A connector for battery cell charge and discharge test

Abstract

This invention discloses a connector for battery cell charge / discharge testing, relating to the field of battery charge / discharge testing technology. It includes: a connecting post having a plug-in portion and a clamping portion for pressing the battery cell ear; a sleeve having a through hole for plugging into the plug-in portion and a slot communicating laterally with the through hole; a pressing member fitted onto the sleeve, one end of which has a clamping portion that slides within the slot; and a plurality of annular teeth spaced axially along the plug-in portion for slidingly locking with the clamping portion. This invention, by providing annular teeth spaced axially along the connecting post and by plugging the sleeve into the connecting post, allows the clamping portion of the pressing member to unidirectionally engage and lock with the annular teeth through the slot on the sleeve, thereby pressing the battery cell ear between the clamping portion of the connecting post and the end of the sleeve. This achieves rapid connection, ensures low contact resistance, avoids overheating, and allows for clamping and releasing with one hand, resulting in high battery cell ear connection efficiency.

Description

Technical Field

[0001] This invention relates to the field of battery charge and discharge testing technology, specifically a connector for battery cell charge and discharge testing. Background Technology

[0002] Battery cell charge-discharge testing is a core method for evaluating battery performance, lifespan, and safety, and is widely used in R&D, production, quality control, and secondary utilization. This test simulates the charge-discharge behavior of batteries in real-world use to obtain key parameters such as capacity, internal resistance, cycle life, and rate performance, ensuring that the battery meets the requirements of specific application scenarios.

[0003] When charging and discharging a single battery cell, the battery cell connectors need to be connected by connecting bolts. Due to the small operating space, frequent bolt tightening is time-consuming and labor-intensive, and requires two hands to operate. When charging and discharging multiple battery cells, this operation method greatly reduces the connection efficiency of the battery cell connectors. Therefore, this invention proposes a connector for battery cell charging and discharging testing. Summary of the Invention

[0004] This invention provides a connector for battery cell charging and discharging testing, aiming to solve the problem that when charging and discharging battery cells, it is necessary to connect the battery cell ears with connecting bolts, which is time-consuming and labor-intensive due to the small operating space and frequent bolt tightening.

[0005] To achieve the above objectives, the present invention provides a connector for battery cell charge / discharge testing, comprising: The connecting post has a plug-in portion and a clamping portion for clamping the battery cell lugs; the diameter of the connecting post is 4.5-5.5 mm. The socket has a through hole for insertion of the insertion part and a slot that communicates laterally with the through hole; The pressing part is fitted onto the insert sleeve, and one end of it is provided with a locking part, which slides within the slot. The insertion part is provided with several annular locking teeth at intervals along the axial direction, which slide and lock with the locking part.

[0006] Preferably, the pressing component is provided with a U-shaped sleeve, which is fitted onto the insert via an elastic component, so that the locking part connected to the end of the U-shaped sleeve is disengaged from the annular locking teeth by elastic pressing.

[0007] Preferably, the elastic component includes a limiting connecting rod, a spring, and a top plate. The U-shaped kit consists of two U-shaped rods. A round hole is provided in the middle of the U-shaped kit. The limiting connecting rod passes through the round hole and is connected to the insert sleeve. The top plate is elastically fitted on the limiting connecting rod. The top plate is connected to the inner end of the U-shaped kit and is slidably connected to the limiting connecting rod. One end of the spring abuts against the top plate.

[0008] Preferably, the elastic component includes a limiting connecting rod and a spring. The U-shaped kit is a U-shaped plate with a round hole in the middle. The limiting connecting rod passes through the round hole and is connected to the insert sleeve. The elastic component is fitted onto the limiting connecting rod, and one end of the spring abuts against the inner end of the U-shaped kit.

[0009] Preferably, a limiting plate is connected to the end of the limiting connecting rod.

[0010] Preferably, the upper part of the clamping part has an arc-shaped structure, and the bottom surface of the clamping part has a flat structure, so that the annular clamping teeth can be unidirectionally clamped to the bottom surface of the clamping part through the insertion through hole. Several L-shaped grooves are formed along the circumferential direction of the pressing part, and an L-shaped pressing member is rotatably disposed within the L-shaped groove. In the initial state, the upper part of the L-shaped pressing member is parallel to the insertion part, and the lower part of the L-shaped pressing member is perpendicular to the insertion part; the lower part of the L-shaped pressing member is provided with an inclined surface and / or an arc surface. The L-shaped pressing member is rotatably disposed within the L-shaped groove via a rotating shaft, and a torsion spring is provided on the rotating shaft.

[0011] Preferably, the upper end of the sleeve is provided with an annular pressing part, and the lower L-shaped part is pressed against the annular pressing part by rotating and descending.

[0012] Preferably, a through groove is recessed at the connection between the upper and lower parts of the L-shape.

[0013] Preferably, a limiting spring is provided inside the insert, with one end of the limiting spring connected to a limiting ring on the insert portion and the other end connected to a fixing ring at the inner end of the insert.

[0014] Compared with existing technologies, it has the following beneficial effects: This invention utilizes annular teeth spaced axially on the connecting post, and a sleeve that inserts into the connecting post. The clamping part of the pressing member engages with the annular teeth via a groove on the sleeve, thus pressing the battery cell connector between the clamping part of the connecting post and the end of the sleeve. This achieves rapid connection, ensures low contact resistance, avoids overheating, and allows for clamping and releasing with one hand, resulting in high battery cell connector connection efficiency. Furthermore, the connector of this invention is highly adaptable, compatible with battery cell connectors of varying thicknesses within a certain range. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only preferred embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of a connector for battery cell charge and discharge testing according to the present invention. Figure 2 This is a schematic diagram of the internal structure of the socket of the present invention; Figure 3 This is a schematic diagram of the insert and limiting connecting rod of the present invention; Figure 4 This is a schematic diagram of the connecting column, pressing element, and elastic component of the present invention; Figure 5 This is a schematic diagram of the limiting spring of the present invention inside the sleeve; Figure 6 This is a schematic diagram of another embodiment of the clamping part of the present invention; Figure 7 This is a schematic diagram showing the L-shaped pressure piece of the present invention rotated 90 degrees. Figure 8 This is a schematic diagram of the annular pressing part of the present invention; Figure 9 This is a schematic diagram of the L-shaped clamping member and the clamping part of the present invention; Figure 10 This is a side view of the L-shaped pressure member of the present invention; Figure 11 This is a schematic diagram of the limiting spring of the present invention inside the sleeve; Figure 12 This is a schematic diagram of the limiting spring and connecting post of the present invention; Figure 13 This is a schematic diagram of the U-shaped kit of the present invention; Figure 14 This is a schematic diagram of another embodiment of the U-shaped kit of the present invention.

[0017] Reference numerals: 1-Connecting post; 11-Insertion part; 12-Clamping part; 121-L-shaped groove; 13-Limiting ring; 2-Sleeve; 21-Through hole; 22-Slot; 23-Annular pressing part; 3-Pressing part; 31-Clamping part; 32-U-shaped kit; 4- Circular retaining teeth; 5-Elastic component; 51-Limiting connecting rod; 52-Spring; 53-Top piece; 54-Limiting piece; 6-L-type pressing part; 61-L-type upper part; 62-L-type lower part; 63-through groove; 7-Limit spring; 8-Fixing ring; 9-Battery cell connector. Detailed Implementation To better understand the structure, functional features, and advantages of the present invention, preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings: Example 1: like Figures 1 to 4 As shown, the present invention provides a connector for battery cell charge and discharge testing, comprising: The connecting post 1, which has a diameter of 5 mm, has a plug-in portion 11 and a clamping portion 12 for clamping the battery cell ear; The sleeve 2 has a through hole 21 for insertion of the insertion part 11, and a slot 22 that communicates laterally with the through hole 21. The slot 22 is located on the lower side of the sleeve 2. The pressing part 3 is sleeved on the insert 2, and one end of it is provided with a locking part 31, which slides within the slot 22. The insertion part 11 is provided with a plurality of annular locking teeth 4 at intervals along the axial direction, which slide and lock with the locking part 31 to lock the connecting post 1 in the positive direction.

[0018] See Figure 2 The pressing component 3 is provided with a U-shaped kit 32. The U-shaped kit 32 is sleeved on the insert 2 through the elastic component 5, so that the locking part 31 connected to the end of the U-shaped kit 32 is disengaged from the annular tooth 4 by elastic pressing, thereby unlocking the connecting post 1 and enabling it to move forward and backward within the insert 2. When the U-shaped kit 32 is released, the locking part 31 is reset under the action of the elastic component 5 to contact the lower end face of the annular tooth 4, thereby locking the connecting post 1 in the forward direction.

[0019] See Figure 5 A limiting spring 7 is provided inside the insert 2. One end of the limiting spring 7 abuts against the limiting ring 13 on the insertion part 11, and the other end is connected to the fixing ring 8 at the inner end of the insert 2. Specifically, the fixing ring 8 is detachably threaded to the end of the insert 2 to facilitate the removal and replacement of the limiting spring 7. By abutting the limiting spring 7 against the limiting ring 13, it is easy to pull the connecting post 1 out of the insert 2.

[0020] Since individual battery cell connectors are typically thinner and individual power cables are lighter than those of battery packs, the connectors of this invention can be easily and quickly replaced.

[0021] The working principle of this embodiment is as follows: In use, the connecting post 1 is inserted into the battery cell ear 9, and then the insert 2 is inserted into the connecting post 1, so that the annular locking teeth 4 on the connecting post 1 are locked with the locking part 31 located in the slot 22, thereby pressing the battery cell ear 9 between the locking part 12 at the end of the connecting post 1 and the end face of the insert 2; when it is necessary to disassemble the connector, press the pressing part 3 to make the locking part 31 slide in the slot 22, so that the locking part 31 is disengaged from the upper end face of the annular locking teeth 4, so that the connecting post 1 can slide out of the insert 2 in the through hole 21, thereby making it easy to remove the battery cell ear 9 from the connecting post 1.

[0022] Example 2: As another embodiment of the present invention, such as Figure 4 and Figure 13As shown, the elastic component 5 includes a limiting connecting rod 51, a spring 52, and a top plate 53. The U-shaped kit 32 consists of two U-shaped rods. A round hole is provided in the middle of the U-shaped kit 32. The limiting connecting rod 51 passes through the round hole and is connected to the insert 2. The top plate 53 is elastically sleeved on the limiting connecting rod 51. The top plate 53 is connected to the inner end of the U-shaped kit 32 and is slidably connected to the limiting connecting rod 51. One end of the spring 52 abuts against the outer wall of the insert 2, and the other end of the spring 52 abuts against the top plate 53, so that the U-shaped kit 32 can slide axially along the limiting connecting rod 51, so as to press and push the locking part 31 to move horizontally in the slot 22 to disengage from the annular locking tooth 4, thereby removing the connecting post 1 from the insert 2.

[0023] See Figure 3 The end of the limiting connecting rod 51 is connected to a limiting piece 54 to limit the U-shaped kit 32 and prevent the U-shaped kit 32 from disengaging from the limiting connecting rod 51.

[0024] See Figure 3 The limiting connecting rod 51 is threadedly connected to the threaded hole on the outer wall of the sleeve 2, so as to facilitate the disassembly of the limiting connecting rod 51 and the spring 52 for replacement.

[0025] The working principle of this embodiment is as follows: By pressing the U-shaped kit 32, it moves axially along the limiting connecting rod 51. The top plate 53 compresses the spring 52, pushing the locking part 31 at the end of the U-shaped kit 32 to slide within the slot 22, thereby disengaging from the annular locking tooth 4. This allows the connecting post 1 to move in both directions within the through hole 21. After releasing the U-shaped kit 32, under the force of the spring 52, the U-shaped kit 32 resets, causing the locking part 31 to return to its original position within the slot 22. Furthermore, in this embodiment, the maximum movement distance of the locking part 31 does not disengage from the slot 22.

[0026] Example 3: As another embodiment of the present invention, such as Figure 14 As shown, as an alternative to Embodiment 2, the elastic component 5 in this embodiment includes a limiting connecting rod 51 and a spring 52. The U-shaped kit 32 is a U-shaped plate with a round hole in the middle. The limiting connecting rod 51 passes through the round hole and connects to the insert 2. The spring 52 is elastically sleeved on the limiting connecting rod 51. One end of the spring 52 abuts against the outer wall of the insert 2, and the other end of the spring 52 abuts against the inner end of the U-shaped kit 32, so that the U-shaped kit 32 can slide axially along the limiting connecting rod 51, so as to press and push the locking part 31 to move horizontally in the slot 22 to disengage from the annular locking tooth 4, thereby removing the connecting post 1 from the insert 2.

[0027] Furthermore, a limiting piece 54 is connected to the end of the limiting connecting rod 51 to limit the U-shaped kit 32 and prevent the U-shaped kit 32 from disengaging from the limiting connecting rod 51.

[0028] Furthermore, the limiting connecting rod 51 is threadedly connected to the threaded hole on the outer wall of the sleeve 2, so as to facilitate the disassembly of the limiting connecting rod 51 and the spring 52 for replacement.

[0029] The working principle of this embodiment is as follows: By pressing the U-shaped kit 32, it moves axially along the limiting connecting rod 51, which pushes the locking part 31 at the end of the U-shaped kit 32 to slide within the slot 22, thereby disengaging from the annular locking tooth 4. This allows the connecting post 1 to move in both directions within the through hole 21. After releasing the U-shaped kit 32, under the force of the spring 52, the U-shaped kit 32 resets, causing the locking part 31 to return to its original position within the slot 22. Furthermore, in this embodiment, the maximum movement distance of the locking part 31 does not disengage from the slot 22.

[0030] Example 4: As another embodiment of the present invention, such as Figures 6 to 10 As shown, the upper part of the clamping part 31 has an arc-shaped structure, and the bottom surface of the clamping part 31 has a flat structure, so that the annular clamping teeth 4 can be inserted through the through hole 21 to clamp the bottom surface of the clamping part 31 in a positive one-way direction, so as to clamp and fix the battery cell ear 9 between the insert 2 and the pressing part 12.

[0031] See Figure 9 The pressing part 12 has several L-shaped grooves 121 circumferentially provided. An L-shaped pressing member 6 is rotatably arranged in the L-shaped grooves 121. In the initial state, the upper part 61 of the L-shaped pressing member 6 is parallel to the insertion part 11, and the lower part 62 of the L-shaped pressing member 6 is perpendicular to the insertion part 11.

[0032] See Figure 9 and Figure 10 The lower part 62 of the L-shape is provided with a slope and / or an arc surface, so that the L-shaped pressing member 6 inserted into the battery cell ear 9 can rotate by continuing to move. The L-shaped pressing member 6 is rotatably disposed in the L-shaped groove 121 by a rotating shaft. A torsion spring is provided on the rotating shaft to elastically reset the L-shaped pressing member 6. In the initial state, the upper part 61 of the L-shape is parallel to the insertion part 11 so that the pressing part 12 can be inserted into the battery cell ear 9. The lower part 62 of the L-shape is perpendicular to the insertion part 11 so that during the insertion of the battery cell ear 9, the battery cell ear 9 pushes the L-shaped pressing member 6 to rotate along the slope of the lower part 62 of the L-shape so that the upper part 61 of the L-shape rotates 90 degrees to press against the end face of the battery cell ear 9.

[0033] Furthermore, in this embodiment, a spring 52 can be used instead of a torsion spring. One end of the spring 52 is connected to the end of the pressing part 12, and the other end is connected to the upper part 61 of the L-shape to realize the automatic reset of the upper part 61 of the L-shape.

[0034] Specifically, there are 3-6 L-shaped pressing parts 6. By setting multiple L-shaped pressing parts 6, the pressing surface with the battery cell ear 9 is increased.

[0035] See Figure 8 The upper end of the sleeve 2 is provided with an annular pressing part 23, and the L-shaped lower part 62 is pressed against the annular pressing part 23 by rotating and descending. Specifically, the vertical cross-section of the annular pressing part 23 is a right-angled trapezoidal structure, and its inclined surface contacts the rotating and descending L-shaped lower part 62, so that the annular pressing part 23 presses the rotated L-shaped lower part 62, so that the L-shaped upper part 61 is kept horizontal and pressed against the battery cell ear 9. Further, the annular pressing part 23 is detachably connected to the end of the sleeve 2. Specifically, the end of the annular pressing part 23 is provided with an external thread, and the end of the sleeve 2 is provided with an internal threaded hole. The annular pressing part 23 is detachably threadedly connected to the internal threaded hole at the end of the sleeve 2 through its external thread.

[0036] Specifically, see Figure 10 The connection between the upper part 61 and the lower part 62 of the L-shape is recessed with a through groove so that the L-shaped pressure piece 6 does not interfere with the thickness direction of the battery cell ear 9 during the movement of the L-shaped pressure piece 6 relative to the battery cell ear 9, so that it can smoothly push the L-shaped pressure piece 6 to rotate at a 90-degree angle.

[0037] See Figure 11 and Figure 12 A limiting spring 7 is provided inside the insert 2. One end of the limiting spring 7 is connected to the limiting ring 13 on the insertion part 11, and the other end is connected to the fixing ring 8 at the inner end of the insert 2. Specifically, the fixing ring 8 is detachably threaded to the end of the insert 2 for easy disassembly. By fixing the limiting spring 7 to the limiting ring 13, the connecting post 1 is fixed inside the insert 2.

[0038] The working principle of this embodiment is as follows: In use, press the U-shaped kit 32 to move the connecting post 1 so that the lower part 62 of the L-shape disengages from the through hole 21 of the insert 2, and the upper part 61 of the L-shape returns to parallel with the connecting post 1 under the force of the torsion spring. At this time, insert the clamping part 12 into the battery cell ear 9 and move it so that the battery cell ear 9 pushes the lower part 62 of the L-shape to rotate, thereby causing the upper part 61 of the L-shape to rotate 90 degrees to press against the end face of the battery cell ear 9, so that the battery cell ear 9 is pressed between the clamping part 12 at the end of the connecting post 1 and the end face of the insert 2. When it is necessary to disassemble the connector, press the pressing member 3 to slide the clamping part 31 in the slot 22, so that the clamping part 31 disengages from the upper end face of the annular tooth 4. Move the connecting post 1 so that the lower part 62 of the L-shape disengages from the battery cell ear 9, and the upper part 61 of the L-shape returns to its original position so that the battery cell ear 9 can disengage from the clamping part 12.

[0039] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any way. Any person skilled in the art can make many possible variations and modifications to the technical solutions of the present invention, or modify them into equivalent embodiments, without departing from the scope of the present invention. Therefore, any modifications, equivalent changes, and alterations made to the above embodiments based on the technology of the present invention without departing from the scope of the present invention are within the protection scope of the present invention.

Claims

1. A connector for battery cell charge / discharge testing, characterized in that, include: The connecting post (1) has a plug-in portion (11) and a clamping portion (12) for clamping the battery cell lug (9). The insert (2) has a through hole (21) for insertion of the insert (11) and a slot (22) that is laterally connected to the through hole (21). The pressing part (3) is sleeved on the insert (2), and one end of it is provided with a locking part (31), which is slidably located in the slot (22); The insertion part (11) is provided with a plurality of annular locking teeth (4) that slide and lock with the locking part (31) along the axial direction.

2. The connector for battery cell charge / discharge testing according to claim 1, characterized in that, The pressing member (3) is provided with a U-shaped kit (32), which is fitted onto the sleeve (2) by an elastic component (5) so that the locking part (31) connected to the end of the U-shaped kit (32) is disengaged from the annular tooth (4) by elastic pressing.

3. The connector for battery cell charge / discharge testing according to claim 2, characterized in that, The elastic component (5) includes a limiting connecting rod (51), a spring (52) and a top plate (53). The U-shaped kit (32) consists of two U-shaped rods. A round hole is provided in the middle of the U-shaped kit (32). The limiting connecting rod (51) passes through the round hole and is connected to the insert (2). The elastic component is sleeved on the limiting connecting rod (51). The top plate (53) is connected to the inner end of the U-shaped kit (32) and is slidably connected to the limiting connecting rod (51). One end of the spring (52) abuts against the top plate (53).

4. The connector for battery cell charge / discharge testing according to claim 2, characterized in that, The elastic component (5) includes a limiting connecting rod (51) and a spring (52). The U-shaped kit (32) is a U-shaped plate. A round hole is provided in the middle of the U-shaped kit (32). The limiting connecting rod (51) passes through the round hole and is connected to the insert (2). The elastic component is sleeved on the limiting connecting rod (51). One end of the spring (52) abuts against the inner end of the U-shaped kit (32).

5. The connector for battery cell charge / discharge testing according to claim 3 or 4, characterized in that, The end of the limiting connecting rod (51) is connected to a limiting piece (54).

6. The connector for battery cell charge / discharge testing according to claim 1, characterized in that, The upper part of the clamping part (31) is an arc-shaped structure, and the bottom surface of the clamping part (31) is a flat structure, so that the annular clamping tooth (4) can be clamped unidirectionally with the bottom surface of the clamping part (31) by inserting into the through hole (21).

7. The connector for battery cell charge / discharge testing according to claim 5, characterized in that, The pressing part (12) is provided with a plurality of L-shaped grooves (121) along the circumferential direction. An L-shaped pressing member (6) is rotatably arranged in the L-shaped groove (121). In the initial state, the upper part (61) of the L-shaped pressing member (6) is parallel to the insertion part (11), and the lower part (62) of the L-shaped pressing member (6) is perpendicular to the insertion part (11). The lower part (62) of the L-shaped pressing member (6) is provided with a slope and / or an arc surface.

8. The connector for battery cell charge / discharge testing according to claim 7, characterized in that, A limiting spring (7) is provided inside the sleeve (2). One end of the limiting spring (7) is connected to the limiting ring (13) on the plug part (11), and the other end is connected to the fixing ring (8) at the inner end of the sleeve (2).

9. The connector for battery cell charge / discharge testing according to claim 7, characterized in that, The L-shaped pressure member (6) is rotatably disposed in the L-shaped groove (121) via a rotating shaft, and a torsion spring is provided on the rotating shaft.

10. The connector for battery cell charge / discharge testing according to claim 7, characterized in that, The upper end of the sleeve (2) is provided with an annular pressing part (23), and the lower L-shaped part (62) presses against the annular pressing part (23) by rotating and descending.

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