Electricity storage device and method and storage medium
By introducing a central control module and an energy storage module into the energy storage device, the input and output are decoupled, which solves the problem of inefficient output under low power input in the existing technology, improves the flexibility and stability of the power supply system, and adapts to the volatility of renewable energy and the diversity of load demand.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- KGE
- Filing Date
- 2025-12-25
- Publication Date
- 2026-05-15
AI Technical Summary
Existing power supply and energy storage technologies struggle to achieve continuous, high-power output under low-power input conditions and lack effective coordination and power allocation mechanisms, resulting in a high degree of dependence on the public power grid and difficulty in meeting the flexibility requirements of renewable energy fluctuations and load demands.
An energy storage device is adopted, including an input power module, a central control module, multiple parallel energy storage modules and a load module. The central control module coordinates the input power and load output to decouple them. The energy storage modules compensate for or store power when the input power fluctuates, ensuring the stability of the output power.
It achieves stable high output power under low input power conditions, reduces the demand for input power, improves the quality of power supply, reduces dependence on the public power grid, and adapts to the diversification of load demand and the fluctuation of renewable energy.
Smart Images
Figure CN122052264A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of energy storage technology, and in particular to an energy storage device, method and storage medium. Background Technology
[0002] As the global energy structure accelerates its transformation towards low-carbon and clean energy, green energy sources such as photovoltaic and wind power generation, as well as distributed power supply systems, are widely used in residential energy, microgrids, and off-grid power supply scenarios due to their environmental friendliness and flexible deployment advantages. Against this backdrop, users are increasingly demanding flexibility from power supply systems to support high output demand with low input power, expecting them to stably drive higher power loads even under conditions of significant renewable energy fluctuations and limited input power. Therefore, achieving continuous and reliable high power output under conditions of limited or even significantly lower input power than load demand has become a key challenge in current distributed energy supply and storage technologies.
[0003] Currently, power supply and energy storage systems mainly include traditional energy storage battery systems, small-scale power generation devices, photovoltaic / wind power-supported energy storage systems, and grid extension devices. Among them, traditional energy storage systems, represented by lithium-ion batteries and lead-acid batteries, typically follow a "charge first, then discharge" operating mode. Their continuous output capacity is highly dependent on the input power and energy storage status, and the input power needs to be basically matched with the output power, making it difficult to support high-power loads for a long time under low input conditions. Although small diesel or gas power generation devices can achieve higher power output through fuel conversion, their dependence on fossil fuels brings problems such as pollution, noise, and operation and maintenance costs, which are inconsistent with the development direction of green energy. In photovoltaic or wind power-supported energy storage systems, the instantaneous output power of the new energy power generation unit directly limits the charging and discharging capacity of the energy storage device. When sunlight or wind speed is insufficient, the system often cannot independently meet the demand for high-power loads and has to rely on the public grid for supplementation. Grid extension solutions are constrained by the capacity of the connected home and grid constraints, making it difficult to break through the upper limit of input power and lacking reliability under power outages or high grid load conditions.
[0004] Existing power supply and energy storage technologies generally suffer from a strong "binding" between input and output power, making it difficult to achieve continuous, high-power output under low-power input conditions. Furthermore, these technologies lack effective coordination and power allocation mechanisms, resulting in limited dynamic adaptability and a high degree of dependence on the public power grid. These shortcomings are particularly pronounced in application environments where the proportion of renewable energy is constantly increasing and load demands are becoming increasingly diversified, necessitating new approaches to energy supply and power management. Summary of the Invention
[0005] Therefore, it is necessary to address the problems of high input power requirements and poor power quality of existing energy storage devices. This invention provides an energy storage device, method, and storage medium to reduce the high input power requirements and improve the power quality of the power supply.
[0006] To achieve the above-mentioned technical effects, the technical solution of the present invention is as follows: An energy storage device, comprising: Input power module, used to connect to an external power source; The central control module is used to determine the power of the external power supply and obtain the power determination result; Multiple parallel energy storage modules are used to store and convert the input electrical energy provided by the external power source according to the power judgment result, so as to obtain the power supply energy to supply the load with the output power. A load module is used to consume the supplied electrical energy at the output power.
[0007] Preferably, the step of determining the power of the external power supply to obtain a power determination result includes: The central control module analyzes the voltage and current signals of the input electrical energy from the external power source, and calculates the input power result based on the voltage and current signals. Determine whether the input power result reaches the preset power. If yes, the power determination result is qualified; otherwise, the power determination result is unqualified.
[0008] Preferably, the energy storage module includes a bidirectional converter, an integrated power compensation module, and an energy storage module; The output terminal of the input power module is bidirectionally connected to the energy storage module and the integrated power compensation module through the bidirectional converter, and the output terminal of the integrated power compensation module is connected to the input terminal of the load module.
[0009] Preferably, the step of storing and converting the input electrical energy provided by the external power source according to the power determination result to obtain the power supply energy for supplying power to the load at output power includes: If the power judgment result is satisfactory, the central control module controls the bidirectional converter to receive the input electrical energy, output the first adapted electrical energy to the energy storage module and output the second adapted electrical energy to the integrated power compensation module; the central control module controls the energy storage module to store the first adapted electrical energy and controls the integrated power compensation module to perform power conversion on the second adapted electrical energy. If the power judgment result is not up to standard, the central control module controls the energy storage module to release the stored electrical energy to the bidirectional converter. The bidirectional converter receives the stored electrical energy and outputs the third adapted electrical energy to the integrated power compensation module. The central control module controls the integrated power compensation module to perform power superposition compensation on the input electrical energy with the stored electrical energy to obtain the power supply energy to supply the load with the output power.
[0010] Preferably, the central control module controls the energy storage module to store the first adapted electrical energy, including: The central control module collects the stored power of the energy storage module. When the stored power is lower than the low power threshold, the central control module controls the energy storage module to store the first adapted power.
[0011] Preferably, when the central control module detects that the energy storage module has stopped storing the first adapted electrical energy, it starts to release the stored electrical energy to the bidirectional converter until the remaining power of the energy storage module drops to a preset capacity ratio threshold, and then controls the energy storage module to stop releasing the stored electrical energy.
[0012] Preferably, the external power source includes a photovoltaic power generation device, a wind power generation device, and a mains power supply device.
[0013] Preferably, the energy storage module uses a composite energy storage system medium of supercapacitor and lithium battery.
[0014] The present invention also proposes an energy storage method, comprising: S1. Connect to an external power source; S2. Perform a power determination on the external power supply to obtain a power determination result; S3. Based on the power judgment result, the input electrical energy provided by the external power source is stored and converted into power to obtain the power supply energy to supply power to the load with the output power; S4. The load consumes the supplied electrical energy at the output power.
[0015] The present invention also proposes a computer-readable storage medium storing at least one executable instruction that, when executed on a computer device, causes the computer device to perform the operation of the energy storage method.
[0016] Compared with the prior art, the beneficial effects of the technical solution of the present invention are: This invention proposes an energy storage device, method, and storage medium. The energy storage device includes: an input power module for connecting to an external power source; a central control module for determining the power of the external power source and obtaining a power determination result; an energy storage module for storing and converting the input electrical energy provided by the external power source according to the power determination result, obtaining power supply energy to power a load at output power; and a load module for consuming the power supply energy at output power. This invention decouples the input power provided by the input power source from the output power output to the load by setting an energy storage module between the input power module and the load module, and by having the central control module coordinate and control this process. When the input power fluctuates or is insufficient, the energy storage module releases electrical energy for power compensation; when the input power is excessive, the energy storage module stores electrical energy for absorption, thereby effectively suppressing the impact of input power fluctuations on the output end and ensuring a stable output power on the load side. This reduces the high demand for input power and improves the quality of the power supply. Attached Figure Description
[0017] Figure 1 This is a structural block diagram of the energy storage device in an embodiment of the present invention; Figure 2 This is a schematic diagram of the energy storage device in an embodiment of the present invention; Figure 3 This is a flowchart of the energy storage method in an embodiment of the present invention. Detailed Implementation
[0018] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. It is understandable to those skilled in the art that some well-known details may be omitted from the accompanying drawings; The positional relationships depicted in the accompanying drawings are for illustrative purposes only and should not be construed as limiting this patent. To better illustrate this embodiment, some parts of the accompanying drawings may be omitted, enlarged, or reduced, and do not represent actual dimensions. The descriptions of directions such as "up" and "down" are not intended to limit this patent. To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments.
[0019] Example 1 like Figure 1 and Figure 2 As shown, this embodiment proposes an energy storage device, which includes: an input power module, a central control module, multiple parallel energy storage modules and a load module; Input power module, used to connect to an external power source; Specifically, the input power module supports switching between multiple power types and can be connected to an external power source that provides low-power input. The external power source includes a photovoltaic power generation device, a wind power generation device, and a mains power supply device, wherein the photovoltaic panel output is 1-3kW and the mains power input is 1-2kW.
[0020] The central control module is used to determine the power of the external power supply and obtain the power determination result; Specifically, the central control module is the main control unit of the system. It can send power switching commands to the input power module and control signals to the energy storage module to control the distribution of charging and discharging power. The input power module, energy storage module, and load module feed back real-time parameters to the central control module, such as input power, energy, and load demand.
[0021] The step of determining the power of the external power supply and obtaining the power determination result includes: The central control module analyzes the voltage and current signals of the input electrical energy from the external power source, and calculates the input power result based on the voltage and current signals. Determine whether the input power result reaches the preset power. If yes, the power determination result is qualified; otherwise, the power determination result is unqualified.
[0022] Multiple parallel energy storage modules are used to store and convert the input electrical energy provided by the external power source according to the power judgment result, so as to obtain the power supply energy to supply the load with the output power. Specifically, the multiple parallel energy storage modules are the core execution units, capable of generating large amounts of electricity from small amounts of electricity. The energy storage modules include bidirectional converters, integrated power compensation modules, and energy storage modules.
[0023] The output terminal of the input power module is bidirectionally connected to the energy storage module and the integrated power compensation module through the bidirectional converter, and the output terminal of the integrated power compensation module is connected to the input terminal of the load module.
[0024] Bidirectional converter: realizes the energy conversion between input power and energy storage module, with a conversion efficiency of over 96%, ensuring high output stability under low input power.
[0025] Energy storage module: Employs high-rate energy storage media, such as a composite system of supercapacitors and lithium iron phosphate, supporting rapid charging and discharging; charges to 30% C in 5 minutes and to 100% C in 15 minutes. Specific parameters: Rated output power 5kW, minimum input power 1kW, meaning it can maintain full power output when the input exceeds 1kW; rated capacity C is selected as 10kW.
[0026] The step of storing and converting the input electrical energy provided by the external power source according to the power determination result to obtain the power supply energy for supplying power to the load with output power includes: If the power judgment result is satisfactory, the central control module controls the bidirectional converter to receive the input electrical energy, output the first adapted electrical energy to the energy storage module and output the second adapted electrical energy to the integrated power compensation module; the central control module controls the energy storage module to store the first adapted electrical energy and controls the integrated power compensation module to perform power conversion on the second adapted electrical energy. If the power judgment result is not up to standard, the central control module controls the energy storage module to release the stored electrical energy to the bidirectional converter. The bidirectional converter receives the stored electrical energy and outputs the third adapted electrical energy to the integrated power compensation module. The central control module controls the integrated power compensation module to perform power superposition compensation on the input electrical energy with the stored electrical energy to obtain the power supply energy to supply the load with the output power.
[0027] Specifically, when the input power exceeds 1kW but is less than the rated output power of 5kW, the difference between the rated output power and the input power is released and supplemented by the energy storage module to maintain stable output; when the input power exceeds the rated output power of 5kW, the difference between the rated output power and the input power is used to charge the energy storage module.
[0028] A load module is used to consume the supplied electrical energy at the output power.
[0029] Specifically, the load module can be for small household loads or large loads in small factories.
[0030] Specifically, the input power module is connected to the input interface of all energy storage modules in parallel, and the energy storage modules are connected to the load module in parallel; the central control module establishes a physical connection with the communication interfaces of the input power module, energy storage module, and load module through RS485 bus or Bluetooth communication link.
[0031] The present embodiment has the following technical effects: Achieving "low input and high output": Through a power compensation mechanism, a single energy storage module only needs an input of more than 1kW to maintain an output of 5kW, which solves the problem of strong binding between input and output power in traditional technologies and realizes "small power to generate large power".
[0032] Example 2 This embodiment further explains the above embodiment's method of storing and converting the input electrical energy provided by the external power source into power supply energy to power the load. Specifically, the central control module controls the energy storage module to store the first adapted electrical energy, including: The central control module collects the stored power of the energy storage module in each energy storage module. When the stored power is lower than the low power threshold, the energy storage module in the energy storage module is controlled to store the first adapted power.
[0033] Specifically, when the energy storage module stops charging, such as when the input power is disconnected or actively stopped, and then continues to output to the load, the central control module monitors its power level in real time. When the charge drops from the current value to 30% C, immediately disconnect the output circuit of the energy storage module, stop only the energy storage module, do not affect other energy storage modules, and avoid deep discharge of the energy storage module to protect its lifespan; To restore output, the input power must be reconnected and the battery charged to more than 30% C.
[0034] When the central control module detects that the energy storage module in any energy storage module has stopped storing the first adapted energy, it starts to release the stored energy to the bidirectional converter in the current energy storage module until the remaining power of the current energy storage module drops to a preset capacity ratio threshold, and then controls the energy storage module in the current energy storage module to stop releasing the stored energy.
[0035] In addition to the method described above for the central control module to control the energy storage module to store the first adapted electrical energy, this embodiment also proposes that the central control module control the energy storage module to store the first adapted electrical energy, including: The central control module designates one energy storage module as the master control unit and the remaining energy storage modules as slave units. The central control module drives the main control unit to collect the stored power of the energy storage module in the slave unit. When the stored power is lower than the low power threshold, the module controls the energy storage module in the slave unit to store the first adapted power.
[0036] Specifically, the central control module designates one energy storage module as the master and the rest as slaves, and collects parameters such as the power, input power, and temperature of each energy storage module in real time. During charging, the master allocates charging power according to the principle of "low power module priority" based on the total input power, ensuring that all energy storage modules quickly reach 30% C to trigger the full power output condition.
[0037] In addition, during discharge: the host coordinates the output of each energy storage module according to the total power demand of the load. For example, when the load demand is 12kW, the three modules output 5kW, 5kW and 2kW respectively to avoid overload of a single unit.
[0038] When storing and converting the input electrical energy provided by the external power source to obtain the power supply energy to power the load with output power, this embodiment can also adopt a parallel charging and discharging and output control strategy: (1) Parallel charging and discharging conditions: The energy storage module supports simultaneous charging and discharging without interrupting either process. (2) Output power trigger threshold: When the energy storage module's charge exceeds 30% C, it can output full power of 5kW regardless of whether it is charging or not; if the charge is below 30% C, the output power increases linearly with the charge during the charging process, such as 3kW at 20% C and 4kW at 25% C, until the charge reaches 30% C and then returns to full power.
[0039] When storing and converting the input electrical energy provided by the external power source to obtain the power supply energy to power the load with the output power, this embodiment can also adopt an adaptation strategy for multiple types of input power sources: (1) High load scenario during the day: Prioritize access to photovoltaic power generation. When there is sufficient sunlight, the input power is higher. If the photovoltaic power is insufficient, such as on a cloudy day, the device group maintains the total power output by inputting 1kW / unit through a low input and high output mechanism to meet the high load demand, such as household appliances and small equipment.
[0040] (2) Nighttime low load scenario: Switch to mains power input, and the device group charges at low power, such as input 1kW / unit, to fully charge the energy storage module, reducing the dependence on peak grid load.
[0041] (3) Power switching logic: The central control module prioritizes photovoltaic and input power according to time, such as 6:00-18:00. If the photovoltaic power is less than the minimum requirement, it switches to mains power and automatically switches the input power. During the switching process, the energy storage module supplements the power to ensure that the load power supply is not interrupted.
[0042] The power compensation mechanism in this embodiment has the following technical effects: Rapid response and continuous output: It can charge to 30% C in 5 minutes and trigger full power output, and fully charge in 15 minutes, which can quickly respond to sudden high power demand; and it can output simultaneously while charging, avoiding the waiting time of traditional energy storage that requires full charge before use.
[0043] Extend equipment lifespan: The 30% C stop output threshold avoids deep discharge, and tests have shown that it can increase the cycle life of energy storage modules by more than 50%, reducing maintenance costs.
[0044] Flexible power and capacity expansion: The total power can be linearly expanded (N×5kW) after multiple units are combined, and only N×1kW input is required to maintain it, adapting to diverse needs from small household loads to large loads in small factories.
[0045] Improve the utilization rate of green energy: By adapting to the volatility of photovoltaic and wind power, it can still output stably when the input power is insufficient, reducing the dependence on grid power; during the day, green electricity is used to expand the power supply, and at night, grid power is used to supplement the energy, reducing the load pressure on the power grid.
[0046] Example 3 like Figure 3 As shown, this embodiment also proposes an energy storage method, including: S1. Connect to an external power source; S2. Perform a power determination on the external power supply to obtain a power determination result; S3. Based on the power judgment result, the input electrical energy provided by the external power source is stored and converted into power to obtain the power supply energy to supply power to the load with the output power; S4. The load consumes the supplied electrical energy at the output power.
[0047] This embodiment proposes an energy storage method. By setting a power compensation mechanism between the external power supply and the load power supply, and coordinating and controlling it through a central control module, the input power provided by the input power supply and the output power output to the load are decoupled. When the input power fluctuates or is insufficient, the energy storage module releases electrical energy for power compensation; when the input power is excessive, the energy storage module stores electrical energy for absorption, thereby effectively suppressing the impact of input power fluctuations on the output end and ensuring a stable output power on the load side. This reduces the high demand for input power and improves the quality of power supply.
[0048] Example 4 This embodiment proposes a computer-readable storage medium storing at least one executable instruction. When the executable instruction is executed on a computer device, it causes the computer device to perform the operation of the method for monitoring a Linux system based on a timer, specifically including the following steps: S1. Connect to an external power source; S2. Perform a power determination on the external power supply to obtain a power determination result; S3. Based on the power judgment result, the input electrical energy provided by the external power source is stored and converted into power to obtain the power supply energy to supply power to the load with the output power; S4. The load consumes the supplied electrical energy at the output power.
[0049] This embodiment decouples the input power provided by the external power source from the output power supplied to the load by setting a power compensation mechanism between the external power source and the load power supply, and coordinates and controls it through a central control module. When the input power fluctuates or is insufficient, the energy storage module releases electrical energy for power compensation; when the input power is excessive, the energy storage module stores electrical energy for absorption, thereby effectively suppressing the impact of input power fluctuations on the output end and ensuring a stable output power for the load side. This reduces the high demand for input power and improves the quality of power supply.
[0050] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.
Claims
1. An energy storage device, characterized in that, include: Input power module, used to connect to an external power source; The central control module is used to determine the power of the external power supply and obtain the power determination result; Multiple parallel energy storage modules are used to store and convert the input electrical energy provided by the external power source according to the power judgment result, so as to obtain the power supply energy to supply the load with the output power. A load module is used to consume the supplied electrical energy at the output power.
2. The energy storage device according to claim 1, characterized in that, The step of determining the power of the external power supply and obtaining the power determination result includes: The central control module analyzes the voltage and current signals of the input electrical energy from the external power source, and calculates the input power result based on the voltage and current signals. Determine whether the input power result reaches the preset power. If yes, the power determination result is qualified; otherwise, the power determination result is unqualified.
3. The energy storage device according to claim 2, characterized in that, The energy storage module includes a bidirectional converter, an integrated power compensation module, and an energy storage module. The output terminal of the input power module is bidirectionally connected to the energy storage module and the integrated power compensation module through the bidirectional converter, and the output terminal of the integrated power compensation module is connected to the input terminal of the load module.
4. The energy storage device according to claim 3, characterized in that, The step of storing and converting the input electrical energy provided by the external power source according to the power determination result to obtain the power supply energy for supplying power to the load with output power includes: If the power judgment result is satisfactory, the central control module controls the bidirectional converter to receive the input electrical energy, output the first adapted electrical energy to the energy storage module and output the second adapted electrical energy to the integrated power compensation module; the central control module controls the energy storage module to store the first adapted electrical energy and controls the integrated power compensation module to perform power conversion on the second adapted electrical energy. If the power judgment result is not up to standard, the central control module controls the energy storage module to release the stored electrical energy to the bidirectional converter. The bidirectional converter receives the stored electrical energy and outputs the third adapted electrical energy to the integrated power compensation module. The central control module controls the integrated power compensation module to perform power superposition compensation on the input electrical energy with the stored electrical energy to obtain the power supply energy to supply the load with the output power.
5. The energy storage device according to claim 4, characterized in that, The central control module controls the energy storage module to store the first adapted electrical energy, including: The central control module collects the stored power of the energy storage module. When the stored power is lower than the low power threshold, the central control module controls the energy storage module to store the first adapted power.
6. The energy storage device according to claim 5, characterized in that, When the central control module detects that the energy storage module has stopped storing the first adapted electrical energy, it begins to release the stored electrical energy to the bidirectional converter until the remaining power of the energy storage module drops to a preset capacity ratio threshold, at which point it controls the energy storage module to stop releasing the stored electrical energy.
7. The energy storage device according to any one of claims 1-6, characterized in that, The external power sources include photovoltaic power generation devices, wind power generation devices, and mains power supply devices.
8. The energy storage device according to claim 3, characterized in that, The energy storage module uses a composite energy storage system medium of supercapacitor and lithium battery.
9. An energy storage method, characterized in that, include: S1. Connect to an external power source; S2. Perform a power determination on the external power supply to obtain a power determination result; S3. Based on the power judgment result, the input electrical energy provided by the external power source is stored and converted into power to obtain the power supply energy to supply power to the load with the output power; S4. The load consumes the supplied electrical energy at the output power.
10. A computer-readable storage medium, characterized in that, The storage medium stores at least one executable instruction, which, when executed on a computer device, causes the computer device to perform the operation of the energy storage method as described in claim 9.