuous cutting of high-strength complex section type cavity products can be achieved on a rolling line, the cutting efficiency is high, the quality is good, the product rework rate is greatly reduced, and the service life of a cutter is remarkably prolonged; the device is flexible to use and high in universality, and can be adapted to cold-bending profiles with various different section types through replacement of the standard cutting head.

The application provides a waterproof GPS positioning structure for marine measurement and a use method thereof, and relates to the technical field of GPS positioning, and comprises a waterproof protection piece, a wireless GPS locator, a movable protection piece, an installation prompt piece and a connection stabilizing piece; the wireless GPS locator is installed inside the waterproof protection piece; the movable protection piece is installed on the waterproof protection piece; the installation prompt piece is installed at the bottom of the waterproof protection piece; and the connection stabilizing piece is installed on the installation prompt piece and used for improving the stability of the installation prompt piece after connection. The application gives priority to extrusion of external pressure to make four movable protection discs slide, so that the connection part of the waterproof protection shell a and the waterproof protection shell b basically does not deform, and the problem that the connection part on the GPS positioning structure is prone to deformation when the GPS positioning structure moves to a deep position in the ocean and cannot guarantee the original sealing effect is solved.

The application discloses a kind of strong penetration cooking-resistant type water-based textile paper tube two-component epoxy dip coating and preparation method thereof, belong to water-based paint technical field.The coating is composed of A component and B component, A component uses the composite wetting penetrant that self-emulsifying submicron water-based epoxy dispersion and sulfobutane acid dioctyl sodium salt, acetylene glycol surfactant are composed of;B component selects fast-drying water-soluble modified polyamine curing agent, adds reactive curing accelerator.By the synergy of small particle size epoxy dispersion and composite wetting penetrant, the technical problem that traditional water-based paint is poor in paper tube fiber permeability, weak adhesion is solved;At the same time, through the synergistic effect of fast-drying curing agent and accelerator, the drying time is shortened.The coating has the characteristics of low VOC content, environmental protection safety, strong penetration to paper tube substrate, fast drying speed, excellent adhesion, and the dense paint film formed after curing has the performance of saturated water vapor cooking resistance.

The application provides a wear-resistant composite piercing mill head manufacturing method and a piercing mill head, and the manufacturing method comprises the following steps: S1, preparing a steel base head; S2, adopting a submerged-arc welding process to make a flux-cored wire cladded on a working cone surface and a nose end surface of the steel base head, so as to form a cladding layer with a thickness of 6-8 mm; and S3, pre-oxidizing the cladding layer of the steel base head at high temperature, so that the wear-resistant composite piercing mill head is obtained. The wear-resistant composite piercing mill head manufacturing method has a dense and uniform oxide film on the surface of the cladding layer of the piercing mill head, the oxide film is firmly combined with the cladding layer, and the existence of the dense and uniform oxide film can reduce the power consumption of a steel pipe piercing mill and prolong the service life of the piercing mill head.

The present application relates to a kind of mobile tunnel kiln with blank system and blank method, solve the technical problem that mobile blanking machine in prior art is easy to cause brick blank deformation or collapse phenomenon when blanking the blank with high moisture content.It provides a kind of mobile tunnel kiln with blank system including mobile platform, brick blank conveying belt and blank transfer device are arranged on mobile platform, the inlet end of brick blank conveying belt is equipped with brick blank transfer machine, and brick blank transfer machine is used to move the brick blank on the brick blank conveying belt to the brick blank conveying belt, and blank transfer device is used to grab the brick blank on the brick blank conveying belt and blank it on the ring kiln bottom;Mobile platform is respectively arranged on the inside and outside of ring kiln bottom on walking support, and the up and down position of mobile platform on walking support is adjustable, and the bottom surface of mobile platform is used to keep the top surface of ring kiln bottom with set interval to enable mobile platform to cross the half blank stack of first set height on ring kiln bottom to realize partial stacking.

The utility model discloses a kind of exempt from nail paste library location box, including library location main body board, the outer surface of the library location main body board is provided with two box side plates and back plate, the box side plate, back plate and library location main body board are connected between by bottom crease, the inside of the library location main body board is provided with two partition plates, the inside of the library location main body board is provided with transverse partition plate on partition plate. In the exempt from nail paste library location box, library location main body board and box side plate, back plate are connected by bottom crease, folding is naturally formed along crease, without alignment calibration, the recess of transverse partition plate is matched with partition plate, side plug is matched with corresponding hole site, realize accurate positioning, can be completed assembly without tool, and library location box is realized self stable formation by pure physical buckle structure, and reliable stacking between unit can be realized by stacking plug and hook hole, without punching screw fixing, can realize quick formation, exempt from nail exempt from glue and fixed formation main body structure firm, beautiful.

This invention discloses a flexible perovskite solar cell and its fabrication method, relating to the field of solar cell technology. The fabrication method of a flexible perovskite solar cell includes the following steps: attaching one side of a UV-reducing double-sided adhesive tape to a rigid substrate; attaching the other side of the UV-reducing double-sided adhesive tape to a flexible substrate; performing a first laser scribing on the flexible substrate; fabricating a first charge transport layer, a perovskite layer, and a second charge transport layer on the surface of the substrate after the first laser scribing; performing a second laser scribing on the device; fabricating a metal electrode layer on the surface of the second charge transport layer; performing a third laser scribing on the device to obtain a perovskite solar cell; irradiating the perovskite solar cell with UV light; and separating the flexible substrate and the rigid substrate to obtain the flexible perovskite solar cell. This invention ensures that the flexible and rigid substrates are undamaged during the peeling process, and that no adhesive residue remains after peeling, without affecting the performance and encapsulation of the flexible device.

The application discloses a universal preparation method of morphology-controllable ordered alloy nanocrystals based on a non-equilibrium nanometallurgical strategy, which comprises the following steps: placing alloy nanocrystals or loaded alloy nanocrystals in a non-equilibrium nanometallurgical platform, heating to a holding temperature at a heating rate higher than a critical heating rate of the alloy, cooling to room temperature after isothermal holding, and obtaining morphology-controllable ordered alloy nanocrystals. The application characterizes a nanometer-scale TTT phase diagram which is different from a traditional bulk alloy, finds an unreported "atomic-level armor formation region", adjusts the temperature and heating rate of alloy nanocrystal ordering to the corresponding atomic-level armor formation region, successfully prepares morphology-controllable ordered alloy nanocrystals with different particle sizes, different geometric shapes and different chemical components, and solves the preparation problem of morphology loss in the ordering process of alloy nanocrystals at high temperature which has not been solved before. The preparation method is simple and universal, and is suitable for large-scale production.

This utility model discloses a high-temperature resistant smoke sensor, relating to the field of smoke sensor technology. A high-temperature resistant smoke sensor includes: a housing, with a smoke detection component disposed inside the housing; a top cover fixedly connected to the upper end of the housing; and an air intake grille disposed on the surface of the top cover. This invention solves the problem that traditional smoke sensors have a temperature resistance limit of only 70-90℃. When the ambient temperature rises suddenly (e.g., a kitchen oil fire can rise from room temperature to 180℃ within 30 seconds), the housing is prone to softening and deformation due to the high temperature, leading to failure of the internal chamber's seal and even short circuits. Furthermore, in industrial settings where the temperature is consistently between 80-150℃ (e.g., in metallurgical workshops and steam boiler rooms), the aging of internal components in the smoke sensor is accelerated, causing drift in the parameters of electronic components such as capacitors and resistors, a decrease in detection sensitivity of more than 50%, and a lifespan shortened to one-third of that under normal conditions. Frequent replacements not only increase costs but also create safety hazards.

The utility model relates to the technical field of building formwork supporting, and discloses an aluminum formwork supporting beam which comprises a fixed beam, the top of the outer wall of the fixed beam is fixedly connected with a bottom formwork, the bottom of the outer wall of the fixed beam is connected with a telescopic rod in a sliding mode, and the output end of a jack is fixedly connected with a fixing buckle. A first bolt is in threaded connection with one side of the inner wall of the fixing buckle, the fixing buckle is slidably connected to the middle of the inner wall of the fixing frame, a lever is rotatably connected to the right side of the outer wall of the jack, a pulley is rotatably connected to the bottom of the outer wall of the jack, and a supporting mechanism is fixedly connected to the top of the outer wall of the fixing beam. The supporting mechanism is used for fixing and supporting the aluminum formwork. According to the utility model, the fixed beam is a main bearing part of the supporting beam, the top of the fixed beam is connected with the bottom template, the fixed beam is used for bearing construction load, the height can be adjusted to adapt to different construction requirements, and deformation or instability is avoided when large load is borne.

The utility model discloses a body fixing device of an amorphous alloy three-dimensional wound core transformer, which comprises an upper fixing device and a lower fixing device, a tank cover is connected with the body of the amorphous alloy three-dimensional wound core transformer by the upper fixing device, and an oil tank is connected with the body by the lower fixing device; the upper fixing device comprises a first clamping piece, a flexible connector and a connecting bolt, the first clamping piece is arranged on the upper portion of the transformer body, the first clamping piece is connected with the tank cover through the flexible connector and the connecting bolt, the lower fixing device comprises a second clamping piece and a locking bolt, the second clamping piece is arranged on the lower portion of the transformer body, and the second clamping piece is fixed to the oil tank through the locking bolt. The first clamping piece, the second clamping piece and the middle connecting piece of the transformer body are matched with one another to clamp a coil of the transformer body and fix an iron core of the transformer body. Through the reasonable design of the upper fixing device and the lower fixing device, a protector body can be effectively fixed, the operation stability of the transformer is improved, and the service life of the transformer is prolonged.

The utility model relates to the technical field of box girder reinforcement, and discloses an external prestressing steel cable anchoring device for a box girder. The external prestress steel cable anchoring device for the box girder comprises a support capable of being installed on the box girder, a steel anchoring part, a supporting assembly and a steering pipe, the steel anchoring part, the supporting assembly and the steering pipe are arranged on the support, and the supporting assembly comprises a plurality of first supporting steel plates and second supporting steel plates in one-to-one correspondence with the first supporting steel plates; the first supporting steel plate and the second supporting steel plate are arranged on the two sides of the steel anchoring part respectively and fixedly connected with the steel anchoring part. The steering pipe is located at the end, away from the steel anchoring part, of the first supporting steel plate, and the external prestressed steel beam can penetrate through the steering pipe and be anchored to the steel anchoring part. The external prestress steel beam anchoring device for the box girder is small in dead weight and convenient to construct, the construction cost is reduced, the construction period is shortened, the additional weight borne by the box girder is obviously reduced, and the safety of the box girder structure is guaranteed.

Embodiments of the present application relate to the technical field of camera modules, and specifically relate to a camera module and an electronic device. Embodiments of the present application provide a camera module, comprising: a shell, a lens assembly and a driving assembly, wherein the shell comprises an upper cover and a base arranged along a first direction, the lens assembly comprises a lens carrier and a lens, the lens carrier is arranged in the shell and can move relative to the shell, the lens carrier is provided with a first protruding structure and a second protruding structure, the first protruding structure is used for abutting against the upper cover, the second protruding structure is used for abutting against the base, the lens is arranged on the lens carrier, the driving assembly comprises a driving magnet and a driving coil, the driving magnet is arranged on the lens carrier, the driving coil is arranged on the shell, and the driving coil is used for driving the driving magnet to move the lens assembly, the lens carrier is formed by only one single component, which is conducive to reducing the size of the lens carrier, and further conducive to the miniaturization of the camera module and the electronic device.

The application discloses an aluminum alloy liquid cooling plate friction stir welding clamp and method, the clamp comprises a first base, a second base, a support beam, a first clamping plate, a second clamping plate and a stopper. The first clamping plate and the second clamping plate clamp the leaf cooling plate and ensure the vertical state, and the addition of the stopper expands the support surface, avoiding the problem that the protruding part of the stirring shaft shoulder cannot be supported and welded. The clamp has good rigidity and can meet the downward pressure load requirement of the friction stir welding, and the vertical welding mode meets the fusion depth and appearance requirements of the liquid cooling plate, and a high-quality liquid cooling plate is prepared.

The utility model discloses a grading wheel capable of preventing materials from caking, which comprises an annular upper plate, a circular lower plate, a main framework concentrically arranged with the upper plate and the lower plate, a transmission shaft sleeved in the main framework, n blades connected with the annular upper plate and the circular lower plate, and a blade support tube connected with the blades and the main framework, the transmission shaft is provided with a main gas path and a plurality of branch gas paths, the branch gas paths are communicated with the M branch paths, the blade supporting pipe comprises a hollow supporting pipe and a solid supporting pipe, m through holes are formed in the blade, m is larger than or equal to n, and the branch gas paths are communicated with the through holes formed in the blade through the hollow supporting pipe. An external air source can blow and sweep material particles hovering around the blades of the grading wheel for a long time, rapid friction between the hovering particles and the blades of the grading wheel is avoided, and then heat generation caused by long-time friction between the blades of the grading wheel and the hovering material particles is effectively avoided; therefore, the materials with low melting points enter a molten state during grading or crushing so as to be caked and further adhered to the blades of the grading wheel.

This utility model discloses a production and processing equipment for diamond mesh security screens, belonging to the field of screen processing technology. It includes a workbench with mounting grooves on both sides of its upper surface. Each mounting groove is rotatably connected to a threaded screw via bearings. Each threaded screw has a mounting seat threaded onto its surface. A clamping plate is fixedly connected to the upper end of each mounting seat. Each clamping plate has sliding grooves at both ends, and sliding rods are movably connected inside the sliding grooves. This utility model, by setting up clamping plates, ensures the window frame's stable position and precise positioning during processing, improving the equipment's versatility and practicality. By setting up positioning components, the device can flexibly meet the positioning needs of different corners of the security screen, achieving effective positioning of each corner of the security screen, ensuring the security screen remains stable during processing, and improving the overall quality and aesthetics of the product.

The utility model relates to the technical field of reinforcing formworks, in particular to a portable structural corner column reinforcing formwork which comprises a corner formwork mechanism, a corner connecting mechanism, a corner connecting mechanism and a connecting mechanism, and the corner formwork mechanism is arranged at the internal corner position of a wall and fixedly connected with the wall; the reinforcing mechanism comprises a reinforcing lead screw and supporting force rods, the reinforcing lead screw is fixedly connected with the corner formwork mechanism, a plurality of supporting force rods are arranged on the peripheral side of the reinforcing lead screw, and the distances between the supporting force rods and the reinforcing lead screw are equal; the fastening mechanism is located on the sides, away from the corner formwork mechanism, of the reinforcing lead screw and the supporting force rods, and the fastening mechanism is connected with the reinforcing lead screw and the supporting force rods in a locked mode.

The application discloses a battery pack water cooling device and a design method thereof, a battery pack and a vehicle thereof, and is used for providing a cooling structure for a battery cell of the battery pack. The battery pack water cooling device comprises a plurality of water cooling devices arranged at intervals. Spaces for accommodating the battery cells are arranged between adjacent water cooling devices. The water cooling device comprises a first flat plate and a second flat plate. A flow guide strip for providing a flow channel for a cooling liquid is arranged between the first flat plate and the second flat plate. The water cooling device of the application is no longer arranged at the bottom, but is arranged on a larger area of the square battery cell. The cooling area can be increased by several times. The heat conduction path is changed from the height direction of the battery cell to the thickness direction of the battery cell. The heat conduction path is greatly shortened. The cooling capacity and the battery charging speed are greatly improved. Meanwhile, the water cooling device arranged in the transverse direction can play a role of a cross beam. The structural strength of the battery pack is improved. The number of the cross beams of the battery pack is reduced. More battery cells can be accommodated.