Cylindrical battery test fixture

Abstract

The application provides a cylindrical battery test tool, which comprises a base, a positive electrode connecting piece and a negative electrode connecting piece, the base cover is arranged at the end of the cylindrical battery, the base comprises a first through hole and a second through hole, the first through hole is sleeved on the outer circumferential side of the positive electrode of the cylindrical battery and is communicated with the positive electrode of the cylindrical battery, and the second through hole is arranged separately from the first through hole and is communicated with the negative electrode of the cylindrical battery; one end of the positive electrode connecting piece is located in the first through hole and is connected with the positive electrode of the cylindrical battery; and one end of the negative electrode connecting piece is located in the second through hole and is connected with the negative electrode of the cylindrical battery. The application solves the problem that the positive electrode and the negative electrode are prone to short circuit when the cylindrical battery with the positive electrode and the negative electrode on the same side is tested in the prior art.

Description

Technical Field

[0001] This application relates to the field of battery testing technology, and more specifically, to a cylindrical battery testing fixture. Background Technology

[0002] Electrical performance testing is a crucial part of battery research and development. Before conducting electrical performance tests, connectors need to be welded to the battery to connect to the wiring harness of the charging and discharging equipment. Because the positive and negative terminals of a large cylindrical battery are designed on the same side, this structural characteristic results in the connectors welded to the positive and negative terminals being very close together. If proper insulation measures are not taken before testing, such as the common practice of using insulating tape to achieve insulation, the positive terminal connector can easily come into contact with the negative terminal under external force, causing a short circuit. Utility Model Content

[0003] The main objective of this application is to provide a cylindrical battery testing fixture to solve the problem in the prior art that short circuits easily occur between the positive and negative electrodes when testing cylindrical batteries with the positive and negative electrodes on the same side.

[0004] To achieve the above objectives, according to one aspect of this application, a cylindrical battery testing fixture is provided, including a base, a positive electrode connector, and a negative electrode connector. The base is disposed on the end of the cylindrical battery and includes a first through hole and a second through hole. The first through hole is sleeved on the outer periphery of the positive electrode of the cylindrical battery and communicates with the positive electrode of the cylindrical battery. The second through hole is separated from the first through hole and communicates with the negative electrode of the cylindrical battery. One end of the positive electrode connector is located in the first through hole and is connected to the positive electrode of the cylindrical battery. One end of the negative electrode connector is located in the second through hole and is connected to the negative electrode of the cylindrical battery.

[0005] Furthermore, the second through hole is located on the outer periphery of the first through hole, and there is a separating rib between the first through hole and the second through hole for separation.

[0006] Furthermore, the base includes a first mounting plate and a second mounting plate connected to each other. The first mounting plate has a first through hole at its end near the second mounting plate, and the second mounting plate has a second through hole at its end near the first mounting plate. The projections of the first mounting plate and the second mounting plate onto the end of the cylindrical battery are located outside the range of the end of the cylindrical battery.

[0007] Furthermore, the first mounting plate has a first mounting groove, the second mounting plate has a second mounting groove, the first mounting groove and the second mounting groove are separated, the first mounting groove communicates with the first through hole, the positive electrode connector is located in the first mounting groove, the second mounting groove communicates with the second through hole, and the negative electrode connector is located in the second mounting groove.

[0008] Furthermore, multiple positive and negative terminals are provided, and multiple first and second mounting slots are provided. The positive terminal terminals are provided in a one-to-one correspondence with the first mounting slots, and the negative terminal terminals are provided in a one-to-one correspondence with the second mounting slots.

[0009] Furthermore, the base has a mounting recess that is fitted onto the end of the cylindrical battery. The mounting recess and the first mounting groove are respectively located on opposite sides of the base. The first through hole and the second through hole are both connected to the mounting recess.

[0010] Furthermore, the base also includes: a first positioning protrusion located in a first mounting groove, the positive electrode connector having a first positioning hole, the first positioning protrusion located in the first positioning hole; and / or a second positioning protrusion located in a second mounting groove, the negative electrode connector having a second positioning hole, the second positioning protrusion located in the second positioning hole.

[0011] Furthermore, the cylindrical battery testing fixture also includes a cover, which is placed on the base and covers the first mounting slot and the second mounting slot.

[0012] Furthermore, one of the base and the cover has a snap-fit ​​groove, and the other of the base and the cover has a snap-fit ​​protrusion. When the cover is placed on the base, the snap-fit ​​protrusion is located within the snap-fit ​​groove.

[0013] Furthermore, the cylindrical battery testing fixture also includes a positive electrode connection wire and a negative electrode connection wire. The positive electrode connection wire is connected to the positive electrode connector and is used to connect to the charging and discharging equipment; the negative electrode connection wire is connected to the negative electrode connector and is used to connect to the charging and discharging equipment.

[0014] Furthermore, the cylindrical battery testing fixture also includes fasteners. The positive electrode connection wire is connected to the positive electrode connector through the fasteners, and the negative electrode connection wire is connected to the negative electrode connector through the fasteners. The cover has a clearance groove for avoiding the fasteners, and clearance grooves are provided at both ends of the cover.

[0015] By applying the technical solution of this application, the positive and negative electrodes of the cylindrical battery are effectively isolated in space through the separately configured first and second through holes, thereby avoiding the risk of short circuits caused by the positive and negative electrodes being too close together. Specifically, one end of the positive and negative electrodes is located in the first and second through holes, respectively, and establishes a stable connection with the positive and negative electrodes of the cylindrical battery, thereby completely isolating the positive and negative electrodes and completely eliminating the risk of short circuits caused by accidental contact between the positive and negative electrodes, thus improving the safety and reliability of the cylindrical battery during charge and discharge testing. Attached Figure Description

[0016] The accompanying drawings, which form part of this application, are used to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are used to explain this application and do not constitute an undue limitation of this application. In the drawings:

[0017] Figure 1 An exploded view of the cylindrical battery testing fixture of this application is shown;

[0018] Figure 2 A schematic diagram of the base structure of this application is shown;

[0019] Figure 3 The diagram shows the structure of the base, positive electrode connector, negative electrode connector, and cylindrical battery of this application.

[0020] Figure 4 This diagram shows the structure of the cylindrical battery testing fixture of this application without the cover installed;

[0021] Figure 5 A schematic diagram of the structure of the cover of this application is shown;

[0022] Figure 6 A schematic diagram of the cylindrical battery testing fixture of this application is shown;

[0023] Figure 7 A schematic diagram of the structure of the clearance groove on the cover is shown.

[0024] The above figures include the following reference numerals:

[0025] 10. Base; 11. First through hole; 12. Second through hole; 13. Dividing rib; 14. First mounting groove; 15. Second mounting groove; 16. Mounting recess; 17. First positioning protrusion; 18. Second positioning protrusion; 19. Snap-fit ​​groove; 20. Positive electrode connector; 21. First positioning hole; 30. Negative electrode connector; 31. Second positioning hole; 40. Cover; 41. Snap-fit ​​protrusion; 42. Clearance groove; 50. Positive electrode connecting wire; 60. Negative electrode connecting wire; 70. Fastener; 80. Cylindrical battery. Detailed Implementation

[0026] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0027] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0028] In this application, unless otherwise stated, directional terms such as "upper," "lower," "top," and "bottom" are generally used in relation to the direction shown in the accompanying drawings, or in relation to the vertical, perpendicular, or gravitational direction of the component itself; similarly, for ease of understanding and description, "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not intended to limit this application.

[0029] To address the problem of short circuits easily occurring between the positive and negative electrodes when testing cylindrical batteries with the same positive and negative electrodes on the same side in the prior art, this application provides a cylindrical battery testing fixture.

[0030] like Figures 1 to 7 The cylindrical battery testing fixture shown includes a base 10, a positive electrode connector 20, and a negative electrode connector 30. The base 10 covers the end of the cylindrical battery 80 and includes a first through hole 11 and a second through hole 12. The first through hole 11 is fitted around the outer periphery of the positive electrode of the cylindrical battery 80 and communicates with the positive electrode of the cylindrical battery 80. The second through hole 12 is separated from the first through hole 11 and communicates with the negative electrode of the cylindrical battery 80. One end of the positive electrode connector 20 is located in the first through hole 11 and is connected to the positive electrode of the cylindrical battery 80. One end of the negative electrode connector 30 is located in the second through hole 12 and is connected to the negative electrode of the cylindrical battery 80.

[0031] This embodiment ensures that the positive and negative terminals of the cylindrical battery 80 are effectively isolated in space by using a first through hole 11 and a second through hole 12, thereby avoiding the risk of short circuits caused by the positive terminal connector 20 and the negative terminal connector 30 being too close together. Specifically, one end of the positive terminal connector 20 and the negative terminal connector 30 are located in the first through hole 11 and the second through hole 12, respectively, and establish stable connections with the positive and negative terminals of the cylindrical battery 80, thereby completely isolating the positive terminal connector 20 and the negative terminal connector 30 and completely eliminating the risk of short circuits caused by accidental contact between the positive terminal connector 20 and the negative terminal connector 30, thus improving the safety and reliability of the cylindrical battery 80 during charge and discharge testing.

[0032] In this embodiment, the second through hole 12 is located on the outer periphery of the first through hole 11, and extends circumferentially along the first through hole 11. A separating rib 13 is provided between the first through hole 11 and the second through hole 12 for separation, thereby effectively separating the positive electrode connecting piece and the negative electrode connecting piece, preventing direct current flow between them, and thus avoiding the risk of short circuit. Specifically, the ends of the cylindrical battery 80 where the positive and negative electrodes are located are generally circular, with the positive electrode located in the middle of the circle and the negative electrode surrounding the positive electrode to form a ring. The structure of the first through hole 11 and the second through hole 12 in this embodiment is designed to adapt to this positive and negative electrode structure of the cylindrical battery 80. Therefore, the first through hole 11 is circular, and the second through hole 12 can be a fan-shaped structure with the sharp corners removed, matching the negative electrode structure. This allows the second through hole 12 to be aligned with the position of the negative electrode of the cylindrical battery 80, ensuring complete insulation from the positive electrode when the negative electrode connector is connected to the negative electrode of the cylindrical battery 80 through the second through hole 12, thus preventing short circuits. Figure 2 , Figure 4 In this embodiment, the separator 13 is arc-shaped. The separator 13 also serves as part of the cylindrical sidewall of the first through-hole 11 and simultaneously as part of the arc-shaped inner wall of the second through-hole 12, thereby achieving effective isolation between the positive and negative electrodes. Of course, the shape and position of the separator 13 can be adjusted according to specific needs to adapt to different models and specifications of large cylindrical batteries 80.

[0033] In this embodiment, the base 10 includes a first mounting plate and a second mounting plate connected to each other. The first mounting plate has a first through hole 11 at its end near the second mounting plate, and the second mounting plate has a second through hole 12 at its end near the first mounting plate. The projections of the first and second mounting plates onto the end of the cylindrical battery 80 are located outside the range of the end of the cylindrical battery 80, enabling the electrical signals drawn from the positive and negative terminals of the cylindrical battery 80 to be transmitted outside the range of the end of the cylindrical battery 80, thus avoiding the risk of short circuit. Specifically, in this embodiment, both the first and second mounting plates are configured as elongated plate-like structures, and the first and second mounting plates extend in the same direction. The first and second mounting plates are separated by a partition rib 13, thereby ensuring that the positive and negative signals of the cylindrical battery 80 are guided to different directions, avoiding short circuit. Considering that the positive and negative terminals of the cylindrical battery 80 are not on the same plane, the first mounting plate and the second mounting plate can be set to be staggered. That is, the first mounting plate and the second mounting plate are set to be parallel, but not coplanar. This allows the first mounting plate to be closer to the positive terminal of the cylindrical battery 80, and the second mounting plate to be closer to the negative terminal of the cylindrical battery 80.

[0034] In this embodiment, the first mounting plate has a first mounting groove 14, and the second mounting plate has a first mounting groove 14 and a second mounting groove 15 separated from each other. The first mounting groove 14 and the second mounting groove 15 are respectively located on opposite sides of the first through hole 11. The first mounting groove 14 communicates with the first through hole 11. The positive electrode connector 20 is located in the first mounting groove 14, and the second mounting groove 15 communicates with the second through hole 12. The negative electrode connector 30 is located in the second mounting groove 15, thereby ensuring that the positive electrode connector 20 and the negative electrode connector 30 will not interfere with each other during installation. At the same time, when welding with the positive and negative electrodes of the cylindrical battery 80, the positions of the positive electrode connector, the negative electrode connector, and the base 10 are fixed, thereby ensuring the stability of the connection. Moreover, placing the positive electrode connector 20 and the negative electrode connector 30 in independent grooves can effectively avoid external pulling force acting directly on the welding point, reduce the risk of the positive electrode connector and the negative electrode connector detaching, and ensure the reliability of current and voltage signal transmission during the testing process. Specifically, as Figure 2 , Figure 3 As shown, in this embodiment, the first mounting groove 14 extends through the first mounting plate along its length, and the second mounting groove 15 extends through the second mounting plate along its length. Both the first mounting groove 14 and the second mounting groove 15 are located on the side of the base 10 away from the cylindrical battery 80, thus facilitating the installation and lead-out of the positive electrode connector 20 and the negative electrode connector 30. The dividing line between the first mounting groove 14 and the second mounting groove 15 is also defined by the partition rib 13. The first mounting groove 14 extends towards the side of the first through hole 11 away from the partition rib 13, and the second mounting groove 15 extends towards the side of the second through hole 12 away from the partition rib 13. This ensures that the first mounting groove 14 and the second mounting groove 15 are aligned in the width direction and separated from each other in the length direction, thereby limiting the positions of the positive electrode connector 20 and the negative electrode connector 60, preventing free movement of the positive electrode connector 20 and the negative electrode connector 30, and ensuring effective isolation between the positive electrode connector and the negative electrode connector. Preferably, the end of the first mounting groove 14 near the first through hole 11 is set as a semi-circular end to match the shape of the first through hole 11, and the end of the second mounting groove 15 near the second through hole 12 is set as an arc to match the shape of the second through hole 12. Correspondingly, the positive electrode connector 20 can also be set as a sheet structure with one end being semi-circular, and the negative electrode connector 30 can be set as a sheet structure with one end being arc, thereby facilitating the matching of the positive electrode connector 20 with the first mounting groove 14 and the negative electrode connector 30 with the second mounting groove 15, and avoiding reverse installation.

[0035] In this embodiment, the positive electrode connector 20 and the negative electrode connector 30 are both connected to the positive and negative electrodes of the cylindrical battery 80 by welding, then separated by the partition rib 13, and positioned by the first mounting groove 14 and the second mounting groove 15, thereby achieving complete separation of the positive electrode connector 20 and the negative electrode connector 30.

[0036] In this embodiment, multiple positive electrode connectors 20 and multiple negative electrode connectors 30 are provided, as are multiple first mounting slots 14 and multiple second mounting slots 15. The positive electrode connectors 20 and the first mounting slots 14 are arranged in a one-to-one correspondence, and the negative electrode connectors 30 and the second mounting slots 15 are also arranged in a one-to-one correspondence. This ensures that each connector has an independent and precise fixed position, thereby improving connection stability and facilitating parallel testing of multiple tests, thus improving testing efficiency. Specifically, this embodiment provides two positive electrode connectors 20 and two negative electrode connectors 30, along with two first mounting slots 14 and two second mounting slots 15. Considering that the wider connectors experience higher temperatures during overcurrent, while the narrower connectors do not participate in overcurrent but only in voltage monitoring, resulting in a slower temperature rise, this avoids the impact of high temperatures on voltage monitoring. To meet the voltage and current testing requirements of the cylindrical battery 80, the two positive electrode connectors 20 include one wider current monitoring connector and one narrower voltage monitoring connector, thus separating the monitoring of current and voltage without interference, which helps improve measurement accuracy. Similarly, the two first mounting slots 14 include a wider first mounting slot 14 for mounting the current monitoring connector and a narrower first mounting slot 14 for mounting the voltage monitoring connector. The arrangement of the negative connector 30 and the second mounting slot 15 is the same and will not be described again.

[0037] It should be noted that the width direction mentioned in this embodiment refers to the radial direction perpendicular to the cylindrical battery 80. In other embodiments not shown in the figures, the number and arrangement of the connectors can be further adjusted and optimized according to the specific application environment to achieve the best electrical performance and mechanical stability.

[0038] In this embodiment, the base 10 has a mounting recess 16, which is fitted onto the end of the cylindrical battery 80, thereby limiting the base 10 at the end of the cylindrical battery 80. This ensures accurate positioning and stable installation of the positive and negative electrode connectors, preventing displacement during testing. The mounting recess 16 and the first mounting groove 14 are respectively located on opposite sides of the base 10. The first through hole 11 and the second through hole 12 are both connected to the mounting recess 16, ensuring that the positive electrode connector 20 and the negative electrode connector 30 can be connected to the positive and negative electrodes of the cylindrical battery 80 through the paths of the first through hole 11 and the second through hole 12. Specifically, in this embodiment, the mounting recess 16 is designed as a circular recess to match the circular end of the cylindrical battery 80. This ensures that when the base 10 is mounted on the cylindrical battery 80, the end of the cylindrical battery 80 is located within the circular recess, thereby locking the relative positions of the base 10 and the cylindrical battery 80. This guarantees that the positive electrode connector 20 and the negative electrode connector 30 are reliably fixed when mounted on the base 10, preventing the connectors from detaching from the cylindrical battery 80 due to instability of the base 10. Furthermore, this design allows the base 10, positive electrode connector 20, and negative electrode connector 30 to be reused, reducing testing costs and demonstrating good practicality. Of course, the fixing of the base 10 and the cylindrical battery 80 is not limited to this specific design. The shape of the mounting recess 16 can be adjusted, or the position of the through hole can be changed, to accommodate cylindrical batteries 80 of different sizes or types, achieving wider applicability and flexibility.

[0039] In this embodiment, when the positive electrode connector 20 and the negative electrode connector 30 are removed from the cylindrical battery 80, the connectors can be pried up from the first mounting slot 14 and the second mounting slot 15 using a rigid tool, such as a flathead screwdriver, and then the connectors can be pulled out using a vise. After the connectors are removed, the base 10 can be removed from the cylindrical battery 80 and can be reused.

[0040] In this embodiment, the base 10 further includes: a first positioning protrusion 17 located within a first mounting groove 14, the positive electrode connector 20 having a first positioning hole 21, the first positioning protrusion 17 located within the first positioning hole 21; and / or a second positioning protrusion 18 located within a second mounting groove 15, the negative electrode connector 30 having a second positioning hole 31, the second positioning protrusion 18 located within the second positioning hole 31. Thus, the position of the positive electrode connector 20 within the first mounting groove 14 can be locked by the first positioning protrusion 17, and the position of the negative electrode connector 30 within the second mounting groove 15 can be locked by the second positioning protrusion 18, thereby ensuring the reliability and stability of the cylindrical battery testing fixture. Specifically, in this embodiment, each of the multiple first mounting slots 14 is provided with a first positioning protrusion 17, and each of the multiple positive electrode connectors 20 is provided with a first positioning hole 21. This ensures that the positive electrode connector 20 is correctly positioned, that one end of the positive electrode connector 20 can be reliably connected to the positive electrode of the cylindrical battery 80, and that the position of the positive electrode connector 20 is consistent in each test. Similarly, each of the multiple second mounting slots 15 is provided with a second positioning protrusion 18, and each of the multiple negative electrode connectors 30 is provided with a second positioning hole 31. This ensures that the negative electrode connector 30 is correctly positioned, that one end of the negative electrode connector 30 can be reliably connected to the negative electrode of the cylindrical battery 80, and that the position of the negative electrode connector 30 is consistent in each test, thereby improving the accuracy of the test results. Furthermore, the combined use of the positioning protrusions and positioning holes simplifies the installation process, eliminating the need for complex calibration steps to ensure correct installation of the connector, thus further improving testing efficiency. Of course, in other embodiments not shown, the shape of the positioning protrusions and the size of the positioning holes can be adjusted according to the specific needs of the connector to adapt to different types of batteries and testing environments.

[0041] In this embodiment, the cylindrical battery testing fixture also includes a cover 40, which covers the base 10 and blocks the first mounting groove 14 and the second mounting groove 15. This reliably confines the positive electrode connector 20 and the negative electrode connector 30 within the first mounting groove 14 and the second mounting groove 15, preventing accidental contact between the positive electrode connector 20 and the negative electrode connector 30 due to external forces such as dragging, thereby reducing the risk of short circuits. Specifically, as... Figure 5 , Figure 6As shown, the cover 40 in this embodiment is a cap-like structure with openings at both ends, thereby sealing the side of the first mounting groove 14 and the second mounting groove 15 away from the mounting recess 16. This confines the positive electrode connector 20 and the negative electrode connector 30 within the first mounting groove 14 and the second mounting groove 15, respectively, effectively enhancing safety during the testing process and preventing accidental contact between external conductors and the positive and negative electrodes of the battery, thus preventing short circuits. It also protects the connecting pieces from external interference, ensuring the accuracy and consistency of test data. Furthermore, the cover 40 helps maintain the cleanliness of the inside of the testing fixture, preventing dust or impurities from affecting the battery test results. Of course, the specific structural form of the cover 40 in this embodiment can be adjusted according to actual needs, such as adding a locking mechanism to improve sealing, or setting a transparent observation window for real-time monitoring of the test progress. In subsequent reuse of the cylindrical battery testing fixture, the detachable design of the cover 40 and the base 10 allows for easy separation from the base 10, facilitating maintenance and replacement. It also helps reduce testing costs, as a new cover 40 is not required for each test; only periodic cleaning or inspection is needed.

[0042] In this embodiment, one of the base 10 and the cover 40 has a snap-fit ​​groove 19, and the other has a snap-fit ​​protrusion 41. When the cover 40 is placed on the base 10, the snap-fit ​​protrusion 41 is located within the snap-fit ​​groove 19, thereby ensuring that the base 10 and the cover 40 can be easily assembled and disassembled, and improving the overall structural stability of the cylindrical battery testing fixture. This snap-fit ​​design not only simplifies the assembly process but also ensures structural safety during battery testing, preventing loosening of the connection due to accidental mechanical forces, thus avoiding potential short-circuit risks. Simultaneously, this snap-fit ​​structure is easy to disassemble, facilitating subsequent reuse, reducing testing costs and improving efficiency. Specifically, in this embodiment, the cover 40 has snap-fit ​​protrusions 41 on both opposite sides, and the base 10 has snap-fit ​​grooves 19 on both opposite sides. Through the matching of the snap-fit ​​protrusions 41 and the snap-fit ​​grooves 19, the cylindrical battery testing fixture can withstand the tension of external wiring harnesses, etc., during the testing of the cylindrical battery 80, maintaining a reliable connection between the connector and the cylindrical battery 80, ensuring the continuity of the test and the accuracy of the data. In this embodiment, the cover 40 has a base plate and two oppositely arranged side plates, forming a cover-like structure. The snap-fit ​​protrusions 41 are located on the inner sides of the two side plates. Preferably, the side of the snap-fit ​​protrusion 41 away from the base plate has a bendable portion. Thus, when removing the cover 40 from the base 10, the bendable portion can be manually operated to deform the snap-fit ​​protrusion 41 and disengage it from the snap-fit ​​groove 19, thereby facilitating quick and easy separation of the cover 40 and the base 10.

[0043] In this embodiment, the cylindrical battery testing fixture also includes a positive electrode connection line 50 and a negative electrode connection line 60. The positive electrode connection line 50 is connected to the positive electrode connector 20 and is used to connect to the charging and discharging equipment; the negative electrode connection line 60 is connected to the negative electrode connector 30 and is used to connect to the charging and discharging equipment, thereby realizing the effective connection between the cylindrical battery 80 and the charging and discharging equipment. Specifically, in this embodiment, the positive electrode connection line 50 is located between the positive electrode connector 20 and the external charging and discharging equipment, and the negative electrode connection line 60 is located between the negative electrode connector 30 and the external charging and discharging equipment, thereby extending the signals transmitted by the positive electrode connector 20 and the negative electrode connector 30 from the space between the cover 40 and the base 10, thereby realizing the effective connection between the cylindrical battery 80 and the external charging and discharging equipment, and thus realizing the charging and discharging test of the cylindrical battery 80. Similar to the fact that both the positive electrode connector 20 and the negative electrode connector 30 are provided with multiple connections, both the positive electrode connecting wire 50 and the negative electrode connecting wire 60 are also provided with multiple connections, so as to achieve a one-to-one correspondence between the positive electrode connector 20 and the positive electrode connecting wire 50, and a one-to-one correspondence between the negative electrode connector 30 and the negative electrode connecting wire 60.

[0044] In this embodiment, the cylindrical battery testing fixture also includes fasteners 70. The positive electrode connecting wire 50 is connected to the positive electrode connector 20 via the fasteners 70, and the negative electrode connecting wire 60 is connected to the negative electrode connector 30 via the fasteners 70, thereby ensuring a reliable connection between the connectors and the connecting wires. Specifically, both the positive electrode connector 20 and the negative electrode connector 30 in this embodiment are provided with through holes for the fasteners 70 to pass through. The ends of the positive electrode connecting wire 50 and the negative electrode connecting wire 60 are also provided with through holes for the fasteners 70 to pass through. The fasteners 70 pass through the through holes of the connectors and connecting wires, thereby reliably fixing the connectors and connecting wires. Optionally, the fasteners 70 can be bolts, screws, etc.

[0045] like Figure 5 , Figure 7 As shown, in this embodiment, the cover 40 has a clearance groove 42 for avoiding the fastener 70. Both ends of the cover 40 are provided with clearance grooves 42, thereby covering the fastener 70 within the space between the cover 40 and the base 10, ensuring the safety of the connection between the connector and the connecting wire. Specifically, the cover 40 in this embodiment is configured with a structure that is low in the middle and high at both ends. The high ends are the positions of the clearance grooves 42, thereby avoiding the fastener 70 protruding from the surface of the connector.

[0046] It should be noted that in this embodiment, both the base 10 and the cover 40 are designed as insulating components to ensure the insulation effect between the positive and negative electrodes of the cylindrical battery 80. For example, they can be injection molded, which is easy to manufacture, low in cost, and reusable. Compared with traditional solutions, this reduces the consumption of adhesive tape and lowers testing costs. In this embodiment, the positive and negative electrodes of the cylindrical battery 80 are designed on the same side, separated by an insulating gasket. Due to their close proximity, short circuits are prone to occur during testing.

[0047] The cylindrical battery testing fixture of this embodiment has excellent insulation performance, which can completely eliminate the risk of short circuit caused by accidental contact between the positive and negative terminals of the cylindrical battery 80. Furthermore, its stable mechanical structure can effectively resist the mechanical pulling force of the charging and discharging equipment wiring harness on the connecting pieces, ensuring the reliability of the welding connection between the positive terminal connector 20 and the negative terminal connector 30 and the battery, and preventing desoldering. Moreover, installation is convenient; while the positive and negative terminals and the positive and negative terminal connectors 30 are being welded, the base 10 is also clamped and fixed, reducing the time spent on wrapping tape for insulation compared to traditional solutions. In addition, the cylindrical battery testing fixture of this embodiment is easy to manufacture, low in cost, and reusable, reducing tape material consumption and lowering testing costs compared to traditional solutions.

[0048] It should be noted that "multiple" in the above embodiments refers to at least two.

[0049] As can be seen from the above description, the embodiments of this application achieve the following technical effects:

[0050] 1. This solves the problem in existing technologies where short circuits easily occur between the positive and negative electrodes when testing cylindrical batteries with the positive and negative electrodes on the same side;

[0051] 2. By using the first and second through holes that are separated, the positive and negative terminals of the cylindrical battery can be effectively isolated in space, thereby avoiding the risk of short circuit caused by the positive and negative terminals being too close together;

[0052] 3. It has good insulation performance, which can completely eliminate the risk of short circuit caused by accidental connection of the positive and negative terminals of cylindrical batteries. Moreover, the mechanical structure is stable and can effectively resist the mechanical pulling force of the charging and discharging equipment wiring harness on the connecting piece, ensuring the reliability of the positive and negative terminal connectors and the welding connection with the battery, and avoiding desoldering.

[0053] Obviously, the embodiments described above are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort should fall within the scope of protection of this application.

[0054] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0055] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented in sequences other than those illustrated or described herein.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cylindrical battery testing fixture, characterized in that, include: A base (10) is provided on the end of a cylindrical battery (80). The base (10) includes a first through hole (11) and a second through hole (12). The first through hole (11) is sleeved on the outer periphery of the positive electrode of the cylindrical battery (80) and is connected to the positive electrode of the cylindrical battery (80). The second through hole (12) is separated from the first through hole (11) and is connected to the negative electrode of the cylindrical battery (80). A positive electrode connector (20), one end of which is located in the first through hole (11) and connected to the positive electrode of the cylindrical battery (80); A negative electrode connector (30) is provided, one end of which is located in the second through hole (12) and connected to the negative electrode of the cylindrical battery (80).

2. The cylindrical battery testing fixture according to claim 1, characterized in that, The second through hole (12) is located on the outer periphery of the first through hole (11), and there is a separating rib (13) between the first through hole (11) and the second through hole (12) for separation.

3. The cylindrical battery testing fixture according to claim 1, characterized in that, The base (10) includes a first mounting plate and a second mounting plate connected to each other. The first mounting plate has a first through hole (11) at the end near the second mounting plate, and the second mounting plate has a second through hole (12) at the end near the first mounting plate. The projections of the first mounting plate and the second mounting plate onto the end of the cylindrical battery (80) are located outside the range of the end of the cylindrical battery (80).

4. The cylindrical battery testing fixture according to claim 3, characterized in that, The first mounting plate has a first mounting groove (14), and the second mounting plate has a second mounting groove (15). The first mounting groove (14) and the second mounting groove (15) are separated. The first mounting groove (14) is connected to the first through hole (11). The positive electrode connector (20) is located in the first mounting groove (14). The second mounting groove (15) is connected to the second through hole (12). The negative electrode connector (30) is located in the second mounting groove (15).

5. The cylindrical battery testing fixture according to claim 4, characterized in that, Multiple positive electrode connectors (20) and multiple negative electrode connectors (30) are provided. Multiple first mounting slots (14) and multiple second mounting slots (15) are provided. The positive electrode connectors (20) and the first mounting slots (14) are provided in a one-to-one correspondence. The negative electrode connectors (30) and the second mounting slots (15) are provided in a one-to-one correspondence.

6. The cylindrical battery testing fixture according to claim 4, characterized in that, The base (10) has a mounting recess (16) which is sleeved on the end of the cylindrical battery (80). The mounting recess (16) and the first mounting groove (14) are respectively disposed on opposite sides of the base (10). The first through hole (11) and the second through hole (12) are both connected to the mounting recess (16).

7. The cylindrical battery testing fixture according to claim 4, characterized in that, The base (10) also includes: A first positioning protrusion (17) is located within the first mounting groove (14), and the positive electrode connector (20) has a first positioning hole (21), within which the first positioning protrusion (17) is located; and / or The second positioning protrusion (18) is located in the second mounting groove (15), and the negative electrode connector (30) has a second positioning hole (31), in which the second positioning protrusion (18) is located.

8. The cylindrical battery testing fixture according to claim 4, characterized in that, The cylindrical battery testing fixture also includes a cover (40), which covers the base (10) and blocks the first mounting groove (14) and the second mounting groove (15).

9. The cylindrical battery testing fixture according to claim 8, characterized in that, One of the base (10) and the cover (40) has a snap-fit ​​groove (19), and the other of the base (10) and the cover (40) has a snap-fit ​​protrusion (41). When the cover (40) is placed on the base (10), the snap-fit ​​protrusion (41) is located in the snap-fit ​​groove (19).

10. The cylindrical battery testing fixture according to claim 8, characterized in that, The cylindrical battery testing fixture also includes: A positive electrode connection line (50) is connected to the positive electrode connector (20) and is used to connect to a charging and discharging device; A negative electrode connecting wire (60) is connected to the negative electrode connector (30) and is used to connect to the charging and discharging device.

11. The cylindrical battery testing fixture according to claim 10, characterized in that, The cylindrical battery testing fixture also includes a fastener (70). The positive electrode connection line (50) is connected to the positive electrode connector (20) through the fastener (70). The negative electrode connection line (60) is connected to the negative electrode connector (30) through the fastener (70). The cover (40) has a relief groove (42) for avoiding the fastener (70). The relief groove (42) is provided at both ends of the cover (40).

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