CN215184071U

CN215184071U - Storage battery grid

Info

Publication number: CN215184071U
Application number: CN202120394059.9U
Authority: CN
Inventors: 李越南; 周文渭; 胡芳; 欧阳万忠; 方明学; 陈勤忠; 汤序锋; 庄建; 房兆锟; 丁全俊
Original assignee: Tianneng Battery Group Co Ltd
Current assignee: Tianneng Battery Group Co Ltd
Priority date: 2021-02-22
Filing date: 2021-02-22
Publication date: 2021-12-14
Anticipated expiration: 2031-02-22

Abstract

The utility model discloses a storage battery grid, including last frame rib, lower frame rib and set up crisscross distribution, the horizontal rib that forms network structure and the perpendicular rib between last frame rib and lower frame rib, every erect the rib by being located between the adjacent horizontal rib to and the perpendicular rib monomer between horizontal rib and the upper and lower frame rib is constituteed, erect the rib monomer and be to the convex bow-shaped structure in storage battery grid one side. The whole grid has higher deformation resistance and creep resistance, the upper current and the lower current of the polar plate can be uniformly distributed, the heat generated by quick charge and discharge can be uniformly distributed, and the utilization rate of active substances at the lower part of the polar plate is improved.

Description

Storage battery grid

Technical Field

The utility model relates to a battery technical field, concretely relates to battery grid.

Background

The grid has the following functions in the lead-acid storage battery: the first is used as a support body of the active substance, the adhesion of the active substance is kept, and the electrode plate is kept to have a certain shape; the second is to conduct and collect the current, so that the current is distributed on each part of the active material as uniformly as possible to form a relatively uniform electric conductor. The principle of grid design is to ensure that the positive and negative grids have a proper proportion with the active substance after being pasted, so that the active substance of the positive electrode is always excessive in the process of electrochemical reaction, and the damage to the whole structure caused by excessive change of the volume of the active substance is reduced.

At present, in order to improve the specific energy of the battery, most of the commonly adopted grids are bent and deformed, so that the grids with the same weight bear more active substances, and the purpose of improving the specific energy of the battery is achieved. However, the grid makes the active material and the plane formed by the rib joint surface and the frame form a certain angle, different parts are subjected to different pressures during pasting, pasting is not facilitated, the phenomenon of non-uniformity of larger parts can be caused, operation is difficult in actual production, production efficiency is low, and internal resistance of the battery is larger. On the other hand, in the formation process, the positive plate active material reacts with sulfuric acid to generate PbSO4 on the particle surface, and then PbO2 is formed in the formation process, and the active material undergoes a large volume change in the process to cause deformation of the positive plate. The uneven thickness of the lead plaster on the upper surface and the lower surface of the pole plate is in direct proportion to the degree of the arch deformation, namely the more uneven the thickness of the lead plaster on the two surfaces of the green pole plate is, the more serious the arch deformation is.

The patent specification with the publication number of CN209312907U discloses a lead-acid storage battery, including positive plate grid and negative plate grid, at least one of positive plate grid and negative plate grid includes the frame, sets up the utmost point ear and the rib that sets up in the frame of the upper end of frame, wherein the rib includes the level setting many horizontal ribs in the frame and sets up in the frame and with many crisscross slope ribs that form network structure of horizontal ribs, just the one end of many slope ribs with utmost point ear is connected, the other end of many slope ribs is radial distribution. The grid improves the conductivity of the grid through the radial distributed inclined ribs, but has the problem of poor deformation resistance and creep resistance.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a storage battery grid, the whole higher resistance to deformation creep resistance that has of grid to the more even distribution of electric current is favorable to the heat evenly distributed that quick charge-discharge produced about enabling the polar plate, improves polar plate lower part active material's utilization ratio.

The utility model provides a storage battery grid, includes frame rib, lower frame rib and sets up crisscross distribution, the horizontal rib that forms network structure and perpendicular rib between frame rib and the lower frame rib, every erect the rib by being located between the adjacent horizontal rib to and the perpendicular rib monomer of horizontal rib and upper and lower frame rib between form, it is convex bow-shaped structure to storage battery grid one side to erect the rib monomer.

In the scheme, the vertical ribs are formed by the vertical rib monomers with the arch structures, so that the contact area of the whole grid and an active substance is increased, the utilization rate of the active substance is improved, the reaction area of a polar plate is increased, the current density of a direct contact unit area is increased, the specific energy of the battery is improved, the internal resistance of the battery can be reduced by using the thin ribs, and the high-current discharge performance is improved; in addition, the strength of the grid is improved, and the deformation of the grid caused by the force of the pressure of the coating plate is avoided.

Preferably, the vertical ribs are of a single rib structure, and adjacent vertical rib monomers in each vertical rib respectively protrude towards two sides of the storage battery grid. The design further increases the contact area of the whole grid and the active substance, and improves the utilization rate of the active substance.

Preferably, the vertical ribs are of a double-rib structure, two vertical rib monomers are arranged in each vertical rib between adjacent transverse ribs or between each transverse rib and the upper and lower frame ribs, and the two vertical rib monomers respectively protrude towards two sides of the storage battery grid.

A square hole structure is formed between the two vertical rib monomers, so that the falling direction of the active substances from the plate grid is limited, relative acting force is generated between the active substances, and the active substances are difficult to fall; meanwhile, the coating amount of the active material is increased, the contact area between the grid formed by crossing the active material and the grid is greatly increased, and the polar plate is not deformed during transportation and turnover. The symmetrical double-rib structural design improves the utilization rate of active substances and simultaneously improves the specific energy of the battery.

Further preferably, the thickness of each single vertical rib along the width direction of the accumulator plate grid is 0.8-1.0 mm. The thickness of the rib is about 1/2 of the thickness of the rib of the prior common plate grid, so that the internal resistance of the battery is reduced, and the high-current discharge performance is improved; the strength and the conductivity of the grid are increased, and the specific energy of the battery is improved.

Preferably, the distance between adjacent lateral ribs gradually increases from the upper-side frame rib side to the lower-side frame rib side.

Further preferably, the distance between adjacent transverse ribs increases in an arithmetic progression from the upper frame rib side to the lower frame rib side.

In the process of charging and discharging the battery, because of the reason of the current transmission distance and the reason of the conductive area, the utilization rate of the active substance on the upper part of the polar plate is higher than that of the lower part of the polar plate, the central part on the upper part of the positive plate of the battery is seriously transformed due to uneven utilization, the polar plate is integrally divided into gradually increasing intervals by adopting a vertical rib strip, the whole conductive area of the plate grid is uniformly divided, and the current distribution is uniform. The distances between the transverse ribs are in an arithmetic progression and gradually increase to form a grid structure with a dense upper part and a sparse lower part, which is beneficial to the dispersion of current, the conductive area is gradually increased, and the phenomena of high and low utilization ratio of active substances are balanced.

Preferably, the transverse ribs have a sheet structure, so that the contact area and the bearing capacity with the active material are increased.

The utility model has the advantages that:

under the same weight, a thinner vertical rib structure is adopted, so that the contact area of the whole grid and an active substance is increased, the utilization rate of the active substance is improved, the reaction area of a polar plate is increased, the current density of a direct contact unit area is increased, the internal resistance of a battery is reduced by using the thinner vertical rib, and the high-current discharge performance is improved; the strength and the conductivity of the grid are increased, and the specific energy of the battery is improved. The vertical double-rib ribs form a square hole structure, can bear acting forces in different directions, can contain more active substances adhered while preventing the active substances from falling off, prevents the deformation of a grid due to the acting force of the pressure of a coating plate, improves the utilization rate of the active substances of the battery and the service life of a polar plate, and prolongs the service life of the battery while improving the capacity of the battery.

Drawings

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

FIG. 2 is a schematic view showing the structure of a grid in example 2;

fig. 3 is a front view of a grid in embodiment 1;

fig. 4 is a side view of a grid of example 1.

Detailed Description

Example 1

As shown in fig. 1, a storage battery grid, including last frame rib 1, lower frame rib 2 and setting crisscross distribution between last frame rib 1 and lower frame rib 2, form network structure's horizontal rib 3 and perpendicular rib 4, every perpendicular rib 4 is by being located between the adjacent horizontal rib 3 to and horizontal rib 3 and last, lower frame rib 1, the perpendicular rib monomer between 2 constitutes, it is to the convex bow-shaped structure in storage battery grid one side to erect the rib monomer.

In this embodiment, vertical rib 3 is single muscle structure, and every vertical rib 3 is adjacent vertical rib monomer respectively to the both sides protrusion of battery grid, and this design has further increased the whole area of contact with active material of grid, has improved active material utilization ratio. The thickness of each vertical rib monomer 3 along the width direction of the accumulator grid is 0.8-1.0mm, which is about 1/2 of the thickness of the current universal grid rib, the use of thinner vertical ribs reduces the internal resistance of the battery, and improves the high-current discharge performance.

In this embodiment, as shown in fig. 1, 3 and 4, the transverse ribs 3 are of a sheet structure and are horizontally arranged, and the distance between adjacent transverse ribs 3 increases in an arithmetic progression from the upper frame rib 1 side to the lower frame rib 2 side, for example, the distance is: 20mm, 22mm, 24mm, 26mm, 28mm, 30mm, 32mm, 34mm, 36mm, 38 mm; the spacing between the transverse ribs 3 is in an arithmetic progression and gradually increases to form a grid structure with a dense upper part and a sparse lower part, which is beneficial to the dispersion of current, the conductive area is gradually increased, and the phenomena of high and low utilization ratio of active substances are balanced.

Example 2

As shown in fig. 2, the present embodiment is different from embodiment 1 only in that: the vertical ribs 4 are of a double-rib structure, namely, two vertical rib monomers are arranged between every two adjacent transverse ribs 3 or between the transverse ribs 3 and the upper and lower frame ribs 1 and 2, the two vertical rib monomers protrude towards the two sides of the storage battery grid respectively, a square hole structure is formed between the two opposite vertical rib monomers, the square hole structure enables the active substances to be limited in the falling direction of the grid, relative acting force is generated between the active substances, and the active substances are difficult to fall off.

Claims

1. The utility model provides a storage battery grid, includes frame rib, lower frame rib and sets up crisscross distribution, the horizontal rib that forms network structure and perpendicular rib between frame rib and lower frame rib, its characterized in that: each vertical rib is composed of vertical rib monomers which are positioned between adjacent transverse ribs and between the transverse ribs and the upper and lower frame ribs, and each vertical rib monomer is of an arched structure protruding towards one side of the storage battery grid.

2. The battery grid of claim 1, wherein: the vertical ribs are of a single rib structure, and adjacent vertical rib monomers in each vertical rib respectively protrude towards two sides of the storage battery grid.

3. The battery grid of claim 1, wherein: the vertical ribs are of a double-rib structure, two vertical rib monomers are arranged between every two adjacent transverse ribs or between each transverse rib and the upper and lower frame ribs in each vertical rib, and the two vertical rib monomers respectively protrude towards two sides of the storage battery grid.

4. The battery grid of claim 2 or 3, wherein: the thickness of each vertical rib single body along the width direction of the accumulator plate grid is 0.8-1.0 mm.

5. The battery grid of claim 1, wherein: the distance between adjacent horizontal ribs is gradually increased from the upper frame rib side to the lower frame rib side.

6. The battery grid of claim 5, wherein: the distance between adjacent horizontal ribs is increased in an arithmetic progression from the upper frame rib side to the lower frame rib side.

7. The battery grid of claim 1, wherein: the transverse ribs are of a sheet structure.