Power distribution network distributed DC power supply storage battery reliability on-line detection device

Abstract

The invention relates to a power distribution network distributed DC power supply storage battery reliability on-line detection device. The device comprises a voltage monitoring module, a temperature monitoring module, a data processing module, an external circuit breaker control module and a communication module. The voltage monitoring module is used for collecting real-time voltage data of the storage battery; the temperature monitoring module is used for collecting real-time temperature data of the storage battery; the external circuit breaker control module is used for controlling the opening and closing of an external circuit breaker of the storage battery; the communication module is used for data communication between the control device and a remote terminal; the data processing module is electrically connected with the voltage monitoring module, the temperature monitoring module, the external circuit breaker control module and the communication module, and is used for detecting the reliability of the storage battery according to the real-time voltage data and the real-time temperature data of the storage battery; the storage battery reliability detection result is transmitted to a remote terminal through the communication module, and a remote terminal command is received through the communication module.

Description

Technical Field

[0001] The invention relates to an online detection device for reliability of a distributed direct current power supply battery in a power distribution network, belonging to the technical field of power systems. Background Art

[0002] The distributed DC power supply system of the distribution network, especially the supporting battery brands, are diverse. Although different brands of batteries theoretically have a service life of 5 to 10 years, in actual use, due to multiple factors such as the quality of the battery itself, on-site environmental conditions, electrical environment, and operation and maintenance management, most batteries often cannot reach their designed life expectancy. Some batteries in poor health can only maintain normal operation for a few months. According to the maintenance specifications of batteries, the introduction of new batteries needs to go through a strict engineering acceptance process, including deep discharge detection and other links. After being put into use, it is also necessary to ensure that the battery operates in a suitable temperature environment and measure the battery terminal voltage regularly. Once it is found that there is a large voltage difference in the battery pack, it should be charged evenly in time, and the battery should be tested for capacity or deep discharge regularly to evaluate the performance of the battery pack and maintain its activity.

[0003] However, about 95% of batteries in China lack scientific and effective maintenance methods. Most maintenance personnel can only take simple methods, such as regularly shutting down the mains to discharge, to try to keep the battery active, which consumes too much manpower. Products from different battery manufacturers have significant differences in design, operation mode and battery characteristics, which further increases the difficulty of maintenance. Although some advanced backup power systems have online detection functions and can achieve remote automatic maintenance, such systems are often costly and are limited to detecting their matching batteries, and are not compatible with products of other brands. Summary of the invention

[0004] In order to solve the above problems existing in the prior art, the present invention proposes an online detection device for reliability of a distributed DC power supply battery in a distribution network.

[0005] The technical solution of the present invention is as follows:

[0006] The present invention provides an online detection device for reliability of a distributed DC power supply battery in a power distribution network, comprising a voltage monitoring module, a temperature monitoring module, a data processing module, an external circuit breaker control module and a communication module;

[0007] The voltage monitoring module is used to collect real-time voltage data of the battery;

[0008] The temperature monitoring module is used to collect real-time temperature data of the battery;

[0009] The external circuit breaker control module is used to control the opening and closing of the battery external circuit breaker;

[0010] The communication module is used to control the device to communicate data with the remote terminal;

[0011] The data processing module is electrically connected to the voltage monitoring module, the temperature monitoring module, the external circuit breaker control module and the communication module respectively. The data processing module is used to perform battery reliability detection based on the real-time voltage data and real-time temperature data of the battery, and transmit the battery reliability detection result to the remote terminal through the communication module, and receive remote terminal commands through the communication module.

[0012] As a preferred embodiment of the present invention, the voltage monitoring module is connected to the positive and negative electrodes of the battery;

[0013] The voltage monitoring module is provided with a plurality of voltage-dividing resistors to divide the battery voltage signal respectively, and an RC filter circuit is provided to filter the voltage signal after the voltage division. The filtered voltage signal is then input into the operational amplifier after overvoltage protection through the bidirectional diode. The operational amplifier amplifies the regulated voltage signal and inputs it into the data processing module.

[0014] As a preferred embodiment of the present invention, the temperature monitoring module is provided with RS485 and RS232 local communication interfaces, which are connected to a plurality of temperature sensors through the local communication interfaces. The temperature sensors are respectively arranged inside and outside the battery pack. The temperature monitoring module inputs the temperature data collected by the temperature sensors into the data processing module.

[0015] As a preferred embodiment of the present invention, the external circuit breaker control module includes a circuit breaker state detection unit and a circuit breaker opening and closing control unit;

[0016] The circuit breaker state detection unit is an independent circuit breaker detection circuit, which is electrically connected to the circuit breaker. The circuit breaker detection circuit is provided with a plurality of voltage-dividing resistors to divide the circuit breaker voltage signal and then input it into the optical coupler. The optical coupler outputs the circuit breaker state signal, thereby realizing the monitoring of the circuit breaker working state;

[0017] The circuit breaker opening and closing control unit controls the opening and closing of the circuit breaker according to the circuit breaker state signal and preset conditions.

[0018] As a preferred embodiment of the present invention, the communication module supports 4G Cat1 communication protocol and standard communication protocol, as well as encrypted transmission of data.

[0019] As a preferred embodiment of the present invention, the data processing module includes a main control MCU unit, a display unit and an alarm unit;

[0020] The main control MCU unit is used for data processing, logic control and algorithm implementation;

[0021] The display unit is used to display battery data;

[0022] The alarm unit is used to generate an audible and visual alarm when the real-time voltage data or real-time temperature data of the battery exceeds a preset threshold, and at the same time send the alarm information to a remote terminal through a communication module.

[0023] As a preferred embodiment of the present invention, the device further includes a power module.

[0024] The present invention has the following beneficial effects:

[0025] 1. The present invention uses the Internet of Things technology to transmit the battery status information to the remote monitoring center in real time to achieve remote automatic detection. Through the front-end monitoring equipment, the voltage, current, temperature and other universal and critical parameters of the battery are monitored in real time to ensure that abnormal conditions are discovered in time.

[0026] 2. The present invention can remotely perform the discharge process under actual load conditions and monitor the operating curves of key parameters such as battery voltage during the discharge process in real time, thereby accurately evaluating the performance of the battery.

[0027] 3. The present invention optimizes the detection mode, monitors the key parameters that can accurately reflect the health status of the battery according to the battery operation data, and selects an efficient and economical hardware architecture and platform to control the cost within a reasonable range.

[0028] 4. Aiming at the compatibility problem of battery detection system, the present invention conducts in-depth development and optimization from two core areas: product architecture and detection mode, extracts universal key parameters, and conducts targeted detection and analysis to achieve wide compatibility with installed batteries and any battery on the market, so as to easily cope with the diverse needs of different brands, models, series and parallel modes, and voltage levels, greatly improving the practicality of the detection system.

[0029] 5. The front-end monitoring device of the present invention adopts reasonable architecture design and control logic to ensure that the normal operation of the power supply system will not be affected by problems with the monitoring device during operation or when the device itself fails, and abnormal information can be obtained in a timely manner in the background. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the overall structure diagram of the present invention;

[0031] Figure 2 This is a circuit diagram of a voltage monitoring module according to an embodiment of the present invention;

[0032] Figure 3 This is a circuit diagram of a local communication interface according to an embodiment of the present invention;

[0033] Figure 4 This is a circuit diagram of a data processing module according to an embodiment of the present invention;

[0034] Figure 5 This is a circuit diagram of an external circuit breaker control module according to an embodiment of the present invention;

[0035] Figure 6 This is a circuit diagram of a communication module according to an embodiment of the present invention;

[0036] Figure 7 This is a circuit diagram of a power module according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] 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.

[0038] It should be understood that the step numbers used in this document are only for convenience of description and are not intended to limit the order in which the steps are executed.

[0039] It should be understood that the terms used in the present specification are only for the purpose of describing specific embodiments and are not intended to limit the present invention. As used in the present specification and the appended claims, unless the context clearly indicates otherwise, the singular forms "a", "an" and "the" are intended to include plural forms.

[0040] The terms “include” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or combinations thereof.

[0041] The term "and / or" means and includes any and all possible combinations of one or more of the associated listed items.

[0042] Embodiment 1:

[0043] See also Figure 1 , an online detection device for reliability of a distributed DC power battery in a distribution network, comprising a voltage monitoring module, a temperature monitoring module, a data processing module, an external circuit breaker control module and a communication module;

[0044] The voltage monitoring module is used to collect real-time voltage data of the battery;

[0045] The temperature monitoring module is used to collect real-time temperature data of the battery;

[0046] The external circuit breaker control module is used to control the opening and closing of the battery external circuit breaker;

[0047] The communication module is used to control the device to communicate data with the remote terminal;

[0048] The data processing module is electrically connected to the voltage monitoring module, the temperature monitoring module, the external circuit breaker control module and the communication module respectively. The data processing module is used to perform battery reliability detection based on the real-time voltage data and real-time temperature data of the battery, and transmit the battery reliability detection result to the remote terminal through the communication module, and receive remote terminal commands through the communication module.

[0049] As a preferred implementation of this embodiment, see Figure 2 , the voltage monitoring module is connected to the positive and negative electrodes of the battery;

[0050] The voltage monitoring module is provided with a number of accurately calculated high-precision, low-temperature drifting voltage-dividing resistors to divide the battery voltage signal respectively, and an RC filtering circuit is provided to filter the voltage signal after the voltage division. The filtered voltage signal is then input into the operational amplifier after overvoltage protection through a bidirectional diode (the filtering and overvoltage protection operations are used to protect the subsequent circuits). The operational amplifier amplifies the regulated voltage signal and then inputs it into the 12-bit high-precision ADC unit of the main control MCU unit of the data processing module to perform uninterrupted measurement and massive calculation of the voltage signal.

[0051] As a preferred implementation of this embodiment, see Figure 3 The temperature monitoring module is provided with RS485 and RS232 local communication interfaces, which can be used to connect external sensing devices (such as temperature sensors) or communicate with other related devices to achieve specific extended application requirements;

[0052] The RS485 local communication interface is a high-performance communication chip with ±15kV IEC61000 ESD protection and meets the RS-485 communication standard. It has a communication data rate of up to 40Mbps and a wide operating temperature range (-40℃ to +125℃); low bus current (+220μA / -150μA), strong load capacity, and long communication distance.

[0053] The RS232 local communication interface device consists of two line drivers, a two-line receiver and a dual charge pump circuit with ±15kV IEC ESD protection between pins (serial port connection pins, including GND); the device meets the requirements of TIA / EIA-232-F and provides an electrical interface between asynchronous communication controllers; the charge pump and four small external capacitors allow single 3.3V power supply, and the chip can reach a maximum data rate of 250kbit / s;

[0054] The temperature monitoring module is connected to a plurality of temperature sensors through a local communication interface. The temperature sensors are respectively arranged inside and outside the battery pack. The temperature monitoring module inputs the temperature data collected by the temperature sensors into the data processing module.

[0055] As a preferred implementation of this embodiment, see Figure 5 , the external circuit breaker control module includes a circuit breaker state detection unit and a circuit breaker opening and closing control unit;

[0056] The circuit breaker state detection unit is an independent circuit breaker detection circuit, which is electrically connected to the circuit breaker. The circuit breaker detection circuit is provided with a plurality of high-precision, low-temperature drift large-resistance voltage divider resistors to divide the circuit breaker voltage signal and then input it into the optical coupler. The optical coupler outputs the circuit breaker state signal to the processor, so as to realize real-time monitoring of the circuit breaker working state.

[0057] The circuit breaker opening and closing control unit adopts an ultra-small power relay with a 10A contact switching capacity, a set of normally open conversion contacts, standard printed circuit board lead pins, complies with UL\ROHS\CQC and other standard requirements, and has a mechanical durability of 500,000 times. The circuit breaker opening and closing control unit controls the opening and closing of the circuit breaker according to the circuit breaker status signal and preset conditions.

[0058] As a preferred implementation of this embodiment, see Figure 6 The communication module adopts a new generation of low-power, high-reliability 4G CAT1 module, which is widely used in remote meter reading communication and Internet of Things communication equipment in the power industry; it supports a maximum downlink rate of 10Mbps and a maximum uplink rate of 5Mbps, ultra-small size, and ultra-high cost performance. It also supports standard communication protocols (such as Modbus, MQTT, etc.) and implements data encryption and identity authentication mechanisms to ensure the security and integrity of data transmission.

[0059] As a preferred implementation of this embodiment, the data processing module includes a main control MCU unit, a display unit and an alarm unit;

[0060] The main control MCU unit is used for data processing, logic control and algorithm implementation. Figure 4The main control MCU unit is an ultra-low power MCU with a wide voltage operating range designed to extend the battery life of portable measurement systems. It integrates a 12-bit 1Msps high-precision SARADC and a rich set of communication peripherals such as comparators, op amps, built-in high-performance PWM timers, multiple UARTs, SPI, I2C, etc. It also has built-in AES, TRNG and other information security modules. It has the characteristics of high integration, high anti-interference, high reliability and ultra-low power consumption. The core adopts Cortex-M0+. -The M0+ processor is derived from the Cortex-M0 and includes a 32-bit RISC processor with a computing power of 0.95 Dhrystone MIPS / MHz. It also incorporates a number of new designs, including improved debugging and tracing capabilities, reduced number of instruction cycles (IPCs), improved two-stage pipelines for Flash access, and energy-saving and consumption-reducing technologies. The Cortex-M0+ processor fully supports the integrated Keil & IAR debuggers;

[0061] The display unit is used to display battery data. The display unit adopts a 0.36-inch four-digit digital tube with high quality, low power consumption, easy IC compatibility, and stable and reliable operation;

[0062] The alarm unit is used to generate an audible and visual alarm when the real-time voltage data or real-time temperature data of the battery exceeds a preset threshold value, and at the same time send the alarm information to a remote terminal through the communication module;

[0063] The data processing module also includes a 12-bit high-precision ADC unit.

[0064] As a preferred implementation of this embodiment, the device further includes a power module;

[0065] See also Figure 7 The power module adopts a very reliable and efficient switching power supply solution verified by long-term field operation. It has a wide working power supply voltage range, strong anti-interference ability, good power supply clutter and noise suppression effect, is suitable for long-term work and is stable, and has good adaptability to the working environment and can meet the requirements of use in all regions of the country; the high-cost-effective flyback switching power supply system with ultra-low standby power consumption is a high-performance, peripheral component-simplified AC-DC conversion switching power supply. The chip provides extremely comprehensive and excellent performance intelligent protection functions. Through the hybrid technology of three pulse power regulation modes of Hi-mode, Eco-mode, and Burst-mode and the low-power structure technology of special devices, it achieves ultra-low standby power consumption and optimal efficiency under the full voltage range; and has good EMI performance.

[0066] As a preferred implementation of this embodiment, the shell material of this device adopts high-strength, corrosion-resistant and weather-resistant engineering plastics to ensure that the device can maintain structural integrity and normal functions in harsh environments such as extreme weather, vibration, and impact.

[0067] In the embodiments of the present application, "at least one" refers to one or more, and "more than one" refers to two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can represent the existence of A alone, the existence of A and B at the same time, and the existence of B alone. Among them, A and B can be singular or plural. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. "At least one of the following" and similar expressions refer to any combination of these items, including any combination of single or plural items. For example, at least one of a, b and c can be represented by: a, b, c, a and b, a and c, b and c, or a and b and c, where a, b, c can be single or multiple.

[0068] Those of ordinary skill in the art will appreciate that the various units and algorithm steps described in the embodiments disclosed herein can be implemented in a combination of electronic hardware, computer software, and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0069] Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working processes of the systems, devices and units described above can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0070] In several embodiments provided in the present application, if any function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art or the part of the technical solution, can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in each embodiment of the present application. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (Read-Only Memory; hereinafter referred to as: ROM), random access memory (Random Access Memory; hereinafter referred to as: RAM), disk or optical disk, and other media that can store program codes.

[0071] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. An online reliability detection device for distributed DC power supply batteries in a distribution network, characterized in that: It includes a voltage monitoring module, a temperature monitoring module, a data processing module, an external circuit breaker control module and a communication module; The voltage monitoring module is used to collect real-time voltage data of the battery; The temperature monitoring module is used to collect real-time temperature data of the battery; The external circuit breaker control module is used to control the opening and closing of the battery external circuit breaker; The communication module is used to control the device to communicate data with the remote terminal; The data processing module is electrically connected to the voltage monitoring module, the temperature monitoring module, the external circuit breaker control module and the communication module respectively. The data processing module is used to perform battery reliability detection based on the real-time voltage data and real-time temperature data of the battery, and transmit the battery reliability detection result to the remote terminal through the communication module, and receive remote terminal commands through the communication module.

2. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The voltage monitoring module is connected to the positive and negative electrodes of the battery; The voltage monitoring module is provided with a plurality of voltage-dividing resistors to divide the battery voltage signal respectively, and an RC filter circuit is provided to filter the voltage signal after the voltage division. The filtered voltage signal is then input into the operational amplifier after overvoltage protection through the bidirectional diode. The operational amplifier amplifies the regulated voltage signal and inputs it into the data processing module.

3. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The temperature monitoring module is provided with RS485 and RS232 local communication interfaces, and is connected to a plurality of temperature sensors through the local communication interfaces. The temperature sensors are respectively arranged inside and outside the battery pack. The temperature monitoring module inputs the temperature data collected by the temperature sensors into the data processing module.

4. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The external circuit breaker control module includes a circuit breaker state detection unit and a circuit breaker opening and closing control unit; The circuit breaker state detection unit is an independent circuit breaker detection circuit, which is electrically connected to the circuit breaker. The circuit breaker detection circuit is provided with a plurality of voltage-dividing resistors to divide the circuit breaker voltage signal and then input it into the optical coupler. The optical coupler outputs the circuit breaker state signal, thereby realizing the monitoring of the circuit breaker working state; The circuit breaker opening and closing control unit controls the opening and closing of the circuit breaker according to the circuit breaker state signal and preset conditions.

5. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The communication module supports 4G Cat1 communication protocol, standard communication protocol and encrypted transmission of data.

6. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The data processing module includes a main control MCU unit, a display unit and an alarm unit; The main control MCU unit is used for data processing, logic control and algorithm implementation; The display unit is used to display battery data; The alarm unit is used to generate an audible and visual alarm when the real-time voltage data or real-time temperature data of the battery exceeds a preset threshold, and at the same time send the alarm information to a remote terminal through a communication module.

7. The online detection device for reliability of distributed DC power supply batteries in a power distribution network according to claim 1, characterized in that: The device also includes a power supply module.

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