Household intelligent energy storage system

Abstract

The invention discloses a household intelligent energy storage system. The household intelligent energy storage system comprises a plurality of energy storage modules, a socket and a control module. Each energy storage module comprises a battery pack and a bidirectional converter; each energy storage module comprises a socket interface; the socket comprises an input end and an output end, the input end is connected with at least one socket interface, and the output end is electrically connected with a load; the control module is electrically connected with the energy storage module; and the control module is used for acquiring the required power of the load and regulating the number of the energy storage modules put into operation according to the required power. According to the technical scheme provided by the invention, the load adaptation flexibility of the household energy storage system can be improved, a household line does not need to be greatly transformed, and the use reliability of the household intelligent energy storage system is improved.

Description

Technical Field

[0001] This invention relates to the field of energy storage technology, and in particular to a smart home energy storage system. Background Technology

[0002] Traditional home energy storage devices have limited output power per socket, making it impossible to power multiple high-power appliances simultaneously. Home energy storage devices typically receive electrical energy from the grid, converting the AC power to DC power and storing it in the device. During grid outages or off-peak hours, the stored energy can be converted back to AC power to supply the loads. However, energy storage devices are bulky, expensive, and experience energy losses during the conversion process.

[0003] To power multiple appliances, multiple sockets are usually connected in parallel. Problems such as asynchronous voltage phases and uneven current distribution among the sockets can lead to short circuits, overloads, or thermal runaway. Summary of the Invention

[0004] This invention provides a home intelligent energy storage system that improves the load adaptability and reliability of home intelligent energy storage systems.

[0005] In a first aspect, the present invention provides a home intelligent energy storage system, comprising:

[0006] Multiple energy storage modules, each energy storage module including a battery pack and a bidirectional converter; each energy storage module including a socket interface;

[0007] A socket includes an input terminal and an output terminal, wherein the input terminal is connected to at least one of the socket interfaces, and the output terminal is electrically connected to a load;

[0008] A control module is electrically connected to the energy storage module; the control module is used to obtain the power demand of the load and adjust the number of energy storage modules put into operation according to the power demand.

[0009] Optionally, the rated power provided by the energy storage module is P1, and the power demand of the load is P2;

[0010] When P2≤P1, the control module is used to control one of the energy storage modules to be electrically connected to the socket;

[0011] When P1 < P2 ≤ n × P1, the control module is used to control n energy storage modules to be connected in parallel with the socket;

[0012] Where n≥2, n∈N.

[0013] Optionally, the energy storage module further includes a temperature sensor, which is used to obtain the current temperature of the battery pack;

[0014] The control module is electrically connected to the temperature sensor, and the control module is also used to reduce the output power of the energy storage module when the difference between the current temperature and the preset temperature is within a first range.

[0015] Optionally, the control module is further configured to: perform an alarm operation when the difference between the current temperature and the preset temperature is within a second range; and disconnect the connection between the energy storage module and the socket when the difference between the current temperature and the preset temperature is within a third range.

[0016] The third range is larger than the second range, and the second range is larger than the first range.

[0017] Optionally, each of the energy storage modules is hot-swappable to the socket.

[0018] Optional, home smart energy storage systems also include:

[0019] The rectifier module is electrically connected to both the bidirectional converter and the socket; the rectifier module is used to output a DC signal to the socket.

[0020] Optionally, the control module includes a phase synchronization unit, used to control the output phase of the energy storage module according to the required phase of the load.

[0021] Optionally, the control module further includes a current distribution unit, used to determine the output current of each energy storage module according to the power demand of the load.

[0022] Optionally, the current distribution unit includes a PID calculation subunit, which is used to calculate the output current of each energy storage module based on the demand current corresponding to the demand power.

[0023] Optionally, the socket may include multiple output terminals.

[0024] The technical solution provided by this invention involves setting up multiple energy storage modules, the number of which can be controlled by a control module. In this way, the control module can adjust the number of energy storage modules in operation according to the power demand of the load, ensuring that the power supplied by the home energy storage system to the socket meets the load's operational needs. This improves the load's operational reliability and the adaptability of the home energy storage system, eliminating the need for significant modifications to the home's wiring and enhancing the overall reliability of the smart home energy storage system. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a home intelligent energy storage system provided in an embodiment of the present invention;

[0026] Figure 2 This is a schematic diagram of another home intelligent energy storage system provided in an embodiment of the present invention;

[0027] Figure 3 This is a schematic diagram of the structure of another home intelligent energy storage system provided in an embodiment of the present invention;

[0028] Figure 4 This is a schematic diagram of the structure of a socket provided in an embodiment of the present invention;

[0029] Figure 5 This is a schematic diagram of another home intelligent energy storage system provided in an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of a home intelligent energy storage system provided in an embodiment of the present invention. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0032] Figure 1 This is a schematic diagram of a home intelligent energy storage system provided in an embodiment of the present invention, as shown below. Figure 1 As shown, the home smart energy storage system includes: multiple energy storage modules 10, sockets 20, and a control module 30. Each energy storage module 10 includes a battery pack 11 and a bidirectional inverter 12; each energy storage module 10 includes a socket interface. The socket 20 includes an input terminal and an output terminal, with the input terminal connected to at least one socket interface and the output terminal electrically connected to the load. The control module 30 is electrically connected to the energy storage modules 10; the control module 30 is used to obtain the power demand of the load and adjust the number of energy storage modules 10 in operation according to the power demand.

[0033] The battery pack 11 includes a battery module formed by multiple lithium-ion cells connected in series and / or in parallel, and is used to store electrical energy. The bidirectional converter 12 is a power electronic device that can convert alternating current (AC) to direct current (DC) and vice versa. Loads include electrical appliances such as refrigerators, washing machines, air conditioners, or induction cookers.

[0034] It should be noted that a smart meter can also be installed between the energy storage module 10 and the socket 20. After a load is connected to the socket 20, the smart meter can measure the total power consumption of the socket in real time, which is also the power demand of the load. The control module 30 can communicate with the smart meter to obtain the power demand of the load.

[0035] Specifically, when the loads connected to the socket 20 are different, their power requirements also differ. The control module can determine the number of energy storage modules 10 to be put into operation based on the relationship between the power requirement of the currently connected load and the rated power of each energy storage module 10. In an optional embodiment, all energy storage modules 10 can be controlled to be put into operation, that is, each energy storage module 10 provides power to the socket 20. In this case, if the ratio of the power requirement of the load to the rated power provided by a single energy storage module 10 is less than 1, the control module 20 controls any one of the multiple energy storage modules 10 to be put into operation; if the ratio of the power requirement of the load to the rated power provided by a single energy storage module 10 is m, the control module 20 controls m energy storage modules 10 to be put into operation. Other methods can also be used to adjust the number of energy storage modules 10 in operation according to the power requirement, which can be set according to actual needs and are not specifically limited here.

[0036] A switch can be installed between the energy storage module 10 and the socket 20. The control module 20 can control the on / off state of the switch to control whether the energy storage module 10 connected to the switch is put into operation or disconnected, thereby controlling the number of energy storage modules 10 in operation. The control module 20 can also control the number of energy storage modules 10 in operation in other ways, which are not specifically limited here.

[0037] The technical solution of this invention, by setting up multiple energy storage modules, allows the number of energy storage modules in operation to be controlled by a control module. In this way, the control module can adjust the number of energy storage modules in operation according to the power demand of the load, ensuring that the power currently supplied to the socket by the home energy storage system meets the load's operational needs. This improves the load's operational reliability and the adaptability of the home energy storage system, eliminating the need for significant modifications to the home's wiring and enhancing the overall reliability of the home smart energy storage system.

[0038] Optional, see reference Figure 1 The rated power provided by the energy storage module 10 is P1, and the power demand of the load is P2. When P2≤P1, the control module 30 is used to control one energy storage module 10 to be electrically connected to the socket 20. When P1<P2≤n×P1, the control module 30 is used to control n energy storage modules 10 to be connected in parallel with the socket 20. Where n≥2, n∈N.

[0039] The rated power P1 provided by the energy storage module 10 represents the maximum power that the energy storage module 10 can continuously output under standard operating conditions (rated voltage and rated current).

[0040] Specifically, if the load's required power P2 is less than or equal to the rated power P1 of the energy storage module 10, then the power provided by one energy storage module 10 can meet the load's operating requirements. In this case, any one of the multiple energy storage modules 10 can be electrically connected to the socket 20 so that the power provided by that energy storage module 10 can be supplied to the load through the socket 20. This also reduces the number of energy storage modules 10 in operation, thus reducing power loss. When the load's required power P2 is greater than the rated power P1 of the energy storage module 10, but less than or equal to n×P2, it indicates that the load's required power is large, requiring n energy storage modules 10 to provide power simultaneously. In this case, n energy storage modules 10 can be connected in parallel with the socket 20. After the n energy storage modules 10 are connected in parallel with the socket 20, the output power provided by the energy storage modules 10 can meet the load's operating requirements, improving the adaptability of the home smart energy storage system to loads with different power requirements, and enhancing the power supply reliability and stability of the home smart energy storage system.

[0041] In an optional embodiment, if the control module 20 continuously detects that the load's required power P2 is less than or equal to the rated power P1 of the energy storage module 10, the multiple energy storage modules can be numbered and the energy storage modules 10 put into operation can be replaced in sequence to keep the working time of each energy storage module 10 consistent, avoid the situation where a certain energy storage module 10 is continuously used for power supply, which may lead to abnormal operation of that energy storage module 10, and improve the service life of each energy storage module 10.

[0042] Optional, Figure 2 This is a schematic diagram of another home intelligent energy storage system provided in an embodiment of the present invention, as shown below. Figure 2 As shown, the energy storage module 10 also includes a temperature sensor 13, which is used to obtain the current temperature of the battery pack 11; the control module 30 is electrically connected to the temperature sensor 13, and the control module 30 is also used to reduce the output power of the energy storage module 10 within a first range of the difference between the current temperature and the preset temperature.

[0043] The temperature sensor 13 includes a thermocouple temperature sensor, a thermistor sensor, or an infrared temperature sensor, etc., which can be set according to actual needs and is not specifically limited here. The first range can be a fixed value or a non-fixed value. The first range is related to the type and heat resistance of the battery pack 11, and can be set according to actual needs. In an optional embodiment, the preset temperature is 40°C and the first range is 3°C to 5°C, but it can also be other values, which are not specifically limited here.

[0044] Specifically, the temperature sensor 13 can be attached inside the battery pack 11. One or more temperature sensors 13 can be installed in a battery pack 11. When a battery pack 11 has one temperature sensor 13, the temperature value measured by that temperature sensor 13 is the current temperature of the battery pack 11. When a battery pack 11 has multiple temperature sensors 13, the average of the temperature values ​​obtained by each temperature sensor 13 can be used as the current temperature of the battery pack 11. If the difference between the current temperature and the preset temperature is within a first range, it indicates that the difference between the current temperature and the preset temperature is small. However, since the current temperature is greater than the preset temperature, if the working state of the energy storage module 10 is not adjusted, the current temperature of the energy storage module 10 may continue to rise and eventually burn out the energy storage module 10. Therefore, at this time, the output power of the energy storage module 10 can be reduced, thereby reducing the temperature generated by the energy storage module 10 during operation and improving the working safety of the energy storage module 10.

[0045] Optionally, the control module 30 is further configured to perform an alarm operation when the difference between the current temperature and the preset temperature falls within a second range; and to disconnect the connection between the energy storage module 10 and the socket 20 when the difference between the current temperature and the preset temperature falls within a third range. The third range is greater than the second range, and the second range is greater than the first range.

[0046] The second and third ranges can be set according to actual needs. In an optional embodiment, the second range is 5℃~10℃ and the third range is any value greater than 10℃. The second and third ranges can also be other values, which are not specifically limited here.

[0047] Specifically, if the difference between the current temperature and the preset temperature is within the second range, it indicates a significant difference, with the current temperature exceeding the preset temperature by a considerable margin. In this case, reducing the output power of the energy storage module 10 will have limited effect on lowering its temperature. Therefore, an alarm sound can be emitted by the buzzer to attract nearby personnel to inspect the energy storage module 10. If the difference between the current temperature and the preset temperature is within the third range, it indicates an excessive difference, meaning the current temperature exceeds the preset temperature by a large margin. The probability of the energy storage module 10 burning out is high. In this case, the connection between the energy storage module 10 and the socket 20 can be disconnected to stop the energy storage module 10 from supplying power, thus improving the safety of the home smart energy storage system.

[0048] Optionally, each energy storage module 10 can be hot-swapped with the socket 20. The socket interface of the energy storage module 10 is a standardized interface design to enable hot-swappable connection with the input terminal of the socket 20. In this way, the number of energy storage modules 10 in the home smart energy storage system can be manually adjusted, improving the power supply flexibility and ease of use of the home smart energy storage system.

[0049] Optional, Figure 3 A schematic diagram of another home intelligent energy storage system provided in an embodiment of the present invention is shown below. Figure 3 As shown, the home intelligent energy storage system also includes a rectifier module 14, which is electrically connected to the bidirectional inverter 12 and the socket 20 respectively; the rectifier module 14 is used to output DC signals to the socket 20.

[0050] The rectifier module 14 includes an isolation conversion unit and a switching unit, and may also include SiC / GaN power devices to reduce conversion losses and improve power utilization. The specific structure of the rectifier module 14 can be configured according to actual needs, and is not specifically limited here.

[0051] Specifically, by setting up a rectifier module 14, the AC signal output by the bidirectional converter 12 is converted into a DC signal and then output to the DC load connected to the socket 20 to adapt to the DC load.

[0052] In an optional embodiment, the home smart energy storage system also includes a control switch located between the rectifier module 14 and the bidirectional converter 12. When the control switch is in the ON state, the AC signal output by the bidirectional converter 12 can be transmitted to the rectifier module 14, and then converted into a DC signal for the load. When the control switch is in the OFF state, the bidirectional converter 12 directly outputs an AC signal to the socket to supply power to the AC load connected to the socket. This control switch can be manually operated to suit different application scenarios.

[0053] The socket 20 can have one or more output terminals. In an optional embodiment, Figure 4 This is a schematic diagram of the structure of a socket provided in an embodiment of the present invention, as shown below. Figure 4 As shown, the socket 20 includes multiple output terminals 21. For example, the socket 20 includes six output terminals: a first output terminal 211, a second output terminal 212, a third output terminal 213, a fourth output terminal 214, a fifth output terminal 215, and a sixth output terminal 216. The number of output terminals 21 can also be other than those specified here. Thus, one output terminal can connect to one load. By providing multiple output terminals 21, the number of loads that can be connected to the socket 20 can be increased, thereby increasing the load capacity of the home smart energy storage system and improving its practicality.

[0054] Optional, Figure 5 A schematic diagram of another home intelligent energy storage system provided in an embodiment of the present invention is shown below. Figure 5 As shown, the control module 30 includes a phase synchronization unit 31, which controls the output phase of the energy storage module 10 according to the required phase of the load.

[0055] The phase synchronization unit 31 includes devices such as a phase-locked loop. Based on the fact that the phase synchronization unit 31 can realize its function, the structure of the phase synchronization unit 31 can be set according to actual needs, and no specific limitation is made here.

[0056] Specifically, the control module 30 can obtain the load's required phase through the smart meter located between the energy storage module 10 and the socket 20. If the difference between the current output phase of the energy storage unit 10 and the required phase is within a preset range, the control module 30 will continue to output at the current phase. If the difference between the current output phase of the energy storage unit 10 and the required phase exceeds the preset range, the control module 30 will adjust the PWM wave of the switching transistor in the bidirectional converter according to the difference, so that the output phase of the energy storage module 10 is close to or equal to the required phase, thereby improving the phase matching degree between the energy storage module 10 and the load and improving the safety of the load.

[0057] Optional, Figure 6 This is a schematic diagram of a home intelligent energy storage system provided in an embodiment of the present invention, as shown below. Figure 6 As shown, the control module 30 also includes a current distribution unit 32, which is used to determine the output current of each energy storage module 10 according to the power demand of the load.

[0058] The current distribution unit 32 includes resistors and / or capacitors, which can be configured according to actual needs, and no specific limitations are made here.

[0059] Specifically, when the load's power demand is less than the rated power of the energy storage module 10, and the current output power of the energy storage module 10 is less than the load's power demand, the output voltage of the current energy storage module 10 can be kept constant, while the output current of the energy storage module 10 can be increased, thereby increasing the output power of the energy storage module 10 to meet the load's power demand. When the load's power demand is greater than the rated power of the energy storage module 10, but less than or equal to n times the rated power, the number of energy storage modules 10 in operation is n. If the sum of the power supplied by each energy storage module 10 to the socket 20 is less than the required power, the output current of each energy storage module 10 can be increased, thereby increasing the output power; if the sum of the power supplied by each energy storage module 10 to the socket 20 is greater than the required power, the output current of each energy storage module 10 can be decreased, thereby decreasing the output power, so that the output power of the energy storage module 10 is close to or equal to the required power, improving the adaptability of the home smart energy storage system to the load.

[0060] Optionally, the current distribution unit 32 includes a PID calculation subunit, which is used to calculate the output current of each energy storage module 10 based on the demand current corresponding to the demand power.

[0061] Specifically, each energy storage unit 10 provides a fixed voltage to the socket 20. The ratio of the required power to the fixed voltage is the required current. The PID calculation module can calculate the output current of each energy storage module 10 based on the current output of each energy storage unit 10 and the required current, and then control the adjusted current output of each energy storage module 10 to meet the load's power requirements. Thus, by employing a PID calculation subunit, the energy storage module 10 can quickly respond to the load's power requirements, rationally allocate the output current of each energy storage unit 10, reduce the short-circuit risk of the home smart energy storage system, and exhibit strong robustness and low cost.

[0062] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, combinations, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A home intelligent energy storage system, characterized in that, include: Multiple energy storage modules, each of which includes a battery pack and a bidirectional converter; Each of the energy storage modules includes a socket interface; A socket includes an input terminal and an output terminal, wherein the input terminal is connected to at least one of the socket interfaces, and the output terminal is electrically connected to a load; A control module is electrically connected to the energy storage module; the control module is used to obtain the power demand of the load and adjust the number of energy storage modules put into operation according to the power demand.

2. The home intelligent energy storage system according to claim 1, characterized in that, The rated power provided by the energy storage module is P1, and the power required by the load is P2; When P2≤P1, the control module is used to control one of the energy storage modules to be electrically connected to the socket; When P1 < P2 ≤ n × P1, the control module is used to control n energy storage modules to be connected in parallel with the socket; Where n≥2, n∈N.

3. The home intelligent energy storage system according to claim 1, characterized in that, The energy storage module further includes a temperature sensor, which is used to obtain the current temperature of the battery pack; The control module is electrically connected to the temperature sensor, and the control module is also used to reduce the output power of the energy storage module when the difference between the current temperature and the preset temperature is within a first range.

4. The home intelligent energy storage system according to claim 3, characterized in that, The control module is also configured to: perform an alarm operation when the difference between the current temperature and the preset temperature is within a second range; and disconnect the connection between the energy storage module and the socket when the difference between the current temperature and the preset temperature is within a third range. The third range is larger than the second range, and the second range is larger than the first range.

5. The home intelligent energy storage system according to claim 1, characterized in that, Each of the energy storage modules is hot-swappable to the socket.

6. The home intelligent energy storage system according to claim 1, characterized in that, Also includes: The rectifier module is electrically connected to both the bidirectional converter and the socket; the rectifier module is used to output a DC signal to the socket.

7. The home intelligent energy storage system according to claim 1, characterized in that, The control module includes a phase synchronization unit, used to control the output phase of the energy storage module according to the phase demand of the load.

8. The home intelligent energy storage system according to claim 1, characterized in that, The control module further includes a current distribution unit, used to determine the output current of each energy storage module according to the power demand of the load.

9. The home intelligent energy storage system according to claim 8, characterized in that, The current distribution unit includes a PID calculation subunit, which is used to calculate the output current of each energy storage module based on the required current corresponding to the required power.

10. The home intelligent energy storage system according to claim 1, characterized in that, Its features are, The socket includes multiple output terminals.

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