Dual-purpose tool for needling and extruding test of cylindrical battery

Abstract

The utility model discloses a dual-purpose tool for needling and squeezing testing of a cylindrical battery, which belongs to the field of battery safety testing and comprises a positioning plate, a positioning base and an upper cover which are sequentially connected from bottom to top, a U-shaped groove is arranged at the top of the positioning base, and the positioning plate and the positioning base are in lockable sliding connection. The sliding direction is parallel to the axis direction of the U-shaped groove, the upper cover strides over the U-shaped groove and is provided with an upper cover needle hole aligned with the U-shaped groove, and the length of the upper cover is smaller than that of the U-shaped groove. The tool can reliably fix the cylindrical battery, prevent the battery from sliding in the needling and extrusion testing process, avoid needle breaking in the needling testing process and avoid extrusion testing position deviation, not only ensures the accuracy of the needling and extrusion testing result and the safety of the testing process, but also can improve the battery testing efficiency, and is suitable for popularization and application. And a more reliable technical support is provided for safety performance evaluation of the new energy automobile and the electronic equipment.

Description

Technical Field

[0001] The utility model relates to a dual-purpose tool for needle puncture and extrusion testing of cylindrical batteries, belonging to the field of battery safety testing. Background Art

[0002] Against the backdrop of the rapid development of the new energy industry, the safety and stability of cylindrical batteries, as core energy components in new energy vehicles and portable electronic devices, have become a focus of industry attention. Penetration testing and extrusion testing are two key test methods for evaluating battery safety performance. They can simulate the reaction of batteries when punctured by sharp objects or squeezed by external forces. However, in existing technologies, cylindrical batteries have the following problems when undergoing puncture and extrusion tests:

[0003] 1. Difficulty in Fixing: Existing needle penetration test equipment has many inconveniences when fixing cylindrical batteries. Due to the geometric characteristics of cylindrical batteries, the force generated by the steel needle puncturing and squeezing may cause the battery to slip, making it difficult to achieve stable fixation during testing. This greatly affects the accuracy of the test results.

[0004] 2. Needle breakage during needle penetration testing: Due to the geometric characteristics of cylindrical batteries during testing, the steel needle may deviate from its intended trajectory and strike the tooling, causing it to bend or break. This not only causes test failure and increases testing costs, but can also easily lead to safety accidents. Utility Model Content

[0005] In order to overcome the deficiencies of the prior art, the utility model provides a dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries, which is easy to fix the cylindrical battery during needle penetration testing and extrusion testing, and facilitates needle insertion during needle penetration testing.

[0006] The technical solution adopted by the utility model to solve its technical problems is:

[0007] A dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries, comprising a positioning plate, a positioning base and an upper cover connected in sequence from bottom to top, wherein a U-shaped groove is provided on the top of the positioning base, and the connection between the positioning plate and the positioning base is a lockable sliding connection, wherein the sliding direction is parallel to the axial direction of the U-shaped groove, the upper cover spans the U-shaped groove and is provided with an upper cover needle penetration hole aligned with the U-shaped groove, and the length of the upper cover is less than the length of the U-shaped groove.

[0008] The dual-purpose tooling for puncture and extrusion testing of cylindrical batteries provided in the present application uses a U-shaped groove to support a lying cylindrical battery, and uses the cooperation of the positioning base and the upper cover to limit the cylindrical battery to prevent the cylindrical battery from rolling during the test. The puncture test can be performed by inserting a needle into the puncture hole of the upper cover. The puncture hole of the upper cover can guide the steel needle to pass through to prevent the steel needle from slipping on the curved surface of the cylindrical battery. The extrusion test can be performed by squeezing the part of the cylindrical battery not covered by the upper cover into the U-shaped groove. The position of the positioning base on the positioning plate is adjusted by sliding to facilitate the alignment of the steel needle with the cylindrical battery.

[0009] Furthermore, a positioning piece is provided on the positioning plate, and a positioning track that cooperates with the positioning piece is provided at the bottom of the positioning base, and the positioning track is parallel to the axial direction of the U-shaped groove.

[0010] Furthermore, a bolt hole is provided on the top surface of the positioning plate, the positioning track is a T-slot, the positioning piece is a big-head bolt inserted into the bolt hole, and the bolt head of the big-head bolt is stuck in the T-slot.

[0011] Furthermore, a supporting base plate is provided under the positioning plate, and the positioning plate and the supporting base plate are connected by supporting columns.

[0012] Furthermore, the bolt hole is provided with an internal thread, and the top of the positioning base is provided with an avoidance groove penetrating downward to the T-slot.

[0013] Furthermore, there are two parallel T-slots, and two rows of bolt holes are correspondingly provided on the top surface of the positioning plate.

[0014] Furthermore, the upper cover includes an upwardly curved protrusion and fixed wings located on both sides of the protrusion, the protrusion spans the U-shaped groove, the upper cover acupuncture hole is located at the highest point of the protrusion, a cover plate positioning hole is provided on the fixed wing, and a base screw hole aligned with the cover plate positioning hole is provided on the top of the positioning base.

[0015] Furthermore, the positioning base is provided with a supporting base at one end of the U-shaped groove; viewed along the axial direction of the U-shaped groove, the range enclosed by the U-shaped groove and the upper cover at least partially overlaps with the projection of the supporting base.

[0016] Furthermore, the supporting base is a circular ring, and the axis of the circular ring coincides with the axis of the U-shaped groove.

[0017] Furthermore, the positioning base is provided with a pad groove connected to the U-shaped groove below the U-shaped groove; when viewed from above, the projection of the puncture hole of the upper cover falls within the range of the pad groove, and the pad groove exceeds the range covered by the upper cover; a detachable pad is provided in the pad groove.

[0018] The beneficial effects of the present invention are as follows: the dual-purpose tooling for needle penetration and extrusion testing of cylindrical batteries of the present invention can reliably fix the cylindrical batteries, prevent the batteries from sliding during the needle penetration and extrusion tests, avoid needle breakage during the needle penetration test, and avoid position deviation during the extrusion test. It not only ensures the accuracy of the needle penetration and extrusion test results and the safety of the test process, but also improves the efficiency of battery testing, and provides more reliable technical support for the safety performance evaluation of new energy vehicles and electronic equipment.

[0019] Other features and advantages of the present application will be described in the following description, and in part will become apparent from the description, or understood by practicing the present application. The purpose and other advantages of the present application can be realized and obtained by the structures particularly pointed out in the written description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries provided in an embodiment of the present application.

[0021] Figure 2 It is a schematic diagram of the connection relationship between the positioning piece and the positioning track.

[0022] Figure 3 This is a structural diagram of a positioning plate provided in an embodiment of the present application.

[0023] Figure 4 This is a structural diagram of a positioning base provided in an embodiment of the present application.

[0024] Figure 5 This is a schematic structural diagram of an upper cover provided in an embodiment of the present application.

[0025] Figure 6 It is a schematic diagram of the positional relationship between the pad and the pad groove.

[0026] Figure numerals: 1. Positioning plate; 2. Positioning base; 3. Cylindrical battery; 4. Pad; 5. Positioning piece; 6. Upper cover; 7. Upper cover fixing bolt; 8. Bolt hole; 9. Support column; 10. Support base plate; 11. Needle hole in upper cover; 12. Cover positioning hole; 13. Positioning rail; 14. Base screw hole; 15. Pad groove; 16. U-shaped groove; 17. Support base; 18. Lifting handle; 21. Avoidance groove. DETAILED DESCRIPTION

[0027] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be understood as limiting the present invention.

[0028] The following disclosure provides many different embodiments or examples for implementing different structures of the present invention. To simplify the disclosure of the present invention, the components and configurations of specific examples are described below. Of course, these are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or reference letters in different examples. Such repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or configurations discussed.

[0029] Reference Figure 1 and Figure 2 The embodiment of the present application provides a dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries, including a positioning plate 1, a positioning base 2 and an upper cover 6 connected in sequence from bottom to top, a U-shaped groove 16 is provided on the top of the positioning base 2, and the connection relationship between the positioning plate 1 and the positioning base 2 is a lockable sliding connection, and the sliding direction is parallel to the axial direction of the U-shaped groove 16. The upper cover 6 spans the U-shaped groove 16 and is provided with an upper cover needle hole 11 aligned with the U-shaped groove 16. The length of the upper cover 6 is less than the length of the U-shaped groove 16.

[0030] The U-shaped groove 16 can be a semi-cylindrical depression that can adapt to the curved surface of the cylindrical battery 3. The axis of the U-shaped groove 16 is the geometric rotation axis of the semi-cylindrical depression. The length direction of the upper cover is the direction parallel to the axis direction of the U-shaped groove 16 on the horizontal plane. The length of the upper cover 6 is less than the length of the U-shaped groove 16, which means that when viewed from a top view, the upper cover 6 cannot completely cover the U-shaped groove.

[0031] During use, the U-shaped groove 16 is used to support the horizontal cylindrical battery 3. The cooperation between the positioning base 2 and the upper cover 6 can limit the cylindrical battery 3 to prevent the cylindrical battery 3 from rolling during testing. The extrusion test can be performed by squeezing the part of the cylindrical battery 3 not covered by the upper cover 6 vertically downward into the U-shaped groove 16. The puncture test can be performed by inserting a needle into the puncture hole 11 of the upper cover. The puncture hole 11 of the upper cover can guide the steel needle through to prevent the steel needle from slipping on the curved surface of the cylindrical battery 3. The position of the positioning base 2 on the positioning plate 1 is adjusted to facilitate the alignment of the steel needle with the cylindrical battery 3.

[0032] The connection form between the positioning plate 1 and the positioning base 2 can be: a positioning member 5 is provided on the positioning plate 1, and a positioning track 13 cooperating with the positioning member 5 is provided at the bottom of the positioning base 2, and the positioning track 13 is parallel to the axial direction of the U-shaped groove 16.

[0033] Specifically, the top surface of the positioning plate 1 is provided with a bolt hole 8, the positioning track 13 is a T-slot, and the positioning member 5 is a large head bolt that is inserted into the bolt hole 8, and the bolt head of the large head bolt is stuck in the T-slot. When the position of the positioning base 2 needs to be adjusted, the large head bolt is loosened, and after it is adjusted into place, the large head bolt is tightened.

[0034] In some embodiments, a support base plate 10 is provided below the positioning plate 1, and the positioning plate 1 and the support base plate 10 are connected by support columns 9. This structure not only elevates the positioning plate 1, but also allows tools (such as a wrench for removing the nut or a flexible shaft for a hand drill) to extend directly from the support columns 9 to the bottom of the positioning plate 1 if nuts and thumb bolts are used at the bottom of the positioning plate 1.

[0035] In the previous embodiment, installing the nut from below is rather cumbersome. In a preferred embodiment, the bolt hole 8 is provided with an internal thread, and a relief groove 21 extending downwardly from the top of the positioning base 2 to the T-slot is provided. The relief groove 21 is strip-shaped, so that a thumb bolt can be directly inserted into the relief groove 21 from the top of the positioning base 2, passed through the T-slot, and then connected to the internally threaded bolt hole 8.

[0036] In some embodiments, there is only one T-slot, and at least two thumb bolts are required to secure the T-slot. Figure 2 and Figure 3 There are two parallel T-slots, and two rows of bolt holes 8 are correspondingly provided on the top surface of the positioning plate 1, which can provide a more stable locking effect.

[0037] Reference Figure 5 The upper cover 6 includes an upwardly curved protrusion and fixed wings located on both sides of the protrusion, similar to an "Ω" shape. The protrusion crosses the U-shaped groove 16, and the upper cover needle hole 11 is located at the highest point of the protrusion. The fixed wings are provided with a cover plate positioning hole 12, and the top of the positioning base 2 is provided with a base screw hole 14 aligned with the cover plate positioning hole 12. The curvature of the protrusion can be the same as the radius of the U-shaped groove 16. When viewed along the axis of the U-shaped groove 16, the protrusion and the U-shaped groove 16 enclose a circle. Figure 2 and Figure 6 , use the upper cover fixing bolt 7 to pass through the cover plate positioning hole 12 and then connect with the base screw hole 14 to fix the upper cover 6 on the positioning base 2. Preferably, the cover plate positioning hole 12 is a strip shape, which can adjust the puncture point of the cylindrical battery at different heights.

[0038] Reference Figure 2 、 Figure 4 and Figure 6The positioning base 2 is provided with a support base 17 at one end of the U-shaped groove 16; viewed along the axial direction of the U-shaped groove 16, the range enclosed by the U-shaped groove 16 and the upper cover 6 at least partially overlaps with the projection of the support base 17. The support base 17 is used to limit the movement of the cylindrical battery 3 along the axial direction of the U-shaped groove 16 (one-way). Since this limiting effect is one-way and the battery usually explodes during the needle penetration test or the extrusion test, it is not an ideal embodiment for the support base 17 to completely block one end of the U-shaped groove 16 (the range enclosed by the U-shaped groove 16 and the upper cover 6 completely overlaps with the projection of the support base 17 when viewed along the axial direction of the U-shaped groove 16).

[0039] In a preferred embodiment, the support base 17 is a ring, and the axis of the ring coincides with the axis of the U-shaped groove 16. The ring shape facilitates longitudinal pressure relief of the cylindrical battery 3 during a needle puncture or extrusion test.

[0040] Reference Figure 6 The positioning base 2 is provided with a pad groove 15 connected to the U-shaped groove 16 below the U-shaped groove 16; when viewed from above, the projection of the needle hole 11 of the upper cover falls within the range of the pad groove 15, and the pad groove 15 exceeds the range covered by the upper cover 6; a detachable pad 4 is provided in the pad groove 15.

[0041] The pad groove 15 is used to pass the needle during the needle penetration test, ensuring that the needle completely penetrates the cylindrical battery 3. The pad groove 15 is also used to place the pad 4 during the extrusion process. Preferably, the pad groove 15 and the support base 17 are each located at one end of the U-shaped groove 16. The pad 4 is provided with a lifting handle 18 to facilitate the removal of the pad 4. The top surface of the pad 4 can be configured as a downwardly concave arc to complement the pad groove 15 and connect with the U-shaped groove 16 to form a continuous arc.

[0042] This dual-purpose tool for puncture and extrusion testing of cylindrical batteries can be used for both puncture and extrusion testing by disassembling and combining different modules. The simple structure and easy disassembly and assembly fully meet the fixing conditions of puncture and extrusion for cylindrical batteries, thereby improving the accuracy of puncture and extrusion test results and the safety of the test process.

[0043] Throughout this specification, references to terms such as "one embodiment," "certain embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" indicate that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative uses of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0044] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries, characterized in that: The invention comprises a positioning plate (1), a positioning base (2) and an upper cover (6) connected in sequence from bottom to top, wherein a U-shaped groove (16) is provided on the top of the positioning base (2), the connection relationship between the positioning plate (1) and the positioning base (2) is a lockable sliding connection, and the sliding direction is parallel to the axial direction of the U-shaped groove (16), the upper cover (6) straddles the U-shaped groove (16) and is provided with an upper cover needle hole (11) aligned with the U-shaped groove (16), and the length of the upper cover (6) is less than the length of the U-shaped groove (16).

2. The dual-purpose tool for cylindrical battery puncture and extrusion testing according to claim 1, characterized in that: A positioning member (5) is provided on the positioning plate (1), and a positioning track (13) cooperating with the positioning member (5) is provided at the bottom of the positioning base (2), wherein the positioning track (13) is parallel to the axial direction of the U-shaped groove (16).

3. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 2, characterized in that: The top surface of the positioning plate (1) is provided with a bolt hole (8), the positioning rail (13) is a T-slot, the positioning member (5) is a large-head bolt inserted into the bolt hole (8), and the bolt head of the large-head bolt is stuck in the T-slot.

4. The dual-purpose tool for needle puncture and extrusion testing of cylindrical batteries according to claim 1 or 3, characterized in that: A supporting base plate (10) is further provided under the positioning plate (1), and the positioning plate (1) and the supporting base plate (10) are connected by providing a supporting column (9).

5. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 3, characterized in that: The bolt hole (8) is provided with an internal thread, and the top of the positioning base (2) is provided with an avoidance groove (21) extending downwardly through the T-slot.

6. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 3, characterized in that: The T-shaped slots are provided with two parallel rows, and the top surface of the positioning plate (1) is provided with two rows of bolt holes (8) correspondingly.

7. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 1, characterized in that: The upper cover (6) comprises an upwardly curved raised portion and fixed wings located on both sides of the raised portion, the raised portion spans the U-shaped groove (16), the upper cover needle hole (11) is located at the highest point of the raised portion, a cover plate positioning hole (12) is provided on the fixed wings, and a base screw hole (14) aligned with the cover plate positioning hole (12) is provided on the top of the positioning base (2).

8. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 1, characterized in that: The positioning base (2) is provided with a supporting base (17) at one end of the U-shaped groove (16); viewed along the axial direction of the U-shaped groove (16), the range enclosed by the U-shaped groove (16) and the upper cover (6) at least partially overlaps with the projection of the supporting base (17).

9. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 8, characterized in that: The supporting base (17) is a circular ring, and the axis of the circular ring coincides with the axis of the U-shaped groove (16).

10. The dual-purpose tool for needle penetration and extrusion testing of cylindrical batteries according to claim 1, characterized in that: The positioning base (2) is provided with a pad groove (15) below the U-shaped groove (16) and in communication with the U-shaped groove (16); when viewed from above, the projection of the needle hole (11) of the upper cover falls within the range of the pad groove (15), and the pad groove (15) exceeds the range covered by the upper cover (6); a detachable pad (4) is provided in the pad groove (15).

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