A battery system

Abstract

The invention provides a battery system comprising a plurality of battery modules the number of which can be increased, and a control unit. The battery module comprises a frame on which multiple containing grooves are disposed to contain multiple first battery cores and second battery cores, wherein the first battery cores and the second battery cores are not the same types, and two conductive sheets which arranged in the frame oppositely and which are electrically connected with the first battery cores and the second battery cores. The control unit is a travelling computer electrically connected with the conductive sheets and an electric vehicle and is used for enabling a specific first battery or second battery core to supply power to the electric vehicle according to the various operation states of the electric vehicle. Thus, the number of the battery modules can be increased according to the power demand of the electric vehicle. Optimum power supplying efficiency and electric vehicle operation efficiency can be obtained by using a manner of controlling the first and the second battery cores to supply power to the electric vehicle at different time.

Description

technical field [0001] The invention is related to battery technology of electric vehicles, especially a battery system capable of supplying power in response to different operating modes of electric vehicles. Background technique [0002] At present, electric vehicles (electric vehicles, electric locomotives) are gradually accepted and favored by people in various countries due to factors such as energy conservation and carbon reduction. At present, all major car manufacturers in the world are conducting related research and development and sales. [0003] There are many schools of thought on the system design of electric vehicles. However, the main source of power is batteries. The characteristics of battery life and power supply stability are very important for electric vehicles. The batteries used in early electric locomotives were lead-acid batteries, because lead-acid batteries have the advantages of large electromotive force, simple structure, wide operating temperatu...

AI Technical Summary

Problems solved by technology

The batteries used in early electric locomotives were lead-acid batteries, because lead-acid batteries have the advantages of large electromotive force, simple structure, wide operating temperature, mature technology and low price. However, they have environmental protection problems, heavy weight and short service life, etc. The shortcomings to be overcome, the lithium battery (lithium iron phosphate battery) gradually developed in recent years, its cycle life is 5 times that of lead-acid batteries, the discharge power is 6.6 times that of lead-acid batteries, and the charging time is less than 2 hours, only It needs 1 / 4 of the lead-acid battery, the volume and weight is only 50% of the lead-acid, and there is no memory effect. Therefore, at present, electric vehicles mostly use lithium batteries as the power source

However, the current production cost of lithium batteries is still not low, accounting for more than 50% of the cost of electric vehicles. Whether electric vehicles can be popularized smoothly in the future depends on the improvement of battery technology and the reduction of costs.

[0004] Secondly, an electric vehicle often needs three to five thousand lithium batteries (battery cells) to be discharged at the same time with a large current, resulting in very high temperature. The high heat will not only cause the lithium battery's performance to decay rapidly, but also cause the entire vehicle to explode. The risk of burning out, although there are many battery management technologies that can maintain the best performance of the battery without overheating, and there are many related patents, so I won’t go into details here. Under the framework, the problem of temperature rise cannot be really solved, and the simultaneous discharge of a large number of batteries is not the most efficient way to use power

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