Assembling device for battery cell module

Abstract

The utility model discloses an assembling device for a battery cell module, which comprises a first pressing mechanism and a second pressing mechanism of which the linear movement direction is perpendicular to the linear movement direction of the first pressing mechanism, and further comprises a base body and a mounting bottom plate for placing the battery cell module, the first pressing mechanism and the second pressing mechanism are fixedly arranged on the base body; and the linear movement actions of the first pressing mechanism and the second pressing mechanism are synchronously carried out and can be respectively controlled. The first pressing mechanism and the second pressing mechanism convert rotary motion into linear motion to implement pressing motion, the first pressing mechanism comprises a first power assembly, a first transmission assembly and a first pressing assembly, the first power assembly and the first transmission assembly are arranged on the base body, and the first pressing assembly is connected to the first transmission assembly. The second pressing mechanism comprises a second power assembly and a second transmission assembly which are arranged on the base body, and a second pressurizing assembly connected to the second transmission assembly, and an installation bottom plate is arranged between the two first pressurizing assemblies.

Description

Technical Field

[0001] This application relates to the field of energy storage device manufacturing and assembly technology, and in particular to a battery module assembly device. Background Technology

[0002] Due to the rapid development of the new energy vehicle industry, new energy vehicles are gradually replacing gasoline vehicles and are being used more and more widely. In order to improve the driving range and safety performance of vehicles, automobile manufacturers are committed to improving the energy density and performance of battery modules, and the performance is closely related to the assembly quality during the assembly process.

[0003] In new energy battery assembly lines, modules are assembled from end plates, side plates, and multiple cells as needed, and the dimensional accuracy of the assembled modules must be guaranteed. Currently, automated module stacking equipment generally uses a method of fixing one end and pressing the end plates and side plates at the other end to shape and assemble the modules. This method is prone to problems such as uneven stress on the cell modules, leading to damage to individual cells and the module's dimensional accuracy not meeting requirements after assembly. Utility Model Content

[0004] In view of this, this application proposes an assembly device for battery cell modules, which can simultaneously apply the same amount of clamping force from two directions on the end side plate of the battery cell module, and can solve the problems of poor stacking dimensional accuracy of battery cell modules and uneven force that easily damages the battery cells when using assembly devices in the prior art.

[0005] According to this application, an assembly device for a battery cell module is proposed, including a first pressing mechanism and a second pressing mechanism whose linear movement direction is perpendicular to the linear movement direction of the first pressing mechanism, and also including a base and a mounting base plate for placing the battery cell module, wherein the first pressing mechanism and the second pressing mechanism are fixedly disposed on the base.

[0006] The first clamping mechanism and the second clamping mechanism move linearly synchronously and can be controlled separately;

[0007] The first and second pressing mechanisms apply pressure by converting rotational motion into linear motion to perform the pressing action;

[0008] The first pressing mechanism includes a first power component and a first transmission component fixedly disposed on the base, and at least two first pressurizing components symmetrically disposed and detachably fixedly connected to the first transmission component. The at least two first pressurizing components move synchronously towards each other under the control of the first power component.

[0009] The second pressing mechanism includes a second power component and a second transmission component fixedly disposed on the base, and at least two symmetrically arranged second pressurizing components detachably fixedly connected to the second transmission component. The at least two second pressurizing components move synchronously towards each other under the control of the second power component.

[0010] A mounting base plate (31) is provided between the two first pressurization components (13).

[0011] Preferably, the first pressurizing component moves along the length direction of the first transmission component; the second pressurizing component moves along the length direction of the second transmission component;

[0012] The assembly device also includes sensors for detecting pressure values.

[0013] Preferably, the first transmission component and / or the second transmission component are transmission methods of ball spline pair, ball screw pair or gear rack pair.

[0014] Preferably, the first pressing mechanism further includes a first guide structure arranged parallel to the length direction of the first transmission component. The first guide structure is fixedly and detachably disposed on the base and slides in contact with the first pressing component, for moving the first pressing component along the length direction of the first transmission component.

[0015] The second pressing mechanism further includes a second guide structure arranged parallel to the length direction of the second transmission component. The second guide structure is fixedly and detachably disposed on the base and slides in contact with the second pressurizing component, for moving the second pressurizing component along the length direction of the second transmission component.

[0016] Preferably, the first guide structure and / or the second guide structure is a first linear guide pair, a second linear guide pair, or a strip-shaped groove structure.

[0017] Preferably, the first power component includes a first motor, and the drive shaft of the first motor is fixedly connected to the first transmission component for driving the first rotary joint of the first transmission component to rotate;

[0018] The second power component includes a second motor, and the drive shaft of the second motor is fixedly connected to the second transmission component to drive the second rotary pair of the second transmission component to rotate.

[0019] Preferably, the first power assembly further includes a first reducer, which is fixedly connected between the first motor and the first rotary pair, and is used to control the speed of the first transmission assembly;

[0020] The second power assembly also includes a second reducer, which is fixedly connected between the second motor and the second rotary pair, and is used to control the speed of the second transmission assembly.

[0021] Preferably, the first pressurizing component includes a first pressure plate slidably mounted on a first translation pair of the first transmission component, the first pressure plate being perpendicular to the base;

[0022] The second pressurizing component includes a second pressure plate slidably mounted on a second translation pair of the second transmission component, the second pressure plate being vertically disposed on the base.

[0023] The technical solution of this application provides an assembly device that can simultaneously press the end plate and side plate of a battery cell module in two mutually perpendicular directions. Because the rotational motion of the motor is converted into the linear motion of the transmission component to implement the pressurization action, the linear position of the pressurization is precisely controllable. During the pressurization process, utilizing the characteristics of left- and right-handed ball screws or the precise meshing of gears and racks, a servo motor connected to a reducer drives the transmission component. In conjunction with a guide structure, the first and second pressurizing components move synchronously, thereby achieving simultaneous pressing of the end plate and side plate of the battery cell module in two directions. In this application, due to the high precision, high rigidity, and high transmission efficiency of the transmission component, precise positioning of the pressurizing component can be achieved, avoiding the influence of transmission errors in the transmission device itself on the pressurization pressure in existing technologies, thus improving production efficiency and processing accuracy. The battery cell module assembly device of this application ensures uniform force on the battery cell module, guarantees the performance of all battery cells in the module during assembly, and ensures that the dimensional accuracy of the assembled battery cell module accurately meets the assembly requirements.

[0024] Other features and advantages of this application will be described in detail in the following detailed description section. Attached Figure Description

[0025] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application, and the illustrative embodiments and descriptions thereof are used to explain this application. In the drawings:

[0026] Figure 1 A three-dimensional schematic diagram of a first specific embodiment of an assembly apparatus for battery cell modules;

[0027] Figure 2 A three-dimensional schematic diagram of the first clamping mechanism in the first specific embodiment;

[0028] Figure 3 This is a three-dimensional schematic diagram of the second clamping mechanism in the first specific embodiment;

[0029] Figure 4A three-dimensional schematic diagram of a first specific embodiment of an assembly apparatus for battery cell modules;

[0030] Figure 5 A three-dimensional schematic diagram of the first clamping mechanism in the first specific embodiment;

[0031] Figure 6 This is a three-dimensional schematic diagram of the second clamping mechanism in the first specific embodiment;

[0032] Figure 7 This is a three-dimensional schematic diagram of the first clamping mechanism in the second specific embodiment;

[0033] Figure 8 This is a three-dimensional schematic diagram of the first transmission component in the second specific embodiment;

[0034] Figure 9 A three-dimensional schematic diagram of the first transmission component according to the first specific embodiment;

[0035] Figure 10 This is a three-dimensional schematic diagram of the second transmission component in the first specific embodiment.

[0036] Figure Numbers: 1-Battery Cell Module; 2-Module Side Plate; 3-Module End Plate; 10-First Pressing Mechanism; 11-First Power Component; 111-First Motor; 112-First Reducer; 12-First Transmission Component; 121-First Rotary Pair; 122-First Translational Pair; 13-First Pressing Component; 131-First Pressure Plate; 14-First Guide Structure; 141-First Linear Guide Pair; 142-Second Linear Guide Pair; 143-Strip Groove Structure; 20-Second Pressing Mechanism; 21-Second Power Component; 211-Second Motor; 212-Second Reducer; 22-Second Transmission Component; 221-Second Rotary Pair; 222-Second Translational Pair; 23-Second Pressing Component; 231-Second Pressure Plate; 24-Second Guide Structure; 30-Base; 31-Mounting Base Plate; 40-Sensor; Detailed Implementation

[0037] To more clearly illustrate the embodiments of this utility model or the technical solutions in the prior art, the drawings used in the specific embodiments will be briefly described below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without any creative effort.

[0038] The technical solution of this application will now be described in detail with reference to the accompanying drawings and specific embodiments.

[0039] Figure 1This is a three-dimensional schematic diagram of a first specific embodiment of an assembly apparatus for battery cell modules. Figure 1 The assembly device for battery cell modules shown includes a first pressing mechanism 10 and a second pressing mechanism 20 whose linear movement direction is perpendicular to the linear movement direction of the first pressing mechanism 10. It also includes a base 30 and a mounting base plate 31 for placing the battery cell modules. The first pressing mechanism 10 and the second pressing mechanism 20 are fixedly disposed on the base 30. The linear movement of the first pressing mechanism 10 and the second pressing mechanism 20 is synchronized and can be controlled separately.

[0040] The first pressing mechanism 10 and the second pressing mechanism 20 apply pressure by converting the rotational motion of the servo motor drive shaft into the linear linear movement of the first transmission component 12 and the second transmission component 22 to perform the pressing action.

[0041] In use, the battery cell module 1 is first placed on the mounting base 31. After the motor is started, the lead screws of the first transmission component 12 and the second transmission component 22 rotate. The threads at both ends of the lead screw are left-hand threads and right-hand threads. Matching lead screw nuts are screwed on both ends. When the lead screw rotates with the motor output shaft, the lead screw nuts at both ends will move synchronously and linearly along the lead screw, either towards each other or away from each other.

[0042] like Figure 2 As shown, the first pressing mechanism 10 includes a first power assembly 11 and a first transmission assembly 12 fixedly disposed on the base 30, and at least two first pressurizing assemblies 13 symmetrically disposed and detachably fixedly connected to the first transmission assembly 12. The at least two first pressurizing assemblies 13 move synchronously towards each other under the control of the first power assembly 11.

[0043] like Figure 3 As shown, the second pressing mechanism 20 includes a second power assembly 21 and a second transmission assembly 22 fixedly disposed on the base 30, and at least two symmetrically arranged second pressurizing assemblies 23 detachably fixedly connected to the second transmission assembly 22. The at least two second pressurizing assemblies 23 move synchronously towards or away from each other under the control of the second power assembly 21.

[0044] In this specific embodiment, mounting base plates for the first pressure assembly 13 and the second pressure assembly 23 are fixedly installed on the sides or tops of the two lead screw nuts. These are assembled by stacking or splicing mounting plates (not limited to one piece) to form a relatively immovable first pressure assembly 13 or second pressure assembly 23. Thus, when the two lead screw nuts move synchronously along the lead screw, they will drive the corresponding pressure assemblies to move together.

[0045] like Figure 4As shown, in this specific embodiment, the assembly device also includes a sensor 40 for detecting pressure values. The sensor is fixedly mounted on the mounting base plate of the first pressurizing component 13 and is set independently of the first transmission component 12. The sensor 40 can monitor the clamping force in the length direction during the assembly of the battery cell module in real time, avoiding damage to the battery cell module due to excessive pressure.

[0046] like Figure 1 , Figure 5 , Figure 6 As shown, in this specific embodiment, the first transmission assembly 12 and the second transmission assembly 22 are ball screw pairs. The first transmission assembly 12 is fixedly disposed above the base 30, and a mounting base plate 31 is disposed between the two first pressure assemblies 13. The screw is located at the symmetrical center line of the base 30, and rectangular notches are symmetrically disposed on both sides below the mounting base plate 31 at the center of the base 30.

[0047] The second rotary joint 221 of the second transmission component 22 is a lead screw, which is fixedly installed below the base 30 and is set perpendicular to the lead screw space of the first transmission component 12. The threads at both ends of the lead screw are left-hand threads and right-hand threads, and matching lead screw nuts are screwed on at both ends. When the lead screw rotates with the motor output shaft, the lead screw nuts at both ends will move synchronously or in opposite directions along the lead screw in a linear manner.

[0048] The second translation pair 222 of the second transmission assembly 22 consists of two lead screw nuts symmetrically arranged at both ends of the lead screw. The mounting base of the second pressure assembly 23 is fixedly mounted on the side plate of the lead screw nuts. Multiple mounting plates constitute the second pressure assembly 23, which is an integral and cannot move relative to each other. In this specific embodiment, the second pressure assembly 23 extends through the notch and reaches the upper part of the base 30, located on both sides of the cell module in the width direction. The opening distance of the notch along the length direction of the second transmission assembly 22 is greater than the pressing stroke of the second translation pair 222.

[0049] like Figure 7 , Figure 8 As shown, this is the second specific embodiment of the present application, where the transmission component is a gear and rack pair 143. Only the base plate 30 and the first pressing mechanism 10 are shown in the figure. Although the second pressing mechanism 20 is not shown in the figure, a corresponding design can be easily derived based on the technical concept of this application.

[0050] In the second specific embodiment, the first rotary pair 121 is a gear assembly fixedly connected to the output shaft of the motor, with parallel rack assemblies meshing on both sides of the gear. During use, when the motor drives the gear to rotate, the racks on both sides move linearly in opposite directions. The accuracy of the rack drive directly affects the transmission accuracy and positioning accuracy. In this specific embodiment, high-precision racks are used, the meshing clearance between the rack and gear is strictly controlled, and a suitable lubrication method is adopted to improve the accuracy of the rack drive, thereby ensuring the transmission accuracy and positioning accuracy of the first transmission assembly 12 and the second transmission assembly 22. In this specific embodiment, a gear-rack pair with a precision grade of 7 is selected.

[0051] like Figure 5 , Figure 6 , Figure 8 As shown, the first pressing mechanism 10 also includes a first guide structure 14 arranged parallel to the length direction of the first transmission assembly 12. The first guide structure 14 is fixedly and detachably disposed on the base 30 and slides in contact with the first pressing assembly 13, for moving the first pressing assembly 13 along the length direction of the first transmission assembly 12.

[0052] The second pressing mechanism 20 also includes a second guide structure 24 arranged parallel to the length direction of the second transmission assembly 22. The second guide structure 24 is fixedly and detachably disposed on the base 30 and slides in contact with the second pressurizing assembly 23, for moving the second pressurizing assembly 23 along the length direction of the second transmission assembly 22.

[0053] In the first embodiment of this application, the first guide structure 14 is a first linear guide pair 141, and the second guide structure 24 is a second linear guide pair 142. The first linear guide pair 141 is arranged parallel to the first transmission assembly 12. The mounting plate with the largest area of ​​the first pressing assembly 13 spans across the left and right sides of the first linear guide pair 141 and is fixedly connected to the slider of the first linear guide pair 141. When the first pressing assembly 13 moves along the lead screw with the first transmission assembly 12, the mounting plate slides along the slider of the first linear guide pair 141. The second linear guide pair 142 is arranged parallel to the second transmission assembly 22. The mounting plate with the largest area of ​​the second pressing assembly 23 spans across the left and right sides of the second linear guide pair 142 and is fixedly connected to the slider of the second guide pair 142. When the second pressing assembly 23 moves along the lead screw with the second transmission assembly 22, the mounting plate slides along the slider of the second linear guide pair 142.

[0054] In the second specific embodiment, the first guide structure 14 is a strip-shaped groove structure 143. The mounting plate with the largest area of ​​the first pressurizing component 13 spans the fixed portion of the strip-shaped groove structure 143 on both the left and right sides and is fixedly connected to the moving portion. When the first pressurizing component 13 moves along the rack fixed portion with the first transmission component 12, the mounting plate moves along the moving portion of the strip-shaped groove structure 143.

[0055] In this application, the guide structure supports and guides the transmission assembly, enabling the pressurizing assembly to move smoothly in a given direction, performing reciprocating linear motion. The linear guide rail has high precision, making the movement of the transmission assembly more accurate. The high rigidity of the linear guide rail allows the entire pressing mechanism to withstand greater loads and resist external interference. During the movement of the linear guide rail, the low friction ensures smooth movement. The strip-shaped groove structure 143 also basically possesses the above advantages and can bear greater loads.

[0056] like Figure 4 , Figure 9 and Figure 10 As shown, in the first and second embodiments, the first power assembly 11 further includes a first reducer 112, which is fixedly connected between the first motor 111 and the first rotary pair 121, and is used to control the speed of the first transmission assembly 12.

[0057] The second power assembly 21 also includes a second reducer 212, which is fixedly connected between the second motor 211 and the second rotary pair 221, and is used to control the speed of the second transmission assembly 22.

[0058] The first pressurizing component 13 includes a first pressure plate 131 that is slidably mounted on a first translation pair 122 of the first transmission component 12, and the first pressure plate 131 is perpendicular to the base 30;

[0059] The second pressurizing component 23 includes a second pressure plate 231 that is slidably mounted on the second translation pair 222 of the second transmission component 22, and the second pressure plate 231 is vertically disposed on the base 30.

[0060] In order to ensure the assembly quality of the battery cell module and to apply more uniform pressure to the module side plate 2 and module end plate 3 of the battery cell module 1 during assembly, the first pressure plate 131 and the second pressure plate 231 in this application both have a certain area and are set perpendicular to the body 30.

[0061] In use, the battery cells are stacked sequentially on the mounting base plate 31, with the module end plate 3 positioned in front of the first pressure plate 131 and the module side plate 2 positioned in front of the second pressure plate 231. The motor of the first power assembly 11 is connected to a right-angle reducer 112, driving the first transmission assembly 12 to rotate the lead screw or gear left and right, thus moving the first pressure plate 131 synchronously towards the center to press the battery cells to the specified length. During the process, a pressure sensor 40 monitors the pressing force. The servo motor of the first power assembly 21 is connected to a 16-T type lead screw, driving the left-hand lead screw, right-hand lead screw, or gear, thus moving the module side plates 2 on both sides and the second pressure plate 231 synchronously towards the center to press the battery cells to the specified width.

[0062] The assembly device for battery cell modules in this application can achieve synchronous pressing in two directions, namely the module end plate 3 and the module side plate 2, so that the battery cell module is subjected to uniform force and has high mechanical transmission efficiency. It has a simple structure and large output force, which can meet the assembly requirements of battery cell modules with a pressing force of more than 1t. In the technical solution of this application, the power motor is a servo motor with high control precision, which can achieve precise control of the dimensions required for battery cell module assembly. The lead screw or rack guide has a long stroke, which can be compatible with the assembly requirements of battery cell modules of various specifications.

[0063] The preferred embodiments of this application have been described in detail above. However, this application is not limited to the specific details of the above embodiments. Within the scope of the technical concept of this application, various simple modifications can be made to the technical solution of this application, and these simple modifications all fall within the protection scope of this application.

[0064] It should also be noted that the various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, this application will not describe the various possible combinations separately.

[0065] Furthermore, various different embodiments of this application can be combined in any way, as long as they do not violate the spirit of this application, they should also be regarded as the content disclosed by this utility model.

Claims

1. An assembly apparatus for battery cell modules, characterized in that, It includes a first pressing mechanism (10) and a second pressing mechanism (20) whose linear movement direction is perpendicular to the linear movement direction of the first pressing mechanism (10), and also includes a base (30) and a mounting base plate (31) for placing the battery cell module. The first pressing mechanism (10) and the second pressing mechanism (20) are fixedly disposed on the base (30). The first pressing mechanism (10) and the second pressing mechanism (20) move linearly synchronously and can be controlled separately; The first pressing mechanism (10) and the second pressing mechanism (20) apply pressure by converting rotational motion into linear motion to perform the pressing action; The first pressing mechanism (10) includes a first power component (11) and a first transmission component (12) fixedly disposed on the base (30), and at least two first pressurizing components (13) symmetrically disposed and detachably fixedly connected to the first transmission component (12). The at least two first pressurizing components (13) move synchronously towards each other under the control of the first power component (11). The second pressing mechanism (20) includes a second power component (21) and a second transmission component (22) fixedly disposed on the base (30), and at least two symmetrically arranged second pressurizing components (23) detachably fixedly connected to the second transmission component (22). The at least two second pressurizing components (23) move synchronously towards each other under the control of the second power component (21). A mounting base plate (31) is provided between the two first pressurization components (13).

2. The assembly apparatus for battery cell modules according to claim 1, characterized in that, The first pressurizing component (13) moves along the length direction of the first transmission component (12); The second pressurizing component (23) moves along the length of the second transmission component (22); The assembly device also includes a sensor (40) for detecting pressure values.

3. The assembly apparatus for battery cell modules according to claim 2, characterized in that, The first transmission component (12) and / or the second transmission component (22) are transmission methods of ball spline pair, ball screw pair or gear rack pair.

4. The assembly apparatus for battery cell modules according to claim 3, characterized in that, The first pressing mechanism (10) further includes a first guide structure (14) arranged parallel to the length direction of the first transmission assembly (12). The first guide structure (14) is fixedly and detachably disposed on the base (30) and slides in contact with the first pressing assembly (13) to move the first pressing assembly (13) along the length direction of the first transmission assembly (12). The second pressing mechanism (20) further includes a second guide structure (24) arranged parallel to the length direction of the second transmission assembly (22). The second guide structure (24) is fixedly and detachably disposed on the base (30) and slides in contact with the second pressurizing assembly (23) to move the second pressurizing assembly (23) along the length direction of the second transmission assembly (22).

5. The assembly apparatus for battery cell modules according to claim 4, characterized in that, The first guide structure (14) and / or the second guide structure (24) are a first linear guide pair (141), a second linear guide pair (142), or a strip groove structure (143).

6. The assembly apparatus for battery cell modules according to claim 1 or 5, characterized in that, The first power assembly (11) includes a first motor (111), the transmission shaft of the first motor (111) is fixedly connected to the first transmission assembly (12), and is used to drive the first rotary pair (121) of the first transmission assembly (12) to rotate. The second power assembly (21) includes a second motor (211), the transmission shaft of which is fixedly connected to the second transmission assembly (22) for driving the second rotary pair (221) of the second transmission assembly (22) to rotate.

7. The assembly apparatus for battery cell modules according to claim 6, characterized in that, The first power assembly (11) also includes a first reducer (112), which is fixedly connected between the first motor (111) and the first rotary pair (121) and is used to control the speed of the first transmission assembly (12); The second power assembly (21) also includes a second reducer (212), which is fixedly connected between the second motor (211) and the second rotary pair (221) and is used to control the speed of the second transmission assembly (22).

8. The assembly apparatus for a battery cell module according to any one of claims 1 or 7, characterized in that, The first pressurizing component (13) includes a first pressure plate (131) slidably mounted on a first translation pair (122) of the first transmission component (12), and the first pressure plate (131) is perpendicular to the base (30); The second pressurizing component (23) includes a second pressure plate (231) slidably mounted on the second translation pair (222) of the second transmission component (22), and the second pressure plate (231) is vertically disposed on the base (30).

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