Lead storage battery grid

Abstract

The utility model relates to the technical field of lead storage batteries, in particular to a lead storage battery grid which comprises a frame, a tab is arranged on one side of the frame, and the other side of the frame is of an arc-shaped structure. A vertical rib and a plurality of arc-shaped ribs are arranged on the frame, the vertical rib extends from the tab to the arc-shaped structure, the arc-shaped ribs are transversely arranged in the frame, and the bending direction of the arc-shaped structure is consistent with that of the arc-shaped ribs; the distance between every two adjacent arc-shaped ribs is sequentially reduced from the tab end to the arc-shaped structure end; the plate grid forms an equipotential surface, and current flows through each position of the plate grid from the tab, so that the consistency of the current density is greatly improved, the utilization rate of active substances borne on the plate grid is more uniform, the corrosion of the plate grid and the argillization of the active substances are delayed, and the service life of the battery is prolonged; in addition, the arc-shaped ribs have the effects of bearing active substances and conducting current, and the corrosion rate of the vertical ribs can be reduced.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lead-acid batteries, and particularly to a grid for a lead-acid battery. Background Art

[0002] The recycling rate of lead-acid batteries can reach over 95%. Due to its low cost, mature technology, stable quality, high reliability, good applicability and many other advantages, it is widely used. A lead-acid battery mainly consists of a positive plate, a negative plate, a separator and an electrolyte. The positive plate and the negative plate are composed of active materials and grids. The grid is a main component of the lead-acid battery and has two important functions: on the one hand, it serves as the "skeleton" of the positive and negative active materials, playing a mechanical support role; on the other hand, it serves as the "blood system" of the plate, playing the role of outputting / inputting current to various parts of the plate. The grid has a direct impact on the strength and service life of the entire plate.

[0003] The utility model with the patent number ZL202321894034.0 discloses a battery grid and a battery, including a quadrilateral frame and a skeleton. The end of the frame is connected with a tab. By designing the skeleton, the contact area between the skeleton and the lead paste is larger, thereby improving the bonding stability between the skeleton and the lead paste. However, for the grid in this utility model, the utilization rate of the active material in the lower part far from the tab is significantly lower than that in the upper part. Coupled with the settlement of sulfuric acid under the action of gravity, the grid in the upper part of the electrode group is corroded faster due to the high utilization rate of the active material and large current density, while the lower part of the electrode group has a low utilization rate of the active material and a high sulfuric acid density, resulting in sulfation phenomenon, which will ultimately accelerate the failure process of the battery. Summary of the Utility Model

[0004] In view of the deficiencies or problems existing in the prior art, the present disclosure provides a grid for a lead-acid battery. The utilization rate of the active material carried on the grid for the lead-acid battery is more uniform, which can effectively delay the corrosion of the grid and the sludging of the active material, and extend the battery life.

[0005] The technical solution adopted by the present disclosure to solve the above technical problems is: a grid for a lead-acid battery, including a frame. One side of the frame is provided with a tab, and the other side of the frame is an arc structure; vertical ribs and a plurality of arc ribs are arranged on the frame. The vertical ribs extend from the tab towards the arc structure, and the arc ribs are horizontally arranged in the frame. The bending direction of the arc structure is the same as that of the arc ribs.

[0006] As a preferred embodiment, the distance between two adjacent arc ribs decreases sequentially from the tab end to the arc structure end.

[0007] As a preferred embodiment, the curvature of the arc ribs decreases sequentially from the tab end to the arc structure end.

[0008] As a preferred embodiment, the frame includes a first side, a second side, and two third sides arranged in parallel. The first side connects the first ends of the two third sides, the second side connects the second ends of the two third sides, the arc structure is arranged on the second side, and the tab is arranged on the first side.

[0009] As a preferred embodiment, the vertical rib is arranged between the two third sides and is parallel to the third sides.

[0010] As a preferred embodiment, the midpoint of the first side is the first midpoint, the midpoint of the second side is the second midpoint, and the vertical rib is arranged on the connection line between the first midpoint and the second midpoint.

[0011] As a preferred embodiment, the connection point of the tab and the first side is located on the connection line between the first midpoint and the second midpoint.

[0012] As a preferred embodiment, the width ratio of the vertical rib to the width of the third side is 1.5:1 to 2:1.

[0013] Preferably, the width ratio of the vertical rib to the width of the third side is 2:1.

[0014] As a preferred embodiment, the tab includes a first part and a second part. The first end of the first part is connected to the first side, the second end of the first part is connected to the second part, and the angle between the first part and the first side is an acute angle or an obtuse angle.

[0015] Compared with existing products, since the other side of the frame is an arc structure, the arc ribs are horizontally arranged in the frame, and the bending direction of the arc structure is the same as that of the arc ribs, making the grid form an equipotential surface. The current flows from the tab through various positions of the grid, greatly improving the consistency of the current density, making the utilization rate of the active material carried on the grid more uniform, delaying the grid corrosion and the sludging of the active material, and thus extending the battery life. In addition, the arc ribs play a role in carrying the active material and conducting the current, and can reduce the corrosion rate of the vertical ribs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The following will further describe the present application in detail with reference to the drawings and preferred embodiments. However, those skilled in the art will understand that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be used to limit the scope of the present application. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0017] Figure 1 is one of the schematic structural diagrams of a lead-acid battery grid of the present disclosure;

[0018] Figure 2is the present disclosure Figure 1 The partial enlarged view at position A in

[0019] Figure 3 is the second schematic structural view of a grid of a lead-acid battery according to the present disclosure;

[0020] Figure 4 is the third schematic structural view of a grid of a lead-acid battery according to the present disclosure.

[0021] Explanation of reference numerals:

[0022] 1, vertical rib; 2, arc rib; 3, ear; 5, first side; 6, second side; 7, third side; 8, first part; 9, second part. Detailed implementation manners

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present disclosure, the present disclosure will be described in detail, clearly and completely below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present disclosure and are not used to limit the present disclosure.

[0024] Those skilled in the art should understand that in the disclosure of the present utility model, the orientation or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientation or positional relationships shown in the accompanying drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the above terms should not be construed as limiting the present utility model.

[0025] Please refer to Figure 1 、 Figure 3 and Figure 4 As shown, the present disclosure provides a grid for a lead-acid battery, including a frame. An ear 3 is provided on one side of the frame, and the other side of the frame is an arc structure. The frame as a whole is a quadrilateral with an arc structure on one side. A vertical rib 1 and several arc ribs 2 are provided on the frame. The vertical rib 1 extends from the ear 3 towards the arc structure. The arc ribs 2 are arranged horizontally in the frame. The curvature of the arc ribs 2 decreases sequentially from the ear 3 end to the arc structure end. The bending direction of the arc structure is the same as the bending direction of the arc ribs 2, so that the grid forms an equipotential surface, and the current flows through each position of the grid from the ear 3, greatly improving the consistency of the current density, making the utilization rate of the active material carried on the grid more uniform, delaying the grid corrosion and the sludging of the active material, thereby prolonging the battery life; in addition, the arc ribs 2 play a role in carrying the active material and conducting the current, and can reduce the corrosion rate of the vertical rib 1.

[0026] On the grid, during the process of current conduction from the tab 3 from top to bottom, the current density gradually decreases. To improve the consistency of the current density between the upper and lower parts of the grid and the consistency of the utilization rate of the active material between the upper and lower parts, the distance between two adjacent arc-shaped ribs 2 in the present disclosure gradually decreases from the tab 3 end to the arc-shaped structure end. By reducing the distance between the arc-shaped ribs 2 on the grid, the current density acting on a unit area is made the same. Coupled with the effect of the equipotential surface, the consistency of the utilization rate of the active material between the upper and lower parts of the grid is further improved.

[0027] Please continue to refer to Figure 3 and Figure 4 As shown, in an embodiment of the present disclosure, the frame includes a first side 5, a second side 6, and two parallel third sides 7. The first side 5 connects the first ends of the two third sides 7, and the second side 6 connects the second ends of the two third sides 7. The arc-shaped structure is arranged on the second side 6, and the tab 3 is arranged on the first side 5. A part of the arc-shaped ribs 2 is connected to the first side 5, and a part of the arc-shaped ribs 2 is connected to the two third sides 7. The vertical ribs 1 are arranged between the two third sides 7 and are parallel to the third sides 7. Specifically, the midpoint of the first side 5 is the first midpoint, the midpoint of the second side 6 is the second midpoint, the vertical ribs 1 are arranged on the connection line between the first midpoint and the second midpoint, and the vertical ribs 1 divide each arc-shaped rib 2 into two symmetric parts. The current density and the utilization rate of the active material of the symmetric parts are the same, thereby further improving the consistency of the current density flowing through each point of the grid and the consistency of the utilization rate of the active material.

[0028] In particular, there is only one vertical rib 1 in the entire grid, which is arranged in the middle of the grid. The width ratio of the vertical rib 1 to the width of the third side 7 is 1.5:1 to 2:1, preferably 2:1. Increasing the width (cross-sectional area) of the vertical rib 1 can reduce the loss during the current conduction process, improve the consistency of the current between the upper and lower parts of the vertical rib 1, thereby improving the consistency of the current density on each arc-shaped rib 2, and at the same time can also improve the corrosion resistance of the vertical rib 1.

[0029] Please refer to Figure 1 and Figure 2As shown, it should be noted that the connection between the tab 3 and the first side 5 is located on the line connecting the first midpoint and the second midpoint, so that the position of the tab 3 corresponds to the position of the vertical rib 1, enabling the vertical rib 1 to conduct current better. Since the tab 3 of the present disclosure is arranged at the middle position of the first side 5, it is very easy for the positive and negative tabs 3 to come into contact. To avoid the contact between the positive and negative tabs 3, an insulating member can be added at the root of the positive and negative tabs 3 to separate the positive and negative tabs 3 by a certain distance using the insulating member. However, since both the positive and negative tabs 3 have a certain length, there is still a possibility that the free ends of the positive and negative tabs 3 come into contact with each other. To avoid the contact of the free ends of the positive and negative tabs 3, preferably, the tab 3 includes a first part 8 and a second part 9. The first part 8 is the root of the tab 3, and the second part 9 is the free end of the tab 3. The first end of the first part 8 is connected to the first side 5, and the second end of the first part 8 is connected to the second part 9. The angle between the first part 8 and the first side 5 is an acute angle or an obtuse angle, and the angle between the first part 8 and the second part 9 is an obtuse angle. Such a setting makes the first parts 8 of the positive and negative tabs 3 gradually stagger from bottom to top, and the second parts 9 are completely staggered. In this way, the second parts 9 (free ends) of the positive and negative tabs 3 can be prevented from coming into contact with each other.

[0030] The above has introduced the present application in detail. Specific examples are used in this article to elaborate on the principle and implementation manner of the present application. The description of the above embodiments is only used to help understand the present application and its core idea. It should be pointed out that for those of ordinary skill in the art of this technology, without departing from the principle of the present application, several improvements and modifications can still be made to the present application, and these improvements and modifications also fall within the protection scope of the claims of the present application.

Claims

1. A lead-acid battery grid, characterized in that: The invention comprises a frame, one side of the frame is provided with a pole ear (3), and the other side of the frame is an arc-shaped structure; the frame is provided with vertical ribs (1) and a plurality of arc-shaped ribs (2), the vertical ribs (1) extend from the pole ear (3) to the arc-shaped structure, the arc-shaped ribs (2) are arranged transversely in the frame, and the bending direction of the arc-shaped structure is consistent with the bending direction of the arc-shaped ribs (2).

2. The lead-acid battery grid according to claim 1, characterized in that: The distance between two adjacent arc-shaped ribs (2) decreases in sequence from the pole ear (3) end to the arc-shaped structure end.

3. The lead-acid battery grid according to claim 2, characterized in that: The curvature of the arc-shaped rib (2) decreases from the end of the pole ear (3) to the end of the arc-shaped structure.

4. The lead-acid battery grid according to claim 3, characterized in that: The frame comprises a first side (5), a second side (6) and two third side (7) arranged in parallel, the first side (5) connecting the first ends of the two third side (7), the second side (6) connecting the second ends of the two third side (7), the arc structure is arranged on the second side (6), and the pole ear (3) is arranged on the first side (5).

5. The lead-acid battery grid according to claim 4, characterized in that: The vertical rib (1) is arranged between the two third side edges (7) and is parallel to the third side edges (7).

6. The lead-acid battery grid according to claim 4, characterized in that: The midpoint of the first side (5) is the first midpoint, the midpoint of the second side (6) is the second midpoint, and the vertical rib (1) is arranged on the connecting line of the first midpoint and the second midpoint.

7. The lead-acid battery grid according to claim 6, characterized in that: The connection point between the pole ear (3) and the first side edge (5) is located on the connection line between the first midpoint and the second midpoint.

8. The lead-acid battery grid according to claim 7, characterized in that: The ratio of the width of the vertical rib (1) to the width of the third side edge (7) is 1.5:1 to 2:

1.

9. The lead-acid battery grid according to claim 8, characterized in that: The ratio of the width of the vertical rib (1) to the width of the third side edge (7) is 2:

1.

10. The lead-acid battery grid according to claim 1, characterized in that: The pole lug (3) comprises a first part (8) and a second part (9), the first end of the first part (8) is connected to the first side edge (5), the second end of the first part (8) is connected to the second part (9), and the angle between the first part (8) and the first side edge (5) is an acute angle or an obtuse angle.

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