Automatic sealing device for square cylindrical battery

Abstract

The utility model discloses an automatic square cylindrical battery sealing device which comprises a workbench, a feeding groove is formed in the center of the upper surface of the workbench, a first clamping assembly and a second clamping assembly which are the same in structure are symmetrically arranged on the two sides of the feeding groove, and a stamping assembly is arranged over the feeding groove. A plurality of clamping grooves which are evenly distributed are formed in the two sides of the feeding groove, the first clamping assembly comprises a first driver and a first clamping plate, and first notches corresponding to the clamping grooves in a one-to-one mode are formed in one side of the first clamping plate. By the adoption of the automatic sealing device for the square cylindrical battery, the depth of the steel ball sinking into the liquid injection hole is unified, the problem that the qualified rate of battery hole sealing is low is solved, and the sealing efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of battery production, in particular to an automatic sealing device for square cylindrical batteries. Background Art

[0002] Square cylindrical batteries are generally lithium titanate batteries. After the formation process, a passivation layer, namely the solid electrolyte interface film (SEI film), is formed on the surface of the negative electrode. Lithium titanate batteries produce more gas during the formation process. Since the force-bearing areas of each surface of the square bead battery are different, it is easy to cause inflation and deformation.

[0003] In addition, there is an injection hole on the negative battery cover, and the electrolyte is injected into the battery through the injection hole. After the injection, the injection hole needs to be sealed with a stainless steel ball to prevent leakage. In the prior art, the sealing is generally performed by manually knocking the steel ball. This method has the following problems:

[0004] (1) The steel ball cannot be quickly and accurately placed into the battery filling hole, and the sealing efficiency is low;

[0005] (2) The depth of the steel ball sinking into the injection hole cannot be controlled. If the steel ball sinks too deep or too shallow, the sealing effect will be poor. After the batteries are assembled into modules, it is very likely that one or more batteries will leak, which will reduce the performance of the entire module and greatly shorten its service life. Utility Model Content

[0006] The utility model aims to provide an automatic sealing device for square cylindrical batteries, which unifies the depth of steel balls sinking into injection holes, solves the problem of low battery sealing qualification rate, and greatly improves sealing efficiency.

[0007] To achieve the above object, the utility model provides an automatic sealing device for square cylindrical batteries, comprising a workbench, a feeding trough is arranged at the center of the upper surface of the workbench, a first clamping assembly and a second clamping assembly with the same structure are symmetrically arranged on both sides of the feeding trough, and a stamping assembly is arranged directly above the feeding trough;

[0008] A plurality of evenly distributed card slots are arranged on both sides of the feeding trough, the first clamping assembly comprises a first driver and a first clamping plate, and a first notch corresponding to the card slots is arranged on one side of the first clamping plate.

[0009] Preferably, the cross-sections of the first notch and the card slot are both V-shaped structures, the first driver includes a plurality of first drive shafts arranged in parallel, the first drive shafts are fixedly connected to the other side of the first clamping plate, the first drive shafts correspond to the first notches one by one, and each of the first drive shafts and each of the first notches are on the same vertical plane.

[0010] Preferably, the stamping assembly includes a pair of stamping plates and a plurality of steel ball needles, the stamping plate is an inverted U-shaped structure, the steel ball needles are arranged on the top inner surface of the stamping plate, the bottom of the stamping plate passes through the workbench, and a third driver is arranged on the lower surface of the workbench, the third driver includes four third drive shafts, and the penetrating end of the stamping plate is fixedly connected to the third drive shaft.

[0011] Preferably, legs are provided at the four corners of the lower surface of the workbench.

[0012] Preferably, the first driver is fixedly connected to the workbench via a mounting seat.

[0013] Preferably, a controller is also provided on the workbench, and the controller is electrically connected to the first clamping assembly, the second clamping assembly and the stamping assembly.

[0014] Therefore, the utility model adopts the above-mentioned square cylindrical battery automatic sealing device, unifies the depth of the steel ball sinking into the injection hole, solves the problem of low battery sealing qualification rate, and greatly improves the sealing efficiency. The technical solution of the utility model is further described in detail below through the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a structural schematic diagram of an embodiment of an automatic sealing device for square cylindrical batteries of the utility model;

[0016] Figure 2 This is a top view of an embodiment of an automatic sealing device for square cylindrical batteries of the utility model;

[0017] Figure 3 It is a side view of an embodiment of an automatic sealing device for square cylindrical batteries of the utility model;

[0018] Figure 4 The utility model is a schematic diagram of the structure of a battery in an embodiment of an automatic sealing device for square cylindrical batteries.

[0019] Reference numerals

[0020] 1. Workbench; 2. Support legs; 3. Loading trough; 4. Card slot; 5. First driver; 6. First clamping plate; 7. Mounting seat; 8. First notch; 9. First drive shaft; 10. Second driver; 11. Second clamping plate; 12. Second notch; 13. Second drive shaft; 14. Stamping plate; 15. Steel ball needle; 16. Third driver; 17. Third drive shaft; 18. Battery; 19. Cover plate; 20. Filling hole. DETAILED DESCRIPTION

[0021] The technical solution of the utility model is further described below through the accompanying drawings and embodiments.

[0022] Unless otherwise defined, the technical terms or scientific terms used in the present invention shall have the usual meanings understood by persons with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" and the like mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" and the like are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0023] As shown in the figure, an automatic sealing device for square cylindrical batteries includes a workbench 1, and legs 2 are arranged at the four corners of the lower surface of the workbench 1. A feeding trough 3 is arranged at the center of the upper surface of the workbench 1, and a first clamping assembly and a second clamping assembly with the same structure are symmetrically arranged on both sides of the feeding trough 3. A plurality of evenly distributed card slots 4 are arranged on both sides of the feeding trough 3.

[0024] Specifically, the first clamping assembly includes a first driver 5 and a first clamping plate 6, and the first driver 5 is fixedly connected to the workbench 1 through a mounting seat 7. One side of the first clamping plate 6 is provided with a first notch 8 corresponding to the card slot 4. The first driver 5 includes a plurality of first drive shafts 9 arranged in parallel, and the first drive shafts 9 are fixedly connected to the other side of the first clamping plate 6, and the first drive shafts 9 correspond to the first notches 8 one by one.

[0025] The second clamping assembly includes a second driver 10 and a second clamping plate 11, and the second driver 10 is fixedly connected to the workbench 1 through the mounting seat 7. One side of the second clamping plate 11 is provided with a second notch 12 corresponding to the card slot 4. The second driver 10 includes a plurality of second drive shafts 13 arranged in parallel, and the second drive shafts 13 are fixedly connected to the other side of the second clamping plate 11, and the second drive shafts 13 correspond to the second notches 12 one by one.

[0026] Each first drive shaft 9, each second drive shaft 13 and each first notch 8 are on the same vertical plane. The cross-sections of the first notch 8, the second notch 12 and the card slot 4 are all V-shaped structures. The space between the first notch 8 and the card slot 4 and between the second notch 12 and the card slot 4 are used to place the battery 18. The first notch 8, the second notch 12 and the card slot 4 are respectively in contact with the side surfaces of the battery 18 to ensure that each surface of the battery 18 is subjected to uniform force.

[0027] A stamping assembly is arranged just above the feeding trough 3. The stamping assembly includes a pair of stamping plates 14 and a plurality of steel ball needles 15. The stamping plate 14 is an inverted U-shaped structure. The steel ball needles 15 are arranged on the top inner surface of the stamping plate 14. The bottom of the stamping plate 14 passes through the workbench 1. A third driver 16 is arranged on the lower surface of the workbench 1. The third driver 16 includes four third drive shafts 17. The through end of the stamping plate 14 is fixedly connected to the third drive shaft 17. A cover plate 19 is arranged at the negative pole of the battery 18, and the center position of the cover plate 19 is the injection hole 20. The diameter of the steel ball needle 15 is the same as the inner diameter of the injection hole 20, and the steel ball needle 15 and the injection hole 20 are on the same vertical line for steel ball sealing.

[0028] A controller (not marked in the figure) is also provided on the workbench 1. The controller adopts a PLC controller. The controller is electrically connected to the first clamping assembly, the second clamping assembly and the stamping assembly, and is used to control the start and stop of the first driver 5, the second driver 10 and the third driver 16 and adjust related parameters (such as pressure value and travel distance).

[0029] In actual use, firstly, a certain number of batteries 18, such as six batteries 18 that have been filled with liquid, are placed in the card slot 4 of the feeding slot 3 by manual or other automatic feeding methods. Under the control of the controller, the first driver 5 drives the first drive shaft 9 to move the first clamping plate 6 toward the center. At the same time, the second driver 10 drives the second drive shaft 13 to move the second clamping plate 11 toward the center to clamp the side of the battery 18 to be sealed, and apply pressure to the side of the battery 18 to be sealed, so as to firmly position it in the card slot 4. Secondly, a corresponding number of steel balls are placed on the upper surface of the injection hole 20 of the battery 18 to be sealed by manual or other automatic feeding methods. The third driver 16 drives the third drive shaft 17 to make the stamping plate 14 drive the steel ball needle 15 to move downward. In this process, the pressure of the steel ball needle 15 is a preset value, and a fixed pressure value is applied to punch the steel ball into the injection hole 20, so that the battery 18 is sealed and the depth of each steel ball is the same. Finally, the steel ball needle 15 is reset under the driving of the third driver 16, and the first driver 5 and the second driver 10 respectively drive the first clamping plate 6 and the second clamping plate 11 to reset, and the battery 18 is taken out by manual or other automatic feeding methods. The next sealing process continues according to the above steps.

[0030] Therefore, the utility model adopts the above-mentioned square cylindrical battery automatic sealing device, unifies the depth of the steel ball sinking into the injection hole, solves the problem of low battery sealing qualification rate, and greatly improves the sealing efficiency.

[0031] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that they can still modify or replace the technical solution of the utility model with equivalents, and these modifications or equivalent replacements cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of the utility model.

Claims

1. An automatic sealing device for square cylindrical batteries, characterized in that: It comprises a workbench, wherein a feeding trough is arranged at the center of the upper surface of the workbench, a first clamping assembly and a second clamping assembly with the same structure are symmetrically arranged on both sides of the feeding trough, and a stamping assembly is arranged directly above the feeding trough; A plurality of evenly distributed card slots are arranged on both sides of the feeding trough, the first clamping assembly comprises a first driver and a first clamping plate, and a first notch corresponding to the card slots is arranged on one side of the first clamping plate.

2. The automatic sealing device for square cylindrical batteries according to claim 1, characterized in that: The cross-sections of the first notch and the card slot are both V-shaped structures. The first driver includes a plurality of first drive shafts arranged in parallel. The first drive shafts are fixedly connected to the other side of the first clamping plate. The first drive shafts correspond to the first notches one by one, and each of the first drive shafts and each of the first notches are on the same vertical plane.

3. The automatic sealing device for square cylindrical batteries according to claim 1, characterized in that: The stamping assembly includes a pair of stamping plates and a plurality of steel ball needles. The stamping plate is an inverted U-shaped structure. The steel ball needles are arranged on the top inner surface of the stamping plate. The bottom of the stamping plate passes through the workbench. A third driver is arranged on the lower surface of the workbench. The third driver includes four third drive shafts. The penetrating end of the stamping plate is fixedly connected to the third drive shaft.

4. The automatic sealing device for square cylindrical batteries according to claim 1, characterized in that: Support legs are arranged at the four corners of the lower surface of the workbench.

5. The automatic sealing device for square cylindrical batteries according to claim 1, characterized in that: The first driver is fixedly connected to the workbench via a mounting seat.

6. The automatic sealing device for square cylindrical batteries according to claim 1, characterized in that: A controller is also provided on the workbench, and the controller is electrically connected to the first clamping assembly, the second clamping assembly and the stamping assembly.

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