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Grid-connected and off-grid photovoltaic charging method and household energy storage system

A photovoltaic system and charging method technology, applied in the direction of power network operating system integration, system integration technology, information technology support system, etc., can solve the problems of end-user economic losses, inability to limit battery charging, etc., and achieve the effect of saving electricity costs

Inactive Publication Date: 2020-06-19
SHENZHEN POWEROAK NEWENER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There is usually a difference in peak and valley electricity prices when buying electricity from the grid. The charging strategy provided by the existing technology is a fixed charging method. As long as the grid returns to normal and the remaining battery capacity is less than a certain value, the battery will be automatically replenished. It is impossible to charge the battery during the valley electricity price, and users will have to spend more money to buy electricity. Therefore, the traditional way of charging and supplying power will bring greater economic losses to end users

Method used

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  • Grid-connected and off-grid photovoltaic charging method and household energy storage system
  • Grid-connected and off-grid photovoltaic charging method and household energy storage system
  • Grid-connected and off-grid photovoltaic charging method and household energy storage system

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Embodiment Construction

[0092] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments It is a part of embodiments of the present invention, but not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0093] In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not constitute a conflict with each other.

[0094] see figure 1 , the embodiment of the present invention provides a household energy storage system 100 , including a batt...

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Abstract

The invention relates to the technical field of photovoltaic charging and energy storage, in particular to a grid-connected and off-grid photovoltaic charging method and a household energy storage system. According to the method, in a grid-connected state, firstly, electric quantity information of a battery is obtained, then, when the electric quantity information is lower than or equal to a preset electric quantity threshold value, a charging system for charging the battery is determined, the charging system comprises a photovoltaic system or a power grid system, and finally, the charging system is controlled to charge the battery. By means of the mode, in the actual process of electricity purchasing and electricity utilization, a backup power supply with flexible chargeing can be selectively provided for a user, and therefore, the electricity utilization cost of the user is saved.

Description

technical field [0001] The invention relates to the technical field of photovoltaic charging and energy storage, in particular to an on-grid and off-grid photovoltaic charging method and a household energy storage system. Background technique [0002] With the adjustment and development of the energy structure of the whole society, the reduction of battery costs and the improvement of people's awareness of clean energy, household energy storage products are increasingly selected as household appliances and appear in thousands of households. The application fields of energy storage products are also becoming more and more extensive, such as being applied to homes, schools, shopping malls, hospitals, government office buildings, churches, parking lots, farms and so on. The application mode of energy storage products is usually called functional mode. Common energy storage products provide functional modes such as peak-shaving and valley-filling mode, backup power mode, matchin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J3/38H02J7/00H02J13/00
CPCH02J7/0029H02J7/0068Y02B10/10Y02B70/30Y02E40/70Y04S10/123Y04S20/242
Inventor 尹相柱苏岩马辉雷健华秦庚
Owner SHENZHEN POWEROAK NEWENER
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