CN106130181A - A kind of domestic intelligent power supply - Google Patents

Abstract

The invention provides a household intelligent power supply, which belongs to the technical field of electronics. It solves the problem that the household power supply cannot realize remote monitoring in the prior art. This home intelligent power supply includes power input, control system, battery module and power output. The power input, power output, and battery module are all electrically connected to the control system. The control system includes BMS module, inverter module, and Internet of Things module. and the remote control terminal, the input terminal of the inverter module is connected to the power input terminal, the output terminal of the inverter module is connected to the power output terminal, the battery module is connected to the inverter module through the BMS module, and the IoT module is connected to the BMS module It is connected with the inverter module, and the remote control terminal communicates with the IoT module through the communication network. The smart power supply for home use can realize remote monitoring, has strong practicability and good safety.

Description

A household intelligent power supply

technical field

The invention belongs to the field of electronic technology and relates to a household intelligent power supply.

Background technique

As a part of the power grid, the home smart power supply can be used as a distributed energy storage device for the power grid and can be managed in a unified manner in the case of increasingly tense electric energy in the future. Since most of the current electricity consumption is concentrated in the daytime, the daytime becomes the peak period of electricity consumption, resulting in the situation of different time electricity consumption in many areas. But at night, it becomes a low power consumption, which makes the grid power insufficient during the day and surplus at night. Although power grid companies can alleviate the pressure of insufficient power supply during the day by building super energy storage power stations, the cost of building super energy storage power stations is high. It will also increase the load on the line.

Contents of the invention

The present invention aims at the above-mentioned problems existing in the prior art, and provides a household intelligent power supply, which realizes the regular charging and discharging function through remote monitoring.

The purpose of the present invention can be achieved through the following technical solutions: a household intelligent power supply, including a power input terminal, a control system, a battery module and a power output terminal, the power input terminal, power output terminal, and battery module are all connected to the control system connection, characterized in that the control system includes a BMS module, an inverter module, an Internet of Things module and a remote control terminal, the input terminal of the inverter module is connected to the power input terminal, and the output terminal of the inverter module terminal is connected to the output terminal of the power supply, the battery module is connected to the inverter module through the BMS module, the IoT module is connected to the BMS module and the inverter module respectively, and the remote control terminal is connected to the IoT module through a communication network Module communication.

In the above-mentioned household intelligent power supply, the BMS module includes a BMS management unit, an acquisition unit and an equalization unit, the input end of the BMS management unit is connected to the battery module, and the output end of the BMS management unit is connected to the inverter module connection, the acquisition unit includes a current sensor and a relay, the current sensor is connected in series between the input end of the BMS management unit and the battery module, and the relay is connected in series between the output end of the BMS management unit and the inverter module, The balancing unit is used to automatically balance the batteries when the battery voltage in the battery box is inconsistent or exceeds a specified value, and the charging current is less than a certain value. The acquisition unit can measure multi-cell battery terminal current and relay control, and can be installed in each battery module.

In the aforementioned household smart power supply, the acquisition unit further includes a plurality of temperature sensors connected to the BMS management unit, and the plurality of temperature sensors are evenly arranged in the battery module. By arranging several temperature sensors, the overall temperature of the battery module can be detected to prevent the temperature of the battery module from being too high. As a preferred solution, four temperature sensors are provided, which are evenly arranged in the battery module.

In the aforementioned household smart power supply, the BMS module further includes a display unit connected to the BMS management unit, and the display unit is used for displaying the status of the battery module and displaying various parameters of the SOC.

In the aforementioned household smart power supply, the inverter module further includes a photovoltaic power generation interface input terminal. By setting the input terminal of the photovoltaic power generation interface, the home intelligent power supply can have the function of photovoltaic expansion charging, and realize photovoltaic charging by cooperating with photovoltaic power generation equipment.

In the aforementioned household smart power supply, the IoT module is connected with a wireless transmission antenna. The wireless communication between the Internet of Things module and the remote control terminal is realized by setting the wireless transmission antenna, which improves the convenience and adaptability of the remote control terminal monitoring.

In the aforementioned household smart power supply, the storage battery module includes several lithium batteries connected in series.

In the aforementioned household smart power supply, the lithium battery is a lithium iron phosphate battery. Lithium iron phosphate batteries are safer, less prone to failure or explosion, and safer and more reliable for household use.

In the aforementioned household smart power supply, the remote control terminal is a smart phone or a network terminal. The use of smart phones or network terminals has enriched the diversity of remote control terminals, and with the popularization of smart phones, the real-time and convenience of remote monitoring have been improved.

Compared with the prior art, the advantages of the present invention are as follows: the home intelligent power supply can realize remote controllable uninterruptible power supply through the Internet of Things, and the setting and monitoring of the power supply can be realized through mobile phones or network terminals; the lithium iron phosphate battery is used It is powered and equipped with an automotive-grade lithium battery management system for monitoring, which is safer and more environmentally friendly in terms of batteries; equipped with a photovoltaic power generation interface input terminal, it can also be charged when the grid is out of power, which is more practical.

Description of drawings

Fig. 1 is a schematic circuit diagram of a household intelligent power supply in the present invention.

detailed description

The following are specific embodiments of the present invention and in conjunction with the accompanying drawings, the technical solutions of the present invention are further described, but the present invention is not limited to these embodiments.

As shown in Figure 1, the home smart power supply includes a power input terminal, a control system, a battery module, and a power output terminal. The power input terminal, power output terminal, and battery module are all electrically connected to the control system. The control system includes a BMS module, an inverter Inverter module, IoT module and remote control terminal, the input terminal of the inverter module is connected to the input terminal of the power supply, the output terminal of the inverter module is connected to the output terminal of the power supply, and the battery module is connected to the inverter module through the BMS module. The networking module is connected to the BMS module and the inverter module respectively, and the remote control terminal communicates with the IoT module through the communication network.

Specifically, the BMS module includes a BMS management unit, an acquisition unit, and an equalization unit. The input end of the BMS management unit is connected to the battery module, the output end of the BMS management unit is connected to the inverter module, and the equalization unit is used to act as the battery in the battery box. When the voltage is inconsistent or exceeds the specified value, and the charging current is less than a certain value, the battery will be automatically balanced. Among them, the acquisition unit includes a current sensor, a relay and several temperature sensors, the current sensor is connected in series between the input terminal of the BMS management unit and the battery module, the relay is connected in series between the output terminal of the BMS management unit and the inverter module, and the temperature sensor is set The four are evenly arranged in the battery module respectively, and can detect the overall temperature of the battery module to prevent the temperature of the battery module from being too high. Among them, the BMS management unit adopts the automotive-grade lithium battery management system, which makes the battery of the home smart power supply safer and more environmentally friendly.

In addition, the BMS module also includes a display unit connected to the BMS management unit, and the display unit is used to display the status of the battery module and various parameters of the SOC.

The BMS module can realize the following functions:

1. Overcharge protection: When the battery is charging and the highest single voltage of the battery module exceeds 3.65V (protection voltage), the inverter module will be turned off for charging.

2. Over-discharge protection: When the battery is in discharge condition, the minimum single voltage of the battery module exceeds 2.65V (protection voltage), so that the inverter module switches to AC power supply or stops output.

3. Temperature protection: When the battery temperature exceeds 65°C, the inverter module will be turned off for charging and discharging.

4. Current protection: When the charging or discharging current is greater than the set condition, the charging current is 15A, the discharging current is 80A, and the main relay will be turned off for 5 seconds.

5. SOC calculation: Calculate SOC through current sensor and other conditions to ensure SOC ≤ 6%.

6. Communication: The BMS transmits the data to the WIFI module through the Internet of Things module to upload the data to the remote server, and the internal control commands are also transmitted to the inverter module through 485 communication for control.

In this embodiment, the inverter module is provided with overload protection, short circuit protection, overvoltage protection, undervoltage protection, and overtemperature protection function modules, and is also provided with a photovoltaic power generation interface input terminal. By setting the input terminal of the photovoltaic power generation interface, the home intelligent power supply can have the function of photovoltaic expansion charging, and realize photovoltaic charging by cooperating with photovoltaic power generation equipment.

The Internet of Things module is connected with a wireless transmission antenna, and the remote control terminal is a smart phone or a network terminal. The wireless transmission antenna can use 485 communication or GPRS communication for remote wireless connection. In this way, the home intelligent power supply can realize remote controllable uninterruptible power supply, and can realize the setting and monitoring of the power supply through mobile phones or network terminals. The connection method is to connect the router through WIFI to realize the Internet of Things, but if there is no router, it can also be directly connected to it through the mobile phone for setting and monitoring.

The battery module includes several lithium batteries connected in series, specifically 10-20 strings, preferably 15 strings. It should be noted that the lithium battery in this embodiment is a 120Ah lithium iron phosphate lithium battery. Lithium iron phosphate batteries are safer, less prone to failure or explosion, and safer and more reliable for household use. The battery module uses six degrees of electricity as the smallest unit, which can be increased according to the needs of customers, and the daily power supply of the equipment can be met for household use.

The working principle of the household smart power supply is as follows:

Users can use smart phones or network terminals to set and monitor smart power supplies through the Internet of Things. The user can set the charging and discharging time when the grid has power. For example, the smart power supply can be set to: charge the battery during the low power consumption period and discharge it during the peak power consumption period; in addition, it can automatically switch to It is output by the battery module, and the BMS module in the smart power supply passes the electric quantity of the battery module through the current sensor. The specific process is as follows:

1. When the SOC of the battery module is > 35% and the grid has electricity, the input power (48V lithium battery or 220VAC) of the smart power supply is selected to work according to the time period set by the user.

2. When the battery module is in extreme power loss SOC<5%, but the grid has power, the smart power supply will start the charger in time to convert the AC power of the grid into DC to charge the battery module, and the BMS will calculate the power of the battery module. When the battery When the SOC of the module is ≥ 20%, it will start charging according to the time period set by the customer.

3. When the SOC of the battery module is > 35% and there is no electricity in the grid, the smart power supply will immediately start the battery module to provide current output to the load, and use the inverter module to convert the DC power in the battery module into AC and output it to the load until the battery module Stop current output when power loss SOC<5%, and the remaining power is to ensure the normal operation of the product.

4. In addition, the smart power supply can also be connected to the photovoltaic power generation device through the input terminal of the photovoltaic power generation interface, so that the battery can be charged through the photovoltaic power generation device.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which the present invention belongs can make various modifications or supplements to the described specific embodiments or adopt similar methods to replace them, but they will not deviate from the spirit of the present invention or go beyond the definition of the appended claims range.

Claims (9)

1. A household intelligent power supply, comprising a power input terminal, a control system, a storage battery module and a power supply output terminal, the power supply input terminal, the power supply output terminal, and the storage battery module are all electrically connected to the control system, it is characterized in that the control system It includes a BMS module, an inverter module, an Internet of Things module and a remote control terminal, the input terminal of the inverter module is connected to the power supply input terminal, the output terminal of the inverter module is connected to the power supply output terminal, and the battery The module is connected to the inverter module through the BMS module, the IoT module is connected to the BMS module and the inverter module respectively, and the remote control terminal communicates with the IoT module through a communication network. 2. A household intelligent power supply according to claim 1, wherein the BMS module includes a BMS management unit, an acquisition unit and an equalization unit, the input end of the BMS management unit is connected to the battery module, and the BMS The output end of the management unit is connected to the inverter module, the acquisition unit includes a current sensor and a relay, the current sensor is connected in series between the input end of the BMS management unit and the battery module, and the relay is connected in series with the output of the BMS management unit Between the terminal and the inverter module, the balancing unit is used to automatically balance the batteries when the battery voltage in the battery box is inconsistent or exceeds a specified value, and the charging current is less than a certain value. 3. A household intelligent power supply according to claim 2, characterized in that the acquisition unit further comprises a plurality of temperature sensors connected to the BMS management unit, and the plurality of temperature sensors are evenly arranged in the battery module. 4. A household smart power supply according to claim 2 or 3, wherein the BMS module further comprises a display unit connected to the BMS management unit, the display unit is used to display the state of the battery module and Various parameters of the SOC. 5 . The household intelligent power supply according to claim 1 , 2 or 3 , wherein the inverter module further includes an input terminal of a photovoltaic power generation interface. 6 . 6. A household intelligent power supply according to claim 1, 2 or 3, wherein the IoT module is connected with a wireless transmission antenna. 7. A household intelligent power supply according to claim 1, 2 or 3, characterized in that the battery module includes several lithium batteries connected in series. 8. A household intelligent power supply according to claim 7, wherein the lithium battery is a lithium iron phosphate battery. 9. A household intelligent power supply according to claim 1, 2 or 3, wherein the remote control terminal is a smart phone or a network terminal.