A modular power supply system, a control method for the system, and a charging pile.

Abstract

This application relates to a modular power supply system, a control method for the system, and a charging pile. The system includes a mains power access module for connecting to mains power and multiple parallel power output terminals; a power supply module with its input terminals and output terminals connected in a one-to-one correspondence; a power output module with a power output terminal and multiple power input terminals connected in a one-to-one correspondence with the output terminals of the power supply module; the multiple power input terminals are connected in series and parallel and then superimposed to form the power output terminal; and a control module for controlling and changing the series and parallel connection relationships between the multiple power input terminals. This application utilizes the series and parallel connections between the power input terminals to reduce the impact of abnormal power supply modules on the entire modular power supply system when abnormal power supply modules exist, thus maintaining continuous power output.

Description

Technical Field

[0001] This application relates to the technical field of power systems, and in particular to a modular power system, a control method for the system, and a charging pile. Background Technology

[0002] Currently, with the rapid development of electric vehicles, charging stations providing power to them are also rapidly becoming more widespread. Existing charging stations are mainly divided into two categories: floor-mounted charging stations and wall-mounted charging stations, which can be installed in public places and residential parking lots. This allows users to charge their electric vehicles anytime, anywhere, better meeting their daily driving needs.

[0003] Existing charging pile power systems employ a single-stage PFC circuit consisting of a charging module, control module, and detection module. Appropriate PFC circuit parameters are selected based on the charging power set for the charging pile. The charging module, control module, and detection module together form a charging system that provides electrical input to the electric vehicle connected to the charging pile after it is connected to mains power.

[0004] Regarding the aforementioned technologies, the power output of the power system in charging piles is generally large. If a component in the charging module of a single-stage PFC circuit fails during use, the entire charging pile will be unable to continue outputting charging power, resulting in the charging pile becoming unusable. Summary of the Invention

[0005] To improve the continuous usability of charging piles, this application provides a modular power system, a system control method, and a charging pile.

[0006] This application provides a modular power supply system, which adopts the following technical solution.

[0007] A modular power supply system, comprising:

[0008] A mains power access module, wherein the input terminal of the mains power access module is used to connect to the mains power, and the mains power access module includes multiple power output terminals connected in parallel;

[0009] A power supply module is provided, and multiple power supply modules are provided. The number of power supply modules is the same as the number of power supply output terminals. The input terminals of the power supply modules are connected to the power supply output terminals one by one.

[0010] The power output module includes a power output terminal and multiple power input terminals. The number of power input terminals is the same as the number of power power supply modules. The power input terminals are connected one-to-one with the output terminals of the power power supply modules. The multiple power input terminals are connected in series and in parallel and then superimposed to form the power output terminal.

[0011] By adopting the above technical solution, the modular power system connects to the mains power supply via a mains access module and supplies power to each power module in the system through parallel connection, ensuring that each power module can obtain power and operate normally. After each power module starts working, the power output module aggregates the power of all power modules to achieve the final output power of the modular power system. During the power aggregation, multiple power input terminals on the power output module are connected in series and parallel. If one power module malfunctions and has no power output, the overall output power is only reduced, without rendering the entire modular power system unusable, thus improving the continuous usability of the charging station.

[0012] Optionally, the modular power supply system further includes a control module. The power output module further includes a horizontal switching unit and a vertical switching unit. The power input terminal includes a positive input and a negative input. The horizontal switching unit is connected between the positive input of the power input terminal and the horizontally adjacent negative input of the power input terminal. The vertical switching unit is connected between the positive input terminals of two vertically adjacent power input terminals and between the negative input terminals of two vertically adjacent power input terminals. The control module is electrically connected to the horizontal switching unit and the vertical switching unit respectively. The control module controls the switching on and off of the horizontal switching unit and the vertical switching unit to change the series-parallel connection relationship between the multiple power input terminals.

[0013] By adopting the above technical solution, after multiple power supply modules are connected one-to-one with the power input terminals, horizontally adjacent power input terminals are connected through horizontal switching units, and vertically adjacent power input terminals are connected through vertical switching units, enabling multiple power input terminals to be connected in series and in parallel. Both the horizontal and vertical switching units are controlled by a control module to turn on and off. Therefore, by controlling the horizontal and vertical switching units at different positions, the series and parallel connection relationships between multiple power input terminals can be changed, thereby adjusting the total output power.

[0014] Optionally, the power output module further includes a shorting switch unit, one end of which is connected to the negative input of the power input terminal, and the other end of which is connected to the positive input of the horizontal switch unit away from the power input terminal. The shorting switch unit is electrically connected to the control module.

[0015] By adopting the above technical solution, when the power supply module malfunctions, the abnormal power supply module is disconnected by turning off the horizontal switch unit connected to the power input terminal, and at the same time, the series or parallel branch where the abnormal power supply module is located is turned on by using the short-circuit switch unit, so that the entire power system can continue to be used.

[0016] Optionally, the modular power system further includes a detection module, which is electrically connected to both the power input terminal and the control module. The detection module is used to detect the received power of the power input terminal and send a detection feedback signal to the control module.

[0017] By employing the above technical solution, a detection module is used to detect power supply modules connected to multiple power input terminals to determine whether the output power of the power supply modules is normal. When an abnormal output power is detected, a detection feedback signal is sent to the control module to promptly control the conduction or cutoff of the horizontal or vertical switching units around the abnormal power supply module. This alters the electrical connections around the abnormal power supply module, adjusting the series and parallel connection relationships between multiple normal power supply output modules, allowing the entire power system to continue operating.

[0018] This application also discloses a control method for a modular power supply system, which adopts the following technical solution.

[0019] A control method for a modular power supply system, the method comprising the following steps:

[0020] Obtain the installation location and quantity information of the power input terminal, horizontal switch unit, vertical switch unit, and short-circuit switch unit, and establish the address index for controlling the horizontal switch unit, vertical switch unit, and short-circuit switch unit;

[0021] Based on the on or off states of the horizontal switching unit, the vertical switching unit, and the short-circuit switching unit, the set of series and parallel models for the power input terminal is determined.

[0022] Based on a preset control strategy, the series and parallel models of the power access terminal are matched and obtained from the series and parallel model set;

[0023] Based on the matching series-parallel model and address index, the series-parallel connection between multiple power access terminals is controlled.

[0024] By adopting the above technical solution, after the modular power system is assembled and manufactured, the number and distribution of power modules in the modular power system can be obtained by acquiring the installation location and quantity information of the power input terminal, horizontal switching unit, vertical switching unit, and short-circuit switching unit. By establishing address indexes for the horizontal switching unit, vertical switching unit, and short-circuit switching unit, it is convenient to control the switching modules at different locations through the address indexes when the control module controls the horizontal switching unit, vertical switching unit, and short-circuit switching unit to be turned on or off.

[0025] Changing the conduction of horizontal, vertical, or short-circuit switching units at different locations alters the series-parallel connection relationship between power input terminals in their original distribution, i.e., the relationship between the output terminals of the power supply modules. Therefore, by controlling the conduction or deactivation states of the horizontal, vertical, and short-circuit switching units, the set of series-parallel connection models for the power input terminals can be determined. During operation, a suitable series-parallel connection model is selected using a preset control strategy, and the series-parallel connection model and address index are used to control the switching modules at different locations, thereby achieving the series-parallel connection between the power supply modules.

[0026] Optionally, the specific method for matching and determining the series-parallel connection model of the power input terminal in the set of series-parallel connection models based on a preset control strategy includes:

[0027] Based on the detection module, the power supply module whose output is in an abnormal state is identified;

[0028] Obtain the quantity and location information of power supply modules in abnormal states, and determine the priority of shutting down abnormal series branches or abnormal parallel branches.

[0029] The series-parallel connection model of the power access terminal is determined based on the priority of the shutdown of abnormal series or parallel branches.

[0030] By adopting the above technical solution, when the power supply modules undergo series-parallel changes, a detection module is used to detect and acquire power supply modules in abnormal states. Based on the detected quantity and location signals, the abnormal series branches or abnormal parallel branches that need to be shut down and have a higher priority are identified. Through these abnormal series or parallel branches, the current series-parallel connection model is determined.

[0031] Optionally, the specific methods for obtaining the quantity and location information of power supply modules in abnormal states, and determining the priority of shutting down abnormal series branches or abnormal parallel branches, include:

[0032] Obtain the number of all power input terminals in the abnormal series branch, and obtain the number of all power input terminals in the abnormal parallel branch;

[0033] The number of power input terminals in the abnormal series branch is compared with the number of power input terminals in the abnormal parallel branch. The branch with the smaller number of power input terminals in the comparison result is determined as high priority.

[0034] By adopting the above technical solution, the distribution nodes between power access terminals can be determined from the installation location and quantity information of the power access terminals, horizontal switching units, vertical switching units, and short-circuit switching units. When a power module malfunctions and requires adjustment of the power access terminals, the number of all power access terminals in the series or parallel branches where the malfunctioning power module is located is compared, and the branches with fewer terminals are designated as high priority. This ensures that a large power output can still be guaranteed when a malfunctioning power module occurs in the modular power system.

[0035] The specific methods for determining the series-parallel connection model at the power input end based on the priority of shutting down abnormal series or parallel branches include:

[0036] Obtain the location of high-priority abnormal series or parallel branches, and determine the conduction status of the horizontal switching unit, vertical switching unit, and short-circuit switching unit;

[0037] Based on the conduction states of the horizontal switching unit, the vertical switching unit, and the short-circuit switching unit, the series-parallel connection model of the power input terminal is determined.

[0038] By adopting the above technical solution, after determining the location of abnormal series branch or abnormal parallel branch, the conduction state of the horizontal switch unit, vertical switch unit or short-circuit switch unit is determined by using the location information of the branch, thereby obtaining the series and parallel model of the power access terminal.

[0039] This application also discloses a charging pile, which includes a modular power system and a housing. The modular power system is disposed inside the housing. A power supply connector and a charging connector are connected to the housing. The power supply connector is connected to the input terminal of the mains power access module, and the charging connector is connected to the power output terminal. The modular power system is used to summarize the power output of multiple power supply modules in series and parallel, and to change the series and parallel relationship between the multiple power supply modules according to the abnormal state detected by the modular power system.

[0040] In summary, this application includes at least one of the following beneficial technical effects:

[0041] 1. By utilizing the series and parallel combination between power input terminals, when the power modules connected to the modular power system experience abnormalities, the overall power output is reduced, but this does not directly cause the entire modular power system to become unusable, thus ensuring the continuity of power output.

[0042] 2. It can change the series and parallel connection relationship between multiple power supply modules by controlling the horizontal switching unit, vertical switching unit and short-circuit switching unit at different positions, thereby adjusting the total output power;

[0043] 3. It can automatically adjust the series and parallel connection relationship between power modules connected in the modular power system based on the abnormal state of the power modules detected by the detection module, thereby increasing the continuous usability of the entire modular power system. Attached Figure Description

[0044] Figure 1 This is a system block diagram of a modular power supply system according to an embodiment of this application.

[0045] Figure 2 This is a schematic diagram of the mains power access module in a modular power system according to an embodiment of this application.

[0046] Figure 3 This is a schematic diagram of a power output module in a modular power supply system according to an embodiment of this application.

[0047] Figure 4 This is a control diagram of a control method for a modular power supply system according to an embodiment of this application.

[0048] Figure 5 This is a node address matrix established for the grid node where the power access terminal is located in a control method of a modular power system according to an embodiment of this application.

[0049] Figure 6 This is a control matrix established in a control method for a modular power supply system according to an embodiment of this application for controlling the horizontal switching unit, the vertical switching unit, and the short-circuit switching unit.

[0050] Explanation of reference numerals in the attached diagram: 1. Mains power input module; 11. Power output terminal; 2. Power supply module; 3. Power output module; 31. Power output terminal; 32. Power input terminal; 33. Horizontal switching unit; 34. Vertical switching unit; 35. Short-circuit switching unit; 4. Control module; 5. Detection module. Detailed Implementation

[0051] The present application will be further described in detail below with reference to the accompanying drawings.

[0052] This application discloses a modular power supply system.

[0053] Example 1

[0054] Reference Figure 1 The modular power supply system includes a mains power input module 1, a power supply module 2, a power output module 3, a control module 4, and a detection module 5. Multiple power supply modules 2 are configured, and these modules obtain power from the mains power input module 1. The power output from these modules 2 is then combined and summed within the power output module 3 through series and parallel connections to generate the total output power. The detection module 5 is electrically connected to the power supply modules 2 to detect abnormal conditions in real time and issue a feedback signal. The control module 4 is electrically connected to the detection module 5 and the power output module 3. The control module 4 sends control commands to the power output module 3 to change the series and parallel connections within the module, thereby altering the total output power.

[0055] Reference Figure 1 and Figure 2 The mains power access module 1 has one input terminal and multiple power output terminals 11; the input terminal of the mains power access module 1 is connected to the mains power so as to obtain electrical energy from the mains power; the multiple power output terminals 11 are connected in parallel with each other so that each power output terminal 11 can output the mains power connected to the input terminal.

[0056] Specifically, in the implementation of the modular power supply system, for the mains power access module 1, a preferred implementation method is to use a grid line configuration. Specifically, taking a single-phase power supply as an example, the horizontally arranged grid lines serve as live wires, for example, the first row, second row...Nth row are all live wires; the vertically arranged grid lines serve as neutral wires, for example, the first column, second column...Nth column are all neutral wires. For each grid line node (the grid line nodes are not connected), a live wire connection terminal is set on the horizontal grid line near the grid line node, and a neutral wire connection terminal is set on the vertical grid line near the grid line node; the live wire connection terminal and the neutral wire connection terminal together serve as the power output terminal 11. After forming multiple power output terminals 11, the entire power output terminal 11 can be distributed in a rectangular grid format.

[0057] The number of power supply modules 2 is the same as the number of power supply output terminals 11 of the mains power access module 1, and each power supply module 2 is electrically connected to one power supply output terminal 11. The parallel connection of the power supply output terminals 11 enables multiple power supply modules 2 to be connected in parallel, reducing mutual interference between the power supply modules 2 when acquiring power.

[0058] Reference Figure 1 and Figure 3The power output module 3 includes a power output terminal 31 and multiple power input terminals 32. The power output terminal 31 serves as the overall power output connection port for the modular power supply system, while the power input terminals 32 are used as connection ports to connect to the output terminals of the power power modules 2. Similarly, the number of power input terminals 32 is the same as the number of power power modules 2, and each power power module 2 is connected to both its output terminal and power input terminal 32 in a one-to-one correspondence. Through the power input terminals 32, the power output modules 3 are connected in series and parallel within the power output module 3, allowing the power output from multiple power power modules 2 to be superimposed and aggregated, ultimately resulting in the total power output from the power output terminal 31.

[0059] Reference Figure 3 The power output module 3 also includes a horizontal switching unit 33, a vertical switching unit 34, and a short-circuit switching unit 35. The power input terminals 32 are arranged in a grid pattern within the power output module 3. The horizontal switching unit 33 is connected in series between two horizontally adjacent power input terminals 32, and the vertical switching unit 34 is connected in parallel between two vertically adjacent power input terminals 32. The control module 4 is electrically connected to the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35 (not shown in the figure). By controlling the horizontal switching unit 33, the vertical switching unit 34, or the short-circuit switching unit 35 to turn on and off, the series and parallel connection relationships between the multiple power input terminals 32 can be changed.

[0060] With all the horizontal switching units 33 turned on, the power input terminal 32 can be divided into multiple series branches. These series branches are then connected in parallel via the vertical switching units 34 at both ends. In a preferred implementation, the number of power input terminals 32 in each series branch is equal.

[0061] With all longitudinal switching units 34 turned on, the power input terminal 32 can be divided into multiple parallel branches. Then, any one of the transverse switching units 33 between two adjacent parallel branches is turned on to form a series connection of the parallel branches. In a preferred implementation, the number of power input terminals 32 in each of the multiple parallel branches is equal.

[0062] Specifically, the power input terminal 32 includes a positive input and a negative input. The positive input of the power input terminal 32 is connected to the positive output of the power supply module 2, while the negative input of the power input terminal 32 is connected to the negative output of the power supply module 2. A horizontal switching unit 33 is connected between the positive input of one power input terminal 32 and the negative input of another power input terminal 32 that is horizontally adjacent to the current power input terminal 32, thus connecting two different power input terminals 32 in series. A vertical switching unit 34 is connected between the positive input terminals of two vertically adjacent power input terminals 32, and also between the negative input terminals of the two current power input terminals 32, thus achieving parallel connection of the two power input terminals 32.

[0063] For power output module 3, a preferred implementation is also a grid line configuration. Specifically, the rightmost end of the horizontally arranged grid lines is used as the positive output of the total power; the leftmost end of the horizontally arranged grid lines is also used as the positive output of the total power. The horizontal and vertical grid lines are connected, and the positive and negative inputs of the power input terminal are set between the two horizontally distributed grid line nodes. At the same time, a horizontal switching unit 33 is connected in series between the positive input and the grid line node. A vertical switching unit 34 is connected in series between the vertically distributed grid line nodes.

[0064] In the case of multiple series branches connected in parallel, if one or more power supply modules 2 malfunction in a series branch, the detection module 5 collects the detected information and sends it to the control module 4. The control module 4 then shuts down the horizontal switch unit 33 connected to the malfunctioning power supply module 2, thereby disconnecting the entire series branch and promptly eliminating the impact of the malfunctioning power supply module 2 on the total power output.

[0065] In the implementation of multiple parallel branches connected in series, if one or more power supply modules 2 malfunction in a parallel branch, the detection module 5 collects the detected information and sends it to the control module 4. The control module 4 then shuts down the horizontal switch unit 33 connected to the malfunctioning power supply module 2. Since the voltage of the parallel branch is lower than that of other parallel branches at this time, to ensure safety, in this embodiment, the entire parallel branch is short-circuited by short-circuiting the switch unit 35 to reduce the impact caused by the series connection due to voltage differences.

[0066] Specifically, one end of the short-circuit switch unit 35 is connected to the negative input of the power input terminal 32 corresponding to the short-circuit switch unit 35. After the horizontal switch unit 33 is connected in series with the positive input of the power input terminal 32, the other end of the short-circuit switch unit 35 is connected to the end of the horizontal switch unit 33 furthest from the positive input of the current power input terminal 32. That is, at this time, the short-circuit switch unit 35 is simultaneously connected in parallel with a horizontal switch unit 33 and a horizontal switch unit 33 connected in series with the current power input terminal 32. When the entire parallel branch is short-circuited, by turning on the short-circuit switch unit 35 and turning off all the horizontal switch units 33 in the parallel branch, the power supply module 2 in the entire parallel branch cannot output power.

[0067] In this embodiment, the horizontal switch unit 33, the vertical switch unit 34, and the short-circuit switch unit 35 are all electronic switches, while the control module 4 is an MCU controller, and the detection module 5 is a voltage sensor and a current sensor.

[0068] By configuring both the mains power access module 1 and the power access terminal 32 in a grid pattern, the input and output terminals of a single power module 2 can be well integrated into a smaller area, simplifying the hardware composition of the modular power system. In actual manufacturing, the power module 2 can be configured with a four-pin connector for connection to a carrier with a circuit structure, enabling power acquisition and output, facilitating future maintenance and replacement.

[0069] In this embodiment, the control module 4 stores a control program, which controls the series and parallel connection between multiple power supply modules 2. On the other hand, the control module 4 can also receive the detection feedback signal output by the detection module 5, so that power output can be maintained even when some power supply modules 2 in the modular power system malfunction.

[0070] The implementation principle of this application embodiment is as follows: By setting the output terminals of the power supply modules 2 in a series-parallel combination, after each power supply module 2 starts working, the power output module 3 is used to sum up the power of all power supply modules 2. By connecting the multiple power input terminals 32 on the power output module 3 in series and parallel, when one of the power supply modules 2 malfunctions and has no power output, the control module 4 adjusts the series-parallel connection method, enabling the modular power supply system to continue outputting power, thus solving the problem of traditional power supply systems becoming unusable due to hardware malfunctions.

[0071] This application discloses a control method for a modular power supply system.

[0072] Example 2

[0073] Reference Figure 4 The control method for a modular power supply system includes the following steps.

[0074] S1. Obtain the installation location and quantity information of the power input terminal 32, the horizontal switch unit 33, the vertical switch unit 34, and the short-circuit switch unit 35, and establish the address index for controlling the horizontal switch unit 33, the vertical switch unit 34, and the short-circuit switch unit 35.

[0075] The address index is the positioning information required by the control module 4 to control the horizontal switch unit 33, the vertical switch unit 34, or the short-circuit switch unit 35 at different positions.

[0076] Since the horizontal switching unit 33 is used to connect the power input terminal 32 in series, while the vertical switching unit 34 is used to connect the power input terminal 32 and one horizontal switching unit 33 in parallel, after obtaining the installation position and number of the power input terminals 32, the distribution of all power input terminals 32 can be obtained, and thus the installation position and number of the horizontal switching units 33 relative to the power input terminals 32 can be obtained.

[0077] Similarly, after obtaining the installation location and quantity of the power input terminal 32, the installation location and quantity of the vertical switch unit 34 relative to the power input terminal 32 can also be obtained. Therefore, after obtaining the installation location and quantity of the power input terminal 32, the horizontal switch unit 33, and the vertical switch unit 34, the common installation distribution location of these three components can be obtained.

[0078] The short-circuit switch is used to short-circuit multiple power input terminals 32 connected in parallel to form a branch. However, the parallel connection of the short-circuit switch units 35 in different positions will affect the distribution information of the entire power input terminal 32, the horizontal switch unit 33, the vertical switch unit 34, and the short-circuit switch unit 35. After obtaining the installation position and number of short-circuit switch units 35, and combining the common installation distribution positions of the power input terminal 32, the horizontal switch unit 33, and the vertical switch unit 34, the distribution information inside the entire power output module 3 can be obtained.

[0079] The address indexes for controlling the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35 are specifically represented in matrix form. (Refer to...) Figure 3 and Figure 5 For the power output module 3, a node address matrix is ​​established based on the number of rows and columns of the grid nodes, and the number of rows and columns in the node address matrix corresponds to the number of rows and columns of the grid nodes.

[0080] Reference Figure 5 and Figure 6 Based on the position of the horizontal switch unit 33, the column containing the horizontal switch unit 33 is inserted into the adjacent column of the node address matrix, thus adding three new columns, which are the second, fourth, and sixth columns respectively. Based on the position of the vertical switch unit 34, the row containing the vertical switch unit 34 is inserted into the adjacent row of the node address matrix, thus adding three new rows, which are the third, fifth, and seventh rows respectively. After the addition is completed, the complete row and column information of the control matrix is ​​finally obtained.

[0081] As for the short-circuit switch unit 35, since it is located in the first row of the distribution, it corresponds to the first row of the control matrix. Since the short-circuit switch unit 35 is connected in parallel with a power input module and a horizontal switch unit 33, it is controlled by two columns of elements in the control matrix.

[0082] In this embodiment, the number 1 is used to control the switching unit to be turned on, and the number 0 is used to control the switching unit to be turned off. For the second horizontally distributed short-circuit switch, when it is turned on, the control module 4 needs to set the third column element of the first row and the fourth column element of the first row in the control matrix to 1. If all the power access terminals 32 between the second and third columns of the node address matrix are disconnected, the control module 4 needs to set all the second row element of the fourth column, the fourth row element of the fourth column, and the sixth row element of the fourth column in the control matrix to 0 to turn off the power access terminal 32; and set the third column element of the first row and the fourth column element of the first row to 1 to short-circuit the other power access terminals 32.

[0083] S2. Based on the on or off states of the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35, determine the series and parallel model set of the power access terminal 32.

[0084] The series-parallel model refers to the circuit connection structure formed after the power input terminal 32 is connected through the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35.

[0085] For the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35, the on and off states at different positions can change the series and parallel connection relationships between the multiple power input terminals 32. Based on the on and off states of the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35, the set of series and parallel connection models between the power input terminals 32 can be determined.

[0086] In this application, the main approach is to control the horizontal switching unit 33 of a row or the vertical switching unit 34 of a column simultaneously, either by grouping rows or columns. Therefore, the number of units in the series-parallel model set can be significantly reduced when determining the series-parallel model set.

[0087] S3. Based on the preset control strategy, match and obtain the series and parallel models of the power access terminal 32 from the series and parallel model set.

[0088] The preset control strategy includes the initial control mode and the control mode under abnormal conditions stored in the control module 4. Through the preset control strategy, the series and parallel connection model of the power access terminal 32 can be quickly matched, thereby facilitating the control of the series and parallel connection relationship between the power access terminals 32.

[0089] For the initial control method, the multiple power input terminals 32 are divided into rows to form multiple series branches and then connected in parallel; or the multiple power input terminals 32 are divided into columns to form multiple parallel branches and then connected in series.

[0090] The specific method in step S3 includes the following steps.

[0091] S31. Based on the detection module 5, determine the power module whose output is in an abnormal state.

[0092] The detection module 5 continuously monitors the voltage and current of the power input terminal 32 to determine whether the power supply module 2 connected to the power input terminal 32 is abnormal. Abnormal states include output voltage exceeding a preset range or output current exceeding a preset range. When the power supply module 2 is detected to be in a normal state, the control module 4 still controls the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35 according to the initial control mode to maintain normal output power. However, when the power supply module 2 is detected to be in an abnormal state, the control mode for the abnormal state is activated.

[0093] S32. Obtain the quantity and location information of the power supply module 2 in abnormal state, and determine the priority of shutting down the abnormal series branch or the abnormal parallel branch.

[0094] In this context, an abnormal series branch refers to the series branch containing power module 2 in an abnormal state. An abnormal parallel branch refers to the parallel branch containing power module 2 in an abnormal state. For a power module 2 in an abnormal state, it is located under both an abnormal series branch and an abnormal parallel branch. For two power modules 2 in abnormal states, if they are both in the same row, then for these two power modules 2 in abnormal states, there is one abnormal series branch, but two abnormal parallel branches. The number or location of power modules 2 in abnormal states will result in different numbers of abnormal series or parallel branches.

[0095] After determining that power supply module 2 is malfunctioning, it is necessary to obtain the number and location of power supply modules 2 in the current series-parallel model to adjust the model accordingly. For malfunctioning power supply modules 2, disconnection is required in the connection circuit. In a series branch, turning off a malfunctioning power supply module 2 will disconnect the entire series branch. In a parallel branch, turning off a malfunctioning power supply module 2 will reduce the current of the entire parallel branch relative to other parallel branches. Therefore, for the parallel branch containing a malfunctioning power supply module 2, the entire parallel branch is usually short-circuited to reduce the impact of different current differences when different parallel branches are connected in series.

[0096] The specific method in step S32 includes the following steps.

[0097] S321. Obtain the number of all power access terminals 32 in the abnormal series branch and obtain the number of all power access terminals 32 in the abnormal parallel branch.

[0098] Specifically, for the abnormal series branch, when the abnormal power input terminal 32 is turned off, all power input terminals 32 in the entire series branch will no longer be connected to the total power output terminal 31. Therefore, all power input terminals 32 in the abnormal series branch include those in the abnormal state and those in the normal state. Similarly, all power input terminals 32 in the abnormal parallel branch also include those in the abnormal state and those in the normal state.

[0099] S322. Compare the number of all power access terminals 32 in the abnormal series branch with the number of all power access terminals 32 in the abnormal parallel branch, and determine the branch with the smaller number of comparison results as high priority.

[0100] For power input terminals 32 with different distribution structures, the number of power input terminals 32 connected to series branches and parallel branches are different. The final total output power is related to the number of all power input terminals 32 that are turned off. Therefore, when turning off the same number of abnormal power input terminals 32, it is necessary to compare the number of all power input terminals 32 in the abnormal series branches with the number of all power input terminals 32 in the abnormal parallel branches. The branch with the lower comparison result is designated as the higher priority abnormal branch, thereby reducing the magnitude impact on the overall output power of the modular power system.

[0101] S33. Determine the series-parallel connection model of the power access terminal 32 based on the priority of the shutdown of abnormal series branches or abnormal parallel branches.

[0102] Among them, the branches with fewer comparison results are designated as high-priority abnormal branches. That is, when high-priority branches are shut down, the number of power input terminals 32 that are still operating normally in the modular power supply system is the largest. The distribution and connection of the currently operating power input terminals 32 are used as the series-parallel connection model of the power input terminals 32.

[0103] The specific method in step S33 includes the following steps.

[0104] S331. Obtain the location of the high-priority abnormal series branch or abnormal parallel branch, and determine the conduction status of the horizontal switch unit 33, the vertical switch unit 34 and the short-circuit switch unit 35.

[0105] S332. Based on the conduction states of the horizontal switching unit 33, the vertical switching unit 34, and the short-circuit switching unit 35, the series-parallel model of the power access terminal 32 is determined.

[0106] Specifically, by determining the shutdown of the high-priority abnormal series branch or abnormal parallel branch, the conduction state of other horizontal switch units 33, vertical switch units 34 and short-circuit switch units 35 around the abnormal series branch or abnormal parallel branch is determined, so as to determine the series-parallel model of the current power access terminal 32.

[0107] S4. Based on the matching series-parallel model and address index, control the series-parallel connection between multiple power access terminals 32.

[0108] After the series-parallel model is determined in the control module 4, the correspondence between the control module 4 and the horizontal switch unit 33, the vertical switch unit 34 and the short-circuit switch unit 35 is established by the address index in matrix form. This makes it convenient for the control module 4 to control the horizontal switch unit 33, the vertical switch unit 34 and the short-circuit switch unit 35 at different positions to turn on or off, thereby changing the connection relationship between the power input terminals 32, and thus changing the total power output in the event of an abnormal power supply module 2.

[0109] This application also discloses a charging pile.

[0110] Example 3

[0111] A charging pile includes a modular power system and a housing. The modular power system is housed within the housing. A power supply connector and a charging connector are connected to the housing. The power supply connector is connected to the input terminal of a mains power access module 1, and the charging connector is connected to a power output terminal 31. The modular power system is used to aggregate the power output from multiple power supply modules 2 in series and parallel, and to change the series and parallel connection relationships between the multiple power supply modules 2 based on abnormal states detected by the modular power system.

[0112] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A modular power supply system, characterized by, include: A mains power access module (1) is provided, the input terminal of which is used to connect to the mains power, and the mains power access module (1) includes multiple power output terminals (11) connected in parallel. Power supply module (2), multiple power supply modules (2) are provided, the number of power supply modules (2) is the same as the number of power supply output terminals (11), and the input terminal of the power supply module (2) and the power supply output terminal (11) are connected one-to-one; The power output module (3) includes a power output terminal (31) and multiple power input terminals (32). The number of power input terminals (32) is the same as the number of power power supply modules (2). The power input terminals (32) and the output terminals of the power power supply modules (2) are connected one-to-one. Multiple power input terminals (32) are connected in series and parallel to each other and then superimposed to form the power output terminal (31). The power output module (3) also includes a horizontal switching unit (33), a vertical switching unit (34), and a short-circuit switching unit (35). The power input terminals (32) include... Positive input and negative input; the horizontal switch unit (33) is connected between the positive input of the power input terminal (32) and the horizontally adjacent negative input of the power input terminal (32); the vertical switch unit (34) is connected between the positive input terminals of two vertically adjacent power input terminals (32) and between the negative input terminals of two vertically adjacent power input terminals (32); one end of the short-circuit switch unit (35) is connected to the negative input of the power input terminal (32), and the other end is connected to the end of the horizontal switch unit (33) away from the positive input of the power input terminal (32); The control module (4) is used to control and change the series-parallel connection relationship between the multiple power access terminals (32). The control module (4) is electrically connected to the horizontal switch unit (33), the vertical switch unit (34) and the short-circuit switch unit (35) respectively. The control module (4) controls the opening and closing of the horizontal switch unit (33), the vertical switch unit (34) and the short-circuit switch unit (35) to change the series-parallel connection relationship between the multiple power access terminals (32).

2. The modular power supply system according to claim 1, characterized in that, It also includes a detection module (5), which is electrically connected to the power access terminal (32) and the control module (4) respectively. The detection module (5) is used to detect the received power of the power access terminal (32) and send a detection feedback signal to the control module (4).

3. A control method for a modular power supply system, characterized in that, Applied to the modular power supply system as described in any one of claims 1-2, the method includes the following steps: Obtain the installation location and quantity information of the power access terminal (32), the horizontal switch unit (33), the vertical switch unit (34) and the short-circuit switch unit (35), and establish the address index for controlling the horizontal switch unit (33), the vertical switch unit (34) and the short-circuit switch unit (35); Based on the on or off states of the horizontal switching unit (33), the vertical switching unit (34) and the short-circuit switching unit (35), the series and parallel model set of the power access terminal (32) is determined. Based on the preset control strategy, the series-parallel model of the power access terminal (32) is matched and obtained from the series-parallel model set; Based on the matching series-parallel model and address index, the series-parallel connection between multiple power access terminals (32) is controlled; Among them, the specific method for matching and determining the series-parallel model of the power access terminal (32) in the series-parallel model set based on the preset control strategy includes: Based on the detection module (5), the power supply module (2) whose output is in an abnormal state is determined; Obtain the quantity and location information of the power supply modules (2) in abnormal state, and determine the priority of shutting down the abnormal series branch or the abnormal parallel branch. The series-parallel model of the power access terminal (32) is determined based on the priority of the shutdown of abnormal series or parallel branches.

4. The control method for the modular power supply system according to claim 3, characterized in that, The specific methods for obtaining the quantity and location information of power supply modules (2) in abnormal states, and determining the priority of shutting down abnormal series branches or abnormal parallel branches, include: Obtain the number of all power input terminals (32) in the abnormal series branch, and obtain the number of all power input terminals (32) in the abnormal parallel branch; The number of all power access terminals (32) in the abnormal series branch and the number of all power access terminals (32) in the abnormal parallel branch are compared. The branch with the smaller number of comparison results is determined as high priority.

5. The control method for a modular power supply system according to claim 4, characterized in that, The specific method for determining the series-parallel model of the power access terminal (32) based on the priority of the shutdown of abnormal series branches or abnormal parallel branches includes: Obtain the location of high-priority abnormal series branches or abnormal parallel branches, and determine the conduction status of the horizontal switch unit (33), the vertical switch unit (34), and the short-circuit switch unit (35); Based on the conduction states of the horizontal switching unit (33), the vertical switching unit (34), and the short-circuit switching unit (35), the series-parallel model of the power access terminal (32) is determined.

6. A charging pile, characterized in that: Includes the modular power system and housing as described in claim 1, wherein the modular power system is disposed within the housing; the housing is connected to a power supply connector and a charging connector, wherein the power supply connector is connected to the input terminal of the mains access module (1), and the charging connector is connected to the power output terminal (31); the modular power system is used to summarize the power output of multiple power supply modules (2) in series and parallel, and to change the series and parallel relationship between multiple power supply modules (2) according to the abnormal state detected by the modular power system.

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