A power battery assembly system and method

Abstract

This application relates to the field of automotive technologies, and particularly to a power battery assembly system and method. A power battery assembly system for assembling a vehicle body and a power battery, the power battery assembly system comprising: a vehicle body guiding vehicle for delivering the vehicle body to an assembly station; a battery guiding vehicle for delivering the power battery to the assembly station; a lifting mechanism located at the assembly station, the lifting mechanism being used for lifting and lowering the vehicle body, the lifting mechanism including a lifting bracket, the lifting bracket being provided with a movable positioning group and a fixed positioning group, the movable positioning group being capable of moving relative to the lifting bracket in the length direction, and the fixed positioning group and the movable positioning group being capable of forming multiple groups of positioning combinations; a positioning and deviation correction mechanism located at the assembly station, the positioning and deviation correction mechanism being used for positioning the vehicle body and the power battery respectively, the positioning and deviation correction mechanism including a bracket and a jacking assembly and a positioning assembly mounted on the bracket, the jacking assembly being capable of driving the positioning assembly to move in the height direction.

Description

Technical Field

[0001] The present application relates to the technical field of automobiles, and particularly relates to a power battery assembly system and method. Background Art

[0002] Currently, with the explosive growth in the demand for domestic electric vehicles, the assembly of power batteries in the final assembly is of crucial importance in the process of new energy vehicle final assembly. The accuracy, efficiency, personnel utilization rate, assembly flexibility, and tooling system compatibility of power battery assembly all test the degree of lean manufacturing. In order to achieve high compatibility, meet the rapid iteration of products, the expandability and flexibility of the power battery assembly process, a highly flexible power battery assembly mechanism can be developed to achieve island-style assembly, which plays a vital role in the lean production of the final assembly line.

[0003] The existing production lines in the final assembly workshop all use the method of chassis lifting devices to carry the vehicle body, use AGVs to carry power batteries, and use manual lifting methods. With the human eye watching, the operation of the AGV is upgraded to achieve the lifting and positioning process of the battery tray and the vehicle body. Then, manual tools are used to tighten the battery standard parts, and finally, an electric gun is used to tighten the torque of the battery standard parts. This traditional assembly process has some technical defects. For example, the chassis production line and the chassis lifting device structure require a lot of working area for operation, causing a large waste of factory space; from the AGV receiving the vehicle to the transfer island chassis lifting device, the transfer system requires many devices and has a complex structure; the lifting device is compatible with different vehicle widths and lengths of vehicle models, requiring complex adaptation and positioning tooling, and one set of tooling can only be compatible with one vehicle model, with great limitations; the lifting device and the traditional AGV cannot achieve precise stopping positions and cannot meet the precise requirements of automatic power battery assembly. Summary of the Invention

[0004] The present application provides a power battery assembly system and method, aiming to improve the lifting compatibility of vehicle models with different widths and wheelbases, and improve the positioning accuracy of the vehicle body and the power battery by sharing a positioning and deviation correction mechanism between the vehicle body and the power battery.

[0005] The present application provides a power battery assembly system for assembling a vehicle body and a power battery. The power battery assembly system includes:

[0006] A vehicle body guiding vehicle for sending the vehicle body to the assembly station;

[0007] A battery guiding vehicle for sending the power battery to the assembly station;

[0008] The lifting mechanism is located at the assembly station. The lifting mechanism is used to lift and lower the vehicle body. The lifting mechanism includes a lifting bracket, and the lifting bracket is provided with a moving positioning group and a fixed positioning group. The moving positioning group can move relative to the lifting bracket in the length direction, and the fixed positioning group and the moving positioning group can form multiple groups of positioning combinations;

[0009] The positioning and deviation correction mechanism is located at the assembly station. The positioning and deviation correction mechanism is used to position the vehicle body and the power battery respectively. The positioning and deviation correction mechanism includes a bracket and a jacking assembly and a positioning assembly installed on the bracket. The jacking assembly can drive the positioning assembly to move in the height direction.

[0010] In a possible design, the moving positioning group includes a first driving member, a moving support block and at least two groups of first positioning members;

[0011] The first driving member can drive the moving support block and at least two groups of the first positioning members to move in the length direction to adjust the positions of the moving support block and at least two groups of the first positioning members relative to the vehicle body;

[0012] Among at least two groups of the first positioning members, at least one group of the first positioning members can cooperate with the vehicle body.

[0013] In a possible design, each group of the first positioning members includes a positioning pin and a lifting cylinder, and the lifting cylinder can drive the positioning pin to lift and lower in the height direction.

[0014] In a possible design, the fixed positioning group includes a fixed support block and at least three groups of second positioning members;

[0015] Among at least three groups of the second positioning members, at least one group of the second positioning members can cooperate with the vehicle body.

[0016] In a possible design, each group of the second positioning members includes a positioning pin and a lifting cylinder, and the lifting cylinder can drive the positioning pin to lift and lower in the height direction.

[0017] In a possible design, the lifting mechanism further includes a signal control module and a valve island group, and the signal control module and the valve island group are installed on the lifting bracket;

[0018] The signal control module is used to receive the signal sent by the control system and control the valve island group to open the valve of the lifting cylinder corresponding to the required positioning pin;

[0019] The signal control module can also receive the in-place signal sent by the lifting cylinder and feedback it to the control system.

[0020] In a possible design, the jacking assembly includes a second driving member, a driving pull rod, and a jacking member;

[0021] The positioning assembly is connected to the jacking member;

[0022] The second driving member can drive the driving pull rod to move in the length direction, the driving pull rod can push the jacking member to move in the height direction, and the jacking member can drive the positioning assembly to move in the height direction.

[0023] In a possible design, the driving pull rod is provided with a driving inclined surface;

[0024] The jacking member includes a jacking column and a roller. The roller is installed below the jacking column and can rotate relative to the jacking column;

[0025] When the driving pull rod moves in the length direction, the roller can move along the driving inclined surface.

[0026] In a possible design, the jacking member is further provided with a jacking sphere. The jacking sphere is installed above the jacking column and can rotate relative to the jacking column;

[0027] The jacking sphere can respectively jack up the vehicle body and the power battery, so that the positioning assembly can respectively position and correct the deviation of the vehicle body and the power battery.

[0028] In a possible design, the bracket includes a column. The column is provided with a first slide rail, and the jacking column is provided with a slider. The slider is installed on the first slide rail and can move along the first slide rail.

[0029] In a possible design, the column is further provided with a limiting portion. The slider is located between the limiting portions to limit the jacking member from detaching from the bracket.

[0030] In a possible design, the jacking assembly further includes a position sensor, and the driving pull rod is provided with a sensed portion;

[0031] The position sensor can sense the position of the sensed portion to judge the position of the jacking member.

[0032] In a possible design, the positioning assembly includes a guiding and positioning member and a jacking cylinder;

[0033] The jacking cylinder can drive the guiding and positioning member to lift and lower in the height direction.

[0034] In a possible design, the guiding and positioning member includes a connected guiding portion and a positioning and deviation-correcting portion. In the direction away from the guiding portion, the cross-sectional area of the positioning and deviation-correcting portion gradually increases.

[0035] In a possible design, the power battery assembly system further includes a floating tightening mechanism;

[0036] The floating tightening mechanism includes a tightening manipulator and a plurality of floating connecting rods. The plurality of floating connecting rods are installed on a tray for placing the power battery, and fasteners are placed inside the floating connecting rods;

[0037] The tightening manipulator can drive the floating connecting rods to align the fasteners with the mounting holes of the vehicle body and the power battery, and drive the fasteners to connect the vehicle body and the power battery.

[0038] The present application also provides a method for assembling a power battery. Using the above-mentioned power battery assembly system, the assembly method includes:

[0039] Controlling the vehicle body guiding vehicle to drive the vehicle body to the assembly station;

[0040] Controlling the positioning and deviation correction mechanism to position and correct the deviation of the vehicle body;

[0041] Controlling the lifting mechanism to lift the vehicle body;

[0042] Controlling the vehicle body guiding vehicle to drive away from the assembly station;

[0043] Controlling the battery guiding vehicle to carry the power battery to the assembly station;

[0044] Controlling the positioning and deviation correction mechanism to position and correct the deviation of the power battery;

[0045] Controlling the battery guiding vehicle to drive away from the assembly station;

[0046] Controlling the lifting mechanism to lower the vehicle body to a position where it cooperates with the power battery;

[0047] Controlling the tightening manipulator to tighten the fasteners;

[0048] Controlling the vehicle body guiding vehicle to drive into the assembly station, and the vehicle body and the power battery fall onto the vehicle body guiding vehicle;

[0049] Controlling the vehicle body guiding vehicle to drive away from the assembly station.

[0050] It should be understood that the above general description and the following detailed description are only exemplary and do not limit the present application. Description of the Drawings

[0051] Figure 1 It is a schematic structural diagram of the power battery assembly system provided by the present application;

[0052] Figure 2Structural schematic diagram of the lifting bracket provided by this application;

[0053] Figure 3 Structural schematic diagram of the positioning and deviation correction mechanism provided by this application;

[0054] Figure 4 Structural schematic diagram of the positioning and deviation correction mechanism provided by this application;

[0055] Figure 5 is Figure 4 Partial structural schematic diagram of the jacking assembly in

[0056] Figure 6 is Figure 4 Partial structural schematic diagram of the jacking assembly and the positioning assembly in

[0057] Figure 7 is Figure 4 Structural schematic diagram of the cooperation between the jacking member and the driving pull rod in

[0058] Reference numerals:

[0059] 1 - Vehicle body guiding vehicle;

[0060] 2 - Battery guiding vehicle;

[0061] 3 - Lifting mechanism;

[0062] 31 - Lifting bracket;

[0063] 311 - Moving positioning group;

[0064] 311a - First driving member;

[0065] 311b - Moving support block;

[0066] 311c - First positioning member;

[0067] 311c1 - Positioning pin;

[0068] 311c2 - Lifting cylinder;

[0069] 312 - Fixed positioning group;

[0070] 312a - Fixed support block;

[0071] 312b - Second positioning member;

[0072] 313 - Bracket main body;

[0073] 313a - Connecting flange;

[0074] 313b - Second slide rail;

[0075] 313c - Bottom plate;

[0076] 32 - Lifting manipulator;

[0077] 33 - Signal control module;

[0078] 34 - Valve island group;

[0079] 4 - Positioning and deviation correction mechanism;

[0080] 41 - Bracket;

[0081] 411 - Column;

[0082] 411a - First slide rail;

[0083] 411b - Limiting part;

[0084] 42 - Jacking assembly;

[0085] 421 - Second driving part;

[0086] 422 - Driving pull rod;

[0087] 422a - Driving inclined plane;

[0088] 422b - Jacking block;

[0089] 422b1 - Plane;

[0090] 422b2 - Limiting block;

[0091] 422c - Inductive part;

[0092] 423 - Jacking part;

[0093] 423a - Jacking column;

[0094] 423a1 - Slide block;

[0095] 423b - Roller;

[0096] 423c - Jacking sphere;

[0097] 424 - Position sensor;

[0098] 43 - Positioning assembly;

[0099] 431 - Guide and positioning part;

[0100] 431a - Guide part;

[0101] 431b - Positioning and deviation correction part;

[0102] 432 - Jacking cylinder;

[0103] 5 - Floating tightening mechanism;

[0104] 51 - Tightening manipulator;

[0105] 52 - Floating connecting rod;

[0106] 6 - Tray.

[0107] The accompanying drawings here are incorporated into the specification and form a part of this specification, showing embodiments in line with this application, and are used together with the specification to explain the principles of this application. Detailed implementation manners

[0108] For a better understanding of the technical solutions of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0109] It should be clear that the described embodiments are only a part of the embodiments of this application, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in this application without creative efforts fall within the scope of protection of this application.

[0110] The terms used in the embodiments of this application are only for the purpose of describing specific embodiments, and are not intended to limit this application. The singular forms of "a", "the" and "said" used in the embodiments of this application and the appended claims are also intended to include the plural forms, unless the context clearly indicates otherwise.

[0111] It should be understood that the term " / and" used herein is only a description of the associated relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " herein generally represents an "or" relationship between the associated objects before and after.

[0112] It should be noted that the orientation terms such as "upper", "lower", "left" and "right" described in the embodiments of this application are described from the angles shown in the accompanying drawings and should not be construed as a limitation on the embodiments of this application. In addition, in the context, it should also be understood that when it is mentioned that an element is connected "above" or "below" another element, it can not only be directly connected "above" or "below" another element, but also be indirectly connected "above" or "below" another element through an intermediate element.

[0113] Such as Figures 1 to 3As shown in the figure, this embodiment provides a power battery assembly system for assembling a vehicle body and a power battery. The power battery assembly system includes a vehicle body guiding vehicle 1, a battery guiding vehicle 2, a lifting mechanism 3, a positioning and deviation correction mechanism 4, and a floating tightening mechanism 5. The vehicle body guiding vehicle 1 is used to send the vehicle body to the assembly station, and the battery guiding vehicle 2 is used to send the power battery to the assembly station. The lifting mechanism 3 is located at the assembly station. The lifting mechanism 3 is used to lift the vehicle body. The lifting mechanism 3 includes a lifting bracket 31 and a lifting manipulator 32. The lifting bracket 31 can support the vehicle body, and the lifting manipulator 32 can lift the lifting bracket 31 to realize the lifting of the vehicle body. The lifting bracket 31 is provided with a moving positioning group 311 and a fixed positioning group 312. The moving positioning group 311 can move relative to the lifting bracket 31 along the length direction Y, and the fixed positioning group 312 and the moving positioning group 311 can form multiple groups of positioning combinations. The positioning and deviation correction mechanism 4 is located at the assembly station. The positioning and deviation correction mechanism 4 is used to position the vehicle body and the power battery respectively. The positioning and deviation correction mechanism 4 includes a bracket 41 and a jacking component 42 and a positioning component 43 installed on the bracket 41. The jacking component 42 can drive the positioning component 43 to move along the height direction Z. The floating tightening mechanism 5 includes a tightening manipulator 51 and a plurality of floating connecting rods 52. The plurality of floating connecting rods 52 are installed on a tray 6 for placing the power battery. Fasteners are placed inside the floating connecting rods 52. The tightening manipulator 51 can drive the floating connecting rods 52 to align the fasteners with the mounting holes of the vehicle body and the power battery, and drive the fasteners to connect the vehicle body and the power battery.

[0114] In this embodiment, both the vehicle body guiding vehicle 1 and the battery guiding vehicle 2 are automatic guided vehicles (AGVs). The vehicle body guiding vehicle 1 transports the vehicle body to the assembly station, completes the pre-positioning of the vehicle body, performs positioning and deviation correction on the vehicle body through the positioning and deviation correction mechanism 4, completes the precise positioning of the vehicle body, and then lifts the vehicle body through the lifting mechanism 3. The vehicle body disengages from the vehicle body guiding vehicle 1, and the vehicle body guiding vehicle 1 drives away from the assembly station. Among them, the lifting mechanism 3 includes two lifting brackets 31. The two lifting brackets 31 are located on both sides of the vehicle body along the width direction X. By adjusting the trajectory of the lifting manipulator 32, the distance between the two lifting brackets 31 can be adjusted to achieve compatibility with vehicles of different widths. The lifting bracket 31 includes a moving positioning group 311 and a fixed positioning group 312 for supporting and positioning the vehicle body. The moving positioning group 311 can move along the length direction Y (the vehicle wheelbase direction). By adjusting the position of the moving positioning group 311, the fixed positioning group 312 and the moving positioning group 311 can form multiple groups of positioning combinations to achieve compatibility with vehicles of different wheelbases.

[0115] The battery guiding vehicle 2 transports the power battery to the assembly station, completes the pre-positioning of the power battery, performs positioning and deviation correction on the power battery through the positioning and deviation correction mechanism 4, and completes the precise positioning of the vehicle body. At the same time, the positioning and deviation correction mechanism 4 can lift the power battery, the power battery is separated from the battery guiding vehicle 2, and the battery guiding vehicle 2 drives away from the assembly station. In this embodiment, the vehicle body and the power battery share a positioning and deviation correction mechanism 4 for precise positioning, so that the vehicle body and the power battery are in the same position in the width direction X and the length direction Y, and the positioning accuracy requirement of accurately positioning the power battery to the vehicle body is realized. Among them, in order to protect the power battery and prevent the power battery from being damaged, the power battery is always placed on the tray 6 during transportation and positioning and deviation correction.

[0116] The lifting manipulator 32 lowers the vehicle body to the position where it cooperates with the power battery. The tightening manipulator 51 controls the floating connecting rod 52 to align with the mounting holes of the power battery and the vehicle body. A tightening gun is installed on the tightening manipulator 51, and the tightening gun controls the fasteners to connect the power battery and the vehicle body. This embodiment adopts an automatic assembly process, reduces on-site operators, and improves the general assembly efficiency. Among them, the components included in the floating tightening mechanism 5 are all existing components. The floating connecting rod 52 is installed on the tray 6 for placing the power battery. Specifically, 10 floating connecting rods 52 can be arranged on the tray 6 to meet the positioning requirements for the bolts of 5 types of power batteries to float into the holes.

[0117] Drive the vehicle body guiding vehicle 1 back to the assembly station. The positioning and deviation correction mechanism 4 and the lifting mechanism 3 lower the assembled vehicle body and power battery to the vehicle body guiding vehicle 1. The vehicle body guiding vehicle 1 drives away from the assembly station to complete the assembly of the vehicle body and the power battery. This embodiment only uses one assembly station to assemble the vehicle body and the power battery, and occupies a small area.

[0118] As Figure 2 shown, in some embodiments, the mobile positioning group 311 includes a first driving member 311a, a mobile support block 311b, and at least two groups of first positioning members 311c. The first driving member 311a can drive the mobile support block 311b and at least two groups of first positioning members 311c to move along the length direction Y to adjust the positions of the mobile support block 311b and at least two groups of first positioning members 311c relative to the vehicle body. Among at least two groups of first positioning members 311c, at least one group of first positioning members 311c can cooperate with the vehicle body.

[0119] In this embodiment, the first driving member 311a can be a cylinder. The lifting bracket 31 includes a bracket body 313. The moving positioning group 311 and the fixed positioning group 312 are installed on the bracket body 313. The bracket body 313 is provided with a connecting flange 313a, and the connecting flange 313a is connected to the lifting manipulator 32. The bracket body 313 is provided with a second slide rail 313b and a bottom plate 313c. The bottom plate 313c cooperates with the second slide rail 313b and can move relative to the second slide rail 313b. The moving support block 311b and at least two groups of first positioning members 311c are installed on the bottom plate 313c. The driving end of the first driving member 311a is connected to the bottom plate 313c, so that the first driving member 311a can drive the bottom plate 313c to move along the second slide rail 313b, so as to drive the moving support block 311b and at least two groups of first positioning members 311c to move, so that the moving support block 311b and at least two groups of first positioning members 311c can move to corresponding positions according to the vehicle model. Among them, the at least two groups of first positioning members 311c are arranged at different positions, and the first positioning members 311c adapted to the vehicle model structure can be selected according to the vehicle model. For example, one group of the first positioning members 311c can be selected, or two groups of the first positioning members 311c can be selected, etc. This embodiment does not make specific limitations here.

[0120] Specifically, as Figure 2 shown, each group of first positioning members 311c includes a positioning pin 311c1 and a lifting cylinder 311c2. The lifting cylinder 311c2 can drive the positioning pin 311c1 to lift and lower along the height direction Z. In this embodiment, which group of first positioning members 311c works can be controlled according to the vehicle model structure information obtained by the control system, so that the lifting cylinder 311c2 of which group pushes the positioning pin 311c1 to rise to cooperate with the vehicle body.

[0121] As Figure 2 shown, in some embodiments, the fixed positioning group 312 includes a fixed support block 312a and at least three groups of second positioning members 312b. Among the at least three groups of second positioning members 312b, at least one group of second positioning members 312b can cooperate with the vehicle body.

[0122] In this embodiment, the at least three groups of second positioning members 312b are arranged at different positions, and the second positioning members 312b adapted to the vehicle model structure can be rotated according to the vehicle model. For example, one group of the second positioning members 312b can be selected, or two groups of the second positioning members 312b can be selected, or three groups of the second positioning members 312b can be selected, etc. This embodiment does not make specific limitations here.

[0123] Specifically, as Figure 2As shown in the figure, each group of second positioning members 312b includes a positioning pin 311c1 and a lifting cylinder 311c2. The lifting cylinder 311c2 can drive the positioning pin 311c1 to lift and lower along the height direction Z. In this embodiment, which group of second positioning members 312b works can be controlled according to the vehicle model structure information obtained by the control system, so that the lifting cylinder 311c2 of which group can push the positioning pin 311c1 to rise to cooperate with the vehicle body.

[0124] In this embodiment, at least one positioning pin 311c1 in the moving positioning group 311 and at least one positioning pin 311c1 in the fixed positioning group 312 are combined with each other to form multiple groups of positioning groups. By designing multiple groups of positioning pins 311c1 and combining them according to different vehicle models and different vehicle body hole positions, different vehicle body positioning requirements can be met.

[0125] In some embodiments, such as Figure 2 As shown in the figure, the lifting mechanism 3 further includes a signal control module 33 and a valve island group 34. The signal control module 33 and the valve island group 34 are installed on the lifting bracket 31. The signal control module 33 is used to receive the signal sent by the control system and control the valve island group 34 to open the valve of the lifting cylinder 311c2 corresponding to the required positioning pin 311c1. The signal control module 33 can also receive the in-place signal sent by the lifting cylinder 311c2 and feedback it to the control system.

[0126] In this embodiment, the control system analyzes the vehicle body structure information and sends a signal to the signal control module 33. The signal control module 33 knows the moving positions of the moving support block 311b and the first positioning member 311c according to the signal and determines which group of positioning pins 311c1 works. The information control module 33 controls the valve island group 34 to open the valve of the lifting cylinder 311c2 of the required positioning pin 311c1, so that the lifting cylinder 311c2 pushes the positioning pin 311c1 to rise to cooperate with the vehicle body, realizing the positioning of the vehicle body.

[0127] Such as Figure 3 and Figure 4 As shown in the figure, in some embodiments, the jacking assembly 42 includes a second driving member 421, a driving pull rod 422 and a jacking member 423. The positioning assembly 43 is connected to the jacking member 423. The second driving member 421 can drive the driving pull rod 422 to move along the length direction Y. The driving pull rod 422 can push the jacking member 423 to move along the height direction Z. The jacking member 423 can drive the positioning assembly 43 to move along the height direction Z.

[0128] In this embodiment, the second driving member 421 can be a cylinder. The driving end of the second driving member 421 is connected to the driving pull rod 422, and the driving pull rod 422 cooperates with the jacking member 423. After the second driving member 421 pushes the driving pull rod 422, the driving pull rod 422 can push the jacking member 423 to rise, so that the jacking member 423 can jack up the vehicle body or the tray 6 of the power battery. At the same time, the jacking member 423 drives the positioning assembly 43 to rise and position the vehicle body or the power battery.

[0129] Among them, since the positioning and deviation correction mechanism 4 positions and corrects the deviation of the vehicle body and the power battery respectively, after the positioning and deviation correction mechanism 4 completes the positioning and deviation correction work on the vehicle body, the jacking member 423 and the positioning assembly 43 can return to the initial position for subsequent work.

[0130] Specifically, as Figure 5 and Figure 6 shown, the driving pull rod 422 is provided with a driving inclined surface 422a. The jacking member 423 includes a jacking column 423a and a roller 423b. The roller 423b is installed below the jacking column 423a and can rotate relative to the jacking column 423a. When the driving pull rod 422 moves along the length direction Y, the roller 423b can move along the driving inclined surface 422a.

[0131] As Figure 6 and Figure 7 shown, in this embodiment, the driving pull rod 422 is provided with a jacking block 422b, and the driving inclined surface 422a is arranged on the jacking block 422b. After the second driving member 421 pushes the driving pull rod 422, the jacking block 422b moves towards the roller 423b, so that the roller 423b can rotate along the driving inclined surface 422a to push the jacking member 423 to rise. Among them, the jacking block 422b is also provided with a flat surface 422b1, and the flat surface 422b1 is connected to the driving inclined surface 422a. When the jacking member 423 rises in place, the roller 423b can move along the driving inclined surface 422a to the flat surface 422b1, which plays a supporting role for the jacking member 423. The jacking block 422b is also provided with a limiting block 422b2. The limiting block 422b2 is located at one end of the flat surface 422b1 away from the driving inclined surface 422a and can limit the roller 423b from falling off the flat surface 422b1.

[0132] More specifically, two positioning and deviation correction mechanisms 4 are provided, and the two positioning and deviation correction mechanisms 4 are distributed along the width direction X. Along the length direction Y, at least two cooperating jacking blocks 422b and jacking members 423 are provided in the jacking assembly 42. The positioning assembly 43 is arranged close to one of the jacking members 423, and among the two positioning and deviation correction mechanisms 4, the two positioning assemblies 43 are arranged diagonally to improve the positioning accuracy. In addition, the positioning and deviation correction mechanism 4 designed in this embodiment has a simple structure and is convenient for maintenance and repair.

[0133] Furthermore, as Figure 6 andFigure 7 As shown, the lifting member 423 is further provided with a lifting sphere 423c. The lifting sphere 423c is installed above the lifting column 423a and can rotate relative to the lifting column 423a. The lifting sphere 423c can respectively lift the vehicle body and the power battery, so that the positioning assembly 43 can respectively position and correct the deviation of the vehicle body and the power battery.

[0134] In this embodiment, when the positioning assembly 43 cooperates with the vehicle body and the power battery respectively, it may be necessary to correct and adjust the positions of the vehicle body and the power battery, causing the positions of the vehicle body and the power battery to move. In this embodiment, the vehicle body and the power battery are supported by the lifting sphere 423c. When the vehicle body and the power battery move, the lifting sphere 423c is in rolling contact with the vehicle body and the power battery, reducing the friction between the lifting member 423 and the vehicle body and between the lifting member 423 and the power battery.

[0135] Furthermore, as Figure 6 and Figure 7 shown, the bracket 41 includes a column 411. The column 411 is provided with a first slide rail 411a. The lifting column 423a is provided with a slider 423a1. The slider 423a1 is installed on the first slide rail 411a and can move along the first slide rail 411a. The column 411 is further provided with a limiting portion 411b. The slider 423a1 is located between the limiting portions 411b to prevent the lifting member 423 from detaching from the bracket 41.

[0136] In this embodiment, the lifting column 423a is installed on the first slide rail 411a of the column 411 through the slider 423a1. Through the sliding cooperation between the slider 423a1 and the first slide rail 411a, the lifting column 423a can move along the column 411 while being installed on the column 411, realizing the supporting effect on the lifting column 423a.

[0137] Among them, to prevent the column 411 from restricting the movement of the driving pull rod 422, the column 411 can be arranged on the side of the driving pull rod 422, and the column 411 is provided with an avoidance portion that can avoid the movement of the driving pull rod 422.

[0138] As Figure 4 and Figure 5 shown, the lifting assembly 42 further includes a position sensor 424. The driving pull rod 422 is provided with a sensed portion 422c. The position sensor 424 can sense the position of the sensed portion 422c to determine the position of the lifting member 423.

[0139] In this embodiment, during the process of the driving pull rod 422 being pushed, the position sensor 424 can detect the position of the sensed portion 422c to determine the positions of the lifting member 423 and the positioning assembly 43, and feedback the position information to the control system to facilitate subsequent operations of lifting or lowering the lifting member 423 and the positioning assembly 43.

[0140] As Figure 6 shown, in some embodiments, the positioning assembly 43 includes a guiding and positioning member 431 and a lifting cylinder 432, and the lifting cylinder 432 is capable of driving the guiding and positioning member 431 to move up and down in the height direction Z.

[0141] In this embodiment, before the lifting member 423 lifts the vehicle body or the power battery, the guiding and positioning member 431 is in a contracted state. After the lifting member 423 lifts the vehicle body or the power battery, the lifting cylinder 432 pushes the guiding and positioning member 431 to rise until it is engaged with the positioning hole of the vehicle body or the power battery (the tray 6 thereof), so as to position the vehicle body or the power battery.

[0142] Among them, as Figure 6 shown, the guiding and positioning member 431 includes a connected guiding portion 431a and a positioning and deviation-correcting portion 431b. In the direction away from the guiding portion 431a, the cross-sectional area of the positioning and deviation-correcting portion 431b gradually increases. In this embodiment, the guiding portion 431a can guide the guiding and positioning member 431, facilitating the insertion of the guiding and positioning member 431 into the positioning hole of the vehicle body or the power battery (the tray 6 thereof). As the guiding and positioning member 431 rises, the positioning and deviation-correcting portion 431b gradually enters the positioning hole, and adjusts the position of the vehicle body or the power battery by pressing against the side wall of the positioning hole, so as to meet the requirement of precise positioning of the vehicle body and the power battery. Among them, the outer surface of the positioning and deviation-correcting portion 431b can be an inclined surface or a curved surface.

[0143] This embodiment also provides a method for assembling power batteries. Using the above-mentioned power battery assembling system, the assembling method includes: controlling the vehicle body guiding vehicle 1 to carry the vehicle body to the assembling station; controlling the positioning and deviation-correcting mechanism 4 to position and correct the deviation of the vehicle body; controlling the lifting mechanism 3 to lift the vehicle body; controlling the vehicle body guiding vehicle 1 to drive away from the assembling station; controlling the battery guiding vehicle 2 to carry the power battery to the assembling station; controlling the positioning and deviation-correcting mechanism 4 to position and correct the deviation of the power battery; controlling the battery guiding vehicle 2 to drive away from the assembling station; controlling the lifting mechanism 3 to lower the vehicle body to the position where it cooperates with the power battery; controlling the tightening manipulator 51 to tighten the fasteners; controlling the vehicle body guiding vehicle 1 to drive into the assembling station, and the vehicle body and the power battery fall onto the vehicle body guiding vehicle 1; controlling the vehicle body guiding vehicle 1 to drive away from the assembling station.

[0144] In this embodiment, the carrier guiding vehicle transports the vehicle body to the assembly station, completes the pre-positioning of the vehicle body, performs positioning and deviation correction on the vehicle body through the positioning deviation correction mechanism 4, completes the precise positioning of the vehicle body, then lifts the vehicle body through the lifting mechanism 3, the vehicle body detaches from the vehicle body guiding vehicle 1, and the vehicle body guiding vehicle 1 drives away from the assembly station. The battery guiding vehicle 2 transports the power battery to the assembly station, completes the pre-positioning of the power battery, performs positioning and deviation correction on the power battery through the positioning deviation correction mechanism 4, and completes the precise positioning of the vehicle body. At the same time, the positioning deviation correction mechanism 4 can lift the power battery, the power battery detaches from the battery guiding vehicle 2, and the battery guiding vehicle 2 drives away from the assembly station. The lifting manipulator 32 lowers the vehicle body to the position where it mates with the power battery, and the tightening manipulator 51 controls the floating connecting rod 52 to align with the mounting holes of the power battery and the vehicle body, and controls the fasteners to connect the power battery and the vehicle body. The vehicle body guiding vehicle 1 drives back to the assembly station, and the positioning deviation correction mechanism 4 and the lifting mechanism 3 lower the assembled vehicle body and power battery onto the vehicle body guiding vehicle 1, and the vehicle body guiding vehicle 1 drives away from the assembly station, completing the assembly of the vehicle body and the power battery.

[0145] In this embodiment, the vehicle body and the power battery are carried to the assembly station by the AGV to achieve the pre-positioning of the vehicle body and the power battery. The positioning deviation correction mechanism 4 positions and corrects the stop positions of the vehicle body and the power battery respectively to ensure the assembly accuracy of the vehicle body and the power battery; it breaks through the process mode of the traditional co-assembly production line, only occupies the position of one assembly station, and realizes the automated working process of positioning, co-assembly and fixing of the vehicle body and the power battery, with high integration and high positioning accuracy.

[0146] The above are only the preferred embodiments of the present application and are not used to limit the present application. For those skilled in the art, various changes and modifications can be made to the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A power battery assembly system for assembling a vehicle body and a power battery, characterized in that, the power battery assembly system includes: a vehicle body guiding vehicle for delivering the vehicle body to an assembly station; a battery guiding vehicle for delivering the power battery to the assembly station; a lifting mechanism located at the assembly station, the lifting mechanism being used for lifting and lowering the vehicle body, the lifting mechanism including a lifting bracket, the lifting bracket being provided with a moving positioning group and a fixed positioning group, the moving positioning group being capable of moving relative to the lifting bracket in the length direction, and the fixed positioning group and the moving positioning group being capable of forming multiple groups of positioning combinations; a positioning and deviation correction mechanism located at the assembly station, the positioning and deviation correction mechanism being used for respectively positioning the vehicle body and the power battery, the positioning and deviation correction mechanism including a bracket and a jacking assembly and a positioning assembly mounted on the bracket, the jacking assembly being capable of driving the positioning assembly to move in the height direction; the jacking assembly includes a second driving member, a driving pull rod and a jacking member, the positioning assembly being connected to the jacking member; the second driving member is capable of driving the driving pull rod to move in the length direction, the driving pull rod is capable of pushing the jacking member to move in the height direction, and the jacking member is capable of driving the positioning assembly to move in the height direction; the driving pull rod is provided with a driving inclined surface, the jacking member includes a jacking column and a roller, the roller is mounted below the jacking column and is capable of rotating relative to the jacking column, and when the driving pull rod moves in the length direction, the roller is capable of moving along the driving inclined surface; the jacking member is further provided with a jacking sphere, the jacking sphere is mounted above the jacking column and is capable of rotating relative to the jacking column, and the jacking sphere is capable of respectively jacking up the vehicle body and the power battery so that the positioning assembly can respectively position and correct the deviation of the vehicle body and the power battery; the bracket includes a column, the column is provided with a first slide rail, the jacking column is provided with a slider, the slider is mounted on the first slide rail and is capable of moving along the first slide rail; the positioning assembly includes a guiding and positioning member and a jacking cylinder, the jacking cylinder being capable of driving the guiding and positioning member to lift and lower in the height direction; the guiding and positioning member includes a connected guiding portion and a positioning and deviation correction portion, and in the direction away from the guiding portion, the cross-sectional area of the positioning and deviation correction portion gradually increases.

2. The power battery assembly system according to claim 1, characterized in that, the moving positioning group includes a first driving member, a moving support block and at least two groups of first positioning members; the first driving member is capable of driving the moving support block and at least two groups of the first positioning members to move in the length direction to adjust the positions of the moving support block and at least two groups of the first positioning members relative to the vehicle body; among at least two groups of the first positioning members, at least one group of the first positioning members can cooperate with the vehicle body.

3. The power battery assembly system according to claim 2, characterized in that, each group of the first positioning members includes a positioning pin and a lifting cylinder, the lifting cylinder being capable of driving the positioning pin to lift and lower in the height direction.

4. The power battery assembly system according to claim 1, It is characterized in that The fixed positioning group includes a fixed support block and at least three groups of second positioning members; Among the at least three groups of the second positioning members, at least one group of the second positioning members can cooperate with the vehicle body.

5. The power battery assembly system according to claim 4, It is characterized in that Each group of the second positioning members includes a positioning pin and a lifting cylinder, and the lifting cylinder can drive the positioning pin to rise and fall in the height direction.

6. The power battery assembly system according to claim 3 or 5, It is characterized in that The lifting mechanism further comprises a signal control module and a valve island group, wherein the signal control module and the valve island group are installed on the lifting bracket; The signal control module is used to receive the signal sent by the control system and control the valve island group to open the valve of the lifting cylinder corresponding to the required positioning pin; The signal control module can also receive the arrival signal sent by the lifting cylinder and feed it back to the control system.

7. The power battery assembly system according to claim 1, It is characterized in that The column is also provided with a limiting portion, and the sliding block is located between the limiting portions to limit the lifting member from being separated from the bracket.

8. The power battery assembly system according to claim 1, It is characterized in that The lifting assembly further comprises a position sensor, and the driving rod is provided with a sensed portion; The position sensor can sense the position of the sensed portion to determine the position of the lifting member.

9. The power battery assembly system according to claim 1, It is characterized in that The power battery assembly system also includes a floating tightening mechanism; The floating tightening mechanism comprises a tightening manipulator and a plurality of floating connecting rods, wherein the plurality of floating connecting rods are mounted on a tray on which the power battery is placed, and fasteners are placed in the floating connecting rods; The tightening manipulator can drive the floating connecting rod to align the fastener with the mounting holes of the vehicle body and the power battery, and drive the fastener to connect the vehicle body and the power battery.

10. A power battery assembly method, It is characterized in that The power battery assembly system according to any one of claims 1 to 9 is adopted, and the assembly method comprises: Control the vehicle body to guide the vehicle body to the assembly station; Controlling the positioning and deviation-correcting mechanism to position and correct the vehicle body; Controlling the lifting mechanism to lift the vehicle body; Controlling the vehicle body guide vehicle to drive away from the assembly station; Control the battery to guide the vehicle-mounted power battery to the assembly station; Controlling the positioning and deviation correction mechanism to position and correct the power battery; Controlling the battery guide vehicle to drive away from the assembly station; Controlling the lifting mechanism to lower the vehicle body to a position matching with the power battery; Control the tightening robot to tighten the fasteners; Controlling the vehicle body guide vehicle to drive into the assembly station, and the vehicle body and the power battery fall onto the vehicle body guide vehicle; The vehicle body guide vehicle is controlled to drive away from the assembly station.

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