Blowing type voltage needle structure

Abstract

The application relates to the technical field of probes, and specifically discloses a blowing type voltage needle structure, which comprises a hollow voltage needle and a blowing assembly. A plurality of tooth tips for piercing battery poles are formed at one end of the bottom of the hollow voltage needle. Axially inclined blowing grooves, which are perpendicular to the radial direction of the hollow voltage needle or not perpendicular to the radial direction of the hollow voltage needle, are arranged on the circumferential side of the hollow voltage needle. The blowing assembly comprises a gas pipe joint installed at one end of the tail of the hollow voltage needle and used for connecting an external blowing pipe. When the blowing type voltage needle is matched with a current needle to test an ultra-large current (more than 400 A), the blowing assembly blows air into the blowing grooves, so that the heat generated at the head of the current needle can be taken out. Compared with the natural cooling mode, the high temperature generated at the head of the probe is prevented from being transferred into the battery, so that the performance of the battery is not affected, and the blowing type voltage needle has high practicability.

Description

Technical Field

[0001] This utility model relates to the field of probe technology, and in particular to a blow-type voltage needle structure. Background Technology

[0002] With the development of new energy vehicles in China, lithium batteries, as an important component of new energy vehicles, have gradually been industrialized and their scale has continued to expand. The production of lithium batteries includes steps such as stirring, coating, cold pressing and pre-slitting, tab die-cutting and slitting, winding, baking and liquid injection, formation, feeding, plasma cleaning, cell coating, laser welding and offline testing. Among these, charge and discharge testing during the formation process is a crucial part of the production process, and probes are usually used for charge and discharge testing.

[0003] The probe typically consists of a current probe and a voltage probe. The current probe is used to pierce the oxide layer of the battery tabs and provide current for battery formation and capacity testing. The voltage probe is used to monitor the battery's charging status. Both the current probe and the voltage probe have several contacts at their tips. The voltage probe is usually inserted inside the current probe. The voltage probe typically consists of a needle tip and a needle shaft. The tip of the voltage probe usually has an insulating sleeve that is adapted to the shape of the needle tip and the needle shaft. In existing technologies, voltage probes generally do not have a blowing structure. During the testing of ultra-high currents of 400A and above, they are cooled naturally. As a result, the tip of the probe can easily generate high temperatures that are transferred to the battery, affecting the battery's performance.

[0004] To address this problem, this application discloses a blow-type voltage needle structure. Summary of the Invention

[0005] To overcome the shortcomings of the existing technology, this utility model discloses a blow-type voltage needle structure.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a blow-type voltage needle structure, including a hollow voltage needle and a blow-type assembly. The bottom end of the hollow voltage needle is formed with a plurality of tooth tips for piercing the battery terminals. The periphery of the hollow voltage needle is provided with blow-type grooves that are axially inclined, perpendicular to or not perpendicular to the radial direction. The blow-type assembly includes an air pipe connector installed at one end of the tail of the hollow voltage needle for connecting an external blow-type tube.

[0007] More preferably, the hollow voltage needle includes a hollow needle rod and a needle tip, wherein a insert is formed inside the needle tip, and the hollow needle rod is interference-fitted into the insert.

[0008] A further preferred embodiment is that a number of tooth tips are formed on the tip end face of the needle.

[0009] More preferably, the air blowing assembly is mounted on the tail end face of the hollow needle rod.

[0010] More preferably, the endotracheal connector is a cross-shaped endotracheal connector.

[0011] More preferably, the number of air-blowing grooves is set to multiple and arranged in a circular array around the axis of the hollow voltage needle.

[0012] This utility model achieves the following beneficial effects: When the air-blowing voltage probe provided in this application is used in conjunction with the current probe to test ultra-high currents of 400A or more, the heat generated at the head of the current probe can be carried away by blowing air into the air-blowing groove through the air-blowing component. Compared with the natural cooling method, the high temperature generated at the probe head is prevented from being transferred to the battery, thus not affecting the battery performance, and has high practicality.

[0013] Other features and advantages of this invention will be set forth in the following description and will be apparent in part from the description, or may be learned by practicing the invention. The objectives and other advantages of this invention can be realized and obtained through the structures pointed out in the description and the accompanying drawings. Attached Figure Description

[0014] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with the present invention and, together with the specification, serve to explain the principles of the disclosure.

[0015] Figure 1 This is a schematic diagram of the overall structure of the air-blowing voltage needle disclosed in this utility model; Figure 2 This is a schematic diagram of the installation of the air-blowing voltage needle and current needle disclosed in this utility model; Figure 3 This is an exploded view of the installation of the air-blowing voltage needle and current needle disclosed in this utility model; Figure 4 This is a schematic diagram of the peripheral closed structure of the upper insulating sleeve disclosed in this utility model; Figure 5 This is a schematic diagram of the second slot hole opened on the periphery of the upper insulating sleeve disclosed in this utility model; In the diagram: 10. Hollow voltage needle; 11. Hollow needle rod; 111. Air inlet; 12. Needle tip; 121. Tooth tip; 122. Insert; 20. Air inlet assembly; 21. Air tube connector; 30. Current needle; 31. Air hole; 40. Insulation assembly; 41. Upper insulation sleeve; 411. Slot; 42. Inner insulation sleeve; 43. Lower insulation sleeve. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] In the description of this utility model, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inner", "around" and other terms indicating orientation or positional relationship are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0018] Example To address the issue that existing voltage needles, lacking a blowing structure, easily generate high temperatures when tested with the current needle 30 for ultra-high currents, thus affecting battery performance, reference... Figure 1 As shown, this application discloses a blow-type voltage needle structure, including a hollow voltage needle 10 and a blow-type assembly 20. The bottom end of the hollow voltage needle 10 is formed with a plurality of tooth tips 121 for piercing the battery terminals. The periphery of the hollow voltage needle 10 is provided with blow-type grooves 111 that are axially inclined or perpendicular to or not perpendicular to the radial direction. In order to improve heat dissipation efficiency, the number of blow-type grooves 111 in this application is set to a plurality and arranged in a ring array around the axis of the hollow voltage needle 10. The air blowing assembly 20 includes an air pipe connector 21 installed at one end of the hollow voltage needle 10 for connecting an external air blowing pipe; if the air blowing groove 111 is axially inclined on the hollow voltage needle 10, when the air blowing assembly 20 blows air, the gas will come out from the air blowing groove 111 and move upward. The air-blowing groove 111 is radially or non-perpendicularly opened on the hollow voltage needle 10. When the air-blowing assembly 20 blows air, the gas will come out from the air-blowing groove 111 and move downward. refer to Figure 2 and Figure 3 As shown, in order to cooperate with the use of the above-mentioned air-blowing voltage needle, the air-blowing voltage needle of this application is now installed inside the current needle 30 (the head 12 of the current needle 30 has an air hole 31) and is insulated by the insulating component 40 (including the upper insulating sleeve 41, the inner insulating sleeve 42 and the lower insulating sleeve 43). Based on this, this application provides two preferred implementation schemes, as follows: The first type, reference Figure 4As shown, the periphery of the upper insulating sleeve 41 is a closed structure, and the air blowing groove 111 is opened along the axial direction of the hollow voltage needle 10. When testing a current of 400A or more, the gas blown out by the air blowing assembly 20 will be blown out from the air blowing groove 111 opened radially or non-vertically in the hollow voltage needle 10, and then directly discharged through the air hole 31 opened in the head 12 of the current needle 30, thereby taking away the heat of the probe and reducing the temperature rise.

[0019] The second option is to refer to... Figure 5 As shown, the upper insulating sleeve 41 has several slots 411 on its periphery, and the air blowing groove 111 is opened at an upward angle. When testing a current of 400A or more, the gas blown out by the air blowing assembly 20 will be blown out from the air blowing groove 111 opened at an axial angle in the hollow voltage needle 10 and blown out into several second slots 42411 opened in the upper insulating sleeve 41, generating the Bernoulli effect. At this time, the air holes 31 opened in the head 12 of the current needle 30 will draw in a large amount of air, thereby carrying away the heat of the probe and reducing the temperature rise.

[0020] In one specific embodiment, the hollow voltage needle of this application includes a hollow needle rod 11 and a needle head 12. A insert 122 is formed inside the needle head 12. The hollow needle rod 11 is interference-fitted into the insert 122. A plurality of teeth 121 are formed on the head end face of the needle head 12. An air blowing assembly 20 is installed on the tail end face of the hollow needle rod 11. By designing the hollow voltage needle as a separate structure, it is convenient to process the teeth 121, and it can reduce cost waste after the teeth 121 processing fails, which has high practicality.

[0021] To facilitate the connection between the hollow voltage needle 10 and the air blowing tube, the air tube connector 21 of this application is a cross-shaped air tube connector 21. As for how to connect the air blowing tube to the cross-shaped air tube connector 21, in specific implementation, the tail of the cross-shaped air tube connector 21 can be directly inserted into the air blowing tube.

[0022] In the description of this specification, the references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0023] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the scope of protection of this utility model.

Claims

1. A blow-type voltage needle structure, characterized in that, The device includes a hollow voltage needle (10) and an air blowing assembly (20). The bottom end of the hollow voltage needle (10) is formed with a plurality of tooth tips (121) for piercing the battery terminals. The periphery of the hollow voltage needle (10) is provided with air blowing grooves (111) that are axially inclined, perpendicular to or not perpendicular to the radial direction. The air blowing assembly (20) includes an air pipe connector (21) installed at one end of the tail of the hollow voltage needle (10) for connecting an external air blowing pipe.

2. The air-blowing voltage needle structure according to claim 1, characterized in that, The hollow voltage needle includes a hollow needle rod (11) and a needle tip (12). A insert (122) is formed inside the needle tip (12), and the hollow needle rod (11) is interference-fitted into the insert (122).

3. The air-blowing voltage needle structure according to claim 2, characterized in that, Several tooth tips (121) are formed on the head end face of the needle (12).

4. The air-blowing voltage needle structure according to claim 2, characterized in that, The air blowing assembly (20) is installed on the tail end face of the hollow needle rod (11).

5. The air-blowing voltage needle structure according to claim 4, characterized in that, The endotracheal connector (21) is a cross-shaped endotracheal connector (21).

6. The air-blowing voltage needle structure according to claim 1, characterized in that, The number of air-blowing grooves (111) is set to multiple and arranged in a ring array around the axis of the hollow voltage needle (10).

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