Discharge control device and method for electric vehicle

A technology of electric vehicle and discharge control, which is applied in the direction of secondary battery charging/discharging, secondary battery repair/maintenance, AC network load balancing, etc., and can solve problems such as grid system burden, and achieve peak shaving and valley filling, simple and intuitive Operation screen, the effect of flexible discharge mode control

Active Publication Date: 2019-12-03
MITSUBISHI ELECTRIC CHINA CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In recent years, electric vehicles have been widely popularized, and their number is increasing. If such a large-scale electric vehicle is connected to the grid system, its charging and discharging behavior will cause a great burden on the grid system.

Method used

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  • Discharge control device and method for electric vehicle
  • Discharge control device and method for electric vehicle
  • Discharge control device and method for electric vehicle

Examples

Experimental program
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Effect test

Embodiment 1

[0055] In the first embodiment, the fixed setting mode is adopted as the first mode. The feature of this mode is that the daily driving distance of the electric vehicle is basically kept constant, and the user sets at least one of the fixed minimum battery remaining state of charge (minimum SoC) after discharge and the fixed daily cumulative maximum discharge capacity according to the driving distance. either side. By adopting this mode, the user does not need to perform operations every time, and the burden on the user can be reduced.

[0056] In the first embodiment, the storage unit 14 stores the current electricity price information, vehicle information and discharge mode setting as shown in Table 1 in the form of a database.

[0057] Table 1

[0058]

[0059]

[0060] According to Table 1, user A sets the minimum SoC to 40% through the setting screen of the UI, that is, keeps the SoC above 40% all the time, and stops discharging when the SoC reaches 40% during dis...

Embodiment 2

[0072] In the second embodiment, the checking mode of each discharge is adopted as the second mode. The feature of this mode is that the daily driving distance of electric vehicles varies greatly, and the user can set the remaining state of charge (SoC) of the battery after each discharge. By adopting this mode, users can flexibly set according to their own needs to obtain the greatest economic benefits.

[0073] In the second embodiment, the storage unit 14 stores the current electricity price information, vehicle information and discharge mode setting as shown in Table 2 in the form of a database.

[0074] Table 2

[0075]

[0076] According to Table 2, each time users D-F discharge, they perform a discharge confirmation operation, and set the SoC after discharge according to their own needs.

[0077] The following combination Figure 5 A diagram illustrating the operation process of the second embodiment of the discharge control device for electric vehicles. In Embodim...

Embodiment 3

[0092] The only difference between this embodiment 3 and embodiment 2 is that the vehicle information acquired by the vehicle information acquisition unit 11 also includes the past driving information of the electric vehicle 2 and the past battery state information, and the discharge mode adopts the third mode, and the third mode , the user inputs the next travel plan, and the discharge mode setting unit 15 can calculate the remaining state of charge (SoC) of the battery required for the travel plan based on the past travel information of the electric vehicle 2 and the past battery state information. as the lowest remaining state of charge of the battery after discharge.

[0093] Specifically, as the next driving plan, the user may directly input the next driving distance, or may input the current location and driving destination.

[0094] When using this mode, the user only needs to input the driving plan to ensure the required minimum battery power. The operation is simple a...

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Abstract

The invention relates to a discharge control device and method for an electric vehicle. The discharge control device for the electric vehicle is provided with: a vehicle information acquisition unit for acquiring, from a charging / discharging device, vehicle information for the electric vehicle, the vehicle information including the charging price of the electric vehicle during past charging; a current electricity price information acquisition unit that acquires current electricity price information including a current discharge price; a storage unit that stores the vehicle information acquiredby the vehicle information acquisition unit and the current electricity price information acquired by the current electricity price information acquisition unit; and a discharge condition determination unit that determines whether the current discharge income is greater than the charging cost at the time of past charging on the basis of the vehicle information stored in the storage unit and the current electricity price information or not, and transmits a discharge command to the charging / discharging device when it is determined that the current discharge income is greater than the charging cost at the time of past charging.

Description

technical field [0001] The present invention relates to a discharge control device and a discharge control method for an electric vehicle that control the discharge of an electric vehicle that is charged and discharged via a charging and discharging device. Background technique [0002] In recent years, electric vehicles have been widely popularized, and their number is increasing. If such a large-scale electric vehicle is connected to the grid system, its charging and discharging behavior will cause a great burden on the grid system. Therefore, how to optimize the charging and discharging control strategy of electric vehicles and reduce the charging cost on the user side while realizing the load balance of the grid system has become an important issue. At present, there have been many researches on the charging and discharging control strategies of electric vehicles in the prior art. For example, the time-based time-of-use electricity price and the space-based node electri...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/32H01M10/44
CPCH01M10/44H02J3/32Y02E60/10
Inventor 关瑞邱郑仰东堀卓司
Owner MITSUBISHI ELECTRIC CHINA CO LTD
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