Charging pile

Abstract

The application relates to a charging pile, which comprises a power module, an energy storage module and a control module, the control module is connected with the power module, the energy storage module and a load device respectively, the power module is further connected with the energy storage module, wherein: the power module is used for providing electric energy for the load device at a first voltage; the energy storage module is used for providing electric energy for the load device at a second voltage; the control module is used for controlling the connection mode of the power module and the energy storage module based on the charging voltage of the load device, and controlling the power module to provide electric energy for the energy storage module in the case that the load device is not accessed. Through the application, the technical problem that the power grid has a large power supply burden on the charging pile in the related art is solved, the risk of power supply congestion of the power grid is reduced while the compatibility of different power supply voltages is realized, and then the power supply burden of the power grid is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle charging, and in particular to a charging pile. Background Technology

[0002] With the increasing popularity of electric vehicles, the demand for charging stations with high-voltage fast charging capabilities is growing. During the popularization of high-voltage fast charging stations, different vehicles often have both high-voltage fast charging and conventional charging needs. Therefore, achieving compatibility of charging stations with different charging voltages is of significant research importance.

[0003] In related technologies, to achieve compatibility of charging piles with different charging voltages, multiple power modules are typically installed in the charging pile. By controlling the series and parallel connections between these power modules, the overall output voltage is adjusted, thereby achieving compatibility with different charging voltages. However, these technologies require multiple power modules to supply power to the vehicle simultaneously during peak charging periods, while during off-peak periods, multiple power modules are idle. This results in an uneven distribution of power demand from the charging pile to the power grid, increasing the burden on the power grid for the charging piles.

[0004] However, no effective solution has yet been proposed to address the technical problem of the power grid placing a heavy burden on the charging piles in the relevant technologies. Summary of the Invention

[0005] Based on this, this application provides a charging pile to solve the technical problem of the large power supply burden on the charging pile from the power grid.

[0006] This application provides a charging pile, including a power module, an energy storage module, and a control module. The control module is connected to the power module, the energy storage module, and a load device, respectively. The power module is also connected to the energy storage module, wherein:

[0007] The power module is used to provide electrical energy to the load device at a first voltage;

[0008] The energy storage module is used to provide electrical energy to the load device at a second voltage;

[0009] The control module is used to control the connection mode of the power module and the energy storage module based on the charging voltage of the load device, and to control the power module to provide power to the energy storage module when no load device is connected.

[0010] In one embodiment, the charging pile further includes a first switching unit, a second switching unit, and a third switching unit. The first switching unit is disposed between the power module and the load device, the second switching unit is disposed between the energy storage module and the load device, and the third switching unit is disposed between the power module and the energy storage module. The control module is connected to the first switching unit, the second switching unit, and the third switching unit respectively, wherein:

[0011] When the charging voltage is higher than the first voltage, the control module controls the first switch unit and the second switch unit to open, and controls the third switch unit to close.

[0012] When the charging voltage is not higher than the first voltage, the control module controls the first switch unit and the second switch unit to close, and controls the third switch unit to open.

[0013] or

[0014] When the charging voltage is not higher than the first voltage, the control module controls the first switch unit to close and controls the second switch unit and the third switch unit to open.

[0015] In one embodiment, the first switching unit, the second switching unit, and the third switching unit include a high-voltage DC relay.

[0016] In one embodiment, the control module is further configured to determine whether a load access signal exists;

[0017] If a load access signal is present, the charging voltage of the load device is determined based on the charging protocol between the control module and the load device.

[0018] In one embodiment, if there is no load access signal, it is determined whether to control the power module to provide power to the energy storage module based on the usage status of the charging pile.

[0019] In one embodiment, if there is no load access signal, it is determined whether to control the power module to provide power to the energy storage module based on the remaining battery capacity of the energy storage module.

[0020] In one embodiment, if there is no load access signal, it is determined whether the charging pile is in a usage off-peak period;

[0021] If the charging pile is in the off-peak period, it is determined whether the remaining battery capacity of the energy storage module is lower than the first capacity threshold. If it is lower than the first capacity threshold, the power module is controlled to provide power to the energy storage module.

[0022] If the charging pile is not in the off-peak period, it is determined whether the remaining battery capacity of the energy storage module is lower than the second capacity threshold. If it is lower than the second capacity threshold, the power module is controlled to provide power to the energy storage module. The second capacity threshold is lower than the first capacity threshold.

[0023] In one embodiment, the determination of the first capacity threshold and the second capacity threshold includes:

[0024] Get the charging frequency and / or charging amount of the charging pile within a preset time period;

[0025] The first capacity threshold and the second capacity threshold are determined based on the charging frequency and / or charging capacity.

[0026] In one embodiment, the power module includes an AC / DC converter, a transformer, and a DC / DC converter connected in sequence.

[0027] In one embodiment, the energy storage module includes a lithium iron phosphate battery.

[0028] This application discloses a charging pile, including a power module, an energy storage module, and a control module. The control module is connected to the power module, the energy storage module, and a load device, respectively. The power module is also connected to the energy storage module. The power module is used to provide power to the load device at a first voltage; the energy storage module is used to provide power to the load device at a second voltage; and the control module is used to control the connection mode of the power module and the energy storage module based on the charging voltage of the load device, and to control the power module to provide power to the energy storage module when no load device is connected. By controlling the connection between the power module and the energy storage module through the control module, the overall output voltage of the power module and the energy storage module can be adjusted to achieve compatibility with different charging voltages of the load equipment. At the same time, when the charging pile is idle, the power module supplies power to the energy storage module, while when the charging pile is busy, the energy storage module undertakes part of the power supply demand. This improves the power demand on the grid when the charging pile is idle and reduces the power demand on the grid when the charging pile is busy, avoiding uneven distribution of power demand on the grid from the charging pile. It solves the technical problem of the grid's heavy power supply burden on the charging pile in related technologies. While achieving compatibility with different power supply voltages, it reduces the risk of grid power congestion, thereby reducing the power supply burden on the grid. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of a charging pile according to an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a charging pile according to another embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the switching unit circuit according to an embodiment of this application;

[0032] Figure 4 This is a schematic diagram of the control flow relating the power module and the energy storage module according to an embodiment of this application;

[0033] Figure 5 This is a schematic flowchart of a charging method for an energy storage module according to an embodiment of this application. Detailed Implementation

[0034] 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. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0035] Currently, 400V charging piles remain the mainstream for electric vehicle charging. With the increasing demand for high-voltage fast charging of electric vehicles, the widespread adoption of 800V charging piles is becoming increasingly urgent. However, during the transition from 400V to 800V charging piles, there will inevitably be situations where 400V and 800V charging demands coexist. Therefore, achieving compatibility between these two charging demands is a pressing problem that the charging pile industry needs to solve.

[0036] In related technologies, the power module is the core component of a charging pile. The charging pile uses the power module to convert the mains power from the grid and supply energy to the electric vehicle at a pre-designed power output. Currently, the mainstream power modules on the market include the following specifications: 1) 7.5KW power, output voltage 200-400V; 2) 15KW power, output voltage 200-400V; 3) 15KW power, output voltage 300-750V. In traditional charging piles, the appropriate power module is generally selected based on the power and voltage range of different vehicle models. When multiple power supply needs exist, multiple power modules of corresponding specifications need to be installed. This makes it impossible to be compatible with different supply voltages, such as 400V and 800V, resulting in limitations in the use of charging piles and high hardware costs.

[0037] To achieve compatibility with different power supply voltages, related technologies control the charging process by connecting multiple power modules in parallel or series, thus achieving compatibility with different power supply voltages without requiring separate power modules for each voltage. However, this approach still has limitations. During peak charging periods, multiple power modules need to supply power to the vehicle simultaneously, while during off-peak periods, these modules are idle, resulting in uneven distribution of electricity demand from the charging pile to the grid. This increases the risk of grid congestion and consequently increases the burden on the grid for the charging pile. Furthermore, this approach fails to make efficient use of the price difference between peak and off-peak electricity demand. Therefore, this application provides a charging pile to address the aforementioned technical problems.

[0038] In one embodiment, a charging pile is provided, including a power module, an energy storage module, and a control module. The control module is connected to the power module, the energy storage module, and a load device, respectively. The power module is also connected to the energy storage module. The power module is used to provide power to the load device at a first voltage; the energy storage module is used to provide power to the load device at a second voltage; and the control module is used to control the connection method of the power module and the energy storage module based on the charging voltage of the load device, and to control the power module to provide power to the energy storage module when no load device is connected.

[0039] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a charging pile according to an embodiment of this application.

[0040] Specifically, such as Figure 1 As shown, if a load device 400 is connected, the power module 100 and the energy storage module 200 are connected to the load device 400 through the control module 300. The power module 100 and the energy storage module 200 together serve as a unified power supply module to supply power to the load device 400. If no load device 400 is connected, the power module 100 can be directly connected to the energy storage module 200 to provide power to the energy storage module 200.

[0041] Specifically, the power module 100 in this embodiment can be connected to the power grid to convert the mains power and provide power to the load device 400 with a first voltage. Preferably, the power module 100 in this embodiment is a conventional power module 100, such as a power module 100 with an output voltage of 400V in the prior art.

[0042] Specifically, the energy storage module 200 in this embodiment is a battery pack with energy storage function. The battery pack includes, but is not limited to, lithium iron phosphate battery packs, ternary lithium battery packs, or battery packs formed by cascading lithium iron phosphate batteries and ternary lithium batteries. The power supply voltage of the energy storage module 200 is set to a second voltage.

[0043] Specifically, in this embodiment, the control module 300 is used to acquire the charging voltage of the load device 400 and control the connection mode of the power module 100 and the energy storage module 200 in the charging pile according to the charging voltage. It is understood that the connection mode of the power module 100 and the energy storage module 200 will be different under different charging voltages of the load device 400.

[0044] For example, both the first voltage and the second voltage are set to 400V. The control module 300 controls the power module 100 and the energy storage module 200 to perform parallel step-down or parallel step-up voltage conversion, thereby meeting the 400V and 800V charging voltage requirements of the load device 400, such as an electric vehicle. During the charging handshake phase with the load device 400, the control module 300 determines the charging voltage of the load device 400 and selects the parallel output mode or series output mode of the power module 100 and the energy storage module 200.

[0045] For example, the control module 300 can be configured as a computing unit with computing, control, and communication capabilities. After determining the charging voltage of the load device 400, the control module 300 controls the on / off state of the circuit containing the power module 100 and the energy storage module 200, thereby adjusting the connection relationship between the power module 100 and the energy storage module 200. Alternatively, the control module 300 can also be configured as a transistor switch, which controls the connection relationship between the power module 100 and the energy storage module 200 by turning on or off an electrical signal associated with the charging voltage of the load device 400.

[0046] Specifically, in this embodiment, the control module 300 can also control the power module 100 to charge the energy storage module 200 when the charging pile is idle, i.e., when no load device 400 is connected, so as to pre-store the electrical energy required for the next charging of the load device 400.

[0047] Please see Figure 2 , Figure 2 This is a schematic diagram of the structure of a charging pile according to another embodiment of this application.

[0048] For example, in this embodiment, the control module 300 is set as the off-board charger controller of the charging pile. The charging pile is also equipped with a voltage conversion module. The off-board charger controller is connected to the voltage conversion module through a bus. The power module 100 and the energy storage module 200 are respectively connected to port 1 and port 2 of the voltage conversion module. The port 3 and port 4 of the voltage conversion module are respectively connected to the negative output port and positive output port of the charging pile.

[0049] For example, such as Figure 2 As shown, when the load device 400 is connected, the power module 100 and the energy storage module 200 are connected to the load device 400 through the voltage conversion module. The off-board charger controller obtains the charging voltage of the load device 400 and sends a control command to the voltage conversion module based on the charging voltage. The voltage conversion module is used to adjust its internal circuit structure according to the control command of the off-board charger controller, thereby adjusting the connection method of the power module 100 and the energy storage module 200 so that the power module 100 and the energy storage module 200 can supply power to the load device 400 in series or in parallel.

[0050] It should be noted that in this embodiment, each of the power module 100, energy storage module 200, and control module 300 is used as an example, but the number of power modules 100, energy storage modules 200, and control modules 300 is not limited. In practical applications, one or more power modules 100, energy storage modules 200, and control modules 300 can be set as needed.

[0051] In this embodiment, the charging pile includes a power module, an energy storage module, and a control module. The control module is connected to the power module, the energy storage module, and the load device, respectively. The power module is also connected to the energy storage module. Specifically: the power module is used to provide power to the load device at a first voltage; the energy storage module is used to provide power to the load device at a second voltage; and the control module is used to control the connection mode of the power module and the energy storage module based on the charging voltage of the load device, and to control the power module to provide power to the energy storage module when no load device is connected. By controlling the connection between the power module and the energy storage module through the control module, the overall output voltage of the power module and the energy storage module can be adjusted to achieve compatibility with different charging voltages of the load equipment. At the same time, when the charging pile is idle, the power module supplies power to the energy storage module, while when the charging pile is busy, the energy storage module undertakes part of the power supply demand. This improves the power demand on the grid when the charging pile is idle and reduces the power demand on the grid when the charging pile is busy, avoiding uneven distribution of power demand on the grid from the charging pile. It solves the technical problem of the grid's heavy power supply burden on the charging pile in related technologies. While achieving compatibility with different power supply voltages, it reduces the risk of grid power congestion, thereby reducing the power supply burden on the grid.

[0052] In another embodiment, the charging pile further includes a first switching unit, a second switching unit, and a third switching unit. The first switching unit is disposed between the power module and the load device, the second switching unit is disposed between the energy storage module and the load device, and the third switching unit is disposed between the power module and the energy storage module. The control module is connected to the first switching unit, the second switching unit, and the third switching unit respectively. Specifically: when the charging voltage is higher than a first voltage, the control module controls the first and second switching units to open and controls the third switching unit to close; when the charging voltage is not higher than the first voltage, the control module controls the first and second switching units to close and controls the third switching unit to open; or when the charging voltage is not higher than the first voltage, the control module controls the first switching unit to close and controls the second and third switching units to open.

[0053] Please see Figure 3 , Figure 3 This is a schematic diagram of the switching unit circuit according to an embodiment of this application.

[0054] Specifically, such as Figure 3 As shown, port 1 in the switching unit circuit is used to connect the power module, port 2 is used to connect the energy storage module, port 3 is used to connect the positive output port of the charging pile, and port 4 is used to connect the negative output port of the charging pile. The switching unit circuit includes a first switching unit K1, a first switching unit K2, and a third switching unit K3. The first switching unit K1 is located between the power module and the load device, the first switching unit K2 is located between the energy storage module and the load device, and the third switching unit K3 is located between the power module and the energy storage module. The control module is connected to the first switching unit K1, the first switching unit K2, and the third switching unit K3 respectively.

[0055] Specifically, when the charging voltage is higher than the first voltage, the power module and the energy storage module need to be connected in series to boost the voltage. At this time, the control module controls the first switch unit K1 and the first switch unit K2 to open and controls the third switch unit K3 to close, thereby realizing the series connection of the power module and the energy storage module.

[0056] Specifically, when the charging voltage is not higher than the first voltage, the power module and the energy storage module need to be connected in parallel. In this case, the control module controls the first switch unit K1 and the first switch unit K2 to close, and controls the third switch unit K3 to open, thereby realizing the parallel connection of the power module and the energy storage module. Alternatively, when the charging voltage is not higher than the first voltage, the load device can be powered only through the power module. In this case, the control module controls the first switch unit K1 to close, and controls the first switch unit K2 and the third switch unit K3 to open, thereby connecting only the power module in the circuit.

[0057] For example, in this embodiment, both the first voltage and the second voltage are 400V. When the charging voltage of the load device is 800V, the control module controls the first switch unit K1 and the first switch unit K2 to open, and controls the third switch unit K3 to close, so that the power module and the energy storage module can be connected in series to boost the voltage and meet the charging requirement of 800V; when the charging voltage of the load device reaches 400V, the control module controls the first switch unit K1 and the first switch unit K2 to close, and controls the third switch unit K3 to open, so that the power module and the energy storage module can be connected in parallel to meet the charging requirement of 400V.

[0058] In this embodiment, a first switch unit, a second switch unit, and a third switch unit are provided in the charging device. The first switch unit, the second switch unit, and the third switch unit are controlled by a control module to adjust the connection relationship between the power module and the energy storage module. The control method is simple and easy to implement, thereby improving the stability of the connection relationship adjustment between the power module and the energy storage module and reducing the hardware cost of the charging pile.

[0059] In another embodiment, the first switching unit, the second switching unit, and the third switching unit include a high-voltage DC relay.

[0060] Specifically, in this embodiment, the first, second, and third switching units are all configured as high-voltage DC relays. The high-voltage DC relay in this embodiment consists of a coil, an iron core, an armature, and contacts. When the relay coil is connected to a DC current of rated voltage, the coil generates a magnetic field, attracting the iron core. The normally open contact connected to the iron core closes, while the normally closed contact opens. When the relay coil is de-energized, the coil loses its magnetic field, and the attracted iron core returns to its original position under the action of a spring. The normally open contact connected to the iron core opens, while the normally closed contact closes. Therefore, the high-voltage DC relay includes a control system and a controlled system. The input current of the control system controls the on / off state of the controlled system.

[0061] Specifically, in this embodiment, the control system of the high-voltage DC relay is connected to the control module, and the controlled system is used to connect the power module, the energy storage module, and the load device. The control module sends control signals to the control system of the high-voltage DC relay, thereby controlling the on / off state of the controlled system of the high-voltage DC relay, and thus adjusting the connection mode of the power module and the energy storage module.

[0062] For example, in this embodiment, the rated voltage of the high-voltage DC relay is not lower than the first voltage and the second voltage, and the rated current is not lower than the maximum output current of the power module and the energy storage module, so as to ensure the stability of the circuit.

[0063] In this city's example, the first switch unit, the second switch unit, and the third switch unit are set as high-voltage DC relays. The high-voltage DC relays have advantages such as high voltage resistance, strong load capacity, and strong impact resistance, thereby improving the stability and safety of the charging pile.

[0064] In another embodiment, the control module is also used to determine whether a load access signal exists;

[0065] If a load access signal is present, the charging voltage of the load device is determined based on the charging protocol between the control module and the load device.

[0066] Specifically, the control module determines whether a load connection signal exists. For example, when a load device is connected, the impedance of the overall circuit changes, causing a change in the current in the circuit. This changed current signal is used as the load connection signal. This load connection signal is used to determine whether a load device is currently connected to the charging station.

[0067] Specifically, if a load access signal is present, it indicates that a load device is connected to the charging pile. Before supplying power to the load device, the charging voltage of the load device needs to be confirmed through the charging protocol. In this way, the connection method of the power module and energy storage module is adjusted to meet the charging voltage requirements of the load device.

[0068] In this embodiment, the charging protocol refers to the information exchange protocol between the charging pile and the load device. The charging pile uses this information exchange protocol to shake hands with the load device and obtain the charging voltage of the load device.

[0069] In this embodiment, it is first determined whether there is a load access signal. If there is a load access signal, the charging voltage of the load device is determined through the charging protocol. The judgment and interaction process is simple and fast, thereby shortening the interaction process of the charging pile and improving the charging efficiency.

[0070] Please see Figure 4 , Figure 4 This is a schematic diagram of the control flow relating the power module and the energy storage module according to an embodiment of this application.

[0071] In another embodiment, a control flow diagram illustrating the connection relationship between a power module and an energy storage module is disclosed in conjunction with the above embodiments. Specifically, as shown... Figure 4As shown, the control module first determines whether there is a vehicle load access signal. If not, it indicates that no vehicle is connected. At this time, it further determines whether the power module needs to supply power to the energy storage module. If there is, it indicates that a vehicle is connected. At this time, a charging handshake is performed with the vehicle to determine the vehicle's supply voltage, charging current, and other charging information. After determining the vehicle's charging voltage, it further determines whether the charging voltage is less than the first voltage of the power module. If it is less than the first voltage, it controls the second and third switching units to open and controls the first switching unit to close, so that the power module can charge the vehicle alone. If it is not less than the first voltage, it controls the first and second switching units to open and controls the third switching unit to close, so that the power module and the energy storage module are connected in series to boost the voltage and supply power to the vehicle. During the charging process, it determines whether charging is complete. If it is complete, the current charging task ends; otherwise, the above process continues until the power supply is complete.

[0072] In another embodiment, if there is no load access signal, it is determined whether to control the power module to provide power to the energy storage module based on the usage status of the charging pile.

[0073] Specifically, the control module determines whether a load connection signal exists. If no load connection signal exists, it indicates that no load device is connected to the charging pile at this time. It further determines the usage status of the charging pile, such as whether it is frequently used. If the charging pile is in peak usage, the power module is not controlled to supply power to the energy storage module, or the power module supplies power to the energy storage module for a short period. If the charging pile is in off-peak usage, the power module supplies power to the energy storage module for a longer period.

[0074] In this embodiment, when no load device is connected to the charging pile, the control module determines whether to control the power module to provide power to the energy storage module according to the usage status of the charging pile, thereby improving the utilization rate of the power module and the energy storage module, reducing the risk of power grid congestion, and thus reducing the power supply burden on the power grid.

[0075] In another embodiment, if there is no load access signal, it is determined whether to control the power module to provide power to the energy storage module based on the remaining battery capacity of the energy storage module.

[0076] Specifically, the control module determines whether a load connection signal exists. If no load connection signal exists, it indicates that no load device is connected to the charging pile at this time. It further determines the remaining battery capacity of the energy storage module. If the remaining battery capacity of the energy storage module is low, the control power module supplies power to the energy storage module; otherwise, if the remaining battery capacity of the energy storage module is low, it indicates that the energy storage module does not need to be replenished with power.

[0077] This embodiment determines whether to control the power module to supply power to the energy storage module based on the remaining battery capacity of the energy storage module, thereby ensuring the timely power supply of the energy storage module.

[0078] In another embodiment, if there is no load access signal, it is determined whether the charging pile is in a usage off-peak period;

[0079] If the charging station is in a period of low usage, it is determined whether the remaining battery capacity of the energy storage module is lower than the first capacity threshold. If it is lower than the first capacity threshold, the power module is controlled to provide power to the energy storage module.

[0080] If the charging station is not in a period of low usage, it is determined whether the remaining battery capacity of the energy storage module is lower than the second capacity threshold. If it is lower than the second capacity threshold, the power module is controlled to provide power to the energy storage module. The second capacity threshold is lower than the first capacity threshold.

[0081] Please see Figure 5 , Figure 5 This is a schematic flowchart of a charging method for an energy storage module according to an embodiment of this application.

[0082] Specifically, such as Figure 5 As shown, the control module detects whether there is a load access signal. If there is an access signal, it determines the charging voltage of the load device through the charging protocol, and then controls the connection relationship between the power module and the energy storage module. If there is no load access signal, there is no load access, and the control module determines whether it is necessary to control the power module to supply power to the energy storage module.

[0083] Specifically, it is determined whether the charging pile is in a low-usage period. If the charging pile is in a low-usage period, it is determined whether the remaining battery capacity of the energy storage module is lower than a first capacity threshold. If it is lower than the first capacity threshold, the power module is controlled to provide power to the energy storage module. Preferably, since the charging pile is in a restricted state, the power module supplies power to the energy storage module for a longer period of time. Therefore, the first capacity threshold can be increased as much as possible, for example, by setting the first capacity threshold to the maximum capacity of the energy storage module.

[0084] Specifically, the system determines whether the charging station is in a low-usage period. If it is not, it checks if the remaining battery capacity of the energy storage module is below a second capacity threshold. If it is, the power module supplies power to the energy storage module. The second capacity threshold is lower than the first capacity threshold. Understandably, although there is no load currently connected to the power module, the time it provides power to the energy storage module is short because it is no longer in a low-usage period. Therefore, the second capacity threshold needs to be appropriately lowered, for example, by setting it to the minimum capacity required for immediate replenishment.

[0085] Specifically, during the charging process, it is determined whether the remaining battery capacity of the energy storage module has reached the first capacity threshold or the second capacity threshold. If it has, the charging process ends; otherwise, the above steps continue to be executed to supply power to the energy storage module.

[0086] In this embodiment, the usage status of the charging pile and the remaining battery capacity of the energy storage module are considered simultaneously to determine whether the power module needs to supply power to the energy storage module. This improves the accuracy of power supply to the energy storage module, optimizes the allocation of power supply tasks to the energy storage module, and reduces the risk of grid power congestion.

[0087] In another embodiment, the determination of the first capacity threshold and the second capacity threshold includes:

[0088] Step 1: Obtain the charging frequency and / or charging amount of the charging pile within a preset time period;

[0089] Step 2: Determine the first capacity threshold and the second capacity threshold based on the charging frequency and / or charging capacity.

[0090] Specifically, the charging frequency and charging amount of the charging pile are determined within a preset time period. The charging frequency and charging amount can be determined based on the preset time period corresponding to the current time point, such as the charging frequency or charging amount in the hour preceding the current time point; or, the preset time period can be determined in combination with historical data, such as the historical average charging frequency or historical average charging amount within the time period in which the current time point is located.

[0091] Specifically, a first capacity threshold and a second capacity threshold are determined based on the charging frequency and charging amount. For example, if the charging frequency or charging amount is high within the current preset time period, a lower second capacity threshold is set.

[0092] This embodiment determines a first capacity threshold and a second capacity threshold by combining the charging frequency and / or charging amount within a preset time period, and then supplies power to the energy storage module based on the first capacity threshold and the second capacity threshold, thereby improving the accuracy of power supply control for the energy storage module.

[0093] In another embodiment, the power module includes an AC / DC converter, a transformer, and a DC / DC converter connected in sequence.

[0094] Specifically, in this embodiment, the power module includes an AC / DC converter, a transformer, and a DC / DC converter connected in sequence. The AC / DC converter converts the mains power input from the grid into direct current; the transformer transforms the voltage and provides electrical isolation between the grid and the charging station; the DC / DC converter transforms the voltage and outputs electrical energy at a first voltage.

[0095] This embodiment incorporates an AC / DC converter, a transformer, and a DC / DC converter within the power module to convert, transform, and isolate the mains power, thereby improving the accuracy of the power module's output voltage and the safety of the charging station.

[0096] In another embodiment, the energy storage module includes a lithium iron phosphate battery.

[0097] Specifically, in this embodiment, the energy storage module is set as a lithium iron phosphate battery. Lithium iron phosphate batteries have advantages such as stable performance and ease of matching the voltage range of the power module, thereby improving the stability of the charging pile and reducing hardware costs.

[0098] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0099] Those skilled in the art will understand that all or part of the processes in the methods of the above embodiments can be implemented by a computer program instructing related hardware. The computer program can be stored in a non-volatile computer-readable storage medium, and when executed, it can include the processes of the embodiments of the above methods. Any references to memory, databases, or other media used in the embodiments provided in this application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. By way of illustration and not limitation, RAM can take many forms, such as Static Random Access Memory (SRAM) or Dynamic Random Access Memory (DRAM). The databases involved in the embodiments provided in this application may include at least one type of relational database and non-relational database. Non-relational databases may include, but are not limited to, blockchain-based distributed databases. The processors involved in the embodiments provided in this application may be general-purpose processors, central processing units, graphics processing units, digital signal processors, programmable logic devices, quantum computing-based data processing logic devices, etc., and are not limited to these.

[0100] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0101] The embodiments described above are merely illustrative of several implementation methods of this application, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of this patent application. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the protection scope of this application. Therefore, the protection scope of this application should be determined by the appended claims.

Claims

1. A charging pile, characterized in that, The system includes a power module, an energy storage module, and a control module. The control module is connected to the power module, the energy storage module, and the load device. The power module is also connected to the energy storage module. The power module is used to provide electrical energy to the load device at a first voltage; The energy storage module is used to provide electrical energy to the load device at a second voltage; The control module is used to control the connection mode of the power module and the energy storage module based on the charging voltage of the load device, and to control the power module to provide power to the energy storage module when no load device is connected. The charging pile further includes a first switching unit, a second switching unit, and a third switching unit. The first switching unit is disposed between the power module and the load device, the second switching unit is disposed between the energy storage module and the load device, and the third switching unit is disposed between the power module and the energy storage module. The control module is connected to the first switching unit, the second switching unit, and the third switching unit respectively, wherein: When the charging voltage is higher than the first voltage, the control module controls the first switch unit and the second switch unit to open, and controls the third switch unit to close. When the charging voltage is not higher than the first voltage, the control module controls the first switch unit and the second switch unit to close, and controls the third switch unit to open. or When the charging voltage is not higher than the first voltage, the control module controls the first switch unit to close and controls the second switch unit and the third switch unit to open.

2. The charging pile according to claim 1, characterized in that, The first switching unit, the second switching unit, and the third switching unit include a high-voltage DC relay.

3. The charging pile according to claim 1, characterized in that, The control module is also used to determine whether a load access signal exists; If a load access signal is present, the charging voltage of the load device is determined based on the charging protocol between the control module and the load device.

4. The charging pile according to claim 3, characterized in that, If there is no load access signal, then based on the usage status of the charging pile, it is determined whether to control the power module to provide power to the energy storage module.

5. The charging pile according to claim 3, characterized in that, If there is no load access signal, then based on the remaining battery capacity of the energy storage module, it is determined whether to control the power module to provide power to the energy storage module.

6. The charging pile according to claim 3, characterized in that, If there is no load access signal, determine whether the charging pile is in a usage trough period; If the charging pile is in the off-peak period, it is determined whether the remaining battery capacity of the energy storage module is lower than the first capacity threshold. If it is lower than the first capacity threshold, the power module is controlled to provide power to the energy storage module. If the charging pile is not in the off-peak period, it is determined whether the remaining battery capacity of the energy storage module is lower than the second capacity threshold. If it is lower than the second capacity threshold, the power module is controlled to provide power to the energy storage module. The second capacity threshold is lower than the first capacity threshold.

7. The charging pile according to claim 6, characterized in that, The methods for determining the first capacity threshold and the second capacity threshold include: Get the charging frequency and / or charging amount of the charging pile within a preset time period; The first capacity threshold and the second capacity threshold are determined based on the charging frequency and / or charging capacity.

8. The charging pile according to claim 1, characterized in that, The power module includes an AC / DC converter, a transformer, and a DC / DC converter connected in sequence.

9. The charging pile according to claim 1, characterized in that, The energy storage module includes a lithium iron phosphate battery.

Images