Battery el test probe

Abstract

The utility model discloses a battery EL test probe, including pin row seat and electrode test needle. Pin row seat's surface is equipped with a plurality of mounting holes, and electrode test needle slidingly penetrates the mounting hole, and the surface sleeve joint has a sleeve ring seat, and the sleeve ring seat outside fixedly connected with a plurality of the elastic link of spiral arrangement, the top of elastic link is fixedly connected with the top of electrode test needle, and the top surface fixedly connected with electrode test needle has electrode button. The mounting hole is linear array distribution along the length direction of pin row seat. Among them, electrode test needle stable sliding, electrode button is disc type or circular ring like convex button structure, and it is convenient for external fixture quick clamping, and electrode test needle surface is equipped with gold plating, and pin row seat adopts insulating material to make. The utility model discloses stable structure, reset sensitive, and reliable conduction, is applicable to the high accuracy detection in the battery EL test process.

Description

Technical Field

[0001] This utility model relates to the field of battery testing structure technology, specifically a battery EL testing probe. Background Technology

[0002] Currently, battery EL testing, as a crucial step in lithium battery production and quality inspection, commonly employs a probe-to-battery contact method to introduce electrical signals, enabling the detection of internal defects through electroluminescence imaging. Its core component is the battery EL test probe, and its performance directly impacts the stability and accuracy of the test.

[0003] Most existing battery EL test probes adopt a straight rod structure, with a simple spring or rubber pad providing rebound. In practical applications, this type of structure has the following shortcomings: Traditional probes rely on a single spring to provide rebound force, resulting in concentrated force points. This can easily lead to probe misalignment or wobbling during the sliding process, causing poor contact and unstable signals, thus affecting EL image quality.

[0004] After some probes are pressed down and contact the battery tabs, they rely on linear springs to reset. However, the reset stroke is uneven, and there are lags or jamming phenomena, which cannot guarantee the repeatability and stability of the electrode probes in high-frequency testing environments.

[0005] Due to the lack of proper distributed support and guidance, there is significant friction between the probe body and the hole wall, which can easily lead to wear and tear over long-term use, resulting in a shortened probe life and increased maintenance costs.

[0006] In summary, existing battery EL test probes generally suffer from structural instability, insufficient reset performance, and poor durability, making it difficult to meet the requirements of modern battery testing for high precision, repeatability, and durability. Therefore, it is necessary to provide an improved probe that achieves more stable support and more reliable reset function through a special helical structure and axial motion design, thereby improving the overall performance of battery EL testing. Utility Model Content

[0007] This utility model aims to solve one of the technical problems existing in the prior art or related technologies.

[0008] Therefore, the technical solution adopted by this utility model is as follows: a battery EL test probe, including a needle array base, an electrode probe, a collar base, elastic connecting strips, and an electrode connector. The needle array base has several mounting holes on its surface, through which the electrode probe can slide and extend to the bottom of the needle array base. A collar base is slidably fitted onto the surface of the electrode probe, and several spirally arranged elastic connecting strips are fixedly connected to the surface of the collar base, with the top ends of the elastic connecting strips fixedly connected to the top end of the electrode probe. An electrode connector is fixedly connected to the top surface of the electrode probe, and the collar base is fixed inside each mounting hole to ensure the sliding stability of the electrode probe.

[0009] In a preferred embodiment, the mounting holes are further configured such that they are arranged in a linear array along the length of the pin header, with multiple mounting holes arranged at the same spacing.

[0010] Specifically, this arrangement ensures that multiple electrode probes are arranged to correspond to the battery tabs at a standardized spacing, achieving precise alignment between the entire probe set and the battery tabs, thereby improving the consistency and stability of the test.

[0011] In a preferred embodiment, the electrode probe is further configured as follows: the electrode probe is a replaceable structure with a tapered contact head at its bottom end.

[0012] Specifically, the tapered contact head can form point contact with the battery tabs, reducing contact resistance and improving conductivity. At the same time, the electrode probe can be quickly replaced after the probe wears out, extending the overall life of the device and reducing maintenance costs.

[0013] In a preferred embodiment, the elastic link is further configured such that it is made of a conductive elastic metal wire.

[0014] Specifically, when the electrode probe slides upon contact with the battery tab, the elastic link undergoes elastic deformation and provides a rebound force, enabling the electrode probe to quickly reset after leaving the battery tab, thus ensuring the stability and reliability of the probe during repeated testing.

[0015] In a preferred embodiment, the collar seat is further configured such that a limiting snap-fit ​​structure is used to fix the mounting hole.

[0016] Specifically, the limiting buckle structure can limit and guide the electrode probe in the radial and axial directions, preventing the probe from deviating during sliding, thereby ensuring the accuracy of contact and the stability of electrical signal transmission.

[0017] In a preferred embodiment, the electrode button is further configured as a disc-shaped or annular protrusion structure.

[0018] Specifically, this structure facilitates quick clamping with external fixtures, improves the reliability of electrical connections and testing efficiency, and ensures that the detection current can be stably transmitted to the electrode probe.

[0019] In a preferred embodiment, the outer surface of the electrode probe is provided with a gold-plated layer with a thickness of 0.2-0.5 micrometers, and the probe base is made of insulating material.

[0020] Specifically, the gold plating layer effectively reduces electrical contact resistance and prevents oxidation, improving the durability of the probe under high-frequency testing; the insulating material pin header avoids short-circuit interference between multiple electrode probes, thereby improving testing accuracy and safety.

[0021] In a preferred embodiment, the elastic link is further configured as follows: the elastic link is a helical spring-like structure, which is composed of several continuously coiled conductive elastic metal wires. The metal wires are preferably nickel-plated tungsten wire, beryllium copper wire, or gold-plated stainless steel wire.

[0022] Specifically, the spiral structure provides rebound force while also providing uniform support for the electrode probe, preventing wobbling and skewness; the conductive metal wire material ensures excellent electrical performance and mechanical strength, thus maintaining stable and reliable performance during long-term testing.

[0023] The beneficial effects achieved by this utility model are as follows: 1. In this utility model, the elastic connecting strip adopts a special spiral structure design, which can provide flexible rebound force when the electrode probe slides under force, and achieve stable positioning under the evenly distributed spiral support at multiple points, thereby ensuring the contact accuracy and reliability of the electrode probe and avoiding poor contact problems caused by shaking or displacement.

[0024] 2. In this utility model, the electrode probe achieves stable axial movement under the action of the elastic connecting strip. It can automatically press down when in contact with the battery tab and quickly reset after the contact is released, thereby simplifying the test operation, improving the detection efficiency, and extending the service life of the probe. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of one embodiment of the present utility model; Figure 2 This is an exploded structural diagram of one embodiment of the present invention; Figure 3 This is a schematic diagram of the surface structure of the electrode probe according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the electrode probe and elastic connecting strip structure according to an embodiment of the present invention.

[0026] Figure label: 100. Pin header seat; 110. Mounting hole; 200. Electrode probe; 210. Elastic connecting strip; 220. Collar seat; 230. Electrode connector. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be noted that, unless otherwise specified, the embodiments and features of the present utility model can be combined with each other.

[0028] It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this invention.

[0029] The following describes, with reference to the accompanying drawings, some embodiments of a battery EL test probe provided by this utility model.

[0030] Combination Figures 1-4 As shown, this utility model provides a battery EL test probe, including a needle array base 100 and an electrode probe 200. The surface of the needle array base 100 has several mounting holes 110, through which the electrode probe 200 slidably passes and extends to the bottom end of the needle array base 100. A collar seat 220 is slidably fitted onto the surface of the electrode probe 200. Several spirally arranged elastic connecting strips 210 are fixedly connected to the surface of the collar seat 220, with the top ends of the elastic connecting strips 210 fixedly connected to the top end of the electrode probe 200. An electrode connector 230 is fixedly connected to the top surface of the electrode probe 200 for connection to an external power supply fixture or test fixture. The collar seat 220 is fixed inside each mounting hole 110, thereby ensuring the stability of the electrode probe 200 during its up-and-down sliding motion.

[0031] In this embodiment, the mounting holes 110 are arranged in a linear array along the length of the pin array 100. Multiple mounting holes 110 are arranged at the same spacing, so that multiple electrode probes 200 can be arranged in groups and correspond to the arrangement of the battery tabs, thereby ensuring the stability and accuracy of the testing process.

[0032] In this embodiment, the electrode probe 200 is designed as a replaceable structure, with a tapered contact head at its bottom for making point contact with the battery tabs. The tapered contact head reduces contact resistance and improves the reliability of electrical contact. Furthermore, the contact head can be quickly replaced after the electrode probe 200 wears out, extending the overall lifespan of the device.

[0033] In this embodiment, the elastic link 210 is made of conductive elastic metal wire and is arranged in a spiral shape. When the electrode probe 200 is subjected to an external force and slides upward or downward, the elastic link 210 deforms, providing a flexible rebound force. After the probe leaves the battery tab, it can reset the electrode probe 200 to its initial position, thereby ensuring the stability of contact during repeated testing.

[0034] In this embodiment, the collar seat 220 is fixed to the mounting hole 110 using a limiting snap-fit ​​structure. Through the cooperation of the snap teeth and the snap groove, the electrode probe 200 can be limited and guided, preventing radial displacement of the electrode probe 200 during sliding, thereby improving contact accuracy and stability.

[0035] In this embodiment, the electrode connector 230 is a disc-shaped or annular protrusion structure, which facilitates quick clamping by external clamps and enables a stable electrical connection with the power supply or test equipment, thereby improving test efficiency.

[0036] In a preferred embodiment, the outer surface of the electrode probe 200 is provided with a gold-plated layer, the thickness of which is 0.2-0.5 micrometers. The gold plating layer can effectively reduce electrical contact resistance, prevent oxidation of the probe surface, and improve durability and stability during high-frequency or long-term testing.

[0037] The pin header 100 is made of insulating material, preferably polycarbonate or polytetrafluoroethylene, which can ensure structural strength and prevent short circuits between electrode probes 200, thus ensuring the accuracy and safety of the testing process.

[0038] In this embodiment, the elastic link 210 has a helical spring-like structure, which is composed of several turns of continuously wound conductive elastic metal wire. The metal wire is preferably made of nickel-plated tungsten wire, beryllium copper wire, or gold-plated stainless steel wire to ensure good conductivity and mechanical elasticity.

[0039] The bottom end of the elastic link 210 is fixedly connected to the surface of the collar seat 220, and the top end is fastened to the top end of the electrode probe 200. Multiple elastic links 210 are evenly distributed around the outer circumference of the electrode probe 200 in a spiral arrangement. This arrangement provides a rebound force when the electrode probe 200 moves up and down, and also forms a stable radial limiting support for the electrode probe 200 under the combined action of multiple elastic links 210, preventing the electrode probe 200 from shaking.

[0040] In a preferred embodiment, the elastic link 210 has 3-6 turns, and its diameter matches the inner diameter of the mounting hole 110, thereby achieving flexible sliding and positioning within the range defined by the pin header seat 100. The pitch of the elastic link 210 can be designed as equidistant or gradually varying pitch to adjust its rebound force.

[0041] Furthermore, a small gap can be provided between the outer wall of the elastic connecting strip 210 and the inner wall of the mounting hole 110, so that it can stably support the electrode probe 200 under compression, while avoiding excessive friction that could cause jamming.

[0042] Working principle The working principle of the battery EL test probe of this utility model is as follows: In use, the needle array 100 fixes a set of electrode probes 200 through the mounting holes 110. The multiple electrode probes 200 are arranged linearly along the length direction, and their spacing corresponds to the arrangement position of the battery tabs. During the test, the operator presses the entire needle array 100 against the battery tabs, and the tapered contact head at the bottom of the electrode probe 200 makes point contact with the battery tabs.

[0043] During contact, the electrode probe 200 slides relative to the needle holder 100 under the action of external force, and the elastic link 210 deforms and generates a rebound force, thereby ensuring that the electrode probe 200 is in close contact with the battery tab. After the contact is released, the elastic link 210 restores the electrode probe 200 to its initial position through its own elastic recovery, facilitating the next test.

[0044] Meanwhile, the electrode connector 230 is connected to an external power supply fixture or testing equipment, and a stable circuit channel is formed between the gold-plated electrode probe 200 and the battery tab, thereby realizing the transmission and detection of the battery EL test signal.

[0045] The limiting buckle structure between the collar seat 220 and the mounting hole 110 ensures the stability of the electrode probe 200 during the up-and-down sliding process, avoids it from shaking in the horizontal direction, and ensures the accuracy and repeatability of the test.

[0046] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the present invention. 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.

[0047] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A battery EL test probe, characterized in that, include: The needle array (100) and electrode probe (200) are provided. The surface of the needle array (100) is provided with a plurality of mounting holes (110). The surface of the electrode probe (200) is slidably fitted with a collar seat (220). The surface of the collar seat (220) is fixedly connected with a plurality of spirally arranged elastic connecting strips (210). The top end of the elastic connecting strips (210) is fixedly connected to the top end of the electrode probe (200). The top surface of the electrode probe (200) is fixedly connected with an electrode button (230). The collar seat (220) is fixed inside each mounting hole (110). The electrode probe (200) slides through each mounting hole (110) and extends to the bottom end of the needle array (100).

2. The battery EL test probe according to claim 1, characterized in that, The mounting holes (110) are arranged in a linear array along the length of the pin header (100), and multiple mounting holes (110) are arranged at the same spacing.

3. A battery EL test probe according to claim 1, characterized in that, The electrode probe (200) is a replaceable structure, with a tapered contact head at its bottom for making point contact with the battery tab.

4. A battery EL test probe according to claim 1, characterized in that, The elastic link (210) is made of conductive elastic metal wire and provides a rebound force when the electrode probe (200) slides, so that it automatically resets after leaving the battery tab.

5. A battery EL test probe according to claim 1, characterized in that, The collar seat (220) and the mounting hole (110) are fixed by a limiting buckle structure.

6. A battery EL test probe according to claim 1, characterized in that, The electrode connector (230) is a disc-shaped or ring-shaped protrusion structure.

7. A battery EL test probe according to claim 1, characterized in that, The outer surface of the electrode probe (200) is provided with a gold plating layer with a thickness of 0.2-0.5 micrometers, and the needle holder (100) is made of insulating material.

8. A battery EL test probe according to claim 1, characterized in that, The elastic link (210) is a spiral spring-like structure, and its whole is composed of several turns of continuously coiled conductive elastic metal wire.

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