Voltage detection circuit and voltage detection method

Abstract

This application discloses a voltage detection circuit and a voltage detection method. [Solution] This voltage detection circuit includes a voltage conversion module configured to convert an analog signal corresponding to the target voltage of a received target battery cell into a target voltage digital quantity; a logic processing module connected to the voltage conversion module and configured to output a target signal to a high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity; and a high-side drive module connected to the logic processing module and configured to determine whether or not to cut off external power supply based on the target signal.

Description

Technical Field

[0001] This application was filed with the Chinese Patent Office on September 25, 2024, claiming the priority of Chinese patent applications with application numbers 202411345737.7 and 202422354182.4. All the contents of the above applications are incorporated herein by reference. This application relates to the technical field of voltage detection, specifically to a voltage detection circuit and a voltage detection method.

Background Art

[0002] Cell voltage detection diagnosis and protection are basic requirements of a battery management controller (BMS), and are necessary conditions to ensure the safety of the BMS and prevent thermal runaway.

Summary of the Invention

Problems to be Solved by the Invention

[0003] However, generally, the detection diagnosis function and the protection function are realized by a combination of multiple different IC functional circuits. For example, one is responsible for the acquisition diagnosis function, and the other is responsible for the protection execution function. In such a method, the cost and the design difficulty are relatively high, the failure occurrence frequency is relatively high, and the reliability of cell voltage detection diagnosis and protection may be relatively poor.

[0004] In view of the situation in the related art where the reliability of cell voltage detection diagnosis and protection is relatively poor due to realizing cell voltage detection diagnosis and protection by different IC functional circuits, currently, no effective solution has been proposed yet.

Means for Solving the Problems

[0005] According to a first aspect, the present application provides a voltage detection circuit. This voltage detection circuit includes a voltage conversion module configured to convert an analog signal corresponding to a target voltage of a received target battery cell into a target voltage digital quantity; a logic processing module connected to the voltage conversion module and configured to output a target signal to a high-side drive module based on a comparative detection result between a preset threshold and the target voltage digital quantity; and a high-side drive module connected to the logic processing module and configured to determine whether or not to cut off external power supply based on the target signal.

[0006] In a second aspect, the present application provides a voltage detection method. This method includes: a voltage conversion module converting an analog signal corresponding to a target voltage of a received target battery cell into a target voltage digital quantity; a logic processing module outputting a target signal to a high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity; and the high-side drive module determining whether or not to cut off external power supply based on the target signal.

[0007] According to a third aspect, the present application provides an electronic device comprising one or more processors and memory, the memory being configured to store one or more processors in order to implement the voltage detection method described in any one of the above. [Effects of the Invention]

[0008] The beneficial effects of this application are as follows: This application solves the problem in related technologies where the reliability of cell voltage detection and diagnostic protection is relatively poor by employing a device comprising: a voltage conversion module configured to convert an analog signal corresponding to the target voltage of a received target battery cell into a target voltage digital quantity; a logic processing module connected to the voltage conversion module and configured to output a target signal to a high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity; and a high-side drive module connected to the logic processing module and configured to determine whether or not to cut off external power supply based on the target signal. In this solution, the voltage conversion module converts the analog signal corresponding to the voltage of the target battery cell into a target voltage digital quantity, the logic processing module outputs a target signal to the high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity, and finally the high-side drive module determines whether or not to cut off external power supply based on the target signal. This integrated method between the voltage conversion module, logic processing module, and high-side drive module realizes cell voltage detection and diagnostic protection and further improves the reliability of cell voltage detection and diagnostic protection. [Brief explanation of the drawing]

[0009] [Figure 1] This is one schematic diagram of a voltage detection circuit according to an embodiment of this application. [Figure 2] This is a schematic diagram of the voltage detection circuit according to an embodiment of this application. [Figure 3] This is a schematic diagram of a voltage conversion module according to an embodiment of this application. [Figure 4] This is a schematic diagram of a voltage conversion module according to an embodiment of this application. [Figure 5] This is a schematic diagram of a voltage conversion module according to an embodiment of this application. [Figure 6] This is a schematic diagram of the voltage detection circuit according to the embodiment of this application. [Figure 7]This is a schematic diagram of a logic processing module according to an embodiment of this application. [Figure 8] This is schematic diagram 4 of the voltage detection circuit according to the embodiment of this application. [Figure 9] This is a schematic diagram of a voltage detection circuit according to an embodiment of the present application. [Figure 10] This is a schematic diagram of the voltage detection circuit according to the embodiment of this application, figure 6. [Figure 11] This is a schematic diagram of a booster pump according to an embodiment of this application. [Figure 12] This is a flowchart of the voltage detection method according to an embodiment of this application. [Modes for carrying out the invention]

[0010] The present application will be described below in conjunction with optional implements. Figure 1 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application. As shown in Figure 1, this voltage detection circuit includes a voltage conversion module 10, a logic processing module 20, and a high-side drive module 30.

[0011] The voltage conversion module 10 is configured to convert an analog signal corresponding to the target voltage of the received target battery cell into a digital quantity of the target voltage. The logic processing module 20 is connected to the voltage conversion module 10 and is configured to output a target signal to the high-side drive module 30 based on the comparison detection result between a preset threshold and a target voltage digital quantity. The high-side drive module 30 is connected to the logic processing module 20 and is configured to determine whether or not to cut off external power supply based on a target signal.

[0012] Optionally, as shown in Figure 1, the voltage detection circuit according to the embodiment of this application includes at least a voltage conversion module 10, a logic processing module 20, and a high-side drive module 30. The voltage conversion module 10 is connected to the logic processing module 20, and the logic processing module 20 is connected to the high-side drive module 30. The voltage conversion module 10 receives an analog signal corresponding to the target voltage of the target battery cell. Alternatively, the voltage of the target battery cell can be collected by a voltage sampling device, and the collected voltage can be input to a receiving pin through the voltage conversion module 10. After receiving the analog signal corresponding to the target voltage of the target battery cell, the voltage conversion module 10 discretely converts the analog voltage signal into a numerical value, filters and extracts a digital signal, converts the obtained digital amount into an accurate voltage digital amount, and further obtains the target voltage digital amount.

[0013] After obtaining the target voltage digital quantity, the voltage conversion module 10 can transmit it to the logic processing module 20 via the serial peripheral interface (SPI interface). The logic processing module 20 outputs the target signal to the high-side drive module 30 based on the comparison detection result between a preset threshold and the target voltage digital quantity, i.e., the logic processing module performs a threshold determination. Based on the threshold determination result, it triggers a response signal to the high-side drive module 30. The high-side drive module 30 decides whether or not to cut off the external power supply based on the target signal. For example, when the cell voltage value reaches the placement threshold, the CMD logic control signal of the high-side drive module 30 is triggered to perform an off operation, thereby cutting off the external power supply to the battery and protecting it.

[0014] The CMD logic control signals of the high-side drive module 30 are logic signals configured to control the on / off state of the high-side driver, and in the application of the high-side driver, these signals can be controlled by an SPI interface or other communication protocol.

[0015] Note that the logic processing module 20 may be implemented by a digital comparator or a voltage detector.

[0016] As described above, after the voltage conversion module converts the analog signal corresponding to the voltage of the target battery cell into the target voltage digital quantity, the logic processing module outputs the target signal to the high-side drive module based on the comparison detection result between the preset threshold value and the target voltage digital quantity. Finally, the high-side drive module determines whether to cut off the power supply from the outside based on the target signal, realizes the cell voltage detection diagnosis protection in the integrated manner among the voltage conversion module, the logic processing module and the high-side drive module, and further achieves the effect of enhancing the reliability of the cell voltage detection diagnosis protection.

[0017] Optionally, in the voltage detection circuit according to the embodiment of the present application, the voltage conversion module 10 further includes an analog modulation module 100 connected to the digital filtering module 101, configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal; a digital filtering module 101 configured to process the modulated signal to obtain a target digital signal corresponding to the target voltage; and a digital correction module 102 connected to the digital filtering module 101, configured to obtain the target voltage digital quantity based on the target digital signal.

[0018] In an optional embodiment, as shown in FIG. 2, the voltage conversion module 10 consists of an analog modulation module 100, a digital filtering module 101, and a digital correction module 102. The analog modulation module 100 is configured to modulate an analog signal corresponding to a target voltage to obtain a modulated signal. For example, after performing a discretization process on the analog signal, the digital filtering module 101 filters and extracts a digital signal from the discretized signal to obtain a target digital signal corresponding to the target voltage. In order to improve the accuracy of the digital signal, the digital correction module 102 checks and codes the target digital signal to obtain an accurate voltage digital quantity. In an optional embodiment, the digital correction module 102 can also check and code the digital quantity based on the parameters of the NVM configuration to further obtain the target voltage digital quantity.

[0019] The analog modulation module 100, the digital filtering module 101, and the digital correction module 102 can accurately extract and obtain the voltage digital quantity corresponding to the battery cell.

[0020] Optionally, in the voltage detection circuit according to the embodiment of the present application, the analog modulation module 100 further includes a first switch 1000 configured to filter and control the voltage of the received target battery cell and input an analog signal corresponding to the target voltage to an analog modulator 1001, and an analog modulator 1001 configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal.

[0021] In one selective embodiment, as shown in Figure 3, the analog modulation module 100 consists of a first switch 1000 and an analog modulator 1001. When a voltage collected by a voltage collection device is input to the pins of the voltage conversion module 10, the first switch 1000 performs filtering control on the received voltage of the target battery cell. The voltage detection circuit according to the embodiment of this application enables voltage detection protection control for each cell of the target battery, and the first switch 1000 can realize input control for the voltage of each cell. The first switch 1000 inputs an analog signal corresponding to the controlled target voltage to the analog modulator 1001, and the analog modulator 1001 modulates the analog signal corresponding to the target voltage, making it easy to obtain the modulated signal. Voltage detection protection for each cell of the target battery can be realized with the above device.

[0022] Optionally, in the voltage detection circuit according to the embodiment of this application, the digital filtering module 101 includes a digital filter 1010 connected to the analog modulation module 100 and configured to perform digital filtering on the modulated signal to obtain an initial digital signal corresponding to a target voltage, and a first digital signal processor 1011 connected to the digital filter 1010 and configured to perform averaging on the initial digital signal to obtain a target digital signal.

[0023] In one optional embodiment, as shown in Figure 4, the digital filtering module 101 consists of a digital filter 1010 and a first digital signal processor 1011, where the digital filter 1010 is connected to the analog modulation module 100, and the first digital signal processor 1011 is connected to the digital filter 1010.

[0024] The analog modulation module 100 processes the analog voltage signal by discretely converting it into numerical values, then inputs the modulated signal to the digital filter 1010. The digital filter 1010 filters and extracts the digital signal to obtain the initial digital signal. The initial digital signal is then input to the first digital signal processor 1011, which performs an averaging process on the initial digital signal to obtain the target digital signal. The digital filter 1010 and the first digital signal processor 1011 effectively improve the accuracy of the target digital signal.

[0025] Optionally, in the voltage detection circuit according to the embodiment of this application, the digital correction module 102 includes a digital corrector 1020 connected to the digital filtering module 101 and configured to correct a target digital signal and obtain a corrected digital signal; a second digital signal processor 1021 connected to the digital corrector 1020 and configured to perform averaging processing on the corrected digital signal and obtain a processed digital signal; and a second switch 1022 connected to the digital corrector 1020 and configured to perform filtering control on the processed digital signal and obtain a target voltage digital amount.

[0026] In one optional embodiment, as shown in Figure 5, the digital correction module 102 comprises a digital corrector 1020, a second digital signal processor 1021, and a second switch 1022, where the digital corrector 1020 is connected to the digital filtering module 101, the second digital signal processor 1021 is connected to the digital corrector 1020, and the second switch 1022 is connected to the digital corrector 1020.

[0027] To improve the accuracy of the digital signal, the digital corrector 1020 checks and codes the digital quantity based on the NVM arrangement parameters to obtain an accurate voltage digital quantity, i.e., a corrected digital signal. The second digital signal processor 1021 then performs averaging again on the corrected digital signal to obtain a processed digital signal. Since the battery has multiple cells, i.e., multiple different voltage values, it is necessary to set the second switch 1022 to perform filtering control in order to easily obtain the target voltage digital quantity after obtaining the processed digital signal.

[0028] In one optional embodiment, the voltage conversion module 10 may also be configured with a diagnostic module (DIAG), which can monitor and diagnose the accuracy of the voltage value and detect whether the voltage conversion module 10 is operating normally, or whether there are any situations where the voltage exceeds a threshold.

[0029] Optionally, in the voltage detection circuit according to the embodiment of this application, the logic processing module 20 further includes an electronic buffer 200 configured to receive a control signal and drive the operation of a logic gate module 201, and a logic gate module 201 configured to output a target signal to a high-side drive module 30 based on a comparative detection result between a preset threshold and a target voltage digital quantity.

[0030] In one optional embodiment, as shown in Figure 6, the logic processing module 20 consists of an electronic buffer 200 and a logic gate module 201. Here, the electronic buffer 200 is connected to the logic gate module 201 and receives control signals from the electronic buffer 200 to drive the operation of the logic gate module 201. After receiving the drive signal, the logic gate module 201 outputs a target signal to the high-side drive module 30 based on the comparison detection result between a preset threshold and a target voltage digital quantity.

[0031] Optionally, in the voltage detection circuit according to the embodiment of this application, the logic gate module 201 includes a serial peripheral interface 2010 configured to receive a target voltage digital amount and write the target voltage digital amount to a register 2011, a register 2011 configured to store the target voltage digital amount, and a logic gate 2012 configured to output a target signal to the high-side drive module 30 based on a comparative detection result between a preset threshold and the target voltage digital amount.

[0032] In one optional embodiment, as shown in Figure 7, the logic gate module 201 consists of a serial peripheral interface 2010, a register 2011, and a logic gate 2012. The serial peripheral interface 2010 receives a target voltage digital quantity and writes the target voltage digital quantity to the register 2011. The logic gate 2012 outputs a target signal to the high-side drive module 30 based on the comparison detection result between a preset threshold and the target voltage digital quantity. That is, the logic gate 2012 performs threshold determination and outputs a target signal to the high-side drive module. For example, when the cell voltage value reaches the placement threshold, the CMD logic control signal of the high-side drive module is triggered to perform an off operation, thereby cutting off external power supply and providing protection.

[0033] The high-side drive module 30 consists of a field-effect transistor.

[0034] Optionally, in the voltage detection circuit according to the embodiment of this application, the logic processing module 20 further includes a CRC generator 202 configured to check the target voltage digital quantity.

[0035] In one optional embodiment, as shown in Figure 8, the logic processing module 20 further includes a CRC generator 202, where CRC (Cyclic Redundancy Check) is a cyclic redundancy check. The CRC generator 202 detects and corrects data errors, preventing inaccurate measurements due to data transmission or storage errors.

[0036] Optionally, in the voltage detection circuit according to the embodiment of this application, the voltage detection circuit further includes a boost module 40 connected to a high-side drive module 30 and a logic processing module 20, wherein the logic processing module 20 provides a clock signal to the boost module 40, causing the boost module 40 to output a preset voltage value to the high-side drive module 30, thereby driving the operation of the high-side drive module 30 based on the preset voltage value.

[0037] In one optional embodiment, in order to realize the high-side drive function described above, a boost module circuit is required in the voltage detection circuit according to the embodiment of this application. Therefore, as shown in Figure 9, a boost module 40 is further provided in the voltage detection circuit, and here the boost module 40 is connected to the high-side drive module 30 and the logic processing module 20. The logic processing module 20 provides a clock signal to the boost module 40, so that the boost module 40 outputs a preset voltage value to the high-side drive module 30 and drives the operation of the high-side drive module 30 based on the preset voltage value. The boost module 40 may also be a Charge Pump boost module circuit. The boost module circuit drives the high-side drive module 30 to perform an off operation, thereby cutting off and protecting it from external power supply.

[0038] Optionally, in the voltage detection circuit according to the embodiment of this application, the boost module 40 includes a charge pump 400 configured to provide a preset voltage value to the high-side drive module 30 based on a clock signal output from the logic processing module 20, and an undervoltage / overvoltage protection module 401 configured to protect the boost module 40.

[0039] In one optional embodiment, as shown in Figure 10, the boost module 40 includes a charge pump 400 and an undervoltage / overvoltage protection module 401, which provides a drive voltage to the high-side drive module 30 based on a clock signal output from the logic processing module 20 via the charge pump 400. The undervoltage / overvoltage protection module 401 is configured to protect the boost module 40 when an overvoltage or undervoltage occurs.

[0040] In one optional embodiment, as shown in the schematic diagram of the charging pump 400 in Figure 11, the logic processing module outputs a CLKn / CLK switch signal. When the CLKn signal is high level CLKn and the switch is off, capacitor CP1 receives a voltage via V and charges up to VCP1-V=V-VDiodes. At this time, the voltage of capacitor CP2 to ground is VCP2-GND=V+VCP2-V, and since the voltage value of VCP2-GND is close to twice V, capacitor CP2 charges capacitor CTank, resulting in a voltage increase, where VDiodes is the forward conduction pressure drop of the diode.

[0041] When the CLK signal is high level CLK and the switch is off, capacitor CP2 receives a voltage via V and charges up to VCP2-V=V-2Vdiodes. At this time, the voltage of capacitor CP1 to ground is VCP1-GND=V+VCP1-V, and since the voltage value of VCP1-GND is close to twice V, capacitor CP1 charges capacitor CTank, achieving a voltage increase. The logic processing module continuously outputs the CLKn / CLK switch signal, and eventually the voltage of capacitor CTank reaches the set voltage value VCP, thereby fulfilling the internal boost demand of the chip, i.e., providing a drive voltage to the high-side drive module 30.

[0042] In one optional embodiment, the implementation process for the analysis method for the quantification reliability of a voltage detection circuit is as follows.

[0043] (1) Calculate the total loss efficiency of the voltage detection circuit based on the IEC 62380 standard, decompose the loss efficiency of the related module of the voltage detection circuit, and refer to Table 1 for details.

[0044] (2) DFMEA analysis establishes a reliable safety response mechanism for the failure of the cell voltage sampling diagnostic protection function of the voltage detection circuit. For example, SM_01 Analog signal self-test comparison, SM_02 CRC check for standardized parameter download, SM_03 Independent CRC generator and detection circuit, SM_04 Analog multiplex circuit sampling switch to digital-to-analog conversion decoding threshold self-test, SM_05 Digital-to-analog conversion open circuit diagnosis, SM_06 Fault injection self-test, SM_07 Digital-to-analog conversion rationality inspection, SM_08 Charge pump overvoltage / undervoltage diagnosis, SM_09 Power supply overvoltage / undervoltage diagnosis, SM_10 Analog self-test, and SM_11 Drive comparison self-test. The coverage rate of the relevant diagnoses is defined in reference to ISO 26262. For details, please refer to Table 1.

[0045] (3) A quantified FMEDA analysis is performed on the voltage detection circuit with reference to the ISO 26262 standard, and the analysis is extended to the components inside the integrated chip of the voltage detection circuit. (2) By diagnosing the component failure efficiency in (1) with the countermeasure mechanism, the failure rate for residual or single failure points is 0.238734 FIT, and the failure rate for potential multipoint failures is 0.17130861 FIT. The analysis process is shown in Table 1.

[0046] [Table 1]

[0047] The voltage detection circuit according to the embodiment of this application solves the problem in related technologies where the reliability of cell voltage detection diagnostic protection is relatively poor by realizing cell voltage detection diagnostic protection through different IC functional circuits. This solution involves a voltage conversion module configured to convert an analog signal corresponding to the target voltage of a received target battery cell into a target voltage digital quantity, a logic processing module connected to the voltage conversion module and configured to output a target signal to a high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity, and a high-side drive module connected to the logic processing module and configured to determine whether or not to cut off external power supply based on the target signal. In this solution, the voltage conversion module converts the analog signal corresponding to the voltage of the target battery cell into a target voltage digital quantity, the logic processing module outputs a target signal to the high-side drive module based on a comparison detection result between a preset threshold and the target voltage digital quantity, and finally the high-side drive module determines whether or not to cut off external power supply based on the target signal. This integrated method between the voltage conversion module, logic processing module, and high-side drive module realizes cell voltage detection diagnostic protection and further improves the reliability of cell voltage detection diagnostic protection.

[0048] Figure 12 is a flowchart of the voltage detection method according to an embodiment of this application. As shown in Figure 11, this method is Step S1201, in which the voltage conversion module converts the analog signal corresponding to the target voltage of the received target battery cell into a digital quantity of the target voltage, Step S1202, in which the logic processing module outputs a target signal to the high-side drive module based on the comparison detection result between a preset threshold and the target voltage digital quantity, The high-side drive module includes step S1203, which determines whether or not to cut off the external power supply based on the target signal.

[0049] The voltage conversion module receives an analog signal corresponding to the target voltage of the target battery cell. Alternatively, the voltage of the target battery cell can be collected using a voltage sampling device, and the collected voltage can then be input to the receiving pin of the voltage conversion module. After receiving the analog signal corresponding to the target voltage of the target battery cell, the voltage conversion module discretely converts the analog voltage signal into a numerical value, filters and extracts the digital signal, converts the obtained digital value into an accurate voltage digital value, and then obtains the target voltage digital value.

[0050] After obtaining the target voltage digital quantity, the voltage conversion module can transmit it to the logic processing module via the serial peripheral interface (SPI interface). The logic processing module outputs the target signal to the high-side drive module based on the comparison detection result between a preset threshold and the target voltage digital quantity, i.e., the logic processing module performs a threshold determination. Based on the threshold determination result, it triggers a response signal to the high-side drive module. The high-side drive module decides whether or not to cut off the external power supply based on the target signal. For example, when the cell voltage value reaches the placement threshold, the high-side drive module's CMD logic control signal is triggered to cut off the external power supply and protect the system by performing an off operation.

[0051] Embodiments of this application provide a computer-readable storage medium in which a program is stored, and realize the voltage detection method when this program is executed by a processor.

[0052] Embodiments of this application provide a processor configured to run a program, wherein the voltage detection method is performed while the program is running.

[0053] Embodiments of this application provide an electronic device comprising a processor, memory, and a program stored in the memory and runnable by the processor, which implements a voltage detection method when the processor executes the program.

[0054] Those skilled in the art should understand that embodiments of this application may be provided as methods, systems, or computer program products. Therefore, this application may take the form of complete hardware embodiments, complete software embodiments, or embodiments combining software and hardware. Furthermore, this application may take the form of a computer program product implemented on one or more computer-compatible storage media (including, but not limited to, magnetic disk memory, CD-ROM, optical memory, etc.) containing computer-compatible program code.

[0055] This application is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of this application. It should be understood that each flow and / or block in the flowcharts and / or block diagrams, and combinations of flows and / or blocks in the flowcharts and / or block diagrams, may be implemented by computer program instructions. A machine can be generated by providing these computer program instructions to the processor of a general-purpose computer, a dedicated computer, an embedded processor, or another programmable data processing device, thereby generating a device configured to implement the functions specified in one flow of a flowchart or one or more blocks of multiple flows and / or block diagrams by instructions executed by the processor of the computer or other programmable data processing device.

[0056] These computer program instructions may also be stored in computer-readable memory that can guide a computer or other programmable data processing device to operate in a particular manner, thereby generating a product that includes an instruction unit that implements one or more flows in a flowchart and / or one or more blocks in a block diagram.

[0057] These computer program instructions may be loaded into a computer or other programmable data processing device, thereby generating processing implemented by the computer by causing the computer or other programmable device to execute a series of operational steps, so that the instructions executed by the computer or other programmable device provide steps to implement a function specified in one or more flows of a flowchart and / or one or more blocks of a block diagram.

[0058] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0059] Memory can include non-persistent memory, random-access memory (RAM), and / or non-volatile memory in computer-readable media, such as read-only memory (ROM) or flash memory (flash RAM). Memory is an example of computer-readable media.

[0060] Computer-readable media include both persistent and non-persistent media, and removable and non-removable media may store information in any way or technique. Information may be computer-readable instructions, data structures, program modules, or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random-access memory (SRAM), dynamic random-access memory (DRAM), other types of random-access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technologies, compact disk read-only memory (CD-ROM), digital multifunction disk (DVD) or other optical storage, cartridge-type magnetic tape, tape magnetic disk storage or other magnetic storage devices, or any other non-transmission media for storing information accessible by a computing device. As defined herein, computer-readable media does not include transient computer-readable media, such as modulated data signals or carriers. [Explanation of Symbols]

[0061] 10 Voltage conversion modules 20 Logical Processing Modules 30 High-Side Drive Modules 100 Analog Modulation Modules 101 Digital Filtering Module 102 Digital Correction Module 1000 First switch 1001 Analog Modulator 1010 Digital Filter 1011 First Digital Signal Processor 1020 Digital Corrector 1021 Second Digital Signal Processor 1022 Second switch 200 Electronic Buffer 201 Logic Gate Module 202 CRC Generator 2010 Serial Peripheral Interface 2011 Register 2012 Logic Gates 40 Boost Modules 400 Rechargeable Pump 401 Undervoltage / Overvoltage Protection Module

Claims

1. A voltage detection circuit, A voltage conversion module (10) is configured to convert an analog signal corresponding to the target voltage of a received target battery cell into a digital quantity of the target voltage, A logic processing module (20) connected to the voltage conversion module (10) and configured to output a target signal to the high-side drive module (30) based on the comparison detection result between a preset threshold and the target voltage digital quantity, A voltage detection circuit including the high-side drive module (30) connected to the logic processing module (20) and configured to determine whether or not to cut off external power supply based on the target signal.

2. The voltage conversion module (10) is An analog modulation module (100) connected to a digital filtering module (101) is configured to modulate an analog signal corresponding to a target voltage and obtain a modulated signal, A digital filtering module (101) is configured to process the modulated signal and obtain a target digital signal corresponding to the target voltage, The voltage detection circuit according to claim 1, further comprising a digital correction module (102) connected to the digital filtering module (101) and configured to obtain the target voltage digital quantity based on the target digital signal.

3. The analog modulation module (100) is A first switch (1000) is configured to perform filtering control on the received voltage of a target battery cell and input an analog signal corresponding to the target voltage to an analog modulator (1001), The voltage detection circuit according to claim 2, further comprising an analog modulator (1001) configured to modulate an analog signal corresponding to the target voltage and obtain a modulated signal.

4. The aforementioned digital filtering module (101) A digital filter (1010) is connected to the analog modulation module (100) and is configured to perform digital filtering on the modulated signal to obtain an initial digital signal corresponding to the target voltage, The voltage detection circuit according to claim 2, further comprising a first digital signal processor (1011) connected to the digital filter (1010) and configured to perform averaging on the initial digital signal to obtain the target digital signal.

5. The aforementioned digital correction module (102) A digital corrector (1020) is connected to the digital filtering module (101) and is configured to correct the target digital signal and obtain a corrected digital signal, A second digital signal processor (1021) is connected to the digital corrector (1020) and is configured to perform average value processing on the corrected digital signal to obtain a processed digital signal, The voltage detection circuit according to claim 2, further comprising a second switch 1022 connected to the digital corrector (1020) and configured to perform filtering control on the processed digital signal to obtain the target digital voltage amount.

6. The aforementioned logic processing module (20) An electronic buffer (200) configured to receive a control signal and drive the operation of a logic gate module (201), The voltage detection circuit according to claim 1, further comprising a logic gate module (201) configured to output a target signal to a high-side drive module (30) based on a comparison detection result between a preset threshold and the target voltage digital quantity.

7. The aforementioned logic gate module (201) A serial peripheral interface (2010) is configured to receive the target voltage digital quantity and write the target voltage digital quantity to a register (2011), The register (2011) is configured to store the target voltage digital amount, The voltage detection circuit according to claim 6, further comprising a logic gate (2012) configured to output a target signal to a high-side drive module (30) based on a comparison detection result between the preset threshold and the target voltage digital quantity.

8. The aforementioned logic processing module (20) The voltage detection circuit according to claim 6, further comprising a CRC generator (202) configured to check the aforementioned target voltage digital quantity.

9. The voltage detection circuit is A voltage detection circuit according to any one of claims 1 to 8, further comprising a boost module (40) connected to the high-side drive module (30) and the logic processing module (20), wherein the logic processing module (20) provides a clock signal to the boost module (40), causing the boost module (40) to output a preset voltage value to the high-side drive module (30), and driving the operation of the high-side drive module (30) based on the preset voltage value.

10. The aforementioned boost module (40) A charging pump (400) is configured to provide the high-side drive module (30) with the preset voltage value based on the clock signal output from the logic processing module (20), The voltage detection circuit according to claim 9, further comprising an undervoltage / overvoltage protection module 401 configured to protect the boost module (40).

11. A voltage detection method, The voltage conversion module converts the analog signal corresponding to the target voltage of the received target battery cell into a digital quantity of the target voltage, The logic processing module outputs a target signal to the high-side drive module based on the comparison detection result between a preset threshold and the target voltage digital quantity. A voltage detection method comprising determining whether or not to interrupt the external power supply based on the target signal using the high-side drive module.

12. An electronic device comprising one or more processors and memory, wherein the memory is configured to store one or more programs, and where, when the one or more programs are executed by the one or more processors, the one or more processors are made to implement the voltage detection method described in claim 11.

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