Battery module stacking equipment

Abstract

The invention discloses battery module stacking equipment, and relates to the technical field of battery processing equipment, the battery module stacking equipment comprises a support frame and a stacking tool; the stacking tool is arranged on the supporting frame and comprises a stacking table, an end plate positioning mechanism, a battery cell positioning mechanism and a length pushing mechanism; wherein the end plate positioning mechanism is arranged on the stacking table and is configured to position an end plate assembly, and the end plate assembly comprises an end plate and at least one battery cell; the battery cell positioning mechanism is arranged on the stacking table and is configured to position two adjacent groups of battery cells and press the stacked battery modules; and the length pushing mechanism is arranged on the stacking table and is configured to push the end plate assembly to the end plate positioning mechanism and push the battery cell to the battery cell positioning mechanism. According to the technical scheme provided by the invention, the problem of low stacking and assembling precision of the battery modules can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of battery processing equipment, and in particular to a battery module stacking device. Background Art

[0002] With the rapid development of society, the demand for electric vehicles is increasing year by year. The energy of electric vehicles mainly comes from battery packs. The smallest unit of a battery pack is a battery cell, which is an energy storage unit. When multiple battery cells are packaged together in the same shell frame and connected to the outside through a unified boundary, they become a battery module. When several battery modules are controlled or managed by BMS (battery management system) and thermal management system, this unified whole is a battery pack, and the process of placing multiple battery cells in the same shell is called the stacking process of battery modules.

[0003] In the related art, a robot cell gripper grabs the cell and places it on a stacking ramp buffer table, and then the stacking ramp gripper grabs the cell from the buffer table to complete the stacking. However, the position of the cell to the buffer table is different each time, resulting in low assembly accuracy of battery module stacking. Summary of the invention

[0004] In view of the above problems, the present application provides a battery module stacking device, aiming to solve the problem of low assembly accuracy of battery module stacking.

[0005] The present application provides a battery module stacking device, including a support frame and a stacking tool; the stacking tool is arranged on the support frame, and the stacking tool includes a stacking platform, an end plate positioning mechanism, a battery cell positioning mechanism and a length pushing mechanism; wherein the end plate positioning mechanism is arranged on the stacking platform, and is configured to position the end plate assembly, the end plate assembly includes an end plate and at least one battery cell; the battery cell positioning mechanism is arranged on the stacking platform, and is configured to position two adjacent groups of battery cells and press the stacked battery module; the length pushing mechanism is arranged on the stacking platform, and is configured to push the end plate assembly toward the end plate positioning mechanism, and push the battery cell toward the battery cell positioning mechanism; the end plate positioning mechanism is configured to be arranged on the first side The end plate assembly is positioned in the first direction and the second direction; the end plate positioning mechanism includes a first centering mechanism, a first clamping mechanism and a second clamping mechanism; the first centering mechanism is configured to position the battery cell of the end plate assembly in the first direction; the first clamping mechanism is arranged on one side of the first centering mechanism and is configured to position the end plate in the second direction; the second clamping mechanism is arranged on a side of the first centering mechanism away from the first clamping mechanism and is configured to position the battery cell of the end plate assembly in the second direction; the end plate positioning mechanism also includes a positioning member, which is arranged below the first centering mechanism and is configured to be inserted into the notch of the end plate to position the end plate in the first direction and the second direction.

[0006] In the technical solution of the embodiment of the present application, the technical solution of the present application adopts a battery module stacking device to achieve the stacking of battery modules. In the first step, the end plate assembly is first placed on the stacking table, and the length pushing mechanism is used to push the end plate assembly toward the end plate positioning mechanism, so that the end plate positioning mechanism is used to position the end plate assembly; in the second step, the next group of battery cells is placed on the stacking table, and the length pushing mechanism is used to push the battery cells toward the battery cell positioning mechanism, so that the battery cells on the end plate assembly and the next group of battery cells are positioned by the battery cell positioning mechanism, that is, the two adjacent groups of battery cells are positioned by the battery cell positioning mechanism, and the battery cell positioning mechanism is used to press the stacked battery module to make the two adjacent groups of battery cells fit together, and the second step is repeated according to the number of battery cells in the battery module; when there are enough battery cells in the stack, the last group of end plate assemblies is finally placed on the stacking table, and the length pushing mechanism is used to push the last group of end plate assemblies toward the battery cell positioning mechanism, so that the last group of end plate assemblies are positioned by the battery cell positioning mechanism, and the battery cell positioning mechanism is used to press the stacked battery module, and finally the stacking of the entire battery module is completed. Therefore, the battery module stacking equipment provided in the present application directly places the end plate assembly and the battery cells on the stacking table, and then adopts the cooperation of the end plate positioning mechanism, the battery cell positioning mechanism and the length pushing mechanism to realize the automatic stacking of the battery modules. There is no need to first place the battery cells on the stacking ramp cache table, and then use the stacking ramp clamp to grab the battery cells from the cache table to complete the stacking, thereby reducing the size ring to improve the flatness of the bottom and side of the battery cell, thereby improving the assembly accuracy. In addition, the end plate positioning mechanism can be used to position the end plate assembly in the X-axis and Z-axis directions to improve the bottom and side flatness of the end plate assembly, which can improve the positioning accuracy of the end plate assembly; the first centering mechanism can be used to position the battery cell of the end plate assembly in the first direction, and then the end plate assembly is centered in the first direction to improve the side flatness of the end plate assembly; at the same time, the first clamping mechanism and the second clamping mechanism can be used to position the end plate and the battery cell in the second direction respectively to press the end plate assembly against the table surface of the stacking table, so that the end plate assembly is tightly attached to the table surface of the stacking table to improve the bottom flatness of the end plate assembly. In addition, when the length pushing mechanism pushes the end plate assembly toward the end plate positioning mechanism, the positioning piece is first inserted into the notch of the end plate to pre-position the end plate in the first direction and the second direction, and then the end plate assembly is re-positioned by the first centering mechanism, the first clamping mechanism and the second clamping mechanism, which can further improve the positioning accuracy of the end plate assembly.

[0007] In some embodiments, the battery cell positioning mechanism is configured to position two adjacent groups of battery cells in the first direction and the second direction, and to press the stacked battery module in the third direction; the length pushing mechanism is configured to push the end plate assembly and the battery cells in the third direction; the first direction, the second direction, and the third direction are arranged at angles to each other. With such a design, the battery cell positioning mechanism can be used to position two adjacent groups of battery cells in the X-axis and Z-axis directions to improve the bottom and side flatness of the two adjacent groups of battery cells, and the positioning accuracy of the two adjacent groups of battery cells can be improved. In addition, by using the battery cell positioning mechanism to press the stacked battery module in the Y-axis direction, and using the length pushing mechanism to push the end plate assembly and the battery cells in the Y-axis direction, the positioning effect of the end plate assembly and the battery cells can be not affected during the pushing and pressing process, thereby achieving high positioning accuracy and automated stacking effects at the same time.

[0008] In some embodiments, the positioning member can be extended and retracted in the second direction. With such a design, when the length pushing mechanism pushes the end plate assembly toward the end plate positioning mechanism, the positioning member extends in the second direction into the notch of the end plate to pre-position the end plate, and after stacking is completed, the positioning member can be retracted in the second direction to escape from the notch of the end plate, making it easier to remove the stacked battery module.

[0009] In some embodiments, the first centering mechanism includes a first driving member and two first baffles arranged opposite to each other, the first baffle is connected to the first driving member by transmission, and the first driving member drives the two first baffles to move closer to each other or farther away from each other to clamp or release the battery cells of the end plate assembly in the first direction. With such a design, when the two first baffles are driven to move closer to each other by the first driving member, the battery cells of the end plate assembly can be clamped by the two first baffles to center the end plate assembly; when the two first baffles are driven to move away from each other by the first driving member, the two first baffles release the end plate assembly to facilitate the removal of the stacked battery module.

[0010] In some embodiments, the first clamping mechanism includes a second driving member and a first clamping member, the first clamping member is connected to the second driving member by transmission, and the second driving member drives the first clamping member to rise and fall to clamp or release the end plate in the second direction. With such a design, when the first clamping member is driven down by the second driving member, the end plate can be pressed against the table surface of the stacking table in the second direction by the first clamping member to improve the bottom flatness of the end plate; when the first clamping member is driven up by the second driving member, the first clamping member releases the end plate to facilitate the removal of the stacked battery module.

[0011] In some embodiments, the second clamping mechanism includes a third driving member and a second clamping member, the second clamping member is connected to the third driving member by transmission, and the third driving member drives the second clamping member to rise and fall, so as to clamp or release the battery cells of the end plate assembly in the second direction. With such a design, when the second clamping member is driven down by the third driving member, the battery cells of the end plate assembly can be clamped on the table surface of the stacking table in the second direction by the second clamping member, so as to improve the bottom flatness of the battery cells; when the second clamping member is driven up by the third driving member, the second clamping member releases the battery cells, so as to facilitate the removal of the stacked battery module.

[0012] In some embodiments, the cell positioning mechanism includes a second centering mechanism, a third clamping mechanism and a large surface pushing mechanism; the second centering mechanism is configured to position two adjacent groups of cells in the first direction; the third clamping mechanism is arranged on one side of the second centering mechanism and is configured to position two adjacent groups of cells in the second direction; the large surface pushing mechanism is arranged on one side of the second centering mechanism and is configured to press the stacked battery module in the third direction. In such a design, the second centering mechanism can be used to center the two adjacent groups of cells in the first direction to improve the side planeness of the two adjacent groups of cells; at the same time, the third clamping mechanism can be used to position the two adjacent groups of cells in the second direction to press the two adjacent groups of cells on the table of the stacking table, so that the two adjacent groups of cells are close to the table of the stacking table to improve the bottom planeness of the cells; and the large surface pushing mechanism is used to press the stacked battery module in the third direction to press the two adjacent groups of cells together, and at the same time, the stacked battery module is kept under pressure, thereby improving the stacking accuracy of the battery module.

[0013] In some embodiments, the second centering mechanism includes a fourth driving member and two second baffles arranged opposite to each other, the second baffles are connected to the fourth driving member by transmission, and the fourth driving member drives the two second baffles to move closer to each other or farther away from each other to clamp or release two adjacent groups of battery cells in the first direction. With such a design, when the second baffles are driven by the fourth driving member to move closer to each other, the two adjacent groups of battery cells can be clamped by the two second baffles to center the two adjacent groups of battery cells; when the second baffles are driven by the fourth driving member to move away from each other, the two second baffles release the two adjacent groups of battery cells to facilitate the removal of the stacked battery module.

[0014] In some embodiments, the third clamping mechanism includes a fifth driving member and a third clamping member, the third clamping member is connected to the fifth driving member by transmission, and the fifth driving member drives the third clamping member to rise and fall, and to clamp or release two adjacent groups of battery cells in the second direction. With such a design, when the third clamping member is driven down by the fifth driving member, the two adjacent groups of battery cells can be clamped on the table surface of the stacking table in the second direction by the third clamping member, so as to improve the bottom flatness of the two adjacent groups of battery cells; when the third clamping member is driven up by the fifth driving member, the third clamping member releases the end plate to facilitate the removal of the stacked battery module.

[0015] In some embodiments, the large-surface pushing mechanism includes a sixth driving member and a pushing member, the pushing member is transmission-connected to the sixth driving member, and the sixth driving member drives the pushing member to move toward the end plate positioning mechanism to compress the stacked battery modules in the third direction. With such a design, when the pushing member is driven by the sixth driving member to move toward the end plate positioning mechanism, the stacked battery modules can be compressed in the third direction by the pushing member to compress the two adjacent groups of battery cells together, while maintaining the pressure of the stacked battery modules; when the pushing member is driven by the sixth driving member to move away from the end plate positioning mechanism, the pushing member releases the battery module to facilitate the removal of the stacked battery modules.

[0016] In some embodiments, the large-surface pressing mechanism further includes a distance meter, which is configured to detect the distance between two adjacent groups of battery cells. Such a design can accurately control the movement stroke of the sixth driving member driving the pressing member by using the distance meter to detect the distance between two adjacent groups of battery cells, so as to accurately control the pressing force of the pressing member on the battery module, thereby improving the pressing effect on the battery module.

[0017] In some embodiments, the support frame has a loading end and a unloading end distributed along a third direction, and the length pushing mechanism can drive the stacking platform to move in the third direction to switch between the loading end and the unloading end. In such a design, before loading, the stacking platform is first moved to the loading end by the length pushing mechanism, and then the end plate positioning mechanism and the battery cell positioning mechanism on the stacking platform are driven to move to the loading end, so as to facilitate the placement of the end plate assembly and the battery cell on the stacking platform; and before unloading, the stacking platform is moved to the unloading end by the length pushing drum, and then the end plate positioning mechanism and the battery cell positioning mechanism on the stacking platform are driven to move to the unloading end, so as to facilitate the removal of the stacked battery module.

[0018] In some embodiments, the stacking tooling is provided with at least two layers, and the at least two layers of stacking tooling are staggered in the second direction, and when the stacking tooling of the upper layer moves to the loading end, the stacking tooling of the lower layer moves to the unloading end. Such a design, using at least two layers of stacking tooling, can unload the battery modules on the stacking tooling of one layer while the stacking tooling of the other layer is loading and stacking, which can improve work efficiency.

[0019] In some embodiments, the end plate positioning mechanism and the battery cell positioning mechanism are spaced apart along the third direction, and the length pushing mechanism is disposed on the side of the battery cell positioning mechanism away from the end plate positioning mechanism. With such a design, the length pushing mechanism can be used to smoothly push the end plate assembly toward the end plate positioning mechanism, and the battery cell toward the battery cell positioning mechanism, while making the overall structure more compact, thereby achieving the effect of reducing the volume.

[0020] In some embodiments, the battery module stacking device further includes a loading mechanism, which is disposed on one side of the support frame and is configured to transport the end plate assembly and the battery cell to the table of the stacking table. With such a design, the loading mechanism can be used to automatically transport the end plate assembly and the battery cell to the table of the stacking table to achieve automatic loading.

[0021] In some embodiments, the battery module stacking device further includes a material unloading mechanism, which is disposed on one side of the support frame and is configured to transport the stacked battery modules from the table top of the stacking table to the next process. With such a design, the material unloading mechanism can be used to automatically transport the stacked battery modules from the table top of the stacking table to the next process to achieve automatic unloading.

[0022] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, which can be implemented in accordance with the contents of the specification, and to make other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0024] Figure 1 This is a schematic structural diagram of an embodiment of a battery module stacking device of the present application; Figure 2 This is a structural schematic diagram of a stacking tool in an embodiment of a battery module stacking device of the present application; Figure 3 This is a partial structural schematic diagram of a stacking tool in an embodiment of a battery module stacking device of the present application; Figure 4 This is a structural schematic diagram of an end plate positioning mechanism in an embodiment of a battery module stacking device of the present application; Figure 5 This is a structural schematic diagram of a cell positioning mechanism in one embodiment of a battery module stacking device of the present application.

[0025] Description of Figure Numbers:

[0026] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0027] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0029] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0030] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0031] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0032] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or component must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the embodiments of the present application.

[0033] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0034] With the rapid development of society, the demand for electric vehicles is increasing year by year. The energy of electric vehicles mainly comes from battery packs. The smallest unit of a battery pack is a battery cell, which is an energy storage unit. When multiple battery cells are packaged together in the same shell frame and connected to the outside through a unified boundary, they become a battery module. When several battery modules are controlled or managed by BMS (battery management system) and thermal management system, this unified whole is a battery pack, and the process of placing multiple battery cells in the same shell is called the stacking process of battery modules.

[0035] In the related art, a robot cell gripper grabs the cell and places it on a stacking ramp buffer table, and then the stacking ramp gripper grabs the cell from the buffer table to complete the stacking. However, the position of the cell to the buffer table is different each time, resulting in low assembly accuracy of battery module stacking.

[0036] Based on the above problems, the present application proposes a battery module stacking device 100, which aims to solve the problem of low assembly precision of battery module stacking. The device 100 is described in detail below with reference to specific drawings and embodiments.

[0037] See also Figures 1 to 5In one embodiment of the present application, the battery module stacking device 100 includes a support frame 10 and a stacking tool 20; the stacking tool 20 is arranged on the support frame 10, and the stacking tool 20 includes a stacking platform 21, an end plate positioning mechanism 22, a battery cell positioning mechanism 23 and a length pushing mechanism 24; wherein, the end plate positioning mechanism 22 is arranged on the stacking platform 21, and is configured to position the end plate assembly, the end plate assembly includes an end plate and at least one battery cell; the battery cell positioning mechanism 23 is arranged on the stacking platform 21, and is configured to position two adjacent groups of battery cells and press the stacked battery modules; the length pushing mechanism 24 is arranged on the stacking platform 21, and is configured to push the end plate assembly toward the end plate positioning mechanism 22, and push the battery cell toward the battery cell positioning mechanism 23.

[0038] The end plate positioning mechanism 22 is configured to position the end plate assembly in the first direction a and the second direction b; the end plate positioning mechanism 22 includes a first centering mechanism 221, a first clamping mechanism 222 and a second clamping mechanism (not shown); the first centering mechanism 221 is configured to position the battery cell of the end plate assembly in the first direction a; the first clamping mechanism 222 is arranged on one side of the first centering mechanism 221 and is configured to position the end plate in the second direction b; the second clamping mechanism is arranged on the side of the first centering mechanism 221 away from the first clamping mechanism 222 and is configured to position the battery cell of the end plate assembly in the second direction b. The end plate positioning mechanism 22 also includes a positioning member 224, which is arranged below the first centering mechanism 221 and is configured to be inserted into the notch of the end plate to position the end plate in the first direction a and the second direction b.

[0039] The support frame 10 is used to install and fix the stacking tool 20, so that the stacking tool 20 is stable during the stacking process. The support frame 10 may include multiple support frames and a mounting plate, and the mounting plate is supported on the multiple support frames, so that the multiple support frames and the mounting plate can form a structure in the shape of a cube, a cylinder, etc., and the stacking tool 20 is installed on the mounting plate.

[0040] The stacking tool 20 is used to realize automatic stacking of battery modules. The stacking platform 21 is a mounting platform, and the end plate positioning mechanism 22, the battery cell positioning mechanism 23 and the length tightening mechanism 24 are all mounted on the stacking platform 21.

[0041] The end plate positioning mechanism 22 can position the end plate assembly, and the positioning direction includes but is not limited to the horizontal direction and the vertical direction. The end plate positioning mechanism 22 can position the end plate assembly by one or more methods such as centering, pressing, clamping, and clamping.

[0042] The first centering mechanism 221 is used to clamp or release the battery cell of the end plate assembly in the first direction a, and when clamping the battery cell of the end plate assembly, the battery cell of the end plate assembly can be centered. The first centering mechanism 221 can be a structure in which a cylinder cooperates with a first transmission member, wherein the first transmission member can be a baffle, a push rod, a clamping claw or other structural members.

[0043] The first clamping mechanism 222 is used to clamp or release the end plate in the second direction b so that the end plate is tightly attached to the table surface of the stacking table 21. The first clamping mechanism 222 can also be a structure in which a cylinder cooperates with a second transmission member, wherein the second transmission member can be a pressure block, a pressure plate, a push rod or other structural members.

[0044] The second clamping mechanism is used to clamp or release the battery cells of the end plate assembly in the second direction b, so that the battery cells of the end plate assembly are closely attached to the surface of the stacking table 21. The second clamping mechanism can also be a structure in which a cylinder cooperates with a third transmission member, wherein the third transmission member can also be a structural member such as a pressure block, a pressure plate, and a push rod.

[0045] The positioning member 224 is used to be inserted into the notch of the end plate and abut against the inner wall of the notch to position the end plate in the first direction a and the second direction b. The positioning member 224 can be a positioning pin, a positioning rod, a positioning block or other structural members. There can be one or at least two positioning members 224, which can be determined specifically according to the number of notches on the end plate. The positioning member 224 can be fixed relative to the stacking platform 21, or it can be movable relative to the stacking platform 21, as long as the positioning member 224 is inserted into the notch of the end plate when the end plate assembly moves to the end plate positioning mechanism 22.

[0046] The cell positioning mechanism 23 can position two adjacent groups of cells, and the positioning direction includes but is not limited to the horizontal direction and the vertical direction, so that the flatness of the bottom and the side between the two adjacent groups of cells is consistent. The cell positioning mechanism 23 can also use one or more methods such as centering, pressing, clamping, and clamping to achieve the positioning of the two adjacent groups of cells.

[0047] The length pushing mechanism 24 can smoothly push the end plate assembly to the end plate positioning mechanism 22, and can also push the battery cell and the last set of end plate assemblies to the battery cell positioning mechanism 23. The length pushing mechanism 24 can push the end plate assembly and the battery cell by using a cylinder and a push rod, or by using a cylinder and a screw nut, or by using a cylinder and a gear rack.

[0048] In summary, in the technical solution of the embodiment of the present application, the technical solution of the present application adopts a battery module stacking device 100 to realize the stacking of battery modules. In the first step, the end plate assembly is first placed on the stacking table 21, and the length pushing mechanism 24 is used to push the end plate assembly to the end plate positioning mechanism 22, so as to use the end plate positioning mechanism 22 to position the end plate assembly; in the second step, the next group of battery cells is placed on the stacking table 21, and the length pushing mechanism 24 is used to push the battery cells to the battery cell positioning mechanism 23, so as to use the battery cell positioning mechanism 23 to position the battery cells on the end plate assembly and the next group of battery cells, that is, the battery cell positioning mechanism 23 is used to position the two adjacent groups of battery cells, and the battery cell positioning mechanism 23 is used to position the battery cells on the end plate assembly and the next group of battery cells. The positioning mechanism 23 presses the stacked battery modules to make the two adjacent groups of battery cells fit together. According to the required number of battery cells in the battery module, the above second step is repeated in a cycle. When a sufficient number of battery cells are stacked, the last group of end plate assemblies is finally placed on the stacking table 21, and the length pushing mechanism 24 is used to push the last group of end plate assemblies toward the battery cell positioning mechanism 23, so that the battery cell positioning mechanism 23 is used to position the last group of end plate assemblies, and at the same time, the battery cell positioning mechanism 23 is used to press the stacked battery modules, and finally the stacking of the entire battery module is completed. Therefore, the battery module stacking equipment 100 provided in the present application directly places the end plate assembly and the battery cells on the stacking table 21, and then adopts the cooperation of the end plate positioning mechanism 22, the battery cell positioning mechanism 23 and the length pushing mechanism 24 to realize the automatic stacking of the battery modules. There is no need to place the battery cells on the stacking ramp buffer table first, and then use the stacking ramp clamp to grab the battery cells from the buffer table to complete the stacking, thereby avoiding redundant steps such as grabbing the battery cells from the cache table of the stacking table 21, thereby reducing the increase in the size ring caused by the superposition of multiple processes, so as to improve the flatness of the bottom and side of the battery cell, and achieve the flatness of the bottom and side of the battery cell <0.1mm, thereby improving the assembly accuracy.

[0049] In addition, the end plate positioning mechanism 22 can be used to position the end plate assembly in the X-axis and Z-axis directions to improve the bottom and side flatness of the end plate assembly, which can improve the positioning accuracy of the end plate assembly. The first centering mechanism 221 can be used to position the battery cell of the end plate assembly in the first direction a, and then the end plate assembly is centered in the first direction a to improve the side flatness of the end plate assembly; at the same time, the first clamping mechanism 222 and the second clamping mechanism can be used to position the end plate and the battery cell in the second direction b respectively, so as to press the end plate assembly against the table surface of the stacking table 21, so that the end plate assembly is closely attached to the table surface of the stacking table 21, so as to improve the bottom flatness of the end plate assembly.

[0050] In addition, when the length pushing mechanism 24 pushes the end plate assembly toward the end plate positioning mechanism 22, the positioning piece 224 is first inserted into the notch of the end plate to pre-position the end plate in the first direction a and the second direction b, and then the end plate assembly is re-positioned by the first centering mechanism 221, the first clamping mechanism 222 and the second clamping mechanism, which can further improve the positioning accuracy of the end plate assembly.

[0051] See also Figures 2 to 4 In one embodiment of the present application, the battery cell positioning mechanism 23 is configured to position two adjacent groups of battery cells in the first direction a and the second direction b, and to press the stacked battery module in the third direction c; the length pushing mechanism 24 is configured to push the end plate assembly and the battery cells in the third direction c; the first direction a, the second direction b and the third direction c are arranged at angles to each other.

[0052] In this embodiment, the first direction a, the second direction b and the third direction c can be the X-axis, Z-axis and Y-axis directions respectively. The end plate positioning mechanism 22 can position the end plate assembly in the X-axis and Z-axis directions; the battery cell positioning mechanism 23 can position two adjacent groups of battery cells in the X-axis and Z-axis directions, and can press the stacked battery module in the Y-axis direction; the length pushing mechanism 24 can push the end plate assembly and the battery cell in the Y-axis direction.

[0053] With such a design, the cell positioning mechanism 23 can be used to position two adjacent groups of cells in the X-axis and Z-axis directions to improve the bottom and side flatness of the two adjacent groups of cells, and the positioning accuracy of the two adjacent groups of cells can be improved. In addition, by using the cell positioning mechanism 23 to press the stacked battery module in the Y-axis direction, and using the length pushing mechanism 24 to push the end plate assembly and the cells in the Y-axis direction, the positioning effect of the end plate assembly and the cells can be not affected during the pushing and pressing process, thereby achieving high positioning accuracy and automated stacking effects at the same time.

[0054] See also Figure 4 In one embodiment of the present application, the positioning member 224 can be telescopic in the second direction b.

[0055] When the positioning member 224 extends in the second direction b, it can be inserted into the notch of the end plate; when the positioning member 224 retracts in the second direction b, it can be removed from the notch of the end plate.

[0056] With such a design, when the length pushing mechanism 24 pushes the end plate assembly toward the end plate positioning mechanism 22, the positioning member 224 extends in the second direction b into the notch of the end plate to pre-position the end plate. After stacking is completed, the positioning member 224 can retract in the second direction b to escape from the notch of the end plate, making it easier to remove the stacked battery module.

[0057] See also Figure 4 In one embodiment of the present application, the first centering mechanism 221 includes a first driving member 2211 and two oppositely arranged first baffles 2212, the first baffles 2212 are transmission-connected to the first driving member 2211, and the first driving member 2211 drives the two first baffles 2212 to move closer to or away from each other to clamp or release the battery cell of the end plate assembly in the first direction a.

[0058] The first driving member 2211 provides power for the two first baffles 2212 to move closer to or away from each other. The first driving member 2211 may include a cylinder and two output members. The output member may be a push rod, or a screw nut, or a gear rack structure. The two first baffles 2212 are respectively connected to the two output members, and the two output members are driven to move by the cylinder, and then the two first baffles 2212 are respectively driven by the two output members to move closer to or away from each other.

[0059] With such a design, when the two first baffles 2212 are driven toward each other by the first driving member 2211, the battery cells of the end plate assembly can be clamped by the two first baffles 2212 to center the end plate assembly; when the two first baffles 2212 are driven away from each other by the first driving member 2211, the two first baffles 2212 release the end plate assembly to facilitate removal of the stacked battery modules.

[0060] See also Figure 4 In one embodiment of the present application, the first clamping mechanism 222 includes a second driving member 2221 and a first clamping member 2222. The first clamping member 2222 is transmission-connected to the second driving member 2221. The second driving member 2221 drives the first clamping member 2222 to rise and fall to clamp or release the end plate in the second direction b.

[0061] The second driving member 2221 provides power for the lifting and lowering of the first clamping member 2222. The second driving member 2221 may only include a linear motor to directly connect the first clamping member 2222 to the output shaft of the linear motor so that it can be lifted and lowered along with the output shaft of the linear motor; or, the second driving member 2221 may also include a rotating motor and a screw nut to connect the screw to the output shaft of the rotating motor, and connect the first clamping member 2222 to the nut. The rotating motor can drive the screw to rotate so that the nut moves along the length direction of the screw, and then drives the first clamping member 2222 to be lifted and lowered through the nut.

[0062] With such a design, when the first clamping member 2222 is driven down by the second driving member 2221, the end plate can be pressed against the table surface of the stacking table 21 in the second direction b by the first clamping member 2222 to improve the bottom flatness of the end plate; when the first clamping member 2222 is driven up by the second driving member 2221, the first clamping member 2222 releases the end plate to facilitate the removal of the stacked battery module.

[0063] See also Figure 4 In one embodiment of the present application, the second clamping mechanism includes a third driving member and a second clamping member, the second clamping member is transmission-connected to the third driving member, and the third driving member drives the second clamping member to rise and fall to clamp or release the battery cell of the end plate assembly in the second direction b.

[0064] The third driving member provides power for the lifting and lowering of the second clamping member. The third driving member may only include a linear motor to directly connect the second clamping member to the output shaft of the linear motor so that it can be lifted and lowered along with the output shaft of the linear motor; or, the third driving member may also include a rotating motor and a screw nut to connect the screw to the output shaft of the rotating motor and connect the second clamping member to the nut. The rotating motor can drive the screw to rotate so that the nut moves along the length direction of the screw, thereby driving the second clamping member to be lifted and lowered through the nut.

[0065] With such a design, when the second clamping member is driven down by the third driving member, the battery cells of the end plate assembly can be pressed against the surface of the stacking table 21 in the second direction b by the second clamping member to improve the bottom flatness of the battery cells; when the second clamping member is driven up by the third driving member, the second clamping member releases the battery cells to facilitate the removal of the stacked battery module.

[0066] See also Figure 5 In one embodiment of the present application, the battery cell positioning mechanism 23 includes a second centering mechanism 231, a third clamping mechanism 232 and a large-surface pushing mechanism 233; the second centering mechanism 231 is configured to position two adjacent groups of battery cells in a first direction a; the third clamping mechanism 232 is disposed on one side of the second centering mechanism 231, and is configured to position two adjacent groups of battery cells in a second direction b; the large-surface pushing mechanism 233 is disposed on one side of the second centering mechanism 231, and is configured to clamp the stacked battery modules in a third direction c.

[0067] The second centering mechanism 231 is used to clamp or release two adjacent groups of battery cells in the first direction a. When clamping two adjacent groups of battery cells, the two adjacent groups of battery cells can be centered to keep the flatness of the sides of the two adjacent groups of battery cells consistent. The second centering mechanism 231 can be a structure in which a cylinder cooperates with a fourth transmission member, wherein the fourth transmission member can be a baffle, a push rod, a clamping claw or other structural members.

[0068] The third clamping mechanism 232 is used to clamp or release two adjacent groups of battery cells in the second direction b, so that the two adjacent groups of battery cells are closely attached to the surface of the stacking table 21. The second clamping mechanism can also be a structure in which a cylinder cooperates with a fifth transmission member, wherein the fifth transmission member can be a structural member such as a pressure block, a pressure plate, and a push rod.

[0069] The large surface pressing mechanism 233 is used to press the stacked battery modules in the third direction c to press two adjacent groups of battery cells together. The large surface pressing mechanism 233 may include a structure in which a cylinder cooperates with a sixth transmission member, and the sixth transmission member may also be a pressure block, a pressure plate, a push rod or other structural members.

[0070] With such a design, a second centering mechanism 231 can be used to center two adjacent groups of battery cells in a first direction a to improve the side flatness of the two adjacent groups of battery cells; at the same time, a third clamping mechanism 232 can be used to position two adjacent groups of battery cells in a second direction b to press the two adjacent groups of battery cells onto the surface of the stacking table 21 so that the two adjacent groups of battery cells are tightly attached to the surface of the stacking table 21 to improve the bottom flatness of the battery cells; and a large-surface pushing mechanism 233 can be used to press the stacked battery module in a third direction c to press the two adjacent groups of battery cells together and maintain the pressure of the stacked battery module, thereby improving the stacking accuracy of the battery module.

[0071] See also Figure 5 In one embodiment of the present application, the second centering mechanism 231 includes a fourth driving member 2311 and two oppositely arranged second baffles 2312, the second baffles 2312 are transmission-connected to the fourth driving member 2311, and the fourth driving member 2311 drives the two second baffles 2312 to move closer to or away from each other to clamp or release two adjacent groups of battery cells in the first direction a.

[0072] The fourth driving member 2311 provides power for the two second baffles 2312 to move closer to or away from each other. The fourth driving member 2311 may include a cylinder and two output members. The output member may be a push rod, or a screw nut or a gear rack structure. The two second baffles 2312 are respectively connected to the two output members, and the two output members are driven to move by the cylinder, and then the two second baffles 2312 are respectively driven to move closer to or away from each other by the two output members.

[0073] With such a design, when the two second baffles 2312 are driven toward each other by the fourth driving member 2311, the two adjacent groups of battery cells can be clamped by the two second baffles 2312 to center the two adjacent groups of battery cells; when the two second baffles 2312 are driven away from each other by the fourth driving member 2311, the two second baffles 2312 release the two adjacent groups of battery cells to facilitate the removal of the stacked battery module.

[0074] See also Figure 5 In one embodiment of the present application, the third clamping mechanism 232 includes a fifth driving member 2321 and a third clamping member 2322. The third clamping member 2322 is transmission-connected to the fifth driving member 2321. The fifth driving member 2321 drives the third clamping member 2322 to rise and fall, thereby clamping or releasing two adjacent groups of battery cells in the second direction b.

[0075] The fifth driving member 2321 provides power for the lifting and lowering of the third clamping member 2322. The fifth driving member 2321 may only include a linear motor to directly connect the third clamping member 2322 to the output shaft of the linear motor so that it can be lifted and lowered along with the output shaft of the linear motor; or, the fifth driving member 2321 may also include a rotating motor and a screw nut to connect the screw to the output shaft of the rotating motor, and connect the third clamping member 2322 to the nut. The rotating motor can drive the screw to rotate so that the nut moves along the length direction of the screw, and then drive the third clamping member 2322 to be lifted and lowered through the nut.

[0076] With such a design, when the third clamping member 2322 is driven down by the fifth driving member 2321, the two adjacent groups of battery cells can be pressed onto the surface of the stacking table 21 in the second direction b by the third clamping member 2322 to improve the bottom flatness of the two adjacent groups of battery cells; when the third clamping member 2322 is driven up by the fifth driving member 2321, the third clamping member 2322 releases the end plate to facilitate the removal of the stacked battery module.

[0077] See also Figure 5 In one embodiment of the present application, the large-surface pushing mechanism 233 includes a sixth driving member 2331 and a pushing member 2332. The pushing member 2332 is transmission-connected to the sixth driving member 2331. The sixth driving member 2331 drives the pushing member 2332 to move toward the end plate positioning mechanism 22 to press the stacked battery modules in the third direction c.

[0078] The sixth driving member 2331 provides power for the movement of the pushing member 2332. The sixth driving member 2331 may only include a linear motor to directly connect the pushing member 2332 to the output shaft of the linear motor so that it moves in the third direction c along with the output shaft of the linear motor; or, the sixth driving member 2331 may also include a rotating motor and a screw nut to connect the screw to the output shaft of the rotating motor, and connect the pushing member 2332 to the nut. The rotating motor can drive the screw to rotate so that the nut moves along the length direction of the screw, and then drive the pushing member 2332 to move in the third direction c through the nut.

[0079] With such a design, when the pushing member 2332 is driven by the sixth driving member 2331 to move toward the end plate positioning mechanism 22, the stacked battery modules can be pressed in the third direction c by the pushing member 2332 to press two adjacent groups of battery cells together and maintain the pressure of the stacked battery modules; when the pushing member 2332 is driven by the sixth driving member 2331 to move away from the end plate positioning mechanism 22, the pushing member 2332 releases the battery module to facilitate the removal of the stacked battery modules.

[0080] See also Figure 5 In one embodiment of the present application, the large-surface pushing mechanism 233 further includes a distance meter 2333, and the distance meter 2333 is configured to detect the distance between two adjacent groups of battery cells.

[0081] The rangefinder 2333 can detect the distance between two adjacent groups of battery cells and transmit a signal to the control end, and the control end controls the sixth driving member 2331 to drive the movement stroke of the pushing member 2332. The rangefinder 2333 may include but is not limited to a laser rangefinder 2333, an ultrasonic rangefinder 2333, a contact rangefinder 2333, and an infrared rangefinder 2333.

[0082] Such a design, by using the rangefinder 2333 to detect the distance between two adjacent groups of battery cells, can accurately control the movement stroke of the sixth driving member 2331 to drive the pushing member 2332, so as to accurately control the clamping force of the pushing member 2332 on the battery module, thereby improving the clamping effect on the battery module.

[0083] See also Figure 2 In one embodiment of the present application, the support frame 10 has a loading end 11 and a unloading end 12 distributed along a third direction c, and the length pushing mechanism 24 can drive the stacking platform 21 to move in the third direction c to switch between the loading end 11 and the unloading end 12.

[0084] The loading end 11 refers to an end of the support frame 10 close to the previous process, and the unloading end 12 refers to an end of the support frame 10 close to the next process.

[0085] With such a design, before loading, the stacking platform 21 is first moved to the loading end 11 by the length pushing mechanism 24, thereby driving the end plate positioning mechanism 22 and the battery cell positioning mechanism 23 on the stacking platform 21 to move to the loading end 11, thereby facilitating the placement of the end plate assembly and the battery cell on the stacking platform 21; and before unloading, the stacking platform 21 is moved to the unloading end 12 by the length pushing drum, thereby driving the end plate positioning mechanism 22 and the battery cell positioning mechanism 23 on the stacking platform 21 to move to the unloading end 12, thereby facilitating the removal of the stacked battery modules.

[0086] See also Figure 2In one embodiment of the present application, the stacking tooling 20 is provided with at least two layers, and at least two layers of the stacking tooling 20 are staggered in the second direction b. When the upper layer of the stacking tooling 20 moves to the loading end 11, the lower layer of the stacking tooling 20 moves to the unloading end 12.

[0087] Each layer of the stacking tool 20 can stack one battery module at a time, or can stack at least two battery modules at a time. It can be understood that the end plate positioning mechanism 22, the battery cell positioning mechanism 23, and the length tightening mechanism 24 of the stacking tool 20 are defined as a stacking unit, and the stacking platform 21 of the stacking tool 20 can be provided with one or at least two stacking units. When at least two stacking units are provided, the at least two stacking units can be arranged at intervals in the first direction a.

[0088] Such a design, which uses at least two layers of stacking tools 20, can simultaneously unload battery modules on another layer of stacking tools 20 during the loading and stacking process on one layer of stacking tools 20, thereby improving work efficiency.

[0089] See also Figure 2 In one embodiment of the present application, the end plate positioning mechanism 22 and the battery cell positioning mechanism 23 are spaced apart along the third direction c, and the length pushing mechanism 24 is disposed on a side of the battery cell positioning mechanism 23 away from the end plate positioning mechanism 22 .

[0090] With this design, the length pushing mechanism 24 can be used to smoothly push the end plate assembly to the end plate positioning mechanism 22, and the battery cell to the battery cell positioning mechanism 23, while making the overall structure more compact to achieve the effect of reducing the volume.

[0091] See also Figure 1 In one embodiment of the present application, the battery module stacking device 100 also includes a loading mechanism 30, which is disposed on one side of the support frame 10 and is configured to transport the end plate assembly and the battery cells to the table top of the stacking table 21.

[0092] The loading mechanism 30 is used to transport the end plate assembly and the battery cell to the table top of the stacking table 21. The loading mechanism 30 can be a manipulator, or a structure in which a three-axis moving mechanism and a clamp cooperate. For example, the three-axis moving mechanism can include an X-axis moving mechanism, a Y-axis moving mechanism, and a Z-axis moving mechanism; the X-axis moving mechanism can include an X-axis track, a first slider, and a first drive motor, and the first drive motor drives the first slider to slide along the X-axis track; the Y-axis moving mechanism can include a Y-axis track, a second slider, and a second drive motor, and the Y-axis track is connected to the first slider, and the second drive motor drives the second slider to slide along the Y-axis track; the Z-axis moving mechanism can include a Z-axis track, a third slider, and a third drive motor, and the Z-axis track is connected to the second slider, and the third drive motor drives the third slider to slide along the Z-axis track. Therefore, the clamp can be driven to move in three-dimensional space under the drive of the three-axis moving mechanism, so as to smoothly transport the end plate assembly and the battery cell to the table top of the stacking table 21 through the clamp.

[0093] With such a design, the loading mechanism 30 can be used to automatically transport the end plate assembly and the battery cells to the table surface of the stacking table 21 to achieve automatic loading.

[0094] See also Figure 1 In one embodiment of the present application, the battery module stacking device 100 also includes a material unloading mechanism 40, which is disposed on one side of the support frame 10 and is configured to transport the stacked battery modules from the table top of the stacking table 21 to the next process.

[0095] The unloading mechanism 40 is used to transport the stacked battery modules from the table of the stacking table 21 to the next process. The unloading mechanism 40 can be a manipulator, or a structure with a three-axis moving mechanism and a clamp. It can be understood that the unloading mechanism 40 and the loading mechanism 30 can be the same.

[0096] With such a design, the unloading mechanism 40 can be used to automatically transport the stacked battery modules from the table top of the stacking table 21 to the next process, so as to realize automatic unloading.

[0097] According to some embodiments of the present application, the present application provides a battery module stacking device 100, see Figures 1 to 5The stacking steps of the battery module stacking device 100 can be as follows: the loading mechanism 30 grabs the end plate assembly and places it on the table top of the stacking table 21; the length pushing mechanism 24 pushes the end plate assembly to the end plate positioning mechanism 22; the positioning member 224 of the end plate positioning mechanism 22 extends into the notch of the end plate to pre-position the end plate in the first direction a and the second direction b; the first centering mechanism 221 positions the battery cell of the end plate assembly in the first direction a, and then centers the end plate assembly in the first direction a to improve the side of the end plate assembly At the same time, the first clamping mechanism 222 and the second clamping mechanism respectively clamp and position the end plate and the battery cell in the second direction b, so as to clamp the end plate assembly on the table surface of the stacking table 21, so as to improve the bottom flatness of the end plate assembly; the feeding mechanism 30 grabs the second group of battery cells and places them on the table surface of the stacking table 21; the length pushing mechanism 24 pushes the second group of battery cells to the position of 5mm of the battery cells (the first group of battery cells) of the end plate assembly; the second centering mechanism 231 centers the two adjacent groups of battery cells in the first direction a, so as to improve the side plane of the two adjacent groups of battery cells Then, the third pressing mechanism 232 positions the two adjacent groups of battery cells in the second direction b, so as to press the two adjacent groups of battery cells on the table surface of the stacking table 21, so that the two adjacent groups of battery cells are tightly attached to the table surface of the stacking table 21, so as to improve the bottom flatness of the battery cells; then, the large surface pushing mechanism 233 presses the stacked battery module in the third direction c, so as to press the two adjacent groups of battery cells together; the above steps after grabbing the second group of battery cells are repeated; when there are enough battery cells in the stack, the last group of end plate assemblies is finally placed on the stacking table 21. , and use the length pushing mechanism 24 to push the last group of end plate assemblies to the position 5mm in front of the previous group of battery cells, so as to use the second centering mechanism 231 and the third pressing mechanism 232 to position the last group of end plate assemblies, and use the large surface pushing mechanism 233 to press the stacked battery modules, and at the same time, maintain the pressure of the stacked battery modules, and finally complete the stacking of the entire battery module; the length pushing mechanism 24 moves the stacking tool 20 from the loading end 11 to the unloading end 12; the unloading mechanism 40 transports the stacked battery modules from the stacking table 21 to the next process.

[0098] The above description is only an exemplary embodiment of the present application and does not limit the patent scope of the present application. All equivalent structural changes made by using the contents of the present application specification and drawings under the technical concept of the present application, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present application.

Claims

1. A battery module stacking device, characterized in that: include: Support frame; A stacking tool is arranged on the support frame, and the stacking tool comprises a stacking table, an end plate positioning mechanism, a battery cell positioning mechanism and a length tightening mechanism; Wherein, the end plate positioning mechanism is provided on the stacking platform and is configured to position the end plate assembly, wherein the end plate assembly comprises an end plate and at least one battery cell; The battery cell positioning mechanism is disposed on the stacking platform and is configured to position two adjacent groups of battery cells and press the stacked battery module; The length pushing mechanism is disposed on the stacking platform and is configured to push the end plate assembly toward the end plate positioning mechanism and push the battery cell toward the battery cell positioning mechanism; The end plate positioning mechanism is configured to position the end plate assembly in a first direction and a second direction; The end plate positioning mechanism comprises: A first centering mechanism, configured to position the battery cell of the end plate assembly in the first direction; a first pressing mechanism, disposed on one side of the first centering mechanism, and configured to position the end plate in the second direction; A second clamping mechanism is provided on a side of the first centering mechanism away from the first clamping mechanism and is configured to position the battery cell of the end plate assembly in the second direction; The positioning member is disposed below the first centering mechanism and is configured to be inserted into the notch of the end plate to position the end plate in the first direction and the second direction.

2. The battery module stacking device according to claim 1, characterized in that: The battery cell positioning mechanism is configured to position two adjacent groups of battery cells in a first direction and a second direction, and to press the stacked battery module in a third direction; The length pushing mechanism is configured to push the end plate assembly and the battery core in the third direction; The first direction, the second direction and the third direction are arranged at an angle to each other.

3. The battery module stacking device according to claim 1, characterized in that: The positioning member can be extended and retracted in the second direction.

4. The battery module stacking device according to claim 1, characterized in that: The first centering mechanism comprises a first driving member and two first baffles arranged opposite to each other, wherein the first baffles are transmission-connected to the first driving member, and the first driving member drives the two first baffles to move closer to or away from each other, so as to clamp or release the battery cell of the end plate assembly in the first direction; And / or, the first pressing mechanism includes a second driving member and a first pressing member, the first pressing member is transmission-connected to the second driving member, and the second driving member drives the first pressing member to rise and fall, so as to press or release the end plate in the second direction; And / or, the second clamping mechanism includes a third driving member and a second clamping member, the second clamping member is transmission-connected to the third driving member, and the third driving member drives the second clamping member to rise and fall so as to clamp or release the battery cell of the end plate assembly in the second direction.

5. The battery module stacking device according to claim 2, characterized in that: The battery cell positioning mechanism comprises: A second centering mechanism is configured to position two adjacent groups of battery cells in the first direction; a third pressing mechanism, disposed on one side of the second centering mechanism, and configured to position two adjacent groups of battery cells in the second direction; The large-surface pressing mechanism is disposed on one side of the second centering mechanism and is configured to press the stacked battery modules in the third direction.

6. The battery module stacking device according to claim 5, characterized in that: The second centering mechanism includes a fourth driving member and two second baffles arranged opposite to each other, the second baffles are transmission-connected to the fourth driving member, and the fourth driving member drives the two second baffles to move closer to or away from each other, so as to clamp or release two adjacent groups of battery cells in the first direction; And / or, the third clamping mechanism comprises a fifth driving member and a third clamping member, the third clamping member is transmission-connected to the fifth driving member, and the fifth driving member drives the third clamping member to rise and fall, so as to clamp or release two adjacent groups of battery cells in the second direction; And / or, the large-surface pushing mechanism includes a sixth driving member and a pushing member, the pushing member is transmission-connected to the sixth driving member, and the sixth driving member drives the pushing member to move toward the end plate positioning mechanism to press the stacked battery modules in the third direction.

7. The battery module stacking device according to claim 6, characterized in that: The large-surface pushing mechanism further includes a distance meter, which is configured to detect the distance between two adjacent groups of battery cells.

8. The battery module stacking device according to any one of claims 1 to 7, characterized in that: The support frame has a loading end and a unloading end distributed along a third direction, and the length pushing mechanism can drive the stacking platform to move in the third direction to switch between the loading end and the unloading end.

9. The battery module stacking device according to claim 8, characterized in that: The stacking tooling is provided with at least two layers, and the at least two layers of the stacking tooling are staggered in the second direction. When the stacking tooling of the upper layer moves to the loading end, the stacking tooling of the lower layer moves to the unloading end.

10. The battery module stacking device according to any one of claims 1 to 7, characterized in that: The end plate positioning mechanism and the battery cell positioning mechanism are spaced apart and distributed along the third direction, and the length pushing mechanism is arranged on a side of the battery cell positioning mechanism away from the end plate positioning mechanism.

11. The battery module stacking device according to any one of claims 1 to 7, characterized in that: The battery module stacking device further comprises a loading mechanism, which is disposed on one side of the support frame and is configured to transport the end plate assembly and the battery cells to the table surface of the stacking table; And / or, the battery module stacking equipment further comprises a material unloading mechanism, which is disposed on one side of the support frame and is configured to transport the stacked battery modules from the table top of the stacking table to the next process.

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