Dual-source battery pack, management method and system, and electric vehicle

A technology of electric vehicles and battery packs, applied in electric vehicles, power management, electric traction, etc., can solve the problem of high cost of battery packs, achieve the effects of enhancing safety redundancy, eliminating mileage anxiety, and reducing overall costs
CN107539159BActive Publication Date: 2018-06-08AIWAYS AUTOMOBILE CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
AIWAYS AUTOMOBILE CO LTD
Publication Date
2018-06-08

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Abstract

The invention provides a dual-source battery pack, a management method and system and an electric vehicle. The dual-source battery pack comprises a main battery pack bin which comprises a main batterypack and a control unit and is fixed in the electric vehicle and an auxiliary battery pack bin which comprises an auxiliary battery pack and is detachably installed in the electric vehicle. The firstend and the second end of the DC / DC converter are connected to the total positive end and the total negative end of the auxiliary battery pack, the third end is connected with the total positive endand the total positive output end of the main battery pack, the fourth end is connected with the total negative end and the total negative output end of the main battery pack, and a charging and discharging path of the main battery pack and the auxiliary battery pack is formed. The control unit realizes charge and discharge control of the auxiliary battery pack by controlling the DC / DC converter.The battery cell standard of the main battery pack and the battery cell standard of the auxiliary battery pack are different. The dual-source battery pack reduces performance requirements of the auxiliary battery pack while guaranteeing the power and economy of the whole vehicle, and saves the cost compared with an original battery set by 10-30%.
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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 extension function, a management method and system, and an electric vehicle. Background technique

[0002] Electric vehicle EV (Electric Vehicle) is currently developing rapidly around the world. Affected by traditional driving habits, the requirement for long driving range of electric vehicle EVs has gradually become the mainstream trend. For example, the long driving range version of Tesla Model-S has the highest driving range. The pure electric driving range is nearly 500 kilometers, and Volkswagen also announced that it will launch an electric vehicle EV 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) configured in electric vehicles needs a larger capacity, generally more than 50kWh. The cost of the battery system an...

Claims

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