Energy storage system output power supply safety protection device

Abstract

An energy storage system output power supply safety protection device disclosed by the present invention comprises a high-voltage box and an external device, the high-voltage box outputs current through an internal power supply, the energy storage system output power supply safety protection device comprises a fire extinguishing system, and the fire extinguishing system comprises a power supply module, a communication module, a main control module, an acquisition module and a power supply protection module; the power supply module is used for supplying current output by the high-voltage box to the communication module, the main control module, the acquisition module and the power supply protection module; the main control module is used for collecting the temperature of the power supply module and the high-voltage box, the main control module is in communication connection with the communication module, and the communication module is used for providing information interaction between the fire extinguishing system and the high-voltage box; the acquisition module is used for acquiring power supply voltage of external equipment and temperature points in the high-voltage box; according to the scheme, the safety protection of the output power supply is mainly realized, the output power supplies of the high-voltage box are respectively isolated, the safety of other equipment and circuits in the high-voltage box can be protected when external equipment breaks down, and certain economic and safety benefits are achieved.

Description

Technical Field

[0001] The present invention belongs to the technical field of energy storage batteries, and in particular relates to a safety protection device for output power of an energy storage system. Background Art

[0002] The power safety protection device of the high-voltage box is a comprehensive system, including many different types of protection devices and monitoring equipment. The coordinated work of these devices and equipment can ensure the safe and stable operation of the high-voltage power supply system and minimize the risk of accidents. At the same time, the maintenance and maintenance of the high-voltage box is also very important. Regular inspection and maintenance can ensure the normal function of these protection devices and equipment; in the energy storage system, the output end of the high-voltage box often needs to interact with external equipment such as PCS, EMS, etc. In order to be systematic and integrated, high voltage is used to power external equipment, and each channel needs to be safely protected to ensure the complementary influence of the output power supply between each other, and at the same time, it is also necessary to protect the power supply and normal operation inside the high-voltage box. In most energy storage systems on the market, the protection of the output power supply of the high-voltage box is neglected, and there are control unit programs between each other within the system.

[0003] Chinese invention patent CN114498570B discloses a storage battery protection device and protection method based on an energy storage system, the device includes: a first module and a second module; the first module is used to monitor the operation data of the first preset connection end, and when the operation data is abnormal, the connection between the first preset connection end and the first preset switch is cut off, the first read-write area corresponding to the first module in the information interaction area sets a data transmission request flag, and writes the first data to be transmitted in the first read-write area; the second module is used to monitor the first read-write area corresponding to the first module, when the data transmission request flag is detected in the first read-write area, the first data to be transmitted is read from the first read-write area, and the connection between the second preset switch and the second preset connection end is cut off according to the first data to be transmitted, so as to protect the energy storage battery in the energy storage system. This solution integrates the control cores of the first module and the second module into the same multi-core chip to avoid communication interference of traditional cables, but this solution does not consider the solution measures when the current, voltage or temperature in the power supply is abnormal, resulting in safety hazards.

[0004] Therefore, the present invention provides an energy storage system output power safety protection device to solve the problems existing in the above-mentioned background technology. Summary of the invention

[0005] In view of the problems raised by the above background technology, the purpose of the present invention is to provide a safety protection device for output power of an energy storage system, which mainly integrates the collection of information on the output power and the current limiting protection, and the voltage source output by the high-voltage box provides working voltage for different system devices respectively, and monitors the voltage value in real time, and separates multiple outputs from each other without affecting each other.

[0006] In order to achieve the above technical objectives, the technical solution adopted by the present invention is as follows:

[0007] An energy storage system output power safety protection device includes a high-voltage box and an external device, wherein the high-voltage box outputs current through an internally arranged power supply, and includes a fire protection system, wherein the fire protection system includes a power module, a communication module, a main control module, a collection module, and a power protection module;

[0008] The power supply module is used to supply power to the communication module, the main control module, the acquisition module and the power protection module with the current output by the high-voltage box;

[0009] The main control module is used to collect the temperature of the power module and the high-voltage box, the main control module is in communication connection with the communication module, and the main control module is used to control the collection module;

[0010] The communication module is used to provide information interaction between the fire protection system and the high-voltage box;

[0011] The acquisition module is used to acquire the power supply voltage of the external device and the internal temperature point of the high-voltage box, and the acquisition module returns the acquired data to the main control module;

[0012] The power protection module is used to output a stable voltage, monitor the current, and protect the high-voltage box.

[0013] It is further defined that a plurality of sampling points are provided inside the high-voltage box of the power module box, the sampling points inside the high-voltage box are copper plates, and the main control module is used to collect the temperature of the sampling points.

[0014] It is further defined that a BCU control unit is provided in the high voltage box, and the BCU control unit exchanges information with a main control module.

[0015] It is further defined that it also includes multiple output lines, and the power protection module is used to output the output voltage of the high-voltage box to each external device through the output line, and each output line includes a current limiter, and the current limiter is used to prevent the output lines from affecting each other. The current limiter is also used to control the current of the external device.

[0016] It is further defined that there are four output lines, and a control switch is arranged inside the current limiter. When the current of one of the output lines is abnormal, the external device is short-circuited: the current limiter triggers the control switch, and the control switch is used to disconnect the voltage of one of the output lines, while the other three output lines can output normally, so that the power supply inside the high-voltage box can work normally, and the external device can also work normally.

[0017] It is further defined that the acquisition module includes multiple multiplexers, the main control module is connected to the multiplexers, the main control module switches the channel for collecting data through the multiplexers, the multiplexers are used to detect whether the information of the sampling points is normal and feed back to the main control module in real time, and the sampling point information includes voltage and temperature.

[0018] It is further defined that an independent main control unit is provided inside the high-voltage box, and a plurality of sampling points are provided on the safety protection device, through which the temperature is collected, and the collected information is AD converted through the main control module, and then the data is uploaded to the main control unit inside the high-voltage box.

[0019] It is further defined that the acquisition module includes two multiplexers, multiple temperature sensors, a sampling circuit and an external circuit, the multiplexer is used for switching the acquisition points, and the main control module can control the multiplexer to select different sampling points for acquisition through the I / O interface.

[0020] It is further defined that the power supply voltage of each of the output lines is 24V, and the current limiter is used to include the output of the output line, limit the output current within a normal range, and can control the on and off of the output line through the current limiter.

[0021] Beneficial effects of the present invention:

[0022] The present invention provides a power supply safety protection device for an energy storage system, which is provided with a power module, a communication module, a main control module, a collection module and a power protection module; the power module is used to supply power to the communication module, the main control module, the collection module and the power protection module with the current output by the high-voltage box; the main control module is used to collect the temperature of the power module and the high-voltage box, and the main control module is used to control the collection module; the communication module is used to provide information interaction between the fire protection system and the high-voltage box; the collection module is used to collect the power supply voltage of the external device and the internal temperature point of the high-voltage box, and the collection module returns the collected data to the main control module; the power protection module is used to output a stable voltage, monitor the current, and protect the high-voltage box. The protection device mainly integrates the collection of information on the output power supply and the current limiting protection, and the voltage source output by the high-voltage box provides the working voltage for different system devices respectively, and monitors the voltage value in real time, and separates the multi-channel outputs from each other without affecting each other, which can not only protect the circuit inside the high-voltage box, but also can not affect the operation of other normally operating equipment when a single channel fails, so as to avoid reducing the working efficiency of the system.

[0023] To sum up, this solution mainly realizes the safety protection of the output power supply, isolates the output power supply of the high-voltage box separately, can work at the same time, and can also protect the safety of other equipment and the internal circuit of the high-voltage box when an external device fails, which has certain economic and safety benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present invention can be further illustrated by the non-limiting examples given in the accompanying drawings;

[0025] Figure 1 A system module block diagram of an embodiment of an energy storage system output power safety protection device of the present invention;

[0026] Figure 2 A system module connection diagram of an embodiment of an energy storage system output power safety protection device of the present invention;

[0027] Figure 3 The system schematic diagram of an embodiment of an energy storage system output power safety protection device of the present invention. DETAILED DESCRIPTION

[0028] In order to enable those skilled in the art to better understand the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings 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 the field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0030] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in the field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0031] Example: Figure 1-Figure 3 As shown, a power supply safety protection device for an energy storage system of the present invention includes a high-voltage box and an external device, wherein the high-voltage box outputs current through an internally arranged power supply, and includes a fire protection system, wherein the fire protection system includes a power supply module, a communication module, a main control module, a collection module, and a power supply protection module;

[0032] The power supply module is used to supply power to the communication module, the main control module, the acquisition module and the power protection module with the current output by the high-voltage box;

[0033] The main control module is used to collect the temperature of the power module and the high-voltage box, the main control module is in communication connection with the communication module, and the main control module is used to control the collection module;

[0034] Specifically, the model of the main control module is STM32F103CB;

[0035] The communication module is used to provide information interaction between the fire protection system and the high-voltage box;

[0036] The acquisition module is used to acquire the power supply voltage of the external device and the internal temperature point of the high-voltage box, and the acquisition module returns the acquired data to the main control module;

[0037] The power protection module is used to output a stable voltage, monitor the current, and protect the high-voltage box.

[0038] Preferably, a plurality of sampling points are provided inside the power module and the high-voltage box, the sampling points inside the high-voltage box are copper plates, and the main control module is used to collect the temperature of the sampling points.

[0039] Specifically, the power module is mainly used to convert the external input voltage into the power supply voltage required by each module of the safety protection device of this solution and external equipment, and mainly includes a voltage-stabilizing power supply chip and an external filtering circuit.

[0040] Preferably, a BCU control unit is provided in the high-voltage box, and the BCU control unit exchanges information with the main control module.

[0041] Specifically, the communication module of this solution is mainly used for information interaction between the main control module of the safety protection device and the BCU control unit of the high-voltage box. The information interaction method in this solution mainly uses a CAN transceiver for communication;

[0042] like Figure 3 As shown, this solution also has three LDOs (low dropout linear regulators), namely 6.8VLDO, 5VLDO and 3VLDO. One ends of 6.8VLDO, 5VLDO and 3VLDO are connected in series, and the other ends are grounded, wherein 5VLDO is connected to the CAN transceiver.

[0043] Preferably, it also includes multiple output lines, and the power protection module is used to output the output voltage of the high-voltage box to each external device through the output line, and each output line includes a current limiter, and the current limiter is used to prevent the output lines from affecting each other. The current limiter is also used to control the current of the external device.

[0044] Preferably, there are four output lines, and a control switch is arranged inside the current limiter. When the current of one of the output lines is abnormal, the external device is short-circuited: the current limiter triggers the control switch, and the control switch is used to disconnect the voltage of one of the output lines, while the other three output lines can output normally, so that the power supply inside the high-voltage box can work normally, and the external device can also work normally.

[0045] Specifically, in this solution, the output voltage of the high-voltage box is output as four 24V power supply voltages. On each output line, there is a current limiter of model LM5069 for protecting the output of that line. The LM5069 current limiter limits the output current within a normal range and can control its internal structure through the current limiter, thereby realizing the on-off control of the output line.

[0046] Preferably, the acquisition module includes a plurality of multiplexers, the main control module is connected to the multiplexers, the main control module switches the channel for collecting data through the multiplexers, the multiplexers are used to detect whether the information of the sampling points is normal and feed back to the main control module in real time, and the sampling point information includes voltage and temperature.

[0047] Specifically, this solution mainly uses a multiplexer for the main control module to switch the acquisition channel, which can be completed within the sampling period. The model of the multiplexer is SN74HC4851QPWRG4Q1. The main control module completes the acquisition of all voltage and temperature analog signals through the ADC peripheral, and obtains the required data through AD conversion and data processing, and uploads the data to the BCU control unit inside the high-voltage box. When the voltage or temperature is abnormal, the main control module alarms and uploads the alarm signal to the BCU control unit of the high-voltage box through the communication module.

[0048] Preferably, an independent main control unit is provided inside the high-voltage box, and a plurality of sampling points are provided on the safety protection device, through which the temperature is collected, and the collected information is AD converted by the main control module, and then the data is uploaded to the main control unit inside the high-voltage box.

[0049] Preferably, the acquisition module includes two multiplexers, multiple temperature sensors, a sampling circuit and an external circuit. The multiplexer is used for switching the acquisition points. The main control module can control the multiplexer to select different sampling points for acquisition through the I / O interface.

[0050] Preferably, the power supply voltage of each of the output lines is 24V, and the current limiter is used to include the output of the output line, limit the output current within a normal range, and can control the on and off of the output line through the current limiter.

[0051] The working principle of this scheme is:

[0052] By setting up a power module, a communication module, a main control module (STM32F103CB), an acquisition module and a power protection module; the power module is used to supply power to the communication module, the main control module, the acquisition module and the power protection module with the current output by the high-voltage box; the main control module is used to acquire the temperature of the power module and the high-voltage box, and the main control module is used to control the acquisition module; the communication module is used to provide information interaction between the fire protection system and the high-voltage box; the acquisition module is used to acquire the power supply voltage of the external device and the internal temperature point of the high-voltage box, and the acquisition module returns the acquired data to the main control module, and the acquisition module includes two multiplexers (SN74HC4851QPWRG4Q1); the power protection module is used to output a stable voltage, monitor the current, and protect the high-voltage box. In this scheme, the output voltage of the high-voltage box is output as four 24V power supply voltages respectively, and each output line has a current limiter of model LM5069 to protect the output of the line. The protection device mainly integrates the collection of output power information and current limiting protection. The voltage source output by the high-voltage box provides working voltage for different system equipment respectively, monitors the voltage value in real time, and separates multiple outputs from each other without affecting each other. It can not only protect the circuit inside the high-voltage box, but also, when a single circuit fails, it will not affect the operation of other normally operating equipment, thereby avoiding reducing the working efficiency of the system.

[0053] To sum up, this solution mainly realizes the safety protection of the output power supply, isolates the output power supply of the high-voltage box separately, can work at the same time, and can also protect the safety of other equipment and the internal circuit of the high-voltage box when an external device fails, which has certain economic and safety benefits.

[0054] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A power supply safety protection device for an energy storage system, comprising a high-voltage box and an external device, wherein the high-voltage box outputs current through an internally arranged power supply, and is characterized in that: It includes a fire protection system, which includes a power supply module, a communication module, a main control module, a collection module and a power protection module; The power supply module is used to supply power to the communication module, the main control module, the acquisition module and the power protection module with the current output by the high-voltage box; The main control module is used to collect the temperature of the power module and the high-voltage box, the main control module is in communication connection with the communication module, and the main control module is used to control the collection module; The communication module is used to provide information interaction between the fire protection system and the high-voltage box; The acquisition module is used to acquire the power supply voltage of the external device and the internal temperature point of the high-voltage box, and the acquisition module returns the acquired data to the main control module; The power protection module is used to output a stable voltage, monitor the current, and protect the high-voltage box.

2. The energy storage system output power safety protection device according to claim 1, characterized in that: The power module and the high-voltage box are provided with a plurality of sampling points. The sampling points inside the high-voltage box are copper plates. The main control module is used to collect the temperature of the sampling points.

3. The energy storage system output power safety protection device according to claim 1, characterized in that: A BCU control unit is provided in the high voltage box, and the BCU control unit exchanges information with the main control module.

4. The energy storage system output power safety protection device according to claim 1, characterized in that: It also includes multiple output lines. The power protection module is used to output the output voltage of the high-voltage box to each external device through the output line, and each output line includes a current limiter. The current limiter is used to prevent the output lines from affecting each other. The current limiter is also used to control the current of the external device.

5. The energy storage system output power safety protection device according to claim 4, characterized in that: There are four output lines, and a control switch is arranged inside the current limiter. When the current of one of the output lines is abnormal, the external device is short-circuited: the current limiter triggers the control switch, and the control switch is used to disconnect the voltage of one of the output lines, while the other three output lines can output normally, so that the power supply inside the high-voltage box can work normally, and the external device can also work normally.

6. The energy storage system output power safety protection device according to claim 1, characterized in that: The acquisition module includes a plurality of multiplexers, the main control module is connected to the multiplexers, the main control module switches the channel for collecting data through the multiplexers, the multiplexers are used to detect whether the information of the sampling points is normal and feed back to the main control module in real time, and the sampling point information includes voltage and temperature.

7. The energy storage system output power safety protection device according to claim 1, characterized in that: An independent main control unit is arranged inside the high-voltage box, and a plurality of sampling points are arranged on the safety protection device. The temperature is collected through the sampling points, and the collected information is AD converted through the main control module, and then the data is uploaded to the main control unit inside the high-voltage box.

8. The energy storage system output power safety protection device according to claim 6, characterized in that: The acquisition module includes two multiplexers, multiple temperature sensors, a sampling circuit and an external circuit. The multiplexer is used to switch the acquisition points. The main control module can control the multiplexer to select different sampling points for acquisition through the I / O interface.

9. The energy storage system output power safety protection device according to claim 5, characterized in that: The power supply voltage of each output line is 24V. The current limiter is used to include the output of the output line, limit the output current within a normal range, and can control the on and off of the output line through the current limiter.

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