Storage battery provided with bipolar polar plate

Abstract

The invention discloses a storage battery provided with a bipolar polar plate, which comprises a polar plate base body and an active material loaded on the base body. The front surface and the back surface of the base body are respectively provided with crossed slant U-shaped grooves; the opening of the slant U-shaped groove on the front surface is slant upwards, and the groove is filled with a positive active material; the opening of the slant U-shaped groove on the back surface is slant downwards, and the groove is filled with a negative active material. Due to the pocket-shaped structure design, the positive active material is not easy to fall off in the charge-discharge process even in expansion so as to guarantee the stability of the polar plate charge-discharge performance. The base body is manufactured by casting alloy materials of lead-calcium-tin-aluminum, rare earth, and the like. Compared with the base body manufactured by the traditional titanium alloy casting technology, the production cost can be effectively reduced, the process operation difficulty can be reduced and the probability of generating air hole can be reduced, so that the product quality can be guaranteed.

Description

technical field [0001] The invention relates to a storage battery, in particular to a storage battery provided with bipolar pole plates. Background technique [0002] Bipolarity is relative to unipolarity. In a traditional lead-acid battery, one plate corresponds to one polarity, positive or negative, while bipolarity means that one plate has two polarities, that is, on one substrate The front and back sides of the panels are coated with positive and negative active materials, respectively. The obvious advantage of bipolar is that it reduces the number of plates and the weight of the busbar. For example, the minimum voltage of a unipolar lead-acid battery is 2V, and the bipolar monomer consists of a bipolar matrix plus two The unipolar board makes up the 4V. A comparison shows that if a 6V battery is used, three monomers and six plates are required for unipolarity, and two unipolar plates on both sides of bipolarity are required for a total of four plates. In addition, bi...

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Problems solved by technology

[0003] In order to overcome the defects of the prior art, the present invention provides a storage battery equipped with bipolar pole plates to solve the problems in the prior art that the positive active material of the pole plate matrix expands and easily falls off during the charging and discharging process, the cost is high, and the operation is difficult , There are pores and trachoma, which lead to poor corrosion resistance and other problems

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