Small module battery stacking type household photovoltaic energy storage station

Abstract

The utility model discloses a small module battery stacking type household photovoltaic energy storage station which comprises batteries, a cabinet body, an inverter, an interaction system and an electric energy management system. The battery is used for storing electric energy; the cabinet body comprises an electrical circuit and a communication circuit, a plurality of battery cylinders are arranged on the cabinet body, and batteries are connected to the electrical circuit and the communication circuit by being inserted into the battery cylinders. The electric energy management system comprises a charging and discharging module, a communication module and a logic control module. The inverter comprises a photovoltaic module, a mains supply module, a bidirectional inversion module, a voltage transformation module and a charging module, the photovoltaic module is used for being connected with a solar power generation device, the mains supply module is used for being connected to a mains supply power grid or a diesel generator, and the output end of the bidirectional inversion module is connected to a household electricity load; the voltage transformation module is connected to the battery discharging port through an electrical circuit of the cabinet body, and the charging module is connected to the battery charging port through the electrical circuit of the cabinet body; and the interaction system is used for displaying information and operating the equipment by a user. According to the energy storage station provided by the utility model, the energy storage batteries are divided into a plurality of modularized small batteries, and the modularized small batteries can be taken out to be used for other electric equipment, so that the flexibility and the adaptability are enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of new energy, and in particular to a small-module stacked household energy storage station. Background Art

[0002] As the energy revolution sweeps the world, it has become an irreversible trend for electricity to replace fossil energy as the direct energy source; along with this, batteries as energy storage will also be suitable for more and more electrical devices and scenarios.

[0003] Based on this, the concept of a home-type photovoltaic energy storage station has been proposed. Most of the existing energy storage devices have integrated batteries, which fully meet the power demand by setting up large-capacity batteries. The disadvantage of this technology and product is that it is not flexible enough to use. The battery charging and discharging adopts the same charging and discharging mode. As part of the energy storage station, the battery cannot be pulled out separately. It is impossible to use multiple modular battery units, and thus it is impossible to achieve efficient and independent charging and discharging management of multiple modular batteries. It is even more impossible to pull out the battery when it is idle and apply it to other electrical equipment. Utility Model Content

[0004] In view of the above problems, the purpose of the utility model is to provide a small module battery stacked household photovoltaic energy storage station, and the technical solution is as follows.

[0005] A battery, wherein the battery is used to store electrical energy, and the number of the battery is multiple;

[0006] A cabinet, wherein an electrical circuit, a communication circuit and a battery cartridge are arranged in the cabinet, wherein a charging circuit and a discharging circuit in the electrical circuit are separated independently; and the battery is connected to the electrical circuit and the communication circuit by inserting the battery cartridge;

[0007] An electric energy management system, the electric energy management system comprising a charging and discharging module, a communication module and a logic control module;

[0008] The inverter includes a photovoltaic module, a mains module, a bidirectional inverter module and a charging module; the photovoltaic module is used to connect to a solar power generation device, the mains module is used to connect to a mains power grid or an external power supply device, the output end of the bidirectional inverter module is used to connect to a household power load, the battery end interface of the bidirectional inverter module is connected to the battery through a discharge circuit of a cabinet, and the charging module is connected to the battery through a charging circuit of the cabinet.

[0009] In some preferred embodiments, an interactive system is also included, and the interactive system is used for information display and user operation of the device.

[0010] In some preferred embodiments, the cabinet is further provided with a battery ejection mechanism for ejecting the battery from the battery cylinder when taking out the battery.

[0011] In some preferred embodiments, each battery is provided with a battery connector and a battery protection circuit board, and the battery connector is provided with a communication pin, a scene pin, a position identification pin and a power pin for charging and discharging separately; the battery contains a unique ID code, and the battery connector is electrically connected to the protection circuit board.

[0012] In some preferred embodiments, the cabinet is composed of a stacking structure, including a top compartment, a battery compartment and a base; the power management system, the inverter and the interactive system are located in the top compartment; the battery cartridge is located in the battery compartment; the number of battery compartments can be reduced or increased according to the power consumption demand of the user. The number of batteries in the battery compartment is 6. The total number of batteries decreases or increases as the number of battery compartments decreases or increases according to the power consumption demand of the user.

[0013] In some preferred embodiments, a battery compartment connector is provided at the bottom of the battery cartridge, and after the battery is inserted into the battery cartridge, it is connected to the electrical circuit and the communication circuit through the battery connector and the battery compartment connector that cooperate with each other.

[0014] In some preferred implementations, the power management system uses CAN communication with the battery, inverter, and interactive system.

[0015] In some preferred embodiments, the battery connector is provided with 3 power pins, 3 communication pins, 1 scene pin, and 4 position identification pins.

[0016] In some preferred embodiments, the interactive system can achieve communication between the device and the cloud via Bluetooth or WiFi connection.

[0017] Beneficial effects: The photovoltaic energy storage station provided by the utility model adopts small-module standardized batteries, an electrical circuit and an energy management system that can be charged and discharged independently, and the batteries can be hot-swapped. The removed batteries can be used for other electrical equipment, making the usage scenarios more diverse. When the battery power is exhausted and plugged back into the energy storage cabinet, the battery can be charged separately immediately without affecting the discharge of other batteries at the same time.

[0018] It has the ability to identify the battery position and bind and unbind the battery and the position, so as to realize the refined intelligent management of the battery inserted into the energy storage station. For example, the battery position can be accurately displayed in the APP, the battery can be accurately pushed out when the user takes the battery, and the problem battery can be accurately located. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of an energy storage station in one embodiment of the utility model.

[0020] Figure 2It is a structural schematic diagram of a cabinet in one embodiment of the utility model.

[0021] Figure 3 It is a structural schematic diagram of a battery in one embodiment of the utility model.

[0022] Figure 4 It is a functional block diagram of the electric energy management system in the utility model.

[0023] Figure 5 It is a functional block diagram of the inverter in the utility model.

[0024] Figure 6 It is a structural schematic diagram of a plug connector in one embodiment of the utility model.

[0025] Figure 7 It is a block diagram of the electrical circuit and the communication circuit in the utility model. DETAILED DESCRIPTION

[0026] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0027] like Figure 1 A small-module stacked household photovoltaic energy storage station is shown, including a battery 110 , a cabinet 120 , an energy management system 130 , an inverter 140 and an interactive system 150 .

[0028] like Figure 2 As shown, the cabinet 120 includes a top compartment 121, a battery compartment 122 and a base 123. The power management system 130, the inverter 140 and the interactive system 150 are located in the top compartment 121. The battery compartment 122 has a battery compartment connector 124, a battery ejection mechanism 125, an in-compartment communication board 126 and a battery cartridge 127.

[0029] like Figure 3 As shown, the battery 110 includes a battery connector 111 for connecting to a device and a protection circuit board 112 for power management.

[0030] like Figure 4 As shown, the power management system 130 of the energy storage station includes a charging and discharging module 131, a logic control module 132 and a communication module 133. The power management system is the brain of the energy storage station, which monitors and controls the work of each part of the energy storage station.

[0031] like Figure 5 As shown, the inverter 140 includes a photovoltaic module 141 , a mains module 142 , a bidirectional inverter module 143 , a transformer module 144 and a charging module 145 .

[0032] In specific implementation, combined with Figure 7When the sun is bright, the electricity generated by solar energy enters the bidirectional inverter module 143 through the photovoltaic module 141 of the inverter 140 to supply the household load. The photovoltaic module 141 tracks the system power in real time to control the photovoltaic power generation. If the battery needs to be charged at this time, the electricity generated by solar energy will enter the charging module 145 through the transformer module 144 in addition to supplying the household load, and enter the charging and discharging module 131 of the power management system 130 through the charging circuit 104, and then charge the battery through the charging circuit 104 and the charging port of the battery. If the battery does not need to be charged or the solar power generation power is still surplus, the electricity generated by solar energy will also enter the mains module 142 through the bidirectional inverter module 143 to transmit the electricity to the mains network for grid-connected sales.

[0033] Insufficient sunlight or no sunlight means that the solar power is not enough for household loads. In the preferred case, the power of the battery 110 enters the charge and discharge module 131 of the power management system 130 through the battery discharge port and the discharge circuit 106, and then enters the transformer module 144 of the inverter 140 through the discharge circuit 106 and then enters the bidirectional inverter module 143 to supply power to household loads. If the battery power is completely used up and there is no input of solar power generation, the household load will be directly powered by the mains module 142. At the same time, it is determined whether to charge the battery according to the user's settings.

[0034] The communication module 133 of the power management system 130 is connected to each device in the energy storage station through the communication circuit 103 and the communication board 126 in the warehouse, and obtains the status information of the battery 110, the inverter 140, and the interactive system 150 in real time, receives instructions from each device, and sends instructions to control the actions of each device through the logic judgment of the logic control module 132 to complete the above-mentioned charge and discharge power management. When the battery needs to be discharged, the battery 110, under the control of the power management system 130, selects 6 batteries with similar power and the best health at the same time to discharge to the outside as a group, and selects 6 batteries to take over and discharge to the outside before the power of a group of batteries is used up. Until all the batteries are used up. Such a design is conducive to ensuring that there are batteries with sufficient power to the maximum extent during the use of the energy storage station. Users can pull out the idle batteries in the energy storage cabinet and use them for other electrical devices based on this modular battery at home, such as outdoor portable inverters, lawn mowers, electric two-wheeled vehicles, etc.

[0035] When the battery is inserted back into the energy storage station, the battery connector 111 is combined with the battery compartment connector 124. Figure 6As shown, the battery detects whether the battery is in a multi-battery scenario through the level signal of the scene identification pin on the battery compartment connector 124. If the scene identification pin 7 is grounded (connected to its own pin 11), it is a multi-battery scenario, otherwise it is a single-battery scenario. In a multi-battery scenario, the battery can only open the charge / discharge port through the instruction of the power management system 130 of the top compartment. The battery can also detect the physical position of the battery in the energy storage station through the level signal combination of the address identification pins 8 / 9 / 10 on the battery compartment connector 124. The relationship between the address and the level signal combination is shown in the following table.

[0036]

[0037] Insufficient sunlight or no sunlight means that the electricity generated by solar energy is not enough for household loads. In the preferred case, the electric energy stored in the battery 110 is used to supply household loads. If a battery that has been used up on an external device is plugged back into the energy storage station, the AC power module 141 of the inverter 140 can enter the charging module 145, and the charging circuit 104 and the battery charging port can charge the battery. The battery that is discharging enters the inverter 140 transformer module 144 through the battery discharge port and the discharge circuit 106, and then enters the bidirectional inverter module 143 to supply power to household loads. The two circuits do not interfere with each other, so that one part of the battery is discharged while another part is charged.

[0038] In some preferred embodiments, any one of the aforementioned small-module stacked household energy storage stations is used, and the number of small-module stacked household energy storage stations is at least two, so as to increase power supply and thereby achieve high-power supply.

[0039] In some preferred embodiments, any one of the aforementioned small-module stacked household energy storage stations is used, and the number of small-module stacked household energy storage stations is three to achieve three-phase power supply.

[0040] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field based on the concept of the utility model through logical analysis, reasoning or limited experiments on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. A small module battery stacked household photovoltaic energy storage station, It is characterized in that include: A battery, wherein the battery is used to store electrical energy, and the number of the battery is multiple; A cabinet, wherein an electrical circuit, a communication circuit and a battery cartridge are arranged in the cabinet, wherein a charging circuit and a discharging circuit in the electrical circuit are separated independently; and the battery is connected to the electrical circuit and the communication circuit by inserting the battery cartridge; An electric energy management system, the electric energy management system comprising a charging and discharging module, a communication module and a logic control module; The inverter includes a photovoltaic module, a mains module, a bidirectional inverter module and a charging module; the photovoltaic module is used to connect to a solar power generation device, the mains module is used to connect to a mains power grid or an external power supply device, the output end of the bidirectional inverter module is used to connect to a household power load, the battery end interface of the bidirectional inverter module is connected to the battery through a discharge circuit of a cabinet, and the charging module is connected to the battery through a charging circuit of the cabinet.

2. The small module battery stacked household photovoltaic energy storage station according to claim 1, Features: It also includes an interactive system, which is used for information display and user operation of the device.

3. The small module battery stacked household photovoltaic energy storage station according to claim 1, Features: The cabinet is also provided with a battery pushing mechanism for pushing the battery out of the battery tube when taking out the battery.

4. The small module battery stacking household photovoltaic energy storage station according to claim 1, Features: Each battery is provided with a battery connector and a battery protection circuit board. The battery connector is provided with a communication pin, a scene pin, a position identification pin and a power pin for separate charging and discharging. The battery contains a unique ID code, and the battery connector is electrically connected to the protection circuit board.

5. The small module battery stacking household photovoltaic energy storage station according to claim 2, Features: The cabinet is composed of a stacking structure, including a top compartment, a battery compartment and a base; the power management system, the inverter and the interactive system are located in the top compartment; The battery cylinder is located in the battery compartment.

6. The small module battery stacking household photovoltaic energy storage station according to claim 4, Features: A battery compartment connector is provided at the bottom of the battery cartridge. After the battery is inserted into the battery cartridge, it is connected to the electrical circuit and the communication circuit through the battery connector and the battery compartment connector that cooperate with each other.

7. The small module battery stacking household photovoltaic energy storage station according to claim 2, Features: The power management system uses CAN communication with the battery, inverter and interactive system.

8. The small module battery stacking household photovoltaic energy storage station according to claim 4, Features: The battery connector is provided with 3 power pins, 3 communication pins, 1 scene pin and 4 position identification pins.

9. The small module battery stacking household photovoltaic energy storage station according to claim 2, Features: The interactive system can realize communication between the device and the cloud via Bluetooth or WiFi connection.

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