Thermal battery equivalent device with remote monitoring function

Abstract

The invention discloses a thermal battery equivalent device with a remote monitoring function. The device comprises a direct-current power supply conversion module A, a control circuit module B, a connector C and a monitoring serial port D, wherein the input end of the direct-current power supply conversion module A is connected with an external power supply, the output end of the direct-current power supply conversion module A is connected with the control circuit module B, the input end of the control circuit module B is connected with an activation signal on the connector, and the output end of the control circuit module B is connected with the monitoring serial port D. According to the invention, the effect of a real thermal battery in the development, test and production process can be replaced, the cost is reduced, and meanwhile, the safety in the test process is improved.

Description

Technical Field

[0001] The present invention belongs to the field of experimental instruments and relates to a thermal battery equivalent device, in particular to a thermal battery equivalent device which can simulate the thermal battery action process and can be remotely monitored. Background Art

[0002] Thermal batteries use molten salt as electrolyte, utilize the temperature of heat source to melt the solid electrolyte and activate it, and provide rated voltage and current to the outside as a primary reserve battery. They have the characteristics of high specific energy and specific power, long storage life, wide operating temperature range, rapid and reliable activation, no need for additional maintenance and care during use, and strong resistance to overload shock and vibration. They are widely used in modern military fields, especially in the field of rockets.

[0003] Thermal batteries power the rocket's onboard systems. To ensure the correct and reliable design of the thermal battery control system circuit, multiple tests are required. Since thermal batteries are irreversible after activation and are single-use products, repeated verification tests using real thermal batteries and frequent replacement of thermal batteries would result in excessive testing costs. Furthermore, current simulation tests use a manual DC power supply to set up the environment for joint debugging, which is unsafe and could affect other test steps and test results. Summary of the Invention

[0004] The purpose of the present invention is to overcome the existing technical problems and provide an equivalent device that simulates the working process of a thermal battery. This device can replace the real thermal battery to carry out various tests and experiments in the product development and production process, solving the problem of high cost of real thermal battery testing. At the same time, the working status of the thermal battery can be remotely monitored, ensuring the stable activation of the thermal battery while also improving safety.

[0005] In order to ensure the above purpose is achieved, the technical solution adopted by the present invention is:

[0006] A thermal battery equivalent device with remote monitoring capability according to the present invention comprises a DC power conversion module A, a control circuit module B, a connector C, and a monitoring serial port D. The input of the DC power conversion module A is connected to an external power source, the output of the DC power conversion module A is connected to the control circuit module B, and the output of the control circuit module B is connected to the monitoring serial port D.

[0007] The DC power conversion module A includes a DC power supply A1, a DC power supply A2 and a DC power supply A3.

[0008] The connector C includes a connector C1 and a connector C2.

[0009] The control circuit module B includes an information processing module B1, a switch control circuit B2, and an LED display module B3. The input of information processing module B1 receives an activation signal from connector C1, and its output is connected to switch control circuit B2, LED display module B3, and monitoring serial port D. The input of switch control circuit B2 is connected to DC power supply A1, and its output is connected to connector C2.

[0010] The information processing module B1 includes a thermal battery equivalent resistor B11, an information acquisition unit B12, an isolation device B13, and an information processing unit B14.

[0011] One end of the thermal battery equivalent resistor B11 is connected to the positive electrode of the activation signal in the connector C1, and the other end is connected to the negative electrode of the activation signal in the connector C1. The input end of the information acquisition unit B12 is connected to the two ends of the thermal battery equivalent resistor B11, and the output end is connected to the isolation device B13. The output of the isolation device B13 is connected to the information processing unit B14, and the information processing unit B14 is connected to the DC power supply A3.

[0012] The control end of the switch control circuit B2 is connected to the output end of the information processing module B1, the input end of the switch control circuit B2 is connected to the positive electrode of the DC power supply A1, and the output end of the switch control circuit B2 is connected to the connector C2.

[0013] The LED display module B3 includes an LED indicator light B31, an LED indicator light B32, and an LED indicator light B33. The output end of the information processing unit B14 is connected to the LED indicator light B31 and the LED indicator light B32 respectively.

[0014] The connector C1 includes an activation signal positive electrode C11 and an activation signal negative electrode C12 , and the thermal battery equivalent resistor B11 is connected to the activation signal positive electrode C11 and the activation signal negative electrode C12 , respectively.

[0015] The connector C2 includes an output power positive electrode C21 and an output power negative electrode C22. The output power positive electrode C21 is connected to the positive output terminal of the switch control circuit B2, and the output power negative electrode C22 is connected to the negative output terminal of the switch control circuit B2.

[0016] The input end of the monitoring serial port D is connected to the output end of the information processing unit B14, and the output end of the monitoring serial port is connected to the remote control device and the host computer.

[0017] Beneficial effects:

[0018] The present invention can replace thermal batteries in product development, testing, production and other testing processes, thereby reducing testing costs. By using electronic circuits to simulate the working process of thermal batteries, the invention can be repeatedly used, with the advantages of low cost, high safety and good reliability.

[0019] The present invention can monitor the duration of the voltage and current values ​​of the activated thermal battery in real time, more realistically simulate the working process of the thermal battery from activation to completion, and can intuitively reflect the defects of the thermal battery control system loop. The thermal battery equivalent device is not a disposable device and can be reused, which can improve the safety of the research and development, experiment and testing process and reduce the cost of research and development, experiment and testing.

[0020] The present invention is mainly used for experimental verification of the development and production process of rocket weapon systems. Compared with existing devices and technologies, the present invention can simulate the working process of a thermal battery from activation to output current, and by detecting activation current, current duration and other methods, through LED display, it can detect and discover defects in the system circuit, and by detecting the serial port, it can remotely monitor the working status of the thermal battery, further ensuring safety during research and development, experimentation and testing. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a system block diagram of the thermal battery equivalent device of the present invention;

[0022] Figure 2 This is a schematic diagram of the system circuit of the thermal battery equivalent device of the present invention;

[0023] Figure 3 This is the circuit design diagram of the information acquisition unit B12 in the thermal battery effect device;

[0024] Figure 4 This is a circuit design diagram of the information processing unit B14 in the thermal battery effect device;

[0025] Figure 5 This is the design diagram of the monitoring serial port D in the thermal battery effect device. DETAILED DESCRIPTION

[0026] In order to better understand the present invention, the technical solution of the present invention is further described below by taking a thermal battery with an activation current of 5A as an example.

[0027] Example

[0028] like Figure 1 As shown, a thermal battery equivalent device with remote monitoring function includes: a DC power conversion module A, a control circuit module B, a connector C and a monitoring serial port D.

[0029] like Figure 2 As shown, the DC power conversion module A includes a DC power supply A1, a DC power supply A2, and a DC power supply A3. The input terminal of DC power supply A1 is connected to an external 220V AC voltage, the input terminal of DC power supply A2 is connected to the output terminal of DC power supply A1, the input terminal of DC power supply A3 is connected to the output terminal of DC power supply A2, and the output terminal of DC power supply A3 is connected to the information processing unit B14.

[0030] The connector C includes a connector C1 and a connector C2. The connector C1 includes an activation signal positive electrode C11 and an activation signal negative electrode C12. The connector C2 includes an output power positive electrode C21 and an output power negative electrode C22.

[0031] Control circuit module B includes an information processing module B1, a switch control circuit B2, and an LED display module B3. The input of information processing module B1 receives activation signal C11 from connector C1, while its output is connected to switch control circuit B2, LED display module B3, and monitoring serial port D. The input of switch control circuit B2 is connected to DC power supply A1, while its output is connected to connector C2.

[0032] The information processing module B1 includes a thermal battery equivalent resistor B11, an information acquisition unit B12, an isolation device B13, and an information processing unit B14. One end of the thermal battery equivalent resistor B11 is connected to the positive activation signal electrode C11 in the connector C1, and the other end is connected to the negative activation signal electrode C12 in the connector C1. The input end of the information acquisition unit B12 is connected to both ends of the thermal battery equivalent resistor B11, and the output end is connected to the isolation device B13, which can effectively prevent the previous circuit from affecting the information processing unit B14. The output of the isolation device B13 is connected to the information processing unit B14, and the information processing unit B14 is connected to the DC power supply A3.

[0033] The control end of the switch control circuit B2 is connected to the output end of the information processing unit B14, the input end of the switch control circuit B2 is connected to the positive electrode of the DC power supply A1, and the output end of the switch control circuit B2 is connected to the connector C2.

[0034] The LED display module B3 includes an LED indicator light B31, an LED indicator light B32, and an LED indicator light B33. The output end of the information processing unit B14 is connected to the LED indicator light B31, the LED indicator light B32, and the LED indicator light B33 respectively.

[0035] The input end of the monitoring serial port D is connected to the output end of the information processing unit B14, and the output end of the monitoring serial port D is connected to the remote control device and the host computer, so as to achieve the purpose of remotely monitoring the working status of the thermal battery.

[0036] Design requirements and working process of a thermal battery equivalent device with remote monitoring function:

[0037] (1) The entire device is powered by a 220V AC power supply. The input end of the DC power supply A1 is directly connected to the 220V AC power supply to generate a 28V voltage that simulates the output of the thermal battery. The input end of the DC power supply A2 is connected to the output end of the DC power supply A1 to generate a 5V voltage to power the information acquisition unit B12. The input end of the DC power supply A3 is connected to the output end of the DC power supply A2 to generate a 3.3V voltage to power the information processing unit B14.

[0038] (2) Figure 2 The thermal battery equivalent resistor B11 shown is a 1Ω / 50W resistor to meet the 5A activation current requirement. The circuit design of the information acquisition unit B12 and the information processing unit B14 is as follows: Figure 3 、 Figure 4 shown.

[0039] R77 and R78 are sampling resistors with a sampling input impedance of 110K, which will not cause potential connectivity to the power supply signal. R77 and R78 are 100K / W and 10K / W respectively. When a voltage signal reflecting the current is formed at both ends of the sampling resistor, it is sent to the acquisition chip of the information acquisition unit B12.

[0040] The acquisition chip in the acquisition circuit uses ADI's INA226, with a power supply voltage of 5V and an acquisition voltage range of 0-36V; 28V isolated sampling, a sampling frequency of 400Hz, and the sampling results are connected to the isolation device B13 through the I2C interface, and then the sampling results are sent to the information processing unit B14 through the isolation device B13.

[0041] (3) According to the above information, the isolation device B13 and the information processing unit B14 need to have an I2C interface. The information processing unit B14 uses an ARM processor, using the STM32H743ZIT6 series produced by ST, with an operating frequency of 400MHz, a double-precision processor and L1 cache, 16Kbytes of data, 16Kbytes of instruction cache, 1MB of internal RAM, up to 168 I / O ports, and interrupt reset and power management capabilities. The processor reads the AD value in a 2.5ms cycle and continuously makes judgments. When the detected current exceeds the minimum effective activation current of 5A and the duration exceeds the minimum effective duration of 150ms, it outputs an effective control signal to control the switch control circuit B2, so that the positive and negative poles of its output end are connected. At this time, the LED indicator B31 lights up; otherwise, the output LED indicator B31 does not light up. The LED indicator B32 lights up when the processor is working normally. Otherwise, if the processor has an abnormality, the LED indicator B32 does not light up. The LED indicator B33 lights up when a high level is detected, otherwise it does not light up.

[0042] (4) After the information processing unit B14 outputs a valid control signal, the positive and negative output terminals of the switch control circuit B2 are connected, and the output terminal of the DC power supply A1 is connected to the output power positive terminal C21 and the output power negative terminal C22 of the connector C2 through the switch control circuit B2, outputting power, thereby simulating the entire working process of the thermal battery from activation to output current.

[0043] (5) Figure 5 As shown in the figure, the serial port module interface chip uses ADI's ADM2582E, a fully integrated isolated data transceiver with ±15kV ESD protection function, suitable for high-speed and efficient communication applications on multi-point transmission lines. It includes an integrated isolated DC / DC power supply, eliminating the need for an external DC / DC isolation module. The device has current limiting and overtemperature shutdown features, which can prevent output short circuits and excessive power consumption due to bus contention.

Claims

1. A thermal battery equivalent device with remote monitoring function, characterized in that: It includes a DC power conversion module A, a control circuit module B, a connector C and a monitoring serial port D; wherein the input end of the DC power conversion module A is connected to an external power supply, the output end of the DC power conversion module A is connected to the control circuit module B, and the output end of the control circuit module B is connected to the monitoring serial port D; The DC power conversion module A includes a DC power supply A1, a DC power supply A2 and a DC power supply A3; The connector C includes a connector C1 and a connector C2; The control circuit module B includes an information processing module B1, a switch control circuit B2, and an LED display module B3; the input end of the information processing module B1 receives an activation signal from the connector C1, and the output end is connected to the switch control circuit B2, the LED display module B3, and the monitoring serial port D; the input end of the switch control circuit B2 is connected to the DC power supply A1, and the output end is connected to the connector C2; The information processing module B1 includes a thermal battery equivalent resistor B11, an information acquisition unit B12, an isolation device B13, and an information processing unit B14; One end of the thermal battery equivalent resistor B11 is connected to the positive electrode of the activation signal in the connector C1, and the other end is connected to the negative electrode of the activation signal in the connector C1. The input end of the information acquisition unit B12 is connected to both ends of the thermal battery equivalent resistor B11, and the output end is connected to the isolation device B13. The output of the isolation device B13 is connected to the information processing unit B14, and the information processing unit B14 is connected to the DC power supply A3. The control terminal of the switch control circuit B2 is connected to the output terminal of the information processing module B1, the input terminal of the switch control circuit B2 is connected to the positive electrode of the DC power supply A1, and the output terminal of the switch control circuit B2 is connected to the connector C2; The LED display module B3 includes an LED indicator light B31, an LED indicator light B32, and an LED indicator light B33. The output end of the information processing unit B14 is connected to the LED indicator light B31 and the LED indicator light B32 respectively. The connector C1 includes an activation signal positive electrode C11 and an activation signal negative electrode C12, and the thermal battery equivalent resistor B11 is connected to the activation signal positive electrode C11 and the activation signal negative electrode C12 respectively; Connector C2 includes an output power positive electrode C21 and an output power negative electrode C22. The output power positive electrode C21 is connected to the positive output terminal of the switch control circuit B2, and the output power negative electrode C22 is connected to the negative output terminal of the switch control circuit B2. The input end of the monitoring serial port D is connected to the output end of the information processing unit B14, and the output end of the monitoring serial port is connected to the remote control device and the host computer.

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