A battery

Abstract

This utility model discloses a storage battery applicable to the battery field, comprising an electrode assembly, a busbar, terminals, electrolyte, and a battery casing. Several annular grooves are axially arranged on the outer circumferential surface of the terminals. Anti-corrosion layers are provided on the outer circumferential surface of the terminals, the surface of the busbar facing the terminals, and the outer circumferential surface of the busbar. The portion of the terminals extending into the terminal holes in the battery casing is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive in the direction pointing outwards from the battery casing. The battery casing is provided with a gas vent valve, and a catalyst is placed inside the battery casing near the gas vent valve. This utility model reduces battery water loss by placing a catalyst inside the battery casing near the gas vent valve. By providing anti-corrosion layers on the surfaces of the terminals and busbar, providing annular grooves on the terminal surface, and sealing the terminals to the battery casing, it reduces acid creep and corrosion of the electrolyte.

Description

Technical Field

[0001] This utility model relates to the field of batteries, and in particular to a storage battery. Background Technology

[0002] Regarding the issue of requiring air conditioning in computer rooms when lead-acid batteries are in operation, in order to adapt to the low-carbon development plan, it is necessary to reduce the configuration of computer room air conditioning, reduce the frequency of air conditioning use, and increase the ambient temperature for lead-acid battery operation. However, when the ambient temperature rises, it will accelerate the electrochemical reaction in the lead-acid battery, leading to water loss. Water loss increases the density of the electrolyte in the battery, accelerates the corrosion of the busbar, and causes the busbar to become thinner or break. At the same time, the electrolyte will climb up the terminals and corrode the terminal surface, affecting the battery's performance and lifespan.

[0003] Therefore, how to reduce the corrosion of the busbar and terminals by the electrolyte under high temperature conditions, and how to avoid battery capacity reduction and damage, are technical problems that urgently need to be solved by those skilled in the art. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a storage battery that solves the problem in the prior art that when the ambient temperature rises, the electrochemical reaction in the lead-acid battery is accelerated, leading to water loss in the lead-acid battery. Water loss in the lead-acid battery increases the density of the electrolyte in the battery, accelerates the corrosion of the busbar, and causes the busbar to become thinner or break. At the same time, the electrolyte climbs up the terminal post and corrodes the surface of the terminal post, affecting the performance and life of the battery.

[0005] To solve the above-mentioned technical problems, this utility model provides a storage battery, comprising:

[0006] Electrode assembly, busbar, terminal post and electrolyte, and battery casing for holding the electrode assembly, the busbar, the terminal post and the electrolyte;

[0007] One end of the busbar is connected to the electrode group assembly, and the other end of the busbar is connected to the electrode post. Several annular grooves are provided along the axial direction on the outer circumferential surface of the electrode post. On the outer circumferential surface of the electrode post, the surface of the busbar facing the electrode post and the outer circumferential surface of the busbar are all provided with anti-corrosion layers.

[0008] The battery casing has a terminal hole, and the portion of the terminal extending into the terminal hole is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive in the direction pointing outward from the battery casing.

[0009] The electrode assembly includes alternating positive and negative electrode plates, and a diaphragm disposed between the positive and negative electrode plates. The positive electrode plate includes a positive electrode grid and positive lead paste cured on the positive electrode grid. The negative electrode plate includes a negative electrode grid and negative lead paste cured on the negative electrode grid.

[0010] The battery casing is provided with a gas vent valve, and a catalyst is provided inside the battery casing near the gas vent valve.

[0011] Optionally, a catalyst placement chamber is provided inside the battery casing, one end of which is connected to the inside of the battery casing, and the other end of which is connected to the gas discharge valve.

[0012] The catalyst is placed inside the catalyst placement chamber.

[0013] Optionally, both the positive electrode grid and the negative electrode grid include a frame and ribs arranged in a grid pattern within the frame;

[0014] Both the frame and the ribs contain crystal nucleating agents.

[0015] Optionally, a vulcanized rubber sleeve is provided on the outer circumferential surface of the electrode post, on the side of the annular groove facing the busbar. Epoxy resin sealant is provided on the surface of the outer circumferential surface of the electrode post on the side of the vulcanized rubber sleeve facing the busbar, the surface of the busbar facing the electrode post, and the outer circumferential surface of the busbar.

[0016] The vulcanized rubber sleeve and the epoxy resin sealant are combined to form the anti-corrosion layer.

[0017] Optionally, an epoxy resin sealant is provided in the area where the busbar is located on the side facing the electrode assembly and in contact with the electrode assembly.

[0018] Optionally, the outer circumference of the pole post is provided with epoxy resin sealant, and a plurality of annular protrusions or annular recesses are provided along the axial direction.

[0019] Optionally, the outer circumference of the pole post is provided with epoxy resin sealant and has several annular protrusions along the axial direction.

[0020] Optionally, an electrolyte containing crystalline magnesium sulfate heptahydrate is attached to the electrode assembly.

[0021] Optionally, the colored adhesive is flush with the outer surface of the battery casing.

[0022] Optionally, the negative electrode plate is coated with a graphite-containing coating.

[0023] As can be seen, the battery provided by this utility model includes an electrode assembly, a busbar, terminals, and electrolyte, as well as a battery casing for holding the electrode assembly, busbar, terminals, and electrolyte. One end of the busbar is connected to the electrode assembly, and the other end of the busbar is connected to the terminal. Several annular grooves are axially arranged on the outer circumferential surface of the terminal. Anti-corrosion layers are provided on the surface of the busbar facing the terminal and on the outer circumferential surface of the busbar. The battery casing has terminal holes into which the terminals extend. The portion of the post hole, along the direction pointing outwards from the battery casing, is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive. The electrode assembly includes alternating positive and negative plates, and a separator disposed between the positive and negative plates. The positive plate includes a positive plate grid and positive lead paste cured at the positive plate grid; the negative plate includes a negative plate grid and negative lead paste cured at the negative plate grid. The battery casing is provided with a gas vent valve, and a catalyst is disposed inside the battery casing near the gas vent valve. This invention reduces battery water loss by placing a catalyst inside the battery casing near the gas vent valve. By providing an anti-corrosion layer on the surface of the aforementioned posts and busbars, providing an annular groove on the surface of the posts, and sealing the posts with the battery casing, it reduces electrolyte acid creep and corrosion. Attached Figure Description

[0024] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0025] Figure 1 This is a schematic diagram of the structure of a storage battery provided in an embodiment of the present utility model;

[0026] Figure 2 A schematic diagram of the structure of the electrode group assembly, busbar and terminal post fixing in a storage battery provided by an embodiment of the present utility model;

[0027] Figure 3 A schematic diagram of the front and side views of the combined structure of the positive electrode plate in a storage battery provided in an embodiment of this utility model;

[0028] Figure 4 A schematic diagram of the structure of the positive electrode grid in a storage battery is provided for an embodiment of this utility model;

[0029] Figures 1 to 4 The reference numerals in the attached figures are explained as follows:

[0030] 1-Catalyst placement area, 10-Electrode group assembly, 20-Battery casing, 30-Gas exhaust valve, 40-Electrode post, 41-Anti-corrosion layer, 50-Busbar, 60-Negative electrode plate, 70-Positive electrode plate, 71-Positive electrode lead paste, 72-Positive electrode grid, 80-Separator, 91-Frame, 92-Rib. Detailed Implementation

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0032] Existing lead-acid batteries have the following problems when operating in high-temperature environments:

[0033] (1) Battery water loss. When the temperature rises, it will accelerate the electrochemical reaction rate of the battery, increase oxygen evolution at the positive electrode, and intensify oxygen recombination at the negative electrode. Oxygen recombination generates a lot of heat. As the internal pressure of the battery increases, oxygen, hydrogen and water vapor will escape through the gas vent valve, resulting in increased water loss in the lead-acid battery. The loss of water in the electrolyte reduces the battery capacity.

[0034] (2) Busbar and terminal corrosion. Water loss increases the density of the electrolyte, accelerating the corrosion of the busbar and terminals, which in turn leads to the busbar becoming thinner or breaking, damaging the battery.

[0035] This invention reduces battery water loss by placing a catalyst inside the battery casing near the location where the gas vent valve is located. It also reduces electrolyte acid creep and corrosion by providing an anti-corrosion layer on the surface of the terminals and busbars, providing an annular groove on the surface of the terminals, and sealing the terminals with the battery casing.

[0036] Please refer to Figure 1 , Figure 1 This is a schematic diagram of a storage battery provided in an embodiment of the present invention. The storage battery may include:

[0037] Electrode group 10, busbar 50, terminal post 40 and electrolyte, and battery casing 20 for holding electrode group 10, busbar 50, terminal post 40 and electrolyte;

[0038] One end of the busbar 50 is connected to the electrode group assembly 10, and the other end of the busbar 50 is connected to the electrode post 40. Several annular grooves are provided along the axial direction on the outer circumferential surface of the electrode post 40. On the outer circumferential surface of the electrode post 40, the surface of the busbar 50 that is close to the electrode post 40, and the outer circumferential surface of the busbar 50 are all provided with an anti-corrosion layer 41.

[0039] The battery casing 20 has terminal holes, and the portion of the terminal 40 that extends into the terminal holes is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive in the direction pointing outward from the battery casing 20.

[0040] The electrode assembly 10 includes alternating positive electrode plates 70 and negative electrode plates 60, and a diaphragm 80 disposed between the positive electrode plates 70 and negative electrode plates 60. The positive electrode plate 70 includes a positive electrode grid 72 and a positive electrode lead paste 71 cured on the positive electrode grid 72. The negative electrode plate 60 includes a negative electrode grid and a negative electrode lead paste cured on the negative electrode grid.

[0041] The battery casing 20 is provided with a gas discharge valve 30, and a catalyst is provided inside the battery casing 20 near the gas discharge valve 30.

[0042] It should be noted that this embodiment can be referred to accordingly. Figure 2 , Figure 2This is a schematic diagram of the structure of the electrode group assembly, busbar, and terminal fixing in a storage battery according to an embodiment of the present invention. Specifically, in this embodiment, the positive electrode lead paste, before curing and drying, is prepared by weight of 1000 parts lead powder, 100-106 parts dilute sulfuric acid, 0.6 parts short fiber, 90-120 parts purified water, and 12 parts tetrabasic lead sulfate; the negative electrode lead paste, before curing and drying, is prepared by weight of 1000 parts lead powder, 94-100 parts dilute sulfuric acid, 8.2 parts barium sulfate, 2 parts humic acid, 1.6 parts lignin, 4 parts graphite, and 0... The positive electrode lead paste 71 contains 8 parts short fibers and 90-120 parts purified water. Each component can meet the following conditions: the oxidation degree of lead powder is between 70% and 77%, the density of dilute sulfuric acid is 1.40 g / ml, the short fibers are polyester short fibers or polypropylene short fibers, the conductivity of purified water is less than or equal to 2 μS / cm, the content of tetrabasic lead sulfate is greater than 90%, and the apparent density of the prepared positive electrode lead paste 71 is between 4.1 and 4.3 g / cm³. Accordingly, the components in the negative electrode lead paste can meet the following conditions: the oxidation degree of lead powder is between 70% and 77%, the density of dilute sulfuric acid is 1.40 g / ml, the particle size of barium sulfate is between 0.6 and 0.8 μm, the content of humic acid (on a dry basis) is greater than 85%, the particle size of lignin (passing through a 0.074 μm test sieve) is greater than 99%, the carbon content in graphite is greater than 99.99%, the short fibers are polyester short fibers or polypropylene short fibers, the conductivity of pure water is less than or equal to 2 μS / cm, and the apparent density of the prepared negative electrode lead paste is between 4.2 and 4.4 g / cm³. Barium sulfate and other expanding agents are used to suppress the aggregation and shrinkage of lead sulfate. Furthermore, a graphite-containing coating can be applied to the negative electrode. Graphite has excellent conductivity, which can reduce the interfacial resistance of the negative electrode plate and promote rapid electron transfer, thereby improving the battery's charge and discharge efficiency. The hydrophobicity of graphite can adjust the wettability of the electrolyte on the electrode plate surface, ensuring uniform electrolyte distribution and avoiding localized uneven reaction and shrinkage caused by rapid reaction at high temperatures. The above-mentioned setup can prevent the shrinkage of the negative electrode active material. In this embodiment, the ratio of positive electrode active material to negative electrode active material in the electrode assembly 10 can be further set to between 1.7 and 1.8. This embodiment uses positive electrode lead paste 71 as an example; further reference can be made. Figure 3 , Figure 3 This is a schematic diagram of the front and side views of the combined structure of the positive electrode plate in a storage battery, provided by an embodiment of the present invention. In this embodiment, the catalyst placement area 1 can be as follows: Figure 1 As shown, the catalyst is a catalyst that catalyzes the reaction of hydrogen and oxygen to produce water.

[0043] Preferably, the diaphragm 80 provided in this embodiment may include one or more of organic fibers, basalt mineral fibers, and water-soluble polyvinyl alcohol fibers.

[0044] Preferably, the separator 80 can include both basalt mineral fibers and water-soluble polyvinyl alcohol fibers. The basalt mineral fibers have good thermal stability, maintaining stable performance at high temperatures and preventing performance degradation caused by high temperatures. The polyvinyl alcohol fibers have higher mechanical strength, enhancing the overall strength of the separator and making it less prone to breakage during battery operation. Furthermore, organic fibers can be added to the separator 80 to further improve its mechanical strength and chemical stability, enabling it to better resist physical deformation and chemical corrosion during battery charging and discharging, extending battery life. In addition, organic fibers can improve the electrolyte absorption performance of the separator 80, increasing the electrolyte storage capacity and thus improving the battery's discharge capacity and efficiency. By adding the above-mentioned substances to the separator 80, the separator 80 can have higher quantitative density, air permeability, and puncture resistance, which can ensure that the electrode group assembly 10 is kept in a tight assembly state, reduce the resistance of oxygen to permeate through the separator 80 to the negative electrode plate 60, reduce the float charge current, and more effectively solve the problems of increased float charge current under high temperature conditions, degradation of the separator 80 caused by high temperature leading to a decrease in assembly pressure of the lead-acid battery electrode group assembly 10, and short circuit caused by the growth of branch crystals on the electrode plate puncturing the separator 80 under long-term high temperature.

[0045] In this embodiment, the battery is a lead-acid battery, and the terminal 40 can be configured as a structure in which a copper core is connected to a lead sleeve.

[0046] Preferably, the positive electrode lead paste 71, which is solidified at the positive electrode grid 72, has a tetrabasic lead sulfate content of 0.5%-1% by mass in the positive electrode lead paste 71. In this embodiment, the negative electrode plate 60, separator 80, and positive electrode plate 70 can be fixed by casting and welding. During casting and welding, the electrode assembly 10 can be fixed to the busbar 50, and the busbar 50 can be simultaneously fused to the terminal post 40. This embodiment does not limit the specific structure of the battery casing 20. For ease of installation, the battery casing 20 can include a battery slot and a battery cover, which are fitted together. A gas vent valve 30 can be located in the battery cover. Preferably, the battery casing 20 can be formed by blending acrylonitrile-butadiene-styrene copolymer, liquid crystal polymer, and polyphthalamide. In this embodiment, PC-ABS is a material that combines the advantages of PC (polycarbonate) and ABS (acrylonitrile-butadiene-styrene copolymer), possessing good impact strength, dimensional stability, and processing performance. LCP exhibits excellent flowability. PPA is a high-temperature nylon with heat resistance, chemical resistance, and mechanical strength. For example, adding LCP to PC-ABS can improve the material's flowability and molding performance, while adding PPA can further enhance the composite material's heat resistance and chemical resistance. In one feasible embodiment, the battery casing 20 can be prepared by blending PC-ABS, LCP, and PPA.

[0047] In one feasible embodiment, the battery manufacturing method may include the following steps:

[0048] S101: By weight, 1000 parts lead powder, 0.6 parts short fiber, and 12 parts tetrabasic lead sulfate are mixed. Water is added to the dry-mixed mixture at a ratio of 90-120 parts purified water, and wet mixing is performed. Then, acid is added to the wet-mixed mixture at a ratio of 100-106 parts dilute sulfuric acid. After stirring, a paste is produced to form positive electrode lead paste 71. By weight, 1000 parts lead powder, 8.2 parts barium sulfate, 2 parts humic acid, 1.6 parts lignin, 4 parts graphite, and 0.8 parts short fiber are mixed. Water is added to the dry-mixed mixture at a ratio of 90-120 parts purified water, and wet mixing is performed. Then, acid is added to the wet-mixed mixture at a ratio of 94-100 parts dilute sulfuric acid. After stirring, a paste is produced to form negative electrode lead paste.

[0049] Specifically, in this embodiment, the dry mixing process takes 10 to 15 minutes. During the wet mixing process, water must be added while maintaining a uniform stirring speed, and the stirring rate and the amount of water added should be finely adjusted according to the density of the paste being mixed. The wet mixing process takes 5 minutes, and the water addition during this process must be completed within 1 to 2 minutes. Furthermore, when adding acid during the above-mentioned paste mixing process, the temperature should not exceed 70°C, and the operating temperature during the paste dispensing process after stirring should not exceed 48°C.

[0050] S102: The positive electrode lead paste 71 is uniformly coated on the positive electrode grid 72 to prepare a positive electrode preform, and the negative electrode lead paste is uniformly coated on the negative electrode grid to prepare a negative electrode preform; the positive electrode preform is dried at a temperature of 75-85℃ to obtain a dried positive electrode 70, and the negative electrode preform is dried at a temperature of 65-75℃ to obtain a dried negative electrode 60.

[0051] In this embodiment, preferably, the drying temperature of the positive electrode plate 70 can be set to 85°C and the drying temperature of the negative electrode plate 60 can be set to 75°C.

[0052] S103: The positive electrode plate 70 and the negative electrode plate 60 are arranged alternately, and a separator 80 is set between adjacent positive electrode plates 70 and negative electrode plates 60. The positive electrode plate 70, separator 80 and negative electrode plate 60 are connected and fixed in sequence, and the busbar 50 and the terminal post 40 are connected accordingly. They are installed in the battery casing 20 in conjunction with the electrolyte.

[0053] In another feasible embodiment, the battery manufacturing process may include the following steps:

[0054] Step S11: A vulcanized rubber sleeve is installed on the side of the annular groove on the outer circumferential surface of the pole post 40 that faces the busbar 50.

[0055] Step S12: The processed pole post 40 is fused to the busbar 50 during the casting and welding process of the pole group assembly 10;

[0056] Step S13: Wipe the surfaces of the electrode post 40 and busbar 50, which have been treated in the above steps, clean them with an alcohol swab.

[0057] Step S14: Use a brush to apply the prepared epoxy resin sealant evenly along the outer circumference of the pole post 40, on the side of the vulcanized rubber sleeve facing the busbar 50, the surface of the busbar 50 facing the pole post 40, and the outer circumference of the busbar 50.

[0058] Step S15: The electrode group assembly 10, the busbar 50 connected to the electrode group assembly 10, and the electrode post 40 fused to the busbar 50 processed in the above steps are dried and cured to reduce the fluidity of the epoxy resin sealant.

[0059] Step S16: Seal the battery cover of the electrode assembly 10, busbar 50 and terminal post 40 processed in the above steps. The terminal post extends into the terminal post hole opened in the battery cover. Then, in the space between the terminal post 40 and the inner wall of the terminal post hole, install the sealing ring, sealing ring and pressure nut in sequence in the direction pointing outward of the battery cover. After the sealing thread set at the pressure nut and the inner wall of the terminal post hole is tightly fitted, fill the space of the pressure nut towards the outside with the prepared colored adhesive until the colored adhesive is flush with the outer surface of the battery cover.

[0060] In this embodiment, the aforementioned anti-corrosion terminal post sealing structure is provided, which completely seals the contact interface between the battery cover and the terminal post 40, reducing the possibility of sulfuric acid electrolyte creeping up within the contact interface. At the same time, the colored adhesive filled into the upper space of the pressure nut is a pure colored adhesive, making the process simple and efficient.

[0061] Furthermore, in order to improve the catalytic effect of the catalyst on hydrogen and oxygen, a catalyst placement chamber can be provided inside the battery casing 20, one end of the catalyst placement chamber is connected to the inside of the battery casing 20, and the other end of the catalyst placement chamber is connected to the gas discharge valve 30.

[0062] The catalyst is placed inside the catalyst placement chamber.

[0063] In this embodiment, by connecting one end of the catalyst placement chamber to the inside of the battery casing 20 and the other end of the catalyst placement chamber to the gas discharge valve 30, it is ensured that the gas generated during battery operation first flows through the catalyst placement chamber. The oxygen and hydrogen in the chamber combine under the action of the catalyst to form water, which then flows back into the electrolyte. Any remaining gas can be discharged through the gas discharge valve 30. By placing the catalyst placement chamber in the path of gas overflow from the battery casing 20, the catalytic effect of the catalyst can be fully utilized, thereby reducing water loss from the electrolyte.

[0064] Furthermore, to address the issue of increased corrosion rate of electrode components 10 due to increased electrolyte water loss concentration, reference can be made to... Figure 4 , Figure 4 This is a schematic diagram of the structure of a positive electrode grid in a storage battery according to an embodiment of the present invention. In this embodiment, both the positive electrode grid 72 and the negative electrode grid may include a frame 91 and ribs 92 arranged in a grid pattern within the frame 91;

[0065] Both the frame 91 and the ribs 92 contain crystal nucleating agents.

[0066] It should be noted that, taking the positive electrode grid 72 as an example, in this embodiment, by adding a crystal nucleating agent to the aforementioned frame 91 and rib 92, the corrosion resistance of the frame 91 and rib 92 can be enhanced. In a feasible embodiment, the aforementioned frame 91 and rib 92 can be configured to include at least one material selected from lead, calcium, tin, aluminum, silver, bismuth, antimony, copper, nickel, and magnesium. For example, in a lead-acid battery, both the frame 91 and rib 92 may include tin and calcium. In this case, increasing the tin content and decreasing the calcium content can both enhance the corrosion resistance of the positive electrode grid 72 and the negative electrode grid.

[0067] Furthermore, to avoid the problem of reduced corrosion resistance of the electrode post 40 and busbar 50 due to electrolyte dehydration caused by temperature rise, a vulcanized rubber sleeve can be provided on the outer circumferential surface of the electrode post 40, on the side of the annular groove facing the busbar 50. Epoxy resin sealant is provided on the surface of the outer circumferential surface of the electrode post 40 on the side of the vulcanized rubber sleeve facing the busbar 50, the surface of the busbar 50 facing the electrode post 40, and the outer circumferential surface of the busbar 50.

[0068] The combination of vulcanized rubber sleeve and epoxy resin sealant forms an anti-corrosion layer 41.

[0069] It should be noted that the vulcanized rubber sleeve provided in this embodiment has good mechanical strength and wear resistance. On the outer circumference of the electrode post 40, an epoxy resin sealant is provided on the surface of the vulcanized rubber sleeve facing the busbar 50. This ensures a firm bond with the electrode post 40, preventing loosening or detachment. It also ensures stability under high temperature conditions, prevents electrolyte acid creep, and thus improves the corrosion resistance of the electrode post 40.

[0070] Furthermore, in order to further reduce the impact of high temperature on the battery's performance, the busbar 50 can be positioned on the side facing the electrode assembly 10, and an epoxy resin sealant can be provided in the area where it contacts the electrode assembly 10.

[0071] It should be noted that in this embodiment, the busbar 50 is conductively connected to the positive electrode plate 70 or negative electrode plate 60 of the electrode group assembly 10 on the side facing the electrode group assembly 10. In one embodiment, the busbar 50 has multiple protruding structures with gaps between adjacent protruding structures. To prevent the electrolyte from corroding the surface of the busbar 50 at these gaps, in this embodiment, epoxy resin sealant is provided in the area of ​​the busbar 50 that contacts the electrode group assembly 10 on the side facing the electrode group assembly 10 to further improve the corrosion resistance of the busbar 50.

[0072] Furthermore, in order to prevent the electrolyte from creeping and corroding the terminal post 40 and the battery casing 20, in this embodiment, the outer circumference of the terminal post 40 can be provided with epoxy resin sealant, and a number of annular protrusions or annular recesses can be provided along the axial direction.

[0073] It should be noted that in this embodiment, an annular protrusion or annular depression structure is provided at the epoxy resin sealant location on the outer circumference of the electrode post 40. This can extend the acid creep path of the electrolyte on the surface of the electrode post 40 and further prevent the electrolyte from damaging and corroding the electrode post 40.

[0074] Furthermore, in order to reduce electrolyte acid creep while ensuring structural stability, epoxy resin sealant can be applied to the outer circumference of the electrode post 40, and several annular protrusions can be provided along the axial direction.

[0075] It should be noted that, in order to ensure the mechanical strength of the electrode post 40 and avoid structural damage caused by the etching groove, several annular protrusions along the axial direction can be set on the outer circumferential surface of the electrode post 40 at the epoxy resin sealant location. This reduces electrolyte acid creep while ensuring the structural stability of the electrode post 40.

[0076] Furthermore, in order to improve the charging efficiency of the battery and avoid the problem of heat accumulation during battery operation, an electrolyte containing crystalline magnesium sulfate heptahydrate can be attached to the aforementioned electrode group assembly 10.

[0077] In this embodiment, an attached electrolyte is provided on the electrode assembly 10, which can improve the charging efficiency and conductivity of the battery while meeting the battery capacity requirements, and solve the problems of long charging time and heat accumulation in the battery. Preferably, the electrolyte may include crystalline magnesium sulfate heptahydrate with crystal particles of 0.1 mm to 1 mm in size, accounting for 1%-3% of the electrolyte mass.

[0078] Furthermore, in order to improve the regularity of the battery, the aforementioned colored adhesive can be flush with the outer surface of the battery casing 20.

[0079] In this embodiment, the regularity of the battery is improved by filling the battery with colored adhesive until it is flush with the outer surface of the battery casing 20.

[0080] Furthermore, to avoid the problem of negative electrode sulfation at high temperatures, a graphite-containing coating can be applied to the aforementioned negative electrode plate 60. Graphite has excellent conductivity, which can reduce the interfacial resistance of the negative electrode plate and promote rapid electron transfer, thereby improving the charging and discharging efficiency of the battery. The hydrophobicity of graphite can adjust the wettability of the electrolyte on the electrode plate surface, ensuring uniform electrolyte distribution and avoiding uneven local reactions caused by rapid reactions at high temperatures. As a surface support framework, graphite can reduce the volume expansion / contraction of active materials during charging and discharging, reduce the accumulation of lead sulfate, and delay the phenomenon of negative electrode sulfation. All of the above comprehensively improve the cycle life of the battery.

[0081] The battery provided in this embodiment includes an electrode assembly 10, a busbar 50, terminals 40, and electrolyte, as well as a battery casing 20 for holding the electrode assembly 10, busbar 50, terminals 40, and electrolyte. One end of the busbar 50 is connected to the electrode assembly 10, and the other end of the busbar 50 is connected to the terminals 40. Several annular grooves are axially arranged on the outer circumferential surface of the terminals 40. Anti-corrosion layers 41 are provided on the outer circumferential surface of the terminals 40, the surface of the busbar 50 approaching the terminals 40, and the outer circumferential surface of the busbar 50. The battery casing 20 has terminals 40. The portion extending into the terminal hole, along the direction pointing outwards from the battery casing 20, is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive. The electrode assembly 10 includes alternately arranged positive electrode plates 70 and negative electrode plates 60, and a separator 80 disposed between the positive electrode plates 70 and negative electrode plates 60. The positive electrode plate 70 includes a positive electrode grid 72 and positive electrode paste 71 cured at the positive electrode grid 72. The negative electrode plate 60 includes a negative electrode grid and negative electrode paste cured at the negative electrode grid. The battery casing 20 is provided with a gas vent valve 30, and a catalyst is disposed inside the battery casing 20 near the gas vent valve 30. This invention reduces battery water loss by placing a catalyst inside the battery casing 20 near the gas vent valve 30. By providing an anti-corrosion layer 41 on the surfaces of the terminal 40 and the busbar 50, providing an annular groove on the surface of the terminal 40, and sealing the terminal 40 with the battery casing 20, it reduces electrolyte acid creep and corrosion.

[0082] Furthermore, this embodiment of the invention improves the catalytic effect of the catalyst by connecting one end of the catalyst placement chamber to the inside of the battery casing 20 and the other end of the catalyst placement chamber to the gas exhaust valve 30, thereby reducing water loss in the electrolyte. Adding a crystal nucleating agent to the frame 91 and ribs 92 enhances their corrosion resistance. The combination of a vulcanized rubber sleeve and epoxy resin sealant to form an anti-corrosion layer 41 ensures good mechanical strength and wear resistance on the side in contact with the battery casing 20, while also ensuring… The strong bond between the side of the busbar 50 and the terminal post 40 prevents loosening or detachment, ensuring stability under high-temperature conditions, preventing electrolyte acid creep, and thus improving the corrosion resistance of the terminal post 40. By applying epoxy resin sealant to the area of ​​the busbar 50 in contact with the electrode assembly 10 on the side of the busbar 50, the corrosion resistance of the busbar 50 can be further improved. Furthermore, by providing an annular raised structure or annular recessed structure at the location of the epoxy resin sealant on the outer circumference of the terminal post 40, the acid creep path of the electrolyte on the surface of the terminal post 40 can be extended. To further prevent electrolyte damage and corrosion of the terminal post 40, several annular protrusions are provided along the axial direction at the epoxy resin sealant locations on the outer circumferential surface of the terminal post 40. This reduces electrolyte acid creep while ensuring the structural stability of the terminal post 40. Furthermore, by attaching electrolyte to the electrode assembly 10, and by including crystalline magnesium sulfate heptahydrate, the charging efficiency of the battery can be improved while meeting the battery capacity requirements, conductivity can be enhanced, and the problems of long charging times and heat accumulation in the battery can be solved. Finally, colored adhesive is used to fill the gap until it is flush with the outer surface of the battery casing 20. This improves the regularity of the battery; the negative electrode plate 60 is coated with a graphite-containing coating. Graphite has excellent conductivity, which can reduce the interfacial resistance of the negative electrode plate and promote rapid electron transfer, thereby improving the charging and discharging efficiency of the battery; the hydrophobicity of graphite can adjust the wettability of the electrolyte on the electrode plate surface, ensuring uniform distribution of the electrolyte and avoiding uneven local reactions caused by rapid reactions at high temperatures; as a surface support framework, graphite can reduce the volume expansion / contraction of active materials during charging and discharging, reduce the accumulation of lead sulfate, and delay the sulfation of the negative electrode. All of the above comprehensively improve the cycle life of the battery.

[0083] The various embodiments in this specification are described in a progressive manner. Each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0084] Furthermore, it should be noted that in this document, relationships such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations are intended to cover non-exclusive inclusion.

[0085] The present invention provides a detailed description of a storage battery. Specific examples have been used to illustrate the principle and implementation of the present invention. The description of the above embodiments is only for the purpose of helping to understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, there will be changes in the specific implementation and application scope based on the idea of ​​the present invention. Therefore, the content of this specification should not be construed as a limitation of the present invention.

Claims

1. A storage battery, characterized in that, include: Electrode assembly, busbar, terminal post and electrolyte, and battery casing for holding the electrode assembly, the busbar, the terminal post and the electrolyte; One end of the busbar is connected to the electrode group assembly, and the other end of the busbar is connected to the electrode post. Several annular grooves are provided along the axial direction on the outer circumferential surface of the electrode post. On the outer circumferential surface of the electrode post, the surface of the busbar facing the electrode post and the outer circumferential surface of the busbar are all provided with anti-corrosion layers. The battery casing has a terminal hole, and the portion of the terminal extending into the terminal hole is sequentially filled with a sealing ring, a sealing ring, a pressure nut, and colored adhesive in the direction pointing outward from the battery casing. The electrode assembly includes alternating positive and negative electrode plates, and a diaphragm disposed between the positive and negative electrode plates. The positive electrode plate includes a positive electrode grid and positive lead paste cured on the positive electrode grid. The negative electrode plate includes a negative electrode grid and negative lead paste cured on the negative electrode grid. The battery casing is provided with a gas vent valve, and a catalyst is provided inside the battery casing near the gas vent valve.

2. The storage battery according to claim 1, characterized in that, The battery casing is provided with a catalyst placement chamber. One end of the catalyst placement chamber is connected to the inside of the battery casing, and the other end of the catalyst placement chamber is connected to the gas discharge valve. The catalyst is placed inside the catalyst placement chamber.

3. The storage battery according to claim 1, characterized in that, Both the positive electrode grid and the negative electrode grid include a frame and ribs arranged in a grid pattern within the frame; Both the frame and the ribs contain crystal nucleating agents.

4. The storage battery according to claim 1, characterized in that, On the outer circumferential surface of the electrode post, a vulcanized rubber sleeve is provided on the side of the annular groove facing the busbar. Epoxy resin sealant is provided on the surface of the outer circumferential surface of the electrode post on the side of the vulcanized rubber sleeve facing the busbar, the surface of the busbar facing the electrode post, and the outer circumferential surface of the busbar. The vulcanized rubber sleeve and the epoxy resin sealant are combined to form the anti-corrosion layer.

5. The storage battery according to claim 4, characterized in that, The busbar is located on the side facing the electrode assembly, and an epoxy resin sealant is provided in the area where it contacts the electrode assembly.

6. The storage battery according to claim 4, characterized in that, The outer circumference of the pole post is provided with epoxy resin sealant, and several annular protrusions or annular recesses are provided along the axial direction.

7. The storage battery according to claim 6, characterized in that, The outer circumference of the pole post is provided with epoxy resin sealant, and several annular protrusions are provided along the axial direction.

8. The storage battery according to claim 1, characterized in that, The electrode assembly is coated with an electrolyte containing crystalline magnesium sulfate heptahydrate.

9. The storage battery according to claim 1, characterized in that, The colored adhesive is flush with the outer surface of the battery casing.

10. The storage battery according to claim 1, characterized in that, The negative electrode plate is coated with a graphite-containing coating.

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