Fixing tool for battery case cutting

Abstract

The utility model relates to the field of tools, in particular to a fixing tool for cutting a battery case, which comprises a moulding bed, the bottom and the side wall of the moulding bed are matched with the surface shape of the contact part of the battery case, cavities and an exhaust pipeline are arranged in the moulding bed, the cavities are distributed at the bottom and the side wall of the moulding bed, and the exhaust pipeline is communicated with the cavities. By means of the profiling moulding bed which is arranged on the surface of the battery shell and matched with the surface of the battery shell in shape, the to-be-cut battery shell can be rapidly positioned through shape positioning, the battery shell can be firmly fixed through the cavities, the contact area is large, and the sealing performance is good. The surface of the battery shell is not easily damaged.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of tooling, specifically for a kind of fixed tooling for battery shell cutting. BACKGROUND

[0002] Mileage anxiety has been the headache of new energy vehicles, no matter which new car is listed, the limit mileage challenge is the difficult problem that it must pass.Reducing weight is one of the schemes to improve mileage endurance.It is generally believed that the weight of pure electric vehicle reduces 10%, and the endurance mileage can increase about 6%.The "three-electric" system of new energy vehicle accounts for about 1 / 4 of the total vehicle mass, and data shows that the weight of new energy vehicle designed on the basis of traditional vehicle will increase by more than 15% compared with traditional fuel vehicle, so lightweight is a more important issue for new energy vehicles than traditional vehicles.

[0003] In the power battery system, the battery shell accounts for about 20-30% of the total weight of the system, which is the main structural part, and significantly affects its power consumption, power performance, braking performance, passive safety, one-time charging endurance mileage, etc., so the lightweight of new energy vehicle battery shell is more important.Lightweight cannot be achieved without the application of lightweight materials such as composite materials.

[0004] For composite material battery shell, laser cutting is generally needed after forming to cut off the process reserved part of the battery shell to ensure that the product conforms to the drawing.The existing battery shell fixing tooling for laser cutting often uses suction cup group or clamping assembly to fix the battery shell before cutting, as only one product can be cut at a time, the suction cup group or clamping assembly needs to be loosened when changing the product, and the position of the battery shell needs to be repositioned before cutting, which is relatively cumbersome and inefficient.Secondly, in order to ensure the stable clamping of the battery shell, the clamping piece often needs to exert a large force on the battery shell, as the contact area between the clamping piece and the battery shell is small, it is easy to damage the surface of the battery shell.Although the suction cup group is not easy to damage the surface of the battery shell, the suction cup group needs to be combined with a support part to support the local position of the battery shell to improve stability during cutting, and the volume of the support part is generally small, so the position of the support part is easy to deviate after long-term use, causing overall position deviation, so the support part needs to be calibrated regularly. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the present application is to provide a fixed tooling for battery shell cutting, which is provided with an integrated mold that conforms to the shape of the surface of the battery shell, which can not only quickly position the battery shell to be cut through shape positioning, but also firmly fix the battery shell through the cavity, and the contact area is large, which is not easy to damage the surface of the battery shell.

[0006] The specific technical scheme of the application is a fixing tool for cutting a battery shell, comprising a mold, the bottom and the side wall of the mold are in contact with the surface shape of the contact part of the battery shell, the inside of the mold is provided with cavities and a gas extraction pipeline, the cavities are distributed in the bottom and the side wall of the mold, the cavities are in communication with each other to form an integral whole, the gas extraction pipeline is in communication with the cavities, and a sealing strip is arranged around the cavities.

[0007] Further, the mold is in the shape of U as a whole.

[0008] Further, the side of the mold is provided with a gas extraction hole, and the gas extraction pipeline converges into a main pipe inside the mold and is connected with the outside through the gas extraction hole.

[0009] Preferably, the bottom and the side wall of the mold are further provided with supporting soft pads at the contact part of the battery shell.

[0010] Preferably, the bottom of the mold is further provided with a suction cup, and the height of the suction cup is greater than the height of the sealing strip.

[0011] Preferably, a plurality of detection holes are uniformly distributed in the cavities, and a distance probe for detecting the deformation of the battery shell is fixed in the detection holes.

[0012] Preferably, the fixing tool further comprises a tool base plate, the tool base plate comprises a plurality of screw holes and four positioning reference points, and the positioning reference points are fixed at the four corners of the tool base plate through the screw holes.

[0013] Further preferably, the fixing tool further comprises a mold base plate, the mold is fixedly connected with the mold base plate, the mold base plate is also provided with a plurality of screw holes, the mold base plate and the tool base plate are fixed through the screw holes and bolts, and the four corners of the mold base plate are in abutment with the positioning reference points.

[0014] Further preferably, the tool base plate is further provided with a positioning hole, and the mold base plate is fixedly provided with a positioning device matched with the positioning hole.

[0015] Further preferably, the positioning device comprises a shell fixedly connected with the mold base plate, and the inside of the shell comprises a spring and a positioning nail, the spring is fixed at the top end of the positioning nail, the positioning nail is in sliding connection with the shell, the length of the positioning nail is greater than the thickness of the mold base plate, and the positioning nail is clamped into the positioning hole.

[0016] Compared with the prior art, the application has the following beneficial effects:

[0017] This application utilizes a mold that conforms to the shape of the battery casing surface. When the battery casing is placed, the mold can quickly position the casing to be cut by shape positioning, improving the efficiency of the battery casing cutting operation. Moreover, after the battery casing is placed, the cavity is evacuated, and because the cavities are interconnected, a stable and uniform negative pressure can be formed under the battery casing, which firmly adsorbs and fixes the battery casing. The large contact area between the battery casing and the mold provides stable support for the battery casing during the cutting operation and is not prone to damage to the surface of the battery casing. In addition, the integrated mold can also avoid the displacement phenomenon under long-term use, saving calibration time and costs for later maintenance. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of the battery case in its unadsorbed state according to an embodiment of this application;

[0019] Figure 2 This is a top view of the unattached battery casing state according to an embodiment of this application;

[0020] Figure 3 This is a cross-sectional view of the adsorption battery casing according to an embodiment of this application;

[0021] Figure 4 This is a schematic diagram of the suction cup structure in an embodiment of this application;

[0022] Figure 5 This is a schematic diagram of the positioning device structure in the embodiments of this application;

[0023] In the diagram: 1. Model; 2. Cavity; 3. Air extraction pipe; 4. Sealing strip; 5. Support pad; 6. Suction cup; 7. Detection hole; 8. Model base plate; 9. Positioning reference; 10. Tooling base plate; 11. Positioning device; 12. Positioning hole; 13. Housing; 14. Spring; 15. Positioning pin; 16. Disc; 17. Suction cup seat; 18. Bracket; 19. Air intake port; 20. Air extraction hole; 100. Battery casing. Detailed Implementation

[0024] 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, not all, of the embodiments of this utility model.

[0025] Therefore, the following detailed description of the embodiments of this utility model is not intended to limit the scope of the claimed utility model, but merely to illustrate some embodiments of the utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

[0026] Embodiment

[0027] Please see Figures 1 to 5 The embodiment provides a fixing tool for battery shell cutting, which comprises a mold 1, the mold 1 comprises a placing space, as shown in Figure 1 and Figure 3 The mold 1 is in a whole U shape, the placing space is a space surrounded by the U shape, the bottom and the side wall of the placing space are matched with the surface shape of the contact part of the battery shell 100, cavities 2 and a suction pipeline 3 are arranged in the placing space, the cavities 2 are distributed on the bottom and the side wall of the mold 1, the cavities 2 are in communication with each other and form a whole, the suction pipeline 3 is in communication with the cavities 2, and a sealing strip 4 is arranged around the cavities 2. By arranging the mold 1 matched with the surface shape of the battery shell 100, the battery shell 100 can be quickly positioned when placed, the efficiency of the cutting operation of the battery shell 100 is improved. Since the battery shell 100 is generally large in area, when placed in the mold 1, air under the battery shell 100 cannot be discharged in time, so that the placement of the battery shell 100 is hindered, the U-shaped mold 1 can discharge air from the side, and the battery shell 100 can be placed in the placing space more quickly. After the battery shell 100 is placed, the cavities 2 are suctioned, the bottom of the battery shell 100 is stably adsorbed and fixed due to the stable negative pressure formed by the sealing strip 4, the cavities 2 are also arranged on the side wall, so that the battery shell 100 is more closely attached to the mold 1, the contact area of the battery shell 100 and the mold 1 is large, and the mold 1 can provide stable support for the battery shell 100 and is not easy to damage the surface of the battery shell 100 during the cutting operation. The side of the mold 1 is provided with a suction hole 20, the suction pipeline 3 converges into a main pipeline in the mold 1, and the suction hole 20 is connected with an external vacuum pump or suction pump.

[0028] As shown in Figure 3 In the embodiment, further, the bottom and the side wall of the placing space are also fixed with a supporting soft pad 5 at the contact part of the battery shell 100. The supporting soft pad 5 can provide stable support for the battery shell 100, is not easy to damage the surface of the battery shell 100, and can avoid that the huge surface of the battery shell 100 is deformed too much during the adsorption.

[0029] As shown in Figure 4As shown in the preferred embodiment, a suction cup 6 is also provided at the bottom edge of the placement space that contacts the battery case 100. The suction cup 6 includes a plate body 16, a suction cup base 17, and a bracket 18. The upper part of the suction cup base 17 is fixed to the plate body 16, and the lower part of the suction cup 6 is a suction port 19. The bracket 18 is detachably connected to the suction cup base 17, thereby fixing the suction cup 6 to the mold 1. The top of the suction cup 6 needs to be slightly higher than the sealing strip 4. In this embodiment, the top of the suction cup 6 is 1 mm higher than the sealing strip 4. When the battery case 100 is placed into the mold 1, the battery case 100 first contacts the suction cup 6, and the suction cup 6 starts to adsorb the battery case 100, which plays a pre-fixing role for the battery case 100, preventing the battery case 100 from shifting due to uneven adsorption force caused by the shape difference of the battery case 100 during adsorption in the cavity 2.

[0030] As a further preferred embodiment, the cavity 2 is further provided with a plurality of evenly distributed detection holes 7, and a distance probe for detecting the deformation of the battery casing 100 is fixed in the detection holes 7. After the cavity 2 completes its alignment with the battery casing 100, the distance probe monitors the distance from the cavity 2 to the battery casing 100, which represents the deformation of the battery casing 100 at that point, thereby reflecting the adsorption force of the cavity 2. The monitoring threshold is set to 0.8-1 mm. When the distance probe detects a deformation exceeding 1 mm, it indicates that the adsorption force is too large, and the vacuuming needs to be stopped to maintain the current adsorption state; if the distance probe detects a deformation less than 0.8 mm, the vacuuming is restarted.

[0031] like Figures 1 to 3 As shown, this embodiment also includes a tooling base plate 10 and a mold base plate 8. The tooling base plate 10 includes several screw holes and four positioning references 9. The positioning references 9 are fixed to the four corners of the tooling base plate 10 through the screw holes. The mold 1 is fixedly connected to the mold base plate 8. The mold base plate 8 also has several screw holes. The mold base plate 8 and the tooling base plate 10 are fixed by screw holes and bolts. The four corners of the mold base plate 8 abut against the positioning references 9. Figure 5 As shown, the tooling base plate 10 is also provided with a positioning hole 12, and a positioning device 11 is fixed on the mold base plate 8 to match the positioning hole 12. The positioning device 11 includes a housing 13, which is fixed to the mold base plate 8. The housing 13 contains a spring 14 and a positioning pin 15. The spring 14 is fixed to the top of the positioning pin 15, and the positioning pin 15 is slidably connected to the housing 13. The length of the positioning pin 15 is greater than the thickness of the mold base plate 8, and the positioning pin 15 is engaged in the positioning hole 12.

[0032] Since the tool base plate 10 is fixed in a position and does not move during actual use, when the product is replaced, the tire mold base plate 8 and the tire mold 1 are usually replaced together, the tire mold 1 is fixedly connected with the tire mold base plate 8, and therefore only the tire mold base plate 8 needs to be accurately positioned. In the embodiment, the positioning device 11 is arranged to realize the rapid positioning of the tire mold base plate 8 and the tool base plate 10, thereby accelerating the replacement speed of the tire mold 1 and improving the overall efficiency of the cutting work.

[0033] Those skilled in the art should understand that the above discussion of any of the embodiments is only exemplary and is not intended to imply that the protection scope of the present application is limited to these examples; under the idea of the present application, the above embodiments or technical features in different embodiments can also be combined, the steps can be implemented in any order, and there are many other changes of different aspects of one or more embodiments of the present application as described above. In order to be brief, they are not provided in details.

[0034] One or more embodiments of the present application are intended to cover all such replacements, modifications and variations falling within the broad scope of the present application. Therefore, any omission, modification, equivalent replacement, improvement and the like made within the spirit and principles of one or more embodiments of the present application should be included in the protection scope of the present application.

Claims

1. A fixing tool for cutting a battery case, characterized by, The application relates to a tire mold (1) which is in contact with the surface shape of the contact part of a battery shell (100) at the bottom and the side wall of the tire mold (1), the inside of the tire mold (1) is provided with cavities (2) and air extraction pipelines (3), the cavities (2) are distributed on the bottom and the side wall of the tire mold (1), the cavities (2) are in communication with each other to form an integral whole, the air extraction pipelines (3) are in communication with the cavities (2), and the cavities (2) are provided with a sealing strip (4) which is arranged in a loop around the cavities (2).

2. The fixing tool for cutting a battery case according to claim 1, wherein The tire mold (1) is in a U shape as a whole.

3. The fixing tool for cutting a battery case according to claim 1, wherein Air extraction holes (20) are arranged on the side of the tire mold (1), the air extraction pipelines (3) are gathered into a main pipeline in the inside of the tire mold (1) and connected with the outside through the air extraction holes (20).

4. The fixing tool for cutting a battery case according to claim 1, wherein Supporting cushions (5) are further fixed on the contact part of the bottom and the side wall of the tire mold (1) and the battery shell (100).

5. The fixing tool for cutting a battery case according to claim 1, wherein Suction discs (6) are further arranged on the bottom of the tire mold (1), the height of the suction discs (6) is greater than the height of the sealing strip.

6. The fixing tool for cutting of a battery case according to claim 1, wherein A plurality of detection holes (7) are further arranged in the cavities (2) and uniformly distributed, distance probes for detecting the deformation amount of the battery shell (100) are fixed in the detection holes (7).

7. The fixing tool for cutting of a battery case according to claim 1, wherein The application further comprises a tool bottom plate (10) which comprises a plurality of screw holes and four positioning references (9), the positioning references (9) are fixed on the four corners of the tool bottom plate (10) through the screw holes.

8. The fixing tool for cutting a battery case according to claim 7, wherein The application further comprises a tire mold bottom plate (8), the tire mold (1) is fixedly connected with the tire mold bottom plate (8), the tire mold bottom plate (8) is also provided with a plurality of screw holes, and the tire mold bottom plate (8) and the tool bottom plate (10) are fixed through the screw holes and bolts.

9. The fixing tool for cutting of a battery case according to claim 8, wherein Positioning holes (12) are further arranged on the tool bottom plate (10), and positioning devices (11) matched with the positioning holes (12) are fixed on the tire mold bottom plate (8).

10. The fixing tool for cutting of a battery case according to claim 9, wherein The positioning device (11) comprises a shell (13), the shell (13) is fixed with the tire mold bottom plate (8), the inside of the shell (13) comprises a spring (14) and a positioning nail (15), the spring (14) is fixed on the top end of the positioning nail (15), the positioning nail (15) is in sliding connection with the shell (13), the length of the positioning nail (15) is greater than the thickness of the tire mold bottom plate (8), and the positioning nail (15) is clamped into the positioning hole (12).

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