CN112349912B

CN112349912B - Storage battery grid, polar plate and storage battery

Info

Publication number: CN112349912B
Application number: CN202011227127.9A
Authority: CN
Inventors: 易卜拉欣.萨阿题.默罕默德
Original assignee: Meibang Technology Rugao Co ltd
Current assignee: MEIBANG Technology (Rugao) Co.,Ltd.
Priority date: 2020-11-06
Filing date: 2020-11-06
Publication date: 2021-11-30
Anticipated expiration: 2040-11-06
Also published as: CN112349912A

Abstract

The invention discloses a storage battery grid, a polar plate and a storage battery, which comprise a plurality of first annular frames coaxially sleeved from inside to outside, wherein a plurality of second annular frames are uniformly distributed between every two adjacent first annular frames along a virtual circumferential direction; the outer ring of each second annular frame is connected with the inner ring of one first annular frame and the outer ring of the first annular frame respectively; and a tab is fixed on the outer ring of the first annular frame positioned at the outermost side. The grid can improve the uniformity utilization of active substances on the surface of the polar plate, is beneficial to improving the discharging/charging efficiency, and the polar plate increases the electrode area of the polar plate and improves the performance of the storage battery by using a plurality of curved surface structures.

Description

Storage battery grid, polar plate and storage battery

Technical Field

The invention belongs to the technical field of storage batteries, and particularly relates to a storage battery grid, a polar plate and a storage battery.

Background

The main components constituting the battery include a positive plate, a negative plate, and an AGM separator sandwiched between the positive plate and the negative plate, both of which are composed of a plate grid and an active material fixed to the plate grid. The electrode area, which is the active surface area of the electrode per unit volume of the electrochemical reactor and is referred to as the electrode area, is a major factor affecting the performance of a battery. Since the electrochemical reaction is heterogeneous, the size and state of the electrode area are greatly affected. If the specific electrode area of the reactor is larger, at a certain current density, obviously the reactor can pass larger current; on the contrary, if the area of the fixed total current electrode is larger, the real current density is smaller, which is beneficial to reducing polarization and tank voltage.

Disclosure of Invention

The technical problem to be solved by the present invention is to provide a grid, a polar plate and a storage battery for a storage battery, wherein the grid can improve the uniformity of active materials on the surface of the polar plate, which is beneficial to improving the discharging/charging efficiency, and the polar plate increases the electrode area of the polar plate and improves the performance of the storage battery by using a plurality of curved surface structures.

The invention discloses a storage battery grid in a first aspect, which comprises a plurality of first annular frames coaxially sleeved from inside to outside, wherein a plurality of second annular frames are uniformly distributed between every two adjacent first annular frames along a virtual circumferential direction; the outer ring of each second annular frame is connected with the inner ring of one first annular frame and the outer ring of the first annular frame respectively; and a tab is fixed on the outer ring of the first annular frame positioned at the outermost side.

Further, a plurality of second ring frames located on the same virtual circle are sequentially connected to each other.

The invention discloses a storage battery polar plate in a second aspect, which comprises the storage battery grid and an active material arranged on the grid; the front side surface of the active material filled in the first annular frame positioned at the innermost side is a convex curved surface, and the rear side surface is a concave curved surface; if the front side surface of the active material filled in the second annular frame is a convex curved surface, the back side surface is a concave curved surface, or the front side surface is a concave curved surface, and the back side surface is a convex curved surface; in two adjacent second annular frames, the front side surface of the active material in one second annular frame is a concave curved surface, and the front side surface of the active material in the other second annular frame is a convex curved surface.

Furthermore, the convex curved surface or the concave curved surface forms a virtual geometric body with a lacking bottom surface.

The invention discloses a storage battery polar plate in a third aspect, which comprises the storage battery grid and an active material arranged on the grid; the two side surfaces of the active material filled in the first annular frame positioned at the innermost side and the active material filled in all the second annular frames are both convex curved surfaces or concave curved surfaces.

In a fourth aspect of the invention, a battery comprises a plurality of battery cells, each battery cell comprising a positive plate, a negative plate, and an AGM separator sandwiched between the positive plate and the negative plate, the positive plate and the negative plate being each a battery plate as described above, the front side of the positive plate facing the back side of the negative plate.

A fifth aspect of the present invention is a storage battery including a plurality of storage cells, each storage cell including a positive electrode plate, a negative electrode plate, and an AGM separator sandwiched between the positive electrode plate and the negative electrode plate, the positive electrode plate and the negative electrode plate each including a grid and a plurality of active materials filled in the grid, and both side surfaces of each active material being convex curved surfaces or concave curved surfaces.

A storage battery according to a sixth aspect of the present invention includes a plurality of storage cells, each storage cell including a positive electrode plate, a negative electrode plate, and an AGM separator interposed between the positive electrode plate and the negative electrode plate, each of the positive electrode plate and the negative electrode plate including a grid and a plurality of active materials filled in the grid, and each of the active materials has two sides, one of which is a convex curved surface and the other of which is a concave curved surface.

Compared with the prior art, the invention has the following advantages:

1. the grid has better deformation resistance and better utilization of the uniformity of active substances on the surface of the grid by using a structure of overlapping a plurality of rings, and is beneficial to improving the discharging/charging efficiency.

2. The polar plate of the invention increases the electrode area of the polar plate by using a plurality of curved surface structures, improves the performance of the storage battery, and can discharge more quickly and stably particularly during discharging.

The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.

Drawings

Fig. 1 is a schematic diagram of the structure of a grid of the present invention.

Fig. 2 is a schematic structural diagram of a plate in embodiment 2 of the present invention.

Fig. 3 is a schematic structural diagram of a convex curved plate in embodiment 3 of the present invention. .

Fig. 4 is a schematic structural diagram of a concave curved plate in embodiment 3 of the present invention.

Fig. 5 is a schematic structural diagram of a pole plate with a conical convex curved surface.

Fig. 6 is a schematic structural diagram of a polar plate with a spherical convex curved surface.

Fig. 7 is a schematic structural diagram of a polar plate with a multi-edge curved surface as a convex curved surface.

FIG. 8 is a schematic structural view of example 4.

FIG. 9 is a schematic structural view of example 5.

FIG. 10 is another schematic structural view of embodiment 5.

Description of reference numerals:

1 — a first ring frame; 2-a second ring frame; and 3, a tab.

Detailed Description

Example 1

As shown in fig. 1, a storage battery grid comprises a plurality of first annular frames 1 coaxially sleeved from inside to outside, and a plurality of second annular frames 2 are uniformly distributed between two adjacent first annular frames 1 along a virtual circumferential direction; the outer ring of each second annular frame 2 is connected with the inner ring of one first annular frame 1 and the outer ring of the first annular frame 1 respectively; and a tab 3 is fixed on the outer ring of the first annular frame 1 positioned at the outermost side.

A plurality of second ring frames 2 located on the same virtual circle are sequentially connected to each other.

Example 2

As shown in fig. 2, a battery plate comprising a battery grid as in example 1, and an active material disposed on the grid; the front side surface of the active material filled in the first annular frame 1 positioned at the innermost side is a convex curved surface, and the back side surface is a concave curved surface; if the front side surface of the active material filled in the second annular frame 2 is a convex curved surface, the back side surface is a concave curved surface, or the front side surface is a concave curved surface, and the back side surface is a convex curved surface; in two adjacent second annular frames 2, the front side surface of the active material in one second annular frame 2 is a concave curved surface, and the front side surface of the active material in the other second annular frame 2 is a convex curved surface.

As shown in fig. 5-7, the convex curved surface or the concave curved surface forms a virtual geometry of the bottom lacking surface. In this embodiment, the convex curved surface or the concave curved surface forms a virtual hemisphere with a missing bottom surface.

Example 3

As shown in fig. 3 and 4, a battery plate includes a battery grid as in example 1, and an active material disposed on the grid; both side surfaces of the active material filled in the innermost first ring frame 1 and the active material filled in all the second ring frames 2 are convex curved surfaces or concave curved surfaces.

As shown in fig. 5-7, the convex curved surface or the concave curved surface forms a virtual geometry with a missing bottom surface, such as a hemispherical surface, a conical surface, a pyramidal surface, a star-shaped surface, a micro-sphere, a nano-sphere, and the like. In this embodiment, the convex curved surface or the concave curved surface forms a virtual hemisphere with a missing bottom surface.

Example 4

As shown in fig. 8, a storage battery includes a plurality of storage cells each including a positive electrode plate, a negative electrode plate, and an AGM separator sandwiched between the positive electrode plate and the negative electrode plate, both of which are the storage battery plates according to

embodiment

2 or 3, with a front side of the positive electrode plate facing a rear side of the negative electrode plate.

Example 5

As shown in fig. 9 and 10, a storage battery includes a plurality of storage cells each including a positive electrode plate, a negative electrode plate, and an AGM separator sandwiched between the positive electrode plate and the negative electrode plate, the positive electrode plate and the negative electrode plate each including a grid and a plurality of active materials filled in the grid, and both side surfaces of each active material being convex curved surfaces or concave curved surfaces.

Example 6

A storage battery comprises a plurality of storage cells, each storage cell comprises a positive plate, a negative plate and an AGM separator clamped between the positive plate and the negative plate, the positive plate and the negative plate respectively comprise a grid and a plurality of active materials filled on the grid, one of two sides of each active material is a convex curved surface, and the other of the two sides of each active material is a concave curved surface.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and all simple modifications, changes and equivalent structural changes made to the above embodiment according to the technical spirit of the present invention still fall within the protection scope of the technical solution of the present invention.

Claims

1. A battery plate, characterized by: comprises a grid and an active material arranged on the grid; the grid comprises a plurality of first annular frames which are coaxially sleeved from inside to outside, and a plurality of second annular frames are uniformly distributed between every two adjacent first annular frames along a virtual circumferential direction; the outer ring of each second annular frame is connected with the inner ring of one first annular frame and the outer ring of the first annular frame respectively; a tab is fixed on the outer ring of the first annular frame positioned at the outermost side;

the front side surface of the active material filled in the first annular frame positioned at the innermost side is a convex curved surface, and the rear side surface is a concave curved surface; if the front side surface of the active material filled in the second annular frame is a convex curved surface, the back side surface is a concave curved surface, or the front side surface is a concave curved surface, and the back side surface is a convex curved surface; in two adjacent second annular frames, the front side surface of the active material in one second annular frame is a concave curved surface, and the front side surface of the active material in the other second annular frame is a convex curved surface.

2. A battery plate according to claim 1, wherein: the plurality of second ring frames located on the same virtual circle are sequentially connected with each other.

3. A battery plate according to claim 1, wherein: the convex curved surface or the concave curved surface forms a virtual geometric body with a lacking bottom surface.

4. A battery plate, characterized by: comprises a grid and an active material arranged on the grid; the grid comprises a plurality of first annular frames which are coaxially sleeved from inside to outside, and a plurality of second annular frames are uniformly distributed between every two adjacent first annular frames along a virtual circumferential direction; the outer ring of each second annular frame is connected with the inner ring of one first annular frame and the outer ring of the first annular frame respectively; a tab is fixed on the outer ring of the first annular frame positioned at the outermost side;

the two side surfaces of the active material filled in the first annular frame positioned at the innermost side and the active material filled in all the second annular frames are both convex curved surfaces or concave curved surfaces.

5. A battery plate according to claim 4, wherein: the convex curved surface or the concave curved surface forms a virtual geometric body with a lacking bottom surface.

6. A storage battery comprising a plurality of storage cells, each storage cell comprising a positive plate, a negative plate, and an AGM separator sandwiched between the positive plate and the negative plate, characterized in that: the positive and negative plates are battery plates as claimed in any one of claims 1 to 5, the front side of the positive plate facing the rear side of the negative plate.