Lead-acid battery curved panel grid

Abstract

The invention discloses a curved plate grid of a lead-acid storage battery. The curved plate grid comprises a frame, a plurality of ribs arranged inside the frame and a lug arranged on the frame, wherein the frame comprises longitudinal frames and transverse frames, and the ribs comprise longitudinal ribs and transverse ribs; the longitudinal ribs and the transverse ribs are interwoven into a rib net; the longitudinal frames and the longitudinal ribs or transverse ribs are of a continuous curve shape with obvious crests and troughs; the transverse ribs are of a straight line, and are positioned between the adjacent crests and troughs of the longitudinal ribs; an included angle is formed between the upper surfaces or lower surfaces of the transverse ribs and a plane of the grid. Compared with an existing grid, the curved plate grid has the advantage that the coating thickness of an active material is greatly increased on the basis that the existing grid and the curved plate grid are equal in weight, so that the full-filling quantity of the active material is increased, and the specific energy of the lead-acid storage battery is increased; the bonding strength between the active material and the grid can be greatly enhanced, the active material is favorably prevented from falling off, and thus the service life of the lead-acid storage battery is prolonged.

Description

technical field [0001] The invention belongs to the technical field of lead-acid batteries, and relates to a lead-acid battery grid. Background technique [0002] With the rapid development of the domestic new energy industry, the high-performance power and energy storage lead-acid batteries necessary for new electric vehicles, wind energy and solar energy have become the key to their development. High-performance power and energy storage lead-acid batteries should have performance characteristics such as high specific energy, long service life, small size and low cost, and these performance characteristics depend on the weight ratio of the active material in the battery plate to its carrier (grid) and bond strength. In the lead-acid battery, the active material is the main body of the electrochemical reaction, and the grid is the carrier of the active material and also the conductor of the current. The grid does not participate in the electrochemical reaction, and the batt...

AI Technical Summary

Problems solved by technology

Since the coating thickness of the active material can only exceed 0.1-0.2 mm on both sides of the grid, otherwise the active material will easily fall off, so the filling amount of the active material in the planar grid is small; the active material carried by the planar grid is The ribs and the frame are divided into several approximately independent units. Due to the drying shrinkage of the active material and the bending and vibration of the plate during use, the bonding strength between the active material and the grid is low, which will easily cause the active material to fall off and affect the battery. service life

If you want to increase the amount of active material, you need to increase the thickness of the grid. The increase in the thickness of the grid will increase the weight of the grid, so the specific energy of the battery does not increase. This method of increasing the active material cannot meet high performance. How to increase the filling ratio of the plate active material and the bonding strength between the active material and the grid has become a problem that must be solved for high-performance power and energy storage lead-acid batteries.

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