Lead storage battery with current collecting electrodes in different directions and pole plates horizontally stacked and assembling method of lead storage battery

Abstract

The invention relates to the technical field of storage batteries, and discloses a lead storage battery with collector electrodes in different directions and horizontally stacked polar plates and an assembling method thereof.In the battery structure, a tab of a positive plate and a current collector of the positive plate and a tab of a negative plate and a current collector of the negative plate are not in the same direction, and the coating position of a positive isolation plate is always located on one side of the tab of the negative plate; the coating part of the negative isolation plate is always arranged on one side of the positive pole lug; and one positive pole plate and one negative pole plate are overlapped at intervals and are of a horizontal structure. The assembling method is applied to the battery structure. According to the lead storage battery, the defect caused by lug deviation in an existing lead storage battery structure is overcome, the polar plate active matter can output current in a balanced mode in a multi-lug design mode, and the situation that ribs near the lugs are heated due to the fact that the current is too concentrated is avoided. The positive plate and the negative plate are correspondingly coated by the positive isolation plate and the negative isolation plate, so that the problem of short circuit between the positive electrode and the negative electrode is avoided. Through the horizontal stacking structure of the positive plate and the negative plate, the upper and lower concentration difference of the electrolyte is avoided.

Description

Technical Field

[0001] The present application relates to the technical field of storage batteries, and in particular to a lead-acid battery with asymmetrical current collecting electrodes and horizontally stacked plates and an assembly method thereof. Background Art

[0002] Lead-acid batteries are widely used, with advantages such as readily available and cheap raw materials, mature industrial production supporting facilities, safety and reliability, large capacity, and high discharge intensity. Moreover, among many batteries, only lead-acid batteries have a recycling efficiency of up to 96-99%. In the context of the rapid development of large-capacity energy storage projects in recent years, lead-acid batteries have added more application environments.

[0003] After more than 100 years of technological and industrial progress, the lead-acid battery manufacturing industry has laid a good material industry foundation, and many advanced supporting materials have been widely used in the manufacturing industry. A series of technological advances, such as the use of ABS materials for battery shells and AGM diaphragms, the development of grids from hot casting to cold rolling and continuous punching, and the colloidization of sulfuric acid liquid, have injected vitality into the lead-acid battery manufacturing industry.

[0004] Lead-acid batteries have made continuous progress in material application and many improvements in technology. In traditional lead-acid batteries, the pole group and the tab are welded into the current collector, which is prone to false welding, affecting the conductivity and poor battery consistency. Nowadays, the use of molten cast welding has greatly improved the above defects. In terms of isolation plates, since foam rubber, PP film, PE film, PVC and other materials are relatively hard, the plates are loose during assembly and the active substances are easy to fall off. The AGM isolation plate is elastic and can be tightly assembled by coating the plates and applying a certain pressure to solve the above problems.

[0005] It can be seen that the assembly and application technology used in traditional lead-acid battery manufacturing is basically structured as follows: the positive and negative plates are vertically spaced, the plate tabs face upward, the positive and negative tabs are on both sides in the same direction, the separator opening is in the same direction as the tabs, and the tabs are welded into collectors to draw out current. This structure can be used to make batteries of different capacities by increasing or decreasing the number of plates.

[0006] However, the disadvantages of this structure are as follows:

[0007] (1) The tabs of the battery plates are offset. When high power is output, the size and distribution of the current collector are limited, and the utilization of the active materials at the far end of the plate from the tabs is reduced, which reduces the discharge energy of the battery.

[0008] (2) Because the current is too concentrated near the ear, the local rib load increases and generates high temperature, which accelerates the corrosion rate and shortens the life.

[0009] (3) As the plate frame continues to grow during battery use, the openings of the isolation plates in the structure are all facing the direction of the tabs connecting to the current collector, which can easily cause short circuits by contacting the tabs or current collectors of different poles.

[0010] (4) Since the plates are arranged vertically, the sulfuric acid and water that make up the electrolyte will have a concentration difference when stored due to the large difference in specific gravity, causing the same-pole potential difference discharge (self-discharge) to affect the capacity.

[0011] Therefore, a kind of improved lead-acid battery is badly needed. Summary of the invention

[0012] The purpose of the present application is to provide a lead-acid battery with a plurality of current collecting electrodes in different directions and horizontally stacked plates and an assembly method thereof, so as to solve the technical problems raised in the above background.

[0013] To achieve the above objectives, this application discloses the following technical solutions:

[0014] In a first aspect, the present application discloses a lead-acid battery with current collecting electrodes in different directions and horizontally stacked plates, including a positive plate, a positive current collector, a positive separator, a positive electrode tab, a negative plate, a negative current collector, a negative separator and a negative electrode tab;

[0015] The positive electrode separator is coated on the positive electrode plate to form a positive electrode group, and after coating the positive electrode plate, the positive electrode separator is formed with an opening side and a coating bending portion, and the negative electrode separator is coated on the negative electrode plate to form a negative electrode group, and after coating the negative electrode plate, the negative electrode separator is formed with an opening side and a coating bending portion;

[0016] One side of each of the positive plates extends outward to form a positive electrode tab, and each of the positive electrode tabs is welded to the positive current collector; one side of each of the negative plates extends outward to form a negative electrode tab, and each of the negative electrode tabs is welded to the negative current collector; the positive electrode tabs and the negative electrode tabs are arranged in opposite directions;

[0017] In this type of lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates, a positive electrode group and a negative electrode group are arranged adjacent to each other, and the positive electrode group and the negative electrode group are arranged horizontally; the coated bent portion of the positive electrode separator is located on one side of the negative electrode ear, and the coated bent portion of the negative electrode separator is located on one side of the positive electrode ear.

[0018] Preferably, the positive electrode separator and the negative electrode separator are U-shaped, the positive electrode plate is arranged in the U-shaped cavity of the positive electrode separator, and the negative electrode plate is arranged in the U-shaped cavity of the negative electrode separator.

[0019] Preferably, the positive electrode collector and the negative electrode collector are arranged opposite to each other, and the positive electrode tab passes through the opening side of the positive electrode separator and is welded to the positive electrode collector; the negative electrode tab passes through the opening side of the negative electrode separator and is welded to the negative electrode collector.

[0020] In a second aspect, the present application discloses an assembly method of a lead-acid battery with different current collecting electrodes and horizontally stacked polar plates, which is applied to the lead-acid battery with different current collecting electrodes and horizontally stacked polar plates as described above, and the method comprises:

[0021] The positive plate, positive electrode tab and positive electrode current collector of the lead-acid battery are arranged in opposite directions to the negative plate, negative electrode tab and negative electrode current collector;

[0022] The positive plate and the negative plate of the lead-acid battery are arranged horizontally and stacked;

[0023] The coated bent portion formed by the positive electrode separator after coating the positive electrode plate is arranged close to the negative electrode tab, and the coated bent portion formed by the negative electrode separator after coating the negative electrode plate is arranged toward the positive electrode tab.

[0024] Beneficial effects: The lead-acid battery and assembly method thereof with anisotropic current collecting electrodes and horizontally stacked plates of the present application overcome the defects caused by the biased edges of the pole ears in the existing lead-acid battery structure, and can realize a multi-pole ear design to balance the output current of the active materials of the pole plates, and avoid heating of the ribs near the pole ears due to excessive current concentration. In addition, the positive and negative electrodes are covered with the positive and negative plates by the positive and negative separators, thereby avoiding the short circuit problem between the positive and negative electrodes. In addition, the horizontal stacking structure of the positive and negative plates avoids the upper and lower concentration differences of the electrolyte. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For those skilled in the art, other drawings can be obtained based on these drawings without paying any creative work.

[0026] Figure 1 A schematic diagram of the cross-sectional structure of a lead-acid battery with a current collecting electrode in an opposite direction and horizontally stacked plates provided in an embodiment of the present application;

[0027] Figure 2 A partial cross-sectional view of a lead-acid battery with different current collecting electrodes and horizontally stacked plates provided in an embodiment of the present application Figure 1 ;

[0028] Figure 3A partial cross-sectional view of a lead-acid battery with a current collecting electrode in an opposite direction and horizontally stacked plates provided in an embodiment of the present application Figure 2 .

[0029] Figure numerals: 101, positive electrode plate; 102, positive electrode current collector; 103, positive electrode separator; 104, positive electrode tab; 111, negative electrode plate; 112, negative electrode current collector; 113, negative electrode separator; 114, negative electrode tab. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present application are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present application.

[0031] In this article, the term "comprising" is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of more restrictions, the elements defined by the sentence "comprising..." do not exclude the presence of other identical elements in the process, method, article or device including the elements.

[0032] In the first aspect, the present embodiment provides a lead-acid battery with current collecting electrodes in different directions and horizontally stacked plates. In the battery structure, the pole ears of the positive plate and its current collector, and the pole ears of the negative plate and its current collector are not in the same direction. In the battery structure, the coating part of the positive electrode separator is always on the side of the negative electrode ear, and the coating part of the negative electrode separator is always on the side of the positive electrode ear. In the battery structure, a positive plate and a negative plate are stacked and laid flat with each other at an interval.

[0033] Based on the above technical design, in the specific structural design, such as Figure 1-3 As shown, the lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates of this embodiment includes a positive plate 101, a positive current collector 102, a positive separator 103, a positive electrode tab 104, a negative plate 111, a negative current collector 112, a negative separator 113 and a negative electrode tab 114.

[0034] The positive electrode separator 103 is coated on the positive electrode plate 101 to form a positive electrode group, and after coating the positive electrode plate 101, the positive electrode separator 103 is formed with an open side and a coating bend portion, and the negative electrode separator 113 is coated on the negative electrode plate 111 to form a negative electrode group, and after coating the negative electrode plate 111, the negative electrode separator 113 is formed with an open side and a coating bend portion. It is feasible that the positive electrode separator 103 and the negative electrode separator 113 are U-shaped, the positive electrode plate 101 is disposed in the U-shaped cavity of the positive electrode separator 103, and the negative electrode plate 111 is disposed in the U-shaped cavity of the negative electrode separator 113.

[0035] The positive electrode collector 102 and the negative electrode collector 112 are arranged opposite to each other, and one side of each positive electrode plate 101 extends outward to form a positive electrode tab 104, and each positive electrode tab 104 is welded and connected to the positive electrode collector 102; one side of each negative electrode plate 111 extends outward to form a negative electrode tab 114, and each negative electrode tab 114 is welded and connected to the negative electrode collector 112; the positive electrode tab 104 and the negative electrode tab 114 are arranged in different directions. Specifically, the positive electrode tab 104 passes through the open side of the positive electrode separator 103 covering the corresponding positive electrode plate 101 and is welded and connected to the positive electrode collector 102; the negative electrode tab 114 passes through the open side of the negative electrode separator 113 covering the corresponding negative electrode plate 111 and is welded and connected to the negative electrode collector 112.

[0036] Moreover, in this type of lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates, a positive electrode group and a negative electrode group are arranged adjacent to each other, and the positive electrode group and the negative electrode group are arranged horizontally; the coated bent portion of the positive electrode separator 103 is located on the side of the negative electrode ear 114, and the coated bent portion of the negative electrode separator 113 is located on the side of the positive electrode ear 104.

[0037] In a second aspect, the present embodiment provides an assembly method for a lead-acid battery with different current collecting electrodes and horizontally stacked polar plates, which is applied to the lead-acid battery with different current collecting electrodes and horizontally stacked polar plates as described above, and is characterized in that the method comprises:

[0038] The positive electrode plate 101, the positive electrode tab 104 and the positive electrode current collector 102 of the lead-acid battery are arranged in opposite directions to the negative electrode plate 111, the negative electrode tab 114 and the negative electrode current collector 112;

[0039] The positive electrode plate 101 and the negative electrode plate 111 of the lead-acid battery are arranged horizontally and stacked;

[0040] The coated bent portion formed by the positive electrode separator 103 after coating the positive electrode plate 101 is arranged close to the negative electrode tab 114 , and the coated bent portion formed by the negative electrode separator 113 after coating the negative electrode plate 111 is arranged toward the positive electrode tab 104 .

[0041] Compared with the traditional lead-acid battery technology, the lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates and its assembly method overcome the defects caused by the biased edges of the pole ears in the existing lead-acid battery structure, and can realize the form of multi-pole ear design to make the plate active material output current evenly, avoiding the heating of the ribs near the pole ears due to excessive current concentration. In addition, the positive and negative electrodes are covered with the positive and negative plates by the positive and negative separators, avoiding the short circuit problem between the positive and negative electrodes. And, the horizontal stacking structure of the positive and negative plates avoids the upper and lower concentration differences of the electrolyte.

[0042] Finally, it should be noted that the above is only a preferred embodiment of the present application and is not intended to limit the present application. Although the present application has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A lead-acid battery with current collecting electrodes in opposite directions and horizontally stacked plates, characterized in that: It comprises a positive electrode plate (101), a positive electrode current collector (102), a positive electrode separator (103), a positive electrode tab (104), a negative electrode plate (111), a negative electrode current collector (112), a negative electrode separator (113) and a negative electrode tab (114); The positive electrode separator (103) is coated on the positive electrode plate (101) to form a positive electrode group, and after coating the positive electrode plate (101), the positive electrode separator (103) is formed with an opening side and a coating bending portion, and the negative electrode separator (113) is coated on the negative electrode plate (111) to form a negative electrode group, and after coating the negative electrode plate (111), the negative electrode separator (113) is formed with an opening side and a coating bending portion; One side of each positive electrode plate (101) extends outward to form a positive electrode tab (104), and each positive electrode tab (104) is welded to the positive electrode collector (102); one side of each negative electrode plate (111) extends outward to form a negative electrode tab (114), and each negative electrode tab (114) is welded to the negative electrode collector (112); the positive electrode tab (104) and the negative electrode tab (114) are arranged in opposite directions; In this lead-acid battery with anisotropic current collecting electrodes and horizontally stacked electrode plates, a positive electrode group and a negative electrode group are arranged adjacent to each other, and the positive electrode group and the negative electrode group are arranged horizontally; the coated bent portion of the positive electrode separator (103) is located on one side of the negative electrode tab (104), and the coated bent portion of the negative electrode separator (113) is located on one side of the positive electrode tab (114).

2. The lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates according to claim 1, characterized in that: The positive electrode separator (103) and the negative electrode separator (113) are U-shaped, the positive electrode plate (101) is arranged in the U-shaped cavity of the positive electrode separator (103), and the negative electrode plate (111) is arranged in the U-shaped cavity of the negative electrode separator (113).

3. The lead-acid battery with anisotropic current collecting electrodes and horizontally stacked plates according to claim 1, characterized in that: The positive electrode collector (102) and the negative electrode collector (112) are arranged opposite to each other; the positive electrode tab (104) passes through the opening side of the positive electrode separator (103) and is welded to the positive electrode collector (102); the negative electrode tab (114) passes through the opening side of the negative electrode separator (113) and is welded to the negative electrode collector (112).

4. An assembly method for a lead-acid battery with current collecting electrodes in different directions and horizontally stacked plates, applied to the lead-acid battery with current collecting electrodes in different directions and horizontally stacked plates as claimed in any one of claims 1 to 3, characterized in that: The positive electrode plate (101), the positive electrode tab (104) and the positive electrode current collector (102) of the lead-acid battery are arranged in opposite directions to the negative electrode plate (111), the negative electrode tab (114) and the negative electrode current collector (112); The positive electrode plate (101) and the negative electrode plate (111) of the lead storage battery are arranged in a horizontally stacked manner; The coated bent portion formed by the positive electrode separator (103) after coating the positive electrode plate (101) is arranged close to the negative electrode tab (114), and the coated bent portion formed by the negative electrode separator (113) after coating the negative electrode plate (111) is arranged toward the positive electrode tab (104).

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