A charging system and method based on a charging pile redundant power module

Abstract

The application provides a charging system and method based on a redundant power module of a charging pile, which comprises a redundant charging power module, a state monitoring module and a redundant switching control module.The redundant charging power module comprises a plurality of charging power modules and is used for converting input power into charging power and outputting the charging power.The state monitoring module is connected to the plurality of charging power modules and is used for monitoring the working states of the charging power modules.The redundant switching control module comprises a redundant power switching module and a state control module, the redundant power switching module is connected to the plurality of charging power modules, the state control module is connected to the state monitoring module, and the state control module is used for selecting and switching different charging power modules to output to the charging pile according to the output of the state monitoring module.A charging gun is installed on the charging pile, and an input end of the charging gun is connected to the redundant switching control module.The charging pile power module can be replaced in a modularized mode, the redundant operation is better, the system efficiency is improved on the premise of reducing the failure rate, the reliability of the charging pile is improved, and long-life operation of the power module is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of electric power new energy, and in particular to a charging system and method based on a redundant power module of a charging pile. BACKGROUND

[0002] With the development of electric new energy vehicle technology, the endurance mileage of new energy vehicles is getting longer and longer, the number of new energy vehicles is getting larger and larger, and the demand for charging piles is increasing year by year, and the charging pile has entered a period of rapid development. Due to the increase in charging demand and the great improvement in charging timeliness, the demand for charging pile systems with functions such as supercharging, fast charging, large-capacity charging, quick maintenance, and convenient expansion has been proposed. The existing market charging pile products can only provide basic charging services, and some charging piles can achieve supercharging and fast charging, but most of them use an integrated structure and cannot realize power module redundancy. A few modular charging piles using modular architecture also have no related redundancy strategy, which leads to frequent failure and damage of charging piles in use, and the charging piles cannot be charged normally, resulting in poor reliability. The existing charging pile products have single power module operation mode, and the following problems exist:

[0003] The existing charging pile does not realize a full modular architecture, making it difficult to expand and replace the equipment, especially when a part of the charging pile unit fails, the machine needs to be shut down for fault positioning, maintenance or replacement. The maintenance time is long, the charging pile system cannot work for a long time, and the operation income is lost.

[0004] The existing modular charging pile does not have a scientific power module redundancy method, resulting in high power module failure rate and low system efficiency. SUMMARY

[0005] Therefore, the present application proposes a charging system and method based on a redundant power module of a charging pile, which can realize modular replacement of the power module of the charging pile, better redundancy operation, and improve the system efficiency under the premise of reducing the failure rate. It can improve the reliability of the charging pile and ensure the long-life operation of the power module.

[0006] The technical solution of the present application is: a charging system based on a redundant power module of a charging pile, comprising:

[0007] A redundant charging power module includes a plurality of charging power modules for converting input power into charging power and outputting;

[0008] A state monitoring module is connected to the plurality of charging power modules for monitoring the working state of each charging power module;

[0009] The redundancy switching control module comprises a redundancy power switching module and a state control module, the redundancy power switching module is connected to the plurality of charging power modules, and the state control module is connected to the state monitoring module and used for selecting and switching different charging power modules to output to the charging pile according to the output of the state monitoring module.

[0010] The charging pile is provided with a charging gun, and an input end of the charging gun is connected to the redundancy switching control module.

[0011] Further, the state monitoring module comprises:

[0012] The working time monitoring module is used for monitoring the working time of each charging power module, including the continuous working time length, the starting working time, the ending working time and the sleep time length.

[0013] The load monitoring module is used for monitoring the load state of each charging power module, including the current load power, whether the load is overloaded or not and whether the load is idle or not.

[0014] The fault monitoring module is used for monitoring whether each charging power module is faulty, recording the corresponding charging power module serial number and the fault reason code.

[0015] Further, the state control module is used for setting the maximum charging working time length of each charging power module, the rotation period and the switching priority, wherein the switching priority is used for determining whether the maximum charging working time length is switched or the rotation period is switched.

[0016] The maximum working time length refers to the continuous working time length and the total time length of discontinuous working in a predetermined time period.

[0017] Further, the charging power module comprises a normal working mode and an energy-saving working mode, wherein in the energy-saving working mode, the module works in turn according to a second rotation period, wherein the second rotation period is close to the lowest point of module loss and makes the module in a hot engine state, and the module can automatically switch to the normal working mode.

[0018] Further, when the charging power modules sleep and rotate, a first charging power module is started in advance before entering sleep, and the first charging power module is closed after the second charging power module reaches a stable state.

[0019] Further, when the maximum charging working time length is rotated, the next charging power module is automatically switched to output electric energy, and the method specifically comprises the following steps.

[0020] According to the time length data obtained by the monitoring module, the longest sleep time charging power module is searched, the longest sleep time charging power module is started, and the module with the maximum charging working time length is turned off.

[0021] Further, the state control module can also set an automatic rotation mode, in which every predetermined interval, the system automatically starts the longest continuous sleep time charging power module and turns off the longest continuous working time module, so as to balance the working time of the modules.

[0022] In this case, by setting a time interval, for example, 20 minutes, the working time of the power modules can be automatically adjusted at a high frequency, so that the working time of each module is more balanced.

[0023] Further, it further comprises a display configuration module:

[0024] The display configuration module can be configured to display the energy-saving state of the charging power module locally and in the background, and the relevant parameters can be set locally or in the background.

[0025] Further, the state control module assigns available charging power modules to replace the faulty charging power modules according to the monitoring data of the fault monitoring module.

[0026] According to another aspect of the present application, a method for charging using the aforementioned charging system is also proposed, comprising:

[0027] When the system starts to power on, the working state of the charging power module is monitored;

[0028] The redundancy switching control module is used to select and switch different charging power modules to output to the charging pile according to the output of the state monitoring module, so as to ensure that when any power module in the system fails, it does not affect the normal working of the energy-saving control system of the system. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 : a charging system block diagram based on redundant power modules of charging piles according to the present application;

[0030] Figure 2 : process flow chart of the state control module of the present application for switching redundant charging power modules. DETAILED DESCRIPTION

[0031] Clearly, the described embodiments are only a part of the embodiments of the present application, and not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative effort fall within the protection scope of the present application.

[0032] According to an embodiment of the present application, a charging system based on a redundant power module of a charging pile is provided, as shown in Figure 1 , which comprises a host part and a charging pile part, and specifically as follows:

[0033] The redundant charging power module comprises a plurality of charging power modules, which are used to convert input power into charging power and output;

[0034] The state monitoring module is connected to the plurality of charging power modules, and is used to monitor the working state of each charging power module;

[0035] The redundant switching control module comprises a redundant power switching module and a state control module, the redundant power switching module is connected to the plurality of charging power modules, and the state control module is connected to the state monitoring module, and is used to select and switch different charging power modules to output to the charging pile according to the output of the state monitoring module;

[0036] The charging gun is installed on the charging pile, and the input end of the charging gun is connected to the redundant switching control module.

[0037] Further, the state monitoring module comprises:

[0038] The working time monitoring module is used to monitor the working time of each charging power module, including continuous working time, starting working time, ending working time, and sleep time;

[0039] The load monitoring module is used to monitor the load state of each charging power module, including current load power, whether overload, and whether idle;

[0040] The fault monitoring module is used to monitor whether each charging power module is faulty, record the corresponding charging power module serial number, and record the fault reason code.

[0041] Further, as shown in Figure 2 , the state control module is used to set the maximum charging working time of each charging power module, the rotation period, and the switching priority, wherein, according to the switching priority, it is determined whether to switch according to the maximum charging working time or according to the rotation period. Figure 2In the embodiment, the state control module sets the maximum charging work duration and the rotation period of the charging power module respectively, and sets the priority of the two, such as high priority, low priority, etc. Then, after the system starts to work, it is determined whether the maximum charging work duration or the rotation period is given priority, and the subsequent scheduling strategy is determined according to the result of the determination.

[0042] The maximum work duration refers to the duration of continuous work and the total duration of discontinuous work in a predetermined time period.

[0043] When the maximum charging work duration is given priority, it is first determined whether the charging power module has been continuously working for more than a predetermined work duration, such as 2 hours. If so, switch to the next charging power module to output power, or, it can be determined that the duration of discontinuous work of the charging power module in a predetermined time, such as 4 hours, exceeds 3 hours, then switch to the next charging power module to output power.

[0044] When the priority is set according to the rotation period, the charging power module is rotated according to the first rotation period, such as every 2 hours, and the next charging power module is switched to output power. The first rotation period is calculated according to the currently available charging power module, for example, if there are 8 charging power modules available, the rotation period can be set to 24 / 8=3 hours, and if there are 6 devices available, the rotation period is set to 24 / 6=4 hours, where 24 refers to 24 hours a day.

[0045] Further, the charging power module includes a normal working mode and an energy-saving working mode. In the energy-saving working mode, the module works in turn according to the second rotation period, wherein the second rotation period is when the module loss is close to the minimum and the module is in a hot engine state, and the module can automatically switch to the normal working mode.

[0046] Further, the second rotation period is calculated according to the working loss law of the charging power module. Within the duration of the second rotation period, the charging power module is in a high-efficiency state, such as more than 75%, i.e. no overheating and no overloading.

[0047] Further, when the charging power module is in a dormant rotation, the first charging power module is turned on before it goes to sleep, and the second charging power module is turned on before it goes to sleep. When the second charging power module reaches a stable state, the first charging power module is turned off.

[0048] By using the above-mentioned first-on and then-off rotation working mode, different charging power modules can be smoothly switched, avoiding impact on the working charging pile or charging vehicle, and avoiding the same power module working for too long, causing inconsistent life between modules.

[0049] Further, when the maximum charging working time is rotated, the next charging power module is automatically switched to output power, which specifically includes:

[0050] According to the time length data obtained by the monitoring module, the charging power module with the longest sleep time is searched, the charging power module with the longest sleep time is started, and the module with the longest continuous working time is turned off.

[0051] Further, the state control module can also set an automatic rotation mode, in which the system automatically starts the charging power module with the longest continuous sleep time and turns off the module with the longest continuous working time every predetermined interval, so that the working time of the modules is balanced.

[0052] In this case, by setting a time interval, for example, 20 minutes, the working time of the power modules can be automatically adjusted at a high frequency, so that the working time of each module is more balanced.

[0053] Further, it also includes a display configuration module:

[0054] The display configuration module can be configured to display the energy-saving state of the charging power module locally and in the background, and the relevant parameters can be set locally or in the background.

[0055] Further, the state control module assigns available charging power modules to replace the faulty charging power modules according to the monitoring data of the fault monitoring module.

[0056] According to another aspect of the present application, a method for charging using the aforementioned charging system is also proposed, which includes:

[0057] When the system starts to power on, the working state of the charging power module is monitored;

[0058] The redundant switching control module is used to select and switch different charging power modules to output to the charging pile according to the output of the state monitoring module, so that when any power module in the system fails, it does not affect the normal work of the energy-saving control system of the system.

[0059] As can be seen, the redundant power module charging system of the present application can normally operate all system modules when the control module in the charging pile system device fails, i.e., according to the initial setting parameter value of the module. When any power module in the system fails, it does not affect the normal work of the energy-saving control system of the system. Moreover, by monitoring the fault code of the fault monitoring module, the charging power module that fails can be quickly located, and the fault can be eliminated by simple modular replacement, greatly shortening the repair and fault elimination time.

[0060] Optionally, the control technology of module hibernation rotation should have manual and automatic start energy saving option function, and requires each equipment manufacturer to set the default as automatic control energy saving state.

[0061] Further, the automatic function can control the operation of automatic energy saving mode according to system configuration and monitoring information, and ensure the safe operation of system power supply. The automatic energy saving mode control can be divided into: automatic "energy saving" and "non-energy saving" mode. The automatic energy saving mode makes the charging power module not in working state enter hibernation mode, and the "non-energy saving mode" makes the charging power module not in working state not enter hibernation mode, so as to improve the start speed. In addition, the manual function should have the setting functions of artificial maintenance temporary "non-energy saving" and artificial forced "non-energy saving".

[0062] Although the above describes the specific embodiments of the present application in order to facilitate the understanding of the present application by those skilled in the art, it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, all kinds of changes within the spirit and scope of the present application defined and determined by the appended claims are obvious, and all kinds of inventions using the concept of the present application are included in the protection.

Claims

1. A charging system based on redundant power modules of a charging pile, characterized in that, include: A redundant charging power module, comprising multiple charging power modules, is used to convert input power into charging power and output it. The status monitoring module is connected to multiple charging power modules and is used to monitor the working status of each charging power module. The redundancy switching control module includes a redundancy power switching module and a status control module. The redundancy power switching module is connected to multiple charging power modules, and the status control module is connected to the status monitoring module. It is used to select and switch different charging power modules to output to the charging pile according to the output of the status monitoring module. The charging pile is equipped with a charging gun, and the input end of the charging gun is connected to the redundancy switching control module. The status monitoring module includes: The working time monitoring module is used to monitor the working time of each charging power module, including continuous working time, start working time, end working time, and sleep time. The load monitoring module is used to monitor the load status of each charging power module, including the current load power, whether it is overloaded, and whether it is unloaded. The fault monitoring module is used to monitor whether each charging power module is faulty, record the corresponding charging power module serial number, and the cause code of the fault; The status control module is used to set the maximum charging working time, rotation cycle, and switching priority of each charging power module. The switching priority is used to determine whether to switch according to the maximum charging working time or according to the rotation cycle. The maximum charging working time refers to the duration of continuous operation and the total duration of discontinuous operation within a predetermined time period. When the maximum charging working time is set as the priority, it is first determined whether the charging power module has been working continuously for more than the predetermined working time. If so, it is switched to the next charging power module to output power. Alternatively, it can be determined that the cumulative time of discontinuous operation of the charging power module within the predetermined time exceeds the predetermined time, and then the next charging power module is switched to output power.

2. The charging system based on a redundant power module of a charging pile according to claim 1, characterized in that, The charging power module includes a normal working mode and an energy-saving working mode. In the energy-saving working mode, the module works in turn according to the second replacement cycle. In the second replacement cycle, the module loss is close to the minimum point and the module is in a warm-up state, which can automatically switch to the normal working mode. The second replacement cycle is calculated based on the working loss pattern of the charging power module. During the duration of this second replacement cycle, the charging power module is in a state with a higher efficiency than the predetermined efficiency, without overheating or overload.

3. A charging system based on a redundant power module of a charging pile according to claim 2, characterized in that, When the charging power modules are in hibernation and rotating, a first-on, then-off rotation mode is adopted. That is, before the first charging power module is about to enter hibernation, the second charging power module is turned on in advance, and after the second charging power module reaches a stable state, the first charging power module is turned off.

4. A charging system based on a redundant power module of a charging pile according to claim 1, characterized in that: When switching according to the maximum charging operating time, the system automatically switches to the next charging power module to output power, specifically including: Based on the duration data obtained by the monitoring module, the charging power module with the longest sleep time is searched, the charging power module with the longest sleep time is started, and the module that has reached the maximum charging working time through continuous operation is turned off.

5. A charging system based on a redundant power module of a charging pile according to claim 1, characterized in that: The aforementioned status control module can also be set to an automatic rotation mode. In the automatic rotation mode, at predetermined intervals, the system automatically turns on the charging power module with the longest continuous sleep time and turns off the module with the longest continuous working time, so that the working time of the modules is balanced.

6. A charging system based on a redundant power module of a charging pile according to claim 1, characterized in that, It also includes a display configuration module: This display configuration module is used to display the energy-saving status of the charging power module. It can be configured to display locally or in the background, and the relevant parameters can be set locally or in the background.

7. A charging system based on a redundant power module of a charging pile according to claim 1, characterized in that: The status control module allocates an available charging power module to replace the faulty charging power module based on the monitoring data from the fault monitoring module.

8. A method for charging using the charging system according to any one of claims 1-7, characterized in that: After the system is powered on, monitor the operating status of the charging power module; The redundancy switching control module is used to select and switch different charging power modules to output to the charging pile based on the output of the status monitoring module.

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