Lead storage battery for electric vehicle

Abstract

The invention discloses a lead storage battery for an electric vehicle, and relates to the technical field of secondary batteries, the lead storage battery comprises a shell, a cover plate is arranged on the shell, two conical sleeves are arranged in the shell, a guide frame is arranged at the bottom of each conical sleeve, a lifting column is arranged in each guide frame, and a floating plate is arranged at the bottom of each lifting column; extension mechanisms are arranged on the top wall of the shell, and each extension mechanism comprises an expansion plate; the expansion plates are folded to form a funnel to enlarge the area of the liquid inlet, electrolyte can be conveniently added, when the expansion plates are pressed downwards to be opened, the lifting columns are tightly connected with the conical sleeves in an abutting mode through the lifting rods, and therefore the liquid inlet is blocked to ensure the sealing performance of the shell. The floating plate is matched with the lifting column, so that the liquid inlet is automatically blocked after the electrolyte is added to a certain amount, and the condition of insufficient or excessive supplement is avoided; when the expansion plates rotate, the corresponding rotating cylinders are driven to ascend and descend, so that the bristles are driven to rotate around the connecting wires, and oxides at the connecting positions of the binding posts and the wires are cleaned.

Description

Technical Field

[0001] The present invention relates to the technical field of secondary batteries, and in particular to a lead-acid battery for electric vehicles. Background Art

[0002] Lead-acid battery, also known as lead-acid battery, is a battery whose electrodes are mainly made of lead and its oxides, and whose electrolyte is sulfuric acid solution. It has the advantages of stable voltage, low price, and recyclability, and is widely used in automobile starting, electric bicycles, UPS power supply and other fields; it relies on internal chemical reactions to store electrical energy or supply power to electrical equipment. Lead-acid battery is composed of plates, separators, electrolytes, battery tanks, etc. The plates are the core part of lead-acid batteries. The chemical reactions of battery charging and discharging mainly rely on the active substances on the plates and the electrolyte. The plates are divided into positive plates and negative plates. Both the positive plates and negative plates are composed of grids and active substances coated on the grids; a certain number of positive and negative plates and separators form a pole group, and the positive and negative buses connect the pole ears of all the positive plates and negative plates of each pole group respectively. The positive and negative buses are connected to the positive and negative poles respectively. The positive and negative poles at the beginning and end of the series circuit are end poles, which are connected to the positive and negative terminals respectively. The positive and negative terminals are used to connect the power cord when in use.

[0003] The electrolyte in the lead-acid battery has the functions of participating in electrochemical reactions, maintaining the internal balance of the battery, protecting the electrodes and extending the battery life. When the lead-acid battery is in use, the electrolyte will be consumed due to charging and discharging, natural evaporation, poor sealing and the like. It is necessary to replenish the electrolyte in the lead-acid battery in a timely manner. The existing lead-acid battery has an opaque shell, so it is not possible to quickly add the required amount of electrolyte when adding the electrolyte, which easily leads to insufficient or excessive replenishment. In addition, the hole for adding the electrolyte is small, which is not convenient for observation. When pouring the electrolyte, it is easy to spill on the battery shell, causing waste. Summary of the invention

[0004] The object of the present invention is to provide a lead storage battery for electric vehicles to solve the above-mentioned deficiencies in the prior art.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a lead-acid battery for an electric vehicle, comprising a shell with two liquid inlets on the top, a cover plate rotatably arranged on the shell, two conical sleeves fixedly arranged on the top wall of the shell, a guide frame fixedly arranged at the bottom of each conical sleeve, a lifting column for blocking the liquid inlet of the lead-acid battery slidably arranged in each guide frame, and a floating plate fixedly arranged at the bottom of the lifting column; two extension mechanisms for expanding the liquid inlet of the lead-acid battery are fixedly arranged on the top wall of the shell, each of the extension mechanisms includes four expansion plates rotatably arranged on the top of the shell, when the expansion plates are opened, the lifting columns are driven to move upward and the lifting columns are locked to block the liquid inlet, when the expansion plates are closed, a funnel-shaped expansion port is formed to expand the range of the liquid inlet, and the lifting columns are unlocked to open the liquid inlet.

[0006] Preferably, each of the extension mechanisms further comprises four first telescopic rods fixedly arranged on the top wall of the shell, a connecting plate is fixedly arranged at one end of each of the first telescopic rods away from the shell, and a spring is fixedly arranged between each of the connecting plates and the shell.

[0007] Preferably, a sliding frame is fixedly provided on one side of each expansion board close to the shell, and a sliding rod is fixedly provided on one end of each connecting board close to the expansion board, and each sliding rod is slidably provided in each sliding frame one by one.

[0008] Preferably, a fixing cylinder is slidably arranged in each lifting column, a fixing block is fixedly arranged at one end of each fixing cylinder away from the inner top wall of the shell, two clamping blocks are slidably arranged in each fixing block, and each fixing cylinder is fixedly connected to the top wall of the shell.

[0009] Preferably, a lifting rod is slidably arranged in each of the fixed cylinders, and each of the lifting rods is provided with two oblique grooves. A first sliding block is fixedly arranged at one end of each of the clamping blocks close to the lifting rod, and each of the first sliding blocks is slidably arranged in each oblique groove one by one.

[0010] Preferably, four L-shaped grooves are provided in each of the fixing blocks, and second sliding blocks are fixedly provided on both sides of each of the clamping blocks, and each of the second sliding blocks is slidably provided in each of the L-shaped grooves in a one-to-one correspondence.

[0011] Preferably, second telescopic rods are fixedly provided on the two expansion plates, and the top end of each lifting rod is rotationally connected to each second telescopic rod in a one-to-one correspondence.

[0012] Preferably, terminals are fixedly provided on both sides of the shell, rotating cylinders are rotatably provided on both sides of the shell, a plurality of bristles are fixedly provided in each rotating cylinder, and each rotating cylinder is rotatably connected to one of the connecting plates.

[0013] Preferably, a spiral groove is formed on the outer peripheral surface of the rotating cylinder, and four abutment balls adapted to the spiral groove are fixedly provided on the top wall of the shell.

[0014] Preferably, a support plate is fixedly provided on the side wall of the shell, a locking block is rotatably provided on the support plate, a side of the locking block close to the shell is provided as an inclined surface, and torsion springs are fixedly provided between both sides of the locking block and the support plate.

[0015] In the above technical scheme, the present invention provides a lead-acid battery for electric vehicles, which has the following beneficial effects: 1. The expansion plates are closed to form a funnel to expand the area of ​​the liquid inlet, which makes it convenient to add electrolyte into the lead-acid battery and prevents the electrolyte from spilling and causing waste. When the expansion plate is pressed down and opened, the lifting column and the conical sleeve are tightly abutted by the lifting rod, thereby sealing the liquid inlet to ensure the sealing of the shell; 2. The liquid inlet is automatically sealed after a certain amount of electrolyte is added through the cooperation of the floating plate and the lifting column, thereby avoiding insufficient or excessive replenishment; 3. When the expansion plate rotates, it drives the corresponding rotating cylinder to rise and fall, thereby driving the bristles to rotate around the wiring, and then cleaning the oxides at the connection between the wiring post and the wire. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0017] Figure 1 A schematic diagram of the overall structure provided for an embodiment of the present invention;

[0018] Figure 2 A schematic diagram of the structure of a cover plate provided in an embodiment of the present invention;

[0019] Figure 3 A schematic diagram of the structure of a floating plate provided in an embodiment of the present invention;

[0020] Figure 4 A schematic diagram of the structure of a lifting column provided in an embodiment of the present invention;

[0021] Figure 5 A schematic diagram of the structure of a rotating drum provided by an embodiment of the present invention;

[0022] Figure 6 A schematic diagram of the structure of an expansion board provided in an embodiment of the present invention;

[0023] Figure 7 A schematic diagram of the structure of a fixing cylinder provided in an embodiment of the present invention;

[0024] Figure 8 A schematic diagram of the structure inside the lifting column provided by an embodiment of the present invention;

[0025] Fig. 9 The embodiment of the present invention provides Figure 1 A magnified view of the structure at center A;

[0026] Fig.10 The embodiment of the present invention provides Figure 7 A magnified view of the structure at point B.

[0027] Description of reference numerals:

[0028] 1. Shell; 101. Groove; 102. Liquid inlet; 2. Cover plate; 3. Terminal; 4. Partition; 11. Expansion plate; 12. Sliding frame; 13. First telescopic rod; 14. Spring; 15. Connecting plate; 16. Sliding rod; 17. Rotating cylinder; 18. Abutting ball; 21. Conical sleeve; 22. Guide frame; 23. Lifting column; 24. First movable cavity; 25. Second movable cavity; 26. Fixed cylinder; 27. Fixed block; 271. L-shaped groove; 28. Connecting rod; 29. ​​Floating plate; 31. Lifting rod; 32. Inclined groove; 33. Block; 34. First slider; 35. Second slider; 36. Second telescopic rod; 41. Support plate; 42. Locking block; 43. Torsion spring; 44. Inclined surface. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.

[0030] See also Figure 1-10A lead-acid battery for an electric vehicle comprises a shell 1 with two liquid inlets 102 on the top, a cover plate 2 is rotatably arranged on the shell 1, two conical sleeves 21 are fixedly arranged on the top wall of the shell 1, a guide frame 22 is fixedly arranged at the bottom of each conical sleeve 21, a lifting column 23 for blocking the liquid inlet 102 of the lead-acid battery is slidably arranged in each guide frame 22, and a floating plate 29 is fixedly arranged at the bottom of the lifting column 23; two extension mechanisms for expanding the liquid inlet 102 of the lead-acid battery are fixedly arranged on the top wall of the shell 1, and each extension mechanism includes four expansion plates 11 rotatably arranged on the top of the shell 1, and when the expansion plate 11 is opened, the lifting column 23 is driven to move upward and lock the lifting column 23 to block the liquid inlet 102, and a leakage is formed when the expansion plate 11 is closed. The bucket-shaped expansion port expands the range of the liquid inlet 102, and the lifting column 23 is unlocked to open the liquid inlet 102; the top wall of the shell 1 is provided with two grooves 101 for the movement of the expansion plate 11, and the cover plate 2 is fixedly rotatably arranged on one side of the shell 1, and the shell 1 is sealed by the cover plate 2. When the cover plate 2 is opened, the four expansion plates 11 of each extension mechanism are automatically closed together. When the cover plate 2 is closed, the four expansion plates 11 of each extension mechanism are squeezed to open and shrink into the corresponding grooves 101. The inner circle of the top of the conical sleeve 21 is aligned with the liquid inlet 102, and the inside of the conical sleeve 21 has a through-conical groove. The top of the lifting column 23 is a conical shape adapted to the conical sleeve 21, and the outer peripheral surface of the top of the lifting column 23 is wrapped with a layer of rubber sleeve (not marked in the figure). When the top of the lifting column 23 abuts against the inner wall of the conical sleeve 21, the conical sleeve 21 and the lifting column 23 form a sealing structure, which can block the corresponding liquid inlet 102 to prevent liquid or air from entering the lead-acid battery through the liquid inlet 102. The guide frame 22 is used to guide the lifting column 23. The floating plate 29 is made of corrosion-resistant materials such as polypropylene, high-density polyethylene, etc. There are two extension mechanisms, each of which is fixedly arranged directly above the liquid inlet 102. Each liquid inlet 102 is arranged in a square shape. The four expansion plates 11 of each extension mechanism are evenly rotated and arranged on the four sides of the liquid inlet 102. Rubber strips (not marked in the figure) are fixedly arranged on both sides of each expansion plate 11. When the four expansion plates 11 of the same extension mechanism are closed together , the rubber strips abut against each other, so that the four expansion plates 11 form a funnel, and the rubber strips can effectively prevent the electrolyte from leaking out of the gaps in the expansion plates 11. In the initial state, the top of the lifting column 23 abuts against the inner wall of the conical sleeve 21. When the four expansion plates 11 of the same extension mechanism are closed together to form a funnel, the lifting column 23 is unlocked. At this time, if the electrolyte inside the lead-acid battery is sufficient, the lifting column 23 will not move downward due to the buoyancy of the electrolyte on the floating plate 29, and the liquid inlet 102 will be blocked. At this time, the electrolyte will not enter the lead-acid battery when electrolyte is added to the liquid inlet 102. On the contrary, if the electrolyte in the lead-acid battery is insufficient at this time, the unlocked lifting column 23 and the floating plate 29 will move downward, and the liquid inlet 102 will be opened.At this time, by pouring the electrolyte into the funnel formed by the corresponding extension mechanism, the electrolyte will flow into the lead-acid battery from the corresponding liquid inlet 102. As the electrolyte in the lead-acid battery increases, the floating plate 29 gradually moves up and drives the lifting column 23 to move up. When the electrolyte in the lead-acid battery reaches the specified height, the corresponding floating plate 29 floats up to make the lifting column 23 abut against the conical sleeve 21 again. At this time, the liquid inlet 102 is blocked again, so that the electrolyte in the lead-acid battery is kept in an appropriate range, which is convenient for observation and confirmation, and will not cause insufficient or excessive replenishment. At the same time, the expansion plate 11 that is closed together is more convenient for adding electrolyte to the lead-acid battery, and can effectively prevent the electrolyte from being spilled on the lead-acid battery housing 1. It should be noted that when the electrolyte in the lead-acid battery reaches the specified height, the force of the floating plate 29 pushing the lifting column 23 upward is greater than the sum of the gravity when the funnel-shaped extension mechanism is full of electrolyte and the friction between the lifting column 23 and the guide frame 22.

[0031] Furthermore, each extension mechanism also includes four first telescopic rods 13 fixedly arranged on the top wall of the shell 1, and a connecting plate 15 is fixedly arranged at one end of each first telescopic rod 13 away from the shell 1, and a spring 14 is fixedly arranged between each connecting plate 15 and the shell 1; the four first telescopic rods 13 of each extension mechanism are evenly arranged on the outer side of the corresponding liquid inlet 102, and when the cover plate 2 is closed, the corresponding connecting plate 15 is pressed downward by the cover plate 2, so that the corresponding first telescopic rod 13 and the spring 14 are compressed downward, so that the cover plate 2 can successfully cover the shell 1, protect the shell 1, and effectively prevent dust from falling on the top of the shell 1, when the cover plate 2 is opened, the corresponding connecting plate 15 is raised by the elastic force of each spring 14, thereby lifting the corresponding expansion plate 11, and since the bottom of the expansion plate 11 is rotatably connected to the shell 1, when the four expansion plates 11 of the same extension mechanism are lifted at the same time, a funnel will be formed, and a circular groove (not marked in the figure) for the first telescopic rod 13 and the spring 14 to retract is provided on the top of the shell 1.

[0032] Furthermore, a sliding frame 12 is fixedly provided on one side of each expansion plate 11 close to the shell 1, and a sliding rod 16 is fixedly provided on one end of each connecting plate 15 close to the expansion plate 11, and each sliding rod 16 is slidably arranged in each sliding frame 12 in a one-to-one manner; the extension mechanism is located on both sides of the shell 1, and the four sliding rods 16 on the same side are fixedly connected together to form a square circle. When the cover plate 2 is pressed down, each expansion plate 11 is squeezed, and each expansion plate 11 rotates downward, and the corresponding connecting plate 15 moves downward together through the cooperation of each sliding frame 12 and the corresponding sliding rod 16. When the cover plate 2 is opened, the corresponding connecting plate 15 is moved upward by each spring 14. At this time, the four expansion plates 11 on the same side are rotated upward at the same time through the sliding rod 16 fixed to the connecting plate 15, thereby forming a funnel.

[0033] In another embodiment of the present invention: a fixed cylinder 26 is slidably provided in each lifting column 23, a fixed block 27 is fixedly provided at one end of each fixed cylinder 26 away from the inner top wall of the shell 1, two clamping blocks 33 are slidably provided in each fixed block 27, each fixed cylinder 26 is fixedly connected to the top wall of the shell 1; the fixed cylinder 26 and the fixed block 27 are fixedly connected to the shell 1, a first movable cavity 24 for sliding the fixed block 27 is provided in each lifting column 23, and a second movable cavity 25 for extending the clamping block 33 is provided in each lifting column 23, and the same lifting column The first movable chamber 24 and the second movable chamber 25 in the lead-acid battery 23 are connected to each other. When the cover plate 2 is opened, each expansion plate 11 rotates upward. At this time, one of the expansion plates 11 in each extension mechanism drives the two card blocks 33 on the corresponding fixed block 27 to retract into the fixed block 27. At this time, the card block 33 does not contact the lifting column 23, and the lifting column 23 can slide up and down on the fixed cylinder 26. When the lead-acid battery lacks electrolyte, the lifting column 23 moves down. As the electrolyte in the lead-acid battery is replenished, the lifting column 23 gradually moves up. When the electrolyte is replenished, the lifting column 23 gradually moves up. After the filling is completed, the inner bottom wall of the lifting column 23 abuts against the bottom of the fixed block 27. At this time, the lifting column 23 will not rise any more. The top of the lifting column 23 abuts against the inner wall of the corresponding conical sleeve 21 to block the liquid inlet 102. The outer peripheral surface of the fixed block 27 fits with the inner wall of the first active cavity 24. Through the cooperation between the first active cavity 24 and the fixed block 27, the lifting column 23 can only drop a certain distance. When the electrolyte is added, the cover plate 2 is closed, and the cover plate 2 squeezes each expansion plate 11 to rotate downward. When the expansion plate 11 rotates downward, it drives the corresponding fixed block 27. The card block 33 on the expansion board 11 extends out, and the extended card block 33 abuts against the top wall of the second active chamber 25. The top of the expansion board 11 rotates downward, and the bottom of the expansion board 11 is positioned upward. After the card block 33 abuts against the top wall of the second active chamber 25, the expansion board 11 will continue to rotate at a certain angle. At this time, the corresponding card block 33 is driven to move upward through the expansion board 11, thereby causing the corresponding lifting column 23 to move upward. When the lifting column 23 moves upward, the rubber sleeve on its top is compressed and tightly abutted against the conical sleeve 21, thereby increasing the sealing performance of the liquid inlet 102.

[0034] Furthermore, a lifting rod 31 is slidably provided in each fixed cylinder 26, and each lifting rod 31 is provided with two inclined grooves 32, and each block 33 is fixedly provided with a first slider 34 at one end close to the lifting rod 31, and each first slider 34 is slidably provided in each inclined groove 32 in a one-to-one correspondence; when the expansion plate 11 is closed, the lifting rod 31 is driven to move downward, and when the lifting rod 31 moves downward, the corresponding block 33 is retracted into the fixed block 27 through the cooperation of the inclined groove 32 and the first slider 34, so that the block 33 is separated from the lifting column 23, and the lifting column 23 can move up and down at this time, so that the lifting column 23 moves downward by the floating plate 29 and the gravity of the lifting column 23 itself, and then A gap is formed between the top of the lifting column 23 and the conical sleeve 21, and the electrolyte can enter the lead-acid battery from the liquid inlet 102 at this time. When the expansion plate 11 is opened, the lifting rod 31 is driven to move upward. When the lifting rod 31 moves upward, it drives the corresponding block 33 to extend from the fixed block 27, so that the block 33 abuts against the lifting column 23, thereby preventing the lifting column 23 from descending again. A connecting rod 28 is fixedly provided on the floating plate 29, and one end of the connecting rod 28 away from the floating plate 29 is fixedly connected to the corresponding lifting column 23. When the floating plate 29 drives the top of the lifting column 23 to abut against the conical sleeve 21, the second active chamber 25 just moves to the position of the corresponding block 33.

[0035] Specifically, four L-shaped grooves 271 are provided in each fixed block 27, and second sliders 35 are fixedly provided on both sides of each clamping block 33, and each second slider 35 is slidably provided in each L-shaped groove 271 in a one-to-one correspondence; the L-shaped grooves 271 are symmetrically provided on the two inner side walls of the fixed block 27, and when the first slider 34 on the clamping block 33 is at the upper end of the corresponding inclined groove 32, the second slider 35 is at the side of the corresponding long arm end of the L-shaped groove 271 close to the lifting rod 31, and at this time, the clamping block 33 is completely retracted into the fixed block 27, and when the first slider 34 on the clamping block 33 moves to the lower end of the corresponding inclined groove 32 , the second slider 35 is at the end of the long arm end of the corresponding L-shaped groove 271 away from the lifting rod 31. At this time, the block 33 extends out from the fixed block 27 and abuts against the lifting column 23. At this time, the cover plate 2 is continued to be pressed down to make the expansion plate 11 continue to rotate downward, and the expansion plate 11 drives the lifting rod 31 to continue to move upward. The lifting rod 31 lifts each block 33 upward through each first slider 34, and each second slider 35 enters the short arm end of the corresponding L-shaped groove 271 and moves upward, thereby driving the lifting column 23 to move upward so that the rubber sleeve at the top thereof is tightly abutted against the conical sleeve 21, which greatly increases the sealing performance of the lead-acid battery.

[0036] Furthermore, second telescopic rods 36 are fixedly provided on the two expansion plates 11, and the top ends of the lifting rods 31 are rotationally connected to the second telescopic rods 36 in a one-to-one manner; the two second telescopic rods 36 are respectively arranged on the expansion plates 11 of different extension mechanisms, and the lower ends of the second telescopic rods 36 are rotationally connected to the top ends of the corresponding lifting rods 31. When the top ends of the expansion plates 11 fixedly connected to the second telescopic rods 36 are rotated downward, the corresponding lifting rods 31 are moved upward by the second telescopic rods 36 arranged on the lower side of the expansion plates 11; when the top ends of the expansion plates 11 fixedly connected to the second telescopic rods 36 are rotated upward, the corresponding lifting rods 31 are moved downward, that is, when the cover plate 2 is opened, the expansion plates 11 are closed, the block 33 is retracted, and the lifting columns 23 are unlocked; when the cover plate 2 is closed, the expansion plates 11 are opened, the block 33 is extended, and the lifting columns 23 are locked.

[0037] In another embodiment of the present invention: terminals 3 are fixedly provided on both sides of the shell 1, rotating cylinders 17 are rotatably provided on both sides of the shell 1, a number of bristles are fixedly provided in each rotating cylinder 17, and each rotating cylinder 17 is rotatably connected to one of the connecting plates 15; a partition 4 is fixedly provided in the shell 1, and the shell 1 is divided into two cavities by the partition 4, each cavity has the plates, connecting strips and poles required for the lead-acid battery, the liquid inlet 102 and the extension mechanism are respectively located in the two cavities, the terminal 3 is electrically connected to the wire and the pole, one end of the terminal 3 extends into the shell 1, and the other end is exposed from the shell 1 and connected to the wire. This is the prior art, but no further elaboration is required. After the lead-acid battery in the shell 1 is used for a long time, white powdery lead sulfate usually appears at the connection between the terminal 3 and the wire. This The white powder is an oxide formed by a chemical reaction between the acid solution in the battery and the terminal 3 and the power cord clip after evaporation. Lead sulfate is a non-conductive substance. It will increase the line resistance, resulting in difficulty in starting, and may corrode the battery clip and connecting wires, affecting the conductivity and battery life of the battery. The connecting plate 15 close to the rotating cylinder 17 is rotatably connected to the rotating cylinder 17. When the cover 2 is opened or closed, it will drive the top of each expansion plate 11 to move up and down, thereby driving the corresponding connecting plate 15 to move up and down. The connecting plate 15 that moves up and down will drive the rotating cylinder 17 to move up and down. The rotating cylinder 17 will rotate when it moves up and down. The rotating cylinder 17 is sleeved on the outer peripheral surface of the terminal 3. When the rotating cylinder 17 rotates, the bristles inside it rotate accordingly, thereby cleaning the oxide at the connection between the terminal 3 and the wire.

[0038] Specifically, a spiral groove is provided on the outer circumferential surface of the rotating cylinder 17, and four abutment balls 18 adapted to the spiral groove are fixedly arranged on the top wall of the shell 1; the shell 1 has a recessed hole (not marked in the figure) for the rotating cylinder 17 to move up and down, and two terminal posts 3 are fixedly arranged in the corresponding recessed holes, and two abutment balls 18 are arranged in the same recessed hole. When the rotating cylinder 17 moves up and down, the rotating cylinder 17 rotates around the terminal post 3 through the cooperation of the abutment balls 18 and the spiral groove, thereby removing the oxide at the connection between the lifting terminal post 3 and the wire.

[0039] In another embodiment of the present invention: a support plate 41 is fixedly provided on the side wall of the shell 1, and a locking block 42 is rotatably provided on the support plate 41, and a side of the locking block 42 close to the shell 1 is provided with an inclined surface 44, and torsion springs 43 are fixedly provided between the two sides of the locking block 42 and the support plate 41; in the initial state, the locking block 42 is kept in a vertical state by the torsion spring 43, and when the cover plate 2 needs to be closed, the cover plate 2 is pressed down so that the cover plate 2 abuts against the inclined surface 44 of the locking block 42, and at this time, the locking block 42 will deflect in the direction away from the cover plate 2, so that the cover plate 2 abuts against the shell 1 together, and when the cover plate 2 moves to the lower end of the locking block 42, the locking block 42 is rotated by the torsion spring 43, so that the bottom of the locking block 42 abuts against the cover plate 2 Then, the cover plate 2 is closed on the shell 1. When the cover plate 2 needs to be opened, the locking block 42 is pushed in the direction away from the cover plate 2 to separate the locking block 42 from the cover plate 2. At this time, the cover plate 2 can be opened. When the cover plate 2 is opened, the expansion plate 11 automatically rises and drives the rotating cylinder 17 to move upward and rotate to clean the oxides on the terminal 3. At the same time, the lock of the lifting column 23 is opened. The lifting column 23 automatically controls the closing or opening of the liquid inlet 102 according to the amount of electrolyte in the shell 1. When the cover plate 2 is closed, the expansion plate 11 descends, so that the rotating cylinder 17 cleans the terminal 3 again. At the same time, the lifting column 23 is locked, driving the lifting column 23 to lift and tightly abut against the conical sleeve 21 to ensure the sealing of the shell 1.

[0040] The above description is only by way of illustration of certain exemplary embodiments of the present invention. It is undoubted that those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A lead-acid battery for an electric vehicle, comprising a housing (1) with two liquid inlets (102) formed on the top, characterized in that: A cover plate (2) is rotatably provided on the shell (1), two conical sleeves (21) are fixedly provided on the top wall of the shell (1), a guide frame (22) is fixedly provided at the bottom of each conical sleeve (21), a lifting column (23) for blocking the lead-acid battery liquid inlet (102) is slidably provided in each guide frame (22), and a floating plate (29) is fixedly provided at the bottom of the lifting column (23); The top wall of the housing (1) is fixedly provided with two extension mechanisms for expanding the liquid inlet (102) of the lead-acid battery, each of the extension mechanisms comprising four extension plates (11) rotatably arranged on the top of the housing (1); when the extension plates (11) are opened, the lifting columns (23) are driven to move upward and the lifting columns (23) are locked so that the lifting columns (23) are blocked to block the liquid inlet (102); when the extension plates (11) are closed, a funnel-shaped expansion port is formed to expand the range of the liquid inlet (102), and the lifting columns (23) are unlocked to open the liquid inlet (102).

2. A lead-acid battery for electric vehicles according to claim 1, characterized in that: Each of the extension mechanisms further comprises four first telescopic rods (13) fixedly arranged on the top wall of the shell (1); a connecting plate (15) is fixedly arranged at one end of each of the first telescopic rods (13) away from the shell (1); and a spring (14) is fixedly arranged between each of the connecting plates (15) and the shell (1).

3. A lead-acid battery for electric vehicles according to claim 2, characterized in that: A sliding frame (12) is fixedly arranged on one side of each expansion board (11) close to the shell (1), and a sliding rod (16) is fixedly arranged on one end of each connection board (15) close to the expansion board (11), and each sliding rod (16) is slidably arranged in each sliding frame (12) in a one-to-one correspondence.

4. A lead-acid battery for electric vehicles according to claim 3, characterized in that: A fixing cylinder (26) is slidably disposed in each lifting column (23), a fixing block (27) is fixedly disposed at one end of each fixing cylinder (26) away from the inner top wall of the shell (1), two clamping blocks (33) are slidably disposed in each fixing block (27), and each fixing cylinder (26) is fixedly connected to the top wall of the shell (1).

5. A lead-acid battery for electric vehicles according to claim 4, characterized in that: A lifting rod (31) is slidably arranged in each of the fixed cylinders (26), and two inclined grooves (32) are provided on each of the lifting rods (31). A first sliding block (34) is fixedly arranged at one end of each of the clamping blocks (33) close to the lifting rod (31), and each of the first sliding blocks (34) is slidably arranged in each of the inclined grooves (32) in a one-to-one correspondence.

6. A lead-acid battery for electric vehicles according to claim 5, characterized in that: Four L-shaped grooves (271) are provided in each of the fixed blocks (27), and second sliding blocks (35) are fixedly provided on both sides of each of the clamping blocks (33), and each of the second sliding blocks (35) is slidably provided in each of the L-shaped grooves (271) in a one-to-one correspondence.

7. A lead-acid battery for electric vehicles according to claim 6, characterized in that: The two expansion plates (11) are fixedly provided with second telescopic rods (36), and the top ends of the lifting rods (31) are rotationally connected to the second telescopic rods (36) in a one-to-one corresponding manner.

8. A lead-acid battery for electric vehicles according to claim 7, characterized in that: Terminal blocks (3) are fixedly arranged on both sides of the shell (1), rotating cylinders (17) are rotatably arranged on both sides of the shell (1), a plurality of bristles are fixedly arranged in each rotating cylinder (17), and each rotating cylinder (17) is rotatably connected to one of the connecting plates (15).

9. A lead-acid battery for electric vehicles according to claim 8, characterized in that: The outer peripheral surface of the rotating cylinder (17) is provided with a spiral groove, and the top wall of the shell (1) is fixedly provided with four abutment balls (18) adapted to the spiral groove.

10. A lead-acid battery for electric vehicles according to claim 9, characterized in that: A support plate (41) is fixedly provided on the side wall of the shell (1), a locking block (42) is rotatably provided on the support plate (41), a side of the locking block (42) close to the shell (1) is provided with an inclined surface (44), and torsion springs (43) are fixedly provided between both sides of the locking block (42) and the support plate (41).

Images