A capacity calculation method and circuit of a low-power cat1 gateway lithium sulfoxyl chloride battery

Abstract

The application relates to a capacity calculation method and circuit applied to a low-power Cat1 gateway lithium sulfochloride battery, which comprises the following steps: collecting a sampling resistor voltage signal on a lithium sulfochloride battery power supply circuit at a set frequency and carrying out amplification processing, and recording the amplified voltage signal; charging a reference capacitor in an integration circuit using the amplified voltage signal and recording voltage variation of the reference capacitor to obtain a voltage variation curve segment; calculating power consumption in the collection period based on the voltage variation curve segment, recording the single-time power consumption; and carrying out difference calculation to obtain the residual power of the low-power Cat1 gateway lithium sulfochloride battery. The capacity calculation method and circuit applied to the low-power Cat1 gateway lithium sulfochloride battery disclosed by the application can convert aperiodic high-pulse radio frequency current into a smooth slope voltage, carry out impedance conversion and fast collection, and detect the power to obtain the accurate power of the lithium sulfochloride battery.

Description

Technical Field

[0001] This application relates to the field of data processing technology, and in particular to a method and circuit for capacity calculation of lithium thionyl chloride batteries for low-power Cat1 gateways. Background Technology

[0002] Lithium thionyl chloride batteries are widely used in the low-power instrument industry due to their high capacity and long lifespan. These batteries have a stable open-circuit voltage, remaining above 3.6V until the battery capacity is depleted; there is no direct correlation between the remaining capacity and the open-circuit voltage.

[0003] The load voltage of lithium thionyl chloride batteries is also very stable, and the correlation between load voltage and battery remaining capacity is not obvious. However, the hysteresis characteristics of lithium thionyl chloride batteries will interfere with the correlation between load voltage and capacity. Therefore, the remaining capacity of the battery cannot be determined by detecting open circuit voltage or load voltage.

[0004] The current common approach is to measure the current consumed by the load to statistically analyze power usage. A known solution involves using a sampling resistor to periodically monitor the voltage across its terminals to calculate the current. However, for Cat1 gateways, due to varying base station signal strengths and the fact that radio frequency current consists of numerous short-duration, unpredictable pulses, the method of periodically acquiring current using a microcontroller is ineffective. Summary of the Invention

[0005] This application provides a method and circuit for capacity measurement of lithium thionyl chloride batteries applied to low-power Cat1 gateways. The method detects the battery capacity by converting non-periodic high-pulse radio frequency current into a smooth ramp voltage and combining it with impedance conversion for rapid acquisition, thereby obtaining the accurate battery capacity of the lithium thionyl chloride battery.

[0006] The above-mentioned objective of this application is achieved through the following technical solution:

[0007] In a first aspect, this application provides a capacity calculation method for lithium thionyl chloride batteries used in low-power Cat1 gateways, including:

[0008] In response to a received or detected trigger signal, the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a set frequency. The acquisition period of the sampling resistor voltage signal is one complete working cycle.

[0009] The sampled resistor voltage signal located in the same acquisition cycle is amplified and denoted as the amplified voltage signal;

[0010] The reference capacitor in the integrator circuit is charged using an amplified voltage signal, and the voltage change of the reference capacitor is recorded to obtain the voltage change curve segment.

[0011] The power consumption of the acquisition cycle is calculated based on the voltage change curve segment and recorded as the power consumption per acquisition.

[0012] The remaining power of the low-power Cat1 gateway lithium thionyl chloride battery is calculated by calculating the difference between the current power level and the power consumption of a single charge.

[0013] In one possible implementation of the first aspect, after obtaining the amplified voltage signal, the amplified voltage signal is further calibrated, with the calibration reference being the number of peak points lost.

[0014] In one possible implementation of the first aspect, calibrating the amplified voltage signal includes:

[0015] The amplified voltage signal is segmented in the time series, and the amplified voltage signal in the same segment has the same trend of change in the time series.

[0016] Select two adjacent segments in the time series and generate peak points corresponding to the two reference time periods;

[0017] Calculate the reference voltage change curve segment corresponding to the amplified voltage signal;

[0018] Calculate the difference value between the reference voltage change curve segment and the voltage change curve segment;

[0019] The sampling frequency of the sampling resistor voltage signal is adjusted according to the discrimination value, and the discrimination value is positively correlated with the sampling frequency.

[0020] In one possible implementation of the first aspect, the distinguishability value is the peak point that exists only on the reference voltage change curve segment.

[0021] In one possible implementation of the first aspect, when adjusting the sampling frequency of the sampling resistor voltage signal, the method further includes adjusting the sampling frequency of the sampling resistor voltage signal according to the changing trend of the amplified voltage signal, wherein the changing trend of the amplified voltage signal is positively correlated with the sampling frequency of the sampling resistor voltage signal.

[0022] The changing trends of the amplified voltage signal include positive and negative trends.

[0023] In one possible implementation of the first aspect, obtaining the voltage change curve segment includes:

[0024] The current voltage value is obtained by acquiring the voltage value of the reference capacitor based on the periodic interrupt signal;

[0025] Select the voltage value of a reference capacitor preceding the current voltage value and the voltage value of a reference capacitor following the current voltage value in the sequential sequence, and calculate the intermediate value between the two voltage values;

[0026] The intermediate value is used as the sampled voltage value corresponding to the periodic interrupt signal;

[0027] The collected voltage values ​​are used in the process of obtaining subsequent intermediate values.

[0028] In one possible implementation of the first aspect, when acquiring the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit at a set frequency, the method also includes identifying voltage drop signals.

[0029] When identifying voltage drop signals, a high-frequency sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is used to acquire the signal.

[0030] When the resistor voltage signal obtained by high-frequency acquisition has a steep falling edge, the steep falling edge is tracked until it disappears, and then the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a set frequency.

[0031] Secondly, this application provides a capacity calculation circuit for a low-power Cat1 gateway lithium thionyl chloride battery, the capacity calculation circuit comprising:

[0032] One or more memories for storing instructions; and

[0033] One or more processors are configured to call and execute the instructions from the memory to perform the methods described in the first aspect and any possible implementation thereof.

[0034] Thirdly, this application provides a computer program product, including program instructions that, when run by a computing device, execute the method described in the first aspect and any possible implementation thereof.

[0035] Fourthly, this application provides a chip system including a processor for implementing the functions involved in the above aspects, such as generating, receiving, transmitting, or processing data and / or information involved in the above methods.

[0036] This chip system can consist of chips or include chips and other discrete components.

[0037] In one possible design, the chip system also includes a memory for storing necessary program instructions and data. The processor and the memory can be decoupled and located on different devices, connected via wired or wireless means, or the processor and the memory can be coupled to the same device. Attached Figure Description

[0038] Figure 1This is a flowchart illustrating the steps of a capacity calculation method for a low-power Cat1 gateway lithium thionyl chloride battery provided in this application.

[0039] Figure 2 This is a schematic diagram of the circuit involved in the capacity measurement method provided in this application.

[0040] Figure 3 This is a schematic diagram illustrating the principle of calculating remaining battery power, as provided in this application.

[0041] Figure 4 This is a schematic diagram illustrating the change process of a sampling resistor voltage signal provided in this application.

[0042] Figure 5 This is a schematic diagram of the change process of a rising voltage signal provided in this application.

[0043] Figure 6 This is a schematic diagram of a low-frequency acquisition of sampling resistor voltage signal provided in this application.

[0044] Figure 7 This is a schematic diagram of a high-frequency acquisition of sampling resistor voltage signal provided in this application.

[0045] Figure 8 This is a schematic diagram of a resistor voltage signal with a steep falling edge provided in this application. Detailed Implementation

[0046] To better understand the technical solutions in this application, the relevant content will be introduced first.

[0047] Lithium thionyl chloride batteries are a very common type of primary battery (non-rechargeable). Their main advantages are high energy density, long lifespan, and wide operating range. They can also provide a stable operating voltage. A significant drawback of the stable operating voltage is that the remaining charge of the thionyl chloride battery cannot be determined by voltage detection. This is because the supply voltage of the thionyl chloride battery hardly changes during normal use, except in the final stages.

[0048] The Cat1 gateway can be described as a 4G communication module that achieves an optimal balance between performance, power consumption, and cost. It is currently the core solution for upgrading a massive number of medium-speed IoT devices to 4G networks, meeting the network performance requirements of the vast majority of IoT applications.

[0049] The radio frequency pulse current is a typical power consumption characteristic of the Cat1 gateway when transmitting data to the base station. At this time, the radio frequency pulse current has the characteristics of being instantaneous and irregular, that is, the radio frequency pulse current will change according to the specific operating conditions of the Cat1 gateway.

[0050] The technical solutions in this application will be further described in detail below with reference to the accompanying drawings.

[0051] This application discloses a capacity calculation method for lithium thionyl chloride batteries used in low-power Cat1 gateways. Please refer to [link / reference]. Figure 1 In some examples, the capacity calculation method for low-power Cat1 gateway lithium thionyl chloride batteries disclosed in this application includes the following steps:

[0052] S101, in response to a received or detected trigger signal, acquires the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit at a set frequency, and the acquisition period of the sampling resistor voltage signal is one complete working cycle.

[0053] S102, amplify the sampling resistor voltage signal located in the same acquisition cycle, and denot it as the amplified voltage signal;

[0054] S103: The reference capacitor in the integrator circuit is charged using an amplified voltage signal, and the voltage change of the reference capacitor is recorded to obtain the voltage change curve segment.

[0055] S104, The power consumption of the acquisition cycle is calculated based on the voltage change curve segment and recorded as the power consumption per acquisition;

[0056] S105, calculate the difference between the current power level and the single power consumption of the low-power Cat1 gateway lithium thionyl chloride battery to obtain the remaining power level of the low-power Cat1 gateway lithium thionyl chloride battery.

[0057] First, the circuitry involved in the capacity calculation method for low-power Cat1 gateway lithium thionyl chloride batteries disclosed in this application will be described. Please refer to [link to relevant documentation]. Figure 2 The circuit includes a sampling resistor, a voltage sampling circuit, an amplification and integration circuit, an impedance conversion circuit, and an MCU. The sampling resistor is located on the power supply circuit of the lithium thionyl chloride battery. The voltage sampling circuit is electrically connected to the sampling resistor. The voltage sampling circuit, the amplification and integration circuit, the impedance conversion circuit (high input impedance, low output impedance), and the MCU are electrically connected in sequence.

[0058] In other words, the implementing entity of the technical solution in this application is the circuit mentioned above.

[0059] In step S101, in response to the received or detected trigger signal, the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is first acquired at a set frequency. The set frequency at this time is generally a fixed frequency.

[0060] Additionally, the sampling resistor voltage signal acquisition period is required to be one complete working cycle. Here, a complete working cycle refers to the time corresponding to the low-power Cat1 gateway completing one complete data transmission process. In this application, the power consumption statistics method for the lithium thionyl chloride battery is to calculate and accumulate the power consumption of the low-power Cat1 gateway each time, and then compare it with the total power of the lithium thionyl chloride battery to obtain the remaining power of the lithium thionyl chloride battery. Alternatively, it can be described as calculating the power consumption of the low-power Cat1 gateway each time and subtracting it from the total power of the lithium thionyl chloride battery.

[0061] In step S102, the sampling resistor voltage signal located in the same acquisition cycle is amplified and recorded as the amplified voltage signal. This is because the resistance value of the sampling resistor must be very small (e.g., 0.01Ω, to reduce voltage drop and heat generation), so the generated voltage signal V_sense is also very weak (e.g., a 2A current only generates 0.02V voltage).

[0062] The amplification stage amplifies this signal proportionally (e.g., by 50 times, to 1V), making its amplitude more suitable for subsequent circuit processing, while also improving the signal-to-noise ratio and measurement accuracy.

[0063] In step S103, the reference capacitor in the integrator circuit is charged using an amplified voltage signal and the voltage change of the reference capacitor is recorded to obtain the voltage change curve segment. This is described in conjunction with the integrator circuit, which is usually composed of an operational amplifier, a capacitor and a resistor.

[0064] The mathematical function of an integrator circuit is to integrate the input voltage over time, which is achieved through a capacitor: the current flowing into the integrator circuit charges the capacitor, and the voltage across the capacitor increases linearly as the charge accumulates.

[0065] In this way, a series of unpredictable, brief high pulses can be converted into a smooth, slowly varying ramp voltage, the total rise of which is proportional to the total charge carried by all the pulses.

[0066] In step S104, the power consumption of the acquisition cycle is calculated based on the voltage change curve segment and recorded as the single-cycle power consumption. Simultaneously, in step S105, the difference between the current power level of the low-power Cat1 gateway lithium thionyl chloride battery and the single-cycle power consumption is calculated to obtain the remaining power of the low-power Cat1 gateway lithium thionyl chloride battery. Figure 3 As shown.

[0067] The advantages of this approach are as follows:

[0068] The MCU no longer needs to measure a pulse that is difficult to capture, but a slowly changing DC voltage. The MCU can easily sample this voltage at any speed (even "fast") and obtain a stable and valid value each time it samples.

[0069] The MCU can convert analog voltage into digital value through a series of binary search comparisons, and can process a slowly changing ramp signal more accurately. In addition, the MCU can sample this ramp voltage at millisecond intervals, and can accurately track its rising trend by sampling multiple times.

[0070] It should be noted that the transient and irregular nature of the radio frequency pulse current mentioned above means it is difficult to detect; however, in this application, please refer to [link to relevant documentation]. Figure 4 and Figure 5 This can be converted into a relatively smooth rising voltage signal. By sampling and calculating this rising voltage signal, the power consumption of the low-power Cat1 gateway in a single operation can be obtained more accurately, and the remaining power of the lithium thionyl chloride battery can be determined more accurately. Here, the lithium thionyl chloride battery refers to the battery that powers the low-power Cat1 gateway.

[0071] In some cases, after obtaining the amplified voltage signal, it is necessary to calibrate it. The calibration reference is the number of peak points lost. The calibration of the amplified voltage signal is related to the sampling frequency, as detailed below:

[0072] Please see Figure 6 and Figure 7 First, assuming that the sampling resistor voltage signal acquisition frequency is a fixed value, if high frequency acquisition is always performed, a large amount of useless data will be generated, and high power consumption will also be introduced. However, if low frequency acquisition is used, a certain amount of data loss will occur. Therefore, it is necessary to adjust the sampling frequency of the sampling resistor voltage signal by calibrating the amplified voltage signal.

[0073] The specific method for calibrating the amplified voltage signal is as follows:

[0074] The amplified voltage signal is segmented in the time series, and the amplified voltage signal in the same segment has the same trend of change in the time series.

[0075] Select two adjacent segments in the time series and generate peak points corresponding to the two reference time periods;

[0076] Calculate the reference voltage change curve segment corresponding to the amplified voltage signal;

[0077] Calculate the difference value between the reference voltage change curve segment and the voltage change curve segment;

[0078] The sampling frequency of the sampling resistor voltage signal is adjusted according to the discrimination value, and the discrimination value is positively correlated with the sampling frequency.

[0079] Specifically, the method involves determining whether the sampling frequency of the voltage signal from the sampling resistor needs to be adjusted by calculating the difference between the reference voltage change curve segment and the voltage change curve segment. Here, the difference value refers to the peak point that exists only on the reference voltage change curve segment.

[0080] The method of regenerating the peak points corresponding to the two reference time periods is used to determine whether peak points have been lost. If peak points are lost, it means that the sampling frequency is not appropriate and needs to be adjusted; otherwise, no adjustment is needed.

[0081] The selection of the discrimination value is generally determined based on the set error. For example, in a calculation process, if the power corresponding to a lost peak point is 30 mA, and the required measurement error is ≤100 mA, then the discrimination value should be 3. In this case, the measurement error corresponds to a fixed time length, usually in milliseconds.

[0082] Alternatively, this problem can be solved by setting fixed parameters.

[0083] In some possible implementations, adjusting the sampling frequency of the sampling resistor voltage signal also includes adjusting the sampling frequency of the sampling resistor voltage signal according to the changing trend of the amplified voltage signal, where the changing trend of the amplified voltage signal is positively correlated with the sampling frequency of the sampling resistor voltage signal.

[0084] The changing trends of the amplified voltage signal include positive and negative trends.

[0085] In other words, when the amplified voltage signal changes significantly (slope), the sampling frequency of the sampling resistor voltage signal needs to be automatically increased to avoid missing peak points.

[0086] In some examples, the specific methods for obtaining the voltage change curve segment are as follows:

[0087] The current voltage value is obtained by acquiring the voltage value of the reference capacitor based on the periodic interrupt signal;

[0088] Select the voltage value of a reference capacitor preceding the current voltage value and the voltage value of a reference capacitor following the current voltage value in the sequential sequence, and calculate the intermediate value between the two voltage values;

[0089] The intermediate value is used as the sampled voltage value corresponding to the periodic interrupt signal;

[0090] The collected voltage values ​​are used in the process of obtaining subsequent intermediate values.

[0091] This method uses intermediate values ​​to replace the acquired values. Its advantage is that it can effectively suppress occasional, severe impulse noise without losing key transient information of the signal. This is because in an electrical environment, various occasional, high-intensity noises can cause a momentary, large spike in the ADC sampling value.

[0092] If the average of these contaminated data is directly calculated, the outlier will severely distort the final result, causing the sampled values ​​to be completely distorted. The processing method described in this application can effectively filter out this impulse interference, ensuring the validity of the data.

[0093] In addition, the passivation effect of lithium thionyl chloride batteries should also be considered here. Passivation refers to the chemical reaction between lithium metal and thionyl chloride electrolyte on the surface of the positive electrode (carbon electrode) of lithium thionyl chloride batteries, forming a dense, non-conductive lithium chloride (LiCl) film.

[0094] This non-conductive lithium chloride (LiCl) film provides ultra-low self-discharge and ultra-long lifespan, but it suffers from voltage drop, requiring current breakdown during use. To address this issue, periodic wake-up is typically used, but there is still a certain probability that the lithium chloride (LiCl) film will reappear.

[0095] Therefore, when acquiring the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit according to the set frequency, it also includes identifying voltage drop signals. When identifying voltage drop signals, the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a high frequency.

[0096] The resistor voltage signal obtained by high-frequency acquisition has a steep falling edge. Figure 8 As shown, when the steep falling edge disappears, the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is collected at a set frequency.

[0097] The above method determines when to sample the voltage signal of the sampling resistor located in the lithium thionyl chloride battery power supply circuit at a set frequency by dynamically acquiring the sampling frequency. This is because maintaining a high sampling frequency at all times would result in additional power consumption.

[0098] Here, for the power consumption of a steep falling edge, a fixed power value is generally set (obtained through experiments, referring to the breakdown energy consumption of lithium chloride (LiCl) film under different operating conditions) to participate in the calculation of the remaining power. At the same time, identifying the steep falling edge can also avoid the battery being depleted due to misjudgment.

[0099] This application also provides a capacity measurement device for low-power Cat1 gateway lithium thionyl chloride batteries, comprising:

[0100] The data acquisition unit is used to acquire the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit in response to the received or detected trigger signal, according to a set frequency. The acquisition period of the sampling resistor voltage signal is one complete working cycle.

[0101] The first processing unit is used to amplify the sampling resistor voltage signal located in the same acquisition cycle, which is denoted as the amplified voltage signal.

[0102] The second processing unit is used to charge the reference capacitor in the integrator circuit using an amplified voltage signal and record the voltage change of the reference capacitor to obtain a voltage change curve segment.

[0103] The first calculation unit is used to calculate the power consumption of the acquisition cycle based on the voltage change curve segment, and is recorded as the power consumption per acquisition.

[0104] The second calculation unit is used to calculate the difference between the current power level and the power consumption of the low-power Cat1 gateway lithium thionyl chloride battery to obtain the remaining power level of the low-power Cat1 gateway lithium thionyl chloride battery.

[0105] Furthermore, after obtaining the amplified voltage signal, the process also includes calibrating the amplified voltage signal, with the calibration reference being the number of peak points lost.

[0106] Furthermore, calibrating the amplified voltage signal includes:

[0107] The amplified voltage signal is segmented in the time series, and the amplified voltage signal in the same segment has the same trend of change in the time series.

[0108] Select two adjacent segments in the time series and generate peak points corresponding to the two reference time periods;

[0109] Calculate the reference voltage change curve segment corresponding to the amplified voltage signal;

[0110] Calculate the difference value between the reference voltage change curve segment and the voltage change curve segment;

[0111] The sampling frequency of the sampling resistor voltage signal is adjusted according to the discrimination value, and the discrimination value is positively correlated with the sampling frequency.

[0112] Furthermore, the distinguishability value is the peak point that exists only on the reference voltage change curve segment.

[0113] Furthermore, when adjusting the sampling frequency of the sampling resistor voltage signal, it also includes adjusting the sampling frequency of the sampling resistor voltage signal according to the changing trend of the amplified voltage signal, and the changing trend of the amplified voltage signal is positively correlated with the sampling frequency of the sampling resistor voltage signal.

[0114] The changing trends of the amplified voltage signal include positive and negative trends.

[0115] Furthermore, the voltage change curve segments obtained include:

[0116] The current voltage value is obtained by acquiring the voltage value of the reference capacitor based on the periodic interrupt signal;

[0117] Select the voltage value of a reference capacitor preceding the current voltage value and the voltage value of a reference capacitor following the current voltage value in the sequential sequence, and calculate the intermediate value between the two voltage values;

[0118] The intermediate value is used as the sampled voltage value corresponding to the periodic interrupt signal;

[0119] The collected voltage values ​​are used in the process of obtaining subsequent intermediate values.

[0120] Furthermore, when acquiring the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit at a set frequency, it also includes identifying voltage drop signals;

[0121] When identifying voltage drop signals, a high-frequency sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is used to acquire the signal.

[0122] When the resistor voltage signal obtained by high-frequency acquisition has a steep falling edge, the steep falling edge is tracked until it disappears, and then the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a set frequency.

[0123] In one example, the unit in any of the above devices may be one or more integrated circuits configured to implement the above methods, such as one or more application-specific integrated circuits (ASICs), or one or more digital signal processors (DSPs), or one or more field-programmable gate arrays (FPGAs), or a combination of at least two of these integrated circuit forms.

[0124] For example, when the units in the device can be implemented through a processing element scheduler, the processing element can be a general-purpose processor, such as a central processing unit (CPU) or other processor capable of calling programs. Alternatively, these units can be integrated together to form a system-on-a-chip (SOC).

[0125] In this application, various objects such as messages / information / devices / network elements / systems / apparatus / actions / operations / processes / concepts may be named. It is understood that these specific names do not constitute a limitation on the relevant objects. The names may be changed depending on the scenario, context, or usage habits. The understanding of the technical meaning of the technical terms in this application should be mainly determined from their functions and technical effects embodied / performed in the technical solution.

[0126] Those skilled in the art will understand that, for the sake of convenience and brevity, the specific working processes of the systems, devices, and units described above can be referred to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0127] In the several embodiments provided in this application, it should be understood that the disclosed systems, apparatuses, and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some interfaces; the indirect coupling or communication connection between apparatuses or units may be electrical, mechanical, or other forms.

[0128] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0129] Those skilled in the art will recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0130] It should also be understood that in the various embodiments of this application, the terms "first," "second," etc., are merely to indicate that multiple objects are different. For example, a first time window and a second time window are only to indicate different time windows. They should not have any effect on the time windows themselves, and the aforementioned terms "first," "second," etc., should not impose any limitations on the embodiments of this application.

[0131] It should also be understood that, in the various embodiments of this application, unless otherwise specified or in case of logical conflict, the terms and / or descriptions between different embodiments are consistent and can be referenced by each other, and the technical features in different embodiments can be combined to form new embodiments according to their inherent logical relationships.

[0132] If the aforementioned functions are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of this application, in essence, or the part that contributes to the prior art, or a portion of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a computer-readable storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of this application. The aforementioned computer-readable storage medium includes various media capable of storing program code, such as USB flash drives, portable hard drives, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0133] This application also provides a capacity calculation circuit for a low-power Cat1 gateway lithium thionyl chloride battery, the capacity calculation circuit comprising:

[0134] One or more memories for storing instructions; and

[0135] One or more processors are configured to retrieve and execute the instructions from the memory, performing the methods described above.

[0136] This application also provides a computer program product including instructions that, when executed, cause the terminal device and the network device to perform operations corresponding to the methods described above.

[0137] This application also provides a chip system including a processor for implementing the functions involved in the above description, such as generating, receiving, transmitting, or processing the data and / or information involved in the above methods.

[0138] This chip system can consist of chips or include chips and other discrete components.

[0139] The processor mentioned above can be a CPU, a microprocessor, an ASIC, or one or more integrated circuits that execute a program to control the method of transmitting the feedback information described above.

[0140] In one possible design, the chip system also includes a memory for storing necessary program instructions and data. The processor and the memory can be decoupled and located on different devices, connected via wired or wireless means to support the chip system in implementing the various functions described in the above embodiments. Alternatively, the processor and the memory can also be coupled to the same device.

[0141] Optionally, the computer instructions are stored in memory.

[0142] Optionally, the memory can be a storage unit within the chip, such as a register or cache. Alternatively, the memory can be a storage unit located outside the chip within the terminal, such as a ROM or other types of static storage devices that can store static information and instructions, such as RAM.

[0143] It is understood that the memory in this application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory.

[0144] Non-volatile memory can be ROM, programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory.

[0145] Volatile memory can be RAM, which is used as an external cache. There are many different types of RAM, such as static random access memory (SRAM), dynamic random access memory (DRAM), synchronous dynamic random access memory (SDRAM), double data rate synchronous dynamic random access memory (DDR SDRAM), enhanced synchronous dynamic random access memory (ESDRAM), synchronous link dynamic random access memory (SLDRAM), and direct memory bus random access memory.

[0146] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method for calculating the capacity of lithium thionyl chloride batteries used in low-power Cat1 gateways, characterized in that, include: In response to a received or detected trigger signal, the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a set frequency. The acquisition period of the sampling resistor voltage signal is one complete working cycle. The sampled resistor voltage signal located in the same acquisition cycle is amplified and denoted as the amplified voltage signal; The reference capacitor in the integrator circuit is charged using an amplified voltage signal, and the voltage change of the reference capacitor is recorded to obtain the voltage change curve segment. The power consumption of the acquisition cycle is calculated based on the voltage change curve segment and recorded as the power consumption per acquisition. The remaining power of the low-power Cat1 gateway lithium thionyl chloride battery is obtained by calculating the difference between the current power level and the power consumption of a single charge. After obtaining the amplified voltage signal, the process also includes calibrating the amplified voltage signal. The calibration reference is the number of peak points lost. The calibration of the amplified voltage signal includes: The amplified voltage signal is segmented in the time series, and the amplified voltage signal in the same segment has the same trend of change in the time series. Select two adjacent segments in the time series and generate peak points corresponding to the two reference time periods; Calculate the reference voltage change curve segment corresponding to the amplified voltage signal; Calculate the difference value between the reference voltage change curve segment and the voltage change curve segment; The sampling frequency of the sampling resistor voltage signal is adjusted according to the discrimination value, and the discrimination value is positively correlated with the sampling frequency.

2. The capacity calculation method for lithium thionyl chloride batteries applied to low-power Cat1 gateways according to claim 1, characterized in that, The distinguishability value is the peak point that exists only on the reference voltage change curve segment.

3. The capacity calculation method for lithium thionyl chloride batteries applied to low-power Cat1 gateways according to claim 2, characterized in that, When adjusting the sampling frequency of the sampling resistor voltage signal, it is also necessary to adjust the sampling frequency of the sampling resistor voltage signal according to the changing trend of the amplified voltage signal. The changing trend of the amplified voltage signal is positively correlated with the sampling frequency of the sampling resistor voltage signal. The changing trends of the amplified voltage signal include positive and negative trends.

4. The capacity calculation method for lithium thionyl chloride batteries applied to low-power Cat1 gateways according to claim 1, characterized in that, The voltage change curve segments obtained include: The current voltage value is obtained by acquiring the voltage value of the reference capacitor based on the periodic interrupt signal; Select the voltage value of a reference capacitor preceding the current voltage value and the voltage value of a reference capacitor following the current voltage value in the sequential sequence, and calculate the intermediate value between the two voltage values; The intermediate value is used as the sampled voltage value corresponding to the periodic interrupt signal; The collected voltage values ​​are used in the process of obtaining subsequent intermediate values.

5. The capacity calculation method for lithium thionyl chloride batteries applied to low-power Cat1 gateways according to claim 1, characterized in that, When acquiring the sampling resistor voltage signal located in the lithium thionyl chloride battery power supply circuit according to the set frequency, it also includes identifying voltage drop signals; When identifying voltage drop signals, a high-frequency sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is used to acquire the signal. When the resistor voltage signal obtained by high-frequency acquisition has a steep falling edge, the steep falling edge is tracked until it disappears, and then the sampling resistor voltage signal located on the lithium thionyl chloride battery power supply circuit is acquired at a set frequency.

6. A capacity measurement circuit for lithium thionyl chloride batteries used in low-power Cat1 gateways, characterized in that, The capacity measurement circuit includes: One or more memories for storing instructions; and One or more processors are configured to retrieve and execute the instructions from the memory to perform the method as described in any one of claims 1 to 5.

Images