Stacked battery box precision assembly equipment with stress compensation function

Abstract

The present application relates to the technical field of battery box assembly, in particular to a precise assembly equipment for a stacked battery box with stress compensation function, comprising an operation frame, an initial assembly mechanism is arranged at the top end inside the operation frame, and an advanced splicing mechanism is arranged at the middle and lower end inside the operation frame, wherein the initial assembly mechanism comprises two groups of L-shaped clamping frames arranged symmetrically front and back, and a rotating rod is arranged at the center of each side of the L-shaped clamping frame, and the rotating rod is slidably connected to the inside of the horizontal groove arranged on the inner wall of the operation frame at the end away from the L-shaped clamping frame; through the synergistic effect of self-adaptive clamping, multi-stage limiting and dynamic stacking, the high-precision, low-stress and high-efficiency assembly effect of the stacked battery box is realized, and the assembly efficiency and practicality of the stacked battery box are effectively improved by being compatible with battery boxes of different specifications.

Description

Technical Field

[0001] This invention relates to the field of battery box assembly technology, specifically to a precision assembly device for stacked battery boxes with stress compensation function. Background Technology

[0002] Stacked battery pack assembly equipment, as a key piece of equipment in the field of new energy power battery pack manufacturing, shoulders the important task of building a high-safety, long-life battery system. Taking the electric vehicle industry as an example, during the assembly of power battery packs, the battery pack must withstand the expansion and contraction stress caused by cyclic charging and discharging, the vibration and impact during vehicle operation, and the thermal expansion and contraction under different temperature environments, etc., to ensure the stability of electrical connection between battery cells and the integrity of the structure.

[0003] However, current assembly equipment has significant technical deficiencies in terms of precision control and stress regulation:

[0004] First, during the battery box stacking process, the lack of pretreatment before stacking individual battery boxes can easily affect the splicing and assembly of the entire battery box group due to poor sealing of the individual battery boxes or bulging of the box cover.

[0005] Secondly, after the battery boxes are stacked, the stress generated during the stacking process is often not effectively compensated, which can lead to loose connections between the battery boxes and thus affect the overall performance and safety of the battery system.

[0006] To address the aforementioned technical deficiencies, and in order to improve battery box assembly accuracy, reduce interface residual stress, and achieve multi-specification compatible production, an improved scheme combining adaptive clamping, multi-level limiting, and dynamic pressure compensation is proposed. By integrating a precision mechanical structure, a stacked battery box precision assembly device with stress compensation function is formed to avoid battery pack safety hazards caused by uncontrolled assembly stress. Summary of the Invention

[0007] The purpose of this invention is to achieve high-precision, low-stress, and high-efficiency assembly of stacked battery boxes through the synergistic effect of adaptive clamping, multi-level limiting, and dynamic stacking. Furthermore, by being compatible with battery boxes of different specifications, it effectively improves the assembly efficiency and practicality of stacked battery boxes.

[0008] The objective of this invention can be achieved through the following technical solution: a precision assembly equipment for stacked battery boxes with stress compensation function, including an operation frame, wherein a primary assembly mechanism is provided at the top of the operation frame, and an advanced splicing mechanism is provided at the middle and lower part of the operation frame.

[0009] The first-stage assembly mechanism comprises two groups of L-shaped clamping frames arranged symmetrically front and back, and a rotating rod is arranged at the center of the two sides of each L-shaped clamping frame, and the rotating rod is slidingly connected to the horizontal groove arranged on the inner side wall of the operation frame, one group of the rotating rods is rotatably connected to the outer wall of the L-shaped clamping frame, and the centers of the two groups of L-shaped clamping frames away from each other are fixedly installed with a stop plate, and the outer part of the two groups of stop plates is jointly sleeved with an inverted concave lifting frame, and a gas cylinder is jointly arranged between the top of the lifting frame and the inner wall of the top of the operation frame, and a clamping shaft is arranged at the center of the inner wall of the bottom of the lifting frame, and the clamping shaft is sleeved in the frame groove arranged in the inner part of the stop plate.

[0010] Further, a double-shaft motor is jointly arranged between the rotating rods at the movable ends of the two groups of L-shaped clamping frames, and the double-shaft motor is connected to the inner side wall of the operation frame through a machine base, and the front and rear output shafts of the double-shaft motor are fixedly installed with oppositely threaded screw guide rods, and the two groups of screw guide rods are respectively screw-penetrated in the corresponding rotating rods.

[0011] Further, the first-stage assembly mechanism further comprises a positioning frame arranged at the upper end of the two groups of L-shaped clamping frames and arranged in a horizontal L-shaped structure, and the open end of the positioning frame is fixedly connected to the inner side wall of the operation frame, and a single-shaft motor is arranged at the inner wall of the top of the positioning frame away from the open end, and a limiting cylinder is arranged at the bottom shaft of the single-shaft motor, and a ring groove is arranged at the middle segment of the outer wall of the limiting cylinder, and the ring groove is arranged in a V-shaped structure at the centers of the front and rear ends.

[0012] Further, a concave stop frame is hinged to the frame body away from the opening side of the positioning frame, and the open end frame body of the concave stop frame is arranged in an inclined surface, and a sliding shaft is fixedly installed at the center of the front and rear inner walls of the concave stop frame, and the two groups of sliding shafts are slidingly connected to the two groups of V-shaped grooves of the ring groove, and a stop piece is fixedly connected to the top surface of the concave stop frame through a connecting rod at the front and rear frame bodies, and the stop piece is 10 cm longer than the open end of the concave stop frame.

[0013] Further, the advanced splicing mechanism comprises a clamping frame fixedly installed at the middle segment of the operation frame and a fixing seat arranged at the inner wall of the bottom of the operation frame, and a matching material lifting frame is sleeved on the top of the fixing seat, and the top end of the material lifting frame extends to the inner wall of the clamping frame.

[0014] Further, long rods are hinged at the front and rear ends of the inner part of the clamping frame, and triangular clamping blocks are fixedly installed at the two ends of the outer part of the long rods, and a stop rod is fixedly installed at the top of the two groups of triangular clamping blocks in the same row and away from the front and rear inner walls of the clamping frame, and the two ends of the stop rod are fixedly connected to the two side walls of the clamping frame.

[0015] Further, the two ends of the inner wall of the top of the material frame are respectively fixedly provided with vertical frames, and the bottom of each vertical frame is rotatably connected with a double-shaft snap ring.

[0016] Further, the front end of the top surface of the fixed seat is provided with a double-shaft motor two, and the front and rear ends of the double-shaft motor two are fixedly connected with screw guide rods two with reverse threads, and the two groups of screw guide rods two are respectively sleeved with the sliding blocks arranged in the center of the wedge-shaped block.

[0017] Compared with the prior art, the present application has the following advantages:

[0018] 1. The present application is provided with a primary assembly mechanism, and two groups of L-shaped clamping frames are symmetrically arranged in front and back to position the single-layer battery box, and a double-shaft motor one drives screw guide rods one with reverse threads to realize self-adaptive adjustment of the distance between the two groups of L-shaped clamping frames.

[0019] In addition, the slope of the V-shaped groove converts the circular rotary motion into the linear sinking motion of the concave clamping frame, realizes automatic limiting, ensures the position accuracy of the battery box before entering the advanced splicing mechanism, and at the same time, the resistance piece synchronously sinks to the bottom surface of the battery box body, cooperates with the clamping force of the top of the L-shaped clamping frame, eliminates the floating gap caused by the self-weight or conveying vibration of the battery box, and assists the tight pressing of the box cover and the box body, which is beneficial to the precise stacking of multiple battery boxes.

[0020] 2. The present application is also provided with an advanced splicing mechanism, and the battery box is buffered and slides downward when pressing the triangular clamping block on the opposite end, so as to reduce the impact stress of falling; after the battery box is stably placed in the material frame, the triangular clamping block cannot be reset due to the limitation of the pressing rod, and the support state of the bottom of the battery box is maintained.

[0021] The wedge-shaped block is close to or away from, the slope of the wedge-shaped block cooperates with the double-shaft snap ring, pushes the material frame to sink, reserves space for the subsequent battery box, or lifts to force the whole stacked battery box to rise; when the stacking number is greater than or equal to 2 layers, the bottom of the top layer battery box presses the end of the triangular clamping block, the triangular clamping block cannot be turned over due to the limitation of the pressing rod, and downward pressure is applied to the top layer battery box, realizing automatic pressing without additional tools, and ensuring the tightness of the stacking. BRIEF DESCRIPTION OF DRAWINGS

[0022] In order to facilitate the understanding of those skilled in the art, the present application will be further described below with reference to the drawings.

[0023] Figure 1 The present application is a whole structure schematic diagram;

[0024] Figure 2is a half sectional view of the operation frame of the present application;

[0025] Figure 3 is a bottom sectional view of the operation frame of the present application;

[0026] Figure 4 is a partial structure schematic diagram of the primary assembly mechanism of the present application;

[0027] Figure 5 is a bottom sectional view of the operation frame of the present application;

[0028] Figure 6 is a three-dimensional schematic diagram of the advanced splicing mechanism of the present application;

[0029] Figure 7 is a plane schematic diagram of the overall structure of the present application.

[0030] In the figure: 1, operation frame; 2, primary assembly mechanism; 21, L-shaped clamping frame; 22, rotating rod; 23, abutting plate; 24, lifting frame; 241, clamping shaft; 25, air cylinder; 26, double-shaft motor one; 27, helical guide rod one; 28, positioning frame; 29, single-shaft motor; 210, limiting cylinder; 211, concave abutting frame; 212, sliding shaft; 213, abutting piece; 3, advanced splicing mechanism; 30, clamping position frame; 31, fixed seat; 32, material lifting frame; 33, long rod; 34, triangular clamping block; 35, abutting rod; 36, vertical frame; 37, double-shaft clamping ring; 38, wedge-shaped abutting block; 39, double-shaft motor two; 310, helical guide rod two; 311, sliding block. DETAILED DESCRIPTION

[0031] The technical solutions of the present application will be described clearly and completely below in conjunction with the embodiments. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0032] Embodiment one: please refer to Figure 1 - Figure 5 As shown, the stacked battery box precision assembly equipment with stress compensation function comprises an operation frame 1, the inside of the operation frame 1 is provided with a primary assembly mechanism 2 at the top end, and the inside of the operation frame 1 is provided with an advanced splicing mechanism 3 at the middle and lower end;

[0033] Wherein, the primary assembly mechanism 2 comprises two groups of L-shaped clamping frames 21 arranged symmetrically front and back, and a rotating rod 22 is arranged at the center of each side of the L-shaped clamping frame 21, and the rotating rod 22 is slidingly connected to the inside of the horizontal groove arranged at the inside wall of the operating frame 1, one of the rotating rods 22 is rotatably connected to the outer wall of the L-shaped clamping frame 21, and the center of the side of each L-shaped clamping frame 21 away from the other is fixedly installed with a stop plate 23, and the outer part of the two stop plates 23 is jointly sleeved with an inverted concave lifting frame 24, and a pneumatic cylinder 25 is arranged between the top of the lifting frame 24 and the inner wall of the top of the operating frame 1, a clamping shaft 241 is arranged at the center of the inner wall of the bottom of the lifting frame 24, and the clamping shaft 241 is sleeved in the frame groove arranged in the stop plate 23;

[0034] A double-shaft motor 26 is arranged between the rotating rods 22 at the movable ends of the two groups of L-shaped clamping frames 21, and the double-shaft motor 26 is connected to the inner side wall of the operating frame 1 through a machine base, and the front and rear output shafts of the double-shaft motor 26 are fixedly installed with oppositely threaded screw guide rods 27, and the two groups of screw guide rods 27 are respectively screwingly penetrated into the corresponding rotating rods 22.

[0035] Before assembling the battery box as a whole, the single-layer battery box body is first introduced from the opening of the operating frame 1, and is jointly received by the adjacent two groups of L-shaped clamping frames 21, and the distance between the two groups of L-shaped clamping frames 21 is adjusted according to the size of the battery box body, that is, the two groups of screw guide rods 27 are driven by the double-shaft motor 26 to rotate in the same direction, thereby pulling the adjacent two groups of rotating rods 22 and the adjacent two groups of L-shaped clamping frames 21 to move closer to each other to adapt to the size of the battery box, and the battery box is preliminarily positioned and righted by being clamped front and back;

[0036] It is worth noting that since the clamping shaft 241 is sleeved in the frame groove arranged in the stop plate 23, during the movement of the L-shaped clamping frame 21, the clamping shaft 241 moves relative to the stop plate 23 to maintain the stability of the L-shaped clamping frame 21;

[0037] In addition, by starting the pneumatic cylinder 25, the lifting frame 24 is pulled upward by the push rod, and the two groups of stop plates 23 are pressed downward respectively, thereby realizing the relative overturning of the L-shaped clamping frame 21, so as to drive the preliminarily positioned battery box to the next process.

[0038] Example two: please refer to Figure 3 - Figure 5 As shown in the figure, the primary assembly mechanism 2 further comprises a positioning frame 28 arranged at the upper end of the two groups of L-shaped clamping frames 21 and arranged in a horizontal L-shaped structure, and the opening end of the positioning frame 28 is fixedly connected to the inner side wall of the operating frame 1, a single-shaft motor 29 is arranged at the top inner wall of the positioning frame 28 away from the opening end, a limiting cylinder 210 is arranged at the bottom shaft of the single-shaft motor 29, an annular groove is arranged at the middle segment of the outer wall of the limiting cylinder 210, and the annular groove is arranged in a V-shaped structure at the center of the front and rear ends;

[0039] The positioning frame 28 is hinged with a concave resisting frame 211 at the frame body away from the opening side, and the opening end frame body of the concave resisting frame 211 is provided in a beveling surface, the centers of the front and rear inner walls of the concave resisting frame 211 are respectively fixedly installed with sliding shafts 212, the two groups of sliding shafts 212 are respectively slidingly connected at the two groups of V-shaped grooves of the ring groove, the top surfaces of the concave resisting frame 211 at the front and rear frame bodies are respectively fixedly connected with resisting plates 213 through connecting rods, and one end of the resisting plate 213 exceeds the opening end of the concave resisting frame 211 by 10 cm.

[0040] This embodiment is operated based on embodiment one, before the battery box is sent into the advanced splicing mechanism 3, the single-shaft motor 29 is started to drive the limiting cylinder 210 to rotate, it should be noted that in the initial state, the concave resisting frame 211 is in an inclined lifting state, so that the battery box can smoothly enter the L-shaped clamping frame 21, with the rotation of the limiting cylinder 210 and the relative sliding of the sliding shaft 212, when the two groups of sliding shafts 212 are simultaneously slidingly connected in the V-shaped grooves of the ring groove, the sliding shaft 212 is first settled in the V-shaped groove, and then slides to the bottom of the V-shaped groove, the concave resisting frame 211 is flipped and tends to be flat;

[0041] At this time, the two groups of resisting plates 213 are also synchronously settled through the connecting rod traction, the flipping process of the concave resisting frame 211 limits and presses one side of the battery box, further assisting the battery box in limiting and righting, and the two groups of resisting plates 213 press the bottom surface of the box body, assisting the box cover and the box body to be tightly pressed, avoiding the influence of the subsequent splicing between the box bodies due to the partial box cover being not tightly pressed during pressing;

[0042] With the continuous rotation of the limiting cylinder 210, the sliding shaft 212 is slidingly connected into the ring groove through the V-shaped groove, so as to reset the concave resisting frame 211 and the resisting plate 213, in order to perform subsequent pressing operation.

[0043] Embodiment three: please refer to Figure 1 、 Figure 6 and Figure 7 The advanced splicing mechanism 3 includes a clamping frame 30 fixedly installed at the middle section of the operation frame 1 and a fixed seat 31 provided at the bottom inner wall of the operation frame 1, the fixed seat 31 is sleeved with a matched top material frame 32, and the top end of the top material frame 32 extends to the inner wall of the clamping frame 30, the front and rear ends of the clamping frame 30 are respectively hinged with long rods 33, and the two ends of the long rods 33 are respectively fixedly installed with triangular clamping blocks 34, the top portions of the two groups of triangular clamping blocks 34 in the same row are fixedly installed with resisting rods 35 away from the front and rear inner walls of the clamping frame 30, and the two ends of the resisting rods 35 are fixedly connected with the two side walls of the clamping frame 30;

[0044] Two ends of the inner wall of the top of the material frame 32 are respectively fixedly provided with vertical frames 36, and the bottom of the vertical frame 36 is respectively connected with a double shaft clasp 37. The top surface of the fixed seat 31 is symmetrically connected with wedge-shaped blocks 38 at both ends, and the double shaft clasp 37 is sleeved on the higher end of the corresponding wedge-shaped block 38. The front end of the top surface of the fixed seat 31 is provided with a double shaft motor 39, and the front and rear ends of the double shaft motor 39 are respectively fixedly connected with screw guide rods 310 with reverse threads. The two groups of screw guide rods 310 are respectively screw-connected with sliding blocks 311 fixedly arranged at the center of the wedge-shaped block 38.

[0045] In the specific work, the battery box after preliminary treatment is discharged into the clamping frame 30, and the battery box is respectively pressed against the opposite ends of the front and rear rows of triangular clamping blocks 34 during the falling process, so that the triangular clamping blocks 34 and the long rod 33 are forced to overturn, so that the battery box is buffered and falls to the surface of the material frame 32 for stacking and placing.

[0046] Subsequently, the double shaft motor 39 is started to drive the two groups of screw guide rods 310 to rotate in the same direction, and under the action of the reverse threads, the two groups of sliding blocks 311 drive the wedge-shaped blocks 38 to move closer to or away from each other. When the wedge-shaped blocks 38 move closer to each other, the double shaft clasp 37 is pressed by the inclined surface and pulls the material frame 32 to sink, thereby reserving space for the subsequent battery box.

[0047] When the stacking quantity reaches two layers, on the basis of the above, the double shaft motor 39 is used to drive the two groups of wedge-shaped blocks 38 to move away from each other. Similarly, the double shaft clasp 37 is pressed by the inclined surface of the wedge-shaped block 38, so that the material frame 32 is lifted, thereby lifting the stacked two or more battery boxes. At this time, the battery box on the top is pressed against the end of the triangular clamping block 34. Since the bottom of the triangular clamping block 34 is provided with the stop rod 35, the overturning of the triangular clamping block 34 is prevented, and the downward pressure of the multiple triangular clamping blocks 34 on the battery box on the top is ensured, so that the stacked battery boxes are more tightly pressed, and the looseness of the stacked battery boxes is avoided.

[0048] It is worth mentioning that after the multiple battery boxes are stacked, the material frame 32 and the stacked battery boxes on the surface thereof are lowered to the outside of the clamping frame 30 by the above-mentioned method, so as to facilitate the taking of the material.

[0049] The design of the structure not only realizes the automatic stacking of the battery box, but also effectively guarantees the stability and tightness in the stacking process through the cooperation of the triangular clamping block 34 and the stop rod 35. In addition, the double shaft motor 39 drives the screw guide rod 310, and the sliding block 311 and the wedge-shaped block 38 are connected through the sliding connection, so as to realize the lifting adjustment of the material frame 32, thereby providing great convenience for the stacking and taking of the battery box.

[0050] Working principle: in use, first, the battery box to be assembled is sent into the operation frame 1 in sequence, the battery box is preliminarily positioned and righted by the primary assembly mechanism 2, in the process, the L-shaped clamping frame 21 is adjusted according to the size of the battery box, so that the battery box is stably clamped;

[0051] Subsequently, under the driving of the air cylinder 25, the lifting frame 24 moves upward and presses against the pressing plate 23, forcing the L-shaped clamping frame 21 to overturn, and the preliminarily positioned battery box is conveyed to the next process;

[0052] Before the battery box enters the advanced splicing mechanism 3, the single-shaft motor 29 is started, the limiting cylinder 210 is driven to rotate, the concave-shaped clamping frame 211 is overturned under the action of the limiting cylinder 210 and the sliding shaft 212, and one side of the battery box is limited and pressed, further assisting the battery box in limiting and righting, at the same time, the pressing piece 213 is pressed against the bottom surface of the battery box, ensuring that the cover and the body are tightly pressed together, and with the continuous rotation of the limiting cylinder 210, the concave-shaped clamping frame 211 and the pressing piece 213 are reset, preparing for the subsequent pressing operation;

[0053] When the battery box enters the advanced splicing mechanism 3, the battery box is buffered and positioned through the cooperation of the clamping frame 30 and the triangular clamping block 34, then the double-shaft motor 39 is started, the spiral guide rod 310 is driven to rotate, the sliding block 311 and the wedge-shaped clamping block 38 are connected in sliding mode, and the lifting frame 32 is adjusted in lifting; after the battery boxes are stacked, the lifting frame 32 and the battery boxes stacked on the surface thereof sink to the outside of the clamping frame 30, facilitating material taking, and in the whole process, the cooperation of the triangular clamping block 34 and the pressing rod 35 ensures the stability and tightness during stacking.

[0054] The preferred embodiments disclosed above are only used to help explain the present application. The preferred embodiments do not describe all the details and limit the application to the specific embodiments. Obviously, according to the content of the specification, many modifications and changes can be made. The specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the application, so that those skilled in the art can well understand and utilize the application. The application is limited by the claims and their entire scope and equivalents.

Claims

1. A precision assembly device for stacked battery boxes with stress compensation function, comprising an operation frame (1), characterized in that: The operation frame (1) is provided with a primary assembly mechanism (2) at the top and an advanced splicing mechanism (3) at the middle and lower ends. The primary assembly mechanism (2) includes two sets of L-shaped card frames (21) arranged symmetrically in front and behind. Rotating rods (22) are respectively provided at the center of both sides of the L-shaped card frames (21). The rotating rods (22) are slidably connected to the inside of the horizontal groove provided on the inner side wall of the operation frame (1) at the end away from the L-shaped card frames (21). One set of rotating rods (22) is rotatably connected to the outer wall of the L-shaped card frames (21). Abutment plates (23) are fixedly installed at the center of the two sets of L-shaped card frames (21) away from each other. An inverted concave lifting frame (24) is sleeved on the outside of the two sets of abutment plates (23). A cylinder (25) is provided between the top of the lifting frame (24) and the top inner wall of the operation frame (1). A locking shaft (241) is provided at the center of the bottom inner wall of the lifting frame (24). The locking shaft (241) is sleeved in the frame groove provided inside the abutment plate (23). The primary assembly mechanism (2) further includes a positioning frame (28) set at the upper end of the two sets of L-shaped card frames (21) and arranged in a horizontal L-shaped structure. The opening end of the positioning frame (28) is fixedly connected to the inner wall of the operation frame (1). A single-axis motor (29) is set at the top inner wall of the positioning frame (28) away from the opening end. A limiting cylinder (210) is set at the bottom shaft of the single-axis motor (29). An annular groove is set at the middle section of the outer wall of the limiting cylinder (210). The annular groove is arranged in a V-shaped structure at the center of the front and rear ends. The advanced splicing mechanism (3) includes a carding frame (30) fixedly installed in the middle section of the operation frame (1) and a fixed seat (31) set on the bottom inner wall of the operation frame (1). The top of the fixed seat (31) is fitted with a suitable top material frame (32), and the top of the top material frame (32) extends to the inner wall of the carding frame (30). The front and rear ends of the card slot frame (30) are respectively hinged to long rods (33), and triangular blocks (34) are fixedly installed at both ends of the long rods (33). The tops of the two sets of triangular blocks (34) in the same row and the ends away from the front and rear inner walls of the card slot frame (30) are fixedly installed with abutment rods (35), and the two ends of the abutment rods (35) are fixedly connected to the two side walls of the card slot frame (30).

2. The precision assembly equipment for stacked battery boxes with stress compensation function according to claim 1, characterized in that, A dual-axis motor (26) is provided between the rotating rods (22) at the movable ends of the two sets of L-shaped card frames (21), and the dual-axis motor (26) is connected to the inner side wall of the operating frame (1) through the base. The front and rear output shafts of the dual-axis motor (26) are respectively fixedly installed with spiral guide rods (27) with reverse threads. The two sets of spiral guide rods (27) are spirally inserted into the corresponding rotating rods (22).

3. The precision assembly equipment for stacked battery boxes with stress compensation function according to claim 1, characterized in that, The positioning frame (28) is hinged to a concave abutment frame (211) at the frame body away from the opening side, and the frame body at the opening end of the concave abutment frame (211) is set with a beveled surface. The center of the front and rear inner walls of the concave abutment frame (211) is fixedly installed with a sliding shaft (212). The two sets of sliding shafts (212) are slidably connected to the two sets of V-shaped grooves of the annular groove. The top surface of the concave abutment frame (211) is fixedly connected to abutment pieces (213) at the front and rear frames respectively by connecting rods, and one end of the abutment piece (213) extends 5-10 cm beyond the opening end of the concave abutment frame (211).

4. The precision assembly equipment for stacked battery boxes with stress compensation function according to claim 1, characterized in that, At both ends of the top inner wall of the top material frame (32), a vertical frame (36) is fixedly installed, and a double-axis retaining ring (37) is rotatably connected to the bottom of the vertical frame (36). At both ends of the top surface of the fixed seat (31), a wedge-shaped abutment (38) is symmetrically slidably connected, and the double-axis retaining ring (37) is sleeved on the higher end of the corresponding wedge-shaped abutment (38).

5. The precision assembly equipment for stacked battery boxes with stress compensation function according to claim 1, characterized in that, The top front end of the fixed base (31) is provided with a dual-axis motor (39), and the front and rear ends of the dual-axis motor (39) are respectively fixedly connected with a spiral guide rod (310) with reverse threads. The two sets of spiral guide rods (310) are respectively spirally connected to the slider (311) fixedly installed at the center of the wedge-shaped block (38).

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