Storage and charging integrated charging equipment

Abstract

The invention relates to the technical field of new energy charging equipment, and discloses storage and charging integrated charging equipment, which comprises a current sensor, an ACDC power supply module, a control module, a first switch module, a second switch module, an energy storage module and a charging gun module, the control module enables the output power of the charging gun to be the sum of the power of the ACDC power supply module and the power of the energy storage module by switching the on-off of the first switch module and the second switch module, and breaks through the power limitation of a power grid. Meanwhile, the power of the ACDC power module is dynamically adjusted according to the total load of the power grid, and overload is avoided.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of new energy charging equipment, and particularly relates to a storage and charging integrated charging equipment. BACKGROUND

[0002] The traditional direct current charging pile is seriously dependent on power distribution of the power grid, and the premise of realizing so-called fast charging and super charging is that the power grid side must provide alternating current of corresponding power. The alternating current is converted into direct current through an ACDC power module in the direct current charging pile, and then the direct current is output to a new energy electric vehicle. This will cause the following problems: 1. Power limitation problem: The output power of the traditional direct current charging pile is limited by the maximum input power of the power grid side. For example, if the maximum input power provided by the power distribution of the power grid side is 20kW, then even if the output power of the direct current charging pile is 120kW, because of the limitation of the input power of the power grid side, the 120kW direct current pile can only provide a maximum of 20kW of charging service. The disadvantage is that the output performance of the charging pile cannot be fully utilized, which greatly reduces the charging experience. If the capacity of the power distribution is increased, huge investment costs and construction and operation and maintenance work are also increased.

[0003] 2. Overload risk problem: In addition to providing charging piles, the power distribution of the power grid also needs to meet the power demand of other loads (such as lighting, air conditioning, cooking equipment, etc.), which causes the power allocated to the charging pile to fluctuate between 0 and 20kW. Therefore, when 20kW is used for charging service, if other loads (assuming the power is 5kW) start, an overload phenomenon will occur, which will cause power failure or even disasters. In the face of this situation, the traditional direct current charging pile usually sets the input power as a fixed value. The disadvantage of this method is that the input power cannot be dynamically adjusted, and when other loads are not started, the input power obtained by the charging pile is always 15kW. SUMMARY

[0004] Therefore, the present application provides a storage and charging integrated charging equipment to solve the power limitation and overload risk problems of the traditional direct current charging pile.

[0005] The present application provides a storage and charging integrated charging equipment, which comprises a current sensor, an ACDC power module, a control module, a first switch module, a second switch module, an energy storage module and a charging gun module, wherein, The input end of the current sensor is connected with the alternating current of the power grid side, the first output end of the current sensor is connected with the input end of the ACDC power module, the communication end of the current sensor is connected with the first end of the control module, the first output end of the ACDC power module is connected with the input end of the first switch module, and the communication end of the ACDC power module is connected with the second end of the control module; The first output end of the first switch module is connected with the first input end of the charging gun module, the second output end of the first switch module is connected with the input end of the energy storage module, and the communication end of the first switch module is connected with the third end of the control module. The input end of the second switch module is connected with the output end of the energy storage module, the output end of the second switch module is connected with the second input end of the charging gun module, and the communication end of the second switch module is connected with the fourth end of the control module. When the output power of the ACDC power supply module is less than the requested power of the vehicle, the control module controls the first switch module to disconnect the circuit of the energy storage module and close the circuit of the charging gun module, and controls the second switch module to close the circuit of the charging gun module and start the energy storage module to supplement power supply. When the grid side parameter exceeds the first preset threshold, the control module sends a power reduction instruction to the ACDC power supply module to control it to reduce the output power; when the grid side parameter is lower than the first preset threshold, the control module sends a power increase instruction to the ACDC power supply module to control it to increase the output power.

[0006] The application provides a charging device with energy storage and charging functions, a current sensor monitors grid parameters and feeds back to a control module, the control module switches the on-off of a first switch module and a second switch module, so that the output power of a charging gun is the sum of the power of an ACDC power supply module and an energy storage module, and the power limitation of the grid is broken; meanwhile, the power of the ACDC power supply module is dynamically adjusted according to the total load of the grid, and overload is avoided.

[0007] In an optional implementation, the control module is further configured to adjust the charging and discharging logic according to a cloud-side issued energy storage instruction.

[0008] In an optional implementation, the charging and discharging logic comprises: monitoring whether the charging device with energy storage and charging functions is in a vehicle charging state; when the charging device with energy storage and charging functions is not in the vehicle charging state, controlling the first switch module to close the circuit of the energy storage module and disconnect the circuit of the charging gun module, controlling the second switch module to disconnect the circuit of the charging gun module, and starting the ACDC power supply module, so that the charging device with energy storage and charging functions enters an energy storage state; when the charging device with energy storage and charging functions is in the vehicle charging state, after the vehicle charging is completed, returning to the step of monitoring whether the charging device with energy storage and charging functions is in the charging state.

[0009] In an optional implementation, the charging and discharging logic further comprises: monitoring whether a vehicle is connected to the charging device with energy storage and charging functions and is ready to be charged; suspending the ACDC power module if a vehicle is connected to be charged; controlling the first switch module to disconnect the energy storage module and connect the charging gun module, controlling the second switch module to connect the charging gun module, starting the ACDC power module, and making the storage and charging integrated charging device enter a charging state; after the vehicle charging is completed, resuming the energy storage.

[0010] In an optional embodiment, the control module is further configured to adjust the charging and discharging logic according to a peak-valley electricity price period instruction issued by the cloud.

[0011] In an optional embodiment, the charging and discharging logic comprises: if a vehicle is connected to be charged during a valley electricity period, preferentially controlling the ACDC power module to directly take electricity from the grid side to supply power to the vehicle; if the vehicle requested current is greater than the maximum output current of the ACDC power module and the remaining electricity of the energy storage module is greater than a second preset threshold, starting the energy storage module to supplement power supply; if no vehicle is connected to be charged, controlling the ACDC power module to run at full power to charge the energy storage module to a full capacity state.

[0012] In an optional embodiment, the charging and discharging logic further comprises: if a vehicle is connected to be charged during a peak electricity / flat electricity period, preferentially controlling the energy storage module to supply power to the vehicle; if the vehicle requested current is greater than the maximum output current of the energy storage module, starting the ACDC power module to supplement power supply.

[0013] In an optional embodiment, the energy storage module comprises an energy storage battery module and a DCDC power module, wherein, the input end of the energy storage battery module is connected to the second output end of the first switch module, the output end of the energy storage battery module is connected to the input end of the DCDC power module, and the output end of the DCDC power module is connected to the input end of the second switch module.

[0014] In an optional embodiment, the charging and discharging logic further comprises: monitoring the charging request power of the vehicle in real time, and if the charging request power is higher than the total power of the current working module for a plurality of times in succession, determining whether the current is in a peak electricity / flat electricity period; if the current is in a peak electricity / flat electricity period, determining whether there is an idle DCDC power module; if there is an idle DCDC power module, starting the DCDC power module to supply power to the vehicle by the energy storage module; If there is no idle DCDC power module, it is determined whether there is an idle ACDC power module; If there is an idle ACDC power module, the ACDC power module is started, and the vehicle is powered by the grid side.

[0015] In an alternative embodiment, the charging and discharging logic further comprises: If the current is not in the peak / flat power period, it is determined whether there is an idle ACDC power module; If there is an idle ACDC power module, the ACDC power module is started, and the vehicle is powered by the grid side. If there is no idle ACDC power module, it is determined whether there is an idle DCDC power module; If there is an idle DCDC power module, the DCDC power module is started, and the vehicle is powered by the energy storage module.

[0016] In an alternative embodiment, the charging and discharging logic further comprises: If the charging request power is lower than the total power of the current working module for a plurality of times in succession, it is determined whether the current is in the peak / flat power period; If the current is in the peak / flat power period, it is determined whether there is a running ACDC power module; If there is a running ACDC power module, the ACDC power module is controlled to sleep; If there is no running ACDC power module, it is determined whether there is a running DCDC power module; If there is a running DCDC power module, the DCDC power module is controlled to sleep.

[0017] In an alternative embodiment, the charging and discharging logic further comprises: If the current is not in the peak / flat power period, it is determined whether there is a running DCDC power module; If there is a running DCDC power module, the DCDC power module is controlled to sleep; If there is no running DCDC power module, it is determined whether there is a running ACDC power module; If there is a running ACDC power module, the ACDC power module is controlled to sleep. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0019] Figure 1 is a schematic diagram of a storage and charging integrated charging device according to an embodiment of the present application; Figure 2 is a schematic diagram of another storage and charging integrated charging device according to an embodiment of the present application; Figure 3 is a schematic diagram of a power follow-up control process according to an embodiment of the present application; Figure 4 is a schematic diagram of a storage power discharge process according to an embodiment of the present application; Figure 5 is a schematic diagram of another storage and charging integrated charging device according to an embodiment of the present application; Figure 6 is a schematic diagram of a working module number adjustment and regulation process according to an embodiment of the present application; Figure 7 is a schematic diagram of another working module number adjustment and regulation process according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] In order to make the objects, technical solutions and advantages of embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0021] In the description of the present application, it should be noted that the terms “center”, “upper”, “lower”, “left”, “right”, “vertical”, “horizontal”, “inner”, “outer” and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application. In addition, the terms “first”, “second”, “third” are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0022] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms “mounting”, “connection”, “connection” should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements, it can be wireless connection, or wired connection. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0023] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as they do not conflict with each other.

[0024] As shown in the Figure 1 The application provides a storage and charging integrated charging device, which comprises a current sensor, an ACDC power module, a control module, a first switch module, a second switch module, an energy storage module and a charging gun module. The input end of the current sensor is connected with 380V alternating current of a power grid, the first output end of the current sensor is connected with the input end of the ACDC power module, and the communication end of the current sensor is connected with the first end of the control module. The first output end of the ACDC power module is connected with the input end of the first switch module, and the communication end of the ACDC power module is connected with the second end of the control module. The first output end of the first switch module is connected with the first input end of the charging gun module, the second output end of the first switch module is connected with the input end of the energy storage module, and the communication end of the first switch module is connected with the third end of the control module. The input end of the second switch module is connected with the output end of the energy storage module, the output end of the second switch module is connected with the second input end of the charging gun module, and the communication end of the second switch module is connected with the fourth end of the control module. When the parameter of the power grid side exceeds the first preset threshold value, the control module sends a power reduction instruction to the ACDC power module to control the output power to be reduced; when the parameter of the power grid side is lower than the first preset threshold value, the control module sends a power increase instruction to the ACDC power module to control the output power to be increased.

[0025] Specifically, the current sensor is used to collect parameters such as voltage, current, power and harmonic in real time, and transmit the data to the control module. The ACDC power module is used to convert 380V alternating current of the power grid side into direct current, and can adjust the output power according to the instruction of the control module. The first switch module is used to receive the instruction issued by the control module, and realizes the directional distribution of the direct current output by the ACDC power module by switching the on-off state of the circuit itself, which is specifically divided into two power flow modes: mode one, the circuit of the energy storage battery module is disconnected and the circuit of the charging gun module is closed; mode two, the circuit of the energy storage battery module is closed and the circuit of the charging gun module is disconnected. The second switch module is used to control whether the energy storage module supplies power to the charging gun by disconnecting or closing the circuit of the charging gun module. The charging gun module is connected with a new energy vehicle for power supply, and the output power is equal to the sum of the output power of the ACDC power module and the output power of the energy storage module.

[0026] Further, when the output power of the ACDC power module is less than the requested power of the vehicle, the control module controls the first switch module to open the circuit of the energy storage module and close the circuit of the charging gun module, so that all the power of the ACDC power module flows to the charging gun without being shunted to the energy storage module; at the same time, the control module controls the second switch module to close the circuit of the charging gun module, so as to open the path from the energy storage module to the charging gun, start the energy storage module to supply power, and finally realize that the output power of the charging gun = the output power of the ACDC power module + the output power of the energy storage module, break through the power limit of the power grid side, improve the charging speed, and improve the user experience.

[0027] The control module collects the power grid side parameters (such as current, voltage, etc.) transmitted by the current sensor in real time. When the power grid side parameters exceed the first preset threshold, the control module sends a power reduction instruction to the ACDC power module to control it to reduce the output power. For example, assuming that the rated power of the ACDC power module is 80 kW, and the current sensor monitors that the load at the lower end of the power distribution has exceeded the first threshold of 20 kW, the control module will immediately notify the ACDC power module to reduce the power by 20 kW. After receiving the notification, the ACDC power module will reduce the power from 80 kW to 60 kW. Conversely, when the power grid side parameters are lower than the first preset threshold, the control module sends a power increase instruction to the ACDC power module to control it to increase the output power. For example, assuming that the current sensor monitors that the load at the lower end of the power distribution has fallen below the threshold of 20 kW, and at this time the power of the ACDC power module is 50 kW, the control module will immediately notify the ACDC power module to increase the power by 20 kW. After receiving the notification, the ACDC power module will reduce the power from 50 kW to 70 kW. In the embodiment of the application, the first preset threshold is set according to the working condition.

[0028] The application provides a charging device with integrated storage and charging. The current sensor monitors the power grid parameters and feeds back to the control module. The control module switches the first switch module and the second switch module to make the output power of the charging gun the sum of the power of the ACDC power module and the power of the energy storage module, break through the power limit of the power grid, realize high output under low input of the power grid, improve charging efficiency, and shorten the charging time of the vehicle. At the same time, the power of the ACDC power module is dynamically adjusted according to the total load of the power grid to avoid overload, ensure power safety, and avoid waste of transformer power.

[0029] In an optional embodiment, as shown in Figure 2 The energy storage module includes an energy storage battery module and a DCDC power module. The input end of the energy storage battery module is connected with the second output end of the first switch module, the output end of the energy storage battery module is connected with the input end of the DCDC power module, and the output end of the DCDC power module is connected with the input end of the second switch module.

[0030] Specifically, the energy storage battery module is used to store the direct current converted by the AC-DC power module. The DC-DC power module is used to convert the unstable direct current output by the energy storage battery module into a constant current / constant voltage direct current that meets the charging requirements of new energy vehicles, and can adjust the output power according to the control module instructions.

[0031] In an optional implementation, the grid-side load constraint and dynamic power adaptive regulation system are designed as follows: The grid-side transformer outputs 380V alternating current with a rated power of Pt, and two types of loads are connected to the lower end: the integrated charging and energy storage device (rated input power Pp) and other electrical loads (input power Po). The system operation must strictly follow the core constraint inequality: Pp + Po < Pt.

[0032] If Pp + Po ≥ Pt, it will directly trigger the risk of grid overload. In the light case, it will trigger the protection mechanism, resulting in tripping and power outage, affecting normal power consumption; in the severe case, it will cause overheating due to long-term overloading of the line, posing a potential risk of electrical fire.

[0033] Affected by the characteristics of users' electricity consumption behavior, the power Po of other loads has significant time-varying characteristics, which leads to two typical contradictions: (1) Peak load scenario: Scenarios such as concentrated lighting at night, the start-up of air conditioner clusters in summer, and the operation of high-power kitchen utensils during the three meals will cause Po to rise significantly in a short period of time. If the integrated charging and energy storage device maintains the original power Pp unchanged, it is very easy to have the situation of Pp + Po > Pt, breaking through the safety constraint and triggering the aforementioned overload risk.

[0034] (2) Valley load scenario: When Po decreases (such as the shutdown of night lighting and air conditioners), if the integrated charging and energy storage device still maintains the previously reduced Pp to avoid overload, it will cause Pp + Po to be much less than Pt, resulting in the idle capacity of the transformer.

[0035] To resolve the above contradictions, a power following control system based on real-time monitoring is designed to achieve two-way optimization through the following mechanisms: As Figure 3 shown, a current sensor is deployed at the output end of the transformer to collect the total load power Pp + Po in real time; after receiving the sensor data, the control module dynamically adjusts the power of the AC / DC power module of the integrated charging and energy storage device to make Pp and Po form a dynamic match.

[0036] Overload prevention: When it is detected that Pp + Po > P (where P is the preset safety threshold and P is much less than Pt), the control module immediately issues a power reduction instruction to the AC / DC power module, adjusting Pp to Pp = P - Po to ensure Pp + Po < Pt and avoiding the overload risk from the source.

[0037] Energy efficiency improvement: When Pp+Po<P is monitored, the control module issues a power-up instruction to the AC / DC power module to increase Pp to Pp=P-Po, making full use of the transformer's redundant capacity and avoiding resource idleness while strictly meeting the condition Pp+Po<Pt.

[0038] Seamless switching: By optimizing the instruction transmission and module response mechanism, the system achieves fast response (<200ms) of power regulation, completely solving the problem of supply-demand imbalance lag in the traditional manual adjustment mode and ensuring power continuity.

[0039] Specific embodiments take a transformer with a rated power Pt=100kW as an example, and the system operation process is as follows: Normal scenario: no concentrated lighting during the day, other loads Po=0kW, and the current sensor monitors Pp+Po=80kW<P (preset P=90kW), and the control module allows the AC / DC power module to run at full power of 80kW, making full use of the transformer capacity.

[0040] Peak load scenario: turn on lighting and other equipment at night, Po=30kW, if the AC / DC still runs at 80kW, the total load will reach 110kW (>100kW). At this time, the current sensor captures Pp+Po=110kW>P in real time, and the control module immediately instructs the AC / DC to reduce the power to 70kW, so that the total load is reduced to below 100kW (70kW+30kW=100kW), meeting the safety constraint.

[0041] Valley recovery scenario: turn off the lighting at night, Po=0kW, and the sensor monitors Pp+Po=70kW<P, and the control module instructs the AC / DC to increase the power to 80kW, and the total load returns to 80kW, re-implementing efficient use of transformer capacity.

[0042] In an alternative embodiment, the control module is also configured to adjust the charge-discharge logic according to the storage instruction issued by the cloud.

[0043] Specifically, the charge-discharge logic includes: Step S11, monitoring whether the integrated charging device is in a vehicle charging state.

[0044] Step S12, when the integrated charging device is not in a vehicle charging state, controlling the first switch module to close the circuit of the energy storage module and open the circuit of the charging gun module, controlling the second switch module to open the circuit of the charging gun module, starting the ACDC power module, and the integrated charging device enters the storage state.

[0045] Step S13, when the charging device is in the vehicle charging state, after the vehicle charging is completed, return to the step of monitoring whether the charging device is in the charging state.

[0046] Step S14, monitor whether a vehicle is connected to the charging device and is ready to be charged.

[0047] Step S15, if a vehicle is connected and is ready to be charged, suspend the ACDC power module.

[0048] Step S16, control the first switch module to disconnect the circuit of the energy storage module and close the circuit of the charging gun module, control the second switch module to close the circuit of the charging gun module, start the ACDC power module, and the charging device enters the charging state.

[0049] Step S17, after the vehicle charging is completed, recharge.

[0050] In the embodiment of the application, the cloud platform issues a recharging instruction to the device according to the power grid load, the energy storage module power and other requirements. After receiving the instruction, the control module determines whether the device is currently charging a vehicle through the signal feedback of the charging gun module. If the control module determines that the device is currently charging a vehicle, it continues to track the charging process, and after the charging is completed, returns to step S11 to determine whether it is in the charging state. If the control module determines that the device is not in the vehicle charging state, it controls the first switch module to close the circuit of the ACDC power module→the energy storage module, and disconnect the circuit of the ACDC power module→the charging gun module, so that all the power of the ACDC power module is used for recharging, and no power is diverted to the idle charging gun; the control module controls the second switch module to disconnect the circuit of the energy storage module→the charging gun module, so as to prevent the energy storage module from discharging to the charging gun during the recharging process, and ensure the recharging efficiency.

[0051] The control module captures in real time whether a new vehicle needs to be charged through the access signal of the charging gun module. If the control module monitors that a new vehicle needs to be charged, the control module issues a suspension instruction to the ACDC power module to temporarily stop the power supply to the energy storage module. Then, the control module controls the first switch module to disconnect the circuit of the ACDC power module→the energy storage module and close the circuit of the ACDC power module→the charging gun module, and controls the second switch module to close the circuit of the energy storage module→the charging gun module to restore the power output and supply direct current to the charging gun module. After the vehicle charging is completed, the control module drives the device to exit the charging mode and re-executes step S12 to continue to complete the recharging task issued by the cloud. The recharging and discharging flowchart is shown in FIG. 4. Figure 4 .

[0052] In an optional embodiment, the control module is further configured to adjust the charging and discharging logic according to the peak-valley electricity price period instruction issued by the cloud.

[0053] Specifically, the charging and discharging logic comprises: In step S21, if a vehicle is charging during the valley power period, the ACDC power module is controlled to directly take power from the power grid side to supply power to the vehicle.

[0054] In step S22, if the current requested by the vehicle is greater than the maximum output current of the ACDC power module and the remaining power of the energy storage module is greater than a second preset threshold, the energy storage module is started to supply power.

[0055] In step S23, if there is no vehicle charging, the ACDC power module is controlled to run at full power to charge the energy storage module to a full capacity state.

[0056] In step S24, if a vehicle is charging during the peak / flat power period, the energy storage module is controlled to supply power to the vehicle.

[0057] In step S25, if the current requested by the vehicle is greater than the maximum output current of the energy storage module, the ACDC power module is started to supply power.

[0058] In the embodiment of the application, the cloud platform issues power period instructions or peak / flat power period instructions to the device according to the local power grid peak valley price policy. When the cloud issues valley power period instructions and the control module detects that a vehicle is connected for charging, the ACDC power module is preferentially issued a start instruction to directly take 380V alternating current from the power grid side, convert it into direct current, and then deliver it to the charging gun module to supply power to the vehicle. If the charging current requested by the vehicle is greater than the maximum output current of the ACDC power module (for example, the vehicle requires 160A and the ACDC power module can only output 80A), and the control module detects that the remaining power (SOC) of the energy storage module is greater than a second preset threshold, a closing instruction is immediately issued to the second switch module to start the energy storage module to output direct current through the DCDC power module, which is superimposed with the output of the ACDC power module to jointly meet the current demand of the vehicle. When the cloud issues valley power period instructions and the control module detects that no vehicle is connected, a full power running instruction is issued to the ACDC power module, and the first switch module is controlled to close the energy storage module circuit and open the charging gun module circuit, and the second switch module is controlled to open the charging gun module circuit, so that all the direct current output by the ACDC power module is delivered to the energy storage module until the energy storage module reaches a full capacity state (SOC=100%).

[0059] When the cloud issues a peak / flat electricity period instruction, and the control module detects that a vehicle accesses charging, a closing instruction is issued to the second switch module to start the energy storage module to output direct current through the DCDC power module to supply power to the vehicle; at the same time, the first switch module is controlled to be disconnected to avoid the ACDC to take power from the power grid. If the charging request current of the vehicle is greater than the maximum output current of the energy storage module (for example, the vehicle needs 200A, and the energy storage can only output 120A through the DCDC power module), the control module immediately issues a start instruction to the ACDC power module, and at the same time, the first switch module is controlled to be closed to connect the charging gun module circuit, so that the ACDC power module takes power from the power grid to convert into direct current, which is superimposed with the output of the energy storage module to meet the current demand of the vehicle. The peak-valley electricity price difference is used to store and discharge electricity to reduce the charging cost and improve the operation income of the equipment. In the embodiment of the application, the second preset threshold is set according to the working condition.

[0060] In an alternative embodiment, the charge and discharge logic further comprises: Step S31, the charging request power of the vehicle is monitored in real time, and if the charging request power is higher than the total power of the current working module for a plurality of times, it is judged whether the current is in a peak / flat electricity period.

[0061] Step S32, if the current is in a peak / flat electricity period, it is judged whether there is an idle DCDC power module.

[0062] Step S33, if there is an idle DCDC power module, the DCDC power module is started to supply power to the vehicle by the energy storage module.

[0063] Step S34, if there is no idle DCDC power module, it is judged whether there is an idle ACDC power module.

[0064] Step S35, if there is an idle ACDC power module, the ACDC power module is started to supply power to the vehicle by the power grid side.

[0065] Step S36, if the current is not in a peak / flat electricity period, it is judged whether there is an idle ACDC power module.

[0066] Step S37, if there is an idle ACDC power module, the ACDC power module is started to supply power to the vehicle by the power grid side.

[0067] Step S38, if there is no idle ACDC power module, it is judged whether there is an idle DCDC power module.

[0068] Step S39, if there is an idle DCDC power module, the DCDC power module is started to supply power to the vehicle by the energy storage module.

[0069] Specifically, as Figure 5As shown, the ACDC power module and the DCDC power module are configured in multiple, and the number can be increased or decreased according to the actual power demand, and is suitable for different scene requirements. The charging gun module includes at least two independent charging guns: charging gun A and charging gun B. Each charging gun is configured with an independent charging switch module, which is controlled by the control module to turn on and off, so as to realize simultaneous or independent charging of multiple vehicles.

[0070] The control module is also used to adjust the number of working modules according to the charging request power. If the charging request power is higher than the total power of the current working modules for a plurality of times in succession, the number of working ACDC power modules or DCDC power modules is increased. If the charging request power is lower than the total power of the current working modules for a plurality of times in succession, the number of working ACDC power modules or DCDC power modules is reduced. For specific adjustment process, see Figure 6 and Figure 7 As shown in Figure 6 , the control module collects the charging request power sent by the vehicle in real time, and counts whether the request power is higher than the total power of the current working modules for a plurality of times in succession. If yes, it is further judged whether the current is in the peak / flat power period. The number of request powers is taken as an example of 5 times, and the total power of the previous working module = the output power of the ACDC power module + the output power of the DCDC power module. If the current is in the peak / flat power period, the control module first queries whether there is an idle DCDC power module that is not running (for example, the device is configured with 3 DCDC, and currently only 1 is working, and the remaining 2 are idle). If there is an idle DCDC power module, the control module issues a start instruction to the module, and after starting, the energy storage module outputs direct current through DCDC, and the power of the existing working module is superimposed to meet the vehicle charging request power. If all DCDC power modules are in the running state, the control module turns to query whether there is an idle ACDC power module. If there is an idle ACDC power module, the control module starts the module to take power from the grid side, and after conversion by the ACDC power module, it supplements the power supply to meet the charging power demand.

[0071] If the current is in the valley power period, the control module first queries whether there is an idle ACDC power module that is not running. If there is an idle ACDC power module, the control module starts the module to directly take 380V alternating current from the grid side, converts it into direct current, and supplements the power supply to meet the vehicle request power. If all ACDC power modules are in the running state, the control module turns to query whether there is an idle DCDC power module. If there is an idle DCDC power module, the control module starts the module, and the energy storage module outputs direct current to supplement the power supply to meet the charging power demand.

[0072] In a specific embodiment, three DC / DC modules and two AC / DC modules are configured in the storage and charging pile. The power of the DC / DC module is 40 kW, the power of the AC / DC module is 40 kW, and the total power is 200 kW. The charging is performed in the valley power period, the AC / DC module is preferentially used, and the DC / DC module is used as power compensation. The power dynamic allocation is shown in Table 1. Table 1 Dynamic allocation table of charging power in valley power period

[0073] The charging is performed in the peak power / flat power period, the DC / DC module is preferentially used, and the AC / DC module is used as power compensation. The power dynamic allocation is shown in Table 2. Table 2 Dynamic allocation table of charging power in peak power / flat power period

[0074] In an optional embodiment, the charging and discharging logic further comprises: In step S41, if the charging request power is lower than the total power of the current working module for a plurality of times, it is determined whether the current is in the peak power / flat power period.

[0075] In step S42, if the current is in the peak power / flat power period, it is determined whether there is a running ACDC power module.

[0076] In step S43, if there is a running ACDC power module, the ACDC power module is controlled to sleep.

[0077] In step S44, if there is no running ACDC power module, it is determined whether there is a running DCDC power module.

[0078] In step S45, if there is a running DCDC power module, the DCDC power module is controlled to sleep.

[0079] In step S46, if the current is not in the peak power / flat power period, it is determined whether there is a running DCDC power module.

[0080] In step S47, if there is a running DCDC power module, the DCDC power module is controlled to sleep.

[0081] In step S48, if there is no running DCDC power module, it is determined whether there is a running ACDC power module.

[0082] In step S49, if there is a running ACDC power module, the ACDC power module is controlled to sleep.

[0083] Specifically, in Figure 7In the flowchart shown, the charging request power is less than the total power of the current working module minus 40kW for 5 times in succession as an example. The control module collects the charging request power sent by the vehicle in real time, and counts whether the charging request power is less than the total power of the current working module minus 40kW for 5 times in succession; if yes, it is further judged whether the current is in the peak / flat power period; if yes, the control module first queries whether there is a running ACDC power module. If there is a running ACDC power module, the control module issues a hibernation instruction to one of them (such as reducing from 2 ACDC power modules to 1, and the total power from 80kW to 40kW), so that the total power of the working module matches the charging request power (such as the vehicle requesting 100kW, the original total power being 160kW, and after hibernating one ACDC power module, the total power being 120kW, which is close to the demand). If all the ACDC power modules have been hibernated, the control module turns to query whether there is a running DCDC power module. If there is a running DCDC, the control module hibernates one of them (such as reducing from 3 to 2, and the total power from 120kW to 80kW), and matches the charging request power.

[0084] If the current is in the valley power period, the control module first queries whether there is a running DCDC power module. If there is a running DCDC power module, the control module issues a hibernation instruction to one of them, so that the total power of the working module matches the charging request power. If all the DCDC power modules have been hibernated, the control module turns to query whether there is a running ACDC power module. If there is a running ACDC power module, the control module hibernates one of them, and matches the charging request power.

[0085] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A storage and charging integrated charging device, characterized in that, The application relates to a charging device for a vehicle, which comprises a current sensor, an ACDC power module, a control module, a first switch module, a second switch module, an energy storage module and a charging gun module, wherein, an input end of the current sensor is connected with an AC power grid, a first output end of the current sensor is connected with an input end of the ACDC power module, a communication end of the current sensor is connected with a first end of the control module, a first output end of the ACDC power module is connected with an input end of the first switch module, and a communication end of the ACDC power module is connected with a second end of the control module; a first output end of the first switch module is connected with a first input end of the charging gun module, a second output end of the first switch module is connected with an input end of the energy storage module, and a communication end of the first switch module is connected with a third end of the control module; an input end of the second switch module is connected with an output end of the energy storage module, an output end of the second switch module is connected with a second input end of the charging gun module, and a communication end of the second switch module is connected with a fourth end of the control module; when the output power of the ACDC power module is smaller than the requested power of the vehicle, the control module controls the first switch module to disconnect the circuit of the energy storage module and close the circuit of the charging gun module, and controls the second switch module to close the circuit of the charging gun module, and starts the energy storage module to supply power; when the grid-side parameter exceeds a first preset threshold value, the control module sends a power reduction instruction to the ACDC power module to control the ACDC power module to reduce the output power; and when the grid-side parameter is lower than the first preset threshold value, the control module sends a power increase instruction to the ACDC power module to control the ACDC power module to increase the output power. The control module is further used for adjusting the charging and discharging logic according to a power storage instruction issued by a cloud end.

2. The integrated charging device according to claim 1, wherein The charging and discharging logic comprises the following steps:

3. The integrated charging device according to claim 2, wherein monitoring whether the integrated charging and energy storage device is in a vehicle charging state; when the integrated charging and energy storage device is not in the vehicle charging state, controlling the first switch module to close the circuit of the energy storage module and disconnect the circuit of the charging gun module, controlling the second switch module to disconnect the circuit of the charging gun module, starting the ACDC power module, and making the integrated charging and energy storage device enter a power storage state; when the integrated charging and energy storage device is in the vehicle charging state, returning to the step of monitoring whether the integrated charging and energy storage device is in the charging state after the vehicle charging is completed. The charging and discharging logic further comprises the following steps:

4. The integrated charging device according to claim 3, wherein monitoring whether a vehicle is connected to the integrated charging and energy storage device and is ready to be charged; if the vehicle is connected and is ready to be charged, suspending the ACDC power module; controlling the first switch module to disconnect the circuit of the energy storage module and close the circuit of the charging gun module, controlling the second switch module to close the circuit of the charging gun module, starting the ACDC power module, and making the integrated charging and energy storage device enter a charging state; after the vehicle charging is completed, resuming power storage. The control module is further used for adjusting the charging and discharging logic according to a peak-valley electricity price period instruction issued by a cloud end.

5. The integrated charging device according to claim 1, wherein The charging and discharging logic comprises the following steps:

6. The integrated charging device according to claim 2, wherein ​ If there is a vehicle charging during the valley power period, the ACDC power module is controlled to directly take power from the grid side to supply power to the vehicle; If the vehicle requests current is greater than the maximum output current of the ACDC power module and the remaining power of the energy storage module is greater than the second preset threshold, the energy storage module is started to supply power; If there is no vehicle charging, the ACDC power module is controlled to run at full power to charge the energy storage module to the full capacity state.

7. The integrated charging device according to claim 6, wherein The charge-discharge logic further comprises: If there is a vehicle charging during the peak / flat power period, the energy storage module is controlled to supply power to the vehicle; If the vehicle requests current is greater than the maximum output current of the energy storage module, the ACDC power module is started to supply power.

8. The integrated charging device according to claim 2 or 5, wherein The energy storage module comprises an energy storage battery module and a DCDC power module, wherein, The input end of the energy storage battery module is connected with the second output end of the first switch module, the output end of the energy storage battery module is connected with the input end of the DCDC power module, and the output end of the DCDC power module is connected with the input end of the second switch module.

9. The integrated charging device according to claim 8, wherein The charge-discharge logic further comprises: The charge request power of the vehicle is monitored in real time, and if the charge request power is higher than the total power of the current working module for a plurality of times, it is judged whether the current is in the peak / flat power period; If the current is in the peak / flat power period, it is judged whether there is an idle DCDC power module; If there is an idle DCDC power module, the DCDC power module is started to supply power to the vehicle by the energy storage module; If there is no idle DCDC power module, it is judged whether there is an idle ACDC power module; If there is an idle ACDC power module, the ACDC power module is started to supply power to the vehicle by the grid side.

10. The integrated charging device according to claim 9, wherein The charge-discharge logic further comprises: If the current is not in the peak / flat power period, it is judged whether there is an idle ACDC power module; If there is an idle ACDC power module, the ACDC power module is started to supply power to the vehicle by the grid side; If there is no idle ACDC power module, it is judged whether there is an idle DCDC power module; If there is an idle DCDC power module, the DCDC power module is started to supply power to the vehicle by the energy storage module.

11. The integrated charging device according to claim 9, wherein The charge-discharge logic further comprises: If the charge request power is lower than the total power of the current working module for a plurality of times, it is judged whether the current is in the peak / flat power period; If the current is in the peak / flat power period, it is judged whether there is a running ACDC power module; If there is a running ACDC power module, the ACDC power module is controlled to sleep; If there is no running ACDC power module, it is judged whether there is a running DCDC power module; If there is a running DCDC power module, the DCDC power module is controlled to sleep.

12. The integrated charging device of claim 11, wherein, The charge-discharge logic further comprises: If the current is not in the peak / flat power period, it is judged whether there is a running DCDC power module; If there is a running DCDC power module, the DCDC power module is controlled to sleep; If there is no running DCDC power module, it is judged whether there is a running ACDC power module; If there is a running ACDC power module, the ACDC power module is controlled to sleep.

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