Dual-source battery pack and electric vehicle

Abstract

The invention provides a dual-source battery pack and an electric vehicle. The dual-source battery pack comprises a battery pack bin and a main battery pack, an auxiliary battery pack, a DC / DC converter and a control unit, wherein the main battery pack, the auxiliary battery pack, the DC / DC converter and the control unit are located in the battery pack bin. The first end and the second end of theDC / DC converter are connected with the total positive end and the total negative end of the auxiliary battery pack. The third end of the DC / DC converter is connected with the total positive end and the total positive output end of the main battery pack. The four end of the DC / DC converter is connected with the total negative end and the total negative output end of the main battery pack. A chargeand discharge path of the main battery pack and the auxiliary battery pack is formed. The control unit is connected with the DC / DC converter, the main battery pack and the auxiliary battery pack. Charging and discharging control of the auxiliary battery pack is realized by controlling the working states of the DC / DC converter. The core standards of the main battery pack and the auxiliary battery pack are different. By means of the dual-source battery pack, the power and economy of the electric vehicle are ensured, meanwhile, the performance requirement for the auxiliary battery pack is reduced, and the cost of the dual-source battery pack is saved by 10-30% compared with the cost of an original battery set.

Description

technical field [0001] The invention relates to the field of power batteries for electric vehicles, in particular to a dual-source battery pack with a range-extending function and the electric vehicle. Background technique [0002] Pure electric vehicle EV (Electric Vehicle) is currently developing rapidly around the world. Affected by traditional car driving habits, the requirement for long driving range of electric vehicles has gradually become a mainstream trend. For example, the Tesla Model-S long driving range version has the highest The pure electric mileage is nearly 500 kilometers, and Volkswagen also announced that it will launch an electric vehicle EV with a distance of more than 400 kilometers in the future. [0003] In order to meet the requirements of long driving range, the power battery system (Battery Pack) of electric vehicles needs to have a larger capacity, generally exceeding 50kWh. The cost of the battery system and the space occupied by the battery pac...

AI Technical Summary

Problems solved by technology

[0009] In view of the above-mentioned shortcomings of the prior art, the object of the present invention is to provide a dual-source battery pack and an electric vehicle to solve the problem of high cost of the battery pack of the electric vehicle in the prior art

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