A method of rapid replacement of a lead-acid battery unit

Abstract

The present application relates to the technical field of direct current power supply, in particular to a kind of lead-acid battery unit quick replacement method.It includes the following steps: rotating and opening the cabinet door of quick replacement device to expose the inside of cabinet, observe the degree of damage and the degree of leakage of lead-acid battery shell in the insert frame through front panel;Rotating rotating wheel drives insert shaft to separate from slide way through hanging plate, and according to the degree of damage and the degree of leakage of lead-acid battery shell control the movement of insert frame;Wearing anti-static suit disconnects the cable of insert frame and connects the liquid collecting device after leakage canal, then completely pull out the insert frame;After laying down and opening the frame cover, remove the fixing bolt, take out the lead-acid battery from the placing groove and replace it.In the present application, lead-acid battery is observed through front panel, so that insert frame containing lead-acid battery can be treated differently, electrolyte in insert frame is removed, and lead-acid battery is removed from insert frame, so that quick replacement of lead-acid battery unit can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current power supply, in particular to a method for quickly replacing a lead-acid battery unit. Background Art

[0002] Lead-acid batteries generally refer to acid batteries. All batteries that use an acidic aqueous solution as the electrolyte are collectively called acid batteries. Traditional DC systems connect batteries in series, which has a low safety factor during initial installation or regular maintenance. In addition, since the voltage increases with the series connection when the battery is first installed, the probability of accidental injury to people is higher.

[0003] For example, CN213857529U involves a quick installation device for welding lead-acid batteries. The device has two sets of product positioning blocks and a set of partitions on a support plate. The partitions are installed on the support plate using brackets. The partitions are detachable and can be directly snapped into the brackets. In this way, partitions of corresponding heights can be installed according to actual conditions. The two sets of product positioning blocks can facilitate the turnover installation and disassembly of the products, improve the welding efficiency of the products, and at the same time, the setting of the partitions prevents welding slag from causing harm to the operators and reduces safety hazards. However, the welding installation method is not convenient for subsequent replacement of the batteries. In addition, due to the high voltage of the battery and the static electricity generated by the operator himself during the welding operation, it is easy to cause a short circuit in the battery and injure people.

[0004] Therefore, a method for quickly replacing lead-acid battery cells is proposed, which is convenient for replacement and avoids battery short circuit. Summary of the Invention

[0005] The object of the present invention is to provide a method for quickly replacing lead-acid battery cells to solve the problems raised in the above background technology.

[0006] To achieve the above object, the present invention provides a method for quickly replacing a lead-acid battery cell, comprising the following steps:

[0007] S1. Open the door of the quick-change unit to expose the interior of the cabinet. Observe the damage and leakage of the lead-acid battery casing inside the frame through the front panel.

[0008] S2. Rotate the rotary wheel to drive the plug-in shaft out of the slideway through the hanging plate, and control the movement of the plug-in frame according to the damage degree of the lead-acid battery shell and the degree of leakage;

[0009] S3. Wear anti-static clothing, disconnect the cables connected to the subrack, connect the liquid collection device to the drain tank, and completely pull out the subrack.

[0010] S4. Lay the frame flat, open the frame cover, remove the fixing bolts, take out the lead-acid battery from the slot and replace it.

[0011] As a further improvement of the present technical solution, in said S1, the degree of damage to the shell of the lead-acid battery includes the following three levels, namely:

[0012] Level 1: damage degree is less than or equal to 0.03, and the lead-acid battery shell is intact;

[0013] Level 2: The damage degree is greater than 0.03 and less than 0.20, and the lead-acid battery shell is damaged;

[0014] Level 3: damage degree is greater than or equal to 0.20, and the lead-acid battery casing is damaged.

[0015] As a further improvement of the present technical solution, the calculation formula for the shell damage degree is damage degree = shell damage area / shell total area.

[0016] As a further improvement of the present technical solution, in said S1, the leakage degree of the lead-acid battery includes the following three degrees, namely:

[0017] Level 1: There is no electrolyte in the drain tank and no leakage from the lead-acid battery;

[0018] Level 2: There is some electrolyte in the discharge tank, and the lead-acid battery is leaking;

[0019] Level 3: The electrolyte overflows the drain tank and the lead-acid battery electrolyte leaks completely.

[0020] As a further improvement of the present technical solution, in S2, when the insertion frame moves, it slides outward along the slide rail and remains parallel to the ground.

[0021] As a further improvement of the present technical solution, in S2, the insertion frame is contacted through insulating gloves.

[0022] As a further improvement of the present technical solution, in S3, the liquid collecting device includes an electrolyte delivery pipe and a storage barrel connected to the electrolyte delivery pipe, and the electrolyte delivery pipe is connected to the drain tank.

[0023] As a further improvement of the present technical solution, in S4, after the lead-acid battery is taken out of the placement tank, the insertion frame is tilted and the residual electrolyte in the placement tank is cleaned.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] In the method for quickly replacing a lead-acid battery unit, a front panel is provided to observe the degree of damage to the lead-acid battery shell and the degree of leakage, so that different treatments are performed on the insertion frame containing the lead-acid battery, the electrolyte in the insertion frame is cleared, and the lead-acid battery is removed from the insertion frame, thereby enabling the lead-acid battery unit to be quickly replaced. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is an overall flow chart of an embodiment of the present invention;

[0027] Figure 2 is a schematic diagram of a rapid re-swapping device according to an embodiment of the present invention;

[0028] Figure 3 This is a disassembled structural diagram of a power cabinet according to an embodiment of the present invention;

[0029] Figure 4 This is a structural diagram of a unit body disassembled according to an embodiment of the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of the insert frame according to an embodiment of the present invention;

[0031] Figure 6 This is a structural diagram of the back side of the insert frame according to an embodiment of the present invention;

[0032] Figure 7 This is a disassembled diagram of the handwheel structure of an embodiment of the present invention;

[0033] Figure 8 This is a diagram of the disassembled structure of the front panel of an embodiment of the present invention.

[0034] The meaning of each number in the figure is:

[0035] 1. Power cabinet; 11. Cabinet body; 12. Cabinet door; 13. Slide;

[0036] 2. Unit body; 21. Insert frame; 211. Front panel; 212. Frame opening; 213. Plate frame; 214. Glass plate; 215. Latch; 22. Frame cover; 23. Handwheel structure; 231. Rotary wheel; 232. Hanging frame; 233. Hanging plate; 234. Insert shaft; 235. Symmetrical block. DETAILED DESCRIPTION

[0037] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0038] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0039] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature identified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0040] Example 1

[0041] See also Figure 1-8 As shown, the embodiment of the present invention aims to provide a method for quickly replacing a lead-acid battery cell, comprising the following steps:

[0042] S1. Rotate and open the cabinet door 12 of the quick re-swap device to expose the interior of the cabinet 11. Observe the damage and leakage of the lead-acid battery shell inside the frame 21 through the front panel 211.

[0043] S2. Rotate the rotary wheel 231 to drive the insertion shaft 234 out of the slideway 13 through the hanging plate 233, and control the movement of the insertion frame 21 according to the damage degree of the lead-acid battery shell and the leakage degree;

[0044] S3. Wear anti-static clothing, disconnect the cables connected to the subrack 21, connect the liquid collecting device to the drain tank, and then completely pull out the subrack 21.

[0045] S4. Lay the insertion frame 21 flat, open the frame cover 22, remove the fixing bolts, take out the lead-acid battery from the placement slot and replace it.

[0046] The rapid replacement device in the embodiment of the present invention includes a power cabinet 1, which is provided with a plurality of unit bodies 2 for storing lead-acid batteries. In order to facilitate the replacement of lead-acid batteries, the power cabinet 1 includes a cabinet body 11 and a cabinet door 12 rotatably connected to the cabinet body 11. The inner wall of the cabinet body 11 is provided with a plurality of slides 13. The unit body 2 includes an insertion frame 21 slidably connected to the slide 13 and a frame cover 22 arranged on the top of the insertion frame 21. The bottom surface of the insertion frame 21 is provided with a placement groove for storing batteries, and the side wall of the placement groove is provided with a plurality of screw holes for fixing the batteries with bolts. Through the sliding connection and the bolt connection, it can To achieve rapid replacement of lead-acid batteries, in order to facilitate the fixed connection of the lead-acid batteries, a first socket for connecting the battery and a second socket for collecting battery information for communication are provided on the back of the frame 21. A handwheel structure 23 for fixing the unit body 2 is provided on the surface of the frame 21 near the cabinet door 12. The two ends of the handwheel structure 23 are plugged into the slide 13. The first socket and the second socket can be used to connect the lead-acid battery, and the handwheel structure 23 with both ends plugged into the slide 13 can keep the unit body 2 and the power cabinet 1 relatively fixed, thereby achieving fixation of the lead-acid battery.

[0047] In order to facilitate the disassembly of the unit body 2 and the power cabinet 1, a frame opening 212 is provided on the surface of the end of the plug-in frame 21 near the cabinet door 12. The handwheel structure 23 includes a rotary wheel 231 rotatably connected to the inner wall of the frame opening 212 and a hanging frame 232 arranged in the plug-in frame 21. The top of the hanging frame 232 is rotatably connected to a screw shaft, and the top of the screw shaft is engaged with one end of the rotary wheel 231 through a gear. A hanging plate 233 is slidably connected in the hanging frame 232, and the bottom of the screw shaft is threadedly connected to the hanging plate 233. The bottom of the hanging plate 233 is symmetrically slidably connected to the plug shaft 234. The side wall of the slide 13 is provided with a slot, and the plug shaft 234 is plugged into the slide 13 away from the end of the hanging plate 233. 3. Rotate the rotary wheel 231 in the frame opening 212. The rotary wheel 231 drives the screw shaft to rotate through the gear meshing. When the screw shaft rotates, it drives the hanging plate 233 to slide up and down along the hanging frame 232. When the hanging plate 233 moves up along the hanging frame 232, the hanging plate 233 drives the plug shaft 234 to move away from the slide 13, so that the plug shaft 234 is separated from the slide 13. At this time, the unit body 2 can be taken out of the cabinet 11. When the hanging plate 233 moves down along the hanging frame 232, the hanging plate 233 drives the plug shaft 234 to move toward the slide 13 until one end of the plug shaft 234 is inserted into the slot of the slide 13. At this time, the unit body 2 remains relatively fixed to the cabinet 11 and cannot be disassembled.

[0048] In order to facilitate the hanging plate 233 to drive the insertion shaft 234 to move, an inverted triangle is provided at the bottom of the hanging plate 233, and a sliding groove is provided on the inclined surface of the inverted triangle. A slider is provided at one end of the insertion shaft 234 near the hanging plate 233, and the slider is located in the sliding groove. The slider is slidably connected to the sliding groove. Through the sliding connection, when the hanging plate 233 moves up, the slider slides along the sliding groove on the inclined surface of the hanging plate 233 and drives the insertion shaft 234 to move away from the slide 13. When the hanging plate 233 moves down, the slider moves along the direction of the sliding groove, driving the insertion shaft 234 to approach the slide 13 and insert it into the slide 13.

[0049] In order to facilitate observation of the batteries in the insertion frame 21, a front panel 211 is embedded in the surface of the insertion frame 21 near one end of the cabinet door 12. The front panel 211 includes a plate frame 213 fixedly connected to the insertion frame 21 and a glass plate 214 arranged in the plate frame 213. The glass plate 214 is plugged into the plate frame 213. An inner groove is provided in the plate frame 213. A latch 215 is plugged into the inner groove. A reset spring is sleeved on the latch 215. The latch 215 is connected to the inner wall of the inner groove through the reset spring. One end of the latch 215 is plugged into the glass plate 214, and the other end of the latch 215 is plugged into the glass plate 214. One end passes through the frame opening 212, and a symmetrical block 235 is provided on the rotating wheel 231. The latch 215 contacts the surface of the symmetrical block 235, and the batteries inside the insertion frame 21 can be observed through the glass plate 214. By rotating the rotating wheel 231, the symmetrical block 235 is no longer in contact with the latch 215. Under the action of the return spring, the latch 215 moves away from the glass plate 214, so that the latch 215 is disengaged from the glass plate 214 and is no longer plugged into the glass plate 214. At this time, the glass plate 214 can be taken out of the plate frame 213, which facilitates direct observation of the situation inside the insertion frame 21.

[0050] In order to facilitate the heat dissipation of the battery, a first vent is provided on the side wall of the frame 21 and the surface of the frame cover 22, and a plurality of second vents are provided on the surface of the cabinet 11. The first vent and the second vent form an all-round ventilation channel. The all-round ventilation channel is conducive to the flow of air inside the cabinet 11 to facilitate the heat dissipation of the battery, and can avoid explosions caused by hydrogen brought out by the exhaust valve and the static electricity of the operation and maintenance personnel when the battery is loaded.

[0051] In order to avoid corrosion to the lower batteries, a discharge groove is provided on the bottom surface of the placement tank, and a plurality of discharge pipes connected to pipes are provided on the inner wall of the cabinet 11. The discharge pipes are connected to the discharge groove. By providing a discharge groove, when the lead-acid battery causes electrolyte leakage due to installation and replacement operations, the electrolyte falls to the bottom of the placement tank and flows into the discharge groove. The electrolyte enters the discharge pipe along the discharge groove and is then discharged into the cabinet 11, which can prevent the batteries on the upper layer from causing damage such as short circuit and corrosion to the batteries on the lower layer.

[0052] In order to ensure that the busbar DC voltage does not lose voltage, the total positive input port and the total negative output port of the frame 21 are both connected in parallel with reverse diodes. By connecting reverse diodes, when the frame 21 is pulled out for maintenance, it will not cause a short circuit to the entire battery group, which can ensure that the busbar DC voltage does not lose voltage and can continue to provide high current for the busbar DC.

[0053] In this device, the frame 210 adds an independent and sophisticated management system, which mainly includes single battery voltage sampling, ambient temperature, battery internal resistance detection, active balancing, and remaining capacity. It is composed of multiple performance modules such as battery, rectifier, and boost module to make a highly consistent modular DC power supply, which is convenient for on-site operation and maintenance. It can quickly replace lead-acid batteries, reduce operating difficulty and professional skill requirements, and has a standardized design. Spare parts can be prepared in advance, shortening maintenance and power outage inspection time, avoiding the risk of short circuit during construction, and solving the problem of lead-acid battery voltage imbalance. It can more comprehensively detect the health index of each battery in the standard unit.

[0054] Furthermore, in S1, the degree of damage to the lead-acid battery shell includes the following three levels, namely

[0055] Level 1: The damage degree is less than or equal to 0.03, the lead-acid battery shell is intact, there is no risk of leakage of the lead-acid battery, and the subsequent replacement process can be carried out quickly;

[0056] Level 2: The damage degree is greater than 0.03 and less than 0.20. The lead-acid battery casing is damaged, and electrolyte leakage may occur. There is a risk of electric shock. Safety measures must be taken during the subsequent replacement process.

[0057] Level 3: Damage degree is greater than or equal to 0.20. The lead-acid battery casing is damaged. It is risky to remove the lead-acid battery at this time. The lead-acid battery and the frame 21 containing the lead-acid battery need to be shelved and directly replaced with a new frame 21 containing a new lead-acid battery.

[0058] The calculation formula for the shell damage degree is damage degree = shell damaged area / shell total area.

[0059] In addition, in S1, the leakage degree of the lead-acid battery includes the following three degrees, namely

[0060] Level 1: There is no electrolyte in the discharge tank, the lead-acid battery has no leakage, and the operator can directly touch the lead-acid battery after taking anti-static measures;

[0061] Level 2: There is some electrolyte in the discharge tank, and the lead-acid battery is leaking. Operators need to prepare corrosion-resistant clamping tools before handling the lead-acid battery after taking proper anti-static measures.

[0062] Level 3: The electrolyte overflows the drain channel, and the electrolyte of the lead-acid battery is completely leaked. The insertion frame 21 containing the lead-acid battery is put aside, and after waiting or accelerating the complete discharge of the electrolyte in the insertion frame 21, the lead-acid battery is processed using a clamping tool.

[0063] Furthermore, in S2, when the insertion frame 21 moves, it slides outward along the slide 13 and remains parallel to the ground, and the insertion frame 21 is touched by insulating gloves. When the lead-acid battery shell is damaged, by moving the lead-acid battery on the slide 13 parallel to the ground, it can avoid the electrolyte gushing out of the shell and overflowing the placement slot, which requires additional steps to clean the insertion frame 21.

[0064] Furthermore, in S3, the liquid collecting device includes an electrolyte delivery pipe and a storage barrel connected to the electrolyte delivery pipe. The electrolyte delivery pipe is connected to the discharge trough. The liquid collecting device can collect the electrolyte gathered in the placement tank and collect the overflowed electrolyte when the insertion frame 21 moves, thereby preventing the electrolyte from overflowing the placement tank.

[0065] In addition, in S4, after the lead-acid battery is taken out from the placement tank, the insertion frame 21 is tilted so that the electrolyte flows into the drain chute and is discharged, and the residual electrolyte in the placement tank is cleaned and discharged through the drain chute.

[0066] During use of the embodiment of the present invention, the cabinet door 12 of the quick re-swap device is rotated to open the interior of the cabinet 11. The degree of damage to the lead-acid battery shell and the degree of leakage of the lead-acid battery inside the insertion frame 21 are observed through the front panel 211. The rotary wheel 231 is rotated to drive the insertion shaft 234 to disengage the slide 13, thereby releasing the fixed connection between the insertion frame 21 and the cabinet 11. The movement of the insertion frame 21 is controlled according to the degree of damage to the lead-acid battery shell and the degree of leakage. The degree of damage to the lead-acid battery shell and the degree of leakage include the following situations:

[0067] a. When the lead-acid battery shell is damaged to level 1 and the leakage level is level 1, that is, the lead-acid battery shell is intact and there is no leakage, the operator wears anti-static clothing and disconnects the cables connected to the subrack 21. Pull the subrack 21 outward, lay the subrack 21 flat, open the frame cover 22, remove the fixing bolts to release the fixed connection between the lead-acid battery and the placement slot, and then directly remove and replace the lead-acid battery.

[0068] b. When the damage degree of the lead-acid battery shell is level 2 and the leakage degree is level 1 or level 2, that is, the lead-acid battery shell has damage and leakage may occur or leakage has occurred but the electrolyte is flowing out slowly, the operator, after wearing anti-static clothing and insulating gloves, uses insulating tools to touch and disconnect the cables connected to the subframe 21, and gently pulls the subframe 21 outward. The electrolyte delivery pipe of the liquid collection device is connected to the drain chute of the subframe 21. After the electrolyte accumulated in the storage chute is drained, the frame cover 22 is opened and the fixing bolts are removed. The lead-acid battery is removed and replaced. After the lead-acid battery is removed, the subframe 21 is tilted to clean the residual electrolyte in the storage chute and allow it to be discharged through the drain chute;

[0069] c. When the damage degree of the lead-acid battery shell is level 2 or level 3, and the leakage degree is level 3, that is, the lead-acid battery shell is damaged and the electrolyte inside it continues to leak, the operator, after wearing anti-static clothing, disconnects the cables connected to the subframe 21 with an insulating tool, pulls the subframe 21 outward and blocks the drain chute, pulls out the subframe 21 and puts it aside for disposal, and directly replaces it with a new subframe 21 containing a new lead-acid battery. For the subframe 21 that has been put aside, connect the drain chute to the drainage pipe. After the electrolyte is completely drained, open the frame cover 22 and remove the fixing bolts to remove the damaged lead-acid battery from the placement tank. The subframe 21 is cleaned and recycled for future use.

[0070] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely preferred examples of the present invention and are not intended to limit the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for quickly replacing a lead-acid battery cell, characterized in that: The following steps are involved: S1. Rotate and open the cabinet door (12) of the quick re-exchange device to expose the interior of the cabinet (11), and observe the damage degree and leakage degree of the lead-acid battery shell inside the plug-in frame (21) through the front panel (211); S2, rotating the rotary wheel (231) to drive the plug shaft (234) to separate from the slideway (13) through the hanging plate (233), and controlling the movement of the plug frame (21) according to the damage degree of the lead-acid battery shell and the leakage degree; S3, wearing anti-static clothing, disconnecting the cable connecting the plug-in frame (21) and connecting the liquid collecting device to the drain tank, and then completely pulling out the plug-in frame (21); S4, lay the insert frame (21) flat and open the frame cover (22), remove the fixing bolts, remove the lead-acid battery from the placement slot and replace it; The above-mentioned rapid replacement device includes a power cabinet (1), wherein a plurality of unit bodies (2) for storing lead-acid batteries are provided in the power cabinet (1), the power cabinet (1) includes a cabinet body (11) and a cabinet door (12) rotatably connected to the cabinet body (11), the inner wall of the cabinet body (11) is provided with a plurality of slideways (13), the unit body (2) includes an insertion frame (21) slidably connected to the slideway (13) and a frame cover (22) arranged on the top of the insertion frame (21), the inner bottom surface of the insertion frame (21) is provided with a placement groove for storing batteries, the side wall of the placement groove is provided with a plurality of screw holes for bolting the batteries, the back of the insertion frame (21) is provided with a first socket for connecting the battery and a second socket for collecting battery information for communication, the insertion frame (21) is provided with a handwheel structure (23) for fixing the unit body (2) on the surface close to the cabinet door (12), and both ends of the handwheel structure (23) are plug-fitted with the slideway (13); The insert frame (21) is provided with a frame opening (212) on the surface of one end close to the cabinet door (12), the handwheel structure (23) includes a rotary wheel (231) rotatably connected to the inner wall of the frame opening (212) and a hanging frame (232) arranged in the insert frame (21), the top of the hanging frame (232) is rotatably connected to a screw shaft, the top of the screw shaft is meshed with one end of the rotary wheel (231) through a gear, a hanging plate (233) is slidably connected in the hanging frame (232), the bottom of the screw shaft is threadedly connected to the hanging plate (233), the bottom of the hanging plate (233) is symmetrically slidably connected to an insert shaft (234), a slot is provided on the side wall of the slideway (13), and the end of the insert shaft (234) away from the hanging plate (233) is plugged into the slideway (13); A front panel (211) is embedded in a surface of one end of the insertion frame (21) close to the cabinet door (12).

2. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In S1, the damage degree of the lead-acid battery shell includes the following three levels, namely: Level 1: damage degree is less than or equal to 0.03, and the lead-acid battery shell is intact; Level 2: The damage degree is greater than 0.03 and less than 0.20, and the lead-acid battery shell is damaged; Level 3: damage degree is greater than or equal to 0.20, and the lead-acid battery casing is damaged.

3. The method for quickly replacing a lead-acid battery cell according to claim 2, wherein: The calculation formula for the shell damage degree is damage degree = shell damaged area / shell total area.

4. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In S1, the leakage degree of the lead-acid battery includes the following three degrees, namely: Level 1: There is no electrolyte in the drain tank and no leakage from the lead-acid battery; Level 2: There is some electrolyte in the discharge tank, and the lead-acid battery is leaking; Level 3: The electrolyte overflows the drain tank and the lead-acid battery electrolyte leaks completely.

5. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In the step S2, the insert frame (21) slides outward along the slideway (13) and remains parallel to the ground when moving.

6. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In the S2, the insertion frame (21) is contacted through insulating gloves.

7. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In S3, the liquid collecting device includes an electrolyte delivery pipe and a storage bucket connected to the electrolyte delivery pipe, and the electrolyte delivery pipe is connected to the drain tank.

8. The method for quickly replacing a lead-acid battery cell according to claim 1, wherein: In said S4, after the lead-acid battery is taken out from the placement tank, the insertion frame (21) is tilted and the residual electrolyte in the placement tank is cleaned.

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