Contra-positioned bipolar battery

Abstract

The invention relates to the technical field of batteries, in particular to an opposite bipolar plate and an opposite bipolar battery. The opposite bipolar plate is mainly characterized in that one end of a conductive substrate is provided with an anode plate, and the other end thereof is provided with a cathode plate. The opposite bipolar battery is mainly characterized in that the two ends thereof are respectively provided with a unipolar anode plate group and a unipolar cathode plate group; the opposite bipolar plate groups with the bipolarity are stacked in sequence between the unipolar anode plate group and the unipolar cathode plate group; the adjacent single batteries are internally connected in series as the opposite bipolar plate penetrates the separator; no single battery requires external connecting component; the structure is simple; the current density, working conditions and environmental conditions of heat and moisture for the polar plates are uniform; the internal resistance and the connection requirements are greatly reduced; the weight is greatly reduced; the reliability and security are substantially improved; the service life is long; and the cost is greatly reduced. The invention can greatly improve the power density and energy density of the battery, and simultaneously improves the high-current battery charge and discharge capacity, the charge-discharge efficiency, the adaptability to the thermal environment, the anti-vibration capability and the like.

Description

technical field [0001] The invention relates to a bipolar battery in the field of battery technology, in particular to an opposed bipolar battery. Background technique [0002] The voltage of commonly used battery cells is generally low. For example, the voltage of a lithium-ion cell is 3.6V, the voltage of a lead-acid cell is 2.0V, and the voltage of a nickel-metal hydride cell and a nickel-cadmium cell is 1.2V. In order to meet the power and energy requirements of the battery system in actual use, multiple single batteries need to be used in series in groups. [0003] Each single battery has a separate sealed shell. In addition to the positive and negative plates, diaphragm, and electrolyte, the square single battery has separate positive and negative tabs, positive and negative current collectors, and positive and negative anti-rotation devices. , the proportion of inert substances is large, the positive and negative plates must be welded with the tabs, and the tabs must...

AI Technical Summary

Problems solved by technology

Its disadvantages are: it is a "sandwich" structure, and the sealing between each single battery is difficult; one side of the bipolar plate is the positive electrode, and the other side is the negative electrode, and each single battery can only be composed of one positive electrode and one negative electrode. , which is not convenient for application in large-capacity single batteries; only one side of the positive and negative plates on both sides of the bipolar plate undergoes a complete electrochemical reaction, and the active material on the other side is not fully utilized, and the electrochemical reaction is insufficient, resulting in The capacity of the electrodes is low; except for the positive and negative unipolar electrodes at both ends of the module, the middle is a bipolar electrode, and the positive and negative electrodes in the middle need to add a conductive metal substrate, compared with the conventional unipolar , the power density and energy density of the bipolar plate are reduced

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