Direct current storage and charging system

Abstract

The utility model discloses a direct current storage and charging system. A battery pack including a plurality of batteries PACK; one side of the high-voltage box is connected with the battery pack, and the other side of the high-voltage box is connected with a direct-current output charging gun; and one side of the MPP1 module is connected with a photovoltaic PV, the other side of the MPP1 module is connected with the other side of the high-voltage box, and the MPP1 module is used for charging the battery pack after being started.

Description

Technical Field

[0001] The utility model relates to the field of electric vehicle charging, in particular to a DC storage and charging system. Background Art

[0002] The existing electric vehicle charging battery has a single way to supplement the lack of energy. Generally, it takes power from the power grid, which is inconvenient to move and the energy cannot be well utilized. Summary of the Utility Model

[0003] To solve the above problems, the technical solution provides a DC storage and charging system.

[0004] To achieve the above object, the technical solution is as follows:

[0005] A DC storage and charging system includes:

[0006] A battery pack, which includes a plurality of battery PACKs;

[0007] A high-voltage box, one side of which is connected to the battery pack, and the other side is connected to a DC output charging gun;

[0008] An MPP1 module, one side of which is connected to a photovoltaic PV, and the other side is connected to the other side of the high-voltage box. After being turned on, it is used to charge the battery pack.

[0009] In some embodiments, a plurality of DC / DC conversion modules are provided between the DC output charging gun and the high-voltage box.

[0010] In some embodiments, a charger is further included. The positive input terminal of the charger is sequentially connected to a DC input charging gun through a contactor KM5 and a contactor KM3. The contactor KM3 is also connected to the high-voltage box;

[0011] The AC end of the charger is respectively connected to the commercial power and an AC input charging gun.

[0012] In some embodiments, the MPP1 module is also connected to a wind power generator.

[0013] The beneficial effect of this application is:

[0014] This application has multiple charging modes for the battery, can make full use of a variety of energies, and is equipped with multiple charging modes for electric vehicles, which is convenient for users to choose. Description of the Drawings

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for the description of the embodiments.

[0016] Figure 1 It is a schematic structural diagram of Embodiment 1 of the embodiments of the present utility model;

[0017] Figure 2 It is the schematic structural diagram of the second embodiment of the embodiments of the present utility model. Specific implementation manners

[0018] In order to make the technical problems, technical solutions and beneficial effects solved by the present utility model clearer, the present utility model will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present utility model and are not used to limit the present utility model.

[0019] Please refer to Figure 1 As shown, a DC storage and charging system includes:

[0020] A battery pack, which includes a plurality of battery PACKs;

[0021] A high-voltage box, one side of which is connected to the battery pack and the other side is connected to a DC output charging gun;

[0022] An MPP1 module, one side of which is connected to a photovoltaic PV and the other side is connected to the other side of the high-voltage box, and is used to charge the battery pack after being turned on.

[0023] Specifically, a plurality of DC / DC conversion modules are provided between the DC output charging gun and the high-voltage box.

[0024] Specifically, a charger is further included. The positive input terminal of the charger is sequentially connected to a DC input charging gun through a contactor KM5 and a contactor KM3, and the contactor KM3 is also connected to the high-voltage box;

[0025] The AC end of the charger is respectively connected to the commercial power and an AC input charging gun.

[0026] The specific working mode is as follows:

[0027] This DC storage and charging system includes a cluster of batteries, which includes several battery packs, and the battery system is connected through a high-voltage box;

[0028] It includes two sections of busbars, a busbar for positive current collection and a busbar for negative current collection.

[0029] The battery charging system includes an AC input charging gun interface, a direct input interface for commercial power, a DC input charging gun interface, a photovoltaic panel and a photovoltaic MPPT, as well as a DC charging contactor KM3 and an AC charging contactor KM5.

[0030] The vehicle charging system includes several bidirectional charging modules DCDC and multiple DC output charging guns.

[0031] Considering the high efficiency of electric vehicle charging, only fast charging guns are set in this system to charge electric vehicles; electric vehicles obtain power from the DC bus through DC output charging guns, which greatly improves the charging efficiency and charging convenience. Electric vehicles can also charge the battery in reverse through the bi-directional charging module.

[0032] This system can be moved. It can be moved at any time through transportation tools such as trucks. The exposed photovoltaic panels generate electricity during transportation to charge the battery. In addition, the transportation tools can also be charged through this device to maintain the vehicle's endurance.

[0033] The photovoltaic capacity of this system can be expanded. When the system moves to a photovoltaic shed area, the photovoltaic power generation can be enhanced, quickly charging the battery and improving the vehicle's endurance for transportation tools.

[0034] The system operation modes are as follows:

[0035] 1. Maximum self-use mode

[0036] In this working mode, when the photovoltaic array has sufficient energy, the photovoltaic energy will supply power to the electric vehicle and the battery in the order of the electric vehicle first and the battery second. (The DC input charging gun, AC input charging gun, and mains interface do not participate in power supply.) When the photovoltaic array has insufficient energy, the battery discharges to supply power to the electric vehicle.

[0037] 2. V2G mode

[0038] In this working mode, the electric vehicle can charge the battery through the electric vehicle bi-directional charging module.

[0039] 3. DC input charging gun charging mode

[0040] In this working mode, when the battery has a low charge, the battery is charged with high power by connecting to the fast charging gun.

[0041] 4. AC input charging gun charging mode

[0042] In this working mode, when the battery has a low charge, the battery is charged with low power by connecting to the slow charging gun.

[0043] 5. Mains charging mode

[0044] In this working mode, when the battery has a low charge, the battery is directly charged with low power through the mains interface.

[0045] System operation principle:

[0046] 1. Maximum self-use mode

[0047] In this working mode, the high-voltage box controls the contactor to close. At this time, the photovoltaic panel generates electricity and charges the battery through the MPPT module, and can also charge the electric vehicle. At this time, in order to prevent the DC input charging gun, AC input charging gun and mains interface from being electrified, the DC charging contactor KM3 and the AC charging contactor KM5 remain disconnected.

[0048] 2. V2G Mode

[0049] In this working mode, the electric vehicle can charge the battery through the electric vehicle bi-directional charging module.

[0050] 3. DC Input Charging Gun Charging Mode

[0051] In this working mode, when the battery power is low, the DC charging contactor KM3 controls to close, and the AC charging contactor KM5 remains disconnected. The battery charges the battery with high power by connecting to the fast charging gun.

[0052] 4. AC Input Charging Gun Charging Mode

[0053] In this working mode, when the battery power is low, the DC charging contactor KM3 remains disconnected, and the AC charging contactor KM5 remains closed. The battery charges the battery with low power by connecting to the slow charging gun.

[0054] 5. Mains Charging Mode

[0055] In this working mode, when the battery power is low, the DC charging contactor KM3 remains disconnected, and the AC charging contactor KM5 remains closed. The battery directly charges the battery with low power through the mains interface.

[0056] System Operating Modes:

[0057] 1. Maximum Self-Consumption Mode

[0058] In this working mode, the high-voltage box controls the contactor to close, and the DC charging contactor KM3 and the AC charging contactor KM5 remain disconnected. At this time, the photovoltaic panel can generate electricity and charge the battery through the MPPT module, and can also charge the electric vehicle.

[0059] When the output power of the photovoltaic array is 80 kW and an electric vehicle needs to be charged with a request of 40 kW, the photovoltaic energy charges the electric vehicle with 40 kW. The current SOC of the battery system is 50%, and the battery is charged with 40 kW. It meets the requirement that the photovoltaic energy supplies power to the electric vehicle and the battery in the order of the electric vehicle first and the battery second.

[0060] When the output power of the photovoltaic array is 40 kW and an electric vehicle needs to be charged with a request of 50 kW, the photovoltaic energy charges the electric vehicle with 40 kW. The current SOC of the battery system is 90%, and the battery charges the electric vehicle with 10 kW.

[0061] 2. V2G Mode

[0062] In this working mode, an electric vehicle connects to the charging gun. The current SOC is 90%, and the available power is 215 kWh. By setting it to the power selling mode of the storage charging station, the power selling stops when the SOC reaches 20%. If it is in the time period of selling power to the grid, the bi-directional charging module of this electric vehicle supplies 50 kW of power to the battery, and the revenue is settled according to the electricity quantity.

[0063] 3. DC Input Charging Gun Power Supply Mode

[0064] In this working mode, when the battery power is low, the DC charging contactor KM3 is controlled to close, and the AC charging contactor KM5 remains open. The battery is supplied with power at 120 kW through the connected fast charging gun.

[0065] 4. AC Input Charging Gun Power Supply Mode

[0066] In this working mode, when the battery power is low, the DC charging contactor KM3 remains open, and the AC charging contactor KM5 remains closed. The battery is supplied with power at a low power of 7 kW through the connected slow charging gun.

[0067] 5. Mains Power Supply Mode

[0068] In this working mode, when the battery power is low, the DC charging contactor KM3 remains open, and the AC charging contactor KM5 remains closed. The battery is directly supplied with power at a low power of 7 kW through the mains power interface.

[0069] Example 2, referring to the appendix Figure 2 , the MPP1 module is also connected to the wind power generator. Specifically, it includes a cluster of batteries, which contains several battery packs, and the battery system is connected through the high-voltage box control;

[0070] It includes two sections of busbars, the busbar for positive current collection and the busbar for negative current collection.

[0071] The battery charging system includes an AC input charging gun interface, a mains direct input interface, a DC input charging gun interface, as well as a photovoltaic panel and a photovoltaic MPPT, and a DC charging contactor KM3 and an AC charging contactor KM5.

[0072] The vehicle charging system includes several bi-directional charging modules DCDC and multiple DC output charging guns.

[0073] Considering the high efficiency of electric vehicle charging, only fast charging guns are set in this system to charge electric vehicles; the electric vehicle obtains power from the DC bus through the DC output charging gun, which greatly improves the charging efficiency and the charging convenience is strong. The electric vehicle can also charge the battery in reverse through the bi-directional charging module.

[0074] The system can be moved and can be moved at any time by means of transportation tools such as trucks. The photovoltaic panels are exposed and can generate electricity during transportation to charge the battery. In addition, the transportation tools can also be charged through this device to maintain the vehicle's endurance.

[0075] The photovoltaic power of the system can be expanded. When the system moves to a photovoltaic shed area, the photovoltaic power generation can be enhanced, the battery can be quickly charged, and the vehicle endurance of the transportation tools can also be improved.

[0076] The system is compared with Figure 1 the system in terms of expanding wind power access. When it moves to a wind power generation area, it can generate electricity to charge the battery. In addition, the transportation tools can also be charged through this device to maintain the vehicle's endurance.

[0077] The wind power of the system can be expanded. When the system moves to a wind power area, the wind power generation can be enhanced, the battery can be quickly charged, and the vehicle endurance of the transportation tools can also be improved.

[0078] The above are only the preferred embodiments of this application and are not used to limit the scope of implementation of this application. All those whose principles and basic structures are the same as or similar to those of this application are within the protection scope of this application.

Claims

1. A DC storage and charging system, characterized in that: include; A battery pack, comprising a plurality of battery PACKs; A high-voltage box, one side of which is connected to the battery pack, and the other side of which is connected to a DC output charging gun; The MPP1 module has one side connected to the photovoltaic PV and the other side connected to the other side of the high-voltage box, and is used to charge the battery pack after being turned on.

2. A DC storage and charging system according to claim 1, characterized in that: A plurality of DC / DC conversion modules are arranged between the DC output charging gun and the high voltage box.

3. A DC storage and charging system according to claim 1, characterized in that: It also includes a charger, the positive input end of which is connected to a DC input charging gun through contactor KM5 and contactor KM3 in sequence, and the contactor KM3 is also connected to the high-voltage box; The AC end of the charger is connected to the mains and the AC input charging gun respectively.

4. A DC storage and charging system according to claim 1, characterized in that: The MPP1 module is also connected to a wind turbine generator.

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