High-voltage box control method and system

Abstract

The invention provides a high-voltage box control method and system. The high-voltage box control method comprises the following steps that a power supply circuit is arranged in a high-voltage box; and the power supply circuit is controlled to be switched on and off by a relay. According to the technical scheme, the power supply circuit is arranged in the high-voltage box; a relay is used for controlling the on-off of the power supply circuit; and the power supply is integrated in the high-voltage box, so that the device has the advantages of high reliability and high integration level.

Description

Background Art

[0002] As the penetration rate of electric vehicles increases, the construction speed of charging piles is also accelerating. Traditional charging piles are divided into AC charging piles and DC charging piles. The input side of both is AC power, which is taken from the local power grid. Therefore, when the power grid loses power due to a fault, the input side of the charging pile loses power and the charging pile cannot be used.

[0003] In order to achieve the purpose of normal use of charging piles when the power grid is off, the existing technical solutions often configure battery charging devices for charging piles and install UPS to supply power when the power grid is off. This solution has the disadvantages of high cost and low equipment integration. Summary of the invention

[0004] The present application provides a high-voltage box control method and system for improving the integration of an energy storage device.

[0005] In a first aspect, a high-voltage box control method is provided, comprising the following steps:

[0006] The power supply circuit is arranged in a high voltage box;

[0007] The on and off of the power supply circuit is controlled by a relay.

[0008] In the above technical solution, the power supply circuit is arranged in the high-voltage box; the on-off of the power supply circuit is controlled by a relay; and the power supply is integrated in the high-voltage box, which has the advantages of high reliability and high integration.

[0009] In a specific implementation scheme, the power supply circuit includes a first DCDC power supply G1 and a second DCDC power supply G2, and the first DCDC power supply G1 and the second DCDC power supply G2 are arranged in parallel;

[0010] The positive electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are both electrically connected to the positive electrodes of the energy storage module and the energy storage converter;

[0011] The negative electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are electrically connected to the positive electrodes of the energy storage module and the energy storage converter through the normally closed switch of the relay.

[0012] In a specific embodiment, it also includes a first anti-reverse diode D1 and a second anti-reverse diode D2, wherein,

[0013] The first anti-reverse diode D1 is arranged at the output end of the first DCDC power supply G1, and the second anti-reverse diode D1 is arranged at the output end of the second DCDC power supply G2.

[0014] In a specific implementation scheme, a fuse FU1 is also included, wherein:

[0015] The fuse FU1 is arranged between the input end of the power supply short circuit and the positive electrode of the energy storage converter for overcurrent protection.

[0016] In a specific implementation scheme, the input voltage range of the energy storage module is 200 VDC to 1500 VDC.

[0017] In a specific embodiment, it also includes a FL splitter, wherein,

[0018] The FL shunt is arranged between the normally closed switch of the relay and the negative pole of the energy storage converter.

[0019] In a specific implementation manner, a power supply control button switch SB1 is also included.

[0020] In a specific implementation manner, the power supply voltage of the relay is 220VAC.

[0021] In a specific implementation scheme, the output voltage of the first DCDC power supply G1 is 24 VDC, and the output voltage of the second DCDC power supply G2 is 12 VDC.

[0022] In a second aspect, a high-voltage box control system is provided, comprising:

[0023] A power supply module, used to set the power supply circuit in the high-voltage box;

[0024] The control module is used to control the on and off of the power supply circuit by using a relay.

[0025] In the above technical solution, the power supply circuit is arranged in the high-voltage box; the on-off of the power supply circuit is controlled by a relay; and the power supply is integrated in the high-voltage box, which has the advantages of high reliability and high integration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flowchart of a high-voltage box control method provided in an embodiment of the present application;

[0027] Figure 2 A structural block diagram of a high-voltage box control system provided in an embodiment of the present application;

[0028] Figure 3 A circuit diagram of a high-voltage box provided in an embodiment of the present application. DETAILED DESCRIPTION

[0029] The present application is further described in detail below through the accompanying drawings and embodiments. Through these descriptions, the characteristics and advantages of the present application will become clearer and more specific.

[0030] The word "exemplary" is used exclusively herein to mean "serving as an example, embodiment, or illustration." Any embodiment described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments. Although various aspects of the embodiments are shown in the drawings, the drawings are not necessarily drawn to scale unless otherwise noted.

[0031] In addition, the technical features involved in different embodiments of the present application described below can be combined with each other as long as they do not conflict with each other.

[0032] To facilitate understanding of the high-voltage box control method and system provided in the embodiment of the present application, its application scenario is first explained. The high-voltage box control method and system provided in the embodiment of the present application are used to improve the integration of the energy storage device. With the increase in the penetration rate of electric vehicles, the construction speed of charging piles is also accelerating. Traditional charging piles are divided into AC charging piles and DC charging piles, both of which have AC input sides, which are taken from the local power grid. Therefore, when the power grid loses power due to a fault, the input side of the charging pile loses power and the charging pile cannot be used. In order to achieve the purpose of normal use of the charging pile when the power grid loses power, the existing technical solutions often configure the charging pile with a battery charging device, and install a UPS to supply power when the power grid loses power. This solution has the disadvantages of high cost and low equipment integration. For this reason, the embodiment of the present application provides a high-voltage box control method and system to improve the integration of the energy storage device. The following is a detailed description of the embodiment in conjunction with specific drawings.

[0033] refer to Figures 1 to 3 , Figure 1 A flowchart of a high-voltage box control method provided in an embodiment of the present application; Figure 2 A structural block diagram of a high-voltage box control system provided in an embodiment of the present application; Figure 3 A circuit diagram of a high-voltage box provided in an embodiment of the present application.

[0034] exist Figure 1 In the embodiment of the present application, a high-voltage box control method is provided, comprising the following steps:

[0035] The power supply circuit is arranged in a high voltage box;

[0036] The on and off of the power supply circuit is controlled by a relay.

[0037] In the above technical solution, the power supply circuit is arranged in the high-voltage box; the on-off of the power supply circuit is controlled by a relay; and the power supply is integrated in the high-voltage box, which has the advantages of high reliability and high integration.

[0038] In a specific implementation scheme, the power supply circuit includes a first DCDC power supply G1 and a second DCDC power supply G2, and the first DCDC power supply G1 and the second DCDC power supply G2 are arranged in parallel;

[0039] The positive electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are both electrically connected to the positive electrodes of the energy storage module and the energy storage converter;

[0040] The negative electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are electrically connected to the positive electrodes of the energy storage module and the energy storage converter through the normally closed switch of the relay.

[0041] In a specific embodiment, it also includes a first anti-reverse diode D1 and a second anti-reverse diode D2, wherein,

[0042] The first anti-reverse diode D1 is arranged at the output end of the first DCDC power supply G1, and the second anti-reverse diode D1 is arranged at the output end of the second DCDC power supply G2.

[0043] In a specific implementation scheme, a fuse FU1 is also included, wherein:

[0044] The fuse FU1 is arranged between the input end of the power supply short circuit and the positive electrode of the energy storage converter for overcurrent protection.

[0045] In a specific implementation scheme, the input voltage range of the energy storage module is 200 VDC to 1500 VDC.

[0046] In a specific embodiment, it also includes a FL splitter, wherein,

[0047] The FL shunt is arranged between the normally closed switch of the relay and the negative pole of the energy storage converter.

[0048] In a specific implementation manner, a power supply control button switch SB1 is also included.

[0049] In a specific implementation manner, the power supply voltage of the relay is 220VAC.

[0050] In a specific implementation scheme, the output voltage of the first DCDC power supply G1 is 24 VDC, and the output voltage of the second DCDC power supply G2 is 12 VDC.

[0051] Specifically, refer to Figure 3 The main functions of the high-voltage box include:

[0052] a) Voltage and current acquisition function: mainly includes voltage and current acquisition of battery system;

[0053] b) Disconnection function: A contactor is installed in the high-voltage box to control the connection and disconnection of the battery cluster with the external circuit, so as to facilitate maintenance and control the charging and discharging process of the battery;

[0054] c) Protection function: The high-voltage box has a variety of protection mechanisms, including over-voltage, under-voltage, over-current, short circuit, over-temperature and other protections, ensuring that the circuit can be cut off in time under abnormal circumstances to protect the battery and system safety;

[0055] d) Communication function: The high-voltage box usually has the communication function with the battery management system (BMS) and the power storage converter (PCS), supports CAN communication and RS485 communication methods, and realizes information interaction and transmission of control commands;

[0056] e) Isolation function: The high voltage box is equipped with a manual isolating switch to achieve electrical isolation of the entire system when necessary, facilitating maintenance and improving safety.

[0057] exist Figure 3 In, a) XT1 and XT2 represent panel terminals;

[0058] b) G1 represents DCDC power supply, the output voltage is 24vdc

[0059] c) G2 represents DCDC power supply, the output voltage is 12vdc

[0060] d) BAT+ represents the positive electrode of the battery, BAT- represents the negative electrode of the battery, PCS+ represents the positive electrode of the PCS, and PCS- represents the negative electrode of the PCS

[0061] e)KA1 represents relay, used for DCDC power control

[0062] f)SB1 is a push button switch

[0063] The circuit description is as follows:

[0064] a) The high voltage box integrates a DCDC power supply G1 with output voltages of 24vdc and 12vdc respectively.

[0065] G2

[0066] b) The DCDC power supply is powered by the battery terminal of the main circuit of the high-voltage box, and the input voltage range is 200VDC~1500VDC

[0067] c) A fuse is used to protect the power input side, and the normally closed contact of relay KA1 is used to control the power supply. The coil of relay KA1 supplies power to the storage and charging machine with 220VAC mains power.

[0068] d) The DCDC power supply output side is connected in parallel to the overall low-voltage control power supply system of the cabinet through the panel terminal XT1 (where the low-voltage power supply of the energy storage part is 24vdc, and the low-voltage power supply of the charging cabinet part is 12vdc). The DCDC power supply output side is equipped with an anti-reverse diode to prevent the parallel power supply from circulating.

[0069] The circuit working logic is as follows:

[0070] a) When the grid power is normal, the KA1 coil is energized and the normally closed contact is disconnected. At this time, the G1 and G2 power supplies are not put into use.

[0071] b) When the grid power fails, the KA1 coil loses power and the normally closed contact closes. At this time, the G1 and G2 power supplies are put into use. At this time, the energy storage part control system and the charging part control system can operate normally.

[0072] c) This system integrates the power supply into the high-voltage box, which has the advantages of high reliability and high integration.

[0073] In the above technical solution, power is taken from the battery side of the high-voltage box, and 24VDC and 12VDC power supplies are integrated, with high integration; power supply is automatically controlled by relays, which is simple and reliable.

[0074] exist Figure 2 In the embodiment of the present application, a high-voltage box control system is provided, including:

[0075] A power supply module, used to set the power supply circuit in the high-voltage box;

[0076] The control module is used to control the on and off of the power supply circuit by using a relay.

[0077] In the above technical solution, the power supply circuit is arranged in the high-voltage box; the on-off of the power supply circuit is controlled by a relay; and the power supply is integrated in the high-voltage box, which has the advantages of high reliability and high integration.

[0078] Those skilled in the art will appreciate that the present application may be implemented as a system, method or computer program product.

[0079] Therefore, the present disclosure may be specifically implemented in the following forms, namely: it may be completely hardware, it may be completely software (including firmware, resident software, microcode, etc.), or it may be a combination of hardware and software, generally referred to herein as a "circuit", "module" or "system". In addition, in some embodiments, the present application may also be implemented in the form of a computer program product in one or more computer-readable media, and the computer-readable medium may contain computer-readable program code.

[0080] Any combination of one or more computer-readable media can be used. Computer-readable media can be computer-readable signal media or computer-readable storage media. Computer-readable storage media can be, for example, but not limited to, electrical, magnetic, optical, electromagnetic, infrared, or semiconductor systems, devices or devices, or any combination of the above. More specific examples (non-exhaustive list) of computer-readable storage media include: electrical connections with one or more wires, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the above. In this document, computer-readable storage media can be any tangible medium containing or storing a program, which can be used by an instruction execution system, device or device or used in combination with it.

[0081] Although the embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and cannot be understood as limiting the present application. A person of ordinary skill in the art can change, modify, replace and modify the above embodiments within the scope of the present application. On this basis, a variety of replacements and improvements can be made to the present application, all of which fall within the scope of protection of the present application.

Claims

1. A high voltage box control method, characterized in that: The following steps are involved: The power supply circuit is arranged in a high voltage box; The on and off of the power supply circuit is controlled by a relay.

2. The high voltage box control method according to claim 1, characterized in that: The power supply circuit includes a first DCDC power supply G1 and a second DCDC power supply G2, wherein the first DCDC power supply G1 and the second DCDC power supply G2 are arranged in parallel; The positive electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are both electrically connected to the positive electrodes of the energy storage module and the energy storage converter; The negative electrodes of the first DCDC power supply G1 and the second DCDC power supply G2 are electrically connected to the positive electrodes of the energy storage module and the energy storage converter through the normally closed switch of the relay.

3. The high voltage box control method according to claim 2, characterized in that: It also includes a first anti-reverse diode D1 and a second anti-reverse diode D2, wherein, The first anti-reverse diode D1 is arranged at the output end of the first DCDC power supply G1, and the second anti-reverse diode D1 is arranged at the output end of the second DCDC power supply G2.

4. The high voltage box control method according to claim 3, characterized in that: Also includes a fuse FU1, wherein: The fuse FU1 is arranged between the input end of the power supply short circuit and the positive electrode of the energy storage converter for overcurrent protection.

5. The high voltage box control method according to claim 4, characterized in that: The input voltage range of the energy storage module is 200VDC to 1500VDC.

6. The high voltage box control method according to claim 5, characterized in that: Also included is a FL shunt, wherein The FL shunt is arranged between the normally closed switch of the relay and the negative pole of the energy storage converter.

7. The high voltage box control method according to claim 6, characterized in that: A power supply control push button switch SB1 is also included.

8. The high voltage box control method according to claim 7, characterized in that: The power supply voltage of the relay is 220VAC.

9. The high voltage box control method according to claim 8, characterized in that: The output voltage of the first DCDC power supply G1 is 24 VDC, and the output voltage of the second DCDC power supply G2 is 12 VDC.

10. A high-voltage box control system, characterized in that: include: A power supply module, used to set the power supply circuit in the high-voltage box; The control module is used to control the on and off of the power supply circuit by using a relay.

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