Multi-combination type converter for on-line replacement of storage battery

Abstract

The invention relates to the technical field of oil filters, in particular to a multi-combination type converter for online replacement of a storage battery. The invention discloses a multi-combination type converter for on-line replacement of a storage battery. The multi-combination type converter has the beneficial effect of independent weight 1 +.

Description

Technical Field

[0001] The invention relates to the technical field of online replacement of storage battery groups in hydropower stations, in particular to a converter for online replacement of multiple combined storage batteries. Background Art

[0002] In the DC and EPS systems of hydropower stations, battery packs serve as backup power sources. During operation, individual batteries may suffer from serious insufficient capacity assessment, leakage, thermal runaway, corrosion of the connecting bars and bolts of the terminal posts, expansion and deformation of the battery shell, and short circuit of the battery plates. In the conventional series battery pack design, the replacement of a damaged single battery or battery pack requires power outage for offline replacement, which greatly increases the workload of maintenance personnel and also brings great hidden dangers and unstable factors to the safe and stable operation of the system. At the same time, during the overall online replacement, the terminal posts need to be frequently connected and disconnected with the DC-DC converter. Therefore, in the large-scale maintenance and replacement of battery packs in hydropower stations, it is necessary to further simplify the repetitive connection work in order to improve the replacement efficiency of the staff. Summary of the invention

[0003] The purpose of this section is to summarize some aspects of embodiments of the present invention and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and the invention title of this application to avoid blurring the purpose of this section, the specification abstract and the invention title, and such simplifications or omissions cannot be used to limit the scope of the present invention.

[0004] In view of the above and / or existing problems in online replacement of battery packs in existing hydropower stations, the present invention is proposed.

[0005] Therefore, the problem to be solved by the present invention is how to quickly replace the battery pack.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a multi-combination battery online replacement converter, which includes a converter, the converter includes a top cover, a base and a terminal, the top cover is arranged on the upper part of the base, and the terminal is arranged on the side of the base; an extension unit, the extension unit includes a fixing part, a pull-out part and a pull-back part, the fixing part is arranged at the end of the terminal, the pull-out part is slidably matched with the fixing part, and the pull-back part is movably matched with the pull-out part.

[0007] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the terminal comprises a threaded ring arranged at its end, and a contact head is arranged inside the threaded ring.

[0008] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the pull-back member is fitted onto the end of the external terminal.

[0009] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the fixing part includes a contact rod, the contact rod is arranged inside the fixing part, the contact rod includes an electrical head and an electrical cavity, the electrical head and the electrical cavity are respectively arranged at both ends of the contact rod, and the electrical cavity is arranged on one side of the terminal.

[0010] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the fixing part further comprises a terminal cavity, the terminal cavity is arranged on one side of the electrical head, the terminal cavity comprises a limiting ring, and the limiting ring is arranged on the outer circle of the terminal cavity.

[0011] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the limiting ring includes a trapezoidal ring and an arcuate ring, both of which are arranged on the side of the limiting ring, and the trapezoidal ring is close to the terminal cavity insertion port.

[0012] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the fixing member further includes a sliding cavity, the sliding cavity is arranged outside the terminal cavity, a threaded hole is arranged at the bottom of the sliding cavity, and sliders are symmetrically arranged on both sides of the sliding cavity.

[0013] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the pull-out piece includes a groove 1, a blocking ring and a spring, the groove 1 is arranged at the end of the pull-out piece, the blocking ring and the spring are arranged on the side of the limit ring, the inner side of the groove 1 is provided with a transition cavity, the outer side of the groove 1 is provided with a bite slip ring, the bite slip ring is fixedly connected to the groove 1, and an L-shaped slide is arranged on the outside of the pull-out piece, and the L-shaped slide is arranged on both sides of the outside of the pull-out piece.

[0014] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the pull-back member is engaged with the pull-out member, and the pull-back member includes a terminal cavity, a second groove and a locking piece, the second groove is arranged on the side of the terminal cavity, and the locking piece is arranged on the other side of the terminal cavity.

[0015] As a preferred solution of the converter for online replacement of multiple-combination batteries described in the present invention, the locking piece includes a bite portion and a fork portion, the bite portion is arranged on the side of the locking piece, the fork portion is arranged between the two locking pieces, and a bite ring is arranged at the end of the bite portion.

[0016] The beneficial effects of the present invention are as follows: when continuously replacing battery packs, it is necessary to frequently perform plug-in and unplug electrical connection operations on the terminal and the converter. In order to make the connection stable, a threaded structure is often added to the end of the terminal to facilitate its fixation. However, in a large number of replacement work, this fixation often limits the work efficiency of workers. The pull-back member of the present invention can directly connect the terminal with the converter under the pulling effect of the pull-out member, and there is no need to continue to lock it. At the same time, the rotation of the pull-out member and the engagement with the fixing member can further fix the stability of the terminal. When the terminal needs to be unplugged, it is only necessary to twist the pull-out member to pull the terminal out forcefully, which saves the wiring time of the staff and improves efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0018] Figure 1 This is a circuit diagram for online replacement of multiple combined batteries.

[0019] Figure 2 This is a schematic diagram of the operation of online replacement of multiple combined batteries.

[0020] Figure 3 This is the front view of the converter for online replacement of multiple-combination batteries.

[0021] Figure 4 This is a schematic diagram of a converter extension unit for online replacement of multiple combined batteries.

[0022] Figure 5 This is a schematic diagram of the converter extension unit pull-back component and terminal assembly for online replacement of multiple-combination batteries.

[0023] Figure 6 This is a schematic diagram of the converter extension unit combination for online replacement of multiple-combination batteries.

[0024] Figure 7 This is an exploded view of the converter extension unit for online replacement of multiple combined batteries.

[0025] Figure 8 Surface plan view of a converter extension unit for online replacement of multiple combined batteries. DETAILED DESCRIPTION

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0028] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0029] Example 1

[0030] Reference Figure 1 to Figure 4 , which is the first embodiment of the present invention, provides a multi-combination battery online replacement converter, including a converter 100 and an extension unit 200. The converter 100 includes a top cover 101, a base 102 and a terminal 103. The top cover 101 is arranged on the upper part of the base 102, and the terminal 103 is arranged on the side of the base 102; the extension unit 200 includes a fixing member 201, a pull-out member 202 and a pull-back member 203. The fixing member 201 is arranged at the end of the terminal 103, the pull-out member 202 is slidably matched with the fixing member 201, and the pull-back member 203 is movably matched with the pull-out member 202.

[0031] Furthermore, the terminal 103 at the end of the converter 100 is fixedly connected to the extension unit 200, the external terminal is movably engaged with the pull-back member 203 of the extension unit 200, the pull-back member 203 is sleeved on the external terminal, the fixing member 201 of the extension unit 200 is fixedly connected to the terminal 103, the pull-out member 202 is movably engaged with the fixing member 201, and the pull-out member 202 slides inside the fixing member 201.

[0032] When in use, first tighten the fixing part 201 onto the terminal post 103, then insert the external terminal into the pull-back part 203, and insert the end of the pull-back part 203 into the cavity of the drawer 202. Use the pulling action of the drawer 202 to pull the pull-back part 203 so that the terminal goes deep into the drawer 202 and is electrically connected to the fixing part 201. At the same time, rotate the drawer 202 to lock it. When the terminal needs to be unplugged, just rotate the drawer 202 in the opposite direction to unlock the drawer 202 and restore it to a sliding state. At the same time, pull the pull-back part 203 that is engaged with the terminal to disconnect the terminal from the connected state, which simplifies the wiring and disconnection operations.

[0033] Example 2

[0034] Reference Figure 3 to Figure 6 , which is the second embodiment of the present invention, is different from the first embodiment in that this embodiment provides a multi-combination battery online replacement converter including: the terminal 103 includes a threaded ring 103a arranged at its end, and a contact head 103a-1 is arranged inside the threaded ring 103a.

[0035] Furthermore, the pullback member 203 is clamped on the end of the external terminal, and the fixing member 201 includes a contact rod 201a, which is arranged inside the fixing member 201, and the contact rod 201a includes an electrical head 201a-1 and an electrical cavity 201a-2, and the electrical head 201a-1 and the electrical cavity 201a-2 are respectively arranged at both ends of the contact rod 201a, and the electrical cavity 201a-2 is arranged on one side of the terminal 103.

[0036] Preferably, the fixing member 201 also includes a terminal cavity 201b, which is arranged on one side of the electrical head 201a-1. The terminal cavity 201b includes a limiting ring 201b-1, which is arranged on the outer ring of the terminal cavity 201b. The limiting ring 201b-1 includes a trapezoidal ring 201b-11 and an arc ring 201b-12. The trapezoidal ring 201b-11 and the arc ring 201b-12 are both arranged on the side of the limiting ring 201b-1, and the trapezoidal ring 201b-11 is close to the insertion port of the terminal cavity 201b.

[0037] Preferably, the fixing member 201 further comprises a sliding cavity 201c, which is arranged outside the terminal cavity 201b, a threaded hole 201c-1 is arranged at the bottom of the sliding cavity 201c, and sliding blocks 201c-2 are symmetrically arranged on both sides of the sliding cavity 201c.

[0038] Furthermore, the pull-out member 202 includes a groove 202a, a blocking ring 202b and a spring 202c, the groove 202a is arranged at the end of the pull-out member 202, the blocking ring 202b and the spring 202c are arranged on the side of the limit ring 201b-1, a transition cavity 202a-1 is arranged on the inner side of the groove 202a, a bite slip ring 202a-11 is arranged on the outer side of the groove 202a, the bite slip ring 202a-11 is fixedly connected to the groove 202a, and an L-shaped slide 202b-1 is arranged on the outside of the pull-out member 202, and the L-shaped slide 202b-1 is arranged on both sides of the outside of the pull-out member 202.

[0039] Specifically, the threaded ring 103a is fixedly connected to the threaded hole 201c-1, the contact head 103a-1 penetrates into the electrical cavity 201a-2 to electrically connect the fixing member 201 and the terminal 103, the contact rod 201a is electrically connected to the external terminal, and an L-shaped slide 202b-1 is arranged on the outside of the pull-out member 202, which slides with the slider 201c-2. The L-shaped slide 202b-1 is divided into a long side slide and a short side slide. When the slider 201c-2 slides along the long side slide, the pull-out member 202 is pulled outward or retracted inward, and the short side slide and the slider 201c-2 enable the pull-out member 202 to complete the locking and positioning, and the sliding cavity 201c slides with the blocking ring 202b and the spring 202c, so that the pull-out member 202 will not separate from the fixing member 201.

[0040] Example 3

[0041] Reference Figure 3 to Figure 8 , which is the third embodiment of the present invention. This embodiment is different from the previous two embodiments in that this embodiment provides a multi-combination battery online replacement converter including a pull-back member 203 and a pull-out member 202 that are engaged with each other, the pull-back member 203 includes a terminal card cavity 203a, a second groove 203b and a snap-fit ​​piece 203c, the second groove 203b is arranged on the side of the terminal card cavity 203a, the snap-fit ​​piece 203c is arranged on the other side of the terminal card cavity 203a, the snap-fit ​​piece 203c includes a snap-fit ​​portion 203c-1 and a fork portion 203c-2, the snap-fit ​​portion 203c-1 is arranged on the side of the snap-fit ​​piece 203c, the fork portion 203c-2 is arranged between the two snap-fit ​​pieces 203c, and a snap-fit ​​ring 203c-11 is arranged at the end of the snap-fit ​​portion 203c-1.

[0042] In combination with the previous embodiment, the fixing member 201 also includes a terminal cavity 201b, which is arranged on one side of the electrical head 201a-1. The terminal cavity 201b includes a limiting ring 201b-1, which is arranged on the outer ring of the terminal cavity 201b. The limiting ring 201b-1 includes a trapezoidal ring 201b-11 and an arc ring 201b-12. The trapezoidal ring 201b-11 and the arc ring 201b-12 are both arranged on the side of the limiting ring 201b-1, and the trapezoidal ring 201b-11 is close to the insertion port of the terminal cavity 201b.

[0043] Preferably, the fixing member 201 further comprises a sliding cavity 201c, which is arranged outside the terminal cavity 201b, a threaded hole 201c-1 is arranged at the bottom of the sliding cavity 201c, and sliding blocks 201c-2 are symmetrically arranged on both sides of the sliding cavity 201c.

[0044] Furthermore, the pull-out member 202 includes a groove 202a, a blocking ring 202b and a spring 202c, the groove 202a is arranged at the end of the pull-out member 202, the blocking ring 202b and the spring 202c are arranged on the side of the limit ring 201b-1, a transition cavity 202a-1 is arranged on the inner side of the groove 202a, a bite slip ring 202a-11 is arranged on the outer side of the groove 202a, the bite slip ring 202a-11 is fixedly connected to the groove 202a, and an L-shaped slide 202b-1 is arranged on the outside of the pull-out member 202, and the L-shaped slide 202b-1 is arranged on both sides of the outside of the pull-out member 202.

[0045] When in use, first pull the drawer 202 out of the fixing member 201 along the long side slide of the L-shaped slide 202b-1, so that a hollow portion appears inside the drawer 202, and then bend the engaging piece 203c of the pull-back member 203 axially toward the pull-back member 203, so that the bite ring 203c-11 at the end of the pull-back member 203 is inserted into the transition cavity 202a-1 of the drawer 202, and the bite slip ring 202a-11 is in bite contact with the bite ring 203c-11. Release the hand holding the drawer 202 to reset the drawer 202 under the action of the spring 202c, so that the bite slip ring 202a-11 pulls the bite ring 203c-11 to move toward the inner cavity of the drawer 202. When the bite ring 203c-11 moves to the outside of the terminal cavity 201b, it engages with the trapezoidal ring 202 01b-11 and the arc ring 201b-12 gradually contact. First, the trapezoidal ring 201b-11 causes the bite part 203c-1 to be subjected to an outward expansion force, causing the locking piece 203c to open outward, so that the bite ring 203c-11 is further in contact with the terminal cavity 201b, and continues to move and contact with the arc ring 201b-12. The inner wall of the terminal cavity 201b gives the bite ring 203c-11 a reverse force, causing the bite ring 203c-11 to slightly bend toward the arc ring 201b-12, making the bite tighter. At the same time, rotate the pull-out member 202 so that its short side slide is limited by the slider 201c-2 to complete the connection and fixation of the terminal. After completing the work, you only need to rotate the pull-out member 202 to unlock it and then pull out the terminal with force.

[0046] Example 4

[0047] Reference Figure 1-2 , which is the fourth embodiment of the present invention. This embodiment provides a method for online replacement of a multi-combination battery pack. Specifically, the model specification and battery brand parameters of the battery (group) 2 to be replaced are first determined, and the operation mode of the DC system battery pack in a floating charge state is confirmed. The spare battery (group) 14 with the same model specification and brand as the battery (group) 2 to be replaced is connected through nodes 13 and 15, and is securely fixed by an adjustable caliper. The new battery (group) to be installed is float charged for 72 hours before use to balance the internal power.

[0048] Furthermore, a black crocodile clip is connected to the positive electrode of the battery (group) 3 adjacent to the battery (group) 2 to be replaced, and a yellow crocodile clip is connected to the positive electrode of the battery (group) 2 to be replaced. The main display screen 8 displays the voltage of the battery (group) 2 to be replaced at this time, and the green jumper indicator light 11 lights up, indicating that the wiring polarity is correct; at this time, the position of the black crocodile clip remains unchanged, the yellow crocodile clip is removed and fixed to the negative electrode of the battery (group) 1 adjacent to the battery (group) 2 to be replaced with a red crocodile clip. When the rated voltage of the single battery 2 to be replaced is 2V, the upper limit voltage allowed to be output by the voltage comparator 9 is set to 2.28V and the lower limit voltage is set to 2.23V on the main display screen 8. For two batteries, the upper and lower limits of the output voltage are allowed to be multiplied by 2, that is, the upper limit voltage is set to 4.46V, the lower limit voltage is set to 4.56V, and so on; appropriately fine-tune the output control button 10, and when the output voltage is within the setting range of the voltage comparator 9, the red indicator light 12 lights up and remains on; close the switch control button 6, remove the battery (group) 2 to be replaced, replace it with a new battery (group) that has been float charged for 72 hours, restore the battery connection strips 4 and 5, remove the red crocodile clip, and use the yellow crocodile clip to connect to the positive electrode of the new battery (group), the screen displays the voltage of the new battery, and the faulty battery (group) is replaced online.

[0049] In summary, a DC-DC converter is used to prevent the formation of circulating current due to the voltage difference between batteries; the use of a voltage comparator and control by the main display screen can realize online replacement of a single battery or multiple battery groups, while the system voltage remains basically unchanged; the installation of jumper red and green indicator lights facilitates intuitive observation of whether the battery (group) to be replaced meets the replacement conditions; the setting of a detachable node can replace batteries (groups) of different models, specifications and brands in the device to ensure safe and reliable replacement.

[0050] When replacing battery packs continuously, it is necessary to frequently perform plug-in and unplug operations on the wiring terminals and the converter. In order to stabilize the connection, a threaded structure is often added to the end of the terminal to facilitate its fixation. However, in a large number of replacement operations, this fixation often limits the work efficiency of workers. The pull-back member of the present invention can directly connect the wiring terminals to the converter under the pulling effect of the pull-out member, and there is no need to continue to lock it. At the same time, the rotating pull-out member and the fixing member can further fix the stability of the wiring terminals. When the wiring terminals need to be unplugged, only the pull-out member needs to be twisted to pull the terminals out forcefully, which saves the wiring time of the workers and improves efficiency.

[0051] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A multi-combination battery online replacement converter, characterized in that: include, A converter (100), the converter (100) comprising a top cover (101), a base (102) and a terminal (103), the top cover (101) being arranged on the upper part of the base (102), and the terminal (103) being arranged on the side of the base (102); as well as, An extension unit (200) comprises a fixing member (201), a drawer member (202) and a pull-back member (203), wherein the fixing member (201) is arranged at the end of a terminal post (103), the drawer member (202) is slidably matched with the fixing member (201), and the pull-back member (203) is movably matched with the drawer member (202).

2. The multi-combination battery online replacement converter as claimed in claim 1, characterized in that: The terminal (103) comprises a threaded ring (103a) arranged at an end thereof, and a contact head (103a-1) is arranged inside the threaded ring (103a).

3. The multi-combination battery online replacement converter according to claim 1 or 2, characterized in that: The pull-back member (203) is sleeved and clamped on the end of the external connection terminal.

4. The multi-combination battery online replacement converter according to any one of claims 1, 2 or 4, characterized in that: The fixing member (201) comprises a contact rod (201a), the contact rod (201a) is arranged inside the fixing member (201), the contact rod (201a) comprises an electrical head (201a-1) and an electrical cavity (201a-2), the electrical head (201a-1) and the electrical cavity (201a-2) are respectively arranged at two ends of the contact rod (201a), and the electrical cavity (201a-2) is arranged on one side of the terminal (103).

5. The multi-combination battery online replacement converter as claimed in claim 4, characterized in that: The fixing member (201) further comprises a terminal cavity (201b), wherein the terminal cavity (201b) is arranged on one side of the electrical head (201a-1), and the terminal cavity (201b) comprises a limiting ring (201b-1), wherein the limiting ring (201b-1) is arranged on the outer ring of the terminal cavity (201b).

6. The multi-combination battery online replacement converter as claimed in claim 5, characterized in that: The limiting ring (201b-1) comprises a trapezoidal ring (201b-11) and an arcuate ring (201b-12); the trapezoidal ring (201b-11) and the arcuate ring (201b-12) are both arranged on the side of the limiting ring (201b-1); the trapezoidal ring (201b-11) is close to the insertion port of the terminal cavity (201b).

7. The multi-combination battery online replacement converter as claimed in claim 6, characterized in that: The fixing member (201) further comprises a sliding cavity (201c), wherein the sliding cavity (201c) is arranged outside the terminal cavity (201b), a threaded hole (201c-1) is arranged at the bottom of the sliding cavity (201c), and sliding blocks (201c-2) are symmetrically arranged on both sides of the sliding cavity (201c).

8. The multi-combination battery online replacement converter as claimed in claim 7, characterized in that: The drawer (202) comprises a groove (202a), a blocking ring (202b) and a spring (202c); the groove (202a) is arranged at the end of the drawer (202); the blocking ring (202b) and the spring (202c) are arranged on the side of the limit ring (201b-1); a transition cavity (202a-1) is arranged on the inner side of the groove (202a); a bite slip ring (202a-11) is arranged on the outer side of the groove (202a); the bite slip ring (202a-11) is fixedly connected to the groove (202a); an L-shaped slideway (202b-1) is arranged on the outside of the drawer (202); and the L-shaped slideway (202b-1) is arranged on both sides of the outside of the drawer (202).

9. The multi-combination battery online replacement converter according to any one of claims 6 to 8, characterized in that: The pull-back member (203) is engaged with the draw-out member (202), and the pull-back member (203) comprises a terminal clamping cavity (203a), a second groove (203b) and a clamping piece (203c), wherein the second groove (203b) is arranged on the side of the terminal clamping cavity (203a), and the clamping piece (203c) is arranged on the other side of the terminal clamping cavity (203a).

10. The multi-combination battery online replacement converter as claimed in claim 9, characterized in that: The engaging piece (203c) comprises a bite portion (203c-1) and a fork portion (203c-2), wherein the bite portion (203c-1) is arranged on the side of the engaging piece (203c), the fork portion (203c-2) is arranged between two engaging pieces (203c), and a bite ring (203c-11) is arranged at the end of the bite portion (203c-1).

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