Interactive pressure detector

Abstract

According to the interactive pressure detector, a power supply module is combined with an intelligent low-power-consumption design, standby power consumption is effectively reduced, long-term stable operation is ensured, a pressure acquisition module adopts an integrated signal processing design, high-precision linear output of wide-range pressure is realized, an MCU processing module can accurately identify an abnormal state under a complex working condition, and the detection precision is improved. The communication module, the wake-up module and the external request module are linked to construct a two-way response mechanism, alarm signals and pressure value historical data can be uploaded in real time through a CAN protocol, external request signals can be received to achieve remote control, the system interaction flexibility is enhanced, the data storage function of the MCU processing module is deeply combined with abnormal monitoring logic, and the system reliability is improved. The pressure change trend before and after an event is completely recorded, a reliable basis is provided for fault diagnosis, all the modules form a closed-loop control system under a low-power-consumption framework, and the system has the functions of high sensitivity, high precision, low power consumption, CAN communication and awakening and is suitable for scenes such as electric automobiles and energy storage systems.

Description

Technical Field

[0001] This invention belongs to the field of battery testing technology, specifically relating to pressure monitoring inside a battery pack, and more specifically to an interactive pressure detector. Background Technology

[0002] In the field of new energy vehicles and energy storage systems, internal pressure monitoring of battery packs is a crucial step in preventing safety risks such as thermal runaway and gas leaks. Current technologies often employ a combination of discrete sensors and independent processing units, a design with significant drawbacks: firstly, discrete components result in bulky devices that are difficult to fit into compact battery pack installation spaces; secondly, signal transmission relies on multi-stage conversion circuits, causing communication delays and data loss, affecting timely warnings of abnormal conditions; and thirdly, the continuous high power consumption of the sensors and main control unit exacerbates the system's energy burden, failing to meet energy efficiency standards for vehicle-mounted equipment. Furthermore, existing independent pressure sensors generally lack deep integration with the Battery Management System (BMS), unable to proactively report emergency events via a reverse wake-up mechanism or respond to external commands for data interaction, resulting in information silos between the monitoring system and the higher-level control unit. Therefore, developing a pressure detection device that combines miniaturization, rapid response, low power consumption, and intelligent interaction capabilities has become an important technological direction for improving the safety management of battery systems. Utility Model Content

[0003] To address the technical problems existing in the background art, this utility model proposes an interactive pressure detector for use inside a battery pack, which has high sensitivity, high precision, low power consumption, CAN communication and wake-up functions, and is suitable for electric vehicles, energy storage systems and other scenarios.

[0004] The objective of this utility model can be achieved through the following technical solutions:

[0005] An interactive pressure detector includes a PCBA board, on which the following are integrated:

[0006] The pressure acquisition module collects ambient pressure in real time and outputs an analog voltage signal corresponding to the pressure value.

[0007] The MCU processing module is connected to the pressure acquisition module. It processes the analog voltage signal output by the pressure acquisition module to obtain the pressure value, so as to perform alarm judgment, output alarm signal, and store historical pressure value data for a set period of time before the alarm.

[0008] The communication module connects to the MCU processing module and transmits the alarm signals and historical pressure data output by the MCU processing module to the upper-level device via the CAN communication protocol.

[0009] The power supply module is electrically connected to the pressure acquisition module, MCU processing module, and communication module, respectively, to supply power to each module.

[0010] Furthermore, the pressure acquisition module adopts an integrated pressure sensor probe, including an integrated packaged signal conditioning chip and MEMS chip. The signal conditioning chip calibrates and compensates the signal output by the MEMS chip, converting the acquired pressure signal into an analog voltage signal with a customizable output range.

[0011] Furthermore, the power module has a built-in undervoltage / overvoltage detection circuit that monitors the voltage of the power supply in real time and issues an undervoltage alarm when the voltage exceeds the preset range.

[0012] Furthermore, the PCBA board is also equipped with an external request module, which is connected to the communication module and the MCU processing module respectively. The external request module receives external request signals from the upper-level device through the communication module and notifies the MCU processing module to perform the corresponding operation.

[0013] Furthermore, the PCBA board is also equipped with a wake-up module, which is connected to the MCU processing module, the communication module, and the external request module. The MCU processing module has a low-power mode. When the MCU processing module is in low-power mode, it only performs pressure monitoring and disables other functions. When the wake-up module detects that the pressure value exceeds the preset threshold or receives an external request signal, the wake-up module outputs a wake-up signal to activate the MCU processing module or the upstream device.

[0014] Furthermore, the PCBA board is also equipped with a connector integration assembly, which integrates a power interface, a CAN interface and a sensor interface to provide a physical interface for the connection between various virtual modules. The sensor interface adopts an M aviation plug and has a built-in PTFE breathable membrane.

[0015] Furthermore, the pressure detector also includes a base plate and a top cover, with the top cover fixedly mounted on the base plate and the PCBA board adapted and connected in the cavity between the base plate and the top cover.

[0016] Furthermore, retaining rings are provided on both sides of the base plate, and retaining blocks corresponding to the retaining rings are provided on both sides of the top cover. The top cover and the base plate are connected and fixed by a buckle structure composed of retaining rings and retaining blocks.

[0017] Furthermore, vent holes are provided on the base plate, and the vent holes are located at positions corresponding to the pressure acquisition module to ensure that the pressure inside and outside the cavity is consistent.

[0018] The beneficial effects of this utility model are as follows: The interactive pressure detector provided by this application provides a wide voltage range through the power supply module, supports various vehicle power supply environments, and combines intelligent low-power design to effectively reduce standby power consumption and ensure long-term stable operation. The pressure acquisition module adopts an integrated signal processing design to achieve high-precision linear output of wide-range pressure, which facilitates the MCU processing module to accurately identify abnormal states under complex working conditions. The communication module, wake-up module and external request module work together to build a two-way response mechanism, which can upload alarm signals and historical pressure data in real time through the CAN protocol, and can also receive external request signals to realize remote control, enhancing the system's interactive flexibility. The data storage function of the MCU processing module is deeply integrated with the abnormal monitoring logic to completely record the pressure change trend before and after the event, providing a reliable basis for fault diagnosis. The various modules of this application form a closed-loop control system under the low-power framework, with high sensitivity, high precision, low power consumption, CAN communication and wake-up functions, and are suitable for electric vehicles, energy storage systems and other scenarios. Attached Figure Description

[0019] Figure 1 This is a three-dimensional schematic diagram of the present invention.

[0020] Figure 2 This is an exploded view of the present invention.

[0021] Figure 3 This is a schematic diagram illustrating the interaction between this utility model and the superior equipment. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0023] like Figure 1-2As shown, this utility model provides an interactive pressure detector, including a base plate 1, a top cover 2, and a PCBA board 3. The top cover 2 is fixedly installed on the base plate 1, and the PCBA board 3 is adapted and connected in the cavity between the base plate 1 and the top cover 2. The structure is compact and lightweight, with dimensions of 6*3.7*1.8cm. Both the base plate 1 and the top cover 2 are composed of PBT resin + 20% GF, which has the characteristics of high strength, high rigidity, and excellent creep resistance. The heat distortion temperature (HDT) can reach over 200℃, and the operating temperature meets -40~120℃, making it suitable for vehicle and energy storage environments. Two sets of retaining rings 11 are provided on both sides of the base plate 1, and two sets of retaining blocks 21 are provided on both sides of the top cover 2, corresponding to the two sets of retaining rings 11. The top cover 2 and the base plate 1 are connected and fixed by a buckle structure composed of retaining rings 11 and retaining blocks 21. The inverted double buckle design achieves simple and quick assembly while ensuring tight closure. The surface of the outer shell is designed with vent holes 12 to ensure consistent internal and external pressure. Ventilation holes are provided on the base plate 1 to ensure that the pressure inside and outside the cavity is consistent.

[0024] like Figure 3 As shown, PCBA board 3 integrates a pressure acquisition module, an MCU processing module, a communication module, a wake-up module, an external request module, a power supply module, and a connector integration component.

[0025] The pressure acquisition module acquires ambient pressure in real time and outputs an analog voltage signal corresponding to the pressure value. Specifically, the pressure acquisition module uses an integrated pressure sensor probe, including an integrated packaged signal conditioning chip and a MEMS chip. The signal conditioning chip calibrates and compensates the signal output by the MEMS chip, converting pressure signals from 10kPa to 500kPa into an analog voltage signal with a customizable output range (0V-5V). It features small size, large range, and high accuracy, enabling high-precision acquisition of environmental pressure. The acquired data is monitored in real time by an MCU.

[0026] The MCU processing module, connected to the pressure acquisition module, processes the analog voltage signal output by the pressure acquisition module to obtain the pressure value. This value is used to perform alarm judgment, output an alarm signal, and store historical pressure value data for a set time period prior to the alarm. Specifically, when the MCU processing module detects abnormal pressure value data, it executes an alarm operation, outputs an alarm signal, and uploads it to the upper-level BMS device via CAN communication. Abnormal pressure value data refers to pressure value data continuously exceeding a preset threshold within a preset time period. The MCU processing module also has a storage function, continuously storing and overwriting pressure value data during the monitoring process. It can store all pressure value data monitored within the most recent 10 minutes, thus enabling the simultaneous uploading of pressure value data from the 10 minutes prior to the alarm to the upper-level BMS device when issuing an alarm signal. This allows the upper-level BMS device to further analyze the data and make accurate judgments and decisions.

[0027] The communication module connects to the MCU processing module and transmits the alarm signals and historical pressure data output by the MCU processing module to the upper-level device via the CAN communication protocol.

[0028] The external request module is connected to both the communication module and the MCU processing module. It receives external request signals from the upper-level BMS device through the communication module and notifies the MCU processing module to perform corresponding operations. For example, when the external request module receives a data call request from the upper-level BMS device, it notifies the MCU processing module to upload the historical pressure value data for the corresponding time period. When the external request module receives a stop monitoring request from the upper-level BMS device, it notifies the MCU processing module to stop monitoring the pressure data.

[0029] The wake-up module connects to the MCU processing module, communication module, and external request module. The MCU processing module has a low-power mode. When in low-power mode, the MCU processing module only performs pressure monitoring, disabling other functions. In this mode, the pressure detector power consumption is less than 50uA, significantly reducing power consumption and achieving energy saving. When the wake-up module detects that the pressure value exceeds a preset threshold, it outputs a wake-up signal to activate the MCU processing module. The MCU processing module then activates all functions and continuously analyzes the monitored pressure value data within a preset time period. If the pressure value is abnormal, an alarm operation is executed, and an alarm signal is output. The wake-up module then outputs another wake-up signal to wake up the upstream device and uploads the alarm signal via CAN communication. If the pressure value is normal, the MCU processing module returns to low-power mode. When the wake-up module receives an external request signal, it outputs a wake-up signal to activate the MCU processing module, enabling it to perform the corresponding operation.

[0030] The power supply module is electrically connected to the pressure acquisition module, MCU processing module, communication module, external request module, and wake-up module, providing power to each module. Specifically, the power supply module has a wide voltage range, supporting 5-32V, and is highly adaptable, compatible with approximately 90% of the voltage ranges available on the market. The power supply module has a built-in undervoltage / overvoltage detection circuit that monitors the power supply voltage in real time, issuing an undervoltage alarm when the voltage exceeds a preset range. The power supply module also has a sleep function; when the MCU processing module enters low-power mode, the power supply module enters sleep mode, with a typical operating voltage of 12V and a current ≤50uA.

[0031] The connector integration assembly integrates a power interface, a CAN interface, and a sensor interface, providing a physical interface for the connection between various virtual modules. The sensor interface adopts an M12 aviation plug and has a built-in PTFE breathable membrane. The vent 12 is set at the position corresponding to the pressure acquisition module to ensure that the ambient pressure around the pressure sensing module is consistent with the ambient pressure outside the cavity.

[0032] In its actual operation, under normal circumstances, the power module enters sleep mode, while only the MCU processing module operates in low-power mode. The pressure acquisition module continuously monitors ambient pressure at a low sampling rate, with the overall power consumption of the pressure detector ≤50μA. When the pressure acquisition module detects that the pressure value exceeds a preset threshold, the wake-up module immediately activates the MCU processing module, simultaneously increasing the sampling rate of the pressure acquisition module for high-precision data verification. If the threshold is exceeded continuously within a specified time period, it is considered abnormal. The MCU automatically locks the historical pressure data from the 10 minutes prior to the alarm and prioritizes uploading the alarm signal and complete data packet via the CAN interface of the communication module, while simultaneously waking up the upstream BMS device. If the data returns to normal, the MCU processing module re-enters low-power mode. Furthermore, when the external request module receives instructions from the upstream BMS device (such as data retrieval or parameter modification) or a local trigger signal, it also wakes up the MCU to execute the corresponding operation, automatically switching back to low-power mode upon completion. The power module monitors the input voltage (5-32V) throughout the process and triggers an independent alarm channel when an abnormality occurs. The communication module updates the system status synchronously during event processing to ensure closed-loop control of the entire process of pressure data acquisition, analysis, storage and transmission, ultimately achieving highly reliable, low-power real-time pressure monitoring and intelligent response in the vehicle environment.

[0033] The above description is merely an example and illustration of the structure of this utility model. Those skilled in the art can make various modifications or additions to the specific embodiments described or use similar methods to replace them, as long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of this utility model.

Claims

1. An interactive pressure detector, comprising a PCBA board (3), characterized in that, The PCBA board (3) integrates the following settings: The pressure acquisition module collects ambient pressure in real time and outputs an analog voltage signal corresponding to the pressure value. The MCU processing module is connected to the pressure acquisition module. It processes the analog voltage signal output by the pressure acquisition module to obtain the pressure value, so as to perform alarm judgment, output alarm signal, and store historical pressure value data for a set period of time before the alarm. The communication module connects to the MCU processing module and transmits the alarm signals and historical pressure data output by the MCU processing module to the upper-level device via the CAN communication protocol. The power supply module is electrically connected to the pressure acquisition module, MCU processing module, and communication module, respectively, to supply power to each module.

2. The pressure detector according to claim 1, characterized in that, The pressure acquisition module uses an integrated pressure sensor probe, which includes an integrated packaged signal conditioning chip and a MEMS chip. The signal conditioning chip calibrates and compensates the signal output by the MEMS chip, converting the acquired pressure signal into an analog voltage signal with a customizable output range.

3. The pressure detector according to claim 1, characterized in that, The power module has a built-in undervoltage / overvoltage detection circuit that monitors the voltage of the power supply in real time and issues an undervoltage alarm when the voltage exceeds the preset range.

4. The pressure detector according to claim 1, characterized in that, The PCBA board (3) is also equipped with an external request module. The external request module is connected to the communication module and the MCU processing module respectively. It receives the external request signal from the upper-level device through the communication module and notifies the MCU processing module to perform the corresponding operation.

5. The pressure detector according to claim 4, characterized in that, The PCBA board (3) is also equipped with a wake-up module. The wake-up module is connected to the MCU processing module, the communication module and the external request module respectively. The MCU processing module has a low power mode. When the MCU processing module is in the low power mode, the MCU processing module only performs pressure monitoring and shuts down other functions. When the wake-up module detects that the pressure value data exceeds the preset threshold or receives an external request signal, the wake-up module outputs a wake-up signal to activate the MCU processing module or the upper-level device.

6. The pressure detector according to claim 5, characterized in that, The PCBA board (3) is also equipped with a connector integration component, which integrates a power interface, a CAN interface and a sensor interface to provide a physical interface for the connection between various virtual modules.

7. The pressure detector according to claim 1, characterized in that, Also includes: The base plate (1) and the top cover (2) are fixedly installed on the base plate (1). The PCBA board (3) is adapted and connected in the cavity between the base plate (1) and the top cover (2).

8. The pressure detector according to claim 7, characterized in that, Both sides of the base plate (1) are provided with retaining rings (11), and both sides of the top cover (2) are provided with retaining blocks (21) corresponding to the retaining rings (11). The top cover (2) and the base plate (1) are connected and fixed by a buckle structure composed of retaining rings (11) and retaining blocks (21).

9. The pressure detector according to claim 8, characterized in that, A vent hole (12) is provided on the base plate (1). The vent hole (12) is set at a position corresponding to the pressure acquisition module so that the pressure inside and outside the cavity is consistent.

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