Lead-free battery and vehicle system using the same

Abstract

It is possible to provide a high-performance and high-capacity secondary cell without containing polluting substance such as lead in an electrode plate or sulfuric acid in electrolyte. It is also possible to provide a vehicle system which uses a lead-free battery of higher performance and higher capacity than a lead battery without using lead or sulfuric acid causing pollution and has more excellent high-speed charge/discharge characteristics than the lead battery, which enables a long-distance travel by external charging at once. Provided is a secondary battery including: an anode having an electrode containing calcium, silver oxide, and carbon; a cathode has an electrode containing zinc and carbon; and alkali aqueous solution as electrolyte. By using the lead-free battery, there is provided the vehicle system including a first and a second battery pack, an in-wheel generator attached to a wheel, a vehicle power motor, and a charge/discharge switching device having a control unit for automatically switching between the first and the second battery pack.

Description

technical field [0001] The present invention relates to a lead-free battery as a high-performance, high-capacity secondary battery that does not use lead in an electrode plate, does not use sulfuric acid in an electrolytic solution, and does not use lead, sulfuric acid, and other pollutant-causing substances, and uses the battery to quickly The above-mentioned lead-free battery having better charging and discharging characteristics than the lead battery is suitable for a vehicle system used as a secondary battery in a vehicle. Background technique [0002] A lead battery using lead as an electrode and sulfuric acid as an electrolyte has been popularized as a typical secondary battery for a long period of time, and its material and structure have been improved to improve performance and lifespan. That is, through the improvement of the plate, diaphragm, battery case, etc., a maintenance-free, sealed battery can be achieved. [0003] However, in addition to the problems of lo...

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Problems solved by technology

[0009] However, lithium-ion batteries have problems in that they are expensive to manufacture and have a cycle life of about 300 cycles, which is lower than the cycle life of lead batteries of about 1,000 cycles, resulting in higher operating costs.

One of them is that the energy capacity per unit volume is low, and when used in a vehicle, it is too heavy, resulting in a large volume

[0015] In addition, when the internal resistance of the lead battery increases due to sulfidation as described above, the waste of sulfuric acid and lead and other pollutants of the lead battery becomes a problem in the vehicle system

[0016] Especially when using lead batteries for vehicles under heavy loads, both the plates and the electrolyte are consumed, but in the case of sealed batteries, there are disadvantages such as the inability to replace the plates and replenish the electrolyte, which is also the case for vehicle systems. inconvenient

[0017] Patent Document 1 improves the internal structure of the lead battery so that it can withstand heavy loads for vehicles, but anyway, the lead battery as a secondary battery limits the improvement of the vehicle system

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