Safety device for a direct current storage battery

Abstract

The utility model discloses a kind of safety devices for direct current storage battery, it is related to storage battery technical field, including safety seat and the safety tube being installed on safety seat, the safety seat includes outer thread pipe, and the spigot pipe being inserted in outer thread pipe, multiple limit rods are evenly arranged on the inner ring surface of outer thread pipe along circumference, electrically conductive sheet I is fixedly installed on electrically conductive sheet I, connection line I is fixedly installed in another end of connection line I, and wire snout I is fixedly installed;Multiple chutes are evenly set on the outer ring surface of spigot pipe along circumference, limit rod and chute are one-to-one correspondence, threaded pipe is rotatably sleeved on the outside of spigot pipe, and inner thread pipe is threadedly connected with outer thread pipe.The safety device for direct current storage battery, the device is converted into linear motion by the circumferential limiting structure of limit rod and chute, thoroughly eliminates the fatigue fracture hidden danger generated by torsion of connection line, and prolongs the service life of device.

Description

Technical Field

[0001] This utility model relates to the field of battery technology, specifically a fuse device for DC batteries. Background Technology

[0002] Existing fuse mounting brackets generally adopt a double-helix mating fuse case structure. The core defect is that during the tightening process, the relative rotation of the fuse case will directly transmit the torque to the internal wiring and solder joints, causing the wires to be pulled and the solder joints to break, resulting in permanent structural damage, which in turn leads to circuit interruption and the inability to collect voltage.

[0003] Therefore, it is necessary to propose a fuse for DC batteries to solve the above problems. Utility Model Content

[0004] Technical problem to be solved: The purpose of this utility model is to provide a fuse device for DC batteries to solve the problem mentioned in the background art that the existing double-helix mating fuse housing structure will directly transmit torque to the internal wiring and solder joints during the tightening process, causing wire pulling and solder joint cracking, resulting in permanent structural damage, and thus causing circuit interruption and inability to collect voltage.

[0005] Technical Solution: To achieve the above objectives, this utility model provides the following technical solution: A fuse device for a DC storage battery includes a fuse holder and a fuse tube installed on the fuse holder. The fuse holder includes an externally threaded tube and a insert tube inserted into the externally threaded tube. Multiple limiting rods are evenly distributed along the circumference of the inner ring surface of the externally threaded tube. A conductive sheet I is concentrically fixedly installed inside the externally threaded tube. A connecting wire I is fixedly installed on the conductive sheet I, and a wire lug I is fixedly installed at the other end of the connecting wire I. Multiple sliding grooves are evenly distributed along the circumference of the outer ring surface of the insert tube. The limiting rods correspond one-to-one with the sliding grooves. An internally threaded tube is rotatably fitted onto the outside of the insert tube. The internally threaded tube is threadedly connected to the externally threaded tube. A conductive sheet II is concentrically fixedly installed inside the insert tube. A connecting wire II is fixedly installed on the conductive sheet II, and a wire lug II is fixedly installed at the other end of the connecting wire II. The fuse tube is located within the cavity formed by the externally threaded tube and the insert tube, and both ends of the fuse tube abut against the conductive sheet I and the conductive sheet II, respectively.

[0006] Preferably, a stop is fixedly installed on the outside of the externally threaded pipe near the end of the connecting line I, and the outer diameter of the stop is the same as the outer diameter of the internally threaded pipe.

[0007] Preferably, the external fixed sleeve of the insertion tube is provided with a boss, the internal threaded tube is movably sleeved on the outside of the boss, and the inner side of the internal threaded tube near the end of the connecting line II is fixedly sleeved with a ring, and the inner diameter of the ring is smaller than the outer diameter of the boss.

[0008] Preferably, the external threaded tube, the stop, the limiting rod, the conductive sheet I, the connecting wire I, and the wire lug I are integrally injection molded, and the insert, the groove, the boss, the conductive sheet II, the connecting wire II, and the wire lug II are integrally injection molded.

[0009] Preferably, sealing rings are fixedly installed at the ends of connecting wire I and connecting wire II that are far apart from each other. Wire lug I and wire lug II are respectively fixedly installed inside the two sealing rings. A connecting piece is fixedly installed on the outer ring surface of the sealing rings, and a waterproof cap is fixedly installed at the other end of the connecting piece.

[0010] Preferably, the waterproof cover includes an inner ring, an outer ring, and a top plate, and the outer diameter of the inner ring is the same as the inner diameter of the sealing ring, and the inner diameter of the outer ring is the same as the outer diameter of the sealing ring.

[0011] Beneficial effects: Compared with the prior art, this utility model provides a fuse device for DC batteries. This fuse device for DC batteries has a unique structure and is easy to use. The external threaded tube is equipped with a limiting rod, and the insertion tube is equipped with a corresponding sliding groove. After the two are inserted, they form a circumferential limiting structure. When the internal threaded tube is rotated, its threaded engagement with the external threaded tube is converted into an axial driving force, pushing the external threaded tube and the insertion tube to move towards each other, so that the two ends of the fuse tube are in close contact with conductive sheet I and conductive sheet II, respectively. During this process, the engagement of the limiting rod and the sliding groove effectively avoids the torsional stress generated by the rotation of the conductive sheet and the connecting wire, while the self-locking characteristic of the thread structure ensures the stability of the contact pressure. In embodiment 2, the sealing ring and the waterproof cap form a physical barrier by sleeved onto the terminal post and covering the connection of the wire lug, preventing moisture from entering.

[0012] This device converts rotational motion into linear motion through a circumferential limiting structure of a limiting rod and a sliding groove, completely eliminating the risk of fatigue fracture caused by torsion of the connecting wire and extending the service life of the device. In addition, by placing the fuse in the cavity formed by the external threaded tube and the insertion tube, combined with the double protection formed by the sealing ring and the waterproof cover, the sealing ring sleeves the terminal post to achieve radial sealing, and the waterproof cover covers the connection area to provide axial protection, effectively coping with the high humidity environment commonly encountered by battery packs. Attached Figure Description

[0013] Figure 1 This is a three-dimensional schematic diagram of the structure of this utility model; Figure 2 This is a three-dimensional schematic diagram of the cannula structure of this utility model; Figure 3 This is a cross-sectional schematic diagram of the structure of this utility model; Figure 4 This is a three-dimensional schematic diagram of the waterproof cover structure of this utility model.

[0014] In the diagram: 1. External threaded tube; 2. Stop; 3. Limiting rod; 4. Conductive plate I; 5. Connecting wire I; 6. Wire lug I; 7. Insert tube; 8. Slide groove; 9. Boss; 10. Internal threaded tube; 11. Conductive plate II; 12. Connecting wire II; 13. Wire lug II; 14. Sealing ring; 15. Waterproof cover; 16. Connecting piece. Detailed Implementation

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0016] Example 1: This Example 1 provides a fuse device for DC batteries, which is a direct improvement on existing battery fuse devices. It features a unique structure. Please refer to [link / reference]. Figure 1-3 As shown, the device includes a safety seat and a safety tube mounted on the safety seat. The safety seat includes an externally threaded tube 1 and a insertion tube 7 inserted into the externally threaded tube 1. Multiple limiting rods 3 are evenly arranged along the circumference on the inner ring surface of the externally threaded tube 1. A conductive sheet I4 is concentrically fixedly installed inside the externally threaded tube 1. A connecting wire I5 ​​is fixedly installed on the conductive sheet I4. A wire lug I6 is fixedly installed at the other end of the connecting wire I5. Multiple sliding grooves 8 are evenly opened along the circumference on the outer ring surface of the insertion tube 7. The limiting rods 3 correspond one-to-one with the sliding grooves 8. An internally threaded tube 10 is rotatably fitted outside the insertion tube 7. The internally threaded tube 10 is threadedly connected to the externally threaded tube 1. A conductive sheet II11 is concentrically fixedly installed inside the insertion tube 7. A connecting wire II12 is fixedly installed on the conductive sheet II11. A wire lug II13 is fixedly installed at the other end of the connecting wire II12. The safety tube is located in the cavity formed by the externally threaded tube 1 and the insertion tube 7, and both ends of the safety tube abut against the conductive sheet I4 and the conductive sheet II11, respectively.

[0017] A stop 2 is fixedly installed on the outside of the external threaded tube 1 near the end of the connecting line I5. The outer diameter of the stop 2 is the same as the outer diameter of the internal threaded tube 10. A boss 9 is fixedly fitted on the outside of the insertion tube 7. The internal threaded tube 10 is movably fitted on the outside of the boss 9. A ring is fixedly fitted on the inside of the end of the internal threaded tube 10 near the connecting line II12. The inner diameter of the ring is smaller than the outer diameter of the boss 9. The external threaded tube 1, the stop 2, the limiting rod 3, the conductive sheet I4, the connecting line I5, and the wire lug I6 are integrally injection molded. The insertion tube 7, the slide 8, the boss 9, the conductive sheet II11, the connecting line II12, and the wire lug II13 are integrally injection molded to improve the stability of the connection.

[0018] Working principle: When using this device, first insert the fuse tube, then insert the insertion tube 7 into the external threaded tube 1, and make the limiting rod 3 and the sliding groove 8 correspond one-to-one. At this time, rotate the internal threaded tube 10. Through the threaded connection between the internal threaded tube 10 and the external threaded tube 1, drive the external threaded tube 1 and the insertion tube 7 to move towards each other, thereby avoiding the torsion between the conductive piece I4 and the connecting wire I5, and between the conductive piece II11 and the connecting wire II12, and extending the service life of the fuse device until both ends of the fuse tube are in close contact with the conductive piece I4 and the conductive piece II11 respectively. Then, connect the fuse device in series between two adjacent battery cells of the storage battery.

[0019] Example 2: The difference between Example 2 and Example 1 is as follows: Figure 4 As shown, sealing rings 14 are fixedly installed at the ends of connecting wires I5 and II12 that are far apart from each other. Wire lugs I6 and II13 are respectively fixedly installed inside the two sealing rings 14. A connecting piece 16 is fixedly installed on the outer ring surface of the sealing ring 14, and a waterproof cover 15 is fixedly installed at the other end of the connecting piece 16. The waterproof cover 15 includes an inner ring, an outer ring, and a top plate. The outer diameter of the inner ring is the same as the inner diameter of the sealing ring 14, and the inner diameter of the outer ring is the same as the outer diameter of the sealing ring 14. By setting the sealing rings 14 and the waterproof cover 15 on the outside of the wire lugs I6 and II13, during installation, the sealing rings 14 are first placed on the outside of the battery cell terminals, and then the wire lugs I6 and II13 are fixed to the corresponding terminals with screws. Finally, the waterproof cover 15 is placed on the top of the sealing rings 14. This design further improves the waterproof performance of the safety device.

[0020] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fuse device for a DC storage battery, comprising a fuse holder and a fuse tube mounted on the fuse holder, characterized in that: The safety seat includes an externally threaded tube (1) and a insert (7) inserted into the externally threaded tube (1). Multiple limiting rods (3) are evenly arranged along the circumference on the inner ring surface of the externally threaded tube (1). A conductive sheet I (4) is concentrically fixed inside the externally threaded tube (1). A connecting wire I (5) is fixedly installed on the conductive sheet I (4), and a wire lug I (6) is fixedly installed at the other end of the connecting wire I (5). Multiple sliding grooves (8) are evenly opened along the circumference on the outer ring surface of the insert (7). The limiting rods (3) and the sliding grooves (8) are arranged one-to-one. Correspondingly, the external rotating sleeve of the insertion tube (7) is fitted with an internal threaded tube (10), which is threadedly connected to the external threaded tube (1). A conductive plate II (11) is concentrically fixed inside the insertion tube (7), and a connecting wire II (12) is fixedly installed on the conductive plate II (11). A wire lug II (13) is fixedly installed at the other end of the connecting wire II (12). The fuse is located in the cavity formed by the external threaded tube (1) and the insertion tube (7), and the two ends of the fuse are in contact with the conductive plate I (4) and the conductive plate II (11) respectively.

2. The fuse device for a DC battery according to claim 1, characterized in that: The external threaded pipe (1) is fixedly installed with a stop (2) at one end near the connecting line I (5). The outer diameter of the stop (2) is the same as the outer diameter of the internal threaded pipe (10).

3. A fuse device for a DC battery according to claim 1, characterized in that: The external fixed sleeve of the insertion tube (7) is provided with a boss (9), and the internal thread tube (10) is movably sleeved on the outside of the boss (9). The inner side of the internal thread tube (10) near the end of the connecting line II (12) is fixedly sleeved with a ring platform, and the inner diameter of the ring platform is smaller than the outer diameter of the boss (9).

4. A fuse device for a DC storage battery according to claim 3, characterized in that: The external threaded tube (1), the stop (2), the limiting rod (3), the conductive sheet I (4), the connecting line I (5), and the wire lug I (6) are integrally injection molded. The insert (7), the slide (8), the boss (9), the conductive sheet II (11), the connecting line II (12), and the wire lug II (13) are integrally injection molded.

5. A fuse device for a DC storage battery according to claim 1, characterized in that: The ends of connecting line I (5) and connecting line II (12) that are far apart from each other are fixedly installed with sealing rings (14). Line lugs I (6) and line lugs II (13) are fixedly installed in the two sealing rings (14). A connecting piece (16) is fixedly installed on the outer ring surface of the sealing ring (14). A waterproof cap (15) is fixedly installed on the other end of the connecting piece (16).

6. A fuse device for a DC storage battery according to claim 5, characterized in that: The waterproof cover (15) includes an inner ring, an outer ring and a top plate, and the outer diameter of the inner ring is the same as the inner diameter of the sealing ring (14), and the inner diameter of the outer ring is the same as the outer diameter of the sealing ring (14).

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