CN107026287B - A kind of manufacturing method of lead-acid horizontal battery - Google Patents

Abstract

The invention provides a manufacturing method of a lead-acid horizontal battery, and belongs to the technical field of storage batteries. The horizontal battery solves the problems of high self-discharge and difficult popularization of the existing horizontal battery. The manufacturing method of the lead-acid horizontal battery comprises the following steps: firstly, producing and purchasing accessories; manufacturing a grid; uniformly coating the prepared positive and negative lead pastes on a grid to prepare a positive plate and a negative plate; welding the lugs of one part of the positive plate and the negative plate together to form a continuous horizontal polar plate, and using the other part of the positive plate and the negative plate as a unipolar plate; fifthly, stacking the horizontal polar plate and the unipolar plate in a staggered manner; filling filler in the gaps among the sealing element, the partition wall, the positive electrode lugs and the negative electrode lugs; seventhly, welding a terminal; and eighthly, finishing assembly after covering the battery cover. The present invention uses the present grid structure to replace the light composite material (i.e. lead cloth) in the traditional horizontal battery to manufacture the bipolar plate, and the bipolar plate is in butt joint with the present production process, equipment, etc., so that the resistance of popularization is reduced.

Description

A kind of manufacturing method of lead-acid horizontal battery

technical field

The invention belongs to the technical field of storage batteries, and relates to a manufacturing method of a lead-acid horizontal battery.

Background technique

At present, the chemical power sources used as power batteries for electric vehicles are: nickel-metal hydride batteries, zinc-air batteries, lithium-ion/lithium-polymer batteries, fuel cells and lead-acid batteries, but so far no power battery technology is mature enough to ignore other presence of batteries. Lead-acid batteries have the advantages of low price, mature technology, safety and reliability, abundant resources, and recyclability. However, traditional lead-acid batteries, as power batteries, are compared with other types of batteries in the key indicator of specific energy. Large gap, therefore, lead-acid batteries must be technologically innovative in order to meet the requirements of electric vehicles, while horizontal lead-cloth batteries have greatly improved the battery ratio due to the revolutionary changes in structure and the application of new composite materials. energy, specific power and cycle life, thereby greatly improving the competitiveness of lead-acid batteries as electric vehicle batteries.

1. Four technical characteristics of horizontal battery:

1.1 Lightweight composite material technology: Lead mesh grid is a lead mesh woven from lead wire formed by solid-state extrusion of pure lead (or lead alloy) on high-strength glass fiber. This structure reduces the weight of the battery and improves the weight-to-energy ratio.

1.2 Horizontal bipolar structure; positive and negative plates and separators are stacked horizontally and alternately. Except for unipolar plates at both ends, the rest are bipolar plates. The structure also determines the busbars that must be used in conventional batteries, reduces the amount of lead, and improves the weight specific energy of the battery on the other hand.

1.3 Unique battery box design and pressure frame structure; when the battery is assembled, each cell has an independent pressure frame, the inside of the battery box is a whole body, and there are positioning grooves on all sides of the battery box. When assembling, the ribs of the pressure frame are inserted The positioning groove of the battery box prevents the battery from moving in the shock and vibration environment, improves the impact resistance of the battery, and prolongs the service life of the battery.

1.4 Full automation of production process: automatic coating line, automatic assembly line of manipulator, automatic welding and inspection line, temperature compensation battery testing equipment, etc. These equipments are all unique.

2. Current situation: So far, there are no reliable battery products in batches at home and abroad. The reasons are as follows:

2.1 Paste coating: Due to the thin lead cloth, it is easy to stretch and deform compared with ordinary grid coating, and coating is difficult. In addition, the positive and negative lead pastes are applied on the bipolar grid at the same time, as shown in Figure 1, it is to fill the positive and negative lead pastes on both ends of a piece of lead cloth respectively, and reserve about 10mm isolation belt in the middle Do not apply lead paste. Since lead-acid batteries are very sensitive to the mixing of positive and negative lead pastes, only a 10mm isolation belt makes it insufficient to ensure that the positive and negative lead pastes are completely separated during the plate coating, curing, drying, cleaning and other processes.

2.2 Terminal welding: The lead wire wall is too thin, and the lead and glass fiber themselves do not infiltrate. If the welding is improper, it will easily melt the inner core and cause virtual welding, resulting in a low battery qualification rate.

2.3 Self-discharge: Since there is no partition between the single cells, the self-discharge is large, reaching 10%/month. Another part of the reason may be that although the lean liquid design is adopted, self-discharge occurs between part of the liquid film and the grid.

2.4 Cycle life: The American power company claims that the horizontal battery cycle life is 800-900 weeks, but the actual test life in the same period is only 200-300 weeks.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the above problems existing in the existing horizontal battery, and propose a method for making a lead-acid horizontal battery that can reduce self-discharge and can be connected with the current production process and equipment of common storage batteries.

The object of the present invention can be realized through the following technical solutions:

A preparation method of a lead-acid horizontal battery, characterized in that it comprises the following steps:

①, production and procurement of accessories;

②, the production of grid;

③. The prepared positive and negative lead pastes are evenly filled on the grid, and cured respectively to make positive and negative plates;

④. Weld a part of the tabs of the positive plate and the negative plate together to form a contiguous horizontal plate, and the other part is used as a unipolar plate;

5. The above-mentioned horizontal pole plate and unipolar plate of the positive and negative poles are interlaced, and a separator is inserted between the upper and lower pole plates to separate, and the tab welding place in the horizontal pole plate is stuck in the gap of the above-mentioned partition wall, Each time a horizontal pole plate is stacked, a seal is pressed at the welding place of the notched tab until the stacking is completed;

⑥, fill the filler in the gap between the seal, the partition and the positive and negative electrodes;

⑦, terminal welding;

⑧. Complete the assembly after closing the battery cover.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the grid structure is the same as the conventional structure.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the lead-acid horizontal battery includes a battery casing, a separator, an electrolyte, and positive and negative plates, and the interior of the battery casing is divided into a plurality of cells by partition walls. , and a corresponding pole group is set in each cell. It is characterized in that each pole group is formed by alternately stacking multiple positive and negative plates placed horizontally, and the adjacent positive and negative plates in the same pole group are up and down. A partition is arranged between the partitions, and a gap is formed on the partition along the stacking direction of the positive and negative plates to connect the monomers on both sides. The positive plate and the negative plate which are opposite to each other between the tabs are formed by connecting their tabs together to form a horizontal pole plate, the tab connection is stuck at the above-mentioned gap, and the gap is also provided with a sealing mechanism Seal.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the sealing mechanism includes a plurality of sealing members and a filler filled between the sealing members, the partition walls and the positive and negative electrodes, and the sealing members correspond to the It is located between two horizontal plates that are adjacent to each other up and down.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the sealing member is arranged at the above-mentioned gap, and a filling hole is formed along the stacking direction of the horizontal electrode plates, and the filling holes of the plurality of sealing members are up and down. The filling channels are connected in sequence to form a filling channel, and a positioning mechanism for defining the position of the sealing element is arranged between the sealing element and the partition wall.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positioning mechanism includes two limit chutes arranged at both ends of the seal, and the partition walls on both sides of the gap correspond to the limit slides at opposite ends of the seal. In the groove, when the partition wall is stuck in the limit chute, the seal can move up and down along the gap.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, a bayonet for connecting the corresponding positive and negative electrodes on both sides is formed between the upper and lower stacked seals into the filling hole.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the width of the bayonet is matched with the width of the corresponding side tab.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the filler is epoxy resin or paraffin.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positive and negative plates are formed by applying positive and negative lead pastes on their corresponding grids respectively.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the grid is made of lead-based alloy.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the grid is made of lead-calcium or lead-antimony alloy.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the grid is a foam grid or a composite grid made by an electrodeposition method. Since the grid structure is the same as the normal grid, the terminal welding is consistent with the current process, and there is no problem.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the cells and the corresponding pole groups are both U-shaped, S-shaped or in-line. The series connection lines of the pole groups are respectively U-shaped, S-shaped or in-line, wherein the U-shaped and S-shaped arrangement can greatly shorten the length of the battery and enhance the practicability of this type of battery.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positive electrode plate and the negative electrode plate in the horizontal electrode plate are arranged at horizontal intervals, and the positive electrode lug of the positive electrode plate and the negative electrode lug of the negative electrode plate are located at the above-mentioned intervals and correspond one-to-one connect.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positive electrode plate and the negative electrode plate in the horizontal electrode plate are on the same plane.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positive electrode ear and the negative electrode ear in the horizontal electrode plate are stacked and welded together.

In the above-mentioned manufacturing method of a lead-acid horizontal battery, the positive electrode tab and the negative electrode tab in the horizontal electrode plate are butt-jointed and welded together.

The positive and negative plates are conventional plates after coating, curing and drying. The plates are arranged at horizontal intervals, the tabs are opposite to each other, and the tabs are stacked or butted together, and then the corresponding positive electrodes are welded by heat or cold welding. The lug and negative lug are connected together.

The horizontal polar plate produced by the present invention avoids the problem of "the positive and negative lead pastes are applied on the bipolar grid at the same time, so that the positive and negative lead pastes are mixed". The method, that is, the positive and negative grids, coating, curing and drying processes are carried out according to the current normal battery production process, which can ensure the utilization of existing equipment, ensure product quality, and mass production. After the curing is completed, a process is added, that is, the tabs of the positive and negative plates are fused together by cold welding or heat welding.

Compared with the prior art, the present invention uses the grid structure currently in use to replace the lightweight composite material (ie lead cloth) in the traditional horizontal battery to make the bipolar plate, and appropriately changes the structure of the battery casing to facilitate the production of bipolar plates. It is sealed, which inherits all the electrical properties of the horizontal battery, improves the stability of the product, forms a connection with the current production process and equipment, reduces the resistance of promotion, and has broad development prospects.

Description of drawings

FIG. 1 is a schematic diagram of a quasi-bipolar plate structure of a horizontal battery in the prior art.

Figure 2 is a schematic diagram of the structure of the lead-acid horizontal battery.

FIG. 3 is a schematic structural diagram of FIG. 2 after removing the battery cover.

Figure 4 is a schematic anatomy of the present lead-acid horizontal battery.

FIG. 5 is a partial enlarged view at A of FIG. 4 .

FIG. 6 is a schematic view of the structure of the seal.

Figure 7 is a schematic view of the installation of the seal.

FIG. 8 is a schematic diagram of a U-shaped arrangement of pole groups.

FIG. 9 is a schematic structural diagram of a horizontal polar plate.

In the figure, 1, battery case; 2, separator; 3, between monomers; 4, pole group; 5, terminal; 6, positive plate; 7, negative plate; 8, partition; 9, positive ear; 10, Negative tab; 11. Positive tab; 12. Negative tab; 13. Seal; 14. Filling hole; 15. Limit chute; 16. Bayonet; 17. Notch; 18. Bus bar; 19. Filler ; 20, unipolar plate.

Detailed ways

The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

As shown in Figure 2 and Figure 3, the lead-acid horizontal battery includes a battery casing, a separator, an electrolyte, and positive and negative plates. The interior of the battery casing is divided into a plurality of cells by partition walls, and each cell is divided into a plurality of cells. Correspondingly, a pole group is arranged, and the pole groups are connected in series and the two ends are connected to the two terminals on the battery case one by one. In this embodiment, the monomers and the corresponding pole groups are arranged in a line.

As shown in Figures 4 and 5, each pole group is formed by alternately stacking multiple positive and negative plates placed horizontally. A separator is arranged between the upper and lower adjacent positive and negative plates in the same pole group. The positive plates A positive tab and a negative tab are respectively provided on the side of the negative plate and the positive tab, the positive tabs corresponding to each positive plate in the same pole group are located on the same side to form a positive tab group, and the negative tabs corresponding to each negative plate are on the other side to form a negative tab group, The two adjacent pole groups are connected in series by the opposite positive pole group and negative pole, and the positive pole in the positive pole set and the negative pole in the corresponding negative pole set are connected in one-to-one correspondence at the gap to form a horizontal type. The pole plate connects the two corresponding pole groups in series, and the gap is also provided with a sealing mechanism for sealing. The sealing mechanism includes a plurality of sealing members and a filler filled between the sealing members, the partition wall and the positive and negative electrodes.

As shown in Fig. 6 and Fig. 7 , the sealing member is sandwiched between two adjacent horizontal pole plates in a one-to-one correspondence, and the sealing member is provided with a through filling hole along the stacking direction of the horizontal plates. The filling holes of the sealing element are connected up and down in sequence to form a filling channel, and a positioning mechanism for defining the position of the sealing element is arranged between the sealing element and the partition wall. The positioning mechanism includes two limit chutes arranged at both ends of the seal, and the partition walls on both sides of the gap are stuck in the limit chutes at the opposite ends of the seal in one-to-one correspondence. When the partition is stuck in the limit chutes, the seal Can move up and down along the gap. A bayonet for connecting the corresponding positive and negative tabs on both sides is formed between the upper and lower stacked seals, and the width of the bayonet matches the width of the corresponding side tabs.

The series connection line of the pole group can also be U-shaped as shown in FIG. 8 .

The preparation method of the present invention comprises the following steps:

①, production and procurement of accessories;

②, the grid is made of lead-calcium or lead-antimony alloy material;

③. The prepared positive and negative lead pastes are evenly filled on the grid, and cured respectively to make positive and negative plates;

④. Weld a part of the tabs of the positive plate and the negative plate together to form a contiguous horizontal plate, and the other part is used as a unipolar plate;

⑤. The positive and negative poles of the horizontal pole plate are interlaced and stacked, and the adjacent horizontal pole plates are separated by a partition, and the welding place of the pole lug in the horizontal pole plate is stuck in the gap of the above-mentioned partition wall. A horizontal pole plate is covered with a seal at the welding point of the notched tab. After the cluster is connected in series, the unipolar plates at both ends are interleaved with the corresponding horizontal pole plates, and their positive and negative tabs pass through the confluence respectively. Row connection; after stacking, apply force to the stacked pole group, and then use the pre-pressing plate to fix the pole group and keep the partition at a certain compression ratio;

⑥. Fill the gap between the seal, the partition wall and the positive and negative electrodes. The filler can be epoxy resin or paraffin;

⑦. The bus bars at both ends are respectively welded with the terminals of the battery case;

⑧. Complete the assembly after closing the battery cover.

The finished horizontal battery can achieve good results in terms of deep cycle life, fast charge and discharge, stability and batch size, as shown in the following table:

project conventional battery horizontal battery This patented horizontal battery specific energy Low high middle specific power Low high middle deep cycle life Low high high Fast charge and discharge Difference it is good it is good stability it is good Difference it is good Degree of batching easy Disaster easy

It should be understood that in the claims and description of the present invention, all "including..." should be understood as open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as closed-ended Meaning, i.e. its meaning should not be read as "contains only...".

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention pertains can make various modifications or additions to the described specific embodiments or substitute in similar manners, but will not deviate from the spirit of the present invention or go beyond the definitions of the appended claims range.

Claims (9)

1. a preparation method of a lead-acid horizontal battery, is characterized in that, it comprises the steps: ①. Production and procurement of accessories; production of battery casings, the interior of which is divided into multiple cells by partition walls; ②, the production of grid; ③. The prepared positive and negative lead pastes are evenly filled on the grid, and cured respectively to make positive and negative plates; ④. Weld a part of the tabs of the positive plate and the negative plate together to form a contiguous horizontal plate, and the other part is used as a unipolar plate; 5. The above-mentioned horizontal pole plate and unipolar plate of the positive and negative poles are interlaced, and a separator is inserted between the upper and lower pole plates to separate, and the tab welding place in the horizontal pole plate is stuck in the gap of the above-mentioned partition wall, Each time a horizontal pole plate is stacked, a seal is pressed at the welding place of the notched tab until the stacking is completed; ⑥, fill the filler in the gap between the seal, the partition and the positive and negative electrodes; ⑦, terminal welding; ⑧. Complete the assembly after closing the battery cover. 2. the manufacture method of a kind of lead-acid horizontal battery according to claim 1, is characterized in that, described lead-acid horizontal battery comprises battery casing, separator, electrolyte and positive and negative plates, the interior of battery casing It is divided into a plurality of monomer rooms by the partition wall, and a pole group is correspondingly arranged in each monomer room. A separator is arranged between the upper and lower adjacent positive and negative plates, and a gap is formed on the partition along the stacking direction of the positive and negative plates to connect the monomers on both sides, and the sides of the positive plate and the negative plate are respectively provided with positive lugs and Negative tabs, the positive plates and negative plates that are opposite to each other between the two adjacent pole groups are formed by connecting their tabs together to form a horizontal pole plate. The gap is also provided with a sealing mechanism for sealing. 3. The manufacturing method of a kind of lead-acid horizontal battery according to claim 2, it is characterized in that, described sealing mechanism comprises a plurality of seals and the filler that is filled between seals, partition walls and positive and negative electrodes, The sealing members are sandwiched between two adjacent horizontal pole plates one by one in a one-to-one correspondence. 4 . The method for manufacturing a lead-acid horizontal battery according to claim 3 , wherein the sealing member is provided at the above-mentioned gap, and a filling hole is formed along the stacking direction of the horizontal electrode plates. 5 . The filling holes of the plurality of seals are connected up and down in sequence to form a filling channel, and a positioning mechanism for defining the position of the seal is provided between the seal and the partition wall. 5. The manufacturing method of a lead-acid horizontal battery according to claim 4, wherein the positioning mechanism comprises two limit chutes arranged at both ends of the seal, and the partition walls on both sides of the gap correspond one-to-one When the partition wall is stuck in the limit chute at the opposite end of the seal, the seal can move up and down along the gap. 6. The manufacturing method of a kind of lead-acid horizontal battery according to claim 3, is characterized in that, between the upper and lower two stacked seals, the positive and negative electrodes corresponding to both sides are formed to extend into the filling hole. The bayonet to make the connection. 7 . The manufacturing method of a lead-acid horizontal battery according to claim 1 , wherein the positive and negative plates are formed by applying positive and negative lead pastes on corresponding grids respectively. 8 . 8 . The manufacturing method of a lead-acid horizontal battery according to claim 2 , wherein the cells and the corresponding pole groups are all arranged in a U-shape, an S-shape or a straight line. 9 . 9. the manufacture method of a kind of lead-acid horizontal battery according to claim 2, it is characterised in that the positive plate and the negative plate in the horizontal plate are arranged at horizontal intervals, the positive lug of the positive plate and the negative electrode of the negative plate The ears are located at the above-mentioned intervals and are connected in a one-to-one correspondence.

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