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Energy management method of vehicle composite energy storage system

A composite energy storage and energy management technology, which is applied in the field of energy management of vehicle composite energy storage systems, can solve the problems of few energy management methods, and achieve the effect of prolonging life and simple energy management methods

Active Publication Date: 2016-05-18
TSINGHUA UNIV
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  • Claims
  • Application Information

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Problems solved by technology

[0005] However, there are still few energy management methods that simply and effectively distribute the power output of batteries and supercapacitors

Method used

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  • Energy management method of vehicle composite energy storage system
  • Energy management method of vehicle composite energy storage system
  • Energy management method of vehicle composite energy storage system

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Embodiment Construction

[0015] The energy management method of the vehicle composite energy storage system provided by the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

[0016] see Figure 1-3 , the energy management method of the vehicle composite energy storage system provided by the embodiment of the present invention includes the following steps:

[0017] Step 1, judging the charging and discharging state of the composite energy storage system according to the working state of the vehicle, when the composite energy storage system is in the charging state, perform step 2, and when the composite energy storage system is in the discharging state, perform step 3;

[0018] Step 2, detecting the voltage V of the supercapacitor bank sc , and the voltage V of the supercapacitor bank sc with the full charge voltage of the supercapacitor bank V sc-max for comparison: when V sc sc-max When V sc =V sc-max , the regenerative braki...

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Abstract

The invention relates to an energy management method for a composite energy storage system for a vehicle. The composite energy storage system comprises a battery pack and a super-capacitor bank which are connected in parallel. The energy management method comprises the first step of judging whether the composite energy storage system is in a charging state or a discharging state according to the working condition of the vehicle, the second step of detecting the voltage Vsc of the super-capacitor bank when the composite energy storage system is in the charging state, and comparing the voltage Vsc of the super-capacitor bank with the full voltage Vsc-max of the super-capacitor bank, the third step of recovering regenerative braking energy generated in the vehicle braking process to the super-capacitor bank when Vsc<Vsc-max, and recovering the regenerative braking energy to the battery pack when Vsc=Vsc-max, and the fourth step of distributing output power of the super-capacitor bank and output power of the battery pack according to the voltage Vsc of the super-capacitor bank and the power Pdemand required by the whole vehicle when the composite energy storage system is in the discharging state.

Description

technical field [0001] The invention relates to an energy management method for a composite energy storage system for vehicles, in particular to an energy management method for a composite energy storage system for new energy vehicles. Background technique [0002] With the aggravation of energy crisis and environmental pollution, new energy vehicles have been gradually developed and entered people's lives little by little. to the market. But at present, new energy vehicles represented by electric vehicles are still being questioned, largely due to the bottleneck of battery technology. The current trend is to use lithium-ion batteries as energy storage devices for new energy vehicles, but lithium The price of ion batteries is still relatively high, and the power density is not high enough. In the actual use process, it is difficult to guarantee the service life, and it needs to be replaced regularly, which will further increase the cost of using new energy vehicles. It is ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60L11/18
CPCY02T10/70
Inventor 宋子由李建秋方川欧阳明高
Owner TSINGHUA UNIV
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