Household energy management system

Abstract

The utility model provides a household energy management system. Comprising a power grid connection control module, a load module, an energy storage battery module, an electric vehicle module, a photovoltaic module, an alternating current terminal module and a main circuit conversion terminal module, the input end of the power grid connection control module is connected with a power grid incoming line, the output end of the power grid connection control module is connected with the input end of the main path conversion terminal module, and the output end of the main path conversion terminal module is connected with the input end of the load module; the input end of the energy storage battery module is connected with a power grid incoming line, and the output end of the energy storage battery module is connected with the input end of the main path conversion terminal module; the output end of the photovoltaic module is connected with the input end of the main path conversion terminal module; the input end of the electric vehicle module is connected with the output end of the main path conversion terminal module, the output end of the electric vehicle module is connected with the input end of the alternating current terminal module, and the output end of the alternating current terminal module is connected with the input end of the energy storage battery module and the input end of the load module. The power consumption can be reduced, and the power utilization efficiency can be improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power management, in particular to a household energy management system. BACKGROUND

[0002] Electricity is widely used in our daily life and production. With the development of economy and society, the demand for electricity continues to increase. The efficiency of electricity production, transmission and use has an important impact on sustainable economic development and environmental protection. Residential electricity consumption accounts for 36.6% of total electricity consumption. However, current research shows that residential electricity consumption is inefficient and wasteful. Therefore, people are increasingly concerned about the continuation of smart grids at the residential level, i.e. household energy management systems.

[0003] Currently, existing household energy management systems generally enable one-way energy flow, i.e. electricity is centrally produced by a small number of large-capacity power plants, then transmitted to the user side through large-scale power transmission and distribution networks, and finally consumed by users. In this mode, household users are only consumers of electricity and passively participate in the operation of the power grid, which still has a large amount of electricity loss and low electricity efficiency. CONTENT OF THE INVENTION

[0004] In order to reduce electricity loss and improve electricity efficiency, the present application provides a household energy management system.

[0005] A household energy management system comprises a power grid connection control module, a load module, an energy storage battery module, an electric vehicle module, a photovoltaic module, a main control module, an AC terminal module and a main circuit conversion terminal module. Wherein,

[0006] The input end of the power grid connection control module is connected to the power grid incoming line, the output end of the power grid connection control module is connected to the input end of the main circuit conversion terminal module, and the output end of the main circuit conversion terminal module is connected to the input end of the load module.

[0007] The input end of the energy storage battery module is connected to the power grid incoming line, and the output end of the energy storage battery module is connected to the input end of the main circuit conversion terminal module.

[0008] The output end of the photovoltaic module is connected to the input end of the main circuit conversion terminal module.

[0009] The input end of the electric vehicle module is connected to the output end of the main circuit conversion terminal module, and the output end of the electric vehicle module is connected to the input end of the AC terminal module, wherein the output end of the AC terminal module is connected to the input end of the energy storage battery module and the input end of the load module.

[0010] The master control module is in communication connection with the grid connection control module, the load module, the energy storage battery module, the electric vehicle module, the photovoltaic module, the AC terminal module and the main circuit switching terminal module.

[0011] By using the above technical scheme, when the grid connection control module is in the working state, the mains is used to complete the power supply to the load module, the charging of the energy storage battery module and the charging of the electric vehicle module. When the grid connection control module is in the non-working state, the energy storage battery module, the photovoltaic module and the electric vehicle module are selected to supply power to the load module according to the pre-set rules. During the entire power supply process, the grid connection control module, the load module, the energy storage battery module, the electric vehicle module, the photovoltaic module, the AC terminal module and the main circuit switching terminal module are in communication connection with the master control module, so that the master control module can know the state and situation of these modules. In this way, instead of unidirectional flow of energy, the flow from the battery end to the load end, the flow from the electric vehicle end to the load end and the flow from the photovoltaic end to the load end are added on the basis of the flow from the mains to the load end, the battery end, the electric vehicle end, so that the consumers of electric energy can actively participate in the operation of the power grid, reducing the loss of electric energy and improving the efficiency of electricity consumption.

[0012] Preferably, the grid connection control module comprises a main live-operated miniature circuit breaker, wherein the input end of the main live-operated miniature circuit breaker is connected with single-phase alternating current, and the output end of the main live-operated miniature circuit breaker is connected with the input end of the main circuit switching terminal module.

[0013] By using the above technical scheme, the main live-operated miniature circuit breaker, a simple electrical element, is used to control the off-grid and grid-connected of the entire home energy management center at low cost and small size.

[0014] Preferably, the energy storage battery module comprises an energy storage live-operated miniature circuit breaker, a branch live-operated miniature circuit breaker, an energy storage current transformer, a storage battery and an energy storage converter; wherein,

[0015] The input end of the branch live-operated miniature circuit breaker is connected with the grid incoming line, and the output end of the branch live-operated miniature circuit breaker is connected with the AC end of the energy storage converter, and the DC end of the energy storage converter is connected with the storage battery;

[0016] The AC end of the energy storage converter is also connected with the input end of the energy storage live-operated miniature circuit breaker, and the output end of the energy storage live-operated miniature circuit breaker is connected with the input end of the main live-operated miniature circuit breaker;

[0017] The AC end of the energy storage converter is also connected with the energy storage current transformer.

[0018] By using the above technical scheme, the storage of commercial power is completed by using the electrical element when the home energy management center is connected to the grid, and the required power is provided for the user end load when the home energy management center is off-grid, so that the consumer of the electric energy, i.e. the battery, is actively involved in the operation of the power grid at low cost and small size, and the electric energy loss is reduced and the power utilization efficiency is improved.

[0019] Preferably, the system further comprises an auxiliary power supply module; wherein the input end of the auxiliary power supply module is connected to the output end of the main road adapter terminal module, and the output end of the auxiliary power supply module is connected to the main control module.

[0020] By using the above technical scheme, all modules in the entire system that require low-voltage direct current are powered by adding an auxiliary power supply module, without the need to enter multiple low-voltage direct current modules for corresponding power supply, thereby reducing the volume of the entire system.

[0021] Preferably, the AC end of the energy storage converter is further connected to the input end of the auxiliary power supply.

[0022] By using the above scheme, in the case of off-grid of the home energy management center, the battery can be used to provide single-phase alternating current for the auxiliary power supply module, reducing the situation that the auxiliary power supply module cannot work due to off-grid, so that the auxiliary power supply module can continue to supply power to all modules in the entire system that require low-voltage direct current.

[0023] Preferably, the electric vehicle model comprises a car live-operated miniature circuit breaker, an AC contactor, an AC gun line, a car adapter terminal and a car current transformer; wherein,

[0024] The input end of the car live-operated miniature circuit breaker is connected to the output end of the main road adapter terminal module, the output end of the car live-operated miniature circuit breaker is connected to the input end of the AC contactor, the output end of the AC contactor is connected to the car adapter terminal, and the input end of the AC gun line is connected to the car adapter terminal;

[0025] The input end of the AC contactor is further connected to the car current transformer, and the output end of the AC gun line is connected to the car adapter terminal.

[0026] By using the above technical scheme, the same set of electrical elements is used for the charging process of the electric vehicle and the discharging process of the electric vehicle, so that the consumer of the electric energy, i.e. the electric vehicle, is actively involved in the operation of the power grid at low cost and small size, and the electric energy loss is reduced and the power utilization efficiency is improved.

[0027] Preferably, the system further comprises a surge protection module; wherein,

[0028] The input end of the surge protection module is connected to the output end of the main circuit switching terminal module, and the main control module is further connected to the surge protection module.

[0029] By adopting the technical scheme, the surge protection module is arranged to protect the circuit from damage caused by power grid impact and transient overvoltage.

[0030] Preferably, the storage battery comprises at least two battery packs.

[0031] By adopting the technical scheme, the multiple battery packs are arranged to increase the capacity of the energy storage battery module.

[0032] Preferably, the load module comprises at least one load unit, and the load unit comprises a load, a load live operating miniature circuit breaker and a load current transformer.

[0033] The input end of the load live operating miniature circuit breaker is connected to the output end of the main circuit switching terminal module, and one branch of the output end of the load live operating miniature circuit breaker is connected to the load.

[0034] The other branch of the output end of the load live operating miniature circuit breaker is connected to the load current transformer.

[0035] By adopting the technical scheme, the load current transformer is arranged to monitor the current flowing into the load in real time and protect the load.

[0036] Preferably, the photovoltaic module comprises a photovoltaic, a photovoltaic branch switching terminal, a photovoltaic miniature circuit breaker and a photovoltaic current transformer.

[0037] The photovoltaic is connected to the input end of the photovoltaic branch switching terminal, one branch of the output end of the photovoltaic branch switching terminal is connected to the input end of the photovoltaic miniature circuit breaker, and the output end of the photovoltaic miniature circuit breaker is connected to the input end of the main circuit switching terminal module.

[0038] The other branch of the output end of the photovoltaic branch switching terminal is connected to the photovoltaic current transformer.

[0039] By adopting the technical scheme, when the off-grid condition of the home energy management center occurs and the electric quantity stored in the storage battery module cannot support the load, the photovoltaic module is formed by using electrical elements, so that the electric quantity is provided for the load at low cost and small size, and the power utilization efficiency is improved.

[0040] The home energy management system has the following beneficial effects compared with the prior art.

[0041] When the grid connection control module is in the working state, the mains is used to complete the power supply to the load module, the charging of the energy storage battery module, and the charging of the electric vehicle module. When the grid connection control module is in the non-working state, the energy storage battery module, the photovoltaic module and the electric vehicle module are selected to supply power to the load module according to the pre-set rules. Among the whole power supply process, the grid connection control module, the load module, the energy storage battery module, the electric vehicle module, the photovoltaic module and the main road switching terminal module are all in communication connection with the main control module, so as to make the main control module understand the state and situation of these modules. In this way, instead of unidirectional flow of energy, the flow from the battery end to the load end, from the electric vehicle end to the load end, from the photovoltaic end to the load end and the like is also increased, so that the consumer of electric energy can actively participate in the operation of the power grid, reducing the loss of electric energy and improving the efficiency of electricity consumption. BRIEF DESCRIPTION OF DRAWINGS

[0042] Figure 1 Fig. 1 is a schematic diagram of the connection of modules in a household energy management system provided by the embodiment of the present application.

[0043] Figure 2 Fig. 2 is a schematic diagram of the connection of the grid connection control module and the main road switching terminal module provided by the embodiment of the present application.

[0044] Figure 3 Fig. 3 is a schematic diagram of the connection of the main live operating miniature circuit breaker and the auxiliary power supply module provided by the embodiment of the present application.

[0045] Figure 4 Fig. 4 is a schematic diagram of the connection of the energy storage battery module and the main road switching terminal module provided by the embodiment of the present application.

[0046] Figure 5 Fig. 5 is a schematic diagram of the connection of the energy storage converter and the auxiliary power supply module provided by the embodiment of the present application.

[0047] Figure 6 Fig. 6 is a schematic diagram of the connection of the surge protection module and the main switching terminal module provided by the embodiment of the present application.

[0048] Figure 7 Fig. 7 is a schematic diagram of the connection of the photovoltaic module and the main switching terminal module provided by the embodiment of the present application.

[0049] Figure 8 Fig. 8 is a schematic diagram of the connection of the electric vehicle module and the main switching terminal module provided by the embodiment of the present application.

[0050] Figure 9 Fig. 9 is a schematic diagram of the connection of the load module and the main switching terminal module provided by the embodiment of the present application.

[0051] REFERENCE SIGNS:

[0052] 1, grid connection control module; 11, main live operating miniature circuit breaker; 2, load module; 21, load unit; 211, load; 212, load live operating miniature circuit breaker; 213, load current transformer; 3, energy storage battery module; 31, energy storage live operating miniature circuit breaker; 32, branch live operating miniature circuit breaker; 33, energy storage current transformer; 34, battery; 35, energy storage converter; 4, electric vehicle module; 41, vehicle live operating miniature circuit breaker; 42, AC contactor; 43, AC gun line; 44, vehicle transfer terminal; 45, vehicle current transformer; 5, photovoltaic module; 51, photovoltaic; 52, photovoltaic branch transfer terminal; 53, photovoltaic miniature circuit breaker; 54, photovoltaic current transformer; 6, master control module; 7, main circuit transfer terminal module; 71, first transfer terminal; 72, second transfer terminal; 8, AC terminal module; 9, auxiliary power supply module; 91, auxiliary miniature circuit breaker; 92, auxiliary power supply; 93, first DC transfer terminal; 94, second DC transfer terminal; 10, surge protection module; 101, surge protector; 102, surge miniature circuit breaker.

[0053] The following specific embodiments will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0054] The technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0055] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs. The terminology used in the description of the present application herein only for the purpose of describing specific embodiments of the present application, and is not intended to limit the present application.

[0056] The following will be described in conjunction with the drawings in the embodiments of the present application. Figures 1-9 The present application will be further described in detail.

[0057] The present application discloses a kind of household energy management system. Figure 1 It is a kind of household energy management system module connection schematic diagram provided in the embodiment of the present application.As shown in Figure 1, the household energy management system of the present application comprises grid connection control module 1, load module 2, energy storage battery module 3, electric vehicle module 4, photovoltaic module 5, main control module 6, main circuit transfer terminal module 7, AC terminal module 8, auxiliary power supply module 9 and surge protection module 10. Figure 1As shown, a home energy management system includes a grid connection control module 1, a load module 2, an energy storage battery module 3, an electric vehicle module 4, a photovoltaic module 5, a master control module 6, a main road adapter terminal module 7 and an AC terminal module 8. The input end IN of the grid connection control module 1 is connected to the grid incoming line, and the output end OUT of the grid connection control module 1 is connected to the input end IN of the main road adapter terminal 7, so that when the grid connection control module 1 is in working state, the grid incoming line can be transmitted to the input end IN of the main road adapter terminal 7 through the grid connection control module 1, so that the main road adapter terminal 7 receives the power supply. The output end OUT of the main road adapter terminal 7 is connected to the input end of the load module 2, so that after the main road adapter terminal 7 receives the power supply, it is transmitted to the load module 2 to complete the power supply work of the load module 2 and the electric vehicle module 4.

[0058] The input end IN of the energy storage battery module 3 is also connected to the grid incoming line, so that the energy storage module 3 and the grid connection control module 1 are in two branches of the grid incoming line. When the grid connection control module 1 is in working state, the energy storage battery module 3 is also in charging state, that is, the energy storage battery module 3 receives the power supply of the grid and stores it. The output end OUT of the energy storage battery module 3 is connected to the input end IN of the main road adapter terminal 7, and when the grid connection control module 1 is in non-working state, the energy storage battery module 3 is in discharging state, that is, the energy storage battery module 3 transmits the stored electric energy to the input end IN of the main road adapter terminal 7 through its output end OUT, so that the main road adapter terminal 7 transmits to the load module 2 and the electric vehicle module 4 through its output end.

[0059] The output end OUT of the photovoltaic module 5 is connected to the input end IN of the main road adapter terminal 7, and when the energy storage battery module 3 does not have enough power to supply, the photovoltaic module 5 starts to work, so that the output end OUT of the photovoltaic module 5 outputs single-phase alternating current, and the output end OUT of the photovoltaic module 4 is connected to the input end IN of the main road adapter terminal 7, so that the input end of the main road adapter terminal 7 receives single-phase alternating current, so that the main road adapter terminal 7 transmits to the load module 2 through its output end, and completes the power supply work of the load module 2 and the electric vehicle module 4.

[0060] The input end IN of the electric vehicle module 4 is connected to the output end OUT of the main road adapter terminal 7, so that the main road adapter terminal receives single-phase alternating current and can supply power to the electric vehicle module 4. The output end OUT of the electric vehicle module 4 is connected to the input end IN of the AC terminal module 8, and the output end OUT of the AC terminal module 8 is connected to the input end IN of the energy storage battery module 3 and the input end IN of the load module 2, so that when the energy storage battery module 3 and the photovoltaic module 5 cannot provide single-phase alternating current, the single-phase alternating current is released through the electric vehicle module 4 and transmitted to the output end of the AC terminal module 8, so as to supply power to the load module 2 and the energy storage battery module 3.

[0061] The master control module 6 is in communication connection with the grid connection module 1, the load module 2, the energy storage battery module 3, the electric vehicle module 4, the photovoltaic module 5 and the main circuit switching terminal module 7, so that the master control module 6 can learn the dynamic state of these modules in real time.

[0062] When the grid connection module 1 is in working state, the mains is used to complete the power supply to the load module 2, the charging of the energy storage battery module 3 and the charging of the electric vehicle module 4. When the grid connection control module 1 is in non-working state, the energy storage battery module 3, the photovoltaic module 5 and the electric vehicle module 4 are selected to supply power to the load module 2 according to the pre-set rules. During the entire power supply process, the grid connection control module 1, the load module 2, the energy storage battery module 3, the electric vehicle module 4, the photovoltaic module 5 and the main circuit switching terminal module 7 and the AC terminal module 8 are in communication connection with the master control module 6, so that the master control module 6 can learn the state and situation of these modules. In this way, the energy flow is no longer unidirectional, but also includes the flow from the battery end to the load end, the flow from the electric vehicle end to the load end and the flow from the photovoltaic end to the load end, so that the consumers of the electric energy can actively participate in the operation of the power grid, reducing the loss of electric energy and improving the efficiency of electricity consumption.

[0063] Figure 2 is a connection diagram of the grid connection control module and the main circuit switching terminal module provided by the embodiment of the application. As shown in Figure 2 The grid connection control module 1 includes a main live-operated miniature circuit breaker 11, and the main circuit switching terminal module 7 includes a first switching terminal 71 and a second switching terminal 72. The input end IN of the main live-operated miniature circuit breaker 11 is connected to the single-phase alternating current transmitted by the grid, and the output end OUT of the main live-operated miniature circuit breaker 11 has two ports, one of which is connected to the input end IN of the first switching terminal 71, and the other of which is connected to the input end IN of the second switching terminal 72, so that the output end OUT of the main live-operated miniature circuit breaker 11 is connected to the input end IN of the main circuit switching terminal module 7.

[0064] The power grid incoming line is branched into two branches by the switching terminal, the first branch is connected to the input end of the main live-operated miniature circuit breaker 11, the main live-operated miniature circuit breaker 11 controls the off-grid and grid-connected of the whole home energy management system, and has two outputs, one feedback signal is connected to the main control module 6, which controls and detects the opening and closing of the main live-operated miniature circuit breaker 11 in real time, and provides a safe and stable input power supply for the home energy management system. The output end OUT of the main live-operated miniature circuit breaker 11 has two, one is connected to the input end IN of the first switching terminal 71, and the other is connected to the input end IN of the second switching terminal 72, the first switching terminal 71 and the second switching terminal 72 are both a 220V switching terminal of one switching six type. The six ports of the output end OUT of the first switching terminal 71 are P1, P2, P3, P4, P5 and P6, and the six ports of the output end OUT of the second switching terminal 72 are P1, P2, P3, P4, P5 and P6.

[0065] The home energy management system further comprises an auxiliary power supply module 9. Figure 3 is the connection schematic diagram of the main live-operated miniature circuit breaker and the auxiliary power supply module provided by the embodiment of the present application. As shown in Figure 3 the auxiliary power supply module 9 comprises an auxiliary miniature circuit breaker 91, an auxiliary power supply 92, a first DC switching terminal 93 and a second DC switching terminal 94. The input end IN of the auxiliary miniature circuit breaker 91 has two input ports QF2-1 and QF2-3, the QF2-1 input port is connected with P1 of the output end OUT of the first switching terminal 71, and the QF2-3 input port is connected with P1 of the output end OUT of the second switching terminal 72, so as to complete the connection of the input end of the auxiliary power supply module 9 with the output end of the main switching terminal module 7. The output end OUT of the auxiliary miniature circuit breaker 91 has two output ports QF2-2 and QF2-4, the input end IN of the auxiliary power supply 92 has two input ports L and N, the QF2-2 output port is connected with the L input port of the auxiliary power supply 92, and the QF2-4 output port is connected with the N input port of the auxiliary power supply 92. The output end OUT of the auxiliary power supply 92 has two output ports V+ and V-, the V+ output port is connected with the first DC switching terminal 93, and the V- output port is connected with the second DC switching terminal 94. So that the output ends of the first DC switching terminal 93 and the second DC switching terminal 94 are connected with the main control module 6, so as to complete the connection of the output end of the auxiliary power supply module 9 with the main control module 6.

[0066] In the case that the main live-operated miniature circuit breaker 11 is closed, that is, the home energy management system is grid-connected, the first DC switching terminal 93 and the second DC switching terminal 94 supply power to the main control module 6 of the home energy management center.

[0067] Figure 4Figure 1 is a schematic diagram of the connection between the energy storage battery module and the main circuit switching terminal module provided by the embodiment of the present application. As shown in Figure 1, the energy storage battery module 3 comprises an energy storage live-operated miniature circuit breaker 31, a branch live-operated miniature circuit breaker 32, an energy storage current transformer 33, a storage battery 34 and an energy storage converter 35. The input end IN of the branch live-operated miniature circuit breaker 32 has two ports QF1-1 and QF1-3, and the QF1-1 port and the QF1-3 port are connected to the network point incoming line to complete the connection of the input end of the branch live-operated miniature circuit breaker 32 to the network incoming line. The output end OUT of the branch live-operated miniature circuit breaker 32 has two ports QF1-2 and QF1-4, and the AC side of the energy storage converter 35 has two input ports L and N. By connecting the QF1-2 port to the L port and the QF1-4 port to the N port, the output end of the branch live-operated miniature circuit breaker 32 is connected to the AC end of the energy storage converter 35. The DC end of the energy storage converter 35 further comprises two ports + and -, which are connected to the storage battery 34 to complete the connection of the DC end of the energy storage converter 35 to the storage battery 34. Figure 4

[0068] The branch live-operated miniature circuit breaker 32 is a circuit breaker switch for controlling the charging of the network to the storage battery 34, and its output ports QF1-2 and QF1-4 are connected to the L port and the N port of the AC side input end of the energy storage converter 35. The energy storage converter 35 converts the AC power in the network into DC power through its internal rectifier circuit to charge the storage battery 34. The storage battery 34 comprises at least two battery packs. The two battery packs are connected in parallel with the positive pole to the positive pole and the negative pole to the negative pole. In this way, when the network is connected, the branch live-operated miniature circuit breaker 32 is in a closed state, and the storage battery 34 is charged through the energy storage converter 35, so that the energy storage battery module 3 works in a charging state.

[0069] The AC side of the energy storage converter 35 further comprises two output ports OUT-L and OUT-N, the input end of the energy storage live-operated miniature circuit breaker 31 has two ports QF4-1 and QF4-3, and the output end of the energy storage live-operated miniature circuit breaker 31 has two ports QF4-2 and QF4-4. By connecting the OUT-L port to the QF4-1 port and the OUT-N port to the QF4-3 port, the AC end of the energy storage converter 35 is connected to the input end of the energy storage live-operated miniature circuit breaker 31. By connecting the QF4-2 port to the first switching terminal 71 and the QF4-4 port to the second switching terminal 72, the output end of the energy storage live-operated miniature circuit breaker 31 is connected to the input end of the main live-operated miniature circuit breaker 11.

[0070] ​In addition, the input end of the energy storage current transformer 33 has two ports L1A and L1B, the OUT-L port is connected with L1A, and the OUT-N port is connected with L1B, so as to complete the connection of the AC end of the energy storage converter 35 with the energy storage current transformer.

[0071] When the main live-operated miniature circuit breaker 11 is disconnected, the first switching terminal 71 and the second switching terminal 72 will lose the power supply capability, the home energy management system stops running, and the branch live-operated miniature circuit breaker 32 is disconnected, so that the power grid no longer charges the storage battery 34 through the energy storage converter 35. At this time, the energy stored in the storage battery 34 is transmitted to the energy storage converter 35 through the output port, and the DC power is converted into AC power through the inverter function of the energy storage converter 35, which is transmitted to the input end of the energy storage live-operated miniature circuit breaker 31 through the output ports OUT-N and OUT-L, and finally to the first switching terminal 71 and the second switching terminal 72, so that the first switching terminal 71 and the second switching terminal 72 restore the power supply capability. On the other hand, it is transmitted to the energy storage current transformer 33, so that the energy storage current transformer 33 can monitor and measure the input and output currents of the energy storage converter 35 in real time, and protect the energy storage battery module 3.

[0072] Figure 5 is a connection diagram of the energy storage converter and the auxiliary power supply module provided by the embodiment of the present application. As shown in Figure 5 The AC end of the energy storage converter 35 is also connected with the input end of the auxiliary power supply 92, so as to complete the connection of the AC end of the energy storage converter 35 with the auxiliary power supply module 9. In this way, when the off-grid condition occurs, the AC power provided by the energy storage battery module 3 can also be provided to the auxiliary power supply module 9, so that the auxiliary power supply 92 can work, thereby enabling the auxiliary power supply module 9 to continue to supply power to all modules requiring low-voltage DC power in the entire system.

[0073] The home energy management system further comprises a surge protection module 10. Figure 6 is a connection diagram of the surge protection module and the main switching terminal module provided by the embodiment of the present application. As shown in Figure 6As shown, the surge protection module 10 includes a surge protector 101 and a surge miniature circuit breaker 102. The surge protector 101 has two input ports of SPD-L and SPD-N, the input of the surge miniature circuit breaker 102 has two ports of QF3-1 and QF3-3, and the output of the surge miniature circuit breaker 102 has two ports of QF3-2 and QF3-4. The output P3 of the first transfer terminal 71 in the main circuit transfer terminal module 7 is connected with the QF3-1 port, the output P3 of the second transfer terminal 72 in the main circuit transfer terminal module 7 is connected with the QF3-3 port, the QF3-2 port is connected with the SPD-L port, and the QF3-4 port is connected with the SPD-N port, so as to complete the connection between the input of the surge protection module 10 and the output of the main circuit transfer terminal module 7. By setting the surge protection module 10, the damage of the circuit in the system caused by the impact of the power grid and the transient overvoltage can be protected.

[0074] Figure 7 Figure 1 is a schematic diagram of the connection between the photovoltaic module and the main transfer terminal module provided by the embodiment of the present application. As shown in Figure 1, Figure 7 As shown, the photovoltaic module 5 includes a photovoltaic 51, a photovoltaic branch transfer terminal 52, a photovoltaic miniature circuit breaker 53, and a photovoltaic current transformer 54.

[0075] The output of the photovoltaic 51 has two ports of L port and N port, the input of the photovoltaic branch transfer terminal 52 has two ports of 2XT-2 port and 2XT-4 port, and the output of the photovoltaic branch transfer terminal 52 has two ports of 2XT-1 port and 2XT-3 port. By connecting the L port with the 2XT-2 port and connecting the N port with the 2XT-4 port, the photovoltaic 51 is connected with the input of the photovoltaic branch transfer terminal 52. The input of the photovoltaic miniature circuit breaker 53 has two ports of QF6-2 port and QF6-4 port, and the output of the photovoltaic miniature circuit breaker 53 has two ports of QF6-1 port and QF6-3 port. By connecting the 2XT-1 port with the QF6-2 port and connecting the 2XT-3 port with the QF6-4 port, the output of the photovoltaic branch transfer terminal 52 is connected with one branch of the input of the photovoltaic miniature circuit breaker 53. By connecting the QF6-1 port with the input of the first transfer terminal 71 and connecting the QF6-3 port with the input of the second transfer terminal 72, the output of the photovoltaic miniature circuit breaker 53 is connected with the input of the main circuit transfer terminal.

[0076] In addition, the input of the photovoltaic current transformer 54 has two ports of L3A and L3B, the 2XT-1 port is connected with L3A, and the 2XT-3 port is connected with L3B, so that the other branch of the output of the photovoltaic branch transfer terminal 52 is connected with the photovoltaic current transformer 54.

[0077] When the energy storage battery module 3 releases electrical energy below a certain threshold, it will no longer provide AC power. At this time, the photovoltaic module 5 will operate, closing the photovoltaic miniature circuit breaker 53. The power supplied by photovoltaic module 51, photovoltaic L and photovoltaic N, will be connected to ports 2XT-2 and 2XT-4 of the photovoltaic branch adapter terminal 52. Through ports 2XT-1 and 2XT-3 of the output terminal of the photovoltaic branch adapter terminal 52, the power will be transferred to the input terminal of the photovoltaic miniature circuit breaker 53 and the input terminal of the photovoltaic current transformer 54, so that the input terminals of the first adapter terminal 71 and the second adapter terminal 72 will receive the power, thereby providing power to the load module 2. Moreover, the photovoltaic current transformer 54 can also monitor and measure the current value in the photovoltaic module 5 in real time and provide protection for the photovoltaic module 5.

[0078] Figure 8 This is a connection diagram of the electric vehicle module and the main adapter terminal module provided in an embodiment of this application. Figure 8 As shown, the electric vehicle module 4 includes a vehicle-operated miniature circuit breaker 41, an AC contactor 42, an AC cable 43, a vehicle adapter terminal 44, and a vehicle current transformer 45. The vehicle-operated miniature circuit breaker 41 has two input ports, QF5-1 and QF5-3, and two output ports, QF5-2 and QF5-4. By connecting the QF5-1 port to the P5 port of the first adapter terminal 71 and the QF5-3 port to the P5 port of the second adapter terminal 72, the input of the vehicle-operated miniature circuit breaker 41 is connected to the output of the main line adapter terminal module 1.

[0079] The AC contactor 42 has two input ports, KM-1 and KM-3, and two output ports, KM-2 and KM-4. By connecting the QF5-2 port to the KM-1 port and the QF5-4 port to the KM-3 port, the output of the automotive energized miniature circuit breaker 41 is connected to the input of the AC contactor 42.

[0080] By connecting the KM-2 and KM-4 ports to the input terminals of the automotive adapter terminal 44, the output terminal of the AC contactor 42 is connected to the automotive adapter terminal 44. The output terminal of the automotive adapter terminal 44 is also connected to the input terminal of the AC power line 43, completing the AC power line connection.

[0081] In addition, the automotive current transformer 45 has L2A and L2B input terminals. Connecting the KM-1 port to the L2A port and the KM-3 port to the L2B port allows the input terminal of the AC contactor 42 to also be connected to the automotive current transformer 45. The output terminal of the AC connector 43 is also connected to the output terminal of the automotive adapter terminal 44.

[0082] When the home energy management system is connected to the grid, the P5 port of the output end of the first adapter terminal 71 and the P5 port of the output end of the second adapter terminal 72 are connected to the input ends QF5-1 and QF5-3 of the automobile live-operated miniature circuit breaker 41, wherein the automobile live-operated miniature circuit breaker 41 has a residual current action protection function. The output ends QF5-2 and QF5-4 of the automobile live-operated miniature circuit breaker 41 are connected to the input ends KM-1 and KM-3 of the alternating current contactor 42, the output ends KM-2 and KM-4 of the alternating current contactor 42 are connected to the input ends of the automobile adapter terminal 44, 220V alternating current is transmitted to the alternating current gun wire 43 through the adapter of the automobile adapter terminal 44 and is output to the electric vehicle, thereby realizing the charging of the electric vehicle.

[0083] When the home energy management system is off-grid, and the energy storage battery module 3 and the photovoltaic module 5 cannot provide alternating current, the alternating current gun wire 43 transmits the electric energy in the electric vehicle to the output end of the automobile adapter terminal 44, and then the automobile adapter terminal 44 is connected to the output ends KM-2 and KM-4 of the alternating current contactor 42. Then it is divided into two branches, one branch is connected to the L2A port and the L2B port of the automobile current transformer 45 through the KM-1 port and the KM-3 port of the alternating current contactor 42, so that the automobile current transformer 45 can monitor and measure the current value in the electric vehicle module 4 in real time, thereby protecting the electric vehicle module. The other branch transmits the electric energy to the QF5-2 port and the QF5-4 port of the automobile live-operated miniature circuit breaker 41 through the KM-1 port and the KM-3 port of the alternating current contactor 42, and then the QF5-1 port and the QF5-3 port of the automobile live-operated miniature circuit breaker 41 are connected to the alternating current terminal module 8, thereby transmitting the electric energy to the alternating current terminal module 8. The output end of the alternating current terminal module 8 is connected to the input end of the load module 2, the input end of the auxiliary power supply module 9, and the input end of the surge protection module 10, thereby supplying power to the load module 2, the auxiliary power supply module 9, and the surge protection module 10, so that the home energy management system has a stable power supply to start working. Until the stored electric energy in the electric vehicle is consumed to a specified limit value, the electric vehicle stops supplying power. In this way, the same set of electrical elements is used for the charging process of the electric vehicle and the discharging process of the electric vehicle, thereby actively involving the consumer of electric energy, i.e., the electric vehicle, in the operation of the grid at low cost and small size, reducing electric energy loss and improving power utilization efficiency.

[0084] Figure 9 Fig. 6 is a schematic diagram of the connection between the load module and the main adapter terminal module provided in the embodiment of the present application. As shown in Fig. 6, the output end of the load module 2 is connected to the input end of the main adapter terminal module 7, and the input end of the main adapter terminal module 7 is connected to the output end of the alternating current terminal module 8. Figure 9As shown, the load module 2 comprises at least one load unit 21, and the load unit 21 comprises a load 211, a load-operated miniature circuit breaker 212 and a load current transformer 213. The input end of each load-operated miniature circuit breaker 212 is provided with two ports, i.e., a QFX-1 port and a QFX-3 port, and the output end of each load-operated miniature circuit breaker 212 is provided with two ports, i.e., a QFX-2 port and a QFX-4 port. The QFX-1 port of each load-operated miniature circuit breaker 212 is connected to a P port of the output end of the first switching terminal 71, and the QFX-2 port of each load-operated miniature circuit breaker 212 is connected to a P port of the output end of the second switching terminal 72. The QFX-1 port and the QFX-2 port of the same load-operated miniature circuit breaker 212 are connected to the P ports with the same number, so that the input end of the load-operated miniature circuit breaker 212 is connected to the output end of the main circuit switching terminal 11. The X in QFX-1, QFX-2, QFX-3 and QFX-4 represents a value, and the values of X in different load units 21 are different.

[0085] The QFX-2 port and the QFX-4 port of each load-operated miniature circuit breaker 212 are connected to the input end of the corresponding load 211, so that the output end of the load-operated miniature circuit breaker 212 is connected to the load 211 through one branch.

[0086] In addition, the input end of each load current transformer 213 is provided with an LXA port and an LXB port. The QFX-2 port of each load-operated miniature circuit breaker 212 is connected to the LXA port belonging to the same load unit 21, and the QFX-4 port of each load-operated miniature circuit breaker 212 is connected to the LXB port belonging to the same load unit 21, so that the other branch of the output end of the load-operated miniature circuit breaker 212 is connected to the load current transformer 213. Each load unit 21 has a preset priority, and in the case of grid connection of the home energy management system, each load unit 21 can be powered. In the case of off-grid of the home energy management system, the load units 21 with higher priorities can be powered in priority according to the preset priorities. The load current transformer 213 is arranged to monitor the current flowing into the load in real time and protect the load 211.

[0087] The implementation principle is as follows:

[0088] The grid connection control module 1 controls the off-grid and on-grid of the home energy management system. When the grid connection control module 1 works, the home energy management system is in the on-grid state, at this time, the storage battery module 3 is charged by the power grid, the load module 2 is powered, and the auxiliary power module 9 is powered. When the grid connection control module 2 does not work, the home energy management system is in the off-grid state, at this time, the storage battery module 3 is disconnected, the branch battery module 2 is connected, the auxiliary power module 9 and the load module are connected, the load and the auxiliary power are powered by the battery. Then when the battery power reaches the critical value, the branch battery module 2 is disconnected, the photovoltaic module 5 is connected, the load and the auxiliary power are powered by the photovoltaic. Finally, when the photovoltaic power reaches the critical value, the photovoltaic module 5 is disconnected, the electric vehicle module 5 is connected, the load and the auxiliary power are powered by the electric vehicle module 5. Until the electric vehicle stops supplying power to the home energy management system, the electric vehicle stops supplying power to the home energy management system.

[0089] The technical features of the above embodiments can be combined in any manner. To make the description concise, not all possible combinations of the technical features in the above embodiments are described, but as long as the combinations of the technical features do not exist contradictions, they should be considered as the scope of the present application.

[0090] The above embodiments only express several implementation manners of the present application, and the description is specific and detailed, but it should not be understood as a limitation on the scope of the new patent. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are all within the scope of the present application. Therefore, the scope of the present application patent should be subject to the appended claims.

Claims

1. A home energy management system, characterized by, The system comprises a grid connection control module (1), a load module (2), an energy storage battery module (3), an electric vehicle module (4), a photovoltaic module (5), a main control module (6), an AC terminal module (8) and a main path switching terminal module (7), wherein, The input end of the grid connection control module (1) is connected with a grid incoming line, and the output end of the grid connection control module (1) is connected with the input end of the main path switching terminal module (7), and the output end of the main path switching terminal module (7) is connected with the input end of the load module (2); The input end of the energy storage battery module (3) is connected with a grid incoming line, and the output end of the energy storage battery module (3) is connected with the input end of the main path switching terminal module (7); The output end of the photovoltaic module (5) is connected with the input end of the main path switching terminal module (7); The input end of the electric vehicle module (4) is connected with the output end of the main path switching terminal module (7), and the output end of the electric vehicle module (4) is connected with the input end of the AC terminal module (8), wherein the output end of the AC terminal module (8) is connected with the input end of the energy storage battery module (3) and the input end of the load module (2); The main control module (6) is in communication connection with the grid connection control module (1), the load module (2), the energy storage battery module (3), the electric vehicle module (4), the photovoltaic module (5), the AC terminal module (8) and the main path switching terminal module (7).

2. The system of claim 1, wherein, The grid connection control module (1) comprises a main live-operated miniature circuit breaker (11), wherein the input end of the main live-operated miniature circuit breaker (11) is connected with single-phase AC power, and the output end of the main live-operated miniature circuit breaker (11) is connected with the input end of the main path switching terminal module (7).

3. The system of claim 2, wherein, The energy storage battery module (3) comprises an energy storage live-operated miniature circuit breaker (31), a branch live-operated miniature circuit breaker (32), an energy storage current transformer (33), a storage battery (34) and an energy storage converter (35), wherein, The input end of the branch live-operated miniature circuit breaker (32) is connected with a grid incoming line, the output end of the branch live-operated miniature circuit breaker (32) is connected with the AC end of the energy storage converter (35), and the DC end of the energy storage converter (35) is connected with the storage battery (34); The AC end of the energy storage converter (35) is also connected with the input end of the energy storage live-operated miniature circuit breaker (31), and the output end of the energy storage live-operated miniature circuit breaker (31) is connected with the input end of the main live-operated miniature circuit breaker (11); The AC end of the energy storage converter (35) is also connected with the energy storage current transformer (33).

4. The system of claim 3, wherein, The system further comprises an auxiliary power supply module (9), wherein, The input end of the auxiliary power supply module (9) is connected with the output end of the main path switching terminal module (7), and the output end of the auxiliary power supply module (9) is connected with the main control module (6).

5. The system of claim 4, wherein, The AC end of the energy storage converter (35) is also connected with the input end of the auxiliary power supply module (9).

6. The system of claim 1, wherein, The electric vehicle module (4) comprises a vehicle live operating miniature circuit breaker (41), an alternating current contactor (42), an alternating current gun line (43), a vehicle transfer terminal (44) and a vehicle current transformer (45); wherein, The input end of the vehicle live operating miniature circuit breaker (41) is connected to the output end of the main circuit transfer terminal module (7), the output end of the vehicle live operating miniature circuit breaker (41) is connected to the input end of the alternating current contactor (42), the output end of the alternating current contactor (42) is connected to the vehicle transfer terminal (44), and the input end of the alternating current gun line (43) is connected to the vehicle transfer terminal (44); The input end of the alternating current contactor (42) is also connected to the vehicle current transformer (45), and the output end of the alternating current gun line (43) is connected to the vehicle transfer terminal (44).

7. The system of claim 1, wherein, The system further comprises a surge protection module (10); wherein, The input end of the surge protection module (10) is connected to the output end of the main circuit transfer terminal module (7), and the main control module (6) is also connected to the surge protection module (10).

8. The system of claim 3, wherein, The storage battery (34) comprises at least two battery packs.

9. The system of claim 1, wherein, The load module (2) comprises at least one load unit (21), and the load unit comprises a load (211), a load live operating miniature circuit breaker (212) and a load current transformer (213); wherein, The input end of the load live operating miniature circuit breaker (212) is connected to the output end of the main circuit transfer terminal module (7), and one branch of the output end of the load live operating miniature circuit breaker (212) is connected to the load (211); The other branch of the output end of the load live operating miniature circuit breaker (212) is connected to the load current transformer (213).

10. The system of claim 1, wherein, The photovoltaic module (5) comprises a photovoltaic (51), a photovoltaic branch transfer terminal (52), a photovoltaic miniature circuit breaker (53) and a photovoltaic current transformer (54); wherein, The photovoltaic (51) is connected to the input end of the photovoltaic branch transfer terminal (52), one branch of the output end of the photovoltaic branch transfer terminal (52) is connected to the input end of the photovoltaic miniature circuit breaker (53), and the output end of the photovoltaic miniature circuit breaker (53) is connected to the input end of the main circuit transfer terminal module (7); The other branch of the output end of the photovoltaic branch transfer terminal (52) is connected to the photovoltaic current transformer (54).

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