Temperature detection method, system and device and storage medium

Abstract

The invention provides a temperature detection method, system and device and a storage medium, and relates to the technical field of signal measurement. The method comprises the steps that a driving signal is received, the driving signal is used for triggering an MDFC to conduct signal feedback, a return signal carrying temperature information is generated based on the driving signal, and the return signal and the driving signal are different in frequency.

Description

Technical Field

[0001] This application relates to the technical field of signal measurement, and particularly relates to a temperature detection method, system, device, and storage medium. Background Art

[0002] An energy storage battery bin is a device for storing and protecting energy storage batteries, mainly storing lithium battery cells. There are risks such as over-discharge, over-voltage, and overheating during storage or use. Therefore, it is necessary to monitor the temperature status of the battery cells in a timely manner.

[0003] In the prior art, wireless temperature detection of batteries is mainly achieved through wireless temperature sensors. The wireless temperature sensors detect temperature information and then send the temperature information to a processor, and the processor obtains the battery temperature based on the temperature information.

[0004] However, in the prior art, there is a problem of co-frequency interference easily generated when wireless temperature sensors receive and send signals. The wireless temperature sensors and the processor cannot receive complete and accurate signals, thereby reducing the accuracy of the battery temperature detection result. Summary of the Invention

[0005] This application provides a temperature detection method, system, device, and storage medium, which can improve the accuracy of the temperature detection result.

[0006] To achieve the above object, this application adopts the following technical solutions:

[0007] In a first aspect, this application provides a temperature detection method, which is applied to a microwave driven frequency conversion (MDFC). The method includes:

[0008] Receiving a drive signal, and generating a feedback signal carrying temperature information based on the drive signal.

[0009] Wherein, the drive signal is used to trigger the MDFC to perform signal feedback, and the feedback signal and the drive signal are of different frequencies.

[0010] In the technical solution provided by this application, the MDFC generates a feedback signal carrying temperature information according to the drive signal, realizing wireless temperature detection. The MDFC has strong anti-interference ability, low signal processing delay and energy consumption, effectively ensuring signal quality and the efficiency of the temperature detection process; at the same time, it is convenient to deploy and is convenient for accurately detecting the temperature inside the three-dimensional stacked battery bin; in addition, through signal conversion by the MDFC, the feedback signal and the drive signal are of different frequencies, effectively reducing the co-frequency interference problem, ensuring signal transmission quality, and thereby improving the accuracy of the temperature detection result.

[0011] A possible implementation method is to generate a feedback signal carrying temperature information based on a driving signal. It can be specifically implemented as follows: obtain the temperature information corresponding to the detection point, generate a frequency signal corresponding to the temperature information based on the temperature information, and modulate the frequency signal onto the driving signal to obtain the feedback signal. The feedback signal is directly obtained by modulating the driving signal and the frequency signal corresponding to the temperature information, enabling the frequency signal to better adapt to the signal transmission scenario, while distinguishing the frequencies of the driving signal and the feedback signal to achieve non-same frequencies for the driving signal and the feedback signal.

[0012] Another possible implementation method is to generate a frequency signal corresponding to the temperature information based on the temperature information. It can be specifically implemented as follows: generate a measured capacitance value corresponding to the temperature information according to the correlation between the temperature information and the capacitance value, and output a frequency signal based on the measured capacitance value. Here, the measured capacitance value refers to the capacitance value corresponding to the temperature information. The change in the capacitance value reflects the change in the temperature information, and a frequency signal corresponding to the temperature information is output. The frequency signal has a fast response speed to the change in the capacitance value and is sensitive to small changes in the capacitance value, achieving real-time detection of the temperature and improving the accuracy of the temperature detection result.

[0013] Another possible implementation method is that there is a negative correlation or a positive correlation between the temperature information and the capacitance value. Through the correlation between the temperature information and the capacitance value, real-time monitoring of the temperature is achieved, providing timely and accurate temperature information.

[0014] Another possible implementation method is to modulate the frequency signal onto the driving signal to obtain the feedback signal. It can be specifically implemented as follows: perform mixing modulation on the frequency signal and the driving signal to obtain the feedback signal. Through mixing modulation, the frequency of the frequency signal is converted to a frequency band adjacent to the driving signal, with relatively high modulation sensitivity and low noise.

[0015] Another possible implementation method is to perform mixing modulation on the frequency signal and the driving signal to obtain the feedback signal. It can be specifically implemented as follows: mix the frequency signal and the driving signal to obtain a sum frequency signal and a difference frequency signal, and use the sum frequency signal or the difference frequency signal as the feedback signal. Here, the sum frequency signal refers to the signal obtained by adding the frequencies of the driving signal and the frequency signal, and the difference frequency signal refers to the signal obtained by subtracting the frequency of the frequency signal from the frequency of the driving signal. Selecting one signal component after mixing modulation as the feedback signal reduces the complexity of signal transmission and reduces the interference between multiple signals.

[0016] Another possible implementation method is to obtain the temperature information corresponding to the detection point through a capacitive passive sensor. The temperature information is detected by a passive temperature sensor, eliminating the need for an external battery to power the temperature sensor, reducing the charge and discharge times of the battery, increasing the service life of the battery, and reducing the safety hazards during the use of the battery.

[0017] In a second aspect, a temperature detection system is provided. The system includes an MDFC. The MDFC includes a temperature sensor and an MDFC circuit. The temperature sensor and the MDFC circuit are electrically connected.

[0018] The above-mentioned temperature sensor is used to detect temperature information.

[0019] The MDFC circuit is used to receive a driving signal.

[0020] The MDFC circuit is also used to generate a feedback signal carrying temperature information based on the driving signal.

[0021] The driving signal is used to trigger the MDFC circuit for signal feedback, and the feedback signal and the driving signal have different frequencies.

[0022] The technical solution provided by the present application detects temperature information through a temperature sensor, and then generates a return signal carrying temperature information according to a driving signal through an MDFC circuit, thereby realizing wireless temperature detection. The MDFC circuit has strong anti-interference capability, low signal processing delay and energy consumption, and effectively guarantees the signal quality and the efficiency of the temperature detection process; at the same time, it is easy to deploy, and is convenient for accurate temperature detection inside a three-dimensionally stacked battery compartment; in addition, the MDFC circuit performs signal conversion, so that the return signal and the driving signal are of different frequencies, effectively reducing the same-frequency interference problem, ensuring the signal transmission quality, and thus improving the accuracy of the temperature detection result.

[0023] In a possible implementation, the MDFC circuit is further used to generate a frequency signal corresponding to the temperature information based on the temperature information, and modulate the frequency signal onto the driving signal to obtain a return signal. The return signal is directly modulated by the driving signal and the frequency signal corresponding to the temperature information, so that the frequency signal can better adapt to the signal transmission scenario, and at the same time distinguish the frequencies of the driving signal and the return signal, so that the driving signal and the return signal have different frequencies.

[0024] In another possible implementation, the temperature sensor is further used to generate a measured capacitance value corresponding to the temperature information according to the correlation between the temperature information and the capacitance value, and the measured capacitance value refers to the capacitance value corresponding to the temperature information. The MDFC circuit is further used to output a frequency signal according to the measured capacitance value. The change of the temperature information is reflected by the change of the capacitance value, and the frequency signal corresponding to the temperature information is output. The frequency signal has a fast response speed to the change of the capacitance value and is more sensitive to the slight change of the capacitance value, so that the real-time detection of the temperature is realized, and the accuracy of the temperature detection result is improved.

[0025] In another possible implementation, the temperature information and the capacitance value are negatively correlated or positively correlated. By using the correlation between the temperature information and the capacitance value, real-time temperature monitoring is achieved, providing timely and accurate temperature information.

[0026] In another possible implementation, the above-mentioned MDFC circuit is also used to mix and modulate a frequency signal and a drive signal to obtain a feedback signal. By mixing and modulating, the frequency of the frequency signal is converted to a frequency band close to that of the drive signal, with relatively high modulation sensitivity and low noise.

[0027] In another possible implementation, the above-mentioned MDFC circuit is also used to mix and modulate a frequency signal and a drive signal, outputting a sum frequency signal and a difference frequency signal, and selecting either the sum frequency signal or the difference frequency signal as the feedback signal. Here, the sum frequency signal refers to the signal obtained by adding the frequencies of the drive signal and the frequency signal, and the difference frequency signal refers to the signal obtained by subtracting the frequency of the frequency signal from that of the drive signal. Selecting one of the signal components after mixing and modulation as the feedback signal reduces the complexity of signal transmission and the interference between multiple signals.

[0028] In another possible implementation, the temperature sensor is a capacitive passive sensor. By using the passive temperature sensor to detect temperature information, there is no need for an external battery to power the temperature sensor, reducing the number of charge and discharge cycles of the battery, increasing the service life of the battery, and reducing the safety hazards during battery use.

[0029] In a third aspect, a temperature detection device is provided, which includes: a receiving module and a processing module.

[0030] The above-mentioned receiving module is used to receive a drive signal.

[0031] The above-mentioned processing module is used to generate a feedback signal carrying temperature information based on the drive signal.

[0032] Among them, the drive signal is used to trigger the MDFC for signal feedback, and the feedback signal and the drive signal have different frequencies.

[0033] In a possible implementation, the above-mentioned processing module is also used to generate a frequency signal corresponding to the temperature information based on the temperature information, modulate the frequency signal onto the drive signal, and obtain the feedback signal.

[0034] In another possible implementation, the above-mentioned processing module is also used to generate a measured capacitance value corresponding to the temperature information according to the correlation between the temperature information and the capacitance value. The measured capacitance value refers to the capacitance value corresponding to the temperature information. The above-mentioned MDFC circuit is also used to output a frequency signal according to the measured capacitance value.

[0035] In another possible implementation, the relationship between the temperature information and the capacitance value is a negative correlation or a positive correlation.

[0036] In another possible implementation, the above-mentioned processing module is also used to mix and modulate the frequency signal and the drive signal to obtain the feedback signal.

[0037] In another possible implementation manner, the above processing module is further configured to perform mixing modulation on the frequency signal and the driving signal, output a sum frequency signal and a difference frequency signal, and select the sum frequency signal or the difference frequency signal as the feedback signal. The sum frequency signal refers to the signal obtained by adding the frequencies of the driving signal and the frequency signal, and the difference frequency signal refers to the signal obtained by subtracting the frequency of the frequency signal from the frequency of the driving signal.

[0038] In another possible implementation manner, the temperature measurement sensor is a capacitive passive sensor.

[0039] For the technical effects corresponding to any implementation manner in the third aspect, reference may be made to the technical effects corresponding to any implementation manner in the first aspect above, which will not be elaborated here.

[0040] In a fourth aspect, a computer device is provided. The computer device includes: a processor and a memory. At least one computer program is stored in the memory, and at least one computer program is loaded and executed by the processor to implement the temperature detection method in the above aspect.

[0041] In a fifth aspect, a computer-readable storage medium is provided. At least one computer program is stored in the computer-readable storage medium, and at least one computer program is loaded and executed by the processor to implement the temperature detection method in the above aspect.

[0042] In a sixth aspect, a computer program product is provided. The computer program product includes a computer program or instruction. When the computer program or instruction is executed by the processor, the temperature detection method in the above aspect is implemented.

[0043] The solutions provided in the fourth to sixth aspects above are used to implement the method provided in the first aspect above, and the specific implementation will not be elaborated one by one. For the technical effects corresponding to any implementation manner in the solutions provided in the fourth to sixth aspects above, reference may be made to the technical effects corresponding to any implementation manner in the first aspect above, which will not be elaborated here.

[0044] It should be noted that, on the premise that the solutions are not contradictory, any possible implementation manners in the above aspects can be combined. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 A schematic structural diagram of a computer system provided for an exemplary embodiment;

[0046] Figure 2 A schematic flowchart of a temperature detection method provided for an exemplary embodiment;

[0047] Figure 3 A schematic structural diagram of a temperature detection system provided for an exemplary embodiment;

[0048] Figure 4 Schematic structural diagram of another temperature detection system provided for an exemplary embodiment;

[0049] Figure 5 Schematic structural diagram of a temperature detection device provided for an exemplary embodiment;

[0050] Figure 6 Schematic structural diagram of a computer device provided for an exemplary embodiment. Detailed implementation manners

[0051] In the embodiments of the present application, in order to facilitate the clear description of the technical solutions of the embodiments of the present application, words such as "first" and "second" are used to distinguish identical items or similar items with basically the same functions and roles. Those skilled in the art can understand that the words such as "first" and "second" do not limit the quantity and execution order, and the words such as "first" and "second" do not necessarily limit being different. There is no sequence or size order between the technical features described by the "first" and "second".

[0052] In the embodiments of the present application, words such as "exemplary" or "for example" are used to represent examples, illustrations or explanations. Any embodiment or design solution described as "exemplary" or "for example" in the embodiments of the present application should not be construed as being more preferred or having more advantages than other embodiments or design solutions. Exactly speaking, using words such as "exemplary" or "for example" aims to present relevant concepts in a specific way for easy understanding.

[0053] In the embodiments of the present application, at least one can also be described as one or more, and multiple can be two, three, four or more, which is not limited in the present application.

[0054] In addition, the network architectures and scenarios described in the embodiments of the present application are for more clearly explaining the technical solutions of the embodiments of the present application, and do not constitute a limitation to the technical solutions provided by the embodiments of the present application. Those skilled in the art know that with the evolution of network architectures and the emergence of new service scenarios, the technical solutions provided by the embodiments of the present application are equally applicable to similar technical problems.

[0055] For the convenience of understanding, the nouns involved in the embodiments of the present application are first explained.

[0056] Energy storage battery compartment: It is a dedicated space for storing and managing energy storage batteries, and is applied in fields such as power systems, renewable energy, and electric vehicles. Its main functions include: centrally storing batteries to ensure power supply safety; adjusting environmental temperature and humidity to extend battery life; real-time monitoring of battery status to ensure stable battery operation, etc. In order to real-time monitor the battery status and improve the safety, performance, and lifespan of battery use, etc., a temperature detection device is usually installed in the energy storage battery compartment to measure the temperature on the surface of the battery. The temperature detection device is an important part of the Battery Management System (BMS), which directly affects the monitoring and management effect of the battery.

[0057] MDFC technology: It refers to a technology that directly drives sensors or actuators inside a device through microwave signals to achieve efficient energy utilization. At the same time, by adjusting the frequency of the microwave signal, corresponding functions are realized to optimize the working performance of the device. Specifically, MDFC can generate and modulate microwave signals to meet different needs; it can also directly drive devices such as sensors or actuators to improve the working efficiency of the device. For example, MDFC can be used in the driving process of medical devices to achieve rapid response and precise operation of medical devices; it can also be combined with microprocessors and sensors, etc., to achieve intelligent control of the device. MDFC technology has the advantages of low power consumption, long lifespan, easy deployment, large-scale deployment, improving data acquisition accuracy and efficiency, etc. Specifically, MDFC technology can operate stably for a long time. Through the method of wireless energy transmission, it reduces the demand for energy and lowers the usage cost; compared with traditional Internet of Things technologies, MDFC does not require additional deployment of exciters, greatly simplifies the installation process, reduces the deployment cost, avoids energy loss during the AC-DC conversion process, and makes the device more energy-efficient; at the same time, the large-scale and mass deployment ability of MDFC technology can be widely applied in various industries and fields to meet the large-scale high-precision and high-efficiency data acquisition requirements.

[0058] Wireless sensor: It is a device that autonomously collects environmental data and transmits it to a central processing system or the cloud through a wireless network. It usually includes a sensor and a wireless communication device. The sensor collects environmental data such as temperature, humidity, and gas, and then sends it to the central processing system through the wireless communication device. It is applied in fields such as the Internet of Things (IoT), industrial automation, environmental monitoring, smart home, and medical health, and has the advantages of wireless transmission, low power consumption, and flexible deployment.

[0059] It should be noted that the information involved in this application (including but not limited to device information, personal information of the object, etc.), data (including but not limited to data for analysis, stored data, displayed data, etc.), and signals are all authorized by the object or fully authorized by all parties, and the collection, use, and processing of relevant data need to comply with relevant laws, regulations, and standards. For example, the drive signal, temperature information, feedback signal, etc. involved in this application are all obtained under full authorization.

[0060] The commonly used wireless temperature detection method in the industry is mainly implemented through a radio frequency circuit, which is briefly described below.

[0061] Specifically, the existing temperature detection device includes a temperature sensing component and a radio frequency identification component, and the temperature sensing component and the radio frequency identification component are connected by a wireless signal. The temperature sensing component includes a lithium battery, and a temperature sensor is embedded at the top of the current collector inside the lithium battery. The temperature sensor is built into the lithium battery, and the internal temperature of the lithium battery is measured when the lithium battery is working. The radio frequency identification component includes a reader antenna. Starting the reader antenna will transmit a signal with a certain power to the radio frequency energy collection unit, enabling it to start each integrated unit such as the temperature sensor to work. The measured internal temperature signal of the battery is transmitted to the reader antenna, and then the reader antenna transmits the data to the reader for data decoding to obtain the real-time temperature data and historical temperature data inside the battery.

[0062] However, the temperature sensor and the radio frequency identification component in the above technical solution have the same frequency for uplink and downlink data, which is prone to the problem of co-frequency interference, affecting the data transmission quality, and further affecting the accuracy of the temperature detection result. Therefore, when transmitting data in the above technical solution, only a transceiver with a small power can be used, and the energy that can be received by the antenna is less. This energy can only be used to start the temperature sensor, and the temperature sensor still needs to be powered by the battery under test to operate, resulting in the battery being in a continuous charge and discharge process, shortening the battery life, affecting the normal operation of the battery, and having a large potential safety hazard.

[0063] Based on this, this application provides a temperature detection method. Through MDFC, a feedback signal carrying temperature information is generated based on the drive signal, and the feedback signal is analyzed and processed to obtain the corresponding temperature, realizing wireless temperature detection. MDFC has strong anti-interference ability, low signal processing delay and energy consumption, effectively ensuring signal quality and the efficiency of the temperature detection process; at the same time, it is convenient to deploy and is convenient for accurately detecting the temperature inside the three-dimensional stacked battery compartment; in addition, through signal conversion by MDFC, the feedback signal and the drive signal are not of the same frequency, effectively reducing the co-frequency interference problem, ensuring signal transmission quality, and further improving the accuracy of the temperature detection result.

[0064] The solution provided by this application can be applied to Figure 1In the computer system shown, Figure 1 FIG. 1 is a schematic structural diagram of a computer system provided for an exemplary embodiment. The computer system includes an MDFC 100, a temperature measurement sensor 110, and a base station 120. The MDFC 100 and the temperature measurement sensor 110 are electrically connected, and the MDFC 100 and the base station 120 are communicatively connected.

[0065] Exemplarily, the base station 120 is a device for wireless communication and signal analysis, and is configured to send a driving signal f0 to the MDFC 100. The base station 120 may be a base station in Long Term Evolution (LTE), Long Term Evolution Advanced (LTEA), or an evolved Node B (eNB or eNodeB), a base station device in a 5G network, or a base station in a future communication system (such as 6G), etc. The base station may include various macro base stations, micro base stations, home base stations, remote radio heads, reconfigurable intelligent surfaces (RISs), routers, Wireless Fidelity (WIFI) devices, or various network-side devices such as a primary cell and a secondary cell.

[0066] The MDFC 100 is a device for signal conversion or signal processing. It receives the driving signal f0 sent by the base station 120 through an antenna, generates a feedback signal f1 carrying the temperature information detected by the temperature measurement sensor 110 based on the driving signal f0, and then sends the feedback signal f1 to the base station 120 through the antenna, so that the base station 120 can analyze the temperature information detected by the temperature measurement sensor 100 based on the feedback signal f1 to obtain the temperature value detected by the temperature measurement sensor 100. The temperature measurement sensor 100 is configured to detect the temperature information of the detection point of the battery and send it to the MDFC 100 for processing. Exemplarily, the temperature measurement sensor 100 is a passive sensor and does not require additional power supply. The number of the base station 120, the MDFC 100, and the temperature measurement sensor 110 is not limited to Figure 1 as shown in FIG. 1, and the present application does not limit this.

[0067] Figure 2 FIG. 2 is a schematic flowchart of a temperature detection method provided for an exemplary embodiment. This method can be executed by a computer device. The computer device can be Figure 1 the MDFC in FIG. 1, or other devices that support temperature detection and signal processing.

[0068] As Figure 2 shown, the temperature detection method provided by the embodiments of the present application may include:

[0069] Step S201: The MDFC receives a driving signal.

[0070] Among them, the driving signal is used to trigger the MDFC to perform signal feedback.

[0071] Optionally, the driving signal includes a radio frequency signal, an infrared signal, a microwave signal, an ultrasonic signal, a laser signal, etc.

[0072] Signal feedback means that after receiving the driving signal, the MDFC feeds back a signal carrying temperature information.

[0073] Exemplarily, the MDFC receives a radio frequency signal through an antenna, and filters, amplifies, etc. the radio frequency signal through a filter, an amplifier circuit, etc. to remove noise and interference signals.

[0074] In some embodiments, after receiving the driving signal, the MDFC directly feeds back a pre-generated return signal carrying temperature information; or, after receiving the driving signal, the MDFC generates a return signal carrying temperature information based on the driving signal.

[0075] In some embodiments, after receiving the driving signal, the MDFC extracts and converts the energy of the driving signal to supply energy for the generation of the return signal.

[0076] Exemplarily, the driving signal is extracted through a resonant network, and then the extracted signal is converted into a DC signal through a rectifier circuit to achieve power supply.

[0077] Among them, the resonant network is mainly composed of elements such as inductors, capacitors, and resistors. At a specific frequency, the change frequencies of the current and voltage in the circuit reach a certain specific value, and the energy conversion between the inductor and the capacitor reaches the best state. At this time, resonance occurs in the circuit to achieve the energy conversion of the driving signal.

[0078] Step S202: The MDFC generates a return signal carrying temperature information based on the driving signal.

[0079] Among them, the temperature information refers to the temperature information corresponding to the detection point of the battery.

[0080] The detection point refers to the position for monitoring the battery temperature.

[0081] Optionally, the detection point is located on the outer surface of the battery, such as the surface of the battery cell, the surface of the electrode; or, the detection point is located inside the battery, and the embodiments of the present application do not limit this.

[0082] Exemplarily, the inside of the battery refers to the internal gap between large batteries or battery packs, such as: the internal gap of the lithium-ion battery of an electric vehicle, the internal gap of a three-dimensional stacked battery compartment.

[0083] In some embodiments, temperature information corresponding to a detection point is obtained through a capacitive passive sensor.

[0084] Among them, a passive sensor refers to a sensor that can operate without external power supply.

[0085] Exemplarily, a passive sensor generates corresponding signals by sensing changes in temperature, humidity, etc. in the environment. For example: a thermocouple sensor generates a voltage signal using the temperature difference, a photoelectric sensor generates a current signal using light irradiation of a semiconductor material, and a capacitive humidity sensor generates a capacitance value change signal using humidity changes.

[0086] The feedback signal is used to carry temperature information, and the feedback signal and the drive signal are of different frequencies, reducing the co-frequency interference between signals.

[0087] In some embodiments, the steps for the MDFC to generate a feedback signal based on a drive signal are as follows:

[0088] Step 1: Based on the temperature information, generate a frequency signal corresponding to the temperature information.

[0089] Exemplarily, according to the correlation between temperature information and capacitance value, generate a measured capacitance value corresponding to the temperature information, and then output a frequency signal according to the measured capacitance value.

[0090] Among them, the measured capacitance value refers to the capacitance value corresponding to the temperature information. There is a correlation between the temperature information and the capacitance value, and there is also a correlation between the capacitance value and the frequency signal. Therefore, different temperature information corresponds to different frequency signals.

[0091] For example: The core of a capacitive temperature sensor is a capacitance element sensitive to temperature, and it has the characteristic that the capacitance value of the capacitance element changes with temperature changes.

[0092] Exemplarily, the material of the capacitance element is ceramic, polymer, etc., and its dielectric constant changes with temperature. The capacitance structure of the capacitance element is a parallel plate capacitor or an interdigital capacitor. When the temperature changes, the dielectric constant or the distance between the capacitance plates changes, resulting in a change in the capacitance value.

[0093] For example: The relationship between the capacitance value and the temperature can be expressed by the following formula:

[0094] C(t) = C 0 (1 + α·ΔT)

[0095] Among them, C(t) represents the capacitance at temperature T, C 0 represents the capacitance value at the reference temperature, α represents the temperature coefficient, and ΔT represents the temperature change.

[0096] Another example: The relationship between the capacitance value and the temperature can also be expressed as:

[0097]

[0098] Among them, C represents the capacitance value, ∈ represents the dielectric constant, A represents the plate area, and d represents the plate spacing.

[0099] Exemplarily, there is a negative correlation or a positive correlation between the temperature information and the capacitance value.

[0100] For example: in the case where the sensor is a barium titanate ceramic capacitive temperature sensor, the dielectric constant increases with the increase of temperature, and the capacitance value increases with the increase of temperature. In the case where the sensor is some polymer capacitive temperature sensors, the dielectric constant decreases with the increase of temperature, and the capacitance value decreases with the increase of temperature.

[0101] Specifically, the negative correlation is applicable to temperature detection in a low-temperature environment, and the positive correlation is applicable to temperature detection in a high-temperature environment.

[0102] In some embodiments, the MDFC includes: a temperature measurement sensor and an MDFC circuit. The MDFC detects temperature information through the temperature measurement sensor and outputs a frequency signal through the MDFC circuit.

[0103] Among them, the MDFC circuit is usually composed of a capacitor, an inductor, and a resistor.

[0104] Exemplarily, the capacitive element in the temperature measurement sensor is used as a part of the MDFC circuit, and the change in the capacitance value of the capacitive element is reflected by the change in the frequency output by the MDFC circuit.

[0105] Optionally, the MDFC circuit includes an RC circuit, an LC circuit, a crystal oscillator circuit, etc.

[0106] Exemplarily, the relationship between the output frequency of the RC circuit and the capacitance value is expressed by the following formula:

[0107]

[0108] Among them, f represents the output frequency, R represents the resistance value of the resistor in the MDFC circuit, and C represents the capacitance value.

[0109] Exemplarily, the relationship between the output frequency of the LC circuit and the capacitance value is expressed by the following formula:

[0110]

[0111] Among them, f represents the output frequency, L represents the inductance value of the inductor in the MDFC circuit, and C represents the capacitance value.

[0112] It can be seen from the above formula that there is a negative correlation between the capacitance value and the frequency of the frequency signal output by the MDFC circuit.

[0113] Step 2: Modulate the frequency signal onto the drive signal to obtain a feedback signal, such that the feedback signal carries temperature information (frequency signal).

[0114] Among them, modulation refers to loading the temperature information (frequency signal) onto a drive signal suitable for transmission, effectively resisting interference during signal transmission.

[0115] Optionally, modulation includes amplitude modulation, frequency modulation, phase modulation, etc.

[0116] Exemplarily, mix the frequency signal and the drive signal for mixing modulation to obtain a feedback signal.

[0117] Among them, mix modulation refers to mixing (multiplying) two or more signals to generate new frequency components.

[0118] Exemplarily, the mix modulation process can be expressed by the following formula:

[0119]

[0120] Among them, S out (t) represents the signal obtained after mix modulation, S in (t) represents the drive signal, f in represents the frequency of the drive signal, cos(2πf LO t) represents the frequency signal, f LO represents the frequency of the frequency signal, cos(2π(f in +f Lo )t) represents the frequency component with frequency f in +f LO cos(2π(f in -f LO )t) represents the frequency component with frequency f in -f LO .

[0121] Therefore, mixing the frequency signal and the drive signal can obtain a sum frequency signal and a difference frequency signal. Select the sum frequency signal or the difference frequency signal as the feedback signal, and the sum frequency signal or the difference frequency signal is not of the same frequency as the drive signal.

[0122] Among them, the sum frequency signal refers to the signal obtained by adding the frequencies of the drive signal and the frequency signal. For example: the signal with frequency f in +f LO . The difference frequency signal refers to the signal obtained by subtracting the frequency of the frequency signal from the frequency of the drive signal. For example: the signal with frequency f in -f LO .

[0123] Exemplarily, the sum-frequency signal or the difference-frequency signal is selected by a filter in the MDFC circuit.

[0124] For example: the frequency of the driving signal is 950 MHz, and the frequency of the frequency signal corresponding to the temperature information is 36 MHz. Then the frequency of the sum-frequency signal is 986 MHz, and the frequency of the difference-frequency signal is 914 MHz. The difference-frequency signal can be selected by a low-pass filter with a cut-off frequency of 950 MHz.

[0125] In summary, the temperature detection method provided by this application generates a feedback signal carrying temperature information based on a driving signal through MDFC. While realizing wireless temperature detection, it does not require a battery to supply power to the temperature measurement sensor, thus ensuring the service life of the battery. MDFC has strong anti-interference ability, low signal processing delay and low energy consumption, effectively ensuring signal quality and the efficiency of the temperature detection process; at the same time, MDFC is easy to deploy and can be flexibly deployed at each detection point of the battery, facilitating accurate temperature detection inside a three-dimensional stacked battery bin; in addition, through signal conversion by MDFC, the feedback signal and the driving signal have different frequencies, effectively reducing the co-frequency interference problem, ensuring signal transmission quality, and thus improving the accuracy of the temperature detection result.

[0126] The above embodiments have described a temperature detection method provided by this application. Next, a temperature detection system for implementing this temperature detection method will be further described.

[0127] Figure 3 It is a schematic structural diagram of a temperature detection system provided for an exemplary embodiment.

[0128] As Figure 3 shown, the temperature detection system provided by the embodiment of this application includes: MDFC, and MDFC includes: a temperature measurement sensor 310 and an MDFC circuit 320. The temperature measurement sensor 310 and the MDFC circuit 320 are electrically connected.

[0129] The temperature measurement sensor 310 is used to detect temperature information.

[0130] Among them, the temperature information refers to the temperature information corresponding to the detection point of the battery.

[0131] The detection point refers to the position for monitoring the battery temperature.

[0132] Optionally, the detection point is located on the outer surface of the battery, such as the surface of the battery cell, the surface of the electrode; or, the detection point is located inside the battery. The embodiment of this application does not limit this.

[0133] Exemplarily, the inside of the battery refers to the internal gap between large batteries or battery packs, such as: the internal gap of the lithium-ion battery of an electric vehicle.

[0134] In some embodiments, the temperature sensor 310 is a capacitive passive sensor.

[0135] Among them, a passive sensor refers to a sensor that can work without external power supply.

[0136] Exemplarily, a passive sensor generates corresponding signals by sensing changes in temperature, humidity, etc. in the environment. For example: a thermocouple sensor generates a voltage signal using the temperature difference, a photoelectric sensor generates a current signal using light irradiation of a semiconductor material, and a capacitive humidity sensor generates a capacitance value change signal using humidity changes.

[0137] The MDFC circuit 320 is used to receive a drive signal.

[0138] Among them, the drive signal is used to trigger the MDFC circuit to perform signal feedback.

[0139] In some embodiments, the drive signal sent from the transmit (TX) end on the network side (or gateway side) to the receive (RX) end on the terminal side is received through the antenna 330.

[0140] Among them, the network side refers to the server side or the network infrastructure part in network communication, including network devices, servers, services provided by network operators, etc. In the embodiments of the present application, it is used to send the drive signal and receive the feedback signal, and obtain the detected temperature value of the battery based on the feedback signal.

[0141] The terminal side refers to the client or user device in network communication. In the embodiments of the present application, it refers to the device for detecting the battery temperature.

[0142] In some embodiments, the MDFC circuit 320 is used to directly feedback a pre-generated feedback signal carrying temperature information after receiving the drive signal; or, the MDFC circuit 320 is used to generate a feedback signal carrying temperature information based on the drive signal after receiving the drive signal.

[0143] In some embodiments, the MDFC circuit 320 is further used to extract the drive signal through the resonant network 323 after receiving the drive signal, and then convert the extracted signal into a DC signal through the auxiliary energy transmission path 324 to supply power to the frequency generation circuit and generate a frequency signal corresponding to the temperature information.

[0144] Among them, the auxiliary energy transmission path 324 includes a rectifier circuit, a voltage stabilizing circuit, etc. for direct signal conversion.

[0145] Exemplarily, the frequency generation circuit includes a crystal oscillator / piezoelectric resonator 321.

[0146] The MDFC circuit 320 is also used to generate a feedback signal carrying temperature information based on the drive signal.

[0147] Among them, the feedback signal is used to carry temperature information, and the feedback signal and the drive signal are of different frequencies, reducing the co-frequency interference between signals.

[0148] In some embodiments, the MDFC circuit includes a frequency generation circuit and a mixer 322, and the frequency generation circuit and the mixer 322 are electrically connected.

[0149] Among them, the frequency generation circuit is used to output a frequency signal corresponding to the temperature information based on the temperature information.

[0150] The mixer 322 is used to mix and modulate the frequency signal and the drive signal to obtain a feedback signal.

[0151] Exemplarily, the mixer 322 is usually implemented by a Field Effect Transistor (FET) or a Bipolar Junction Transistor (BJT).

[0152] As Figure 3 shown, the gate (G pole) of the mixer 322 is connected to the frequency signal output by the frequency generation circuit, the source (S pole) is connected to the resonant network 323, and the drain (D pole) is connected to the matching network 300, and outputs the signal after mixing and modulation to the matching network 300.

[0153] In some embodiments, the sum frequency signal or the difference frequency signal after mixing and modulation is selected through the matching network 300.

[0154] Among them, the matching network 300 is composed of an inductor and a capacitor. The inductor has a lower impedance to low-frequency signals and a higher impedance to high-frequency signals; the capacitor has a lower impedance to high-frequency signals and a higher impedance to low-frequency signals.

[0155] Exemplarily, the inductor and the capacitor in the matching network 300 form a low-pass filter, select the difference frequency signal after mixing and modulation, and send the difference frequency signal from the TX on the terminal side to the receiving RX end on the network side through the antenna 330.

[0156] In summary, the present application provides a temperature detection system. The temperature information is detected by a passive temperature sensor, and then signal conversion is performed through an MDFC circuit. A feedback signal carrying the temperature information is generated based on the drive signal. While realizing wireless temperature detection, there is no need to supply power to the temperature sensor through a battery, thus ensuring the service life of the battery. The MDFC circuit has strong anti-interference ability, low signal processing delay and low energy consumption, effectively ensuring the signal quality and the efficiency of the temperature detection process. At the same time, it is convenient to deploy and is suitable for accurately detecting the temperature inside a three-dimensional stacked battery bin. In addition, through signal conversion by the MDFC circuit, the feedback signal and the drive signal are of different frequencies, effectively reducing the co-frequency interference problem, ensuring the signal transmission quality, and further improving the accuracy of the temperature detection result.

[0157] As Figure 4 shown is a schematic structural diagram of another temperature detection system provided by an exemplary embodiment.

[0158] Figure 4 In the energy storage battery bin 410 shown in [FIGURE], it includes a plurality of battery cells 411. The detection points are located on the upper surfaces of each battery cell 411. A temperature sensor 401, an MDFC circuit 402 and an antenna 403 are provided at each detection point, and the temperature sensor 401, the MDFC circuit 402 and the antenna 403 are electrically connected. The base station 400 is communicatively connected to the base station antenna 404. The base station 400 sends a drive signal to the antenna 403 through the base station antenna 404. The temperature sensor 310 detects the temperature information. The MDFC circuit 402 generates a feedback signal carrying the temperature signal based on the drive signal, and sends the feedback signal to the base station antenna 404 through the antenna 403. Then, the base station antenna 404 sends the feedback signal to the base station 400, and the base station 400 analyzes or forwards the feedback signal to obtain the temperature information / temperature value of each battery cell.

[0159] Exemplarily, the frequency of the drive signal is a fixed frequency in the range of 400 MHz - 1000 MHz. The frequencies of the drive signals sent by the base station antenna 404 to different antennas 403 are different. There is a protection frequency band with a certain frequency range between the drive signals. The frequency of the drive signal is different from that of its corresponding feedback signal, with a frequency difference of at least 10 MHz. The frequencies of different feedback signals are also different, preventing co-frequency interference.

[0160] Exemplarily, the energy storage battery bin 410 has a metal shell, which will isolate wireless signals. Therefore, holes are drilled on the surface of the energy storage battery bin 410, and the base station antenna 404 is deployed on the surface of the energy storage battery bin 410 and led into the energy storage battery bin 410 through the holes to realize communication with the antenna 403. The number and deployment positions of the base station antenna 404, the temperature sensor 401, the MDFC circuit 402 and the antenna 403 are not limited to Figure 4 shown in [FIGURE].

[0161] The above mainly introduces the solution provided by this application. Correspondingly, this application also provides a temperature detection device, which is used to implement the above method embodiments.

[0162] As Figure 5 shown in the structural schematic diagram of the temperature detection device, the temperature detection device may include a receiving module 501 and a processing module 502. Among them, the receiving module 501 is used to execute Figure 2 the operation of step S201 in the method shown in the schematic diagram; the processing module 502 is used to execute Figure 2 the operation of step S202 in

[0163] In some embodiments, in order to implement the above functions, the temperature detection device includes the corresponding hardware structure and / or software module for executing each function. Those skilled in the art should easily realize that, combining the units and algorithm steps of each example described in the embodiments disclosed in this article, this application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed in the way of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional technicians can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of this application.

[0164] The embodiments of this application can divide the function modules of the temperature detection device according to the above method embodiments. For example, each function module can be divided corresponding to each function, or two or more functions can be integrated into one processing module. The above integrated modules can be implemented in the form of hardware or in the form of software function modules. It should be noted that the division of modules in the embodiments of this application is illustrative, only a logical function division, and there may be other division methods in actual implementation.

[0165] As Figure 6 shown, the computer device provided by the embodiments of this application may include a processor 601, a bus 602, a communication interface 603, and a memory 604. The processor 601, the memory 604, and the communication interface 603 communicate with each other through the bus 602. It should be understood that this application does not limit the number of processors and memories in the network device.

[0166] The bus 602 may be a PCI bus or an extended industry standard architecture (EISA) bus, or a UB bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the convenience of representation, Figure 6It is represented by only one line in the figure, but it does not mean that there is only one bus or one type of bus. The bus 602 may include a path for transmitting information between various components of the network device (for example, the memory 604, the processor 601, and the communication interface 603).

[0167] The processor 601 may include any one or more of processors such as a CPU, a graphics processing unit (GPU), a microprocessor (MP), or a digital signal processor (DSP).

[0168] The memory 604 may include a volatile memory, such as a random access memory (RAM). The processor 601 may also include a non-volatile memory, such as a read-only memory (ROM), a flash memory, a hard disk drive (HDD), or a solid state drive (SSD).

[0169] The communication interface 603 uses a transceiver module such as, but not limited to, a network interface card or a transceiver to implement communication between the network device and other devices or communication networks.

[0170] The memory 604 stores executable program codes, and the processor 601 executes the executable program codes to respectively implement the functions of the foregoing method embodiments. That is, the memory 604 stores instructions for executing the above temperature detection method.

[0171] On the other hand, a computer-readable storage medium is provided. At least one computer program is stored in the computer-readable storage medium, and the at least one computer program is loaded and executed by a processor to implement the temperature detection method provided in the foregoing method embodiments.

[0172] On the other hand, a computer program product is provided. The computer program product includes a computer program or instructions. When the computer program or instructions are executed by a processor, the temperature detection method provided in the foregoing method embodiments is implemented.

[0173] From the description of the above embodiments, those skilled in the art can clearly understand that for the convenience and brevity of description, only the division of the above functional modules is used as an example. In actual applications, the above functions can be allocated to different functional modules as needed, that is, the internal structure of the module is divided into different functional modules to complete all or part of the functions described above. For the specific working processes of the system, module, and unit described above, reference can be made to the corresponding processes in the foregoing method embodiments, which will not be elaborated herein.

[0174] Since the temperature detection module, computer-readable storage medium, and computer program product in the embodiments of the present invention can be applied to the above method, the technical effects that can be obtained therefrom can also refer to the above method embodiments, which will not be elaborated herein.

[0175] The method steps in this embodiment can be implemented in a hardware manner or by a processor executing software instructions. The software instructions can be composed of corresponding software modules, and the software modules can be stored in a random access memory (RAM), flash memory, read-only memory (ROM), programmable ROM (PROM), erasable PROM (EPROM), electrically erasable PROM (EEPROM), register, hard disk, removable hard disk, CD-ROM, or any other form of storage medium well-known in the art. An exemplary storage medium is coupled to the processor so that the processor can read information from the storage medium and write information to the storage medium. Of course, the storage medium can also be a component of the processor. The processor and the storage medium can be located in an ASIC. Additionally, the ASIC can be located in a network device. Of course, the processor and the storage medium can also exist as discrete components in the network device.

[0176] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented using software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer programs or instructions. When the computer program or instructions are loaded and executed on a computer, the processes or functions of the embodiments of the present application are executed in whole or in part. The computer can be a general-purpose computer, a special-purpose computer, a computer network, a network device, a user device, or other programmable modules. The computer program or instructions can be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer program or instructions can be transmitted from one website, computer, server, or data center to another website, computer, server, or data center in a wired or wireless manner. The computer-readable storage medium can be any available medium that the computer can access, or a data storage device such as a server or data center that integrates one or more available media. The available medium can be a magnetic medium, such as a floppy disk, a hard disk, or a magnetic tape; it can also be an optical medium, such as a digital video disc (DVD); it can also be a semiconductor medium, such as a solid state drive (SSD). As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed in the present application can easily think of various equivalent modifications or substitutions, and these modifications or substitutions should all be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A temperature detection method, characterized in that: The method is applied to a microwave direct-drive frequency converter MDFC, and the method comprises: receiving a driving signal, wherein the driving signal is used to trigger the MDFC to perform signal feedback; Based on the driving signal, a feedback signal carrying temperature information is generated, and the feedback signal and the driving signal have different frequencies.

2. The method according to claim 1, characterized in that The step of generating a return signal carrying temperature information based on the driving signal includes: Get the temperature information corresponding to the detection point; Based on the temperature information, generating a frequency signal corresponding to the temperature information; The frequency signal is modulated onto the driving signal to obtain the feedback signal.

3. The method according to claim 2, characterized in that The step of generating a frequency signal corresponding to the temperature information based on the temperature information includes: Generate a measured capacitance value corresponding to the temperature information according to the correlation between the temperature information and the capacitance value, wherein the measured capacitance value refers to the capacitance value corresponding to the temperature information; The frequency signal is output according to the measured capacitance value.

4. The method according to claim 3, characterized in that The temperature information and the capacitance value are negatively correlated or positively correlated.

5. The method according to claim 2, characterized in that: The step of modulating the frequency signal onto the driving signal to obtain the return signal includes: The frequency signal and the driving signal are mixed and modulated to obtain the return signal.

6. The method according to claim 5, characterized in that Mixing and modulating the frequency signal and the driving signal to obtain the return signal includes: Mixing the frequency signal and the driving signal to obtain a sum frequency signal and a difference frequency signal; the sum frequency signal refers to a signal obtained by adding the frequencies of the driving signal and the frequency signal, and the difference frequency signal refers to a signal obtained by subtracting the frequencies of the driving signal and the frequency signal; The sum frequency signal or the difference frequency signal is selected as the return signal.

7. The method according to any one of claims 2 to 6, characterized in that: The temperature information corresponding to the detection point is obtained through a capacitive passive sensor.

8. A temperature detection system, characterized in that: The system comprises: a microwave direct-drive frequency converter MDFC, the MDFC comprises: a temperature sensor and an MDFC circuit, the temperature sensor and the MDFC circuit are electrically connected; The temperature sensor is used to detect temperature information; The MDFC circuit is used to receive a driving signal, and the driving signal is used to trigger the MDFC circuit to perform signal feedback; The MDFC circuit is further used to generate a feedback signal carrying temperature information based on the driving signal, and the feedback signal and the driving signal have different frequencies.

9. The system according to claim 8, characterized in that The MDFC circuit is further configured to generate a frequency signal corresponding to the temperature information based on the temperature information; and modulate the frequency signal onto the driving signal to obtain the feedback signal.

10. The system according to claim 9, characterized in that The temperature measuring sensor is further used to generate a measured capacitance value corresponding to the temperature information according to the correlation between the temperature information and the capacitance value, wherein the measured capacitance value refers to the capacitance value corresponding to the temperature information; The MDFC circuit is further configured to output the frequency signal according to the measured capacitance value.

11. The system according to claim 10, characterized in that The temperature information and the capacitance value are negatively correlated or positively correlated.

12. The system according to claim 9, characterized in that The MDFC circuit is further used to perform mixing modulation on the frequency signal and the driving signal to obtain the return signal.

13. The system according to claim 11, characterized in that The MDFC circuit is further used to perform mixing modulation on the frequency signal and the driving signal, and output a sum frequency signal and a difference frequency signal; the sum frequency signal refers to a signal obtained by adding the frequencies of the driving signal and the frequency signal, and the difference frequency signal refers to a signal obtained by subtracting the frequencies of the driving signal and the frequency signal; The MDFC circuit is further used to select the sum frequency signal or the difference frequency signal as the return signal.

14. The system according to any one of claims 8 to 13, characterized in that The temperature measuring sensor is a capacitive passive sensor.

15. A temperature detection device, characterized in that: The device includes: A receiving module, used for receiving a driving signal, wherein the driving signal is used for triggering the MDFC to perform signal feedback; The processing module is used to generate a feedback signal carrying temperature information based on the driving signal, wherein the feedback signal and the driving signal have different frequencies.

16. A computer device, characterized in that: The computer device comprises: a processor and a memory, wherein at least one computer program is stored in the memory, and the at least one computer program is loaded and executed by the processor to implement the temperature detection method according to any one of claims 1 to 7.

17. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores at least one computer program, and the at least one computer program is loaded and executed by the processor to implement the temperature detection method according to any one of claims 1 to 7.

18. A computer program product, characterized in that The computer program product comprises a computer program or instructions, and when the computer program or instructions are executed by a processor, the temperature detection method according to any one of claims 1 to 7 is implemented.

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