Shell opening structure

Abstract

The utility model discloses a shell opening structure, and belongs to the technical field of battery performance testing. The shell opening structure comprises a base disc and a driving part; wherein a plurality of cutter bodies are arranged on the base disc at intervals, and cutting edges are arranged on the cutter bodies; the driving part is in driving connection with the base disc, the driving part is used for driving the base disc to rotate to drive the blades to circumferentially cut the shell of the battery so as to form round holes in the shell, and the blades do not make contact with battery cells in the shell. According to the shell opening structure, the blade is driven by the driving piece, so that the shell with certain hardness can be easily cut open, and time and labor are saved when the round hole of the shell is formed; meanwhile, the cutting edge, not on the periphery of the round hole, on the shell is not prone to tilting, the flatness of the surface of the shell is guaranteed, the tilting cutting edge on the shell is prevented from scratching workers, and safety is high; moreover, the blade is not in contact with the battery cell in the process of cutting the shell by the blade, so that the battery cell in the shell is not scratched in the process of cutting the shell, and the test result of the battery is relatively accurate.

Description

Technical Field

[0001] The utility model relates to the technical field of battery performance testing, in particular to an open shell structure. Background Art

[0002] After the battery is produced, its performance needs to be tested. When the battery is subjected to a collision test or a puncture test, a large opening needs to be made in the battery shell.

[0003] At present, a small opening is usually made manually on the surface of the shell, and then the middle area of ​​the shell is sheared off through the small opening to achieve a large opening on the shell.

[0004] However, since the shell has a certain hardness, it is not easy to cut it open, which is time-consuming and laborious. At the same time, it is easy to cause the cut edge of the shell to warp up, affecting the flatness of the shell surface, causing the raised cut edge to easily scratch the staff. In addition, during the cutting process, it is easy to scratch the battery cells inside the shell, affecting the test results of the battery.

[0005] In view of the above problems, an open shell structure is urgently needed to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to propose a shell opening structure, which saves time and effort in opening a circular hole in the shell, can avoid the cutting edge on the shell from scratching the staff, has high safety, and can ensure that the battery cell inside the shell will not be scratched during the shell cutting process.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The open shell structure is used to open a circular hole on the battery shell, and the battery cell is arranged in the shell, including:

[0009] A base plate, on which a plurality of knife bodies are arranged at intervals, and each knife body is provided with a knife edge;

[0010] A driving member is connected to the base disk for driving the base disk to rotate, so as to drive each of the blades to cut the shell circumferentially to form the circular hole on the shell, and the blades do not contact the battery core.

[0011] As an optional solution, a receiving groove is provided on the base plate, and each of the blade bodies is arranged on the outer periphery of the receiving groove, and the receiving groove is used to accommodate the shell that is deformed during cutting.

[0012] As an optional solution, the depth of the accommodating groove matches the deformation amount of the shell and the cutting depth of the blade respectively.

[0013] As an optional solution, the blade body includes a first blade body, the cross-sectional shape of the first blade body is a triangle, the bottom end of the first blade body is connected to the base plate, the first tip of the first blade body faces the shell, and the blade is arranged on the first tip.

[0014] As an optional solution, the distance between the first tip and the base plate is less than or equal to the thickness of the shell.

[0015] As an optional solution, the blade body includes a second blade body, the second blade body has a top surface and two side surfaces, the two side surfaces are respectively located on opposite sides of the top surface, the bottom ends of the side surfaces are connected to the base plate, the top ends of the side surfaces are connected to the top surface, the two side surfaces gradually approach and are connected to the top surface to form a second tip, and the blade is arranged on the second tip.

[0016] As an optional solution, the length of the second tip is less than or equal to the thickness of the shell.

[0017] As an optional solution, the top surface includes a transition surface and a connecting surface, one end of the connecting surface is connected to the base plate, and the other end of the connecting surface is connected to the transition surface, the transition surface is arranged close to the second tip, and relative to the base plate, the inclination of the connecting surface is greater than the inclination of the transition surface.

[0018] As an optional solution, the angle between the connecting surface and the base plate is 4°-12°, and the angle between the transition surface and the base plate is 2°-10°.

[0019] As an optional solution, the open shell structure further includes:

[0020] A connecting member, wherein the driving member is drivingly connected to one end of the connecting member, the other end of the connecting member is connected to the base plate, and the center of the connecting member is aligned with the center of the base plate.

[0021] The beneficial effects of the utility model are:

[0022] By arranging a plurality of blades at intervals on a base plate, a driving member drives the base plate to rotate, so as to drive the blades of the blades on the base plate to synchronously and circumferentially cut the battery shell to form a circular hole on the shell, through which a collision test or a needle puncture test is conveniently performed on the battery; since the driving member drives the blade to easily cut the shell with a certain hardness, it is time-saving and labor-saving to open the circular hole in the shell; at the same time, it is not easy to cause the cutting edge of the shell that is not in contact with the outer circumference of the circular hole to be lifted up, so the flatness of the shell surface is ensured, and the lifted cutting edge of the shell is prevented from scratching the staff, so that the safety is higher; and since the blade does not contact the battery cell during the process of cutting the shell, it is ensured that the battery cell located inside the shell will not be scratched during the process of cutting the shell, so that the test result of the battery is ensured to be more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the structure of the open shell structure (with a first blade body) provided by the utility model. Figure 1 ;

[0024] Figure 2 This is a schematic diagram of the structure of the open shell structure (with a second blade body) provided by the utility model. Figure 2 ;

[0025] Figure 3 It is a structural schematic diagram of the second knife body provided by the utility model.

[0026] Description of reference numerals:

[0027] 1-base plate; 11-accommodating groove;

[0028] 2-first blade body; 21-first tip;

[0029] 3-second blade body; 31-top surface; 311-connecting surface; 312-transition surface; 32-side surface; 33-second tip; 4-connecting piece. DETAILED DESCRIPTION

[0030] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.

[0031] Any feature disclosed in this specification, unless otherwise stated, may be replaced by other equivalent or alternative features having similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features. Throughout the specification, the same reference numerals indicate the same elements.

[0032] In order to make the technical problems solved by the present invention, the technical solutions adopted and the technical effects achieved more clearly, the technical solutions of the present invention are further explained below with reference to the accompanying drawings and through specific implementation methods.

[0033] At present, a small cut is usually made on the surface of the battery shell manually, and then the middle area of ​​the shell is cut through the small cut to achieve a large opening on the shell; however, since the shell has a certain hardness, it is not easy to cut it open, which is time-consuming and laborious; at the same time, it is easy to cause the cut edge of the shell to warp up, affecting the flatness of the shell surface, causing the warped cut edge to easily scratch the staff; and in the process of cutting, the battery cell inside the shell is easily scratched, affecting the test results of the battery.

[0034] In order to solve the above problems, an open shell structure is proposed in this embodiment, which is used to open a circular hole on the shell of the battery, and a battery cell is arranged in the shell, that is, the battery includes a shell and a battery cell, and the circular hole can be used to facilitate the collision test or needle puncture test of the battery. In this embodiment, the battery can be specifically an aluminum shell battery, that is, the shell is an aluminum shell with a certain hardness, and the specific structure of the shell is not limited here.

[0035] Specifically, if Figure 1 As shown, the shell opening structure includes a base plate 1 and a driving member; wherein, a plurality of blades are arranged at intervals on the base plate 1, that is, the plurality of blades are distributed in a ring shape, and a blade is arranged on each blade body; the driving member is drivingly connected to the base plate 1, and the driving member is used to drive the base plate 1 to rotate, so as to drive the blades on the base plate 1 to cut the shell circumferentially, so as to cut and form a circular hole on the shell, and the blade will not contact the battery cell in the shell.

[0036] Compared with the prior art, the shell opening structure in this embodiment changes the cutting method of the shell; the blade driven by the driving member can easily cut open the shell with a certain hardness, making it time-saving and labor-saving to open the circular hole in the shell; at the same time, it is not easy to cause the cutting edge of the shell that is not in contact with the outer circumference of the circular hole to curl up, thereby ensuring the flatness of the shell surface and avoiding the curled cutting edge of the shell from scratching the staff, which has higher safety; and because the blade does not contact the battery cell during the process of cutting the shell, it is ensured that the battery cell located inside the shell will not be scratched during the process of cutting the shell, thereby ensuring that the test results of the battery are more accurate.

[0037] It is worth noting that the driving member in this embodiment may specifically include a motor, a reducer or other intermediate transmission structure, which is not specifically limited here, as long as the driving member can drive the base plate 1 to rotate automatically.

[0038] Furthermore, if Figure 1 As shown, a receiving groove 11 is provided on the base plate 1, and each blade body is provided on the outer periphery of the receiving groove 11. The receiving groove 11 is recessed inwardly in a direction away from the blade body. The receiving groove 11 is used to accommodate the shell body that is deformed during cutting, that is, the receiving groove 11 is used to accommodate the portion of the shell body that is cut off.

[0039] Specifically, when the blade rotates to cut the shell, the cutting edge of the shell will be deformed, causing the middle position of the cut portion of the shell to bulge toward the direction close to the base 1 during the cutting process. By providing the above-mentioned accommodating groove 11, it is possible to provide an accommodating space for the deformation of the cut portion of the shell. On the one hand, it is possible to reduce the cutting resistance of the shell to the blade, making cutting the circular hole more time-saving and labor-saving. On the other hand, it is possible to avoid interference between the cut bulging portion of the shell and the base 1, thereby ensuring that the bulging portion does not affect the rotation of the base 1.

[0040] Furthermore, the groove depth of the receiving groove 11 matches the deformation of the shell and the cutting depth of the blade, respectively. On the one hand, it ensures that the receiving groove 11 can completely accommodate the bulging part cut off from the lower shell, and avoids the bulging part from squeezing the receiving groove 11 away from the shell due to excessive deformation, thereby ensuring the cutting stability of the shell by the blade; on the other hand, the cutting depth of the blade can be limited by the abutment between the bulging part and the receiving groove 11, so that the blade will not further extend in the direction close to the battery cell for cutting under the abutment between the receiving groove 11 and the bulging part, thereby ensuring that the blade will not contact the battery cell. In this embodiment, the groove depth of the receiving groove 11 can be specifically 0.5mm-3mm; the specific cutting depth of the blade is not limited here, as long as it is ensured that the blade can cut a circular hole in the shell without contacting the battery cell.

[0041] Specifically, in this embodiment, Figure 1 As shown, the blade body may only include a first blade body 2, the cross-sectional shape of the first blade body 2 is a triangle, the bottom end of the first blade body 2 is connected to the base plate 1, the first tip 21 of the first blade body 2 faces the shell, the first tip 21 is arranged parallel to the base plate 1, and the blade is arranged on the first tip 21 so that the blade on the first tip 21 can rotate to cut the shell.

[0042] Furthermore, the distance between the first tip 21 and the base 1 is less than or equal to the thickness of the shell, so as to limit the cutting depth of the blade on the first tip 21, that is, the cutting depth of the blade can be limited while the blade cuts the shell, ensuring that the blade does not contact the battery cell inside the shell during the cutting process, thereby avoiding damage to the battery cell. In this embodiment, the distance between the blade and the base 1 can be specifically 0.5mm-0.6mm.

[0043] like Figure 2 and Figure 3As shown, the blade body may also only include the second blade body 3, the second blade body 3 has a top surface 31 and two side surfaces 32, the two side surfaces 32 are respectively located on opposite sides of the top surface 31, the bottom end of the side surface 32 is connected to the base plate 1, the top end of the side surface 32 is connected to the top surface 31, the two side surfaces 32 gradually approach and are connected to the top surface 31 to form a second tip 33, the second tip 33 is arranged perpendicular to the base plate 1, and the blade is arranged on the second tip 33.

[0044] By forming the above-mentioned second tip 33, the second tip 33 can have a certain thickness, thereby ensuring that the strength of the blade on the second tip 33 is good, ensuring the cutting strength of the blade, avoiding the problem of the second tip 33 being easily bent or even broken during long-term use, and improving the service life of the second tip 33.

[0045] In this embodiment, the angle between the two relative side surfaces 32 is 2°-10°, so that the two side surfaces 32 can quickly approach and connect to the top surface 31 to form a second tip 33, so that the length of the side surfaces 32 and the top surface 31 will not be too long, thereby preventing the entire second blade body 3 from occupying a large area of ​​the base plate 1, so that a larger number of second blade bodies 3 can be arranged on the base plate 1.

[0046] Furthermore, the length of the second tip 33 is less than or equal to the thickness of the shell, so as to limit the cutting depth of the blade on the second tip 33, that is, the cutting depth of the blade can be limited while cutting the shell, ensuring that the blade will not contact the battery cell inside the shell during the cutting process.

[0047] Specifically, if Figure 2 and Figure 3 As shown, the top surface 31 includes a transition surface 312 and a connecting surface 311, one end of the connecting surface 311 is connected to the base plate 1, and the other end of the connecting surface 311 is connected to the transition surface 312, and the transition surface 312 is arranged close to the second tip 33. Relative to the base plate 1, the inclination of the connecting surface 311 is greater than the inclination of the transition surface 312.

[0048] By making the inclination of the connecting surface 311 greater than the inclination of the transition surface 312, on the one hand, the cutting strength of the blade on the second tip 33 can be improved to avoid bending of the second tip 33 and the blade; on the other hand, the inclination of the connecting surface 311 can be made larger to reduce the occupied area of ​​the entire second blade body 3 on the base plate 1, so that a larger number of second blade bodies 3 can be arranged on the base plate 1.

[0049] Specifically, the angle between the connecting surface 311 and the base plate 1 is 4°-12°, and the angle between the transition surface 312 and the base plate 1 is 2°-10°. There is no specific limitation on the above angles, as long as the inclination of the connecting surface 311 is greater than the inclination of the transition surface 312.

[0050] Furthermore, if Figure 1 and Figure 2 As shown, the open shell structure further includes a connecting member 4, the driving member is drivingly connected to one end of the connecting member 4, and the other end of the connecting member 4 is connected to the base plate 1, so that the base plate 1 can be driven to rotate through the connecting member 4. In this embodiment, the connecting member 4 can be specifically a connecting shaft.

[0051] Specifically, the center of the connecting member 4 is aligned with the center of the base plate 1, which is convenient for processing the connecting member 4 and the base plate 1, and is helpful for determining the cutting position of the circular hole. In other embodiments, the center of the connecting member 4 can be misaligned with the center of the base plate 1, that is, the connecting member 4 and the base plate 1 are eccentrically arranged, which is not specifically limited.

[0052] The shell opening structure in this embodiment drives the base plate 1 to rotate through a driving member, so as to drive the various blades on the base plate 1 to rotate and cut the shell at the same time; and by providing a receiving groove 11 in the base plate 1, when opening the shell, the receiving groove 11 can accommodate the bulging part cut off from the shell, and make the bulging part abut against the receiving groove to limit the cutting depth of the blade; while ensuring the automatic cutting of the circular hole in the shell, it can also avoid cutting the battery cell and damaging the battery cell, thereby ensuring the cutting quality of the shell.

[0053] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. Open shell structure, used to open a circular hole on the battery shell, wherein a battery cell is arranged in the shell, characterized in that: include: A base plate (1), wherein a plurality of knife bodies are arranged at intervals on the base plate (1), and the knife bodies are provided with knife edges; A driving member is connected to the base plate (1) for driving the base plate (1) to rotate, so as to drive each of the blades to cut the shell circumferentially to form the circular hole on the shell, and the blades do not contact the battery core.

2. The open shell structure according to claim 1, characterized in that: The base plate (1) is provided with a receiving groove (11), and each of the knife bodies is arranged on the outer periphery of the receiving groove (11). The receiving groove (11) is used to accommodate the shell body that is deformed during cutting.

3. The open shell structure according to claim 2, characterized in that: The groove depth of the accommodating groove (11) matches the deformation amount of the shell and the cutting depth of the blade respectively.

4. The open shell structure according to any one of claims 1 to 3, characterized in that: The blade body comprises a first blade body (2), the cross-sectional shape of the first blade body (2) is triangular, the bottom end of the first blade body (2) is connected to the base plate (1), the first tip (21) of the first blade body (2) faces the shell, and the blade is arranged on the first tip (21).

5. The open shell structure according to claim 4, characterized in that: The distance between the first tip (21) and the base plate (1) is less than or equal to the thickness of the shell.

6. The open shell structure according to any one of claims 1 to 3, characterized in that: The blade body comprises a second blade body (3), the second blade body (3) having a top surface (31) and two side surfaces (32), the two side surfaces (32) being respectively located on opposite sides of the top surface (31), the bottom ends of the side surfaces (32) being connected to the base plate (1), the top ends of the side surfaces (32) being connected to the top surface (31), the two side surfaces (32) gradually approaching and being connected to the top surface (31) to form a second tip (33), and the blade is arranged on the second tip (33).

7. The open shell structure according to claim 6, characterized in that: The length of the second tip (33) is less than or equal to the thickness of the shell.

8. The open shell structure according to claim 6, characterized in that: The top surface (31) comprises a transition surface (312) and a connection surface (311), one end of the connection surface (311) is connected to the base plate (1), and the other end of the connection surface (311) is connected to the transition surface (312), the transition surface (312) is arranged close to the second tip (33), and relative to the base plate (1), the inclination of the connection surface (311) is greater than the inclination of the transition surface (312).

9. The open shell structure according to claim 8, characterized in that: The angle between the connecting surface (311) and the base plate (1) is 4°-12°, and the angle between the transition surface (312) and the base plate (1) is 2°-10°.

10. The open shell structure according to any one of claims 1 to 3, characterized in that: The open shell structure also includes: A connecting member (4), wherein the driving member is drivingly connected to one end of the connecting member (4), the other end of the connecting member (4) is connected to the base plate (1), and the center of the connecting member (4) is aligned with the center of the base plate (1).

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