Novel pile fixing decoupling system

Abstract

The utility model discloses a novel pile fixing decoupling system which comprises a battery module, an AC / DC power module, a DC / DC power module, a DC charging gun and a control module, a first relay is arranged between the AC / DC power module and an external power grid, a seventh relay is arranged between the DC / DC power module and the DC charging gun, a sixth relay is arranged between the AC / DC power module and the DC / DC power module, and the control module is connected with the AC / DC power module. The AC / DC power module is electrically connected with the battery module through a second relay and a third relay, a fifth relay is arranged between the battery module and the DC / DC power module, and the DC / DC power module is electrically connected with the battery module through a second relay and a third relay. The function of interaction between the electric automobile and the power grid (V2G mode) is achieved, the functions are not affected through the high-voltage relays, and the modules can be disassembled and assembled according to actual conditions.

Description

Technical Field

[0001] The utility model relates to the technical field of energy storage charging, and in particular to a novel pile fixing decoupling system. Background Art

[0002] With the increasing popularity of new energy electric vehicles, charging piles are also widely used, but few existing charging piles meet the function of electric vehicles and power grid interaction (V2G mode). It is impossible to support energy storage and charging when the charging pile is idle, and discharge when there are electric vehicles charging. At the same time, energy storage charging piles can store electricity in energy storage batteries when the electricity price is low or the grid is idle, and release electricity when the electricity price is high or the electricity consumption peak, alleviating the power load restriction and rate difference problems on the grid side, and also meeting the current peak power consumption shortage and emergency power supply needs.

[0003] Therefore, it is imperative to design a new type of pile decoupling system. Utility Model Content

[0004] In order to overcome the above-mentioned shortcomings, the utility model provides a novel pile fixing decoupling system.

[0005] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0006] A novel pile decoupling system comprises a battery module, an AC / DC power module, a DC / DC power module, a DC charging gun and a control module, wherein a first relay is provided between the AC / DC power module and an external power grid, a seventh relay is provided between the DC / DC power module and the DC charging gun, a sixth relay is provided between the AC / DC power module and the DC / DC power module, the AC / DC power module and the battery module are electrically connected via a second relay and a third relay, a fifth relay is provided between the battery module and the DC / DC power module, and the control module is electrically connected to the coils of the first relay, the second relay, the third relay, the fourth relay, the fifth relay, the sixth relay and the seventh relay.

[0007] Preferably, the battery module is electrically connected to a DC charging socket via a fourth relay, the fourth relay circuit is closed, and other circuits are in a disconnected state, and a DC charging pile is used to recharge the battery module.

[0008] Preferably, the positive electrode of the AC / DC power module is electrically connected to the positive electrode of the battery module through the second relay, the first relay and the second relay circuit are closed, and the other circuits are in a disconnected state. The AC / DC power module is used to replenish power for the battery module, and the negative electrode of the AC / DC power module is electrically connected to the negative electrode of the battery module through the third relay, the first relay and the third relay circuit are closed, and the other circuits are in a disconnected state. The battery module discharges to the outside through the AC / DC power module, and can discharge to the power grid or operate off-grid, thereby realizing the function of industrial and commercial energy storage.

[0009] Preferably, the first relay, the second relay, the third relay, the fourth relay, the fifth relay, the sixth relay and the seventh relay are all high-voltage relays, which can improve the working stability of the relays.

[0010] Preferably, the battery module consists of multiple groups of lithium batteries.

[0011] The beneficial effects of the utility model are as follows: the fixed pile decoupling system has four modes: battery module charging mode, DC fast charging gun charging mode, PCS inverter mode and traditional DC charging pile mode, realizing the interaction between electric vehicles and power grid (V2G mode), and through each high-voltage relay, there is no influence between functions, and the modules can be disassembled and assembled according to actual conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The present invention will be described by way of examples with reference to the accompanying drawings, in which:

[0013] Figure 1 It is a system principle diagram of the utility model. DETAILED DESCRIPTION

[0014] Now the utility model is further described in detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, which only illustrate the basic structure of the utility model in a schematic manner, and therefore only show the components related to the utility model.

[0015] like Figure 1As shown, a novel pile decoupling system includes a battery module, an AC / DC power module, a DC / DC power module, a DC charging gun and a control module. A first relay K1 is provided between the AC / DC power module and the external power grid, a seventh relay K7 is provided between the DC / DC power module and the DC charging gun, a sixth relay K6 is provided between the AC / DC power module and the DC / DC power module, the AC / DC power module and the battery module are electrically connected through a second relay K2 and a third relay K3, a fifth relay K5 is provided between the battery module and the DC / DC power module, and the control module is electrically connected to the coils of the first relay K1, the second relay K2, the third relay K3, the fourth relay K4, the fifth relay K5, the sixth relay K6 and the seventh relay K7.

[0016] The device can work in four modes, namely, battery module charging mode, DC fast charging mode, PCS inverter mode and traditional DC charging pile mode.

[0017] The battery module recharging mode includes two situations. The first is to attract the first relay K1 and the second relay K2 circuits, and the other circuits are in the disconnected state, and the AC / DC power module is used to recharge the battery module; the second is to attract the fourth relay K4 circuit, and the other circuits are in the disconnected state, and the DC charging pile is used to recharge the battery module.

[0018] In the DC fast charging gun charging mode, the fifth relay K5 and the seventh relay K7 circuits are energized, and other circuits are in the disconnected state, so that the battery module can discharge to the external vehicle through the DC / DC and DC fast charging gun, realizing the charging pile function of the storage and charging system.

[0019] In PCS inverter mode, the first relay K1 and the third relay K3 circuits are energized, and other circuits are in the disconnected state. The battery module discharges to the outside through the AC / DC power module. It can discharge to the grid or operate off-grid, realizing the function of industrial and commercial energy storage.

[0020] In the traditional DC charging pile mode, the first relay K1, the sixth relay K6 and the seventh relay K7 circuits are energized, and other circuits are in the disconnected state. This mode can decouple the battery module and the system, bypass the battery module, and realize the traditional charging pile mode through the AC / DC power module, DC / DC power module and DC fast charging gun.

[0021] Specifically, the battery module is electrically connected to a DC charging socket via a fourth relay K4, the circuit of the fourth relay K4 is closed, and other circuits are in a disconnected state, and a DC charging pile is used to recharge the battery module.

[0022] Specifically, the positive electrode of the AC / DC power module is electrically connected to the positive electrode of the battery module through the second relay K2, and the first relay K1 and the second relay K2 circuits are closed, and other circuits are in a disconnected state. The AC / DC power module is used to replenish power for the battery module, and the negative electrode of the AC / DC power module is electrically connected to the negative electrode of the battery module through the third relay K3, and the first relay K1 and the third relay K3 circuits are closed, and other circuits are in a disconnected state. The battery module discharges to the outside through the AC / DC power module, and can discharge to the power grid or operate off-grid, thereby realizing the function of industrial and commercial energy storage.

[0023] Specifically, the first relay K1 , the second relay K2 , the third relay K3 , the fourth relay K4 , the fifth relay K5 , the sixth relay K6 and the seventh relay K7 are all high-voltage relays, which can improve the working stability of the relays.

[0024] Specifically, the battery module consists of multiple groups of lithium batteries.

[0025] The above is based on the enlightenment of this utility model. Through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of ​​this utility model. The technical scope of this utility model is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A new type of pile decoupling system, characterized by: It includes a battery module, an AC / DC power module, a DC / DC power module, a DC charging gun and a control module. A first relay is provided between the AC / DC power module and the external power grid, a seventh relay is provided between the DC / DC power module and the DC charging gun, a sixth relay is provided between the AC / DC power module and the DC / DC power module, the AC / DC power module and the battery module are electrically connected through a second relay and a third relay, a fifth relay is provided between the battery module and the DC / DC power module, and the control module is electrically connected to the coils of the first relay, the second relay, the third relay, the fourth relay, the fifth relay, the sixth relay and the seventh relay.

2. The pile fixing decoupling system according to claim 1, characterized in that: The battery module is electrically connected to a DC charging socket via a fourth relay.

3. The pile fixing decoupling system according to claim 1, characterized in that: The positive electrode of the AC / DC power module is electrically connected to the positive electrode of the battery module through the second relay, and the negative electrode of the AC / DC power module is electrically connected to the negative electrode of the battery module through the third relay.

4. The pile fixing decoupling system according to claim 2, characterized in that: The first relay, the second relay, the third relay, the fourth relay, the fifth relay, the sixth relay and the seventh relay are all high voltage relays.

5. The pile fixing decoupling system according to claim 1, characterized in that: The battery module consists of multiple groups of lithium batteries.

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