Bipolar Batteries and Bipolar Energy Storage Devices

Abstract

The invention discloses a bipolar battery and a bipolar energy storage apparatus. By the composite bipolar plates with a recessed gap structure and insulation isolation frames with a recessed gap structure, liquid or colloid electrolyte can be conveniently injected into the bipolar battery through an injection port in the process of forming the bipolar battery by the composite bipolar plates; and then the bipolar energy storage apparatus is formed by sealing; the bipolar energy storage apparatus can be designed as a battery pack or a super capacitor assembly, and the combination in series or in parallel can save a great amount of external connection leads, reduce energy consumption and needs no complex monitoring and management system; and the cost can be greatly reduced. The manufacture method of the invention is mature and reliable, which can omit the procedure of pole ear welding and has advantages of small work current density, small caloric power; good uniform consistency, high reliability, and long service life etc.

Description

technical field [0001] The invention relates to the field of battery manufacturing, in particular to a bipolar battery and a bipolar energy storage device. Background technique [0002] Lithium-ion batteries have the advantages of high operating voltage, high specific energy, small self-discharge, wide operating temperature range, and low environmental pollution. They have been widely used in communications, portable appliances, etc., and are generally considered to be electric One of the ideal power sources for vehicle power. However, the power lithium-ion battery with the traditional structure also has its disadvantages: it cannot be charged and discharged with high power, otherwise it will easily cause thermal runaway and cause safety problems such as combustion or explosion, and the larger the capacity of a single battery, the higher the safety risk , therefore, the power lithium-ion battery capacity and power of the traditional structure should not be designed too larg...

AI Technical Summary

Problems solved by technology

However, the power lithium-ion battery with the traditional structure also has its disadvantages: it cannot be charged and discharged with high power, otherwise it will easily cause thermal runaway and cause safety problems such as combustion or explosion, and the larger the capacity of a single battery, the higher the safety risk , therefore, the power lithium-ion battery capacity and power of the traditional structure should not be designed too large; at the same time, in order to meet the application requirements of power supply capacity and working voltage in electric vehicles and other occasions, it is necessary to integrate dozens or even hundreds of monomers Batteries are combined in series and parallel to form large-capacity, high-voltage battery packs or modules. However, due to the consistency differences between individual cells and the limitations of battery screening methods, the overall performance of the battery combination is far inferior to that of the single cells. The available capacity and power of the battery pack are greatly reduced, the cycle life is also shortened, and the safety risk is increased. The battery pack with a large number of single cells also puts forward higher requirements for the battery pack management system BMS; The main factors for the wide application in the field of power

However, the bipolar structure also faces the same problem as lithium-ion batteries, that is, it is difficult to design a suitable liquid injection port in the foil-type electrode structure

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