A starting lead-acid battery for a generator set

Abstract

The application discloses a starting lead-acid storage battery for a generator set, which comprises a battery shell, the battery shell is equally divided into a plurality of single cells by single cell walls along the length direction, each single cell is provided with a pole group, the pole group comprises a plurality of positive plates, a plurality of negative plates and a plurality of separators, the positive plates and the negative plates are vertically and alternately arranged in parallel, the separators are arranged in parallel between the positive plates and the negative plates, the upper ends of the positive plates and the negative plates are respectively provided with two plate ears, the two plate ears are located on the same side of the middle line of the positive plate or the negative plate, so that one end of the upper part of each pole group is provided with two positive bus bars and the other end is provided with two negative bus bars, the positive bus bars and the negative bus bars between the adjacent two single cells are connected through an intermediate pole, the width of the intermediate pole is 22-25 mm and the height is 15-18 mm, so that the intermediate pole is short and wide. The battery has high starting capacity.

Description

Technical Field

[0001] This invention relates to the field of lead-acid battery technology, and in particular to a starting lead-acid battery for generator sets. Background Technology

[0002] The operating conditions of starting lead-acid batteries for generator sets differ from those of traditional starting lead-acid batteries. Generator set batteries are used in conditions where the batteries are float charged for a long time, the starting frequency is low, and high-power generator sets have more stringent requirements for instantaneous starting current parameters. This requires starting batteries to have high starting capabilities.

[0003] Existing traditional lead-acid starting batteries for generator sets have the following structural defects: First, traditional electrode groups are generally configured with one positive bus and one negative bus, concentrating all the current in a single conductive channel, resulting in insufficient conductive cross-sectional area, high internal resistance, and poor starting performance; Second, traditional intermediate terminals adopt a narrow and tall structure, with a width of 19-22mm and a height of about 23mm. The vertical height occupies a large amount of effective space in the upper part of the battery casing. Due to space constraints, the effective height of traditional electrodes after removing the tabs is only 99-130mm, limiting the reaction area of ​​the electrodes to carry the active material, further compressing the battery capacity and the upper limit of instantaneous starting current, and further reducing starting performance. Summary of the Invention

[0004] The purpose of this invention is to provide a starting lead-acid battery for generator sets that has high starting capability.

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a starting lead-acid battery for generator sets, comprising a battery casing. The battery casing is divided into multiple cells along its length by multiple individual cell walls. Each cell contains an electrode group, which includes multiple positive plates, multiple negative plates, and multiple separators. The positive and negative plates are arranged vertically alternately in parallel. The separators are arranged parallel between the positive and negative plates. Each positive and negative plate has two lugs at its upper end, both located on the same side of the centerline of the positive or negative plate. This results in two positive busbars at one end and two negative busbars at the other end of the upper part of each electrode group. The positive and negative busbars between adjacent cells are connected by an intermediate terminal post. The intermediate terminal post has a width of 22-25 mm and a height of 15-18 mm, making it short and wide.

[0007] Preferably, there are six cells, which are respectively a negative cell, a second cell, a third cell, a fourth cell, a fifth cell, and a positive cell. The two negative buses in the negative cell are connected to form a negative bus, and the upper part of the negative bus is connected to the negative terminal post. The two positive buses in the positive cell are connected to form a positive bus, and the upper part of the positive bus is connected to the positive terminal post.

[0008] Preferably, the negative bus includes a first negative bus and a second negative bus, and the positive bus includes a first positive bus and a second positive bus. The upper end of the positive electrode plate is provided with a first positive lug and a second positive lug, and the upper end of the negative electrode plate is provided with a first negative lug and a second negative lug. Multiple first positive lugs are connected through the first positive bus, multiple second positive lugs are connected through the second positive bus, multiple first negative lugs are connected through the first negative bus, and multiple second negative lugs are connected through the second negative bus.

[0009] Preferably, the upper end of the first positive busbar is connected to a first positive intermediate terminal, the upper end of the second positive busbar is connected to a second positive intermediate terminal, the upper end of the first negative busbar is connected to a first negative intermediate terminal, and the upper end of the second negative busbar is connected to a second negative intermediate terminal.

[0010] Preferably, the first positive intermediate pole and the first negative intermediate pole on the same straight line of adjacent cells, and the second positive intermediate pole and the second negative intermediate pole on the same straight line of adjacent cells are all connected by through-wall welding.

[0011] Preferably, each pair of adjacent cells has two through holes at the top of the cell wall for through-wall welding, and the through holes are transversely elliptical in shape.

[0012] Preferably, both the positive electrode plate and the negative electrode plate are composed of a grid and lead paste. The lead paste components of the negative electrode plate, in 100 parts by weight, are: 120 parts lead powder, 0.08-0.1 parts short fiber, 10-12 parts formulated water, 10-11 parts sulfuric acid at 1.4 g / cm3, 0.8-0.9 parts barium sulfate, 0.5-0.6 parts humic acid, 0.1-0.15 parts acetylene black, 0.35-0.50 parts HT lignin, and an appropriate amount of adjusting water.

[0013] Preferably, the width of the positive electrode plate or the negative electrode plate is 140-150mm and the height excluding the height of the plate lugs is 135-145mm, and the width of the plate lugs is 13-15mm.

[0014] Preferably, the partition is a low-resistance double-sided PE partition.

[0015] The present invention achieves the following beneficial technical effects compared to the prior art:

[0016] 1. The starting lead-acid battery for generator sets provided by this invention differs from traditional batteries where a single plate lug and single busbar form a single conductive path, concentrating all discharge current on a single metal conductor with limited conductive cross-sectional area, resulting in large conductor voltage drop and limited output current under high current. In contrast, the battery of this invention features a first lug and a second lug on each plate. All first lugs converge to a first busbar, and all second lugs converge to a second busbar, forming two parallel conductive channels, thus increasing the total conductive cross-sectional area. During generator set startup, current can be evenly distributed through these two channels, reducing the conductive internal resistance. Since the discharge current is extremely large at startup, lower conductive internal resistance results in a smaller voltage drop at the output terminal, enabling a more continuous and stable output of a large current, thus enhancing starting performance. Furthermore, the double lugs of this invention are welded to two busbars respectively, and the upper two points of the plate are simultaneously fixed, increasing the vibration resistance of the electrode group.

[0017] 2. The starting lead-acid battery for generator sets provided by this invention has a short and wide central terminal column with a height reduced to 15-18mm, and a vertical height reduced by up to 8mm. The freed-up top space can be used to increase the height of the electrode plates, raising the effective height of the plates to 135-145mm. With the increased plate height, the total amount of positive and negative lead paste active material that can be filled into the plates increases for the same casing width. This ensures sufficient material to participate in the electrochemical reaction instantly, expanding the effective area for the electrochemical reaction. Since generator set starting is a condition of instantaneous ultra-high current discharge, the large-area electrode plates can release a huge current instantly, further improving the starting capability of the battery. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the positive end cell in this invention;

[0019] Figure 2 This is a schematic diagram of the structure of any intermediate cell in this invention;

[0020] Figure 3 This is a cross-sectional view of the top surface of the battery in this invention;

[0021] Figure 4 This is a schematic diagram of the negative electrode plate in this invention;

[0022] Figure 5 This is a schematic diagram of the positive electrode plate in this invention;

[0023] In the diagram: 1-Battery casing, 2-Cell wall, 3-Electrode group, 4-Electrolyte, 5-Positive plate, 6-Negative plate, 7-Separator, 8-First positive lug, 9-Second positive lug, 10-First negative lug, 11-Second negative lug, 12-First positive busbar, 13-Second positive busbar, 14-First negative busbar, 15-Second negative busbar, 16-First positive intermediate terminal, 17-Second positive intermediate terminal, 18-First negative intermediate terminal, 19-Second negative intermediate terminal, 20-Negative cell, 21-Second cell, 22-Third cell, 23-Fourth cell, 24-Fifth cell, 25-Positive cell, 26-Negative busbar, 27-Negative terminal, 28-Positive busbar, 29-Positive terminal, 30-Through hole. Detailed Implementation

[0024] This invention provides a starting lead-acid battery for generator sets, such as... Figures 1-5 As shown, the battery includes a battery casing 1, which is divided into six compartments along its length by multiple individual cell walls 2. Each compartment contains an electrode group 3 and an electrolyte 4. The electrode group 3 includes multiple positive electrode plates 5, multiple negative electrode plates 6, and multiple separators 7. The positive electrode plates 5 and negative electrode plates 6 are arranged vertically alternately in parallel. The separators 7 are arranged parallel between the positive electrode plates 5 and the negative electrode plates 6. The upper ends of the positive electrode plates 5 and the negative electrode plates 6 are respectively provided with two lugs. The two lugs are located on the same side of the centerline of the positive electrode plate 5 or the negative electrode plate 6, so that each electrode group 3 has two positive busbars at one end and two negative busbars at the other end. Specifically, the negative bus includes a first negative bus 14 and a second negative bus 15, the positive bus includes a first positive bus 12 and a second positive bus 13, the upper end of the positive plate 5 is provided with a first positive lug 8 and a second positive lug 9, the upper end of the negative plate 6 is provided with a first negative lug 10 and a second negative lug 11, multiple first positive lugs 8 are connected through the first positive bus 12, multiple second positive lugs 9 are connected through the second positive bus 13, multiple first negative lugs 10 are connected through the first negative bus 14, and multiple second negative lugs 11 are connected through the second negative bus 15.

[0025] Traditional batteries use a single lug and busbar, creating a single conductive path. All discharge current is concentrated on a single metal conductor, resulting in a limited conductive cross-sectional area. Under high current, this leads to a large voltage drop and limited output current. In this invention, each plate has a first lug and a second lug. All first lugs converge to a first busbar, and all second lugs converge to a second busbar, forming two parallel conductive channels. This increases the total conductive cross-sectional area. During generator startup, current is evenly distributed through these two channels, reducing the internal resistance. Since the discharge current is extremely high at startup, lower internal resistance results in a smaller voltage drop at the output, allowing for a more stable and continuous high current output, further enhancing starting performance. Furthermore, the double lugs are welded to two buses, and the upper two points of the plate are simultaneously fixed, increasing the vibration resistance of the electrode group 3.

[0026] The positive and negative buses between two adjacent cells are connected by intermediate posts. Each intermediate post is 22-25mm wide and 15-18mm high, making it short and wide. The width of the positive plate 5 or negative plate 6 is 140-150mm, and the height excluding the plate lug height is 135-145mm. The plate lug width is 13-15mm. Specifically, the upper end of the first positive bus 12 is connected to the first positive intermediate post 16, the upper end of the second positive bus 13 is connected to the second positive intermediate post 17, the upper end of the first negative bus 14 is connected to the first negative intermediate post 18, and the upper end of the second negative bus 15 is connected to the second negative intermediate post 19. The first positive intermediate post 16 and the first negative intermediate post 18 on the same straight line in adjacent cells, and the second positive intermediate post 17 and the second negative intermediate post 19 on the same straight line in adjacent cells are all connected by through-wall welding.

[0027] Traditional intermediate terminal posts are approximately 23mm high, occupying a significant amount of internal space below the battery cover in the vertical direction. This limits the upward extension of the electrode plates, with the highest traditional electrode plate reaching only 130mm after removing the lugs. The present invention features a short and wide intermediate terminal post with a height reduced to 15-18mm, reducing the vertical height by up to 8mm. The freed-up top space can be used to increase the height of the electrode plates, raising the effective plate height to 135-145mm. With the increased plate height, the total amount of positive and negative lead paste active material that can be filled into the plates increases within the same casing width. This ensures ample material for instantaneous electrochemical reactions, expanding the effective electrochemical reaction area. Since generator start-up involves instantaneous ultra-high current discharge, the large-area electrode plates can release a massive current instantly, further enhancing the battery's starting capability.

[0028] The six cells are, in order, negative cell 20, second cell 21, third cell 22, fourth cell 23, fifth cell 24, and positive cell 25. Cells 21, 22, 23, and 24 are located in the middle of the battery and are collectively referred to as the middle cells. Negative cell 20 and positive cell 25 are located at opposite ends of the battery. The two negative buses in negative cell 20 are connected to form negative bus 26, and the upper part of negative bus 26 is connected to negative terminal 27. The two positive buses in positive cell 25 are connected to form positive bus 28, and the upper part of positive bus 28 is connected to positive terminal 29. This merging of two buses into a single connection structure increases the upper stiffness of the electrode group 3, further improving its vibration resistance.

[0029] Each pair of adjacent single cells has two through holes 30 at the top of the single cell wall 2 for through-wall welding connection. The through holes 30 are horizontally elliptical in shape to match the shape of each intermediate pole post.

[0030] Both the positive electrode plate 5 and the negative electrode plate 6 are composed of grids and lead paste. The lead paste components of the negative electrode plate 6 are as follows (by weight per 100 parts): 120 parts lead powder, 0.08-0.1 parts short fiber, 10-12 parts formulated water, 10-11 parts sulfuric acid at 1.4 g / cm3, 0.8-0.9 parts barium sulfate, 0.5-0.6 parts humic acid, 0.1-0.15 parts acetylene black, 0.35-0.50 parts HT lignin, and appropriate amount of adjusting water. Traditional batteries contain 0.2-0.25 parts carbon black and 0.25-0.3 parts lignin. In this invention, the lead paste for the positive electrode plate 5 uses ordinary positive lead paste, while the lead paste for the negative electrode plate 6 has an increased content of HT lignin. HT lignin is a high-purity organic expanding agent that can inhibit hydrogen evolution during charging of the negative electrode plate 6, reduce water electrolysis losses, and improve the charging acceptance of the negative electrode. During float charging, it can efficiently absorb charging current, avoid overcharging and generate a large amount of gas, and improve overcharge resistance.

[0031] The separator 7 is a low-resistance double-sided PE separator. Raised ribs on both sides of the PE separator create fine flow channels between the electrode plates and the separator 7, ensuring smooth flow of electrolyte 4, reducing ion migration resistance, further lowering the overall internal resistance of the battery, increasing instantaneous discharge current, and improving starting capability. Furthermore, the PE separator has stable electrolyte retention and acid locking properties, preventing electrolyte 4 from stratifying or evaporating under long-term float charging, thus reducing moisture loss.

[0032] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. A starting lead-acid battery for generator sets, comprising a battery casing, wherein the battery casing is divided into multiple cells along its length by multiple cell walls, each cell containing a group of electrodes, the group of electrodes including multiple positive plates, multiple negative plates, and multiple separators, the positive plates and the negative plates being arranged vertically alternately in parallel, and the separators being arranged parallel between the positive plates and the negative plates, characterized in that: The positive electrode plate and the negative electrode plate are respectively provided with two lugs at their upper ends. Both lugs are located on the same side of the center line of the positive electrode plate or the negative electrode plate, so that each electrode group has two positive busbars at one end and two negative busbars at the other end. The positive busbars and negative busbars between two adjacent cells are connected by an intermediate electrode post. The width of the intermediate electrode post is 22-25mm and the height is 15-18mm, so that the intermediate electrode post is short and wide.

2. The starting lead-acid battery for generator sets according to claim 1, characterized in that: The unit cell has six cells, which are respectively called the negative terminal cell, the second cell, the third cell, the fourth cell, the fifth cell, and the positive terminal cell. The two negative buses in the negative terminal cell are connected to form a negative terminal bus, and the upper part of the negative terminal bus is connected to the negative terminal post. The two positive buses in the positive terminal cell are connected to form a positive terminal bus, and the upper part of the positive terminal bus is connected to the positive terminal post.

3. The starting lead-acid battery for generator sets according to claim 2, characterized in that: The negative bus includes a first negative bus and a second negative bus, and the positive bus includes a first positive bus and a second positive bus. The upper end of the positive electrode plate is provided with a first positive lug and a second positive lug, and the upper end of the negative electrode plate is provided with a first negative lug and a second negative lug. Multiple first positive lugs are connected through the first positive bus, multiple second positive lugs are connected through the second positive bus, multiple first negative lugs are connected through the first negative bus, and multiple second negative lugs are connected through the second negative bus.

4. The starting lead-acid battery for generator sets according to claim 3, characterized in that: The upper end of the first positive bus is connected to the first positive intermediate terminal, the upper end of the second positive bus is connected to the second positive intermediate terminal, the upper end of the first negative bus is connected to the first negative intermediate terminal, and the upper end of the second negative bus is connected to the second negative intermediate terminal.

5. The starting lead-acid battery for generator sets according to claim 4, characterized in that: The first positive intermediate pole and the first negative intermediate pole on the same straight line of adjacent cells, as well as the second positive intermediate pole and the second negative intermediate pole on the same straight line of adjacent cells, are all connected by through-wall welding.

6. The starting lead-acid battery for generator sets according to claim 5, characterized in that: Each pair of adjacent cells has two through holes at the top of the cell wall for through-wall welding connections, and the through holes are shaped as horizontal ellipses.

7. The starting lead-acid battery for generator sets according to claim 1, characterized in that: Both the positive and negative electrode plates are composed of grids and lead paste. The lead paste components of the negative electrode plate, in 100 parts by weight, are: 120 parts lead powder, 0.08-0.1 parts short fiber, 10-12 parts formulated water, 10-11 parts sulfuric acid at 1.4 g / cm3, 0.8-0.9 parts barium sulfate, 0.5-0.6 parts humic acid, 0.1-0.15 parts acetylene black, 0.35-0.50 parts HT lignin, and an appropriate amount of adjusting water.

8. The starting lead-acid battery for generator sets according to claim 1, characterized in that: The width of the positive electrode plate or the negative electrode plate is 140-150mm and the height excluding the height of the plate lugs is 135-145mm, and the width of the plate lugs is 13-15mm.

9. The starting lead-acid battery for generator sets according to claim 1, characterized in that: The partition is a low-resistance double-sided PE partition.

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