Battery module stacking, extruding and assembling device

Abstract

The utility model relates to the technical field of automobile batteries, in particular to a battery module stacking, extruding and assembling device which comprises a metal welding frame, the long-stroke main oil cylinder, the extrusion movement module, the module end plate extrusion module, the short-stroke auxiliary oil cylinder, the top limiting mechanism and the bottom supporting mechanism are mounted on the machine frame; the extrusion movement module slides on the sliding rail; the module end plate extrusion module is provided with a plurality of independent extrusion units. And the extrusion movement module can synchronously drive the extrusion unit and the drawable part of the supporting mechanism to move. The device is high in structural rigidity, stable extrusion under high pressure and large compression ratio can be achieved, and the assembly precision, stability and efficiency are improved through cooperation of multi-unit independent pressure applying and liftable supporting and by being matched with the bandage step-by-step sleeving process.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive batteries, and in particular to a battery module stacking and extrusion assembly device. Background Technology

[0002] With the rapid development of new energy vehicles and the energy storage industry, higher requirements have been placed on the energy density, cycle life, and safety and reliability of power batteries. In the battery module assembly process, extremely high clamping forces (e.g., total pressure exceeding 160 tons, corresponding to a pressure of over 40 MPa) need to be applied after the cells are stacked to achieve tight contact between the cells, reduce interface resistance, and use steel straps for binding and fixing to ensure that the module maintains stable internal pressure during long-term use. Traditional assembly processes and equipment have shown significant limitations in handling the high pressure, high compression ratio (45%-50%), and complex multi-step assembly processes required by next-generation battery cells.

[0003] The industry commonly uses single-point or single-axis press-fitting equipment driven by pneumatic or electric cylinders for the stacking and pre-pressing of battery modules. This type of equipment typically consists of a frame, a linear guide mechanism, a single pressure actuator (pneumatic / electric cylinder), and a simple support platform. The workflow is as follows: after the battery cells and end plates are neatly stacked on the support platform, the pressure actuator is driven to press down along the guide mechanism to the set position or pressure in one go. Then, manual or auxiliary equipment uses straps to secure them. The pressure output range of this type of equipment generally does not exceed 10 tons, the compression stroke is limited, and it is mostly open-loop control, unable to achieve precise closed-loop adjustment of pressure and displacement.

[0004] However, existing battery module stacking extrusion assembly devices have insufficient overall structural rigidity, limited pressure output, and low functional integration. They cannot simultaneously withstand ultra-high pressure conditions while achieving long-stroke stable extrusion, multi-point step-by-step local pressure application, and dynamic support and clearance functions linked with complex strap insertion processes. Utility Model Content

[0005] The purpose of this utility model is to provide a battery module stacking and extrusion assembly device to solve the technical problems of insufficient overall structural rigidity, limited pressure output and low functional integration of the existing battery module stacking and extrusion assembly device, which cannot achieve long-stroke stable extrusion, multi-point step-by-step local pressure and dynamic support and clearance functions in conjunction with complex strap insertion process while withstanding ultra-high pressure conditions.

[0006] In a first aspect, the present invention provides a battery module stacking and extrusion assembly device, comprising:

[0007] Metal welded frame;

[0008] A long-stroke main hydraulic cylinder is fixedly installed on one side of the metal welded frame;

[0009] The extrusion motion module is driven by the piston rod of the long-stroke main hydraulic cylinder;

[0010] The extrusion motion module slide rail is fixedly installed on the base of the metal welded frame, and the extrusion motion module is slidably installed on the extrusion motion module slide rail;

[0011] The module end plate extrusion module includes multiple independently arranged extrusion units, and the module end plate extrusion module is arranged in the metal welded frame and connected to the extrusion motion module.

[0012] Short-stroke auxiliary cylinders, with two short-stroke auxiliary cylinders connected to each of the extrusion units;

[0013] A top limiting mechanism, comprising multiple independently liftable top support units, is installed on the upper crossbeam of the metal welded frame.

[0014] A bottom support mechanism, comprising multiple independently liftable bottom support units, is mounted on the base of the metal welded frame.

[0015] The extrusion motion module drives the module end plate extrusion module, the pull-out portion of the top limiting mechanism, and the pull-out portion of the bottom support mechanism to move synchronously.

[0016] Furthermore, the top support unit of the top limiting mechanism and the bottom support unit of the bottom support mechanism are drawer-type pull-out structures.

[0017] Furthermore, the multiple extrusion units of the module end plate extrusion module are arranged side by side along the length of the module, and include at least independently movable extrusion units at both ends and a fixed extrusion unit in the middle.

[0018] Furthermore, it also includes a hydraulic control system, which includes a hydraulic station, solenoid valves and connecting pipelines, and both the long-stroke main cylinder and the short-stroke auxiliary cylinder are connected to the hydraulic control system.

[0019] Furthermore, it also includes a PLC control system, which is connected to a displacement sensor and a pressure sensor. The displacement sensor is used to detect the displacement of the extrusion motion module or the module end plate extrusion module, and the pressure sensor is used to detect the pressure of the long-stroke main cylinder or the short-stroke auxiliary cylinder.

[0020] Furthermore, the extrusion motion module slide rail is a heavy-duty linear slide rail.

[0021] Furthermore, the metal welded frame includes a base, a crossbeam, and two side frame supports connecting the base and the crossbeam.

[0022] Furthermore, it also includes a transport trolley, which is disposed in the area below the bottom support mechanism of the metal welded frame.

[0023] Furthermore, the lifting and lowering drive of the top limiting mechanism is hydraulic cylinder drive, and the lifting and lowering drive of the support units located on both sides of the bottom support mechanism is hydraulic cylinder drive.

[0024] Compared with the prior art, the present invention provides a battery module stacking extrusion assembly device, including a metal welded frame, a long-stroke main hydraulic cylinder, an extrusion motion module, an extrusion motion module slide rail, a module end plate extrusion module, a short-stroke auxiliary hydraulic cylinder, a top limiting mechanism, and a bottom support mechanism; the long-stroke main hydraulic cylinder is fixedly installed on one side of the metal welded frame; the extrusion motion module is drivenly connected to the piston rod of the long-stroke main hydraulic cylinder; the extrusion motion module slide rail is fixedly installed on the base of the metal welded frame, and the extrusion motion module is slidably installed on the extrusion motion module slide rail; the module end plate extrusion module includes multiple independently arranged extrusion units, the module end plate extrusion module is arranged in the metal welded frame and connected to the extrusion motion module; each extrusion unit is connected to two short-stroke auxiliary hydraulic cylinders; the top limiting mechanism includes multiple independently liftable top support units, the top limiting mechanism is installed on the upper crossbeam of the metal welded frame; the bottom support mechanism includes multiple independently liftable bottom support units, the bottom support mechanism is installed on the base of the metal welded frame; wherein, the extrusion motion module... The block drives the synchronous movement of the module end plate extrusion module, the pull-out part of the top limiting mechanism, and the pull-out part of the bottom support mechanism. A high-rigidity support body is constructed from a welded metal frame, integrating a long-stroke main hydraulic cylinder fixed to one side, an extrusion motion module slidably mounted on a heavy-duty slide rail, and a module end plate extrusion module containing multiple independent extrusion units driven by short-stroke auxiliary hydraulic cylinders. Combined with the independently lifting and lowering top limiting mechanism and the independently lifting and lowering bottom support mechanism, this creates an integrated device with high structural rigidity, high pressure bearing capacity, and mechanical linkage between various functional modules. This device not only meets the stable output of high pressure and high compression ratio required by next-generation battery modules but also ensures motion accuracy through slide rail guidance during long-stroke extrusion. Furthermore, through the synergy of multi-unit independent extrusion and the liftable pull-out support mechanism, it achieves dynamic clearance and segmented pressure matching the complex strapping process. Thus, while ensuring assembly quality, it significantly improves the process feasibility, operational stability, and production efficiency of high-voltage battery module stacking and extrusion assembly. Attached Figure Description

[0025] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the battery module stacking and extrusion assembly device provided in an embodiment of the present invention.

[0027] Figure label:

[0028] 100. Metal welded frame; 200. Long-stroke main hydraulic cylinder; 300. Extrusion motion module; 400. Extrusion motion module slide rail;

[0029] 510. Extrusion unit; 520. Fixed extrusion unit;

[0030] 600. Short-stroke auxiliary hydraulic cylinder; 700. Top limit mechanism; 800. Bottom support mechanism. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0032] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0034] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0035] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0036] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0037] The following detailed description, in conjunction with the accompanying drawings, outlines some embodiments of the present invention. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] refer to Figure 1 This embodiment provides a battery module stacking and extrusion assembly device, which aims to solve the technical problems of insufficient structural rigidity, limited pressure output, and inability to coordinate high-pressure long-stroke extrusion and complex strapping insertion processes in the prior art.

[0039] like Figure 1 As shown, this device mainly includes a welded metal frame 100 that serves as the overall support foundation. The frame 100 is welded together from a base, an upper crossbeam, and two side frames connecting the base and the crossbeam, forming a highly rigid box-type or portal structure that can resist enormous tension from the inside out, ensuring overall stability and controllable deformation under ultra-high pressure conditions.

[0040] On one side of the metal welded frame 100 (e.g.) Figure 1On the right side (center), a long-stroke main hydraulic cylinder 200 is fixedly installed. The piston rod of the long-stroke main hydraulic cylinder 200 is drivenly connected to an extrusion motion module 300. The extrusion motion module 300 is slidably mounted on an extrusion motion module slide rail 400 fixed to the frame base. In this embodiment, the extrusion motion module slide rail 400 is preferably a heavy-duty linear slide rail to provide precise and stable guidance for the long-stroke, high-load motion of the extrusion motion module 300, preventing deviation during high-pressure propulsion.

[0041] The front end of the extrusion motion module 300 (facing the module stacking station) is connected to a module end plate extrusion module. This module end plate extrusion module includes multiple independent extrusion units 510 arranged side-by-side along the length of the module. The extrusion units 510 at both ends are designed to move independently, while one or more extrusion units in the middle can be fixed extrusion units 520. Each extrusion unit 510 (whether movable or fixed) is connected to two short-stroke auxiliary hydraulic cylinders 600, which jointly drive it to perform precise short-stroke extrusion actions. The module end plate extrusion module, as a whole, is arranged within the internal working area of ​​the metal welded frame 100 and is fixedly connected to the extrusion motion module 300, thus allowing it to be driven by the main hydraulic cylinder 200 for overall large-stroke movement.

[0042] A top limiting mechanism 700 is installed on the upper crossbeam of the metal welded frame 100. This top limiting mechanism 700 includes multiple independently liftable top support units. Similarly, a bottom support mechanism 800 is installed on the base of the frame 100. This bottom support mechanism 800 also includes multiple independently liftable bottom support units. Preferably, both the top support units of the top limiting mechanism 700 and the bottom support units of the bottom support mechanism 800 are designed as drawer-type pull-out structures, meaning each support unit can be horizontally pulled out or pushed in on its mounting base. The lifting and lowering of these support units is preferably driven by small hydraulic cylinders, especially for the support units in the bottom support mechanism 800 located on both sides and requiring frequent movement to allow space for the straps.

[0043] A key structural feature is that the extrusion motion module 300 drives the module end plate extrusion module (particularly the movable extrusion unit 510), the retractable portion of the top limiting mechanism 700, and the retractable portion of the bottom support mechanism 800 to move synchronously via mechanical connections (such as connecting rods, slides, or synchronous belt mechanisms, not shown in the figure). This means that when the main hydraulic cylinder 200 pushes the extrusion motion module 300 forward (towards the module), these "retractable portions" will move forward along with it, thus providing the module with corresponding top limiting and bottom support during the extrusion process.

[0044] Furthermore, this device also includes a hydraulic control system (not shown in the figure, labeled HCS). The hydraulic control system includes an ultra-high pressure hydraulic station, corresponding solenoid valve groups, and high-strength connecting pipelines. The long-stroke main cylinder 200 and all short-stroke auxiliary cylinders 600 are connected to and controlled by this hydraulic control system, forming an ultra-high pressure hydraulic actuation network with a pressure of up to 70 MPa, thereby enabling the output of a total clamping force of over 160 tons.

[0045] This device also integrates a PLC control system (not shown in the figure, labeled PLC). This PLC control system is connected to displacement and pressure sensors installed at key locations. For example, the displacement sensors can detect the overall displacement of the extrusion motion module 300 or the local displacement of a specific extrusion unit 510; the pressure sensors can detect the oil pressure of the long-stroke main cylinder 200 or each short-stroke auxiliary cylinder 600. Through the closed-loop control of the PLC, the equipment can operate in either "displacement control" or "pressure control" mode, achieving precise and safe control of the extrusion distance and extrusion force.

[0046] In addition, a transport trolley is provided in the area below the bottom support mechanism 800 of the metal welded frame 100 to transfer the formed battery module out of the workstation after assembly.

[0047] A brief description of the working principle of this embodiment:

[0048] First, initial feeding: the bottom support mechanism 800 is fully raised, the top limiting mechanism 700 is raised, the extrusion motion module 300 retracts to its initial position, and all extrusion units 510 extend. The battery cells and end plates are then stacked on the bottom support mechanism 800.

[0049] Secondly, overall pre-compression: The top limiting mechanism 700 presses down, and the long-stroke main oil cylinder 200 pushes the extrusion motion module 300 and the entire module end plate extrusion module forward to perform large-stroke pre-compression of the battery cell stack (for example, the compression rate reaches 50%).

[0050] Secondly, step-by-step strapping and localized compression: Taking the insertion of the first strap as an example:

[0051] The top limiting unit, bottom support unit, and movable extrusion unit 510 at the corresponding strap path position are opened (i.e., lowered and retracted) to form a channel. The strap is then inserted into the module through this channel to the next position. Then, the extrusion unit 510 at that position, driven by the auxiliary hydraulic cylinder 600, performs a short-stroke high-pressure extrusion again, while the bottom support unit rises and resets, and the top limiting unit presses down, re-clamping the module. This process is repeated, inserting all straps in sequence. During this process, the extrusion motion module 300 drives the pull-out portion of the support mechanism to move synchronously, ensuring that the support in the non-operating position remains effective.

[0052] Finally, unloading: After all the straps are put on and locked, the extrusion motion module 300 retracts, the support mechanism is raised or moved aside, and the assembled module is removed by the transport trolley 900.

[0053] The beneficial effects of this embodiment:

[0054] This embodiment constructs a rigid and highly integrated high-pressure extrusion assembly platform through the aforementioned specific structure. Its welded metal frame 100 and heavy-duty slide rails 400 ensure overall stability and guiding accuracy under ultra-high pressure. The combination of multi-unit independently driven extrusion modules and independently lifting and pulling support mechanisms perfectly adapts to the complex process requiring the step-by-step insertion of multiple straps, achieving seamless switching between dynamic clearance and stable support. The ultra-high pressure hydraulic system and PLC closed-loop control ensure accurate and safe output of high pressure and high compression ratio. Ultimately, this device effectively solves the core problems pointed out in the background art: insufficient pressure, easy structural deformation, limited functionality, and inability to meet the high-pressure, high-efficiency assembly requirements of next-generation battery modules, significantly improving the feasibility, stability, and production efficiency of the assembly process.

[0055] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A battery module stack extrusion assembly apparatus, characterized by, The utility model relates to a metal welding frame, a long-stroke main oil cylinder fixedly installed on one side of the metal welding frame, an extrusion movement module drivingly connected with a piston rod of the long-stroke main oil cylinder, an extrusion movement module slide rail fixedly installed on a base of the metal welding frame, the extrusion movement module being slidingly installed on the extrusion movement module slide rail, a module end plate extrusion module including a plurality of independently arranged extrusion units, the module end plate extrusion module being arranged in the metal welding frame and connected with the extrusion movement module, two short-stroke auxiliary oil cylinders connected with each of the extrusion units, a top limiting mechanism including a plurality of independently liftable top support units, the top limiting mechanism being installed on an upper crossbeam of the metal welding frame, a bottom support mechanism including a plurality of independently liftable bottom support units, the bottom support mechanism being installed on the base of the metal welding frame, wherein the extrusion movement module drives the module end plate extrusion module, a pullable part of the top limiting mechanism, and a pullable part of the bottom support mechanism to move synchronously. The top support units of the top limiting mechanism and the bottom support units of the bottom support mechanism are of a drawer type pullable structure. The plurality of extrusion units of the module end plate extrusion module are arranged side by side along a module length direction and at least include independently movable extrusion units at both ends and a fixed extrusion unit at a middle part. The utility model further includes a hydraulic control system including a hydraulic station, solenoid valves, and connecting pipelines, the long-stroke main oil cylinder and the short-stroke auxiliary oil cylinders being connected with the hydraulic control system. The utility model further includes a PLC control system connected with displacement sensors and pressure sensors, the displacement sensors being used for detecting displacement of the extrusion movement module or the module end plate extrusion module, and the pressure sensors being used for detecting pressure of the long-stroke main oil cylinder or the short-stroke auxiliary oil cylinders. The extrusion movement module slide rail is a heavy-load linear slide rail. The metal welding frame includes a base, a crossbeam, and two side frame supports connected between the base and the crossbeam. The utility model further includes a carrying trolley arranged below the bottom support mechanism of the metal welding frame. The lifting driving mode of the top limiting mechanism is oil cylinder driving, and the lifting driving mode of the support units at both sides in the bottom support mechanism is oil cylinder driving. ​ 2. The battery module stack press-fitting assembly apparatus according to claim 1, wherein ​ 3. The battery module stack extrusion assembly of claim 1, wherein, ​ 4. The battery module stack extrusion assembly of claim 1, wherein, ​ 5. The battery module stack extrusion assembly of claim 1, wherein, ​ 6. The battery module stack extrusion assembly of claim 1, wherein, ​ 7. The battery module stack extrusion assembly of claim 1, wherein, ​ 8. The battery module stack extrusion assembly of claim 1, wherein, ​ 9. The battery module stack extrusion assembly of claim 1, wherein, ​

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