Needling structure and needling device

Abstract

The utility model provides a needling structure and a needling device, the needling structure comprises a mounting piece and a needling piece, the mounting piece is configured to be mounted in needling equipment, and the needling piece is detachably mounted at one end of the mounting piece in a first direction; wherein the pricking needle piece extends in the first direction, and one end of the pricking needle piece is configured to puncture the battery; according to the technical scheme, the needling structure comprises the needling piece and the installation piece which are detachably connected, after one-time needling testing is carried out, the used needling piece can be detached from the installation piece, and a new needling piece is installed on the installation piece, so that the part needing to be replaced in the needling structure only comprises the needling piece; and the pricking needle piece is not replaced, so that the resource waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to battery experiment technical field, concretely relates to a needle pricking structure and needle pricking device. BACKGROUND

[0002] In the related art, the needle pricking test can simulate the situation of the battery being punctured by a sharp object, so as to evaluate the safety performance of the battery. In the current needle pricking test, the battery is punctured by a steel needle with a proper diameter, which can accurately simulate the puncture situation of the sharp object that the battery may encounter in actual use. However, in the needle pricking test, each steel needle is scrapped after a test experiment, which causes resource waste. SUMMARY

[0003] The embodiments of the utility model provide a needle pricking structure and a needle pricking device, which can solve the technical problem of resource waste caused by the scrapping of the steel needle after a test experiment in the related art.

[0004] In a first aspect, the embodiments of the utility model provide a needle pricking structure, which comprises:

[0005] a mounting member configured to be mounted in a needle pricking device; and

[0006] a needle member detachably mounted at one end of the mounting member in the first direction.

[0007] The needle member extends along the first direction, and one end of the needle member is configured to puncture a battery.

[0008] In an embodiment, the needle member comprises a needle body and a connecting portion, the needle body extends along the first direction, the connecting portion is connected to one end of the needle body, and the connecting portion is detachably mounted in the mounting member.

[0009] In an embodiment, the mounting member comprises two opposite ends in the first direction, and at least one of the two ends of the mounting member is provided with a mounting groove.

[0010] The connecting portion is detachably mounted in the mounting groove.

[0011] In an embodiment, the mounting groove has a plurality of mounting positions arranged along the first direction.

[0012] The connecting portion can be assembled to any mounting position.

[0013] In an embodiment, the connecting portion is screwed or clamped in the mounting groove.

[0014] In an embodiment, the mounting groove comprises a groove bottom and an opening oppositely arranged in the first direction;

[0015] In the first direction, a dimension of the connecting portion from a side of the groove bottom of the mounting groove close to the opening of the mounting groove is L1; wherein the L1 satisfies: 10mm≤L1≤90mm

[0016] In an embodiment, a dimension of the needle body in the first direction is L2; wherein the L2 satisfies: 20mm≤L2≤100mm.

[0017] In an embodiment, the needle body comprises a body portion extending along the first direction and connected with the connecting portion;

[0018] A dimension of the body portion in a second direction intersecting with the first direction is L3; wherein the L3 satisfies: 0mm<L3≤8mm.

[0019] In an embodiment, the needle body further comprises a needle tip portion arranged at an end of the body portion away from the connecting portion, the needle tip portion having a tip end and a connecting end;

[0020] In a cross section formed by the first direction and the second direction, the needle tip portion further comprises a first edge and a second edge connecting the tip end and the connecting end, one end of the first edge and the second edge intersecting to form an included angle of α; wherein the α satisfies: 45°≤α≤60°.

[0021] In an embodiment, a dimension of the mounting member in the first direction is L4; wherein the L4 satisfies: 200mm≤L4≤270mm.

[0022] In a second aspect, embodiments of the utility model provide a needling device comprising a needling structure.

[0023] The embodiments of the utility model have the advantages of:

[0024] In the technical scheme of the application, by arranging the needling structure comprising detachably connected needle member and mounting member, after one-time needling test, the used needle member can be detached from the mounting member, and a new needle member can be installed on the mounting member, so that the part to be replaced in the needling structure only includes the needle member, and the needle member is not replaced, thereby reducing resource waste. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed in the embodiment description. Obviously, the drawings described in the following are only some of the embodiments of the present application, and all other drawings obtained by those skilled in the art without creative effort based on these drawings also belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the positional words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing in the drawing; and "inner" and "outer" are relative to the outline of the device.

[0026] Figure 1 is a structure diagram of a needling structure provided by the embodiment of the present application;

[0027] Figure 2 is a sectional view diagram of the needling structure provided by the embodiment of the present application;

[0028] Figure 3 is a structure diagram of a mounting member provided by the embodiment of the present application;

[0029] Figure 4 is a structure diagram of a needle member provided by the embodiment of the present application;

[0030] Figure 5 is a structure diagram of a needle member provided by the embodiment of the present application;

[0031] Figure 6 is a structure diagram of a needle member provided by the embodiment of the present application.

[0032] Explanation of reference signs:

[0033] 1000, needling structure; 1, mounting member; 2, needle member; 21, needle body; 211, body part; 212, needle tip part; 22, connecting part; 3, mounting groove; 31, groove bottom; 32, opening; 4, tip; 5, connecting end; 6, first edge; 7, second edge. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be described clearly and completely in the following by combining with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative effort belong to the protection scope of the present application. In addition, it should be understood that the specific embodiments described herein are only used to illustrate and explain the present application, and are not used to limit the present application. In the present application, the positional words such as "upper" and "lower" generally refer to the upper and lower of the device in the actual use or working state, and the specific is the direction of the drawing in the drawing; and "inner" and "outer" are relative to the outline of the device.

[0035] The application provides a needle structure, Figures 1 to 6 For some embodiments of the application. As shown in the drawings, the X direction is the first direction, and the Y direction is the second direction. Hereinafter, the first direction X and the second direction Y are described. The first direction X intersects the second direction Y.

[0036] Please refer to Figures 1 to 2 In some embodiments of the application, the needle structure 1000 comprises a mounting member 1 configured to be mounted in a needle device; wherein the mounting member 1 is mounted in the needle device in a manner not limited to screwing, clamping, etc.

[0037] In some embodiments of the application, the needle structure 1000 further comprises a needle member 2 detachably mounted at one end of the mounting member 1 in the first direction X, and one end of the needle member 2 is configured to puncture a battery.

[0038] The needle member 2 and the mounting member 1 together form the needle structure 1000. The needle structure 1000 in the application has the same function as the steel needle in the related art. The detachable connection of the needle member 2 and the mounting member 1 allows the needle member 2 to be detached from the mounting member 1 after a needle test, so that a new needle member 2 can be installed. That is, when different needle tests are performed, only the needle member 2 in the needle structure 1000 needs to be replaced.

[0039] In the technical solution of the application, by providing the needle structure 1000 comprising the detachably connected needle member 2 and mounting member 1, after a needle test, the used needle member 2 can be detached from the mounting member 1, and a new needle member 2 can be installed on the mounting member 1, so that the components that need to be replaced in the needle structure 1000 only include the needle member 2, and the needle member 2 does not need to be replaced, thereby reducing resource waste.

[0040] In addition, since the needle member 2 in the needle structure 1000 is replaceable, in some embodiments of the application, different sizes of needle members 2 can be selected to be installed on the mounting member 1, so that the needle structure 1000 can select different sizes of needle members 2 to be installed on the mounting member 1 according to different test standards of the needle test, thereby improving the versatility of the needle structure 1000.

[0041] It should be noted that, since the needle structure 1000 in the embodiments of the application has the same function as the steel needle in the related art, the steel needle in the related art needs to be replaced completely after being used once, while the needle structure 1000 in the embodiments of the application only needs to replace part of the components, i.e. the needle member 2, thereby reducing resource waste.

[0042] In some embodiments of the present application, the needle member 2 comprises a needle body 21 extending along the first direction X and a connecting portion 22 connected to one end of the needle body 21, the connecting portion 22 being detachably mounted on the mounting member 1; wherein the needle body 21 is configured to puncture the battery, and the needle body 21 is connected to the mounting member 1 through the connecting portion 22, and since the needle body 21 is not directly connected to the mounting member 1, when different sizes of the needle body 21 are selected, the different sizes of the needle body 21 can be connected to the mounting member 1 through the connecting portion 22, that is, the structure of the connecting portion 22 and the mounting member 1 can be designed to be fixed size, so as to facilitate the processing and production of the needle structure 1000.

[0043] Please refer to Figures 2 to 3 In some embodiments of the present application, the mounting member 1 comprises opposite two ends in the first direction X, and at least one of the opposite two ends of the mounting member 1 in the first direction X is provided with a mounting groove 3; the connecting portion 22 is detachably mounted in the mounting groove 3. That is, in this embodiment, by setting the connecting portion 22 to be detachably mounted in the mounting groove 3, the needle member 2 can be detached from the mounting groove 3 on the mounting member 1 after one-time needle puncture test, so as to replace a new needle member 2 and reduce resource waste.

[0044] In some embodiments of the present application, the mounting member 1 is provided with the mounting groove 3 at both ends in the first direction X; in this way, when one of the mounting grooves 3 in the mounting member 1 is damaged, the other mounting groove 3 in the mounting member 1 can be used, thereby improving the utilization rate of the mounting member 1.

[0045] The form of detachable mounting of the needle member 2 in the mounting groove 3 is not limited. Please refer to Figure 2 In an embodiment of the present application, the connecting portion 22 is screwed in the mounting groove 3; since the needle body 21 punctures the battery in the first direction X, the force direction of the needle body 21 when the needle structure 1000 abuts against the battery is also the first direction X, and under the action of mutual screwing of the connecting portion 22 and the mounting member 1, the connecting portion 22 and the mounting member 1 will not move relative to each other in the first direction X.

[0046] Wherein, the form of screwing the connecting portion 22 in the mounting groove 3 is not limited; in an embodiment, an external thread can be provided on the connecting portion 22, an internal thread is provided on the groove wall of the mounting groove 3, and the internal thread and the external thread are matched with each other to realize the connection between the connecting portion 22 and the mounting member 1; in another embodiment, a groove can be provided on the connecting portion 22, an internal thread is provided in the groove of the connecting portion 22, a convex portion is mounted on the groove wall of the mounting groove 3, and an external thread is provided on the convex portion, and the internal thread in the groove of the connecting portion 22 and the external thread on the convex portion are matched with each other to realize the connection between the connecting portion 22 and the mounting member 1.

[0047] In another embodiment of the present application, the connecting portion 22 is clamped in the mounting groove 3, that is, under the clamping action of the connecting portion 22 and the mounting member 1, the relative movement between the connecting portion 22 and the mounting member 1 in the first direction X is limited.

[0048] In the present application, the form of the clamping of the connecting portion 22 in the mounting groove 3 is not limited; in an embodiment of the present application, the needle structure 1000 further comprises a buckling portion and a cooperating portion, one of which is connected with the connecting portion 22, and the other is arranged in the mounting groove 3, the buckling portion and the cooperating portion are matched with each other to fix the connecting portion 22 and the mounting member 1; in this way, through the mutual cooperation of the buckling portion and the cooperating portion, the relative movement of the connecting portion 22 and the mounting member 1 in the first direction X is limited.

[0049] In the present application, one of the buckling portion and the cooperating portion can be a clamping protrusion, and the other can be a clamping slot, that is, a plurality of clamping slots arranged along the first direction X are arranged on the groove wall of the mounting groove 3, and a protrusion is arranged on the outer periphery of the connecting portion 22, and the relative fixation of the connecting portion 22 and the mounting member 1 is realized through the cooperation of the clamping slot and the protrusion.

[0050] In addition, since the connecting portion 22 is located in the mounting groove 3, the groove wall part of the mounting member 1 constituting the mounting groove 3 also limits the movement of the connecting portion 22 along the second direction Y.

[0051] In some embodiments of the present application, the mounting groove 3 has a plurality of mounting positions arranged along the first direction; wherein the connecting portion 22 can be assembled into any mounting position; in this embodiment, in this way, the positional relationship of the needle member 2 relative to the mounting member 1 in the first direction X can be adjusted, so that the length of the needle body 21 of the needle member 2 extending from the mounting member 1 can be adjusted according to different experimental standards of needle test.

[0052] It can be understood that since the connecting portion 22 is assembled into the mounting groove 3, in some embodiments, part of the needle body 21 can enter the mounting groove 3 along with the movement of the connecting portion 22.

[0053] In some embodiments of the present application, the plurality of mounting positions in the mounting groove 3 are arranged equidistantly in the first direction X; so as to improve the accuracy of the positional adjustment of the needle member 2 relative to the mounting member 1 in the first direction X.

[0054] Please refer to Figure 2In some embodiments of the present application, the mounting groove 3 comprises a groove bottom 31 and an opening 32 opposite to each other in the first direction X; in the first direction X, the size of the side of the connecting portion 22 close to the groove bottom 31 of the mounting groove 3 to the opening 32 of the mounting groove 3 is L1; wherein L1 satisfies: 10mm≤L1≤90mm. Designing L1 to satisfy this interval range makes the connecting portion 22 fixed firmly in the mounting groove 3, while the overall length of the needle structure 1000 in the first direction X can be adjusted according to actual needs. If L1 is less than 10mm, there is a risk that the connecting portion 22 cannot be fixed firmly in the mounting groove 3; if L1 is greater than 90mm, the depth of the connecting portion 22 in the first direction X into the mounting groove 3 is too large, which is not convenient for assembly and can cause the needle body 21 to enter too much into the mounting groove 3, so that the part of the needle body 21 outside the mounting groove 3 cannot meet the experimental standard of the needle test.

[0055] Wherein, the value of L1 can be 10mm, 12mm, 14mm, 16mm, 18mm, 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38mm, 40mm, 42mm, 44mm, 46mm, 48mm, 50mm, 52mm, 54mm, 56mm, 58mm, 60mm, 62mm, 64mm, 66mm, 68mm, 70mm, 72mm, 74mm, 76mm, 78mm, 80mm, 82mm, 84mm, 86mm, 88mm, 90mm. The value of L1 is not limited to the listed values, and other values not listed in this range are also applicable.

[0056] Please refer to Figures 4 to 6 In some embodiments of the present application, the size of the needle body 21 in the first direction X is L2; wherein L2 satisfies: 20mm≤L2≤100mm; such design makes the size of the needle body 21 in the first direction X meet the needs of the experimental standard of the needle test in the related art; if L2 is less than 20mm, the size of the needle body 21 in the first direction X cannot meet the experimental standard of the needle test in the related art; if L2 is greater than 100mm, the length of the needle body 21 is too long, which can cause resource waste.

[0057] The value of L2 can be 20 mm, 22 mm, 24 mm, 26 mm, 28 mm, 30 mm, 32 mm, 34 mm, 36 mm, 38 mm, 40 mm, 42 mm, 44 mm, 46 mm, 48 mm, 50 mm, 52 mm, 54 mm, 56 mm, 58 mm, 60 mm, 62 mm, 64 mm, 66 mm, 68 mm, 70 mm, 72 mm, 74 mm, 76 mm, 78 mm, 80 mm, 82 mm, 84 mm, 86 mm, 88 mm, 90 mm, 92 mm, 94 mm, 96 mm, 98 mm, 100 mm. The value of L2 is not limited to the listed values, and other values in the range also apply.

[0058] Please refer to Figure 4 In some embodiments of the present application, the needle body 21 comprises a body part 211 extending along the first direction X, and one end of the body part 211 in the first direction X is detachably mounted on the mounting member 1; the size of the body part 211 in the second direction Y is defined as L3; wherein L3 satisfies: 0mm < L3≤8mm; L3 is designed to satisfy the test standard of the needle test of the battery in the second direction Y. The shape of the needle body is not limited, and the body part 211 can be prismatic, cylindrical, etc.

[0059] In some embodiments of the present application, the body part 211 is cylindrical, i.e. the diameter of the body part 211 satisfies the interval range of 0mm to 8mm, which can make the size of the body part satisfy the test standard of the needle test of the battery.

[0060] If L3 is greater than 8mm, the size of the body part 211 in the second direction Y cannot satisfy the test standard of the needle test.

[0061] The value of L3 can be 0.2mm, 0.4mm, 0.6mm, 0.8mm, 1.0mm, 1.2mm, 1.4mm, 1.6mm, 1.8mm, 2.0mm, 2.2mm, 2.4mm, 2.6mm, 2.8mm, 3.0mm, 3.2mm, 3.4mm, 3.6mm, 3.8mm, 4.0mm, 4.2mm, 4.4mm, 4.6mm, 4.8mm, 5.0mm, 5.2mm, 5.4mm, 5.6mm, 5.8mm, 6.0mm, 6.2mm, 6.4mm, 6.6mm, 6.8mm, 7.0mm, 7.2mm, 7.4mm, 7.6mm, 7.8mm, 8.0mm. The value of L3 is not limited to the listed values, and other values in the range also apply.

[0062] In some embodiments of the present application, the needle body 21 further comprises a needle tip portion 212, which is arranged at one end of the body portion 211 away from the connecting portion 22, and has a tip end 4 and a connecting end 5; in the cross section formed by the first direction X and the second direction Y, the needle tip portion 212 further comprises a first edge 6 and a second edge 7 connecting the tip end 4 and the connecting end 5, and the angle of the included angle formed by the one end of the first edge 6 and the second edge 7 is α; wherein α satisfies: 45°≤α≤60°; in this way, the included angle α of the needle tip portion 212 satisfies the test standard of the battery needle puncture test. If α is less than 45° or greater than 60°, the included angle of the needle tip portion 212 cannot satisfy the test standard of the battery needle puncture test.

[0063] The value of α can be 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, or 60°. The value of α is not limited to the listed values, and other values within the range are also applicable.

[0064] Please refer to Figure 3 In some embodiments of the present application, the size of the mounting member 1 in the first direction X is defined as L4; wherein L4 satisfies: 200mm≤L4≤270mm. In this way, the size of the part of the needle puncture structure 1000 that does not need to be replaced is larger, so as to reduce resource waste.

[0065] In addition, since the mounting member 1 needs to be provided with mounting grooves 3 at both ends in the first direction X, and the size L1 from the side of the groove bottom 31 of the mounting groove 3 close to the connecting portion 22 to the opening 32 of the mounting groove 3 is within the range of 10mm to 90mm, if L4 is less than 200mm, it may not be possible to provide two mounting grooves 3 on the mounting member 1; if L4 is greater than 270mm, the length of the mounting member 1 in the first direction X is too long, which may cause resource waste, and the mounting member 1 needs to be installed in the needle puncture device, so the too long mounting member 1 may also have the defect of being difficult to install.

[0066] The value of L4 can be 200 mm, 202 mm, 204 mm, 206 mm, 208 mm, 210 mm, 212 mm, 214 mm, 216 mm, 218 mm, 220 mm, 222 mm, 224 mm, 226 mm, 228 mm, 230 mm, 232 mm, 234 mm, 236 mm, 238 mm, 240 mm, 242 mm, 244 mm, 246 mm, 248 mm, 250 mm, 252 mm, 254 mm, 256 mm, 258 mm, 260 mm, 262 mm, 264 mm, 266 mm, 268 mm, 270 mm. The value of L4 is not limited to the listed values, and other values in the range are also applicable.

[0067] Referring to Figures 4 to 6 In some embodiments of the present application, the same size of the connecting portion 22 can be connected with different sizes of the body portion 211, so that the needle structure 1000 can be installed on the mounting member 1 according to different test standards of the needle test, and the versatility of the needle structure 1000 is improved.

[0068] In some embodiments of the present application, the needle body 21 further comprises a needle tip portion 212, which is arranged at the other end of the body portion 211 in the first direction X. The needle tip portion 212 has an included angle in the cross section of the plane in the first direction X and the second direction Y, and the included angle is located at the end of the needle tip portion 212 away from the body portion 211 in the first direction X. The angle of the included angle is defined as α. Wherein, α satisfies: 45°≤α≤60°. In this way, the included angle α of the needle tip portion 212 satisfies the test standard of the battery needle test. If α is less than 45° or greater than 60°, the included angle of the needle tip portion 212 cannot satisfy the test standard of the battery needle test.

[0069] The value of α can be 45°, 46°, 47°, 48°, 49°, 50°, 51°, 52°, 53°, 54°, 55°, 56°, 57°, 58°, 59°, 60°. The value of α is not limited to the listed values, and other values in the range are also applicable.

[0070] In some embodiments of the present application, the needle body 21 can be a steel needle, a tungsten steel needle, a copper needle, a plastic needle, etc.

[0071] Based on the above description of the needle structure 1000, the needle structure 1000 in the embodiments of the present application can be applied in the following needle test.

[0072] Example 1: A battery having a capacity of 140 ampere-hours and an outer dimension of 50 (thickness: mm) * 180 (width: mm) * 90 (height: mm), a test requiring a needle body 21 having a diameter of 5 mm to penetrate the battery, i.e., a size of L4 of the mounting member 1 of 200 mm, a size of L2 of the needle body 21 of 60 to 80 mm, and a size of L3 of the main body portion 211 of 5 mm of the needle structure 1000 are selected to perform the puncture operation.

[0073] Example 2: A battery having a capacity of 280 ampere-hours and an outer dimension of 68 (thickness: mm) * 150 (width: mm) * 180 (height: mm), a test requiring a needle body 21 having a diameter of 6 mm to penetrate the battery, i.e., a size of L4 of the mounting member 1 of 200 mm, a size of L2 of the needle body 21 of 80 mm, and a size of L3 of the main body portion 211 of 5 mm of the needle structure 1000 are selected to perform the puncture operation.

[0074] Example 3: A battery having a capacity of 580 ampere-hours and an outer dimension of 68 (thickness: mm) * 320 (width: mm) * 180 (height: mm), a test requiring a needle body 21 having a diameter of 8 mm to penetrate the battery, i.e., a size of L4 of the mounting member 1 of 200 mm, a size of L2 of the needle body 21 of 80 mm, and a size of L3 of the main body portion 211 of 8 mm of the needle structure 1000 are selected to perform the puncture operation.

[0075] Example 4: A battery having a capacity of 280 ampere-hours and an outer dimension of 68 (thickness: mm) * 150 (width: mm) * 180 (height: mm), a test requiring a needle body 21 having a diameter of 6 mm to penetrate the battery by 10 mm, i.e., a size of L4 of the mounting member 1 of 200 mm, a size of L2 of the needle body 21 of 80 mm, and a size of L3 of the main body portion 211 of 6 mm of the needle structure 1000 are selected to perform the puncture operation, and the depth of the needle body 21 entering the mounting groove 3 is adjusted to a size of 10 to 30 mm.

[0076] Example 5: A battery having a capacity of 580 ampere-hours and an outer dimension of 68 (thickness: mm) * 320 (width: mm) * 180 (height: mm), a test requiring a needle body 21 having a diameter of 8 mm to penetrate the battery by 30% of the thickness of the battery, i.e., a size of L4 of the mounting member 1 of 200 mm, a size of L2 of the needle body 21 of 40 to 50 mm, and a size of L3 of the main body portion 211 of 8 mm of the needle structure 1000 are selected to perform the puncture operation, and the depth of the needle body 21 entering the mounting groove 3 is adjusted to a size of 19.6 to 29.6 mm.

[0077] Embodiment six: the battery with a capacity of 580 ampere-hours, an outer size of 68 (thickness: mm) * 320 (width: mm) * 180 (height: mm), and a test requirement that the needle body 21 with a diameter of 8 mm penetrates the battery, that is, the size of L4 of the mounting piece 1 is 200 mm, the size of L2 of the needle body 21 is 80 mm to 90 mm, the size of L3 of the main body part 211 is 8 mm, the needle piercing structure 1000 is used for puncture operation, and the depth size of the needle body 21 entering into the mounting groove 3 is adjusted to 12 mm to 22 mm.

[0078] Wherein, the test steps are as follows:

[0079] Step S1: Ensure that the surface of the needle body 21 of the needle piercing structure 1000 is smooth, free of rust, oxidation layer and oil stains, and penetrate the battery from the direction perpendicular to the battery monomer plate at a speed of (20±5) mm / s, the penetration position can be close to the geometric center of the pierced surface, the needle body 21 stays in the battery, and the accuracy and safety of the test are ensured.

[0080] Step S2: disassemble the needle piercing structure 1000 from the battery and scrap it, and check and clean the mounting piece 1 for next use.

[0081] The application also provides a needle piercing device, which comprises the needle piercing structure 1000, and the needle piercing structure 1000 is as described above. Since the needle piercing device adopts all the technical solutions of the above embodiments, it at least has the beneficial effects brought by the technical solutions of the above embodiments, which will not be repeated here.

[0082] The above has introduced the embodiments of the application in detail, and the principle and implementation mode of the application have been described by applying specific examples. The above embodiment description is only used to help understand the method of the application and its core idea; meanwhile, for those skilled in the art, according to the idea of the application, the specific implementation mode and application range will be changed, and the above description should not be understood as the limitation of the application.

Claims

1. A needle-punched structure, characterized in that, The application relates to a needle structure for puncturing a battery. The needle structure comprises: a mounting member configured to be mounted in a needle puncturing device; and a needle member detachably mounted on one end of the mounting member in a first direction. The needle member extends in the first direction, and one end of the needle member is configured to puncture a battery.

2. The needle-punched structure according to claim 1, characterized in that The mounting member has a plurality of mounting positions, and the extension length of the needle member can be adjusted.

3. The needle structure of claim 2, wherein, The needle member comprises a needle body extending in the first direction and a connecting portion connected to one end of the needle body, and the connecting portion is detachably mounted on the mounting member. The mounting member comprises opposite two ends in the first direction, and at least one of the two ends of the mounting member is provided with a mounting groove.

4. The needle structure of claim 3, wherein, The connecting portion is detachably mounted in the mounting groove. The mounting groove has a plurality of mounting positions arranged in the first direction.

5. The needle structure of claim 3, wherein, The connecting portion can be assembled on any mounting position.

6. The needle structure of claim 3, wherein The connecting portion is screwed or clamped in the mounting groove. The mounting groove comprises a groove bottom and an opening arranged oppositely in the first direction.

7. The needle structure of claim 2, wherein In the first direction, the dimension from the side of the connecting portion close to the groove bottom of the mounting groove to the opening of the mounting groove is defined as L1, and the L1 satisfies 10mm<=L1<=90mm.

8. The needle structure of claim 2, wherein, The dimension of the needle body in the first direction is defined as L2, and the L2 satisfies 20mm<=L2<=100mm. The needle body comprises a body portion extending in the first direction and connected to the connecting portion.

9. The needle structure of claim 8, wherein, The dimension of the body portion in a second direction intersecting with the first direction is defined as L3, and the L3 satisfies 0mm The needle body further comprises a needle tip portion arranged at one end of the body portion away from the connecting portion, and the needle tip portion has a tip end and a connecting end.

10. The needle-punched structure according to any one of claims 1 to 9, characterized in that, In the cross section formed by the first direction and the second direction, the needle tip portion further comprises a first edge and a second edge connecting the tip end and the connecting end, and the angle of the included angle formed by one end of the first edge and the second edge is alpha, and the alpha satisfies 45<=alpha<=60.

11. A needling device characterized in that, The dimension of the mounting member in the first direction is defined as L4, and the L4 satisfies 200mm<=L4<=270mm. The application further relates to a needle puncturing device comprising the needle structure as claimed in any one of claims 1 to 10.

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