Paste type polar plate structure lead-acid storage battery for traction

Abstract

The utility model relates to a paste type pole plate structure lead-acid storage battery for traction, which comprises a battery jar, a battery cover, a jar bottom saddle, a pole plate group, electrolyte and a safety valve, the jar bottom saddle is arranged at the bottom of the battery jar, the pole plate group is assembled on the jar bottom saddle, the electrolyte is injected into the battery jar, the battery cover is packaged at the upper part of the battery jar, and the safety valve is arranged on the battery cover. A safety valve is mounted on the battery cover, the positive plate is a paste type bagged polar plate, the paste type bagged polar plate comprises a positive plate, glass felt cloth and a bag type partition plate, a layer of glass felt cloth is wrapped outside the positive plate, and the positive plate wrapped with the glass felt cloth is sleeved in the bag type partition plate. According to the utility model, the problem that active substances fall off is solved, the assembly pressure of the polar plate group is increased, and the charging acceptance of the battery is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of battery production, and particularly relates to a traction paste-coated plate structure lead-acid battery. BACKGROUND

[0002] With the rapid development of industry, electric locomotives are also used more and more commonly, and the demand for traction lead-acid batteries as power sources of electric locomotives is also increasing. Currently, the lead-acid batteries used in traction electric locomotives are all tubular plate structure lead-acid batteries, and the positive plates are assembled by lead core skeletons, polyester (or other materials) pipe, plastic bottom, and positive active material. The material and production cost of the tubular positive plate are higher than those of the paste-coated plate, and the production process is complicated. Whether it is powder filling or paste extrusion, there is environmental pollution. In addition, the contact area between the active material of the tubular plate and the electrolyte is small, the discharge performance of the battery is poor, the utilization rate of the active material is low, the surface area of the tubular plate is too small, the negative plate does not cooperate well, the internal resistance is large, and other defects exist. If the paste-coated positive plate is directly used in the traction lead-acid battery, the paste-coated positive plate will swell and deform during use, causing the active material to fall off, resulting in capacity loss and reducing the service life of the battery. The active material falling off during the recycling process can easily cause internal short circuit and quality and safety hazards. At present, the material cost and labor cost are always high, and the market competition is fierce, and the sales price is getting lower and lower, so it is necessary to develop a battery with low cost, simple manufacturing, and superior performance. CONTENT OF THE UTILITY MODEL

[0003] The utility model solves the problem of the prior art and provides a traction paste-coated plate structure lead-acid battery.

[0004] The utility model is implemented by the following technical solutions:

[0005] A traction paste-coated plate structure lead-acid battery, comprising a battery tank, a battery cover, a tank bottom saddle, a plate group, an electrolyte, and a safety valve, wherein the tank bottom saddle is placed at the bottom of the battery tank, the plate group is assembled on the tank bottom saddle, the electrolyte is injected into the battery tank, the battery cover is packaged on the upper part of the battery tank, and the safety valve is installed on the battery cover.

[0006] The pole group comprises a positive pole, a negative pole, a positive busbar, a negative busbar, a positive plate and a negative plate, the bottom of the positive pole and the negative pole is connected with the positive busbar and the negative busbar respectively, the positive busbar and the negative busbar are connected with the positive plate and the negative plate respectively, and the positive plate is a gelled positive plate.

[0007] Further, the gelled positive plate comprises a positive sheet, a glass felt cloth and a bag type separator, the positive sheet is wrapped with a layer of glass felt cloth, and the positive sheet wrapped with the glass felt cloth is sleeved in the bag type separator.

[0008] Further, the positive sheet is composed of a tab, a positive grid and a positive active material, the tab is installed on the top of the positive grid, and the positive grid is coated with the positive active material on both sides.

[0009] Further, the positive grid is a square grid, which is vertically casted by horizontal ribs and vertical ribs.

[0010] Further, the bag type separator is a hollow bag structure with an open upper end and closed lower end and two sides.

[0011] Further, the bag type separator is a rectangular hollow bag with an open upper end, and is made of PE separator material.

[0012] Further, the width and height of the bag type separator are equal to the width and height of the negative plate.

[0013] Further, the thickness of the bag type separator is 3-15 mm.

[0014] Further, the glass felt cloth is interwoven by glass fiber filaments.

[0015] Further, the groove bottom saddle is made of plastic and is a plastic strip or a plastic block in the shape of a saddle.

[0016] The utility model has the advantages of the following:

[0017] (1) in order to solve the paste type positive plate in the use process occurs swelling deformation phenomenon and active material shedding problem, the utility model discloses a positive plate adopts paste type bagged pole. The paste type bagged pole includes positive sheet, glass felt, bag type baffle, the outside of the positive sheet is wrapped with a layer of glass felt, and the positive sheet with glass felt is sleeved in the bag type baffle. When the battery adds electrolyte and carries out charge and discharge, the positive sheet and glass felt will produce swelling, and the bag type baffle is tightly sleeved on the outside of the positive sheet with glass felt from bottom to top, so that the assembly of the paste type bagged pole is more compact, in the continuous charge and discharge process, the positive plate grid and the positive active material are completely wrapped by the double layers of glass felt and bag type baffle, the problem of active material shedding is solved, the assembly pressure of the pole group is increased, the charge acceptance of the battery is improved, and the cycle service life of the battery is prolonged.

[0018] (2) the bag type baffle of the utility model is a hollow bag with an open upper end and closed lower end and two sides. The bag type baffle is made of PE baffle material by compression bonding and welding into a bag type structure, which can meet the use of gel electrolyte battery and the use of dilute sulfuric acid solution electrolyte. The PE baffle material has small internal resistance, high porosity and good cycle performance.

[0019] (3) the positive and negative lead-out pole hole of the battery cover and the positive and negative pole are sealed by double sealing, and the first sealing is realized by lead welding between the lead sleeve and the pole after the pole passes through the lead-out pole hole, and the second sealing is realized by epoxy resin glue on the upper part of the lead sleeve. The double sealing makes the sealing performance of the battery better, and further prevents the battery from climbing acid. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the overall assembly schematic diagram of the storage battery provided by the utility model;

[0021] Figure 2 is the connection structure schematic diagram of the pole, lead sleeve and battery cover of the utility model;

[0022] Figure 3 is the pole group assembly schematic diagram of the utility model;

[0023] Figure 4 is the structure schematic diagram of the positive plate of the utility model;

[0024] Figure 5 is the structure schematic diagram of the first lead sleeve of the utility model.

[0025] In the attached diagram, 1—battery case, 2—battery cover, 3—plate group, 4—bottom saddle of the case, 5—electrolyte, 6—safety valve, 7—positive terminal post, 8—negative terminal post, 9—positive busbar, 10—negative busbar, 11—positive plate, 12—negative plate, 13—positive electrode sheet, 14—tab, 15—positive plate grid, 16—positive active material, 17—glass felt, 18—bag-type separator, 19—positive lead-out terminal hole, 20—negative lead-out terminal hole, 21—first lead sleeve, 22—second lead sleeve, 23—groove, 24—positive sealant, 25—negative sealant. Detailed Implementation

[0026] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0027] like Figure 1 , Figure 3 As shown, a traction lead-acid battery with a paste-coated plate structure includes a battery case 1, a battery cover 2, a group of plates 3, a bottom saddle 4, electrolyte 5, and a safety valve 6. The bottom saddle 4 is placed at the bottom of the battery case 1. The bottom saddle 4 is made of plastic and is a saddle-shaped plastic strip or block. The plate group 3 is mounted on the bottom saddle 4. The battery case 1 is filled with electrolyte 5. The battery case 1 is sealed with the battery cover 2, and the safety valve 6 is installed on the battery cover 2.

[0028] The electrode group 3 includes a positive electrode post 7, a negative electrode post 8, a positive electrode bus 9, a negative electrode bus 10, a positive electrode plate 11, and a negative electrode plate 12. The bottoms of the positive electrode post 7 and the negative electrode post 8 are welded to the positive electrode bus 9 and the negative electrode bus 10, respectively. The positive electrode bus 9 and the negative electrode bus 10 are welded to the tabs 14 of the positive electrode plate 11 and the negative electrode plate 12, respectively. The negative electrode plate 12 adopts an existing plate structure, while the positive electrode plate 11 adopts a novel paste-coated bagged electrode plate.

[0029] like Figure 4As shown, the paste-coated bagged electrode plate comprises a positive plate 13, a glass felt cloth 17, and a bag-type separator 18. The positive plate 13 is wrapped with a layer of glass felt cloth 17, and the positive plate 13 wrapped with the glass felt cloth 17 is sleeved in the bag-type separator 18. The glass felt cloth 17 is a non-woven fabric formed by interweaving glass fiber filaments into a net shape and then solidifying with a resin binder. The size of the glass felt cloth 17 is cut according to actual requirements. The positive plate 13 is composed of a tab 14, a positive grid 15, and a positive active material 16. The tab 14 is cast on the top of the positive grid 15, and the positive grid 15 is coated with the positive active material 16 on both sides by a coating machine. Preferably, the positive grid 15 is a square grid formed by vertically casting horizontal and vertical ribs. The positive grid 15 is made of high-tin lead-calcium alloy by high-pressure casting, which has small heat generation, high corrosion resistance, low internal resistance, and small self-discharge.

[0030] The bag-type separator 18 is a hollow bag structure with an open upper end and closed lower end and two sides. As a preferred embodiment, the bag-type separator 18 is a rectangular hollow bag with an open upper end. The width and height of the bag-type separator 18 are equal to those of the negative plate 12, and the thickness of the bag-type separator 18 is 3-15 mm. The bag-type separator 18 is made of PE separator material by compression bonding. It can meet the use of gel electrolyte 5 battery and dilute sulfuric acid solution electrolyte 5. The PE separator material has small internal resistance, high porosity, and good cycle performance.

[0031] When the battery is charged and discharged after adding electrolyte 5, the positive plate 13 and the glass felt cloth 17 will expand, and the bag-type separator 18 will tightly fit outside the positive plate 13 wrapped with the glass felt cloth 17 from bottom to top, so that the assembly of the paste-coated bagged electrode plate is more compact. During continuous charging and discharging, the positive grid 15 and the positive active material 16 are completely wrapped by the double layers of the glass felt cloth 17 and the bag-type separator 18, which solves the problem of active material falling off, increases the assembly pressure of the electrode plate group 3, improves the charging acceptance ability of the battery, and prolongs the cycle life of the battery.

[0032] As shown in Figure 1 , Figure 2 , the battery cover 2 is provided with a positive lead post hole 19 and a negative lead post hole 20. First and second lead sleeves 21 and 22 are respectively arranged in the positive and negative lead post holes 19 and 20. Figure 2 , Figure 5As shown in the drawings, the first lead sleeve 21 and the second lead sleeve 22 are hollow sleeves with the same size and shape, the height of the first lead sleeve 21 is less than the depth of the positive lead-out pole hole 19 of the battery cover 2, the height of the second lead sleeve 22 is less than the depth of the negative lead-out pole hole 20 of the battery cover 2, and the inner diameters of the first lead sleeve 21 and the second lead sleeve 22 are matched with the outer diameters of the positive pole 7 and the negative pole 8 respectively. The first lead sleeve 21 and the second lead sleeve 22 are both made of lead alloy casting, and a plurality of groove 23 structures are added at the contact position of the lead sleeve and the battery cover 2 during design, so as to increase the contact area, and the contact surface and the groove 23 are uniformly coated with high polymer sealing silicon grease material, which is embedded in the pole hole of the battery cover 2 during injection molding of the battery cover 2, so as to ensure the sealing performance between the lead sleeve and the battery cover 2.

[0033] As shown in the drawings, Figure 2 The first lead sleeve 21 is embedded in the positive lead-out pole hole 19 of the battery cover 2, the positive pole 7 extends to the outside of the battery cover 2 through the first lead sleeve 21 and the positive lead-out pole hole 19, and the positive pole 7 is filled with the positive sealing glue 24 between the first lead sleeve 21 and the positive lead-out pole hole 19; the second lead sleeve 22 is embedded in the negative lead-out pole hole 20 of the battery cover 2, the negative pole 8 extends to the outside of the battery cover 2 through the second lead sleeve 22 and the negative lead-out pole hole 20, and the negative pole 8 is filled with the negative sealing glue 25 between the second lead sleeve 22 and the negative lead-out pole hole 20.

[0034] The positive lead-out pole hole 20 and the negative lead-out pole hole 20 of the battery cover 2 and the positive pole 7 and the negative pole 8 are both sealed by the double sealing mode of lead sleeve welding and sealing glue. After the positive pole 7 passes through the positive lead-out pole hole 19, the first lead sleeve 21 and the positive pole 7 are fused by lead welding to form the first sealing, and the upper part of the first lead sleeve 21 is welded to form the second sealing by epoxy resin glue, and the sealing structure of the negative pole 8 is similar. The double sealing mode makes the sealing performance of the battery better, and further prevents the occurrence of battery acid climbing phenomenon.

[0035] The above is only the preferred embodiment of the utility model, and the protection scope of the utility model is not limited to the above-mentioned embodiments. It should be pointed out that, for ordinary skilled persons in the technical field, some improvements and decorations without departing from the principle of the utility model can be regarded as the protection scope of the utility model. The unmentioned components in the embodiment can be realized by the existing technology.

Claims

1. A traction lead-acid battery with a paste-coated plate structure, comprising a battery case, a battery cover, a bottom saddle, a group of plates, an electrolyte, and a safety valve, wherein a bottom saddle is placed at the bottom of the battery case, a group of plates is assembled on the bottom saddle, the battery case is filled with electrolyte, a battery cover is sealed on the top of the battery case, and a safety valve is installed on the battery cover, characterized in that: The electrode assembly includes a positive terminal post, a negative terminal post, a positive busbar, a negative busbar, a positive electrode plate, and a negative electrode plate. The bottoms of the positive and negative terminal posts are connected to the positive and negative busbars, respectively. The positive and negative busbars are connected to the positive and negative electrode plates, respectively. The positive electrode plate is a paste-coated bagged electrode plate. The battery cover has a positive lead-out terminal hole and a negative lead-out terminal hole. A first lead sleeve and a second lead sleeve are respectively installed in the positive and negative lead-out terminal holes. The first lead sleeve is embedded in the positive lead hole of the battery cover. The positive lead extends through the first lead sleeve and the positive lead hole to the outside of the battery cover. Positive sealant is injected between the positive lead and the first lead sleeve and the positive lead hole. The second lead sleeve is embedded in the negative lead hole of the battery cover. The negative lead extends through the second lead sleeve and the negative lead hole to the outside of the battery cover. Negative sealant is injected between the negative lead and the second lead sleeve and the negative lead hole.

2. A lead-acid battery with a greased plate structure for traction as described in claim 1, characterized in that: The coated bagged electrode plate includes a positive electrode sheet, a glass felt cloth, and a bag-type separator. The positive electrode sheet is wrapped with a layer of glass felt cloth, and the positive electrode sheet wrapped with glass felt cloth is fitted into the bag-type separator.

3. A traction lead-acid battery with a paste-coated plate structure according to claim 2, characterized in that: The positive electrode plate is composed of a tab, a positive electrode grid, and a positive electrode active material. The tab is installed on the top of the positive electrode grid, and both sides of the positive electrode grid are coated with the positive electrode active material.

4. A lead-acid battery with a greased plate structure for traction as described in claim 3, characterized in that: The positive electrode grid is a square grid, which is formed by vertically casting transverse and longitudinal ribs.

5. A lead-acid battery with a greased plate structure for traction as described in claim 2, characterized in that: The bag-type partition is a hollow bag structure with an open top and closed bottom and sides.

6. A lead-acid battery with a greased plate structure for traction as described in claim 5, characterized in that: The bag-type divider is a rectangular hollow bag with an opening at the top, and the bag-type divider is made of PE divider material.

7. A traction lead-acid battery with a paste-coated plate structure according to claim 6, characterized in that: The width and height of the bag-type separator are equal to the width and height of the negative electrode plate.

8. A traction lead-acid battery with a paste-coated plate structure according to claim 6, characterized in that: The thickness of the bag-type partition is 3-15mm.

9. A traction lead-acid battery with a paste-coated plate structure according to claim 2, characterized in that: The glass felt is made of interwoven glass fiber filaments.

10. A traction lead-acid battery with a paste-coated plate structure according to claim 1, characterized in that: The saddle at the bottom of the groove is made of plastic and is a saddle-shaped plastic strip or block.

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