Charging pile and control system thereof

Abstract

The invention provides a charging pile and a control system thereof. The control system comprises a first relay KA1; a second relay relay KA2; a first power distribution relay KM1; a second power distribution relay KM2; the main contact of the third power distribution relay KM3 is arranged between the main contact of the first power distribution relay and the main contact of the second power distribution relay; a first switch K1; a second switch K2; a third switch K3; and the controller is used for controlling the states of the first switch, the second switch and the third switch, so that the third power distribution relay is immediately disconnected when the first charging loop and the second charging loop work. According to the invention, under the conditions of multi-gun charging and possible power distribution among the guns, the related relays are controlled to be disconnected, so that a loop can be effectively prevented from being formed between the two guns, the risk of vehicle burning possibly caused by abnormal loops is avoided, and the safety of the charging process is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of charging piles, and in particular to a control system of a charging pile and a charging pile. Background Art

[0002] As the number of new energy vehicles gradually increases and the range of pure electric vehicles gradually increases, the demand for charging of electric vehicles is increasing. In order to increase the charging speed and the efficiency of charging piles, the use of power distribution technology is also increasing.

[0003] When distributing power, if the distribution is wrong and a loop is formed between the two charging guns, it may cause damage to the vehicle battery or even the risk of the vehicle burning, seriously affecting the safety of charging. Summary of the invention

[0004] The present invention aims to solve the technical problem that when distributing power, a loop is formed between two charging guns, which may damage the vehicle battery or burn the vehicle. The first purpose of the present invention is to provide a control system for a charging pile.

[0005] The second objective of the present invention is to provide a charging pile.

[0006] The technical solution adopted by the present invention is as follows: An embodiment of the first aspect of the present invention proposes a control system for a charging pile, including: a first relay relay, wherein one end of a main contact of the first relay relay is connected to a pull-up power supply; a second relay relay, wherein a main contact of the second relay relay is connected in parallel with a main contact of the first relay relay; a first power distribution relay, wherein one end of a main contact of the first power distribution relay is connected to a charging gun of a first charging circuit, and the other end of a main contact of the first power distribution relay is connected to a first power pool; a second power distribution relay, wherein one end of the second power distribution relay is connected to a charging gun of a second charging circuit, and the other end of a main contact of the second power distribution relay is connected to a second power pool; a third power distribution relay, wherein the main contact of the third power distribution relay is arranged between the main contact of the first power distribution relay and the main contact of the second power distribution relay. a first switch, one end of which is connected to the other end of the main contact of the first relay relay, the other end of which is connected to one end of the coil of the third power distribution relay, and the other end of the coil of the third power distribution relay is grounded; a second switch, the second switch is connected to the first preset power supply through the coil of the first relay relay and the coil of the first power distribution relay; a third switch, the third switch is connected to the second preset power supply through the coil of the second relay relay and the coil of the second power distribution relay; a controller, the controller is used to control the states of the first switch, the second switch and the third switch, so that when the first charging circuit and the second charging circuit are both working, the third power distribution relay is immediately disconnected, so that the first charging circuit and the second charging circuit do not constitute a circuit.

[0007] The control system of the charging pile proposed in the present invention may also have the following additional technical features: According to an embodiment of the present invention, the first relay relay and the second relay relay are normally closed relays.

[0008] According to one embodiment of the present invention, the controller is specifically used for: when the charging pile is in an initial state, the controller controls the first switch, the second switch and the third switch to be disconnected, and the first power distribution relay, the second power distribution relay and the third power distribution relay to be disconnected.

[0009] According to one embodiment of the present invention, the controller is specifically used for: When the charging gun of the first charging circuit is charging and the charging gun of the second charging circuit is not charging, the second switch is controlled to be closed and the third switch is kept open, the first relay relay is switched open from the normally closed state, and the first charging circuit is turned on. If the power of the second power pool is called, the first switch is controlled to be closed, the third power distribution relay is powered on and closed, and the first charging circuit calls the power of the second power pool through the third power distribution relay. At this time, if the charging gun of the second charging circuit comes to charge a vehicle, the third switch is controlled to be closed, the coils of the second power distribution relay and the second relay relay are energized, the second relay relay is immediately disconnected, and the third power distribution relay is disconnected, so that the first charging circuit and the second charging circuit do not form a loop.

[0010] According to one embodiment of the present invention, the controller is further configured to: When the charging gun of the second charging circuit is charging and the charging gun of the first charging circuit is not charging, the third switch is controlled to be closed and the second switch is kept open, the second relay relay is switched open from the normally closed state, and the second charging circuit is turned on. If the power of the first power pool is called, the first switch is controlled to be closed, the third power distribution relay is powered on and closed, and the second charging circuit calls the power of the first power pool through the third power distribution relay. At this time, if the charging gun of the first charging circuit comes to charge a vehicle, the second switch is controlled to be closed, the coils of the first power distribution relay and the first relay relay are energized, the first relay relay is immediately disconnected, and the third power distribution relay is disconnected, so that the first charging circuit and the second charging circuit do not form a loop.

[0011] According to an embodiment of the present invention, the pull-up power supply, the first preset power supply and the second preset power supply are 12V direct current.

[0012] An embodiment of the second aspect of the present invention provides a charging pile, including the control system of the charging pile described in the embodiment of the first aspect of the present invention.

[0013] Beneficial effects of the present invention: When multiple guns are charged and power distribution is possible between the guns, the present invention can effectively prevent the formation of a loop between two guns by controlling the disconnection of related relays, avoiding the risk of vehicle burning due to loop abnormality and ensuring the safety of the charging process. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 Schematic diagram of circuit topology of a control system of a charging pile according to an embodiment of the present invention. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0016] Figure 1 This is a circuit topology diagram of a control system of a charging pile according to an embodiment of the present invention. As shown in the figure, the control system of the charging pile includes: a first relay relay KA1, a second relay relay KA2, a first power distribution relay KM1, a second power distribution relay KM2, a third power distribution relay KM3, a first switch K1, a second switch K2, a third switch K3 and a controller (not specifically shown in the figure).

[0017] Among them, one end of the main contact of the first relay relay KA1 is connected to the pull-up power supply VCC1; the main contact of the second relay relay KA2 is connected in parallel with the main contact of the first relay relay KA1; one end of the main contact of the first power distribution relay KM1 is connected to the charging gun Plug1 of the first charging circuit, and the other end of the main contact of the first power distribution relay KM1 is connected to the first power pool; one end of the main contact of the second power distribution relay KM2 is connected to the charging gun Plug2 of the second charging circuit, and the other end of the main contact of the second power distribution relay KM2 is connected to the second power pool; the main contact of the third power distribution relay KM3 is arranged between the main contact of the first power distribution relay KM1 and the main contact of the second power distribution relay KM2; one end of the first switch K1 is connected to the first The other end of the main contact of the relay relay KA1 is connected, the other end of the first switch K1 is connected to one end of the coil of the third power distribution relay KM3, and the other end of the coil of the third power distribution relay KM3 is grounded; the second switch K2 is connected to the first preset power supply VCC2 through the coil of the first relay relay KA1 and the coil of the first power distribution relay KM1; the third switch K3 is connected to the second preset power supply VCC3 through the coil of the second relay relay KA2 and the coil of the second power distribution relay KM2; the controller is used to control the states of the first switch K1, the second switch K2 and the third switch K3, so that when the first charging circuit and the second charging circuit are both working, the third power distribution relay KM3 is immediately disconnected, so that the first charging circuit and the second charging circuit do not constitute a circuit.

[0018] Specifically, Figure 1COM represents the ground terminal, the first power pool and the second power pool are used to provide charging power to the corresponding charging guns, and the controller can be connected to the control terminals of the first switch K1, the second switch K2 and the third switch K3 to control the first switch K1, the second switch K2 and the third switch K3. The first relay relay KA1 and the second relay relay KA2 are set, and the controller controls the states of the first switch K1, the second switch K2 and the third switch K3, so that the pull-up power supply of the third power distribution relay KM3 fails when the charging gun Plug1 and the charging gun Plug2 work at the same time, and the third power distribution relay KM3 is immediately disconnected and remains disconnected. Therefore, when multiple guns are charged and power distribution is possible between the guns, by controlling the disconnection of the relevant relays, a loop can be effectively prevented between the two guns, avoiding the risk of burning the car due to loop abnormalities, and ensuring the safety of the charging process.

[0019] In one embodiment of the present invention, Figure 1 As shown, the first relay relay KA1 and the second relay relay KA2 are normally closed relays.

[0020] In one embodiment of the present invention, the controller is specifically used for: when the charging pile is in the initial state, the controller controls the first switch K1, the second switch K2 and the third switch K3 to be disconnected, and the first power distribution relay KM1, the second power distribution relay KM2 and the third power distribution relay KM3 to be disconnected.

[0021] Specifically, if there is no vehicle charging in all charging circuits and the charging pile is in the initial state, the controller controls the first switch K1, the second switch K2 and the third switch K3 to be disconnected, and the coils of the first power distribution relay KM1, the second power distribution relay KM2 and the third power distribution relay KM3 shall not be electrically disconnected.

[0022] In one embodiment of the present invention, the controller is specifically used for: when the charging gun Plug1 of the first charging circuit is charging and the charging gun Plug2 of the second charging circuit is not charging, the second switch K2 is controlled to be closed, and the third switch K3 is kept disconnected, the first relay relay KA1 is switched off from the normally closed state, and the first charging circuit is turned on. If the power of the second power pool is called, the first switch K1 is controlled to be closed, and the third power distribution relay KM3 is powered on and closed. The first charging circuit calls the power of the second power pool through the third power distribution relay KM3. At this time, if the charging gun Plug2 of the second charging circuit comes to charge the vehicle, the third switch K3 is controlled to be closed, the coils of the second power distribution relay KM2 and the second relay relay KA2 are energized, the second relay relay KA2 is immediately disconnected, and the third power distribution relay KM3 is disconnected, so that the first charging circuit and the second charging circuit do not constitute a circuit, Plug2 can be charged normally, and the risk of burning the vehicle is avoided.

[0023] In one embodiment of the present invention, the controller may also be used to: When the charging gun Plug2 of the second charging circuit is charging and the charging gun Plug1 of the first charging circuit is not charging, the third switch K3 is controlled to be closed, and the second switch K2 is kept disconnected, the second relay relay KA2 is switched off from the normally closed state, and the second charging circuit is turned on. If the power of the first power pool is called, the first switch K1 is controlled to be closed, and the third power distribution relay KM3 is powered on and closed. The second charging circuit calls the power of the first power pool through the third power distribution relay KM3. At this time, if the charging gun Plug1 of the first charging circuit comes to charge the vehicle, the second switch K2 is controlled to be closed, the coils of the first power distribution relay KM1 and the first relay relay KA1 are energized, the first relay relay KA1 is immediately disconnected, and the third power distribution relay KM3 is disconnected, so that the first charging circuit and the second charging circuit do not constitute a loop, Plug1 can be charged normally, and the risk of burning the vehicle is avoided.

[0024] In one embodiment of the present invention, the pull-up power source VCC1, the first preset power source VCC2 and the second preset power source VCC3 may be 12 V DC. The specific voltage level depends on the rated voltage of the device and the output voltage of the mainboard.

[0025] Figure 1 The figure shows a scenario of one group of charging guns, namely, charging gun Plug1 and charging gun Plug2. If there are multiple groups of guns, you only need to add relay relays (KA1 and KA2) and switches (K1, K2 and K3) accordingly to realize this function in the multi-gun system. In theory, there is no limit to the number of charging guns.

[0026] To sum up, according to the control system of the charging pile embodiment of the present invention, when multiple guns are charged and power distribution is possible between the guns, by controlling the disconnection of related relays, it can effectively prevent the formation of a loop between the two guns, avoid the risk of burning the car due to circuit abnormality, and ensure the safety of the charging process.

[0027] In addition, the present invention also provides a charging pile, including the control system of the above-mentioned charging pile.

[0028] According to the charging pile of the embodiment of the present invention, through the control system of the above-mentioned charging pile, when multiple guns are charged and power distribution is possible between the guns, by controlling the disconnection of related relays, a loop can be effectively prevented from being formed between the two guns, thereby avoiding the risk of burning the vehicle due to circuit abnormality and ensuring the safety of the charging process.

[0029] In the description of the present invention, the description with reference to the terms "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms are not necessarily for the same embodiment or example. Any process or method description in a flow chart or otherwise described herein may be understood to represent a module, fragment or portion of a code including one or more executable instructions for implementing the steps of a custom logical function or process, and the scope of the preferred embodiments of the present invention includes additional implementations, in which functions may be performed in a non-sequential order as shown or discussed, including in a substantially simultaneous manner or in reverse order according to the functions involved, which should be understood by a technician in the technical field to which the embodiments of the present invention belong.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] A person skilled in the art may understand that all or part of the steps in the method for implementing the above-mentioned embodiment may be completed by instructing related hardware through a program, and the program may be stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiment.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A control system for a charging pile, characterized in that: include: A first relay relay, wherein one end of a main contact of the first relay relay is connected to a pull-up power supply; a second relay relay, wherein a main contact of the second relay relay is connected in parallel with a main contact of the first relay relay; A first power distribution relay, wherein one end of a main contact of the first power distribution relay is connected to a charging gun of a first charging circuit, and the other end of a main contact of the first power distribution relay is connected to a first power pool; A second power distribution relay, wherein one end of a main contact of the second power distribution relay is connected to a charging gun of a second charging circuit, and the other end of a main contact of the second power distribution relay is connected to a second power pool; a third power distribution relay, wherein the main contact of the third power distribution relay is arranged between the main contact of the first power distribution relay and the main contact of the second power distribution relay; A first switch, wherein one end of the first switch is connected to the other end of the main contact of the first relay relay, the other end of the first switch is connected to one end of the coil of the third power distribution relay, and the other end of the coil of the third power distribution relay is grounded; a second switch, wherein the second switch is connected to a first preset power source through a coil of the first relay relay and a coil of a first power distribution relay; a third switch connected to a second preset power source through a coil of the second relay relay and a coil of the second power distribution relay; A controller is used to control the states of the first switch, the second switch and the third switch so that when the first charging circuit and the second charging circuit are both working, the third power distribution relay is immediately disconnected so that the first charging circuit and the second charging circuit do not form a loop.

2. The control system of the charging pile according to claim 1, characterized in that: The first relay relay and the second relay relay are normally closed relays.

3. The control system of the charging pile according to claim 2, characterized in that: The controller is specifically used for: When the charging pile is in an initial state, the controller controls the first switch, the second switch and the third switch to be disconnected, and the first power distribution relay, the second power distribution relay and the third power distribution relay to be disconnected.

4. The control system of the charging pile according to claim 3, characterized in that: The controller is specifically used for: When the charging gun of the first charging circuit is charging and the charging gun of the second charging circuit is not charging, the second switch is controlled to be closed and the third switch is kept open, the first relay relay is switched open from the normally closed state, and the first charging circuit is turned on. If the power of the second power pool is called, the first switch is controlled to be closed, the third power distribution relay is powered on and closed, and the first charging circuit calls the power of the second power pool through the third power distribution relay. At this time, if the charging gun of the second charging circuit comes to charge a vehicle, the third switch is controlled to be closed, the coils of the second power distribution relay and the second relay relay are energized, the second relay relay is immediately disconnected, and the third power distribution relay is disconnected, so that the first charging circuit and the second charging circuit do not form a loop.

5. The control system of the charging pile according to claim 4, characterized in that: The controller is also used for: When the charging gun of the second charging circuit is charging and the charging gun of the first charging circuit is not charging, the third switch is controlled to be closed and the second switch is kept open, the second relay relay is switched open from the normally closed state, and the second charging circuit is turned on. If the power of the first power pool is called, the first switch is controlled to be closed, the third power distribution relay is powered on and closed, and the second charging circuit calls the power of the first power pool through the third power distribution relay. At this time, if the charging gun of the first charging circuit comes to charge a vehicle, the second switch is controlled to be closed, the coils of the first power distribution relay and the first relay relay are energized, the first relay relay is immediately disconnected, and the third power distribution relay is disconnected, so that the first charging circuit and the second charging circuit do not form a loop.

6. The control system of the charging pile according to claim 1, characterized in that: The pull-up power supply, the first preset power supply and the second preset power supply are 12V direct current.

7. A charging pile, characterized in that: A control system comprising a charging pile according to any one of claims 1-6.

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