A bipolar lead-acid battery

Abstract

The invention discloses a bipolar lead-acid storage battery, which comprises a positive terminal electrode, a negative terminal electrode and a bipolar plate arranged between the positive terminal electrode and the negative terminal electrode; the positive terminal electrode Equipped with a positive polarity plate, a negative polarity terminal electrode is equipped with a negative polarity plate; a bipolar pole plate is equipped with a negative polarity electrode on the opposite side of the positive polarity terminal electrode, and a positive polarity electrode is installed on the opposite side of the negative polarity terminal electrode; Between the positive terminal electrode and the negative electrode of the bipolar plate, between the positive electrode of the bipolar plate and the negative terminal electrode, fiber separators for absorbing electrolyte are respectively provided , an air chamber is provided on the top of each fiber separator, a safety valve is provided on the top of each air chamber, and a cover is provided at the upper end of the safety valve. Independent setting, each air chamber is equipped with a safety valve, the pressure generated by the expansion and contraction of any compartment will not affect other compartments.

Description

technical field [0001] The invention relates to the field of bipolar lead-acid batteries, in particular to a bipolar lead-acid battery. Background technique [0002] In recent years, carbon dioxide emissions have been reduced in order to protect the environment. The development and utilization of new energy is quite hot, especially in the automotive industry. High-performance secondary batteries are the current technical bottleneck. After several years of practice, it has been proved that lithium-ion batteries cannot be used due to their structural and material problems. The charging and discharging of high current makes safety impossible to be guaranteed. Judging from the current situation, bipolar lead-acid battery is the best battery of choice in the automotive industry. bipolar lead-acid battery, such as Chinese patent ZL200920112517.4 discloses a bipolar lead-acid battery, including a positive terminal piece and a negative terminal piece drawn from the casing and a sea...

AI Technical Summary

Problems solved by technology

The development and utilization of new energy is quite hot, especially in the automotive industry. High-performance secondary batteries are the current technical bottleneck. After several years of practice, it has been proved that lithium-ion batteries cannot be used due to their structural and material problems. The charging and discharging of high current makes safety impossible to be guaranteed. Judging from the current situation, bipolar lead-acid battery is the best battery of choice in the automotive industry. bipolar lead-acid battery, such as Chinese patent ZL200920112517.4 discloses a bipolar lead-acid battery, including a positive terminal piece and a negative terminal piece drawn from the casing and a sealed battery cover with a one-way valve, The bipolar plate adopts carbon fiber substrate, and the bipolar plate divides the inner cavity of the shell into multiple compartments. There is only one sealed battery cover for the one-way valve, and the internal air chambers are connected. This bipolar lead-acid battery The design does not discuss whether it can be industrially mass-produced for the time being. Its obvious defects are: 1. The electrodes are drawn out through the positive terminal piece and the negative terminal piece. When the current is flowing, the welding point is most likely to overheat, causing the welding wire of the welding point to melt; 2. Although the material of the electrode is not disclosed, because the electrode needs to be coated with lead paste, according to the existing design ideas, the application material of the electrode must use lead alloy , because the lead alloy has a certain rigidity, is not easy to deform, and is easy to apply lead paste; 3. This design uses a one-way valve for the air chambers, and the air pressure in each compartment is averaged, but the expansion coefficients of different compartments are different. , so it is easy for one of the compartments to exceed the limit, but the one-way valve has not been opened; in addition, according to the actual production process, according to the design structure, it is easy to produce a short circuit when adding acid during the production process, and its product rate is high

Patent Publication No. CN103151566 discloses a bipolar high-power lead-acid battery. In order to solve the problem of adding acid, the design is provided with an inverted tapered groove on any frame of the bipolar type facing the other, located between two inverted The plastic partition between the tapered grooves is hollowed out and two inverted tapered grooves cooperate to form an inverted tapered hole for installing a safety valve. The two adjacent safety valves are misplaced. Although this design is to some extent It solves the problem of adding acid, but because the purpose of its design is only to solve the problem of adding acid, the bipolar lead-acid battery designed by this patent does not have an air chamber, and the setting of the safety valve is to prevent the internal liquid from leaking out, so The setting of the safety valve is relatively firm, from the patent figure 1 and 2 It can be seen that, especially from figure 2 It can be seen from the cross-sectional diagram of the second, fourth and sixth porous partitions that plastic partitions are installed on the top of the porous partition, it can be inferred that the purpose of setting the inverted tapered groove is to solve the problem of acid addition, because it is for The effect of adding acid determines that the size of the tapered groove will not be too large. Although the above-mentioned defects are reflected in the structure disclosed in this patent, in fact, the existing bipolar lead-acid batteries more or less have the above-mentioned one or several flaws

Images