CN114927835B - Lead-acid storage battery electrode group, valve-regulated lead-acid storage battery and preparation method thereof - Google Patents
Lead-acid storage battery electrode group, valve-regulated lead-acid storage battery and preparation method thereof Download PDFInfo
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- CN114927835B CN114927835B CN202210581872.6A CN202210581872A CN114927835B CN 114927835 B CN114927835 B CN 114927835B CN 202210581872 A CN202210581872 A CN 202210581872A CN 114927835 B CN114927835 B CN 114927835B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/531—Electrode connections inside a battery casing
- H01M50/54—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges
- H01M50/541—Connection of several leads or tabs of plate-like electrode stacks, e.g. electrode pole straps or bridges for lead-acid accumulators
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/06—Lead-acid accumulators
- H01M10/12—Construction or manufacture
- H01M10/121—Valve regulated lead acid batteries [VRLA]
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention relates to a lead-acid storage battery pole group, a valve-regulated lead-acid storage battery and a preparation method thereof, belongs to the technical field of lead-acid storage batteries, and solves the problems of high grid corrosion speed, low utilization rate of bottom lead paste and serious upper and lower layering of electrolyte of the existing lead-acid storage battery. The lead-acid storage battery pole group comprises a plurality of pole groups, each pole group comprises a plurality of positive plates, a plurality of negative plates and a plurality of clapboards, the clapboards are arranged between the positive plates and the negative plates, grids of the positive plates or the negative plates comprise an upper frame, a lower frame, a left frame, a right frame, transverse and vertical ribs and transverse single lugs, the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, lug tabs are vertically arranged on the left frame or the right frame, the positive plates and the negative plates are arranged at intervals, the positive lugs and the negative lugs are arranged on the same side of the pole group, the homopolar lugs are connected through buses, and the positive buses and the negative buses are connected to form the pole group. The grids of the electrode group are not easy to corrode, the upper lead paste and the lower lead paste are uniformly utilized, and the upper electrolyte and the lower electrolyte are not easy to delaminate.
Description
Technical Field
The invention relates to the technical field of lead-acid storage batteries, in particular to a lead-acid storage battery pole group, a valve-regulated lead-acid storage battery and a preparation method thereof.
Background
In recent years, the problem of low utilization rate of lead plaster of lead-acid storage batteries is particularly remarkable. In the existing lead-acid storage battery, the length of an upper frame or a lower frame (a wide side) of a polar plate is smaller than that of a side frame (a long side) of the polar plate, a polar lug is arranged on the upper frame generally, the proportion of the long side to the wide side of the polar plate is large, the resistance is continuously increased from the polar lug to the position of the opposite angle farthest from the polar lug, the potential is continuously increased, the current loss flowing to each position is increased, the current is relatively reduced, the charging energy consumption of the battery is improved, and the grid corrosion is accelerated; in addition, the utilization rate of lead plaster at the bottom is reduced due to repeated charge and discharge cycles around the battery, and high-density sulfuric acid is deposited at the bottom continuously, so that electrolyte is layered up and down seriously, and finally the cycle life of the battery is shortened.
Disclosure of Invention
In view of the above analysis, the embodiment of the invention aims to provide a lead-acid storage battery pole group, a valve-regulated lead-acid storage battery and a preparation method thereof, which are used for solving the problems of rapid grid corrosion, low utilization rate of bottom lead paste and serious upper and lower layering of electrolyte of the existing lead-acid storage battery.
In one aspect, embodiments of the present invention provide a lead acid battery pole group comprising a plurality of pole groups, each of the pole groups comprising a plurality of positive plates, a plurality of negative plates, and a plurality of separators disposed between the positive plates and the negative plates; the grid of the positive plate or the negative plate comprises an upper frame, a lower frame, a left frame, a right frame, an inner transverse rib, a vertical rib and a single lug which are transversely arranged, wherein the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, the lug is vertically arranged on the left frame or the right frame, and the positive plate and the negative plate are arranged at intervals; the positive lugs on the positive plate and the negative lugs on the negative plate are arranged on the same side of the electrode group, a plurality of positive lugs are connected through positive bus bars, a plurality of negative lugs are connected through negative bus bars, and a plurality of electrode groups are connected in a mode that the positive bus bars are connected with the negative bus bars to form the electrode group.
Preferably, the positive electrode tab and the negative electrode tab are respectively adjacent to two opposite ends of the separator.
Preferably, a positive electrode column is arranged on the positive busbar at one end of the electrode group, and a negative electrode column is arranged on the negative busbar at the other end of the electrode group.
In a second aspect, the invention also provides a valve-regulated lead-acid battery, which comprises a battery plastic shell and the lead-acid battery pole group; the battery plastic case comprises a groove body with an open upper end and an open side surface, an upper cover matched with the open upper end and a side cover matched with the open side surface, the electrode group is positioned in the groove body, the left frame and the right frame of the positive plate and the negative plate are perpendicular to the bottom of the groove body, and one side of the electrode group, provided with a positive busbar and a negative busbar, faces the open side surface of the groove body.
Preferably, the tank body comprises a plurality of single lattices in one-to-one correspondence with the pole groups, the pole groups are arranged in the single lattices in one-to-one correspondence, and the single lattices are formed by a plurality of separation bars arranged in the tank body.
Preferably, the side cover comprises a side cover main body and a side cover sheet matched with one surface, far away from the groove body, of the side cover main body, one surface, close to the groove body, of the side cover main body is provided with a busbar arrangement groove matched with a positive busbar and a negative busbar, and the positive busbar and the negative busbar are positioned in the busbar arrangement groove.
Preferably, one side of the side cover main body, which is close to the groove body, is further provided with a post bayonet which is matched with the positive post and the negative post respectively, and the positive post and the negative post are positioned in the post bayonet respectively.
Preferably, the side cover main body comprises a side cover wall and a reinforcing rib arranged on one surface, far away from the groove body, of the side cover wall, a baffle glue groove matched with the side edge of the baffle is arranged on one side, close to the groove body, of the side cover wall, and the side edge of the baffle is positioned in the baffle glue groove.
Preferably, the upper cover comprises an upper cover main body and an upper cover plate matched with the upper cover main body, a pole hole and a plurality of valve holes are formed in the upper cover main body, the pole hole corresponds to the pole bayonet, the positive pole and the negative pole respectively penetrate through the pole bayonet to enter the pole hole, and the valve holes correspond to the pole groups one to one.
In a third aspect, the present invention provides a method for preparing a valve-regulated lead-acid battery, for preparing the valve-regulated lead-acid battery, including:
(a) Welding adjacent electrode groups according to the mode that positive bus bars are connected with negative bus bars to form electrode groups, and loading the electrode groups into the groove body according to the mode that the electrode groups are in one-to-one correspondence with single grids;
(b) Mounting a side cover main body, so that a positive bus bar and a negative bus bar are positioned in a bus bar mounting groove, a positive pole post and a negative pole post are respectively positioned in a pole post bayonet, and the side edge of a baffle is positioned in the baffle glue groove and sealed by glue;
(c) Installing an upper cover main body, enabling a pole column hole to correspond to a pole column bayonet, enabling a positive pole column and a negative pole column to penetrate through the pole column bayonet and enter the pole column hole respectively, enabling a plurality of valve holes to correspond to pole groups one by one, and sealing with glue;
(d) And welding terminals on the positive pole and the negative pole, acidifying, and mounting a side cover plate and an upper cover plate.
Compared with the prior art, the invention has at least one of the following beneficial effects:
1. the electrode lugs are arranged on the left frame or the right frame of the polar plate grid, namely, the electrode lugs are transversely arranged on the long side of the grid, so that the conductive ribs are transverse ribs in the grid structure, the conductive ribs are more than those of the polar plate arranged on the upper frame or the lower frame, the conductive transmission distance is shorter, the resistance of each point corresponding to the position from the electrode lugs to the most distal end is less, the electric energy consumed by the current flowing from the electrode lugs to the most distal end is reduced, the conversion rate of the bottom lead paste is higher, the utilization rate and consistency of the upper lead paste and the lower lead paste can be improved to a greater extent (the utilization rate of the upper lead paste and the lower lead paste respectively reaches more than 30 percent at the same time), the bottom high-density sulfuric acid can be consumed more quickly, the deposition speed of the high-density sulfuric acid at the bottom of the battery is slowed down, and the phenomenon that electrolyte of the upper part and the lower part of the battery is severely layered is improved; in addition, as the lugs are arranged on the left frame or the right frame, the current flow direction of the long side where the lugs are positioned is shorter than that of the long side, the charging efficiency of the battery is improved, the side reaction can be reduced, and the grid corrosion (the grid corrosion rate is less than 0.0034 g/h) can be effectively reduced.
2. The utilization rate of the lead plaster at the bottom of each cell of the battery is improved (more than 30%), so that the specific energy of the battery is improved (more than 38 Wh/kg), the cycle life of the battery is prolonged (more than 350 times), the lead plaster used when the existing performance requirement is met is less, and the production cost can be reduced.
3. Compared with the traditional pole group, under the condition of ensuring that the appearance of the battery is unchanged, the pole lugs are arranged on the left frame or the right frame of the grid, and although the effective width of the pole group is reduced, the space remained above the pole plate is large, so that the effective height of the pole group can be increased, and finally, the area of the plate surface of the pole plate in the pole group can be kept unchanged, and the performance of the battery is not reduced due to the change of the structure.
4. The positive lug and the negative lug are respectively close to two opposite ends of the partition board, and the structure of the polarized lug can greatly reduce the length of the pole, reduce the lead consumption of cast welding and avoid the risk of glue climbing of the partition board.
In the invention, the technical schemes can be mutually combined to realize more preferable combination schemes. Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention may be realized and attained by the structure particularly pointed out in the written description and drawings.
Drawings
The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the invention, like reference numerals being used to refer to like parts throughout the several views.
FIG. 1 is a block diagram of a prior art lead acid battery plate;
FIG. 2 is a diagram of a prior art lead acid battery pole group configuration;
FIG. 3 is a discrete block diagram of a prior art lead acid battery;
FIG. 4 is a block diagram of a lead acid battery plate of the present invention;
FIG. 5 is a lead acid battery pole group structure of the present invention;
FIG. 6 is a front view of a lead acid battery pole group of the present invention;
FIG. 7 is a top view of a lead acid battery pole group of the present invention;
FIG. 8 is a discrete block diagram of a battery plastic case of the present invention;
FIG. 9 is a block diagram of a body and a body of a side cover according to the present invention;
FIG. 10 is a discrete block diagram of a lead acid battery of the present invention;
fig. 11 is a grid structure diagram of the lead-acid battery of the present invention.
Reference numerals:
1-positive plate; 2-a negative plate; 3-a separator; 4-positive electrode lugs; 5-negative electrode ear; 6-positive bus bar; 7-negative bus bar; 8-a groove body; 9-positive electrode posts; 10-a negative electrode column; 11-unit cell; 12-separating gear; 13-a side cover body; 14-side flaps; 15-a busbar accommodating groove; 16-post bayonet; 17-side cover walls; 18-reinforcing ribs; 19-a baffle glue groove; 20-a cover slip; 21-an upper cover body; 22-upper cover piece; 23-pole holes; 24-valve hole; 25-tongue mouth at top of groove; 26-tongue mouth of side part of groove; 27-tongue opening at the bottom of the groove body; 28-tongue mouth glue groove; 29-side cover top tongue; 30-safety valve.
Detailed Description
Preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and together with the description serve to explain the principles of the invention, and are not intended to limit the scope of the invention.
In one aspect, the present invention provides a lead acid battery pole group, as shown in fig. 4-7, comprising a plurality of pole groups, each of the pole groups comprising a plurality of positive plates 1, a plurality of negative plates 2, and a plurality of separators 3, the separators 3 being disposed between the positive plates 1 and the negative plates 2; the grid of the positive plate 1 or the negative plate 2 comprises an upper frame, a lower frame, a left frame, a right frame, internal transverse ribs, vertical ribs and a single lug which is transversely arranged, wherein the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, the lug is vertically arranged on the left frame or the right frame, and the positive plate 1 and the negative plate 2 are arranged at intervals; the positive electrode lugs 4 on the positive electrode plate 1 and the negative electrode lugs 5 on the negative electrode plate 2 are arranged on the same side of the electrode group, a plurality of positive electrode lugs 4 are connected through positive bus bars 6, a plurality of negative electrode lugs 5 are connected through negative bus bars 7, and a plurality of electrode groups are connected in a mode that the positive bus bars 6 are connected with the negative bus bars 7 to form the electrode group.
In the invention, the grid of the positive plate 1 or the negative plate 2 comprises an upper frame, a lower frame, a left frame and a right frame, the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, the upper frame, the lower frame, the left frame and the right frame enclose a rectangle, a plurality of vertical ribs for connecting the upper frame and the lower frame and a plurality of transverse ribs for connecting the left frame and the right frame are arranged in the rectangle, and the number of the transverse ribs is larger than that of the vertical ribs, as shown in fig. 11.
That is, the lengths of the upper frame and the lower frame of the grid of the positive electrode plate 1 or the negative electrode plate 2 are smaller than those of the left frame and the right frame, and the extending direction of the tab is parallel to the upper frame or the lower frame relative to the upper frame or the lower frame, which can be understood that the tab is transversely arranged on the left frame or the right frame.
Compared with the prior art, the electrode lugs are arranged on the left frame or the right frame of the polar plate grid, namely, the electrode lugs are transversely arranged on the long side of the grid, so that the conductive ribs are transverse ribs in the grid structure, the conductive ribs are more than the conductive ribs of the polar plate arranged on the upper frame or the lower frame of the electrode lugs, the conductive transmission distance is shorter, the resistance from the electrode lugs to corresponding points at the most distal end is smaller, the electric energy consumed by current flowing from the electrode lugs to the most distal end is reduced, the grid corrosion is slowed down, the conversion rate of lead paste at the bottom is higher, the utilization rate and consistency of the lead paste at the top and the bottom can be improved to a greater extent, the high-density sulfuric acid at the bottom of the battery can be consumed more rapidly, the deposition speed of the high-density sulfuric acid at the bottom of the battery is slowed down, and the phenomenon that electrolyte of the upper part and the lower part of the battery is layered seriously is improved. The invention improves the utilization rate of the lead plaster at the bottom of the battery, thereby improving the specific energy of the battery, prolonging the cycle life of the battery, reducing the lead plaster used when the existing performance requirement is met, and reducing the production cost. In addition, compare with traditional utmost point group, under the unchangeable circumstances of assurance battery appearance, the utmost point ear sets up at the left frame or the right frame (long limit) of grid, though make the effective width of utmost point crowd reduce, but the space that remains in utmost point crowd is very big for the effective height of utmost point crowd can become big, finally, the face area of polar plate in the utmost point crowd can remain unchanged, can not lead to battery performance to drop because of changing the structure.
The positive electrode tab 4 and the negative electrode tab 5 are respectively adjacent to two opposite ends of the separator 3. That is, the polar lug is vertically arranged at one end of the left frame or the right frame of the polar plate, namely, the polar lug is vertically arranged at one end of the left frame or the right frame, which is close to the upper frame or the lower frame, and the polar lug structure can greatly reduce the length of the polar post, reduce the lead consumption of cast welding and avoid the risk of glue climbing of the partition plate.
Illustratively, the positive busbar 6 at one end of the pole group is provided with a positive pole 9 and the negative busbar 7 at the other end of the pole group is provided with a negative pole 10. The positive electrode column 9 and the negative electrode column 10 are used for external connection.
In a second aspect, the present invention provides a valve-regulated lead-acid battery, as shown in fig. 8-10, comprising a battery plastic case and the above-mentioned lead-acid battery pole group; the battery plastic case comprises a groove body 8 with an open upper end and an open side surface, an upper cover matched with the open upper end and a side cover matched with the open side surface, the electrode group is positioned in the groove body 8, the left side frame and the right side frame of the positive plate 1 and the negative plate 2 are perpendicular to the bottom of the groove body 8, and one side of the electrode group, provided with the positive busbar 6 and the negative busbar 7, faces the open side surface of the groove body 8.
Compared with the prior art, the lug of the valve-controlled lead-acid storage battery is arranged on the left frame or the right frame (long side) of the grid, namely, the lug of the valve-controlled lead-acid storage battery is transversely arranged on the long side of the polar plate, so that the conductive ribs are transverse ribs in the grid structure, the conductive ribs of the valve-controlled lead-acid storage battery are more than those of the polar plate arranged on the upper frame or the lower frame of the lug, the conductive transmission distance is shorter, the resistance from the lug to the corresponding point at the most distal end is smaller, the electric energy consumed by current flowing from the lug to the most distal end is reduced, the grid corrosion is slowed down, the conversion rate of lead paste at the bottom is higher, the utilization rate and consistency of lead paste at the top and bottom can be improved to a greater extent, the high-density sulfuric acid at the bottom of the battery can be consumed more quickly, the deposition speed of the high-density sulfuric acid at the bottom of the battery is slowed down, and the phenomenon that electrolyte layering at the upper part and the bottom part of the battery is serious is improved. The invention improves the utilization rate of the lead plaster at the bottom of the battery, thereby improving the specific energy of the battery, prolonging the cycle life of the battery, reducing the lead plaster used when the existing performance requirement is met, and reducing the production cost. In addition, compare with traditional battery, under the unchangeable circumstances of assurance battery appearance, the utmost point ear sets up at the left frame or the right frame of grid, though make the effective width of utmost point crowd reduce, but the space that remains in top of polar plate is very big for the effective height of utmost point crowd can become big, and finally, the face area of polar plate in the utmost point crowd can remain unchanged, can not lead to battery performance to drop because of changing the structure.
Illustratively, the battery can is generally quadrangular.
In the present invention, the tank body 8 includes a plurality of unit cells 11 corresponding to the pole groups one by one, the pole groups are disposed in the unit cells 11 in one by one correspondence, and the unit cells 11 are formed by a plurality of barrier ribs 12 disposed in the tank body 8.
In order to improve the adaptability of the groove body 8 to the upper cover and the side cover during assembly, the joint of the groove body 8 and the upper cover and the side cover is provided with a tongue mouth structure, and specifically, the tongue mouth structure comprises a groove body top tongue mouth 25, a groove body side tongue mouth 26 and a groove body bottom tongue mouth 27.
In the invention, the side cover comprises a side cover main body 13 and a side cover sheet 14 matched with one surface of the side cover main body 13 far away from the groove body 8, one surface of the side cover main body 13 near the groove body 8 is provided with a busbar accommodating groove 15 matched with the positive busbar 6 and the negative busbar 7, and the positive busbar 6 and the negative busbar 7 are positioned in the busbar accommodating groove 15. In order to improve the stability of the positive and negative bus bars 6 and 7 in the bus bar seating groove 15, the positive and negative bus bars 6 and 7 are fixed in the bus bar seating groove 15 with glue.
The side cover main body 13 is provided with a tongue mouth glue groove 28 which is matched with the tongue mouth 26 at the side part of the groove body and the tongue mouth 27 at the bottom of the groove body respectively. The side tongue opening 26 and the bottom tongue opening 27 are positioned in the tongue opening glue groove 28. In order to improve the stability of the side tongue opening 26 and the bottom tongue opening 27 of the tank body, the side tongue opening 26 and the bottom tongue opening 27 of the tank body are fixed in a tongue opening glue groove 28 by glue.
In the invention, a post bayonet 16 respectively matched with the positive post 9 and the negative post 10 is further arranged on one surface of the side cover main body 13 close to the groove body 8, and the positive post 9 and the negative post 10 are respectively positioned in the post bayonet 16. The post bayonet 16 is used to secure the post in place with the cap.
In the invention, the side cover main body 13 comprises a side cover wall 17 and a reinforcing rib 18 arranged on one surface of the side cover wall 17 away from the groove body 8, wherein a baffle glue groove 19 matched with the side edge of the baffle 12 is arranged on one side of the side cover wall 17 close to the groove body 8, and the side edge of the baffle 12 is positioned in the baffle glue groove 19. In order to improve the stability of the side edges of the barrier 12 in the barrier glue groove 19, the side edges of the barrier 12 are fixed in the barrier glue groove 19 with glue. The side cover main body 13 is connected with the baffle 12 through a baffle glue groove 19, so that sealing among the single lattices 11 in the groove body 8 is ensured; the reinforcing ribs 18 and the side cover walls 17 together play a role in supporting the battery pole group, reducing damage of the lateral acting force to the positive and negative lugs, reducing lateral expansion of the pole plates and reducing lateral impact force caused by other batteries in the movement process.
The reinforcing ribs 18 comprise a plurality of vertical reinforcing ribs parallel to the polar plates and a plurality of transverse reinforcing ribs perpendicular to the polar plates, the vertical reinforcing ribs and the transverse reinforcing ribs are perpendicularly intersected, the transverse reinforcing ribs play a role in supporting and protecting polar groups, and the vertical reinforcing ribs play a role in reinforcing the transverse reinforcing ribs.
Further, the busbar accommodating groove 15, the tongue glue groove 28 and the baffle glue groove 19 are mutually communicated, which is favorable for glue dispersion and can prevent the overflow glue from being adsorbed to the polar group baffle when the battery is sealed.
Illustratively, the side cover body 13 is provided with a cover slide 20 matching the side cover 14 on a side thereof remote from the slot 8, the edge of the side cover 14 being located within the cover slide 20. Specifically, the cover slide 20 is disposed on the upper and lower frames of the side cover main body 13. The cover slide 20 is used to conveniently and quickly insert the side cover 14 sideways into the side cover body 13 and to mate the side cover 14 with the side cover body 13 without falling out.
In view of the suitability of the side cover and the upper cover at the time of assembly, it is preferable that the tongue structure is provided at the position where the side cover main body 13 is assembled and connected with the upper cover. Specifically, a side cover top tongue 29 is provided on the top of the side cover main body 13.
In the invention, the upper cover comprises an upper cover main body 21 and an upper cover piece 22 matched with the upper cover main body 21, wherein a pole hole 23 and a plurality of valve holes 24 are arranged on the upper cover main body 21, the pole hole 23 corresponds to the pole bayonet 16, the positive pole 9 and the negative pole 10 respectively penetrate through the pole bayonet 16 and enter the pole hole 23, and the plurality of valve holes 24 correspond to the pole group one by one.
Specifically, a groove is formed in the upper surface of the upper cover main body 21, notches are formed in two opposite ends of the groove, a plurality of valve holes 24 are uniformly formed in the groove along the same direction, matched safety valves 30 are installed on the valve holes 24, the number of the valve holes 24 and the number of the safety valves 30 are the same as that of the single cells 11, and the positions of the valve holes 24 correspond to the single cells one by one, so that the effect of exhausting and decompressing the single cells 11 of the battery is achieved; the upper cover plate 22 is matched with the groove, the upper surface of the upper cover plate 22 is flush with the upper surface of the upper cover main body 21 after being installed by ultrasonic welding; the upper cover main body 21 sets up the breach with upper cover piece 22 cooperation department, and the gas that produces when the battery charges reaches certain pressure, can jack up relief valve 30, and through relief valve 30, discharge from the breach department at recess both ends, avoid the battery to bulge because of the internal pressure is too big.
The bottom of the upper cover main body 21 is provided with glue grooves corresponding to the upper edges of the groove body top tongue opening 25, the side cover top tongue opening 29 and the separation block 12, and the upper edges of the groove body top tongue opening 25, the side cover top tongue opening 29 and the separation block 12 are respectively matched with the glue grooves of the upper cover main body 21 and sealed by epoxy resin glue to prevent the damage to the user equipment caused by the electrolyte outflow.
Further, the positive electrode post 9 is connected with a positive electrode terminal, and the negative electrode post 10 is connected with a negative electrode terminal; the identification of the positive terminal is red, and the identification of the negative terminal is blue or black; electrolyte meeting process requirements is contained in the battery; the positive terminal and the negative terminal of the battery adopt screw terminals, the diameter of the valve hole 24 is 8mm or 10mm, and the problem that the acid liquor in the acid kettle is difficult to drop caused by bubbles generated in the formation process can be reduced.
In a third aspect, the present invention further provides a method for preparing a valve-regulated lead-acid battery, for preparing the valve-regulated lead-acid battery, including:
(a) Welding adjacent electrode groups in a mode that a positive busbar 6 is connected with a negative busbar 7 to form electrode groups, and loading the electrode groups into the groove body 8 in a mode that the electrode groups are in one-to-one correspondence with the single cells 11;
(b) The side cover main body 13 is installed, so that the positive bus bar 6 and the negative bus bar 7 are positioned in the bus bar arranging groove 15, the positive pole 9 and the negative pole 10 are respectively positioned in the pole bayonet 16, and the side edge of the baffle 12 is positioned in the baffle glue groove 19 and sealed by glue;
(c) The upper cover main body 21 is installed, so that the pole column holes 23 correspond to the pole column bayonets 16, the positive pole column 9 and the negative pole column 10 respectively penetrate through the pole column bayonets 16 to enter the pole column holes 23, the plurality of valve holes 24 correspond to the pole groups one by one, and the pole groups are sealed by glue;
(d) Terminals are welded to the positive electrode post 9 and the negative electrode post 10, and the side cover piece 14 and the upper cover piece 22 are attached by acidification.
Specifically, (1) pole group enters the groove: welding adjacent electrode groups according to the mode that the positive busbar 6 is connected with the negative busbar 7 to form electrode groups, pressing the cast-welded electrode groups into the groove body 8 through cast-welding equipment according to the mode that the electrode groups are in one-to-one correspondence with the single lattices 11, wherein the pressure of the cast-welding equipment meets the conventional process requirements in the field so as to prevent the electrode groups from entering the groove in place or being crushed;
(2) and (3) glue preparation: the preparation proportion of the sealant or the primer is as the main agent: curing agent = 100:50 (+/-2), using a dispensing machine or manually stirring for 1-2 minutes; the preparation proportion of the color gel is generally as the main agent: curing agent = 100:45 (±2), using a dispenser or manually stirring for 2-3 minutes; or sealing terminal holes and marking polar colors by using a complex of primer and color glue (primer-color integrated glue), wherein the preparation proportion is the same as that of the color glue;
(3) mounting the side cover main body 13 and sealing: the pole group is cast-welded into a groove to obtain a cast-welded semi-finished product, and the side cover main body 13 is installed and sealed; firstly, adding sealant with technological dosage into a baffle glue groove 19, a busbar accommodating groove 15 and a tongue mouth glue groove 28 of a side cover main body 13, then inverting the side cover main body 13, turning the glue groove upwards, turning a cast-weld semi-finished product, and buckling the cast-weld semi-finished product into the side cover main body 13, so that the side edges of a busbar, a baffle 12, a groove body side tongue mouth 26 and a groove body bottom tongue mouth 27 are matched with corresponding glue grooves, good sealing is ensured, the sealant cannot overflow to influence the attractiveness, and the leakage sealing of a battery cannot be seriously caused by less sealant; the positive pole 9 and the negative pole 10 are respectively matched with a pole bayonet 16 on the side cover main body 13, so that glue cannot overflow from the poles; the battery buckled with the side cover main body 13 is put into an oven with the temperature of 55-70 ℃ for curing, the curing time is more than or equal to 90 minutes, and the temperature of the oven can be actually adjusted according to the ambient temperature;
(4) the upper cover body 21 is mounted and sealed: the battery after the side cover main body 13 is sealed enters the mounting upper cover main body 21 and is sealed; firstly, inverting the upper cover main body 21, adding sealant into a sealant groove according to the process dosage, and then inverting the battery completed in the step (3), buckling the cover, wherein the temperature and the hardening time of an oven are the same as those of the sealing step of the side cover main body 13;
(5) welding terminals: the battery after the sealing of the upper cover main body 21 is welded with a terminal, a threaded terminal or a wiring lug required by the corresponding battery model is arranged in the pole hole 23 and matched with the terminal, and the terminal is welded by an electric soldering iron or oxygen arc welding, so that the welded terminal is firm, and the situation that the battery cannot be connected with an external power supply or a load due to the infirm welding of the terminal is avoided, and the function is lost;
(6) coloring glue: adding a technological amount of terminal integral adhesive into the post hole 23 after terminal welding is completed; or adding primer, and adding color glue after the primer is hardened; after the colored glue is added, curing is carried out in an oven at 55-65 ℃ for more than or equal to 60 minutes, the highest position of the cured colored glue is leveled with the edge of the pole hole 23, the colored glue is concave, and finally the dry battery is obtained;
(7) acidification to: electrolyte with the density and the dosage required by the process is added into the battery plastic shell of the dry battery from the valve hole 24, and the electrolyte comprises concentrated sulfuric acid, pure water, anhydrous sodium sulfate, colloid additives, dedong colloid (or silicon dioxide) and other components; acid is added into the dry battery by adopting vacuum negative pressure, so that the diffusion of electrolyte in the separator is accelerated; the battery after the acid addition is finished enters a cooling water tank at the highest speed for wire connection formation;
(8) the qualified battery after formation is covered with a safety valve with a specified size at the valve hole 24 to prevent the polar plate from being oxidized after long-term exposure to air; the residual acid on the surface of the battery is removed through cleaning, then ultrasonic waves or chloroform are used for firmly combining the upper cover plate 22 with the groove on the upper cover main body 21, and the side cover 14 is inserted into the side cover main body 13 through the cover slide 20, so that the valve-regulated lead-acid battery with the corresponding model is obtained.
The preparation method of the valve-controlled lead-acid storage battery is simple, the prepared valve-controlled lead-acid storage battery grid is not easy to corrode, the utilization rate of the lead paste at the upper part and the lower part is uniform, and the upper electrolyte and the lower electrolyte are not easy to delaminate.
Example 1
The lead-acid storage battery pole group comprises a plurality of pole groups, each pole group comprises a plurality of positive plates 1, a plurality of negative plates 2 and a plurality of separators 3, grids of the positive plates 1 or the negative plates 2 comprise an upper frame, a lower frame, a left frame, a right frame and a single lug which is transversely arranged, the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, the lugs are vertically arranged on the left frame or the right frame, the positive plates 1 and the negative plates 2 are arranged at intervals, the separators 3 are arranged between the positive plates 1 and the negative plates 2, positive lugs 4 on the positive plates 1 and negative lugs 5 on the negative plates 2 are arranged on the same side of the pole groups, a plurality of positive lugs 4 are connected through positive buses 6, a plurality of negative lugs 5 are connected through negative buses 7, and a plurality of pole groups are connected in a mode of connecting positive buses 6 and negative buses 7; a positive electrode column 9 is arranged on the positive busbar 6 at one end of the electrode group, and a negative electrode column 10 is arranged on the negative busbar 7 at the other end of the electrode group; the positive electrode tab 4 and the negative electrode tab 5 are respectively adjacent to two opposite ends of the separator 3.
Example 2
A valve-regulated lead-acid battery comprising a battery plastic casing and the lead-acid battery pole group of example 1; the battery plastic case comprises a groove body 8 with an open upper end and an open side surface, an upper cover matched with the open upper end and a side cover matched with the open side surface, the pole group is positioned in the groove body 8, the long sides of the positive plate 1 and the negative plate 2 are perpendicular to the bottom of the groove body 8, and one side of the pole group, provided with the positive busbar 6 and the negative busbar 7, is open towards the side surface of the groove body 8. The battery plastic shell is in a quadrangular prism shape as a whole. The tank body 8 comprises a plurality of single cells 11 which are in one-to-one correspondence with the pole groups, the pole groups are arranged in the single cells 11 in one-to-one correspondence, and the single cells 11 are formed by a plurality of separation blocks 12 arranged in the tank body 8. The joint of the groove body 8 and the upper cover and the side cover is provided with a groove body top tongue opening 25, a groove body side tongue opening 26 and a groove body bottom tongue opening 27. The side cover comprises a side cover main body 13 and a side cover piece 14 matched with one surface, far away from the groove body 8, of the side cover main body 13, one surface, close to the groove body 8, of the side cover main body 13 is provided with a busbar accommodating groove 15 matched with the positive busbar 6 and the negative busbar 7, and the positive busbar 6 and the negative busbar 7 are positioned in the busbar accommodating groove 15. The side cover main body 13 is provided with a tongue mouth glue groove 28 which is matched with the tongue mouth 26 at the side part of the groove body and the tongue mouth 27 at the bottom of the groove body respectively. The side tongue opening 26 and the bottom tongue opening 27 are positioned in the tongue opening glue groove 28. One side of the side cover main body 13, which is close to the groove body 8, is also provided with a pole bayonet 16 which is respectively matched with the positive pole 9 and the negative pole 10, and the positive pole 9 and the negative pole 10 are respectively positioned in the pole bayonet 16. The side cover main body 13 comprises a side cover wall 17 and a reinforcing rib 18 arranged on one surface of the side cover wall 17 far away from the groove body 8, a baffle glue groove 19 matched with the side edge of the baffle 12 is arranged on one side of the side cover wall 17 close to the groove body 8, and the side edge of the baffle 12 is positioned in the baffle glue groove 19. The reinforcing ribs 18 comprise a plurality of vertical reinforcing ribs parallel to the polar plates and a plurality of transverse reinforcing ribs perpendicular to the polar plates, the vertical reinforcing ribs and the transverse reinforcing ribs are perpendicularly intersected, the transverse reinforcing ribs play a role in supporting and protecting polar groups, and the vertical reinforcing ribs play a role in reinforcing the transverse reinforcing ribs. The busbar accommodating groove 15, the tongue gum groove 28 and the baffle gum groove 19 are communicated with each other. The side cover main body 13 is provided with a cover slide 20 matched with the side cover 14 on the side far away from the groove body 8, and the edge of the side cover 14 is positioned in the cover slide 20. The top of the side cover main body 13 is provided with a side cover top tongue opening 29 at the position where the top is assembled and connected with the upper cover. The upper cover comprises an upper cover main body 21 and an upper cover plate 22 matched with the upper cover main body 21, a pole hole 23 and a plurality of valve holes 24 are formed in the upper cover main body 21, the pole hole 23 corresponds to the pole bayonet 16, the positive pole 9 and the negative pole 10 respectively penetrate through the pole bayonet 16 to enter the pole hole 23, and the valve holes 24 correspond to the pole groups one by one. The upper surface of upper cover main part 21 is provided with the recess, is provided with the breach at the opposite both ends of recess, evenly is provided with a plurality of valve openings 24 along same direction in the recess, installs supporting relief valve 30 on the valve opening 24, and the quantity of valve opening 24 and relief valve 30 is the same with the quantity of single check 11 to the position and the single check one-to-one of valve opening 24. The upper cover plate 22 is matched with the groove, the upper surface of the upper cover plate 22 is flush with the upper surface of the upper cover main body 21 after being installed by ultrasonic welding; a notch is arranged at the matching position of the upper cover main body 21 and the upper cover piece 22. The bottom of the upper cover main body 21 is provided with glue grooves corresponding to the upper edges of the groove body top tongue opening 25, the side cover top tongue opening 29 and the partition 12, and the upper edges of the groove body top tongue opening 25, the side cover top tongue opening 29 and the partition 12 are respectively matched with the glue grooves of the upper cover main body 21 and sealed by epoxy resin glue. The positive electrode post 9 is connected to a positive electrode terminal, and the negative electrode post 10 is connected to a negative electrode terminal. The positive terminal is marked red, and the negative terminal is marked blue or black. The battery contains electrolyte meeting the technological requirements.
Example 3
A preparation method of a valve-regulated lead-acid battery comprises the following steps:
(1) the pole group enters the groove: welding adjacent electrode groups according to the mode that the positive busbar 6 is connected with the negative busbar 7 to form electrode groups, pressing the cast-welded electrode groups into the groove body 8 through cast-welding equipment according to the mode that the electrode groups are in one-to-one correspondence with the single lattices 11, wherein the pressure of the cast-welding equipment meets the conventional process requirements in the field so as to prevent the electrode groups from entering the groove in place or being crushed;
(2) and (3) glue preparation: the preparation proportion of the sealant or the primer is as the main agent: curing agent = 100:50 (+/-2), using a dispensing machine or manually stirring for 1-2 minutes; the preparation proportion of the color gel is generally as the main agent: curing agent = 100:45 (±2), using a dispenser or manually stirring for 2-3 minutes; or sealing terminal holes and marking polar colors by using a complex of primer and color glue (primer-color integrated glue), wherein the preparation proportion is the same as that of the color glue;
(3) mounting the side cover main body 13 and sealing: the pole group is cast-welded into a groove to obtain a cast-welded semi-finished product, and the side cover main body 13 is installed and sealed; firstly, adding sealant with technological dosage into a baffle glue groove 19, a busbar accommodating groove 15 and a tongue mouth glue groove 28 of a side cover main body 13, then inverting the side cover main body 13, turning the glue groove upwards, turning a cast-weld semi-finished product, and buckling the cast-weld semi-finished product into the side cover main body 13, so that the side edges of a busbar, a baffle 12, a groove body side tongue mouth 26 and a groove body bottom tongue mouth 27 are matched with corresponding glue grooves, good sealing is ensured, the sealant cannot overflow to influence the attractiveness, and the leakage sealing of a battery cannot be seriously caused by less sealant; the positive pole 9 and the negative pole 10 are respectively matched with a pole bayonet 16 on the side cover main body 13, so that glue cannot overflow from the poles; the battery buckled with the side cover main body 13 is put into an oven with the temperature of 55-70 ℃ for curing, the curing time is more than or equal to 90 minutes, and the temperature of the oven can be actually adjusted according to the ambient temperature;
(4) the upper cover body 21 is mounted and sealed: the battery after the side cover main body 13 is sealed enters the mounting upper cover main body 21 and is sealed; firstly, inverting the upper cover main body 21, adding sealant into a sealant groove according to the process dosage, and then inverting the battery completed in the step (3), buckling the cover, wherein the temperature and the hardening time of an oven are the same as those of the sealing step of the side cover main body 13;
(5) welding terminals: the battery after the sealing of the upper cover main body 21 is welded with a terminal, a threaded terminal or a wiring lug required by the corresponding battery model is arranged in the pole hole 23 and matched with the terminal, and the terminal is welded by an electric soldering iron or oxygen arc welding, so that the welded terminal is firm, and the situation that the battery cannot be connected with an external power supply or a load due to the infirm welding of the terminal is avoided, and the function is lost;
(6) coloring glue: adding a technological amount of terminal integral adhesive into the post hole 23 after terminal welding is completed; or adding primer, and adding color glue after the primer is hardened; after the colored glue is added, curing is carried out in an oven at 55-65 ℃ for more than or equal to 60 minutes, the highest position of the cured colored glue is leveled with the edge of the pole hole 23, the colored glue is concave, and finally the dry battery is obtained;
(7) acidification to: electrolyte with the density and the dosage required by the process is added into the battery plastic shell of the dry battery from the valve hole 24, and the electrolyte comprises concentrated sulfuric acid, pure water, anhydrous sodium sulfate, colloid additives, dedong colloid (or silicon dioxide) and other components; acid is added into the dry battery by adopting vacuum negative pressure, so that the diffusion of electrolyte in the separator is accelerated; the battery after the acid addition is finished enters a cooling water tank at the highest speed for wire connection formation;
(8) the qualified battery after formation is covered with a safety valve with a specified size at the valve hole 24 to prevent the polar plate from being oxidized after long-term exposure to air; the residual acid on the surface of the battery is removed through cleaning, then ultrasonic waves or chloroform are used for firmly combining the upper cover plate 22 with the groove on the upper cover main body 21, and the side cover 14 is inserted into the side cover main body 13 through the cover slide 20, so that the valve-regulated lead-acid battery with the corresponding model is obtained.
The valve-controlled lead-acid storage battery of the embodiment 2 and the valve-controlled lead-acid storage battery prepared in the embodiment 3 are subjected to charge and discharge tests, and the valve-controlled lead-acid storage battery grid corrosion rate of the embodiment 2 is 0.0026g/h, the utilization rates of the upper lead plaster and the lower lead plaster are uniform, the utilization rates of the upper lead plaster and the lower lead plaster are 34%, the upper electrolyte and the lower electrolyte are not obviously layered, and the cycle life of the battery is 396 times; the grid corrosion rate of the valve-regulated lead-acid storage battery prepared in the embodiment 3 is 0.0029g/h, the utilization rates of the lead pastes at the upper part and the lower part are uniform, the utilization rates of the lead pastes at the upper part and the lower part are 34.5%, the electrolyte at the upper part and the electrolyte at the lower part are not obviously layered, and the cycle life of the battery is 383 times.
The present invention is not limited to the above-mentioned embodiments, and any changes or substitutions that can be easily understood by those skilled in the art within the technical scope of the present invention are intended to be included in the scope of the present invention.
Claims (9)
1. The valve-controlled lead-acid storage battery is characterized by comprising a battery plastic shell and a lead-acid storage battery pole group;
the lead-acid storage battery pole group comprises a plurality of pole groups, each pole group comprises a plurality of positive plates (1), a plurality of negative plates (2) and a plurality of separators (3), and the separators (3) are arranged between the positive plates (1) and the negative plates (2);
the grid of the positive plate (1) or the negative plate (2) comprises an upper frame, a lower frame, a left frame, a right frame, transverse ribs, vertical ribs and single lugs which are transversely arranged, wherein the lengths of the upper frame and the lower frame are smaller than those of the left frame and the right frame, the lugs are vertically arranged on the left frame or the right frame, and the positive plate (1) and the negative plate (2) are arranged at intervals;
the positive lugs (4) on the positive plate (1) and the negative lugs (5) on the negative plate (2) are arranged on the same side of the electrode group, a plurality of positive lugs (4) are connected through positive bus bars (6), a plurality of negative lugs (5) are connected through negative bus bars (7), and a plurality of electrode groups are connected in a mode that the positive bus bars (6) are connected with the negative bus bars (7) to form the electrode group;
the battery plastic case comprises a groove body (8) with an open upper end and an open side surface, an upper cover matched with the open upper end and a side cover matched with the open side surface, the pole group is positioned in the groove body (8), the left side frame and the right side frame of the positive plate (1) and the negative plate (2) are perpendicular to the bottom of the groove body (8), and one side of the pole group, provided with a positive busbar (6) and a negative busbar (7), faces the open side surface of the groove body (8).
2. The valve-regulated lead-acid battery according to claim 1, wherein the positive tab (4) and the negative tab (5) are respectively adjacent to two opposite ends of the separator (3).
3. The valve-regulated lead-acid battery according to claim 2, wherein a positive post (9) is provided on the positive busbar (6) at one end of the pole group, and a negative post (10) is provided on the negative busbar (7) at the other end of the pole group.
4. A valve-regulated lead acid battery according to claim 3, wherein the tank (8) comprises a plurality of cells (11) in one-to-one correspondence with a group of poles, the group of poles being disposed in the cells (11), the cells (11) being formed by a plurality of spacers (12) disposed in the tank (8).
5. The valve-regulated lead-acid battery according to claim 4, wherein the side cover comprises a side cover main body (13) and a side cover sheet (14) matched with the side of the side cover main body (13) away from the tank body (8), a bus bar placement groove (15) matched with the positive bus bar (6) and the negative bus bar (7) is arranged on the side of the side cover main body (13) close to the tank body, and the positive bus bar (6) and the negative bus bar (7) are positioned in the bus bar placement groove (15).
6. The valve-regulated lead-acid battery according to claim 5, wherein a post bayonet (16) respectively matched with the positive post (9) and the negative post (10) is further arranged on one surface of the side cover main body (13) close to the groove body, and the positive post (9) and the negative post (10) are respectively positioned in the post bayonet (16).
7. The valve-regulated lead-acid battery according to claim 6, wherein the side cover main body (13) comprises a side cover wall (17) and a reinforcing rib (18) arranged on one surface of the side cover wall (17) far away from the groove body (8), a baffle glue groove (19) matched with the side edge of the baffle (12) is arranged on one side of the side cover wall (17) close to the groove body (8), and the side edge of the baffle (12) is positioned in the baffle glue groove (19).
8. The valve-controlled lead-acid battery according to claim 7, wherein the upper cover comprises an upper cover main body (21) and an upper cover plate (22) matched with the upper cover main body (21), a pole hole (23) and a plurality of valve holes (24) are formed in the upper cover main body (21), the pole hole (23) corresponds to the pole bayonet (16), the positive pole (9) and the negative pole (10) respectively penetrate through the pole bayonet (16) to enter the pole hole (23), and the valve holes (24) correspond to the pole groups one by one.
9. A method of preparing a valve-regulated lead acid battery according to claim 8, comprising:
(a) Welding adjacent electrode groups according to the mode that a positive busbar (6) is connected with a negative busbar (7) to form electrode groups, and loading the electrode groups into a groove body (8) according to the mode that the electrode groups are in one-to-one correspondence with single lattices (11);
(b) The side cover main body (13) is installed, so that the positive bus bar (6) and the negative bus bar (7) are positioned in the bus bar arranging groove (15), the positive pole post (9) and the negative pole post (10) are respectively positioned in the pole post bayonet (16), and the side edge of the baffle (12) is positioned in the baffle glue groove (19) and sealed by glue;
(c) The upper cover main body (21) is installed, so that the pole column holes (23) correspond to the pole column bayonets (16), the positive pole column (9) and the negative pole column (10) respectively penetrate through the pole column bayonets (16) to enter the pole column holes (23), the valve holes (24) correspond to the pole groups one by one, and the valve holes are sealed by glue;
(d) And welding terminals on the positive pole (9) and the negative pole (10), acidifying, and mounting a side cover plate (14) and an upper cover plate (22).
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| CN202210581872.6A CN114927835B (en) | 2022-05-26 | 2022-05-26 | Lead-acid storage battery electrode group, valve-regulated lead-acid storage battery and preparation method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2517117Y (en) * | 2001-12-24 | 2002-10-16 | 吴捷 | Valve control lead-acid battery |
| CN202996988U (en) * | 2012-12-17 | 2013-06-12 | 湖南丰日电源电气股份有限公司 | High-performance lead-acid storage battery structure |
| CN106532064A (en) * | 2016-12-02 | 2017-03-22 | 天津市德泰隆科技股份有限公司 | Low lead-acid storage battery |
| CN209804827U (en) * | 2019-03-13 | 2019-12-17 | 江西长新电源有限公司 | Lead-acid storage battery capable of avoiding acid stratification |
| CN113437304A (en) * | 2021-06-18 | 2021-09-24 | 风帆有限责任公司 | Storage battery grid with offset tabs |
| CN114725531A (en) * | 2022-04-08 | 2022-07-08 | 超威电源集团有限公司 | Valve-regulated lead-acid storage battery pole group and manufacturing method thereof |
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