阅读说明：本技术 一种交流充电桩v2g系统及方法 (Alternating current charging pile V2G system and method ) 是由 黄志明 李加进 吴贶 于 2021-07-29 设计创作，主要内容包括：本发明提供的交流充电桩V2G系统及方法,包括交流充电桩和车联平台；交流充电桩用于给新能源汽车充电或反向回电；新能源汽车包括双向OBC模块；车联平台包括电网回电模式和家用储电模式；电网回电模式指新能源汽车通过双向OBC模块反向放电给交流充电桩,交流充电桩将电回传给电网；家用储电模式指新能源汽车通过双向OBC模块反向放电给交流充电桩,交流充电桩将电存储到家用储电设备。本发明基于交流充电桩实现V2G,功率较小,更适用于地域分散,电力维稳困难的地区进行家庭储电,适用范围更广。且实现了合理调度电能,提高了资源的利用率,避免了资源的浪费。(The invention provides an alternating current charging pile V2G system and a method thereof, comprising an alternating current charging pile and a vehicle-connected platform; the alternating current charging pile is used for charging the new energy automobile or reversely returning electricity; the new energy automobile comprises a bidirectional OBC module; the vehicle-mounted platform comprises a power grid return mode and a household power storage mode; the power grid return mode means that the new energy automobile reversely discharges electricity to the alternating-current charging pile through the bidirectional OBC module, and the alternating-current charging pile returns the electricity to the power grid; the household electricity storage mode means that the new energy automobile reversely discharges electricity to the alternating-current charging pile through the bidirectional OBC module, and the alternating-current charging pile stores the electricity to the household electricity storage equipment. The invention realizes V2G based on the AC charging pile, has smaller power, is more suitable for household electricity storage in areas with dispersed regions and difficult power maintenance, and has wider application range. And reasonable electric energy scheduling is realized, the utilization rate of resources is improved, and the waste of resources is avoided.)

1. The alternating current charging pile V2G system is characterized by comprising an alternating current charging pile and a vehicle-connected platform; the alternating current charging pile is used for charging the new energy automobile, or reversely returning electricity to a power grid, or reversely supplying electricity to a family; the new energy automobile is provided with a bidirectional OBC module; the vehicle-mounted platform comprises a reverse charging mode, and the reverse charging mode comprises a power grid return mode and a household power storage mode; the power grid return mode refers to the situation that the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module, and the alternating current charging pile returns the electricity to a power grid; the household electricity storage mode means that the new energy automobile passes through the bidirectional OBC module reverse discharge gives the alternating-current charging pile, the alternating-current charging pile stores electricity to household electricity storage equipment or directly supplies power to household appliances.

2. The ac charging pile V2G system of claim 1, wherein the new energy vehicle further comprises an on-board battery management system; and the vehicle-mounted battery management system transmits the battery real-time state parameters of the new energy automobile to the vehicle-connected platform and is used for judging whether the new energy automobile is in a reverse chargeable state or not.

3. The ac charging post V2G system of claim 1, further comprising a stake-coupled platform; the train connection platform is in communication connection with the pile connection platform and is used for sending charging mode information to the pile connection platform; the alternating current charging pile is provided with a control module, a first reverse output end, a second reverse output end and a transformer; the first reverse output end and the second reverse output end are respectively connected with the power grid and the household electricity storage equipment through the transformer; the pile-jointed platform selects a first reverse output end and a second reverse output end through the control module.

4. The ac charging post V2G system according to claim 1, wherein a detection unit is provided in the ac charging post for monitoring the amount of electricity received in the reverse direction of the ac charging post and the reverse voltage and current; the alternating current charging pile is also internally provided with an emergency stop device for remotely terminating the reverse charging of the new energy automobile; the detection unit is in communication connection with the pile connection platform; and the pile-connected platform remotely controls the emergency stop device.

5. The ac charging post V2G system according to claim 1, wherein the household electrical storage device is a UPS battery or an energy storage battery cabinet.

6. The AC charging post V2G system according to claim 4, wherein the AC charging post is provided with an emergency stop button for stopping the reverse charging of the new energy vehicle.

7. The method of the AC charging post V2G, based on the AC charging post V2G system of any one of claims 1 to 6, comprising the following steps:

s2, selecting a corresponding reverse charging mode on the vehicle-mounted platform by a user;

s3, when the user selects a power grid return mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module, and the alternating current charging pile returns the electricity to the power grid;

s4 when the user selects the home power storage mode; the new energy automobile passes through two-way OBC module backward discharge gives alternating-current charging stake, alternating-current charging stake is with electric storage to domestic accumulate equipment.

8. The method of claim 7, further comprising prior to S2:

s1, the vehicle-mounted battery management system detects the state parameters of the battery of the new energy automobile in real time and uploads the state parameters to the vehicle-mounted platform, and when the new energy automobile is in a reverse charging state, the vehicle-mounted platform initiates a reverse charging prompt to a user.

9. The method for AC charging post V2G of claim 7,

the step S2 specifically includes: a user selects a reverse charging mode through the vehicle-connected platform, and the vehicle-connected platform feeds back the selection of the user to the pile-connected platform;

the step S3 specifically includes: when a user selects a power grid return mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module; the pile connection platform selects the second reverse output end through the control module and transmits electricity from the alternating current charging pile back to a power grid;

the step S4 specifically includes: when a user selects a household electricity storage mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module; the pile connection platform selects the first reverse output end through the control module, and electricity is stored in the household electricity storage device from the alternating current charging pile or directly supplied to household appliances.

10. The method of claim 7, further comprising:

s5, the detection unit monitors electric quantity and reverse voltage and current data received by the alternating current charging pile in a reverse direction in real time, uploads the data to the pile connection platform, and sends out a reverse charging abnormity notification when the data is abnormal;

s6 the user selects to reverse charge through the scram device remote terminal or to terminate reverse charge through the scram button.

Technical Field

The invention relates to the technical field of new energy automobile charging, in particular to an alternating current charging pile V2G system and method.

Background

V2G is an abbreviation for Vehicle-to-grid. V2G describes the relationship of the electric vehicle to the grid. When the electric automobile is not used, the electric energy of the vehicle-mounted battery is sold to a system of a power grid. If the on-board battery needs to be charged, current flows from the grid to the vehicle.

At present, the scheme of V2G related to the field is that the electric vehicle realizes the reverse discharge through the dc charging pile. However, the direct current charging pile is high in installation and operation and maintenance cost, large in battery loss and not suitable for the requirement of family electricity storage, and particularly suitable for areas with dispersed regions such as rural areas, towns and the like and high difficulty in operation and maintenance of power grid stability.

In addition, the future charging pile may not only be a power grid, but also be directly from clean renewable energy sources such as photovoltaic wind energy, and the prospect of the V2G based on the direct-current charging pile is not optimistic enough.

Disclosure of Invention

The technical problem to be solved by the invention is to provide an alternating current charging pile V2G system and method, which can realize V2G based on the alternating current charging pile, supply power to a family, store emergency power and solve the problem of difficulty in maintaining electric power in remote areas.

In order to achieve the purpose, the invention adopts the technical scheme that:

the alternating current charging pile V2G system comprises an alternating current charging pile and a vehicle-connected platform; the alternating current charging pile is used for charging the new energy automobile, or reversely returning electricity to a power grid, or reversely supplying electricity to a family; the new energy automobile is provided with a bidirectional OBC module; the vehicle-mounted platform comprises a reverse charging mode, and the reverse charging mode comprises a power grid return mode and a household power storage mode; the power grid return mode means that the new energy automobile reversely discharges electricity to the alternating-current charging pile through the bidirectional OBC module, and the alternating-current charging pile returns the electricity to the power grid; the household electricity storage mode means that the new energy automobile reversely discharges electricity to the alternating-current charging pile through the bidirectional OBC module, and the alternating-current charging pile stores the electricity to the household electricity storage equipment or directly supplies electricity to the household appliance.

Further, the new energy automobile also comprises a vehicle-mounted battery management system; the vehicle-mounted battery management system transmits the battery real-time state parameters of the new energy automobile to the vehicle-connected platform for judging whether the new energy automobile is in a reverse chargeable state or not.

Further, the V2G system further includes a pile platform; the vehicle-connected platform is in communication connection with the pile-connected platform and is used for sending charging mode information to the pile-connected platform; the alternating-current charging pile is provided with a control module, a first reverse output end, a second reverse output end and a transformer; the first reverse output end and the second reverse output end are respectively connected with a power grid and household electricity storage equipment through a transformer; the pile connection platform selects a first reverse output end and a second reverse output end through the control module.

Furthermore, a detection unit for monitoring the electric quantity reversely received by the alternating-current charging pile and the reverse voltage and current is arranged in the alternating-current charging pile; an emergency stop device for remotely terminating the reverse charging of the new energy automobile is further arranged in the alternating-current charging pile; the detection unit is in communication connection with the pile connection platform; pile allies oneself with platform remote control scram device.

In particular, the domestic electrical storage device may be a UPS battery or an energy storage battery cabinet.

Furthermore, an emergency stop button for stopping the reverse charging of the new energy automobile is arranged on the alternating-current charging pile.

The method of the alternating current charging post V2G, based on the alternating current charging post V2G system of any one of claims 1 to 6, characterized by comprising the following steps: s2, selecting a corresponding reverse charging mode on the vehicle-connected platform by the user; s3, when the user selects the power grid return mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module, and the alternating current charging pile returns the electricity to the power grid; s4 when the user selects the home power storage mode; the new energy automobile gives alternating-current charging stake through two-way OBC module reverse discharge, and alternating-current charging stake is with electric storage to domestic accumulate equipment or direct power supply for domestic appliance.

Further, before S2, the method further includes: s1 the vehicle-mounted battery management system detects the state parameters of the battery of the new energy automobile in real time and uploads the state parameters to the vehicle-mounted platform, and when the new energy automobile is in a reverse charging state, the vehicle-mounted platform initiates a reverse charging prompt to a user.

Specifically, step S2 is: the user selects a reverse charging mode through the vehicle-connected platform, and the vehicle-connected platform feeds back the selection of the user to the pile-connected platform; step S3 is: when a user selects a power grid return mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module; the pile connection platform selects a second reverse output end through the control module and transmits electricity from the alternating current charging pile back to the power grid; step S4 is: when the user selects the household electricity storage mode, the new energy automobile reversely discharges electricity to the alternating current charging pile through the bidirectional OBC module; the pile connection platform selects the first reverse output end through the control module, and electricity is stored in the household electricity storage equipment from the alternating current charging pile.

Further, the method for charging the alternating current charging pile V2G further includes: the detection unit of S5 monitors the electric quantity and reverse voltage and current data received by the AC charging pile in real time, uploads the data to the pile connection platform, and sends out a reverse charging abnormal notification when the data are abnormal; s6 the user selects to reverse charge through the scram device remote terminal or to terminate the reverse charge through the scram button.

The technical scheme has the following advantages or beneficial effects:

(1) according to the invention, reverse electricity return of the new energy automobile to a power grid or household electricity storage is realized through the alternating current charging pile, and the alternating current charging pile has smaller power, so that the novel energy automobile power storage system is more suitable for household electricity storage in rural and township areas with dispersed regions and difficult power maintenance than the direct current charging pile-based V2G, and has wider application range.

(2) The user can select to carry out reverse charging when the new energy automobile is judged to be in a reverse charging state by the vehicle-connected platform, so that the stability of reverse charging can be improved, and the battery health of the new energy automobile is protected.

(3) When the detection unit detects the abnormity of the electric quantity reversely received by the alternating-current charging pile and the reverse voltage and current, the emergency stop device can be remotely controlled by the pile connection platform to stop reverse charging, so that the safety during reverse charging is ensured.

(4) When detecting unit detects the electric quantity that alternating-current charging stake reverse receipt and the unusual of reverse voltage electric current, if the user when alternating-current charging stake is near, can directly terminate reverse charging through the scram button on the alternating-current charging stake, convenient and fast more.

(5) When the load of the power grid is too high, the new energy automobile battery can feed power to the power grid or directly supply power to household appliances; when the load of the power grid is low, the surplus electric quantity can be stored in the household power storage equipment to be used as an emergency power supply in the future, so that reasonable electric energy dispatching is realized, the utilization rate of resources is improved, and the waste of the resources is avoided.

Drawings

The invention and its features, aspects and advantages will become more apparent from reading the following detailed description of non-limiting embodiments with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements. The drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention.

Fig. 1 is a schematic diagram of an ac charging pile V2G system according to the present invention;

fig. 2 is a schematic diagram of the method of the ac charging pile V2G provided by the present invention.

Detailed Description

The invention will be further described with reference to the following drawings and specific examples, which are not intended to limit the invention thereto.

Example 1:

in the embodiment 1 of the invention, in which the pile connection platform and the car connection platform are integrated with the mobile phone app, when the mobile phone app is actually used, referring to fig. 1 and 2, the alternating current charging pile 1 is a household intelligent alternating current charging pile, a vehicle-mounted battery management system 21 of the new energy automobile 2 detects a discharging signal of a battery of the new energy automobile 2 in real time and uploads the discharging signal to the car connection platform 3, the car connection platform 3 judges whether the new energy automobile 2 is in a state capable of being charged reversely, and if so, the car connection platform 3 initiates a prompt capable of being charged reversely to a user. After receiving the prompt, the user can select whether to carry out reverse charging or select reverse power return to the power grid or reverse power storage to the household or directly supply power to the household appliance according to the actual situation. Specifically, when the power utilization peak period is over high and the load of the power grid is high, a user is advocated to feed power to the power grid; when the load of the power grid is low, the surplus power can be stored in the household power storage equipment to be used as an emergency power supply at a later date.

When a user selects a power grid return mode, the new energy automobile 2 reversely discharges through the bidirectional OBC module 22 and charges the alternating-current charging pile 1 through conversion of the transformer 11, and the pile connection platform 4 selects the second reverse output end 13 through the control module 12 and returns electricity from the alternating-current charging pile 1 to a power grid. When the user selects domestic electric storage mode, new energy automobile 2 through two-way OBC module 22 reverse discharge and give alternating-current charging stake 1 via transformer 11's conversion, stake antithetical couplet platform 4 selects first reverse output 14 through control module 12, with electric from alternating-current charging stake 1 storage to domestic electric storage equipment or direct power supply give domestic appliance, when direct power supply gives domestic appliance, can also install ammeter measurement charge additional.

In the reverse charging process, the detection unit 15 monitors the electric quantity and the reverse voltage and current data which are reversely received by the alternating-current charging pile 1 in real time, uploads the data to the pile connection platform 4, sends out a reverse charging abnormal notice when the data are abnormal, and after a user receives the notice, if the user is near the alternating-current charging pile 1, the user can select to stop reverse charging through the emergency stop button 16 nearby, if the user is far away from the alternating-current charging pile 1, the user cannot reach the alternating-current charging pile 1, and the emergency stop device 17 can be controlled by the pile connection platform 4 to reversely charge the remote terminal.

The above description is of the preferred embodiment of the invention; it is to be understood that the invention is not limited to the particular embodiments described above, in that devices and structures not described in detail are understood to be implemented in a manner common in the art; any person skilled in the art can make many possible variations and modifications, or modify equivalent embodiments, without departing from the technical solution of the invention, without affecting the essence of the invention; therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention are still within the scope of the protection of the technical solution of the present invention, unless the contents of the technical solution of the present invention are departed.