166 results about "Battery sizing" patented technology

The invention provides a preparation method of a back contact cell assembly and the back contact cell assembly, and relates to the technical field of solar cells, a long cell string is firstly prepared, confluence fixing glue layers are formed on the back surfaces of a first piece, a tail piece and a middle piece, and then a first interconnection strip and a second interconnection strip are arranged. A plurality of long battery strings are then laid on the substrate. And an insulating isolation strip is arranged on the second interconnection strip at the preset position. And then bus bars are arranged on the insulating isolating bars and the bus fixing adhesive layer, and finally, a back plate is laid and laminated welding is carried out. Compared with the prior art, the bus bar can be hidden on the back surface of the battery, so that the size of the battery is increased, the space utilization rate of the module is improved, and the power of the module is improved. And meanwhile, by preparing the bus bar fixing adhesive layer in advance, high-temperature welding on the edge of the battery piece when the bus bar is fixed in the conventional technology is avoided, the warping phenomenon of the battery piece can be effectively avoided, the risk of subfissure or piece cracking is reduced, and the quality and yield of the battery are improved.

The utility model provides a battery dimension visual measurement device, and relates to the technical field of visual detection devices. Comprising a rack, a conveying mechanism, a bearing mechanism and a vision measurement mechanism, the bearing mechanism comprises a plurality of transparent quadrilateral bearing boxes, the plurality of bearing boxes are arranged and distributed in the middle of the conveying mechanism along a straight line in the conveying direction, and each bearing box is provided with a telescopic center straightening positioning piece; the vision measurement mechanism comprises two side shooting industrial cameras and a liftable high-angle shooting industrial camera, the two side shooting industrial cameras are arranged on the two sides of the conveying mechanism, and the high-angle shooting industrial camera is arranged over the middle position of the conveying mechanism. According to the utility model, the problem that the accuracy of the obtained external dimension cannot be ensured because the position accuracy of the measured battery relative to the shooting angle of the industrial camera is difficult to control by the conventional vision measurement device, namely, the different measured batteries are difficult to be positioned right below the high-angle shooting camera and are difficult to be straightened is solved.

The invention discloses a battery size detection system and method. The battery size detection system comprises a controller, a driving mechanism, a first camera and a second camera, wherein the driving mechanism is used for driving the clamping jaw to move the current battery to a photographing position; the first camera is used for acquiring a first three-dimensional image of the bottom surface of the current battery; the second camera is used for collecting a second three-dimensional image of the top surface of the current battery; the controller is used for synthesizing the first three-dimensional image and the second three-dimensional image to obtain a three-dimensional image of the current battery; determining a measurement reference plane of the current battery based on the three-dimensional image of the current battery; detecting size information of the current battery based on the measurement reference plane of the current battery and the three-dimensional image of the current battery; and the driving mechanism is used for driving the clamping jaw to move the current battery from the photographing position to the discharging position.

The invention relates to a heat dissipation device for an automobile power battery pack, and belongs to the technical field of battery heat management. Comprising a plurality of liquid cooling units, the liquid cooling units are distributed along the extension direction of a single cell assembly, the plurality of liquid cooling units are distributed on two sides of the cell assembly, one side of each liquid cooling unit is provided with a liquid inlet, and the other side of each liquid cooling unit is provided with a liquid outlet; connecting holes are formed in the first communicating pipelines, and the first communicating pipelines are in one-to-one correspondence with the liquid cooling units, are arranged on the two sides of the same liquid cooling unit respectively and are used for connecting the liquid inlet and the liquid outlet; and the two second communication pipelines are wound on the peripheral side of the battery cell assembly, and the communication pipelines are communicated with the two ends of the first communication pipeline. By arranging the first communication pipeline and the second communication pipeline, the size of the battery and a cooling channel with a distance from the liquid inlet are compensated, the temperature difference is reduced, and the cooling efficiency is improved.

The objective is to obtain a vehicle body structure that suppresses the residual deformation of components positioned in front of the motor unit in the longitudinal direction of the vehicle during a frontal collision, and that reduces the constraints on the size of the battery that can be mounted. [Solution] The vehicle body structure S includes a motor unit 30 to which power is supplied and which outputs driving force for driving; a skeletal member 11 which is integrally molded by die casting and forms the frame of the vehicle, is disposed on the rear side of the vehicle of the motor unit 30 and includes a support portion 28 that supports a part of the motor unit 30; a protruding portion 36 provided on the motor unit 30 and projecting toward the skeletal member 11 side; and a recess provided on the support portion 28, which is open toward the motor unit 30 side and into which the protruding portion 36 is fitted.

The application discloses a kind of full-automatic battery sorting equipment, it is related to battery sorting equipment technical field, workbench is provided with conveyor belt one, conveyor belt two and conveyor belt three, the conveyor belt one, conveyor belt two and conveyor belt three are all installed with conveying motor, the outside surface of conveyor belt one, conveyor belt two and conveyor belt three is all fixedly connected with several bearing parts, the outside end of bearing part is equipped with bearing groove, the size detection mechanism is arranged between conveyor belt one and transmission belt two, the voltage detection mechanism is arranged between transmission belt two and transmission belt three.Under the action of push cylinder one, battery is pushed to size detection device, when contact sensor contacts with the upper end of receiving plate, inductor does not sense slide bar, battery size is qualified, so as to push battery to conveyor belt two by push cylinder one, when inductor senses slide bar, battery size is unqualified, under the action of sorting cylinder one, battery is pushed downward, and is pushed out from sorting hole one.

The utility model provides a battery dimension measuring tool and a battery measuring device, and belongs to the field of battery measurement. The battery size measuring tool comprises a base, a first positioning assembly, a second positioning assembly and a supporting assembly, the base comprises a first guide rail and a second guide rail which are arranged in parallel at intervals, and the two ends of a third guide rail are connected with the first guide rail and the second guide rail respectively; the first positioning assembly is connected with at least one of the first guide rail and the second guide rail; the first positioning assembly comprises a first positioning part, and the first positioning part is used for providing limiting along a second direction for the to-be-detected workpiece; the second positioning assembly is connected with the third guide rail; the second positioning assembly comprises a second positioning part, and the second positioning part is used for limiting the to-be-detected workpiece in the first direction; the supporting assembly is connected with the base and used for supporting the to-be-tested workpiece in the third direction. The battery dimension measurement tool can improve the reliability of battery measurement and fixation and the convenience of measurement.

The utility model relates to the technical field of lithium battery dimension detection, in particular to a soft package lithium battery dimension detection device, which comprises a bottom plate, a movable shaft is movably arranged on the top surface of the bottom plate, a detection frame is arranged on the back surface of the movable shaft, and an insertion rod is inserted into the inner side wall of the detection frame. An adjusting plate is mounted on the surface of the right side of the insertion rod, and a detection groove is formed in the detection frame. The top plate is mounted on the upper surface of the detection frame, a mounting cylinder is mounted on the right side surface of the top plate, a mounting column is arranged in the mounting cylinder, and a fixing ring is mounted on the right side surface of the mounting column. According to the utility model, if the soft package lithium battery does not slide off from the surface of the detection groove, the soft package lithium battery is an unqualified soft package lithium battery, and meanwhile, the adjusting plate can be moved by pulling the insertion rod in the detection frame, so that the size of the detection groove can be adjusted, and the soft package lithium batteries with different sizes can be placed for detection.

The automatic OCV test equipment for soft-pack power lithium-ion batteries includes: a frame for installing working parts; a motion mechanism unit, which is arranged in the mounting cavity of the frame, including a probe plate assembly and a motion mechanism; a tray conveying unit, which is used to place the tray and convey the tray to the tray conveying line outside the frame; a battery tray; an OCV test unit, which is used to collect the OCV parameters of the soft-pack power lithium-ion battery to be tested; and a controller, which is arranged in the mounting cavity of the frame, and the control ends of the motion mechanism unit and the tray conveying unit are electrically connected to the corresponding pins of the controller; the signal output end of the motion mechanism unit is electrically connected to the OCV test unit, and the signal output end of the controller is signal-connected to the signal input end of an external server. The beneficial effects of the present invention are embodied in that the automatic OCV test equipment for soft-pack power lithium-ion batteries is compatible with a variety of battery sizes, improves the efficiency of automated production, realizes the automatic detection of battery OCV parameters, and is simple to operate.

The utility model belongs to the field of lithium battery brackets, and provides a lithium battery bracket capable of being quickly assembled, which comprises a plurality of square lithium batteries, the assembling mechanisms are fixedly arranged at the tops and the bottoms of the square lithium batteries; the connecting mechanism is fixedly arranged at the top of the assembling mechanism; the electrode mechanism is arranged at the top of the assembling mechanism; the lithium battery top frame and the lithium battery bottom frame which are made of insulating flame-retardant materials are installed at the tops and the bottoms of the square lithium batteries, and the lithium battery top frame and the lithium battery bottom frame are arranged in the lithium battery top frame and the lithium battery bottom frame according to the sizes of the square lithium batteries needing to be assembled. The square lithium batteries are divided into the plurality of mounting cavities by the plurality of limiting partition plates, so that the plurality of square lithium batteries can be conveniently and quickly assembled between the lithium battery top frame and the lithium battery bottom frame in cooperation with the plurality of mounting cavities, the assembling speed of the square lithium batteries is improved, and the square lithium batteries are safer and more stable after being assembled and are not easy to shake.

The invention relates to the technical field of power batteries, in particular to a power battery thermal runaway protection device and method and a battery pack, the device comprises a direct cooling plate, a hot melting plug and a liquid inlet and outlet connector, the power battery pack adopts a direct cooling and direct heating thermal management mode, and the working pressure of direct cooling and direct heating is higher than that of liquid cooling and liquid heating, so that the thermal runaway protection effect is improved. Therefore, direct cooling and direct heating quickly respond to thermal runaway of the power battery and quickly absorb heat through phase change, and the refrigerant absorbs heat from a liquid state to a gas state to absorb part of heat of the battery cell; when the battery is in thermal runaway, the temperature of the battery cell in thermal runaway is abnormal, and the hot melting plug at the bottom of the battery cell is melted, so that the abnormal battery cell can be accurately positioned, a refrigerant is quickly sprayed out from the interior of the direct cooling plate, the abnormal battery cell is quickly cooled, and finally the refrigerant is injected into the battery pack for immersed cooling, thereby solving the problem of inhibiting the thermal runaway of the battery. Therefore, the technical problem of effectively preventing the thermal runaway of the battery under the condition of not increasing the size of the battery can be solved.

The embodiment of the invention provides a battery simulation method and device, electronic equipment, a storage medium and a product. The method comprises the following steps: receiving a simulation request, wherein the simulation request comprises the battery size of a target battery; dividing a battery cell of the target battery into a plurality of sub-domains according to the battery size; establishing a plurality of electrochemical models corresponding to the plurality of sub-domains, and determining a plurality of voltage boundary conditions corresponding to the plurality of electrochemical models through the current collector electric field model; according to the multiple voltage boundary conditions, each electrochemical model is coupled with a thermal model and a mechanical model, and multiple coupling models are obtained; and performing simulation calculation on the plurality of coupling models to obtain a simulation result of the target battery. According to the scheme, the plurality of independent electrochemical models corresponding to the plurality of sub-domains are established, and the plurality of electrochemical models are subjected to simulation calculation respectively, so that the non-uniform reaction of each sub-domain can be analyzed respectively, and the simulation accuracy is improved.

The utility model provides a double-channel different-side button type battery clamp, which comprises a bottom plate, a back plate, a guide rod, a linear bearing, a fixing block, a test clamp assembly, a battery tray and a toggle clamp assembly, the back plate is arranged on one side of the bottom plate, the toggle clamp assembly is arranged on the upper portion of the back plate, the test clamp assembly is arranged on the lower portion of the back plate, and the toggle clamp assembly is arranged on the lower portion of the bottom plate. The fixing blocks are fixed to the two sides of the lower portion of the back plate, one end of the guide rod is fixedly connected with the bottom plate, the other end of the guide rod penetrates through the testing clamp assembly to be connected with the fixing blocks, the toggle clamp assembly is connected with the testing clamp assembly, a battery tray is arranged on the testing clamp assembly, and the battery tray is connected with the toggle clamp assembly. A plurality of button cells are arranged on the cell tray, a probe on the test clamp assembly is aligned with the button cells on the cell tray for testing, and the button cell testing device has the advantages of being simple in structure, convenient to operate, small in testing size, convenient and fast to test, high in accuracy and capable of being compatible with different cell sizes.

The present invention provides a size measurement and insulation resistance measurement machine for encapsulated blade batteries, which includes a machine table and a loading and handling device, a transfer device, an equidistant transfer device, a constant-pressure size measurement device, a constant-pressure insulation resistance measurement device, a flipping device, and a discharging and handling device arranged thereon. The constant-pressure size measurement device is used to press the surface to be measured of the battery, and measures the length, width, and thickness of the battery through its displacement sensor. The constant-pressure insulation resistance measurement device presses the surface to be measured of the battery through its conductive rubber plate and measures the insulation resistance value of the surface to be measured. When measuring the size of the blade battery, an appropriate pressure can be applied to the battery surface, which can eliminate deformation problems such as bulging and depression on the battery surface, and overcome the problem that the existing measurement equipment has inaccurate measurement due to the deformation of the battery itself. The constant-pressure insulation resistance measurement device uses a conductive rubber plate as a probe and measures while sticking to each surface to be measured of the battery under appropriate pressure, avoiding the problem of damaging the insulation film when using a conventional probe to contact the insulation film.

The present application discloses a battery module, a module including annular batteries, and an electrical device. The battery module includes single batteries, and heat dissipation holes are provided in the middle of the single batteries; a cooling unit, including a first cooling flow channel, wherein the first cooling flow channel is formed in the heat dissipation holes for dissipating heat from the middle of the single batteries. By providing heat dissipation holes in the middle of the single batteries and arranging the first cooling flow channel in the heat dissipation holes to dissipate heat from the middle of the single batteries, the heat dissipation performance is improved. On the basis of the improved heat dissipation performance, the battery size can be further increased. In addition, the temperature of the battery will not be too high due to poor heat dissipation, enabling the battery to operate in a relatively ideal temperature environment, with high activity of the active substances in the battery, so the electrical performance of the battery can be improved. Moreover, since the battery does not have the problem of overheating, the problem of the battery catching fire or even exploding due to high temperature is avoided. Therefore, the safety performance is improved.

The invention discloses a universal adjustable placement assembly for UPS batteries, and belongs to the field of battery placement racks, the universal adjustable placement assembly comprises a placement frame, sliding grooves are formed in the middles of the two sides of the placement frame, ventilation openings are formed in the two sides of each sliding groove, a clamping mechanism is arranged in the placement frame, and the adjustable placement assembly comprises a placement plate arranged in the placement frame; a ventilation groove is formed in the containing plate, pull rods penetrate through the two sides of the ventilation groove, one ends of the pull rods are connected with baffles, and springs are arranged between the baffles and the ventilation groove and connected to the surfaces of the pull rods in a sleeving mode. Through the arrangement of the adjusting placement assembly, during use, pull frames on the two sides are pulled, then the pull frames pull and drive pull rods on the two sides of a placement plate, springs are compressed through baffles while the pull rods are pulled, then the pulled pull frames drive limiting rods to be separated from heat dissipation holes, and then the placement plate is moved upwards or downwards; the height of the placement plate can be adjusted according to the size of the battery, so that the use flexibility of the placement device is improved.

The application discloses a kind of recovery discharge control methods of waste lithium battery, comprising: S1: the size of battery is measured by measuring table, the battery size after measurement is compared with the data in database, and the battery discharge scheme suitable for the battery currently detected is obtained, and the best discharge current scheme corresponding to the battery is obtained;S2: let the feeding and discharging manipulator clamp the battery after measurement and carry out feeding;S3: let the pole of battery press on copper sheet;S4: discharge cabinet passes through wiring terminal output best current and turns on copper sheet to discharge battery;S5: feeding and discharging manipulator transports battery to the second half of milling section discharge transmission belt, and the application can adapt the most suitable current to discharge battery.

The utility model discloses a cover plate and a battery, the cover plate comprises a cover body, the cover body is provided with a first mounting hole and a second mounting hole, and one side, close to the interior of the battery, of the cover body is provided with a groove; a first pole and a second pole; the deformation part is arranged on the side, close to the interior of the battery, of the cover body, when the internal pressure of the battery is smaller than a preset value, the deformation part is separated from the cover body, and when the internal pressure of the battery is increased to the preset value, the other end of the deformation part moves towards the direction of the cover body and then makes contact with the cover body to form a short circuit; and the groove is used for accommodating the other end of the deformation piece. According to the embodiment of the invention, the groove can be used as a stamping accommodating deformation space on the cover body, and the groove and the deformation piece are matched with each other, so that not only is mistaken short circuit avoided, but also the situation that the size of the battery is increased due to the arrangement of the deformation piece can be avoided.

The embodiment of the invention provides a cylindrical battery and a thermal management system of the cylindrical battery, the cylindrical battery comprises a shell and a battery cell, the shell comprises a peripheral shell, a bottom shell and an end cover, and the bottom shell and the end cover are respectively connected to two ends of the peripheral shell in the axial direction; the battery cell is arranged in the shell, and an inner pipe which is arranged in the axial direction of the battery cell and penetrates through the interior of the battery cell is connected between the bottom shell and the end cover; and the inner pipe is used for being communicated with an external cooling pipeline or allowing the external cooling pipeline to penetrate through. According to the cylindrical battery disclosed by the invention, heat in the battery cell can be directly taken away by utilizing the cooling pipeline which is communicated with the inner pipe or penetrates through the inner pipe, so that accurate adjustment of the temperature in the cylindrical battery is realized, the problem of difficulty in heat exchange in a large-size cylindrical battery is solved, the performance and the safety of the battery are improved, and the limitation of an internal heat dissipation section on the size of the cylindrical battery is relieved.

The utility model belongs to the technical field of battery manufacturing, and discloses a battery formation device which comprises a plurality of extrusion pieces, a bearing piece and a thickness compensation piece, the extrusion pieces are arranged at intervals, a mounting space is defined between every two adjacent extrusion pieces, the bearing piece is used for supporting a battery, and the thickness compensation piece is used for compensating the thickness of the battery. Each thickness compensation piece is movably mounted on the extrusion piece; the thickness compensation part can be inserted into the supporting groove and is arranged corresponding to the thinning area. The battery formation device can compensate the thickness loss caused by the thinning area, ensures that the middle part and the end part of the battery are subjected to the same extrusion force, avoids lithium precipitation in the thinning area, and can adjust the size of the thickness compensation piece inserted into the bearing piece according to the size of the battery and the thinning area, thereby meeting the clamping requirements of batteries of different models, and improving the clamping efficiency. And the device can be compatible with batteries with various dimensions.

Embodiments of the present disclosure present devices, methods, and computer readable medium for techniques for measuring operational performance metrics, and presenting these metrics through an application programming interface (API) for developers to access for optimizing their applications. Exemplary metrics can include central processing unit or graphics processing unit time, foreground / background time, networking bytes (per application), location activity, display average picture luminance, cellular networking condition, peak memory, number of logical writes, launch and resume time, frame rates, and hang time. Regional markers can also be used to measure specific metrics for in application tasks. The techniques provide multiple user interfaces to help developers recognize the important metrics to optimize the performance of their applications. The data can be normalized over various different devices having different battery size, screen size, and processing requirements. The user interfaces can provide an intelligent method for visualizing performance changes for significant changes in application versions.

The utility model relates to a hydroelectric connector margin mechanism of a battery replacement system of an electric vehicle, which comprises a hydroelectric connector margin mechanism arranged between layers or on the layers of a battery rack, the mechanism comprises a guide rail V arranged on an upright post of the battery rack, a sliding block III arranged on the guide rail V, and a guide rail VI arranged on the sliding block III through a hydroelectric connector up-and-down sliding seat. The base is horizontally arranged; the hydroelectric connector is installed on the guide rail VI through the sliding block IV. The driving mechanism drives the hydroelectric connector up-down sliding seat or the sliding block III to slide up and down along the guide rail V. The sliding block III is connected with a horizontally-arranged cam positioning piece, the cam positioning piece is arranged in a displacement groove of a hydroelectric connector displacement column through a pin shaft, and the distances between the two sections of communicated displacement grooves and a guide rail V are different and correspond to charging ports of two batteries of different sizes. According to the utility model, the technical problems of low docking efficiency, complex operation and high maintenance cost caused by battery size diversification in the prior art are solved.

The present invention discloses a battery size detection mechanism comprising: a conveying device, a size detection device and a lifting device. The conveying device comprises a feeding belt and a loading jig. The feeding belt is provided with a detection area. When the feeding belt drives the battery on the loading jig to move to the detection area, the lifting device is used to lift the battery from the loading jig. The size detection device is used to detect the diameter and thickness of the battery. The battery size detection mechanism of the present invention is provided with a conveying device, a size detection device and a lifting device, so that the feeding belt can drive the battery on the loading jig to the detection area, and lift the battery from the loading jig by the lifting device. Finally, the lifted battery is tested for diameter and thickness by the size detection device. In this way, not only can fully automated detection of battery diameter and thickness be achieved, but also detection accuracy and efficiency can be improved.

The utility model discloses medium-density battery negative pressure transferring and capping equipment which comprises a supporting frame, a turnover structure is fixedly connected in the supporting frame, a battery to be capped is arranged on the upper surface of the turnover structure, a turnover speed reducer is fixedly connected to the outer surface of the turnover structure, and a turnover device is fixedly connected to the output end of the turnover speed reducer. According to the device, through the cooperative use of the overturning knot and the mounting structure, automatic overturning and capping of batteries can be realized, the vacuum chuck is manually operated, the capped batteries are transferred and stacked, the batteries can be connected to an existing production line more flexibly and reliably, and the problems that most of the batteries are manually overturned and capped, but medium-density batteries are large and heavy, and the cost is high are solved. In the prior art, large batteries often reach more than 50 kilograms, the labor is consumed, the working condition is bad, some automatic equipment can turn over the large batteries and automatically enter an oven, but the mechanism is large in action, large in occupied area and high in requirements for positioning precision and battery size.

A battery holding and dispensing device can hold a plurality of batteries, in a single battery size or an assortment of battery sizes. The battery holding and dispensing device includes a frame having a plurality of compartments sized and shaped to each receive a battery of a particular battery size and each having a magnetic insert for releasably retaining the battery in the compartment. A system is disclosed for inductive charging of batteries held in a caddy.

The application discloses a modular plug-in type battery box shell and relates to the technical field of battery charging. The core structure comprises four groups of vertically arranged frames in rectangular distribution. The frames are arranged in a longitudinal and transverse manner through horizontal limiting frames and vertical limiting frames to form adjustable accommodating cavities. The cavity size can be flexibly changed through a first adjusting part and a second adjusting part to adapt to different specifications of batteries. The outer part of the vertically arranged frames is covered with a sealed cabinet body and a cabinet door to form a protective layer. A heat inside-out circulation part and a constant temperature module are arranged in the inside part. Efficient heat dissipation and constant temperature control are realized through the communication of the heat dissipation holes. The power supply system comprises a hanging power supply cabinet. The extended power supply wire end is connected with a power supply plug. The plug is fixed to the horizontal limiting frame through the plug-in column of the telescopic mounting support. The position can be adjusted according to the size of the battery. The support and the plug can be detached, thereby meeting the outdoor temporary charging demand. The design realizes the flexible adaptation, safe heat dissipation and convenient power supply of the battery.

To provide a working machine in which a casing can be interposed between a battery and a rear protective member even if the battery size is increased.SOLUTION: The counter weight 20 has the facing surface 32f that is the front surface 32 facing the box 30 in the front-rear direction, at least one of the end portion 32f and the 36R at the left end and the right end of the facing surface 36L is located forward of the central portion 32f in the left-right direction of the facing surface 36M, and at least one of the thickness THl in the front-rear direction at the left end of the box 30 and the thickness THr in the front-rear direction at the right end of the box 30 is smaller than the thickness THm of the central portion.SELECTED DRAWING: Figure 3

A multilayer thermal barrier, batten7 modules, and associated methods are disclosed. In one example, a resilient layer of a multilayer thermal barrier is dimensioned to a footprint substantially the same size as a lithium-ion pouch cell. Configurations are shown where a thermal insulation layer extends laterally beyond the footprint.

The utility model belongs to the technical field of batteries, and discloses a battery size detection device and a battery production line. The battery size detection device comprises a battery fixing piece and a detection mechanism, wherein a battery can be fixed on the battery fixing piece or taken out from the battery fixing piece; the detection mechanism comprises a camera assembly and a light source, the camera assembly and the light source are arranged on the two sides of the battery fixing part respectively, the camera assembly comprises a plurality of cameras, a lens of each camera faces the battery, the extension direction of the fixed battery is defined as a first direction, and the extension direction of each camera is defined as a second direction; at least two rows of cameras are arranged in the first direction, each row is provided with two cameras arranged side by side in the third direction, the third direction is perpendicular to the first direction and the second direction, and the two cameras in the same row are configured to take pictures of the opposite outer sides of the battery so as to obtain the diameter of the battery at the position. According to the battery size detection device and the battery production line, the measured battery data is more accurate, and the measurement error is small.

The utility model discloses a low-voltage lithium battery pack structure which comprises a shell and a battery module, and an accommodating cavity is formed in the shell; the battery module is arranged in the accommodating cavity, the battery module comprises a battery cell main body and a BMS (Battery Management System) device, the battery cell main body is square, the BMS device is arranged on any one of four side surfaces of the square, and the BMS device is connected with a positive electrode and a negative electrode of the battery cell main body through a connecting bar. According to the utility model, the BMS device is assembled on the end plate or the side plate of the battery module, so that the height of the module is reduced, and the technical problems that the size of the battery module assembled into a Pack structure is relatively large and the size boundary requirement of a low-voltage lithium battery is not met are solved.