A pull-out needle box structure and a battery testing needle bed

Abstract

This utility model relates to the field of battery testing equipment technology, specifically to a pull-out needle box structure and a battery testing needle bed. The pull-out needle box structure includes a box body forming an internal chamber and a fixing frame for fixing the box body. A power module is integrated and installed in the chamber of the box body for powering the probes and for testing sampling. At least one cooling fan is provided in the chamber of the box body for dissipating heat from the power module. At least one probe interface is arranged on the bottom surface of the box body. The probe interface is electrically connected to the power module. The box body is detachably mounted on the fixing frame via a pull-out structure. The purpose of this utility model is to overcome the shortcomings of the prior art and provide a pull-out needle box structure and a battery testing needle bed, solving the problems of numerous cables, high line loss, inconvenient maintenance, and poor heat dissipation in the prior art.

Description

Technical Field

[0001] This utility model relates to the field of battery testing equipment technology, specifically to a pull-out needle box structure and a battery testing needle bed. Background Technology

[0002] In the production and testing of lithium batteries, battery modules, and battery packs, bed-of-needles are crucial testing equipment. They use probes to contact the battery electrodes, enabling precise sampling of parameters such as battery voltage, internal resistance, and temperature, or conducting charge / discharge tests.

[0003] Existing battery testing beds typically house the power modules, such as programmable DC power supplies and sampling modules, in a separate external cabinet. Each test channel corresponds to a pair of probes, requiring multiple cables, including current, voltage, and temperature lines, to be routed from the external power module to the probes on the testing bed.

[0004] This architecture results in a large number of cables between the probe bed and the power cabinet, complex wiring, and long cable lengths. This not only increases costs but also introduces significant measurement errors, i.e., line loss, due to conductor resistance and distributed parameters, affecting test accuracy. When maintenance or replacement of probes or power modules is required, it is usually necessary to disassemble the entire probe board or untangle the complex wiring harness, which is cumbersome and inefficient. In addition, the centralized placement of power modules greatly increases their heat generation. If the heat cannot be dissipated quickly, it will seriously affect the normal operation of the power modules.

[0005] Therefore, there is an urgent need for a new needle bed structure probe fixing structure to solve the problems of inconvenient maintenance, complex wiring, high line loss, high cost and poor heat dissipation. Utility Model Content

[0006] The purpose of this invention is to overcome the shortcomings of the prior art and provide a pull-out needle box structure and a battery testing needle bed, solving the problems of numerous cables, high line loss, inconvenient maintenance, and poor heat dissipation in the prior art.

[0007] To achieve the above objectives, this utility model proposes a pull-out needle box structure, including a box body with an internal cavity and a fixing frame for fixing the box body; a power module is integrated and installed in the cavity of the box body for powering the probe and detecting samples; at least one cooling fan for heat dissipation of the power module is provided in the cavity of the box body; at least one probe interface is arranged on the bottom surface of the box body; the probe interface is electrically connected to the power module; the box body is detachably installed on the fixing frame through a pull-out structure.

[0008] Preferably, the box is installed on the fixing frame with the horizontal or vertical direction as the pull-out direction.

[0009] Preferably, a first slider is provided on the end face of the box body parallel to the pulling direction, and a second slide groove corresponding to and cooperating with the first slider is provided on the fixing frame; or, a first slide groove is provided on the end face of the box body parallel to the pulling direction, and a second slider corresponding to and cooperating with the first slide groove is provided on the fixing frame; and a pull handle is provided on the end face of the box body perpendicular to the pulling direction.

[0010] Preferably, a first slider is provided on the end face of the housing that is consistent with the pull-out direction; a heat dissipation hole communicating with the chamber is provided on the first slider; the cooling fan includes at least a first cooling fan that blows airflow toward the power module and a second cooling fan that guides the airflow to the heat dissipation hole.

[0011] Preferably, a limiting block is fixed at the end of the first or second slide.

[0012] Preferably, it further includes an adjusting bolt that passes through the limiting block and extends into the first sliding groove on the box body, the end of the adjusting bolt abutting against the end of the second slider on the fixing frame; or, it further includes an adjusting bolt that passes through the limiting block and extends into the second sliding groove on the fixing frame, the end of the adjusting bolt abutting against the end of the first slider on the box body.

[0013] Preferably, the housing is further provided with a positive bus output terminal, a negative bus output terminal, and a communication terminal, which are electrically connected to the power module respectively.

[0014] Preferably, the power module is configured to power at least four probes simultaneously.

[0015] In another aspect, this utility model provides a battery testing needle bed, including a needle bed frame and the aforementioned pull-out needle box structure; the fixing frame is installed on the needle bed frame.

[0016] The beneficial effects of this utility model are as follows: This utility model integrates the power module, cooling fan, and most of the connecting wires inside the needle box. External wiring is reduced from the traditional five wires per channel to only two busbars (positive and negative) and a communication line output by the entire needle box. The total length and number of wires are drastically reduced, significantly lowering line loss caused by wire resistance, improving voltage and current sampling accuracy, and saving substantial wire costs. When it is necessary to replace probes, maintain the power module, or repair internal circuitry, simply pull the entire needle box out of the needle bed; the operation is simple and quick, greatly improving equipment maintenance efficiency. As an independent functional module, the needle box has a compact structure and can be flexibly applied to various needle beds, improving the modularity and standardization of the design, facilitating mass production and replacement. The integrated cooling fan inside the needle box provides targeted forced cooling for the high-power-density power module, ensuring its long-term stable operation in a confined space and improving system reliability. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the box body in the pull-out needle box structure provided in the embodiment of this utility model;

[0018] Figure 2 This is a top view of the box body in the pull-out needle box structure provided in this embodiment of the utility model;

[0019] Figure 3 This is a side view of the box body in the pull-out needle box structure provided in this embodiment of the utility model;

[0020] Figure 4 A perspective view of the fixing bracket in the pull-out needle box provided in an embodiment of this utility model;

[0021] Figure 5 for Figure 4 Enlarged view of a portion of point A in the middle;

[0022] Figure 6 This is a schematic diagram of the battery testing needle bed provided in an embodiment of the present invention.

[0023] In the diagram: 10. Box body; 11. Power module; 111. Positive bus output terminal; 112. Negative bus output terminal; 113. Communication terminal; 12. Probe interface; 13. First slider; 131. Heat dissipation hole; 132. Guide port; 14. Pull-out handle; 15. Cooling fan; 20. Fixing bracket; 21. Second slide rail; 211. Limiting block; 212. Guide block; 213. Adjusting bolt. Detailed Implementation

[0024] The technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the protection scope of this utility model.

[0025] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element 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. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0026] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0027] The existing battery testing probe beds employ a probe and power module architecture that requires a large number of cables, complex wiring, and long cable lengths. This not only results in high costs but also introduces significant measurement errors due to wire resistance and distributed parameters, affecting test accuracy. Furthermore, when maintenance or replacement of probes or power modules is required, it typically necessitates disassembling the entire probe board or untangling the complex wiring harness, making the operation cumbersome and maintenance inefficient.

[0028] like Figures 1 to 4 As shown, addressing the technical problems existing in current mainstream solutions, this embodiment proposes a pull-out pin box structure, including a box body 10 and a fixing frame 20. The box body 10 is typically made of metal or high-strength engineering plastic, forming a sealed chamber for the integrated installation of core electrical components. The fixing frame 20 is used to support and guide the box body 10.

[0029] like Figure 1As shown, at least one multi-channel power module 11 is integrated and installed in the cavity of the housing 10 via a mounting plate. The power module 11 has power supply and high-precision sampling functions, and is used to power the probe and detect sampling. It can be configured to power four or more probes and collect signals simultaneously through the corresponding channels.

[0030] On the bottom surface of the housing 10, there are a number of probe interfaces 12 arranged neatly. The probe interfaces 12 can be high-current spring sockets or aviation plugs, or the probes can be directly set on the bottom surface of the housing 10. The probe interfaces 12 are directly electrically connected to each output channel of the power module 11 through short wires inside the housing 10, and the path is extremely short.

[0031] The box 10 is detachably mounted on the mounting bracket 20 via a pull-out structure; the pull-out direction can be horizontal or vertical. Figure 1 In this embodiment, the pulling direction is set to left and right, that is, the horizontal direction is the pulling direction. Specifically, on the left and right sides of the box 10, on the end faces parallel to the pulling direction, that is, on the top and bottom surfaces in the figure, since a probe is provided on the bottom surface, a first slider 13 is fixed on the top surface in this embodiment, which can also be designed as a first groove. Figure 4 As shown, a second slide groove 21 that slides in conjunction with the first slider 13 is provided on the inner sidewall of the fixing frame 20. Alternatively, the second slider can be designed to slide in conjunction with the first slide groove. In this embodiment, the first slider 13 and the second slide groove 21 are used as examples for detailed explanation.

[0032] On the end face of the box body 10 perpendicular to the pulling direction, that is, on the four end faces in the figure (front, back, left, and right), in this embodiment, the pulling direction is left and right pulling. Therefore, a pull handle 14 is provided on the left and right end faces to facilitate the operator to push and pull.

[0033] In order to dissipate heat from the high power density power module 11, at least one cooling fan 15 is provided in the cavity of the housing 10. The cooling fan 15 is located at the position of the heat dissipation fins of the power module 11 and is used to exhaust the hot air inside the housing 10.

[0034] like Figure 2 As shown, furthermore, a heat dissipation hole 131 communicating with the cavity is provided on the first slider 13. The cooling fan 15 is configured to guide airflow from inside the housing 10 to the heat dissipation hole 131, forming an effective exhaust air duct to expel heat from the housing 10. Specifically, the cooling fan 15 may include a first cooling fan that blows airflow toward the power module 11 and a second cooling fan that guides airflow to the heat dissipation hole 131.

[0035] like Figure 1 and Figure 3As shown, to enable power supply and transmission of sampling information for the probe, the housing 10 is equipped with a positive bus output terminal 111, a negative bus output terminal 112, and a communication terminal 113. The positive bus output terminal 111 is a positive copper busbar, and the negative bus output terminal 112 is a negative copper busbar. The input terminals of the power module 11 are connected to the positive and negative copper busbars inside the housing 10, respectively. The positive and negative copper busbars are connected to an external power supply device outside the housing 10. The communication input terminals of the power module 11 are connected to the communication terminal 113 inside the housing 10, and the communication terminal 113 is connected to an external communication device outside the housing 10 for receiving control commands and uploading sampling data. The entire probe housing connects to the external power distribution system and the host computer through these ports, making the external wiring extremely simple.

[0036] like Figure 4 and Figure 5 As shown, in the connection structure between the box body 10 and the fixing frame 20, the first slider 13 of the box body 10 and the second slide groove 21 of the fixing frame 20 slide into each other, and the first slider 13 is locked onto the second slide groove 21 by fixing screws. Alternatively, a limit block 211 can be fixed at the end of the second slide groove 21 on the fixing frame 20, that is, at the limit position of the box body 10 being pushed in. The limit block 211 is used to prevent the first slider 13 from sliding in excessively, thereby accurately positioning the installation position of the box body 10.

[0037] like Figure 2 As shown, furthermore, the head of the first slider 13 has an open notch forming a guide opening 132, and a guide block 212 is provided at the end of the second slide groove 21 to cooperate with it. After the first slider 13 slides into the second slide groove 21, the guide block 212 can guide the guide opening 132 to the correct position, thereby ensuring that the box 10 is installed in place.

[0038] like Figure 5 As shown, further, to achieve fine-tuning, an adjusting bolt 213 is also included, the threaded portion of which passes through the limiting block 211 and extends into the second slide groove 21. By turning the adjusting bolt 213, its end can abut against the end face of the first slider 13, thereby making millimeter-level precise adjustments to the final stopping position of the housing 10 to compensate for machining and assembly tolerances and ensure the alignment accuracy between the probe interfaces 12 on all needle boxes and the external probe plate.

[0039] like Figure 6As shown, based on the above-described pull-out needle box structure, this embodiment also provides a state where the needle box is applied to a battery testing needle bed. Multiple pull-out needle box structures are mounted side-by-side or in an array on the needle bed frame via their mounting brackets 20. The needle box, through its first slider 13, engages with a second sliding groove 21 machined inside the needle bed frame, allowing it to be inserted or removed entirely from the front or side of the needle bed frame. Since the wiring harness is already connected inside the box 10, once the box 10 is inserted, the main input power required by the box 10 is connected to the external power distribution system through its positive bus output terminal 111 and negative bus output terminal 112. The communication required by the box 10 is connected to the external communication system through the communication terminal 113.

[0040] When a needle box needs maintenance or replacement, the maintenance personnel disconnect its positive bus output terminal 111, negative bus output terminal 112, and communication terminal 113, loosen the fixing screws on the first slider 13 and the second slide groove 21, and then grasp the pull handle 14 to directly pull it out of the needle bed frame for offline inspection or complete replacement. The entire process does not require touching the probe plate, making the operation simple and quick, greatly improving the availability of the equipment.

[0041] This embodiment integrates the power module 11, cooling fan 15, and most of the connecting wires inside the needle box. External wiring is reduced from the traditional one wire per channel to only two busbars (positive and negative) and a communication line output from the entire needle box. This drastically reduces the total length and number of wires, significantly lowering line loss due to wire resistance, improving voltage and current sampling accuracy, and saving substantial wiring costs. When it's necessary to replace probes, maintain the power module 11, or repair internal wiring, simply pull the entire needle box out of the needle bed; the operation is simple and quick, greatly improving equipment maintenance efficiency. As an independent functional module, the needle box has a compact structure and can be flexibly applied to various needle beds, improving the modularity and standardization of the design, facilitating mass production and replacement. The integrated cooling fan 15 provides targeted forced cooling for the high-power-density power module 11, ensuring its long-term stable operation in a confined space and improving system reliability.

[0042] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A pull-out needle box structure, characterized in that: The device includes a housing that forms an internal chamber and a mounting bracket for fixing the housing; a power module is integrated and installed in the chamber of the housing for powering probes and for detection sampling; at least one cooling fan is provided in the chamber of the housing for cooling the power module; at least one probe interface is arranged on the bottom surface of the housing; the probe interface is electrically connected to the power module; the housing is detachably mounted on the mounting bracket via a pull-out structure.

2. The pull-out needle box structure according to claim 1, characterized in that: The box is installed on the fixed frame with the horizontal or vertical direction as the pull-out direction.

3. The pull-out needle box structure according to claim 2, characterized in that: A first slider is provided on the end face of the box body parallel to the pulling direction, and a second slide groove corresponding to and cooperating with the first slider is provided on the fixed frame; or, a first slide groove is provided on the end face of the box body parallel to the pulling direction, and a second slider corresponding to and cooperating with the first slide groove is provided on the fixed frame; a pull handle is provided on the end face of the box body perpendicular to the pulling direction.

4. The pull-out needle box structure according to claim 3, characterized in that: A first slider is provided on the end face of the box body that is consistent with the pull-out direction; a heat dissipation hole communicating with the chamber is provided on the first slider; the cooling fan includes at least a first cooling fan that blows airflow toward the power module and a second cooling fan that guides the airflow to the heat dissipation hole.

5. The pull-out needle box structure according to claim 3, characterized in that: A limit block is fixed at the end of the first or second slide.

6. The pull-out needle box structure according to claim 5, characterized in that: It also includes an adjusting bolt that passes through the limiting block and extends into the first sliding groove on the box body, the end of the adjusting bolt abutting against the end of the second slider on the fixing frame; or, it also includes an adjusting bolt that passes through the limiting block and extends into the second sliding groove on the fixing frame, the end of the adjusting bolt abutting against the end of the first slider on the box body.

7. The pull-out needle box structure according to claim 3, characterized in that: The housing is also provided with a positive bus output terminal, a negative bus output terminal, and a communication terminal, which are electrically connected to the power module respectively.

8. The pull-out needle box structure according to claim 3, characterized in that: The power module is configured to power at least four probes simultaneously.

9. A battery testing needle bed, characterized in that: It includes a needle bed frame and at least one pull-out needle box structure as described in any one of claims 1-8; the fixing frame is mounted on the needle bed frame.

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