Air pressure detection circuit and energy storage device

Abstract

The utility model relates to an air pressure detection circuit and an energy storage device. The air pressure detection circuit comprises an air pressure sensor, a micro-control unit and a clock circuit; the micro-control unit is respectively connected with the clock circuit and the air pressure sensor; the clock circuit outputs a clock signal to the micro-control unit; the air pressure sensor outputs air pressure data to the micro-control unit. The air pressure detection circuit can work stably under the condition that burrs exist in the enable signal, and the safety and reliability of the battery pack are improved.

Description

Technical Field

[0001] This application relates to the field of air pressure detection technology, specifically to an air pressure detection circuit and an energy storage device. Background Technology

[0002] With the development of new energy technologies, batteries are being used in more and more fields, such as new energy vehicles, robots, and drones powered by batteries.

[0003] Currently, barometric pressure sensor chips are commonly used to detect the air pressure inside the battery pack, and the presence of thermal runaway in the battery pack is determined based on the air pressure inside the battery pack.

[0004] However, if the barometric pressure sensor chip receives an enable signal with glitches, the program may freeze, affecting the safety of the battery pack. Utility Model Content

[0005] To address the aforementioned issues, this application provides a pressure detection circuit and an energy storage device. The pressure detection circuit can operate stably even when there are glitches in the enable signal, thereby improving the safety and reliability of the battery pack.

[0006] Firstly, this application provides a pressure detection circuit. The pressure detection circuit includes a pressure sensor, a microcontroller unit, and a clock circuit; the microcontroller unit is connected to both the clock circuit and the pressure sensor; the clock circuit outputs a clock signal to the microcontroller unit; and the pressure sensor outputs pressure data to the microcontroller unit. In the technical solution of this application embodiment, since the clock circuit is directly connected to the microcontroller unit, even if the pressure detection circuit receives an enable signal with glitches, the enable signal will not affect the clock signal. Therefore, the microcontroller unit can operate accurately according to the clock signal, reducing the risk of program freeze. Furthermore, the stable operation and accurate detection of the pressure inside the battery pack by the microcontroller unit can provide timely alerts when thermal runaway occurs in the battery pack, thereby improving the safety and reliability of the battery pack.

[0007] In some embodiments, the air pressure detection circuit further includes a filtering circuit and a trigger control circuit; a first terminal of the filtering circuit is connected to the trigger control circuit, and a second terminal of the filtering circuit is connected to the enable signal terminal of the air pressure detection circuit; the trigger control circuit is disposed between the clock circuit and the microcontroller unit; the filtering circuit receives the enable signal input from the enable signal terminal and outputs a filtered enable signal to the trigger control circuit, thereby enabling or disabling the connection between the clock circuit and the microcontroller unit. In the technical solution of this application embodiment, the filtering circuit is used to filter the enable signal, removing glitches in the enable signal and preventing the enable signal from affecting the clock signal. This allows the pointer of the microcontroller unit's storage address to operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0008] In some embodiments, the filtering circuit includes a first flip-flop; the clock terminal of the first flip-flop is connected to the enable signal terminal, and the output terminal of the first flip-flop is connected to the trigger control circuit. In the technical solution of this application embodiment, by locking the output signal through the first flip-flop, glitches in the enable signal can be filtered out, preventing glitches in the enable signal from affecting the clock signal. This allows the pointer of the microcontroller's storage address to operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0009] In some embodiments, the filtering circuit includes a delay circuit and a second flip-flop; a first terminal of the delay circuit is connected to an enable signal terminal, and a second terminal of the delay circuit is connected to the clock terminal of the second flip-flop; the input terminal of the second flip-flop is connected to the enable signal terminal, and the output terminal of the second flip-flop is connected to a trigger control circuit. In the technical solution of this application embodiment, by using the delay circuit in conjunction with the second flip-flop, glitches in the enable signal can be filtered out, preventing glitches in the enable signal from affecting the clock signal. This allows the pointer of the microcontroller's storage address to operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0010] In some embodiments, the filtering circuit includes a first resistor, a second resistor, a first capacitor, and a second capacitor; a first end of the first resistor is connected to an enable signal terminal, and a second end of the first resistor is connected to the first end of the second resistor; a second end of the second resistor is connected to a trigger control circuit; a first end of the first capacitor is connected to the common terminal of the first and second resistors, and a second end of the first capacitor is grounded; a first end of the second capacitor is connected to the second end of the second resistor, and a second end of the second capacitor is grounded. In the technical solution of this application embodiment, the low-pass filter circuit composed of resistors and capacitors can filter out high-frequency noise in the enable signal, preventing glitches in the enable signal from affecting the clock signal, so that the pointer of the microcontroller's storage address can operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0011] In some embodiments, the trigger control circuit includes a trigger circuit and a logic switch; the trigger circuit is connected to both the filter circuit and the logic switch; the logic switch is also connected to the clock circuit and the microcontroller unit. In the technical solution of this application embodiment, the combination of the trigger circuit and the logic switch to turn the clock circuit on or off from the microcontroller unit makes the on / off state more stable, reduces the risk of false on / off, and thus improves the operational stability of the microcontroller unit.

[0012] In some embodiments, the air pressure detection circuit further includes a communication circuit; the communication circuit is connected to the data signal terminal and clock signal terminal of the microcontroller and the air pressure detection circuit, respectively. In the technical solution of this application embodiment, communication between the microcontroller and an external controller of the air pressure detection circuit is achieved through the communication circuit, which can expand the communication interface and realize more complex command or data transmission.

[0013] In some embodiments, the air pressure detection circuit further includes an analog-to-digital converter circuit; the analog-to-digital converter circuit is connected to both the air pressure sensor and the microcontroller unit. In the technical solution of this application embodiment, converting the voltage data obtained by the air pressure sensor through the analog-to-digital converter circuit reduces the data processing load and difficulty of the microcontroller unit, thereby improving the air pressure detection efficiency of the microcontroller unit.

[0014] In some embodiments, the barometric pressure sensor includes a micro-electro-mechanical systems (MEMS) sensor. In the technical solutions of this application, the MEMS sensor has advantages such as small size, light weight, low power consumption, mass production capability, high integration, good compatibility, and reliable performance. Using a MEMS sensor can improve the various performance characteristics of the barometric pressure detection circuit.

[0015] Secondly, this application also provides an energy storage device, which includes an energy storage device and a pressure detection circuit as described in the first aspect.

[0016] In the technical solution of this application embodiment, even if the air pressure detection circuit receives an enable signal with glitches, the enable signal will not affect the clock signal. The air pressure detection circuit can work stably and accurately detect the air pressure in the energy storage device, thereby providing timely warning when thermal runaway occurs in the energy storage device, thus improving the safety and reliability of the energy storage device. Attached Figure Description

[0017] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the alternative embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0018] Figure 1 This is one of the structural schematic diagrams of a pressure detection circuit according to an embodiment of this application;

[0019] Figure 2 This is a second schematic diagram of the structure of a pressure detection circuit according to an embodiment of this application;

[0020] Figure 3 This is one of the structural schematic diagrams of a filter circuit according to an embodiment of this application;

[0021] Figure 4 This is a second schematic diagram of the structure of a filter circuit according to an embodiment of this application;

[0022] Figure 5 This is the third schematic diagram of the structure of a filter circuit according to an embodiment of this application;

[0023] Figure 6 This is the third schematic diagram of the structure of a pressure detection circuit according to an embodiment of this application;

[0024] Figure 7 This is the fourth schematic diagram of the structure of a pressure detection circuit according to an embodiment of this application;

[0025] Figure 8 This is the fifth schematic diagram of the structure of a pressure detection circuit according to an embodiment of this application;

[0026] Figure 9 This is a schematic diagram of the structure of an energy storage device according to an embodiment of this application.

[0027] Explanation of reference numerals in the attached figures:

[0028] Air pressure detection circuit 10, air pressure sensor 11, microcontroller unit MCU, clock circuit 12;

[0029] Filter circuit 13, trigger control circuit 14, first flip-flop D1;

[0030] Delay circuit 131, second flip-flop D2;

[0031] First resistor R1, second resistor R2, first capacitor C1, second capacitor C2;

[0032] Trigger circuit 141, logic switch 142, communication circuit 15, analog-to-digital converter (ADC);

[0033] Energy storage device 01, energy storage component 20. Detailed Implementation

[0034] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0036] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0037] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0038] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0039] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0040] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0041] With the development of new energy technologies, batteries are being applied in more and more fields, such as battery-powered new energy vehicles, robots, and drones. Currently, barometric pressure sensor chips are commonly used to detect the air pressure inside the battery pack to determine whether thermal runaway has occurred. However, if the barometric pressure sensor chip receives an enable signal with glitches, it may cause the pointer at the stored address to malfunction, easily leading to program freezes. Once the barometric pressure sensor chip program freezes and cannot be reset in time, the air pressure inside the battery pack will not be detected, making it impossible to determine whether thermal runaway has occurred, thus affecting the safety of the battery pack.

[0042] To address the aforementioned issues, this application provides a pressure detection circuit comprising a pressure sensor, a microcontroller unit (MCU), and a clock circuit. The MCU is connected to both the clock circuit and the pressure sensor. The clock circuit outputs a clock signal. The MCU performs pressure detection based on the clock signal and the pressure data collected by the pressure sensor. Since the clock circuit is directly connected to the MCU, even if the pressure detection circuit receives an enable signal with glitches, this enable signal will not affect the clock signal. The accurate and stable clock signal input to the MCU causes the pointer at the MCU's storage address to operate accurately according to the clock signal, thereby reducing the risk of program crashes. The stable operation of the pressure detection circuit allows for accurate detection of the pressure within the battery pack, providing timely alerts in the event of thermal runaway, thus improving the safety and reliability of the battery pack.

[0043] According to some embodiments of this application, refer to Figure 1 A barometric pressure detection circuit is provided. The barometric pressure detection circuit 10 includes a barometric pressure sensor 11, a microcontroller unit (MCU), and a clock circuit 12; the MCU is connected to both the clock circuit 12 and the barometric pressure sensor 11; the clock circuit 12 outputs a clock signal to the MCU; and the barometric pressure sensor 11 outputs barometric pressure data to the MCU.

[0044] In this embodiment of the application, the air pressure detection circuit 10 includes an air pressure sensor 11, a microcontroller unit (MCU) and a clock circuit 12, with the MCU connected to the air pressure sensor 11 and the clock circuit 12 respectively.

[0045] The air pressure sensor 11 detects air pressure to obtain air pressure data and transmits the data to the microcontroller unit (MCU). The clock circuit 12 generates a clock signal and transmits it to the MCU. The MCU receives the clock signal and runs a detection program based on it. This program performs air pressure detection based on the air pressure data and obtains a result. This result indicates whether an air pressure abnormality has occurred. The MCU can then transmit the detection result to an external controller connected to the air pressure detection circuit 10, allowing the controller to take timely measures based on the result, such as disconnecting the battery pack from the load device or outputting an alarm message.

[0046] In the above embodiments, the air pressure detection circuit includes an air pressure sensor, a microcontroller unit, and a clock circuit; the clock circuit outputs a clock signal to the microcontroller unit; and the air pressure sensor outputs air pressure data to the microcontroller unit. In the technical solution of this application embodiment, since the clock circuit is directly connected to the microcontroller unit, even if the air pressure detection circuit receives an enable signal with glitches, the enable signal will not affect the clock signal. Therefore, the microcontroller unit can operate accurately according to the clock signal, reducing the risk of program freeze. Furthermore, the stable operation and accurate detection of the air pressure inside the battery pack by the microcontroller unit can provide timely alerts when thermal runaway occurs in the battery pack, thereby improving the safety and reliability of the battery pack.

[0047] According to some embodiments of this application, refer to Figure 2 The air pressure detection circuit 10 also includes a filter circuit 13 and a trigger control circuit 14. The first end of the filter circuit 13 is connected to the trigger control circuit 14, and the second end of the filter circuit 13 is connected to the enable signal terminal SSN of the air pressure detection circuit 10. The trigger control circuit 14 is located between the clock circuit 12 and the microcontroller unit MCU. The filter circuit 13 receives the enable signal input from the enable signal terminal SSN and outputs the filtered enable signal to the trigger control circuit 14, so that the trigger control circuit 14 turns on or off the connection between the clock circuit 12 and the microcontroller unit MCU.

[0048] In this embodiment, the air pressure detection circuit 10 includes a filter circuit 13 and a trigger control circuit 14. The first terminal of the filter circuit 13 is connected to the trigger control circuit 14, and the second terminal of the filter circuit 13 is connected to the enable signal terminal SSN of the air pressure detection circuit 10; the trigger control circuit 14 is disposed between the clock circuit 12 and the microcontroller unit MCU.

[0049] The air pressure detection circuit 10 receives an enable signal from the enable signal terminal SSN, which is then transmitted to the filter circuit 13 for filtering. If there are glitches in the enable signal, the filter circuit 13 will filter out the glitches to obtain the filtered enable signal.

[0050] The filter circuit 13 is connected to the trigger control circuit 14. After filtering, the filter circuit 13 inputs a glitch-free enable signal to the trigger control circuit 14. The trigger control circuit 14, based on the glitch-free enable signal, either connects the clock circuit 12 to the microcontroller unit (MCU) or disconnects the clock circuit 12 from the MCU.

[0051] Since the enable signal after filtering out glitches will not affect the signal transmission between the clock circuit 12 and the microcontroller unit MCU, that is, it will not affect the clock signal, the clock signal can be transmitted to the microcontroller unit MCU stably and accurately, so that the pointer of the microcontroller unit MCU storage address can run accurately, thereby reducing the risk of program freezing in the microcontroller unit MCU.

[0052] In the above embodiments, the air pressure detection circuit further includes a filtering circuit and a trigger control circuit. The filtering circuit receives the enable signal input from the enable signal terminal and outputs a filtered enable signal to the trigger control circuit, enabling the trigger control circuit to turn on or off the connection between the clock circuit and the microcontroller unit. In the technical solution of this application embodiment, the filtering circuit is used to filter the enable signal, removing glitches in the enable signal and preventing the enable signal from affecting the clock signal. This allows the pointer of the microcontroller unit's storage address to operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0053] According to some embodiments of this application, refer to Figure 3 The filter circuit 13 includes a first flip-flop D1; the clock terminal CP of the first flip-flop D1 is connected to the enable signal terminal SSN, and the output terminal Q of the first flip-flop D1 is connected to the trigger control circuit 14.

[0054] In this embodiment of the application, the filter circuit 13 includes a first flip-flop D1, the clock terminal CP of the first flip-flop D1 is connected to the enable signal terminal SSN, and the output terminal Q of the first flip-flop D1 is connected to the trigger control circuit 14.

[0055] The enable signal is transmitted from the enable signal terminal SSN of the air pressure detection circuit 10 to the clock terminal CP of the first flip-flop D1. The first flip-flop D1 can lock the signal at the output terminal Q according to the enable signal input at the clock terminal CP to obtain the glitch-filtered enable signal. Then, the trigger control circuit 14 connects the clock circuit 12 and the microcontroller unit MCU according to the glitch-filtered enable signal, or disconnects the clock circuit 12 and the microcontroller unit MCU.

[0056] In the above embodiments, the filtering circuit includes a first flip-flop; in the technical solution of this application embodiment, by locking the output signal through the first flip-flop, glitches in the enable signal can be filtered out, avoiding glitches in the enable signal from affecting the clock signal, so that the pointer of the storage address of the microcontroller unit can operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit MCU.

[0057] According to some embodiments of this application, refer to Figure 4 The filter circuit 13 includes a delay circuit 131 and a second flip-flop D2; the first terminal of the delay circuit 131 is connected to the enable signal terminal SSN, and the second terminal of the delay circuit 131 is connected to the clock terminal CP of the second flip-flop D2; the input terminal D of the second flip-flop D2 is connected to the enable signal terminal SSN, and the output terminal Q of the second flip-flop D2 is connected to the trigger control circuit 14.

[0058] In this embodiment, the filter circuit 13 includes a delay circuit 131 and a second flip-flop D2. The delay circuit 131 is connected to the enable signal terminal SSN of the air pressure detection circuit 10 and the clock terminal CP of the second flip-flop D2. The input terminal D of the second flip-flop D2 is connected to the enable signal terminal SSN, and the output terminal Q is connected to the trigger control circuit 14.

[0059] The enable signal is transmitted from the enable signal terminal SSN of the air pressure detection circuit 10 to the delay circuit 131. The delay circuit 131 can delay the enable signal and transmit the delayed enable signal to the second flip-flop D2. The delay duration is adjustable, and optionally, the delay duration is set to 50μs.

[0060] For example, if a glitch exists in the enable signal, and the duration of the glitch is less than the delay duration of the delay circuit 131, when the glitch has not yet been transmitted to the clock input CP of the second flip-flop D2, the clock input CP of the second flip-flop D2 receives a low-level signal, and the input D of the second flip-flop D2 receives a high-level signal, then the second flip-flop D2 outputs a low-level signal. When the glitch is transmitted to the clock input CP of the second flip-flop D2, the input D of the second flip-flop D2 receives a low-level signal, and the second flip-flop D2 still outputs a low-level signal, thus filtering out all glitches.

[0061] If there is a glitch in the enable signal and the duration of the glitch is greater than the delay duration of the delay circuit 131, both the clock terminal CP and the input terminal D of the second flip-flop D2 will receive a high-level signal, and the output terminal Q of the second flip-flop D2 will be a high-level signal.

[0062] In the above embodiments, the filtering circuit includes a delay circuit and a second flip-flop. In the technical solution of this application embodiment, by cooperating with the delay circuit and the second flip-flop, the effect of filtering out glitches in the enable signal can be achieved, avoiding the glitches in the enable signal from affecting the clock signal, so that the pointer of the storage address of the microcontroller unit can operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit MCU.

[0063] According to some embodiments of this application, refer to Figure 5 The filter circuit 13 includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2. The first end of the first resistor R1 is connected to the enable signal terminal SSN, and the second end of the first resistor R1 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is connected to the trigger control circuit 14. The first end of the first capacitor C1 is connected to the common terminal of the first resistor R1 and the second resistor R2, and the second end of the first capacitor C1 is grounded. The first end of the second capacitor C2 is connected to the second end of the second resistor R2, and the second end of the second capacitor C2 is grounded.

[0064] In this embodiment, the filter circuit 13 includes a first resistor R1, a second resistor R2, a first capacitor C1, and a second capacitor C2. The first end of the first resistor R1 is connected to the enable signal terminal SSN, and the second end of the first resistor R1 is connected to the first end of the second resistor R2; the second end of the second resistor R2 is connected to the trigger control circuit 14.

[0065] The enable signal is transmitted from the enable signal terminal SSN of the air pressure detection circuit 10 to the first resistor R1, and then to the second resistor R2. The first capacitor C1 and the second capacitor C2 can filter the high-frequency noise in the enable signal, so that the second terminal of the second resistor R2 outputs the filtered enable signal.

[0066] In the above embodiments, the filtering circuit includes a first resistor, a second resistor, a first capacitor, and a second capacitor. In the technical solution of this application embodiment, the low-pass filter circuit composed of resistors and capacitors can filter out high-frequency noise in the enable signal, preventing glitches in the enable signal from affecting the clock signal. This allows the pointer of the microcontroller's storage address to operate accurately according to a stable and accurate clock signal, thereby reducing the risk of program freezing in the microcontroller unit (MCU).

[0067] According to some embodiments of this application, refer to Figure 6 The trigger control circuit 14 includes a trigger circuit 141 and a logic switch 142; the trigger circuit 141 is connected to the filter circuit 13 and the logic switch 142 respectively; the logic switch 142 is also connected to the clock circuit 12 and the microcontroller unit MCU.

[0068] In this embodiment, the trigger control circuit 14 includes a trigger circuit 141 and a logic switch 142. The trigger circuit 141 is connected to the filter circuit 13 and the logic switch 142 respectively; the logic switch 142 is disposed between the clock circuit 12 and the microcontroller unit MCU.

[0069] The filter circuit 13 inputs the filtered enable signal to the trigger circuit 141. The trigger circuit 141 transmits a first control signal to the logic switch 142 based on the filtered enable signal. Under the control of the first control signal, the logic switch 142 connects the clock circuit 12 to the microcontroller unit (MCU). Alternatively, the trigger circuit 141 transmits a second control signal to the logic switch 142 based on the filtered enable signal. Under the control of the second control signal, the logic switch 142 disconnects the clock circuit 12 from the microcontroller unit (MCU).

[0070] In the above embodiments, the trigger control circuit includes a trigger circuit and a logic switch. In the technical solution of this application, the clock circuit is connected to the microcontroller unit by the cooperation of the trigger circuit and the logic switch, which makes the connection or disconnection more stable, reduces the risk of false connection or false disconnection, and thus improves the working stability of the microcontroller unit.

[0071] According to some embodiments of this application, refer to Figure 7 The air pressure detection circuit 10 also includes a communication circuit 15; the communication circuit 15 is connected to the data signal terminals MOSI (Master Output Slave Input) and MISO (Master Input Slave Output) and the clock signal terminal SCLK of the microcontroller MCU and the air pressure detection circuit 10, respectively.

[0072] In this embodiment of the application, the air pressure detection circuit 10 further includes a communication circuit 15, which enables the microcontroller unit (MCU) to communicate with a controller outside the air pressure detection circuit 10.

[0073] For example, the microcontroller unit (MCU) transmits the detection result to the communication circuit 15, and the communication circuit 15 transmits the detection result to the controller through the data signal terminal MISO; or, the controller transmits the air pressure threshold to the communication circuit 15 through the data signal terminal MOSI, and the communication circuit 15 transmits the air pressure threshold to the microcontroller unit (MCU) so that the microcontroller unit (MCU) can perform air pressure detection based on the air pressure threshold.

[0074] It should be noted that the data transmitted by the communication circuit 15 is not limited to detection results and air pressure thresholds, and can be set according to the actual situation.

[0075] The communication circuit 15 is also connected to the enable signal terminal SSN and the clock signal terminal SCLK of the air pressure detection circuit 10. It receives the enable signal from the enable signal terminal SSN and the system clock signal from the clock signal terminal SCLK, and performs control functions such as working, sleeping, and stopping operation based on the enable signal and the system clock signal.

[0076] In the above embodiments, the air pressure detection circuit also includes a communication circuit; in the technical solution of this application embodiment, the communication circuit realizes the communication between the microcontroller and the controller outside the air pressure detection circuit, which can expand the communication interface and realize more complex instruction or data transmission.

[0077] According to some embodiments of this application, refer to Figure 8 The air pressure detection circuit 10 also includes an analog-to-digital converter (ADC); the ADC is connected to the air pressure sensor 11 and the microcontroller unit (MCU).

[0078] In this embodiment, the air pressure detection circuit 10 further includes an analog-to-digital converter (ADC), which is located between the air pressure sensor 11 and the microcontroller unit (MCU).

[0079] The barometric pressure sensor 11 acquires voltage data from the barometric pressure and transmits the voltage data to the analog-to-digital converter (ADC). The ADC performs analog-to-digital conversion on the voltage data to obtain barometric pressure data, which is then transmitted to the microcontroller unit (MCU). The MCU performs barometric pressure detection based on the barometric pressure data.

[0080] In the above embodiments, the air pressure detection circuit further includes an analog-to-digital conversion circuit; in the technical solution of this application embodiment, the voltage data obtained by the air pressure sensor is converted by the analog-to-digital conversion circuit, which can reduce the data processing volume and data processing difficulty of the microcontroller unit, thereby improving the air pressure detection efficiency of the microcontroller unit.

[0081] According to some embodiments of this application, the pressure sensor 11 includes a microelectromechanical system (MEMS) sensor.

[0082] Microelectromechanical systems (MEMS) refers to an engineering technology that combines precision mechanical systems with microelectronic circuit technology. Its size is generally on the micrometer scale.

[0083] In the technical solutions of this application embodiment, MEMS sensors have advantages such as small size, light weight, low power consumption, mass production capability, high integration, good compatibility, and reliable performance. Using MEMS sensors can improve the various performance characteristics of the air pressure detection circuit.

[0084] According to some embodiments of this application, refer to Figure 9An energy storage device is provided. The energy storage device 01 includes an energy storage device and a pressure detection circuit 10 as described in the above embodiment.

[0085] In this embodiment, the energy storage device includes a pressure detection circuit 10 and an energy storage device 20. The pressure detection circuit 10 includes a pressure sensor 11, a microcontroller unit (MCU), and a clock circuit 12. The pressure sensor 11 can be packaged together with the energy storage device 20. For example, if the energy storage device 20 is a battery, the pressure sensor 11 and the battery can be packaged together to form a battery pack. In this way, the pressure sensor 11 can collect the air pressure in the battery pack and transmit the air pressure data to the MCU. The MCU performs air pressure detection based on the clock signal and the air pressure data.

[0086] In some embodiments, the air pressure detection circuit 10 further includes a filter circuit 13 and a trigger control circuit 14; the filter circuit 13 can filter the enable signal input at the enable signal terminal SSN and transmit the filtered enable signal to the trigger control circuit 14; under the control of the filtered enable signal, the trigger control circuit 14 can turn on or off the connection between the clock circuit 12 and the microcontroller unit MCU.

[0087] In the above embodiments, the energy storage device includes an energy storage component and a pressure detection circuit; the pressure detection circuit is used to detect the pressure inside the energy storage device. In the technical solution of this application embodiment, even if the pressure detection circuit receives an enable signal with glitches, the enable signal will not affect the clock signal. The pressure detection circuit can work stably and accurately detect the pressure inside the energy storage device, thereby providing timely warnings when thermal runaway occurs in the energy storage device, thus improving the safety and reliability of the energy storage device.

[0088] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0089] The embodiments described above are merely illustrative of several implementation methods of this application, intended to facilitate a detailed understanding of the technical solutions of this application, but should not be construed as limiting the scope of protection of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this application, and these all fall within the scope of protection of this application. It should be understood that technical solutions obtained by those skilled in the art based on the technical solutions provided in this application through logical analysis, reasoning, or limited experimentation are all within the scope of protection of the appended claims. Therefore, the scope of protection of this patent application should be determined by the content of the appended claims, and the specification and drawings can be used to interpret the content of the claims.

Claims

1. An air pressure detecting circuit characterized by comprising: The air pressure detection circuit comprises an air pressure sensor, a micro control unit and a clock circuit; The micro control unit is connected with the clock circuit and the air pressure sensor respectively; The clock circuit outputs a clock signal to the micro control unit; The air pressure sensor outputs air pressure data to the micro control unit.

2. The air pressure detecting circuit according to claim 1, characterized by, The air pressure detection circuit further comprises a filter circuit and a trigger control circuit; The first end of the filter circuit is connected with the trigger control circuit, and the second end of the filter circuit is connected with an enable signal end of the air pressure detection circuit; the trigger control circuit is arranged between the clock circuit and the micro control unit; The filter circuit receives an enable signal input from the enable signal end and outputs a filtered enable signal to the trigger control circuit, so that the trigger control circuit turns on or cuts off the connection between the clock circuit and the micro control unit.

3. The air pressure detecting circuit according to claim 2, characterized by, The filter circuit comprises a first flip-flop; The clock end of the first flip-flop is connected with the enable signal end, and the output end of the first flip-flop is connected with the trigger control circuit.

4. The air pressure detecting circuit according to claim 2, wherein The filter circuit comprises a delay circuit and a second flip-flop; The first end of the delay circuit is connected with the enable signal end, and the second end of the delay circuit is connected with the clock end of the second flip-flop; The input end of the second flip-flop is connected with the enable signal end, and the output end of the second flip-flop is connected with the trigger control circuit.

5. The air pressure detecting circuit according to claim 2, wherein The filter circuit comprises a first resistor, a second resistor, a first capacitor and a second capacitor; The first end of the first resistor is connected with the enable signal end, and the second end of the first resistor is connected with the first end of the second resistor; The second end of the second resistor is connected with the trigger control circuit; The first end of the first capacitor is connected with the common end of the first resistor and the second resistor, and the second end of the first capacitor is grounded; The first end of the second capacitor is connected with the second end of the second resistor, and the second end of the second capacitor is grounded.

6. The air pressure detecting circuit according to claim 2, wherein The trigger control circuit comprises a trigger circuit and a logic switch; The trigger circuit is connected with the filter circuit and the logic switch respectively; The logic switch is further connected with the clock circuit and the micro control unit.

7. The air pressure detection circuit according to any one of claims 1 to 6, characterized by, The air pressure detection circuit further comprises a communication circuit; The communication circuit is connected with the micro control unit and the data signal end and the clock signal end of the air pressure detection circuit respectively.

8. The air pressure detection circuit according to any one of claims 1 to 6, characterized by, The air pressure detection circuit further comprises an analog-to-digital conversion circuit; The analog-to-digital conversion circuit is connected with the air pressure sensor and the micro control unit respectively.

9. The air pressure detection circuit according to any one of claims 1 to 6, characterized by, The air pressure sensor comprises a micro electro mechanical system sensor.

10. An energy storage device, characterized by, The energy storage device comprises an energy storage device and the air pressure detection circuit according to any one of claims 1-9.

Images