Battery cell extrusion tool

Abstract

The utility model belongs to the technical field of battery production, and discloses a battery cell extrusion tool. The battery cell extrusion tool comprises a base, a fixed pressing plate and an extrusion assembly, the fixed pressing plate and the extrusion assembly are oppositely arranged on the base, a plurality of stacked battery cells are contained between the fixed pressing plate and the extrusion assembly, and the output end of the extrusion assembly can move in the direction close to the fixed pressing plate so as to extrude the multiple battery cells; a pressure sensor is arranged on the side, close to the extrusion assembly, of the fixed pressing plate and used for detecting extrusion force borne by the battery cells, and a displacement sensor is arranged on the extrusion assembly and used for detecting displacement generated after the multiple battery cells are extruded. According to the battery core extrusion tool, a pressure and displacement relation curve of the battery core in the extrusion process can be obtained, the extrusion process of the battery core can be monitored by comparing the pressure and displacement relation curve with an ideal curve, an operator can quickly identify abnormity occurring when the battery core is stacked, the risk of abnormal installation of a steel belt is reduced, and the pressure sensor is used for detecting the pressure and displacement of the battery core. And the battery cell can be prevented from being damaged by overlarge extrusion force.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to a battery core extrusion tool. Background Art

[0002] During the manufacturing process of the battery module, a certain number of battery cells need to be stacked together, and an insulating sheet needs to be set between every two adjacent battery cells. The stacked battery cells are then placed on a battery extrusion tool for extrusion to deform the insulating sheets between the battery cells. The steel belt is then installed in the desired position and tightened to fix the battery module.

[0003] The existing battery cell extrusion tooling has difficulty in controlling the extrusion force when extruding the battery cells, which can easily damage the battery cells. In addition, during the battery cell stacking process, if there are too many or missing insulating sheets, it is difficult for operators to identify them, which ultimately leads to abnormal installation of the steel strip, affecting the production efficiency and quality of the product.

[0004] Therefore, there is an urgent need to provide a battery cell extrusion tooling to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a battery cell extrusion tool, which can quickly identify some abnormalities occurring during battery cell stacking through a relationship curve between pressure and displacement, reduce the risk of steel strip installation abnormalities, and prevent the battery cells from being damaged by excessive extrusion pressure.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A battery cell extrusion tool, comprising a base, and a fixed pressing plate and an extrusion assembly arranged on the base at a relative interval, wherein the fixed pressing plate and the extrusion assembly are used to accommodate a plurality of stacked battery cells, and an output end of the extrusion assembly can move toward a direction close to the fixed pressing plate to extrude the plurality of battery cells;

[0008] A pressure sensor is provided on one side of the fixed pressure plate close to the extrusion assembly, and the pressure sensor is used to detect the extrusion force applied to the battery cell. A displacement sensor is provided on the extrusion assembly, and the displacement sensor is used to detect the displacement of the multiple battery cells after being extruded.

[0009] As an optional solution, the extrusion assembly includes:

[0010] A first mounting seat, disposed on the base;

[0011] A driving member, fixedly connected to the first mounting seat;

[0012] The movable pressing plate is connected to the output end of the driving member, and the driving member can drive the movable pressing plate to move toward the fixed pressing plate to squeeze the battery cell, and the displacement sensor is arranged on the movable pressing plate.

[0013] As an optional solution, the driving member is a linear motor.

[0014] As an optional solution, the output end of the driving member is connected to a push head, and the movable pressing plate is fixedly connected to a side of the push head away from the driving member.

[0015] As an optional solution, the extrusion assembly also includes a guide component, which includes a guide rod and a guide sleeve. The guide sleeve is arranged on the first mounting seat, one end of the guide rod is passed through the guide sleeve and is fixedly connected to the movable pressure plate, and the guide rod and the guide sleeve are slidably matched.

[0016] As an optional solution, one end of the guide rod away from the movable pressing plate is connected to a limiting member.

[0017] As an optional solution, the extrusion assembly includes multiple groups of the guide components, and the multiple groups of the guide components are arranged at intervals.

[0018] As an optional solution, a pad is provided on the base, and the multiple battery cells are placed on the pad. A steel belt is provided around the side of the pad, and the steel belt is used to fix the multiple battery cells after extrusion.

[0019] As an optional solution, the base includes a bottom plate and a mounting plate that are stacked, and the fixed pressure plate and the extrusion assembly are both arranged on the mounting plate.

[0020] As an optional solution, a plurality of weight-reducing holes are provided on the mounting plate.

[0021] Beneficial effects of the utility model:

[0022] The utility model provides a battery cell extrusion tool. When in use, the output end of the extrusion assembly first pushes a plurality of battery cells to move in a direction close to a fixed pressing plate. At this time, the battery cells compress a displacement sensor, and the pressure sensor is not subjected to force. As the extrusion assembly moves, when the battery cells abut against the pressure sensor, the fixed pressing plate and the extrusion assembly cooperate to start extruding the battery cells, and the pressure sensor starts to be subjected to force, so as to detect the extrusion force exerted on the battery cells in real time. At this time, the displacement sensor at the other end also starts to detect the displacement of the plurality of battery cells after being extruded in real time, so that a pressure and displacement relationship curve of the battery cells in the extrusion process can be obtained. By comparing with an ideal curve, the battery cell extrusion process can be monitored in real time. An operator can quickly identify some abnormalities that occur when the battery cells are stacked, that is, whether the insulating sheets between adjacent battery cells are over-installed or missed, thereby reducing the risk of abnormal installation of steel strips and improving production efficiency. Moreover, through the pressure sensor, the battery cells can be prevented from being damaged by excessive extrusion force, so as to ensure product quality. When the pressure sensor detects that the extrusion force reaches a preset value, the extrusion assembly stops extrusion, and the steel strip is installed at a desired position for tightening, so as to fix and form a battery module. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the battery cell extrusion tooling provided by the utility model in a first viewing angle;

[0024] Figure 2 It is a structural schematic diagram of the battery core extrusion tooling provided by the utility model at a second viewing angle.

[0025] In the figure:

[0026] 100. Battery cell;

[0027] 10. Base; 11. Bottom plate; 12. Mounting plate; 121. Weight reduction hole; 13. Second mounting seat; 14. Cushion block; 15. Steel belt; 20. Fixed pressing plate;

[0028] 30. Extrusion assembly; 31. First mounting seat; 32. Driving member; 33. Moving pressing plate; 34. Pushing head; 35. Guide member; 351. Guide rod; 352. Guide sleeve; 353. Limiting member;

[0029] 40. Pressure sensor; 50. Displacement sensor. DETAILED DESCRIPTION

[0030] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0031] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" 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, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0033] In the description of this embodiment, the terms "upper", "lower", "right", etc., are based on the directions or positions shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0034] This embodiment provides a battery cell extrusion tooling, such as Figure 1 and Figure 2 As shown, the battery cell extrusion tooling includes a base 10 and a fixed pressing plate 20 and an extrusion assembly 30 which are relatively spaced apart and arranged on the base 10. The fixed pressing plate 20 is fixed to the base 10 through a second mounting seat 13. The fixed pressing plate 20 and the extrusion assembly 30 are used to accommodate a plurality of stacked battery cells 100 ( Figure 1 and Figure 2 Only some of the battery cells 100 are shown in the figure, and an insulating sheet needs to be arranged between each two adjacent battery cells 100. The insulating sheet is usually a deformable silicone pad to ensure insulation between the battery cells 100. The fixed pressing plate 20 is fixed and the output end of the extrusion assembly 30 can move in the direction close to the fixed pressing plate 20 (X-axis direction) to jointly extrude multiple battery cells 100 to stack them to form a battery cell group, appropriately reducing the length of the battery cell group, thereby facilitating the operator to put the steel belt 15 on the battery cell group along the height direction of the battery cell group, thereby completing the bundling and fixation of the battery cell group.

[0035] like Figure 1 and Figure 2 As shown, a pressure sensor 40 is provided on one side of the fixed pressing plate 20 close to the pressing assembly 30. The pressure sensor 40 is used to detect the pressing force on the battery cell 100. A displacement sensor 50 is provided on the pressing assembly 30. The displacement sensor 50 is used to detect the displacement of the multiple battery cells 100 after being pressed. When the pressing assembly 30 moves and squeezes the battery cell 100 together with the fixed pressing plate 20, the battery cell 100 will be subjected to the pressing force. The pressure sensor 40 is used to detect the pressing force. When the battery cell 100 is squeezed, the insulating sheet between the adjacent battery cells 100 will also be squeezed. The insulating sheet will be deformed after being squeezed, so that the entire battery cell group will be displaced. The displacement sensor 50 is used to detect the displacement.

[0036] The battery cell extrusion tooling also includes a control module, and the pressure sensor 40 and the displacement sensor 50 are electrically connected to the control module respectively. The pressure sensor 40 feeds back the detected pressure data to the control module, and the displacement sensor 50 feeds back the detected displacement data to the control module. The control module can fit the pressure and displacement data to a relationship curve between pressure and displacement (for example, the X-axis of the coordinate system is the displacement, and the Y-axis of the coordinate system is the relationship curve between pressure), and monitor in real time through the upper computer interface of the control module. Among them, the control module is a prior art, and the present application can adopt any control module and electrical connection method that can achieve the above-mentioned effect, which will not be repeated here.

[0037] It is understandable that different specifications of steel strips 15 match different preset numbers of battery cells 100, and finally form battery modules of different specifications. Before actual manufacturing, it is necessary to conduct a test process for each specification of battery module, that is, stack a preset number of battery cells 100, accurately set an insulating sheet between each adjacent two battery cells 100, and extrude and test them through the above-mentioned battery cell extrusion tooling, so as to obtain an ideal curve of the relationship between pressure and displacement of the battery cell 100 during the extrusion process. In the actual manufacturing process, the real-time pressure-displacement relationship curve is compared with the ideal curve, so as to perform real-time monitoring.

[0038] When in use, the output end of the squeezing assembly 30 first pushes the multiple battery cells 100 to move in the direction close to the fixed pressure plate 20. At this time, the battery cells 100 compress the displacement sensor 50, and the pressure sensor 40 is not subjected to force. As the squeezing assembly 30 moves, when the battery cells 100 abut against the pressure sensor 40, the fixed pressure plate 20 and the squeezing assembly 30 cooperate to start squeezing the battery cells 100, and the pressure sensor 40 starts to be subjected to force to detect the squeezing force on the battery cells 100 in real time. At this time, the displacement sensor 50 at the other end also starts to detect the displacement of the multiple battery cells 100 after being squeezed in real time, so that the relationship between the pressure and displacement of the battery cells 100 during the squeezing process can be obtained. Curve, by real-time comparison with the above-mentioned ideal curve, can monitor the extrusion process of the battery cell 100 in real time and give timely alarm, the operator can quickly identify some abnormalities when the battery cells 100 are stacked, that is, whether the insulating sheets between adjacent battery cells 100 are over-installed or missing, thereby reducing the risk of abnormal installation of the steel strip 15 and improving production efficiency, and through the pressure sensor 40, it can prevent the battery cell 100 from being damaged by excessive extrusion pressure, thereby ensuring product quality. When the pressure sensor 40 detects that the extrusion pressure reaches the preset value, the extrusion assembly 30 stops extrusion, and the steel strip 15 can be installed to the desired position and tightened, thereby fixing and forming a battery module.

[0039] In an optional embodiment, if Figure 1 and Figure 2 As shown, the extrusion assembly 30 includes a first mounting seat 31, a driving member 32 and a movable pressing plate 33. The first mounting seat 31 is arranged on the base 10; the driving member 32 is fixedly connected to the first mounting seat 31; the movable pressing plate 33 is connected to the output end of the driving member 32, and the driving member 32 can drive the movable pressing plate 33 to move in the direction close to the fixed pressing plate 20 (X-axis direction) to squeeze the battery cell 100, and the displacement sensor 50 is arranged on the movable pressing plate 33. Among them, one end of the displacement sensor 50 extends out of the movable pressing plate 33 and can contact the battery cell 100. The end of the displacement sensor 50 is elastic. When the battery cell 100 contacts the displacement sensor 50, the displacement sensor 50 will be compressed and finally abut against the movable pressing plate 33. During the driving process of the driving member 32, the movable pressing plate 33 will push the battery cell 100 to move along the X-axis direction. The above-mentioned setting can realize the automatic extrusion process of the battery cell 100, improve the manufacturing efficiency, save labor costs, and reduce the error rate.

[0040] Among them, the pressure sensor 40 is communicated with the driving member 32 through the control module. The pressure sensor 40 feeds back the extrusion force exerted on the battery cell 100 to the control module, and the control module controls the driving member 32 to stop or retract in time to control the pressure within an appropriate range to prevent deformation and damage of the battery cell 100.

[0041] In an optional embodiment, the driving member 32 may be a linear motor. A linear motor does not need to go through an intermediate conversion mechanism to directly generate linear motion, which greatly simplifies the structure, reduces the motion inertia, greatly improves the dynamic response performance and positioning accuracy, and also improves reliability, saves costs, and makes manufacturing and maintenance easier. In another optional embodiment, the driving member 32 may also be any driving structure that realizes linear motion, such as a cylinder, a linear module, etc., which is not specifically limited here.

[0042] In an optional embodiment, if Figure 1 and Figure 2 As shown, the output end of the driving member 32 is connected to a pusher head 34, and the movable pressing plate 33 is fixedly connected to the side of the pusher head 34 away from the driving member 32. The pusher head 34 plays the role of an intermediate transition connection between the output end of the driving member 32 and the movable pressing plate 33, which can compensate for some position deviations and make the structural layout more reasonable.

[0043] In an optional embodiment, if Figure 1 and Figure 2 As shown, the extrusion assembly 30 further includes a guide component 35, which includes a guide rod 351 and a guide sleeve 352. The guide sleeve 352 is disposed on the first mounting seat 31. The guide rod 351 extends along the X-axis. One end of the guide rod 351 is passed through the guide sleeve 352 and is fixedly connected to the movable pressing plate 33. The guide rod 351 and the guide sleeve 352 are slidably matched. When the driving member 32 drives the movable pressing plate 33 to move along the X-axis, the movable pressing plate 33 can drive the guide rod 351 to slide along the guide sleeve 352, thereby guiding the movement of the movable pressing plate 33 to avoid movement deviation.

[0044] In an optional embodiment, if Figure 2 As shown, the extrusion assembly 30 includes a plurality of guide components 35, and the plurality of guide components 35 are arranged at intervals. Figure 2 As shown, the extrusion assembly 30 includes four groups of guide components 35, and the four groups of guide components 35 are evenly surrounded by the peripheral side of the driving member 32, so as to ensure the stability and reliability of the movement of the movable platen 33. In other embodiments, the guide components 35 can also be set to two groups, three groups, five groups or more groups, which can be flexibly set according to actual needs, and no specific limitation is made here.

[0045] In an optional embodiment, if Figure 1 and Figure 2 As shown, one end of the guide rod 351 away from the movable pressing plate 33 is threadedly connected to a limit member 353. When the guide rod 351 moves to the limit position along the X-axis direction, the limit member 353 can abut against the guide sleeve 352, thereby preventing the guide rod 351 from falling out of the guide sleeve 352. Optionally, two adjacent guide rods 351 can share a limit member 353, which reduces the number of structural parts and makes installation more convenient and quick.

[0046] In an optional embodiment, if Figure 1 and Figure 2 As shown, a cushion block 14 is provided on the base 10, and a plurality of battery cells 100 are placed on the cushion block 14. A steel belt 15 is provided around the cushion block 14, and the steel belt 15 is used to fix the plurality of battery cells 100 after extrusion. Before the steel belt 15 is put on, the steel belt 15 is located directly below the battery cell group. After the extrusion assembly 30 extrudes the battery cell group, the operator lifts the steel belt 15 and puts the steel belt 15 on the battery cell group from bottom to top, thereby completing the bundling and fixing of the battery cell group, and the operation is convenient and quick.

[0047] In an optional embodiment, if Figure 1 and Figure 2 As shown, the base 10 includes a stacked bottom plate 11 and a mounting plate 12, the fixed pressure plate 20 and the extrusion assembly 30 are both arranged on the mounting plate 12, specifically, the first mounting seat 31 and the second mounting seat 13 are both fixed on the mounting plate 12. The mounting plate 12 is used for installing structural parts on the tooling, and the bottom plate 11 is used to fix the entire tooling on the workbench, and the double-layer plate has high structural strength and better structural stability.

[0048] In an optional embodiment, if Figure 1 and Figure 2 As shown, a plurality of weight-reducing holes 121 are provided on the mounting plate 12. The weight-reducing holes 121 can reduce the overall weight of the battery cell extrusion tooling and achieve a lightweight design.

[0049] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the scope of protection of the present invention. It is not necessary and impossible to list all implementation methods here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall be included in the scope of protection of the claims of the present invention.

Claims

1. Battery cell extrusion tooling, characterized in that: The invention comprises a base (10), and a fixed pressing plate (20) and an extrusion assembly (30) which are arranged on the base (10) at a relative interval, wherein a plurality of stacked battery cells (100) are accommodated between the fixed pressing plate (20) and the extrusion assembly (30), and an output end of the extrusion assembly (30) can move in a direction close to the fixed pressing plate (20) so as to extrude the plurality of battery cells (100); A pressure sensor (40) is provided on one side of the fixed pressing plate (20) close to the extrusion assembly (30), and the pressure sensor (40) is used to detect the extrusion force exerted on the battery cell (100). A displacement sensor (50) is provided on the extrusion assembly (30), and the displacement sensor (50) is used to detect the displacement of the plurality of battery cells (100) after being extruded.

2. The battery cell extrusion tooling according to claim 1, characterized in that: The extrusion assembly (30) comprises: A first mounting seat (31) is disposed on the base (10); A driving member (32) fixedly connected to the first mounting seat (31); A movable pressing plate (33) is connected to the output end of the driving member (32), and the driving member (32) can drive the movable pressing plate (33) to move in a direction close to the fixed pressing plate (20) to squeeze the battery cell (100), and the displacement sensor (50) is arranged on the movable pressing plate (33).

3. The battery cell extrusion tooling according to claim 2, characterized in that: The driving member (32) is a linear motor.

4. The battery cell extrusion tooling according to claim 2, characterized in that: The output end of the driving member (32) is connected to a push head (34), and the movable pressing plate (33) is fixedly connected to a side of the push head (34) away from the driving member (32).

5. The battery cell extrusion tooling according to claim 2, characterized in that: The extrusion assembly (30) further comprises a guide component (35), wherein the guide component (35) comprises a guide rod (351) and a guide sleeve (352), wherein the guide sleeve (352) is arranged on the first mounting seat (31), one end of the guide rod (351) is passed through the guide sleeve (352) and is fixedly connected to the movable pressing plate (33), and the guide rod (351) and the guide sleeve (352) are slidably matched.

6. The battery cell extrusion tooling according to claim 5, characterized in that: One end of the guide rod (351) away from the movable pressing plate (33) is connected to a limiting member (353).

7. The battery cell extrusion tooling according to claim 5, characterized in that: The extrusion assembly (30) comprises a plurality of groups of guide components (35), and the plurality of groups of guide components (35) are arranged at intervals.

8. The battery cell extrusion tooling according to any one of claims 1 to 7, characterized in that: A cushion block (14) is provided on the base (10), and a plurality of the battery cells (100) are placed on the cushion block (14). A steel belt (15) is provided around the cushion block (14), and the steel belt (15) is used to fix the plurality of battery cells (100) after extrusion.

9. The battery cell extrusion tooling according to any one of claims 1 to 7, characterized in that: The base (10) comprises a bottom plate (11) and a mounting plate (12) which are stacked, and the fixed pressing plate (20) and the extrusion assembly (30) are both arranged on the mounting plate (12).

10. The battery cell extrusion tooling according to claim 9, characterized in that: The mounting plate (12) is provided with a plurality of weight-reducing holes (121).

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