CN215418503U - Single-pole-lug and double-pole-lug structure lead-acid storage battery - Google Patents

Abstract

The utility model relates to a lead-acid storage battery with a single-pole and double-pole ear structure, belongs to the technical field of lead storage batteries, and is used for solving the problems of uneven current distribution inside a polar plate of the conventional lead storage battery and short cycle life of the battery. The lead-acid storage battery comprises a single-lattice battery, wherein the single-lattice battery comprises a plurality of positive plates and a plurality of negative plates which are alternately stacked; each positive plate and each negative plate respectively comprise a frame and a lug, and the frame comprises an upper frame, a lower frame, a left frame and a right frame; the tabs of each positive plate comprise a first tab and a second tab, and the first tab and the second tab are symmetrically arranged on the upper frame along the length direction of the upper frame; the number of the pole lugs of each negative plate is 1, the pole lugs are called as unipolar lugs, and the unipolar lugs are positioned in the middle of the upper frame of the negative plates; the distance d between the first tab and the second tab is related to the width w of the monopole tab and the length L1 of the upper frame as follows: l1 is more than or equal to d and more than w. The lead-acid storage battery has long service life.

Description

Single-pole-lug and double-pole-lug structure lead-acid storage battery

Technical Field

The utility model relates to the field of lead-acid storage batteries, in particular to a single-pole and double-pole lug structure lead-acid storage battery.

Background

Lead-acid batteries have been invented for over one hundred years and are one of the most widely used chemical power sources worldwide. The raw materials are rich in sources, low in price and renewable and recyclable. The accumulator consists of positive and negative plates, partition board, battery case and other parts, and the plate consists of plate grid and active matter. The grid design needs easy forging, and the grid surface has good contact and mechanical requirements with active substances, and the current is uniformly distributed in the whole polar plate, and the ohmic voltage drop is minimum. At present, a storage battery grid in the market is generally a single-pole lug grid, positive and negative grid lugs are arranged on one side of the grid, and the battery with the design can cause uneven utilization rate of active substances on the upper part and the lower part of a polar plate and cause concentration difference of upper electrolyte and lower electrolyte, thereby seriously influencing the service life of the battery. If large current charging and discharging is carried out, the internal resistance is increased sharply, and thermal runaway may be caused, and the storage battery may be damaged.

SUMMERY OF THE UTILITY MODEL

In view of the above analysis, the present invention aims to provide a single-double-tab lead-acid battery, which can solve at least one of the following problems: (1) the current distribution in the existing lead-acid storage battery pole plate is not uniform, the ohmic voltage drop is large, the cycle life of the battery is short, and (2) the cost of the battery is high; (3) the preparation of the battery is complicated.

On one hand, the utility model provides a single-pole and double-pole ear structure lead-acid storage battery, which comprises a single-lattice battery, wherein the single-lattice battery comprises a plurality of positive plates and a plurality of negative plates which are alternately stacked; each positive plate and each negative plate respectively comprise a frame and a lug, and the frame comprises an upper frame, a lower frame, a left frame and a right frame;

the tabs of each positive plate comprise a first tab and a second tab, and the first tab and the second tab are symmetrically arranged on the upper frame along the length direction of the upper frame; the planes of the first lug and the second lug are parallel to the plate surface of the positive plate;

the number of the pole lugs of each negative plate is 1, the pole lugs are called as unipolar lugs, the unipolar lugs are located in the middle of the upper frame of the negative plates, and the plane where the unipolar lugs are located is parallel to the plate surface of the negative plates;

the relationship between the distance d between the first tab and the second tab, the width w of the unipolar tab, and the length L1 of the upper frame is as follows: l1 is more than or equal to d and more than w.

Furthermore, a plurality of ribs which are crossed transversely and vertically are arranged in the frames of the positive plate and the negative plate.

Furthermore, in the negative plate, the ribs comprise a plurality of first ribs transversely distributed along the plate surface and a plurality of second ribs longitudinally distributed along the plate surface, and the first ribs and the second ribs are vertically intersected.

Furthermore, in the positive plate, the rib includes many first ribs and many second ribs that longitudinally distribute along the utmost point face that transversely distribute along the utmost point face, first rib and second rib intersect perpendicularly.

Further, in the positive plate, the rib includes many first ribs along utmost point face transverse distribution and many second ribs along utmost point face longitudinal distribution, and the second rib that is located on the perpendicular bisector of the last frame of positive plate is the rectangle, and the shape of remaining second rib is: along the direction of keeping away from last frame, the width of second rib reduces gradually.

Further, the remaining second ribs are trapezoidal in shape.

Furthermore, in the positive plate, each first rib is in a V shape, and the opening faces the upper frame.

Furthermore, in the positive plate, the first ribs are distributed in a manner of being sparse at the upper part and dense at the lower part.

Further, in the positive electrode plate, the width of the first ribs is not completely the same.

Furthermore, in the positive plate, the widths of the first ribs of the upper part are the same, the widths of the first ribs of the lower part are the same, and the width of the first ribs of the upper part is greater than that of the first ribs of the lower part; the number of the first ribs of the upper part accounts for 1/4-1/2 of the total first ribs.

Compared with the prior art, the utility model can realize at least one of the following beneficial effects:

(1) the single-pole lug is positioned in the middle of the upper frame of the negative plate, the two lugs of the positive plate are symmetrically positioned on the left side and the right side of the upper frame of the positive plate, the current of the whole plate surface is uniformly distributed, the potential loss is reduced, the generation of heat of the battery can be reduced during large-current charging and discharging, the high-power work of the battery is facilitated, and the service life of the battery is prolonged.

(2) The distance between the two lugs of the positive plate is controlled to be larger than the width of the single lug of the negative plate, so that the situation that the lugs of the positive plate and the negative plate are too close to facilitate the welding of a bus bar is prevented.

(3) The second ribs on the perpendicular bisector of the upper frame in the positive plate of the single-double-lug structure lead-acid storage battery are rectangular, play a role of reinforcing ribs and can improve the creep resistance of the middle part of the positive plate; the rest second ribs are thick at the top and thin at the bottom, so that the corrosion resistance and the current collection effect of the upper part can be facilitated.

(4) In the positive plate of the single-pole and double-pole ear structure lead-acid storage battery, the first ribs are V-shaped, so that the creep resistance of a grid can be improved; the first ribs are distributed in a manner of being sparse at the upper part and dense at the lower part, so that the utilization rate of active substances at the bottom of the polar plate is improved; the first rib of upper portion is thicker, and the first rib of lower part is thinner can be under the prerequisite that reduces the corruption of rib, reduce cost.

(5) The thickness of the negative plate of the single-pole and double-pole ear structure lead-acid storage battery is smaller than that of the positive plate, and the number of the ribs of the negative plate is smaller than that of the ribs of the positive plate; the production cost can be reduced on the premise of ensuring the performance of the battery, and the economic benefit is remarkable.

In the utility model, the technical schemes can be combined with each other to realize more preferable combination schemes. Additional features and advantages of the utility model will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model. The objectives and other advantages of the utility model will be realized and attained by the structure particularly pointed out in the written description and drawings.

Drawings

The drawings are only for purposes of illustrating particular embodiments and are not to be construed as limiting the utility model, wherein like reference numerals are used to designate like parts throughout.

Fig. 1 is a schematic structural view of a unipolar lug grid of example 1;

fig. 2 is a schematic structural diagram of a double-tab grid of embodiment 2;

fig. 3 is a schematic structural diagram of a double-tab grid of example 3;

FIG. 4a is a schematic structural view of a battery according to example 4;

FIG. 4b is a schematic structural view of a battery according to example 4;

fig. 5 is a schematic structural view of a battery according to example 4;

fig. 6 is a schematic structural view of a battery according to example 4;

fig. 7 is an internal view of a conventional 1 × 6 structure battery fabricated with a monopolar ear plate;

FIG. 8 is a schematic of the cycling performance of the cell;

fig. 9 is a graph comparing the temperature distribution of batteries prepared from examples of the present invention and conventional monopolar ear plates.

Reference numerals:

1-frame, 2-single-pole lug, 31-first lug, 32-second lug, 4-rib, 41-first rib, 42-second rib, 5-positive bus bar, 6-positive wiring column, 7-negative bus bar and 8-negative wiring column.

Detailed Description

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which form a part hereof, and which together with the embodiments of the utility model serve to explain the principles of the utility model and not to limit its scope.

The utility model provides a single-pole and double-pole lug structure lead-acid storage battery, which comprises a single-lattice battery, wherein the single-lattice battery comprises a plurality of positive plates and a plurality of negative plates which are alternately stacked; each positive plate and each negative plate respectively comprise a frame 1 and a lug, and the frame 1 comprises an upper frame, a lower frame, a left frame and a right frame; the tabs of each positive plate comprise a first tab 31 and a second tab 32, and the first tab 31 and the second tab 32 are symmetrically arranged on the upper frame along the length direction of the upper frame; the planes of the first lug 31 and the second lug 32 are parallel to the plate surface of the positive plate; the number of the lugs of each negative plate is 1, the lugs are called as unipolar lugs 2, the unipolar lugs 2 are positioned in the middle of the upper frame of the negative plates, and the plane where the unipolar lugs 2 are positioned is parallel to the plate surface of the negative plates; the distance d between the first tab 31 and the second tab 32 (d refers to the distance between the two nearest edges of the first tab 31 and the second tab 32, and both are referred to hereinafter) is related to the width w of the monopole 2 and the length L1 of the upper frame as follows: l1 is more than or equal to d and more than w.

Compared with the prior art, the single-pole and double-pole lug structure lead-acid storage battery provided by the utility model has the advantages that by optimizing the pole lug structure, the single pole lug of the negative plate is positioned in the middle of the upper frame of the negative plate, the two pole lugs of the positive plate are symmetrically positioned on the left side and the right side of the upper frame of the positive plate, the current distribution of the whole pole plate surface is uniform, the potential loss is reduced, the generation of battery heat can be reduced during large-current charging and discharging, the high-power work of the battery is facilitated, and the service life of the battery is prolonged. And the distance between the two lugs of the positive plate is controlled to be larger than the width of the single lug of the negative plate, so that the situation that the lugs of the positive plate and the negative plate are too close to facilitate the welding of a bus bar is prevented.

Specifically, the thickness of the single-pole lug 2, the first pole lug 31 and the second pole lug 32 is smaller than that of the frame 1.

Specifically, the length of the upper frame is L1, and the distance between the first tab 31 and the second tab 32 is d, so that considering that d is too small, the first tab 31 and the second tab 32 are approximately overlapped, which is not beneficial to specific manufacturing. Therefore, L1 is controlled to be larger than or equal to d and larger than or equal to 5 mm.

Specifically, all set up many horizontal vertical cross's rib 4 in the frame 1 of positive plate and negative plate, rib 4 has at 1 inside distribution mode in frame: the ribs 4 are distributed in a transverse direction along the pole plate direction, a longitudinal direction along the pole plate direction, and a certain angle (for example, 10 °, 20 °, 30 °, 40 °, 50 °, 60 °, 70 °, 80 °) with the upper frame, and the distribution mode of the ribs 4 is not limited thereto, and can be specifically set according to design requirements.

In a possible design, in the negative plate, the ribs 4 comprise a plurality of first ribs 41 distributed along the transverse direction of the plate surface and a plurality of second ribs 42 distributed along the longitudinal direction of the plate surface, and the first ribs 41 and the second ribs 42 are intersected vertically.

Specifically, in the positive plate, the ribs 4 include a plurality of first ribs 41 distributed along the transverse direction of the plate surface and a plurality of second ribs 42 distributed along the longitudinal direction of the plate surface, and the first ribs 41 and the second ribs 42 are perpendicularly intersected.

Preferably, in the positive plate, the ribs 4 comprise a plurality of first ribs 41 distributed along the transverse direction of the plate surface and a plurality of second ribs 42 distributed along the longitudinal direction of the plate surface; the second ribs 42 positioned on the perpendicular bisector of the upper frame of the positive plate are rectangular, play a role of reinforcing ribs, and can improve the creep resistance of the middle part of the plate (once the plate grows in creep, the plate can be pushed onto the busbar, and short circuit failure can occur); the remaining second ribs 42 are shaped: in a direction away from the upper frame, the width of the second ribs 42 gradually decreases, that is, the upper end is thicker and the width gradually decreases downward, and in an exemplary shape, the second ribs 42 are trapezoidal, and the side length of the side close to the upper frame is larger than the side length of the side away from the tab. The arrangement of the second ribs 42 with a thick upper part and a thin lower part can facilitate the corrosion resistance and the current collecting effect of the upper part.

Specifically, the side length difference between the upper side length and the lower side length of the second ribs 42 is 0.6-1.5 mm.

Preferably, in the positive plate, each first rib 41 is in a V-shape, the opening faces the upper frame, and the creep resistance of the grid can be improved by the V-shape of the first rib 41. Illustratively, the included angle of the V-shape is 90 ° or more and less than 180 °.

Preferably, in the positive plate, the distribution of the first ribs 41: along the direction of keeping away from last frame, from top to bottom the interval of arranging dwindles gradually, first rib 41's distribution is dredged from top to bottom closely promptly, along the direction of keeping away from last frame promptly, and the distance between two adjacent first ribs 41 reduces gradually, so sets up, is favorable to improving polar plate bottom active material's utilization ratio. Illustratively, the distance between two adjacent first ribs 41 is 9-2 mm.

In view of the fact that the ribs are more corroded due to the more severe reaction at the upper portion of the plate, and thus, in order to reduce the cost while reducing the corrosion of the ribs, it is preferable that the width of the first ribs 41 is not exactly the same in the positive plate.

In one possible design, the width of the first ribs of the upper part is the same, the width of the first ribs of the lower part is the same, and the width of the first ribs of the upper part is greater than that of the first ribs of the lower part along the direction away from the upper frame; illustratively, the number of first ribs of the upper portion is 1/4-1/2 of the total first ribs.

In one possible design, the width of the first ribs decreases gradually in a direction away from the upper rim.

Specifically, in the negative plate, the thickness of unipolar ear 2 slightly is less than the thickness of the last frame 1 of negative plate, and exemplarily, the difference between the thickness of the last frame 1 of negative plate and the thickness of unipolar ear 2 is 0.5 ~ 3 mm. The width and height of the monopolar ear 2 are designed according to the specific battery model, and the dimensions of the monopolar ear 2 are 5mm wide and 10mm high, for example.

Specifically, in the positive plate, the first tab 31 and the second tab 32 have the same size, specifically, the first tab 31 and the second tab 32 have the same size according to the design of a specific battery model, and illustratively, the height of the first tab 31 and the height of the second tab 32 are 10 mm. Specifically, the thickness of the first tab 31 and the second tab 32 is slightly smaller than the thickness of the upper frame 1 of the positive plate, and the difference between the thickness of the upper frame 1 of the positive plate and the thickness of the first tab 31 and the second tab 32 is 0.5-3 mm. Illustratively, the first tab 31 and the second tab 32 are 5mm wide and 10mm high.

Specifically, considering that the utilization rate of the positive plate is high in the use of the lead-acid storage battery, the thickness of the negative plate can be set to be smaller than that of the positive plate, and the number of the ribs of the negative plate is smaller than that of the positive plate in order to reduce the cost. Specifically, considering that the performance of the battery cannot be ensured when the thickness of the negative plate is too small, the thickness of the negative plate is controlled to be 80-95% of that of the positive plate; the number of the ribs of the negative plate is 80-95% of that of the positive plate; so set up, can be under the prerequisite of guaranteeing the battery performance reduction in production cost, economic benefits is showing.

Specifically, in the single-cell battery, in the positive plate, the top end of the first tab 31 is a first positive bus bar, and the first positive bus bar connects a plurality of first tabs together in parallel; the top end of the second pole lug 32 is provided with a second positive electrode bus bar which connects the plurality of second pole lugs 32 together in parallel; the top end of the single-pole lug 2 of the negative plate is provided with a negative bus bar which connects the single-pole lugs 2 of the negative plates in parallel; the first tabs 31 of the positive plates are connected with the positive wiring column through a first positive bus bar, and the second tabs 32 of the positive plates are connected with the positive wiring column through a second positive bus bar; the single-pole lug 2 of each negative plate is connected with a negative binding post through a negative bus bar.

Optionally, the structural relationship of the tabs of the positive plate and the negative plate of the single-cell battery can be interchanged.

Specifically, the single-pole lead-acid battery with the double-pole ear structure can comprise 1 or more single-lattice batteries, and when the single-pole lead-acid battery with the double-pole ear structure comprises a plurality of single-lattice batteries, the single-lattice batteries can be connected in series to obtain lead-acid batteries with different specifications.

Specifically, the nominal voltage of the single-cell battery is 2.0V, the single-cell battery can be discharged to 1.7V and can be charged to 2.5V, and in application, 6 single-cell batteries can be connected in series to form a lead-acid storage battery with the nominal voltage of 12V. A plurality of single cells can also be connected in series to form lead-acid storage batteries with the nominal values of 24V, 36V, 48V and the like.

Specifically, the 6 unit cells may be connected in series in a 1 × 6 structure, a 2 × 3 structure, or a 3 × 2 structure.

The lead-acid storage battery can be used as a power battery, and the power battery is generally discharged at a discharge rate of about 0.5C and charged at about 0.25C. Under the multiplying power, the ion migration between the positive and negative plates has large interaction influence, and the arrangement of the lugs and the ribs needs to be specially designed.

The power battery is different from a battery for starting an automobile, and the battery for starting the automobile needs instantaneous large current output capacity, so in the aspect of rib distribution of the positive plate, the internal resistance of the ribs is the lowest as a main design principle, radial rib distribution is generally adopted, and as the discharge time is extremely short, the interaction influence generated by ion migration between the positive electrode and the negative electrode in the discharge process can be small, and the relative position influence of the positive electrode and the negative electrode is small.

The power battery is different from a colloid energy storage battery, the colloid energy storage battery generally adopts low-rate discharge below 10hr, the interaction influence of the ion migration rate on the positive electrode and the negative electrode is small, and therefore the relative position influence of the positive electrode lug and the negative electrode lug is small.

Compared with the prior art, the single-pole lug of the single-pole and double-pole lug structure lead-acid storage battery is positioned in the middle of the upper frame of the negative plate, the two poles of the positive plate are symmetrically positioned on the left side and the right side of the upper frame of the positive plate, the current of the whole plate surface is uniformly distributed, the potential loss is reduced, the generation of battery heat can be reduced during large-current charging and discharging, the high-power work of the battery is facilitated, and the service life of the battery is prolonged.

And the distance between the two lugs of the positive plate is controlled to be larger than the width of the single lug of the negative plate, so that the situation that the lugs of the positive plate and the negative plate are too close to facilitate the welding of a bus bar is prevented.

The second ribs on the perpendicular bisector of the upper frame in the positive plate of the single-double-lug structure lead-acid storage battery are rectangular, play a role of reinforcing ribs and can improve the creep resistance of the middle part of the positive plate; the rest second ribs are thick at the top and thin at the bottom, so that the corrosion resistance and the current collection effect of the upper part can be facilitated.

In the positive plate of the lead-acid storage battery, the first ribs are V-shaped, so that the creep resistance of the grid can be improved; the first ribs are distributed in a manner of being sparse at the upper part and dense at the lower part, so that the utilization rate of active substances at the bottom of the polar plate is improved; the first rib of upper portion is thicker, and the first rib of lower part is thinner can be under the prerequisite that reduces the corruption of rib, reduce cost.

The thickness of the negative plate of the single-pole and double-pole ear structure lead-acid storage battery is smaller than that of the positive plate, and the number of the ribs of the negative plate is smaller than that of the ribs of the positive plate; the production cost can be reduced on the premise of ensuring the performance of the battery, and the economic benefit is remarkable.

In order to embody the beneficial effects of the lead-acid storage battery with the single-pole and double-pole lug structure, the inventor compares a plurality of typical schemes in the research process of the inventor, as follows.

Example 1

The embodiment provides a grid (hereinafter referred to as grid) for a lead-acid storage battery, as shown in fig. 1, the grid includes a frame 1 and tabs, and the frame 1 includes an upper frame, a lower frame, a left frame and a right frame; the number of the pole lugs is 1, the pole lugs are called as unipolar lugs 2, the unipolar lugs 2 are located in the middle of the upper frame, and the plane where the unipolar lugs 2 are located is parallel to the plane of the grid. The width of the single-pole ear 2 is 5mm, the height is 10mm, the thickness of the single-pole ear 2 is slightly smaller than that of the frame 1, and the difference between the thickness of the frame 1 and the thickness of the single-pole ear 2 is 1 mm.

The frame 1 is internally provided with a plurality of ribs 4 which are crossed transversely and vertically, each rib 4 comprises a plurality of first ribs 41 which are distributed transversely along the polar plate direction and a plurality of second ribs 42 which are distributed longitudinally along the polar plate direction, and the first ribs 41 and the second ribs 42 are crossed vertically.

Example 2

The embodiment provides a grid (hereinafter referred to as grid) for a lead-acid storage battery, as shown in fig. 2, the grid includes a frame 1 and tabs, and the frame 1 includes an upper frame, a lower frame, a left frame and a right frame; the tab comprises a first tab 31 and a second tab 32, and the first tab 31 and the second tab 32 are the same in size; along the length direction of the upper frame of the grid, a first lug 31 and a second lug 32 are symmetrically arranged on the outer side of the upper frame, and the planes of the first lug 31 and the second lug 32 are parallel to the surface of the grid; the distance between the first tab 31 and the second tab 32 is d, the width of the first tab 31 is w, the length of the frame 1 is L1, and L1 is d +2 w. For example, w is 3mm, L1 is 66mm, and d is 60 mm.

Specifically, still set up many ribs 4 in the frame 1, rib 4 includes many first ribs 41 along the horizontal distribution of polar plate face and many second ribs 42 along the vertical distribution of polar plate face, and first rib 41 and second rib 42 intersect perpendicularly.

Example 3

The embodiment provides a grid (hereinafter referred to as grid) for a lead-acid storage battery, as shown in fig. 3, the grid includes a frame 1 and tabs, and the frame 1 includes an upper frame, a lower frame, a left frame and a right frame; the tabs include a first tab 31 and a second tab 32; along the length direction of the upper frame of the grid, a first lug 31 and a second lug 32 are symmetrically arranged on the outer side of the upper frame, and the planes of the first lug 31 and the second lug 32 are parallel to the surface of the grid; the distance between the first tab 31 and the second tab 32 is d, the width of the first tab 31 is w, the length of the frame 1 is L1, and L1 is d +2 w. For example, w is 3mm, L is 66mm, and d is 60 mm.

Specifically, a plurality of ribs 4 are further arranged in the frame 1, each rib 4 comprises a plurality of first ribs 41 transversely distributed along the pole plate surface and a plurality of second ribs 42 longitudinally distributed along the pole plate surface, the second ribs 42 on the perpendicular bisector of the upper frame are rectangular and play a role of reinforcing ribs, and the rest second ribs 42 are in a trapezoid shape with a thick upper part and a thin lower part; each first rib 41 is in a V shape, and the included angle of the V shape is 150 °. The first ribs 41 are distributed in a manner that the upper part is sparse and the lower part is dense; the width of the first ribs of the upper part is the same, the width of the first ribs of the lower part is the same, and the width of the first ribs of the upper part is greater than that of the first ribs of the lower part; the number of first ribs of the upper portion is 5/13 of the total first ribs.

Example 4

The embodiment provides a single and double-lug structure lead-acid storage battery, the single and double-lug structure lead-acid storage battery comprises a single-lattice battery, as shown in fig. 4a, the single-lattice battery comprises a plurality of positive plates and negative plates which are alternately stacked, the negative plates adopt the grid structure of embodiment 2, the positive plates adopt the grid structure of embodiment 1, the single-lattice battery of the embodiment is formed by connecting 4 positive plates and 5 negative plates in parallel, the lugs are connection points of the plates, namely, each plate is to lead out or input current through respective lugs, the top of the lug of the positive plate is a positive busbar 5, the top of the lug of the negative plate is a negative busbar 7, and the lugs of each plate in the single-lattice battery are connected in parallel through the busbar. The number of the positive plates and the number of the negative plates can be 4, and the number of the positive plates and the number of the negative plates can also be 5 and 6, and the specific conditions are determined according to the capacity and the model of the battery.

The lead-acid storage battery with the nominal voltage of 12V is formed by connecting the 6 single cells in series in the embodiment. The tabs of the positive plates are connected with a positive terminal 6 through a positive busbar 5, and the tabs of the negative plates are connected with a negative terminal 8 through a negative busbar 7. It should be noted that the way of connecting the 6 cells in series can be a 1 × 6 structure (fig. 4a, labeled as 4-1#), a 2 × 3 structure (fig. 5, labeled as 4-2#), or a 3 × 2 structure (fig. 6, labeled as 4-3 #).

In this embodiment, as shown in fig. 4b, the positive electrode plate of the cell may have the grid structure of embodiment 2, and the negative electrode plate may have the grid structure of embodiment 1. The 6 cells may be connected in series in a 1 × 6 configuration (fig. 4b, labeled 4-4#), a 2 × 3 configuration (labeled 4-5#), or a 3 × 2 configuration (labeled 4-6 #).

Example 5

This embodiment provides a single two utmost point ear structure lead acid battery, single two utmost point ear structure lead acid battery includes the cell, the cell includes a plurality of positive plates and the negative plate of range upon range of setting in turn, the positive plate of cell adopts the grid structure of embodiment 3, the negative plate of cell adopts the grid structure of embodiment 1, the cell of this embodiment is that 4 positive plates and 5 negative plates are parallelly connected to form, the utmost point ear is exactly the tie point of these polar plates, every polar plate all will derive or input the electric current through respective utmost point ear, the top of the utmost point ear of positive plate is anodal busbar 5, the top of the utmost point ear of negative plate is negative busbar 7, connect in parallel together through the utmost point ear of each polar plate in the cell again through the busbar. Specifically, in the positive plate, the top end of the first tab 31 is a first positive busbar, and the first positive busbar connects a plurality of first tabs together in parallel; the top end of the second pole lug 32 is provided with a second positive electrode bus bar which connects the plurality of second pole lugs 32 together in parallel; the top end of the single-pole lug 2 of the negative plate is provided with a negative bus bar which connects the single-pole lugs 2 of the negative plates in parallel; the first tabs 31 of the positive plates are connected with the positive wiring column through a first positive bus bar, and the second tabs 32 of the positive plates are connected with the positive wiring column through a second positive bus bar; the single-pole lug 2 of each negative plate is connected with a negative binding post through a negative bus bar.

The lead-acid storage battery is a lead-acid storage battery with the nominal voltage of 12V in the application, and therefore the lead-acid storage battery with the nominal voltage of 12V is formed by connecting the 6 single cells in series. It should be noted that the way of connecting the 6 cells in series may be a 1 × 6 structure (labeled as 5-1#), a 2 × 3 structure (labeled as 5-2#), or a 3 × 2 structure (labeled as 5-3 #).

In this embodiment, the design of the ribs and the shape of the negative electrode plate may be the same as the design of the ribs and the shape of the positive electrode plate.

Fig. 8 is a schematic diagram showing the cycle performance of the battery, wherein 1# is a 1 × 6 battery prepared by a conventional monopolar ear plate (as shown in fig. 7), and 2# is a 1 × 6 battery structure of 4-4%. The others are kept consistent and cycled, and from the above figures, it can be seen that the cycling performance of the battery of the present invention is superior to that of the conventional monopolar ear battery.

Fig. 9 is a schematic diagram showing the temperature distribution of the battery, in fig. 9, the left diagram is a schematic diagram showing the results of the battery prepared by the conventional unipolar ear plate, and the right diagram is a schematic diagram showing the results of the 4-4# battery of the present invention. The temperature distribution in the figure is analyzed, and compared with the battery prepared by the traditional unipolar ear plate, the battery provided by the utility model has the advantages that the plate surface current distribution is uniform, the generated heat is less, the temperature distribution uniformity is good, and the improvement of the battery cycle performance is facilitated.

The performance data of the battery prepared from the conventional unipolar ear plate, the 4-4# battery of example 4, and the 5-1# battery of example 5 are listed in table 1 below, and it can be seen that the performance of the battery of the present invention is significantly better than that of the battery prepared from the conventional unipolar ear plate. The 5-1# battery of the utility model has better performance than the 4-4# battery. Therefore, the shape and the position distribution of the ribs of the positive plate are optimized, so that the performance of the battery can be improved. Specifically, in the positive plate, the second ribs on the perpendicular bisector of the upper frame are rectangular, so that the function of reinforcing ribs is achieved, and the creep resistance of the middle part of the positive plate can be improved; the rest second ribs are thick at the top and thin at the bottom, so that the corrosion resistance and the current collection effect of the upper part can be facilitated. In the positive plate, the first ribs are V-shaped, so that the creep resistance of the grid can be improved; the first ribs are distributed in a manner of being sparse at the upper part and dense at the lower part, so that the utilization rate of active substances at the bottom of the polar plate is improved; the first rib of upper portion is thicker, and the first rib of lower part is thinner can be under the prerequisite that reduces the corruption of rib, reduce cost.

TABLE 1 Performance data for different batteries

Remarking: the improvement in active material utilization and power characteristics in the table are both compared to a battery made from a conventional monopolar ear plate.

In order to reduce the cost, the inventor reduces the thickness of the negative plate of the 5-1# battery structure by 10%, reduces the number of ribs by 6%, and reduces the cycle performance of the battery by 15% or more, which is equivalent to the performance of the 5-1# battery.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.

Claims (10)

1. The lead-acid storage battery with the single-pole and double-pole ear structure is characterized by comprising a single-lattice battery, wherein the single-lattice battery comprises a plurality of positive plates and a plurality of negative plates which are alternately stacked; each positive plate and each negative plate respectively comprise a frame (1) and a lug, and the frame (1) comprises an upper frame, a lower frame, a left frame and a right frame;

the tabs of each positive plate comprise a first tab (31) and a second tab (32), and the first tab (31) and the second tab (32) are symmetrically arranged on the upper frame along the length direction of the upper frame; the plane of the first tab (31) and the plane of the second tab (32) are parallel to the plate surface of the positive plate;

the number of the lugs of each negative plate is 1, the lugs are called as unipolar lugs (2), the unipolar lugs (2) are located in the middle of the upper frame of the negative plate, and the plane where the unipolar lugs (2) are located is parallel to the plate surface of the negative plate;

the distance d between the first tab (31) and the second tab (32) is related to the width w of the monopolar tab (2) and the length L1 of the upper frame as follows: l1 is more than or equal to d and more than w.

2. A lead-acid battery according to claim 1, characterized in that a plurality of ribs (4) are arranged crosswise in the frame (1) of the positive and negative plates.

3. A lead-acid battery according to claim 2, characterized in that in the negative plate the ribs (4) comprise a plurality of first ribs (41) distributed transversely to the plate surface and a plurality of second ribs (42) distributed longitudinally to the plate surface, the first ribs (41) and the second ribs (42) intersecting perpendicularly.

4. A lead-acid battery according to claim 2, characterized in that in the positive plate, the ribs (4) comprise a plurality of first ribs (41) distributed transversely to the plate surface and a plurality of second ribs (42) distributed longitudinally to the plate surface, said first ribs (41) and second ribs (42) intersecting perpendicularly.

5. A lead-acid battery according to claim 2, characterized in that in the positive plate, the ribs (4) comprise a plurality of first ribs (41) distributed transversely along the plate surface and a plurality of second ribs (42) distributed longitudinally along the plate surface, the second ribs (42) located on the perpendicular bisector of the upper frame of the positive plate are rectangular, the remaining second ribs (42) have the shape: the width of the second ribs (42) decreases in a direction away from the upper rim.

6. Lead-acid battery according to claim 5, characterized in that said remaining second ribs (42) have a trapezoidal shape.

7. A lead-acid battery according to claim 5, characterized in that in said positive plate each first rib (41) is V-shaped with its opening facing the upper rim.

8. A lead-acid battery according to claim 5, characterized in that in said positive plate the distribution of the first ribs (41) is open on top and close on bottom.

9. A lead-acid battery according to claim 5, characterized in that in the positive plates the width of the first ribs (41) is not exactly the same.

10. The lead-acid battery of claim 9, wherein in the positive plate, the first ribs of the upper portion have the same width, the first ribs of the lower portion have the same width, and the width of the first ribs of the upper portion is greater than the width of the first ribs of the lower portion; the number of the first ribs of the upper part accounts for 1/4-1/2 of the total first ribs.

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