Voltage sensing circuit and voltage sensing method

Abstract

A voltage sensing circuit and a voltage sensing method. The voltage sensing circuit comprises: a voltage conversion module (10), configured to convert an analog signal corresponding to a received target voltage of a target battery cell into a target voltage digital quantity; a logic processing module (20), connected to the voltage conversion module (10) and configured to output a target signal to a high-side drive module (30) on the basis of a comparison sensing result between a preset threshold and the target voltage digital quantity; and the high-side drive module (30), connected to the logic processing module (20) and configured to determine, on the basis of the target signal, whether to cut off an external power supply.

Description

Voltage detection circuit and voltage detection method

[0001] This application claims priority to Chinese patent applications filed on September 25, 2024, with application numbers 202411345737.7 and 202422354182.4, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of voltage detection technology, and more specifically, to a voltage detection circuit and a voltage detection method. Background Technology

[0003] Cell voltage detection, diagnosis, and protection are fundamental requirements of battery management controllers (BMS) and are essential for ensuring BMS safety and preventing thermal runaway. Technical issues

[0004] However, the detection, diagnostic, and protection functions are usually implemented by combining multiple different IC functional circuits, such as one responsible for data acquisition and diagnostic functions, and another responsible for protection execution functions. This approach is costly and difficult to design, and also results in a higher frequency of failures and poor reliability of cell voltage detection, diagnosis, and protection.

[0005] Currently, there is no effective solution to the problem that the reliability of cell voltage detection, diagnosis and protection is poor due to the use of different IC functional circuits in related technologies. Technical solutions

[0006] In a first aspect, this application provides a voltage detection circuit. The voltage detection circuit includes: a voltage conversion module configured to convert an analog signal corresponding to the target voltage of a target battery cell into a digital value of the target voltage; a logic processing module connected to the voltage conversion module configured to output a target signal to a high-side driving module based on a comparison detection result between a preset threshold and the digital value of the target voltage; and the high-side driving module connected to the logic processing module configured to determine whether to cut off the external power supply based on the target signal.

[0007] Secondly, this application provides a voltage detection method. The method includes: converting an analog signal corresponding to the target voltage of a target battery cell into a digital value of the target voltage using a voltage conversion module; outputting a target signal to a high-side drive module based on a comparison detection result between a preset threshold and the digital value of the target voltage using a logic processing module; and determining whether to cut off the external power supply based on the target signal using the high-side drive module.

[0008] In a third aspect, the present application provides an electronic device, comprising one or more processors and a memory, the memory being configured to store the one or more processors to implement the voltage detection method of any one of the above. Advantages

[0009] The present application provides the following advantages: through the present application, the following device is adopted: a voltage conversion module, configured to convert an analog signal corresponding to a target voltage of a target battery cell into a target voltage digital quantity; a logic processing module, connected with the voltage conversion module, 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 with the logic processing module, configured to determine whether to cut off external power supply based on the target signal, thereby solving the problem of poor reliability of battery cell voltage detection and diagnosis protection in the related art caused by different IC function circuits. In the present application, the voltage conversion module converts the analog signal corresponding to the voltage of the target battery cell into the target voltage digital quantity, and then the logic processing module outputs the target signal to the high-side drive module based on the comparison detection result between the preset threshold and the target voltage digital quantity, and finally the high-side drive module determines whether to cut off external power supply based on the target signal, thereby realizing battery cell voltage detection and diagnosis protection through the integrated manner among the voltage conversion module, the logic processing module and the high-side drive module, and achieving the effect of improving the reliability of battery cell voltage detection and diagnosis protection. BRIEF DESCRIPTION OF DRAWINGS

[0010] FIG. 1 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0011] FIG. 2 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0012] FIG. 3 is a schematic diagram of a voltage conversion module according to an embodiment of the present application;

[0013] FIG. 4 is a schematic diagram of a voltage conversion module according to an embodiment of the present application;

[0014] FIG. 5 is a schematic diagram of a voltage conversion module according to an embodiment of the present application;

[0015] FIG. 6 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0016] FIG. 7 is a schematic diagram of a logic processing module according to an embodiment of the present application;

[0017] FIG. 8 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0018] FIG. 9 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0019] Fig. 10 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application;

[0020] Fig. 11 is a schematic diagram of a boost pump according to an embodiment of the present application;

[0021] Fig. 12 is a flowchart of a voltage detection method according to an embodiment of the present application.

[0022] wherein 10 is a voltage conversion module, 20 is a logic processing module, 30 is a high-side drive module, 100 is an analog modulation module, 101 is a digital filter module, 102 is a digital correction module, 1000 is a first switch, 1001 is an analog modulator, 1010 is a digital filter, 1011 is a first digital signal processor, 1020 is a digital corrector, 1021 is a second digital signal processor, 1022 is a second switch, 200 is an electronic buffer, 201 is a logic gate module, 202 is a CRC generator, 2010 is a serial peripheral interface, 2011 is a register, 2012 is a logic gate, 40 is a boost module, 400 is a charge pump, 401 is an under-voltage / over-voltage protection module.

[0023] Embodiments of the present application

[0024] The present application will be described below in conjunction with optional implementation devices. Fig. 1 is a schematic diagram of a voltage detection circuit according to an embodiment of the present application. As shown in Fig. 1, the voltage detection circuit includes a voltage conversion module 10, a logic processing module 20, and a high-side drive module 30.

[0025] The voltage conversion module 10 is configured to convert an analog signal corresponding to a target voltage of a target battery cell received into a target voltage digital quantity.

[0026] The logic processing module 20 is connected with the voltage conversion module 10 and is configured to output a target signal to the high-side drive module 30 based on a comparison detection result between a preset threshold value and the target voltage digital quantity.

[0027] The high-side drive module 30 is connected with the logic processing module 20 and is configured to determine whether to cut off external power supply based on the target signal.

[0028] Optionally, as shown in FIG. 1, the voltage detection circuit provided by the embodiment of the present application at least includes a voltage conversion module 10, a logic processing module 20 and a high-side drive module 30. The voltage conversion module 10 is connected with the logic processing module 20, and the logic processing module 20 is connected with the high-side drive module 30. The voltage conversion module 10 receives an analog signal corresponding to a target voltage of a target battery cell. It should be noted that the voltage of the target battery cell can be collected by a voltage collection device, and then the collected voltage is input to a receiving PIN pin in 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 quantizes and filters the analog voltage signal to extract a digital signal, and converts the obtained digital quantity into an accurate voltage digital quantity, and then obtains the above-mentioned target voltage digital quantity.

[0029] After obtaining the above-mentioned target voltage digital quantity, the voltage conversion module 10 can transmit to the logic processing module 20 through a serial peripheral interface (SPI interface), and the logic processing module 20 outputs a target signal to the high-side drive module 30 based on a comparison detection result between a preset threshold value and the target voltage digital quantity, that is, the logic processing module performs threshold judgment. According to the threshold judgment result, a response signal is triggered to the high-side drive module 30. The high-side drive module 30 determines whether to cut off the external power supply according to the target signal. For example, when the cell voltage value reaches the configured threshold value, the CMD logic control signal of the high-side drive module 30 is triggered to perform the shutdown action, so as to cut off the external power supply of the battery for protection.

[0030] It should be noted that the CMD logic control signal of the high-side drive module 30 refers to a logic signal set to control the switching state of the high-side driver. In the application of the high-side driver, these signals can be controlled through the SPI interface or other communication protocols.

[0031] It should be noted that the logic processing module 20 can be implemented by a digital comparator, and can also be implemented by a voltage detector.

[0032] In summary, the voltage corresponding to the analog signal of the target battery cell is converted into the target voltage digital quantity by the voltage conversion module, and then 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, whether to cut off the external power supply is determined by the high-side drive module based on the target signal. The cell voltage detection diagnosis protection is realized by the integrated way among the voltage conversion module, the logic processing module and the high-side drive module, and the reliability of the cell voltage detection diagnosis protection is improved.

[0033] Optionally, in the voltage detection circuit provided in the embodiments of the present application, the voltage conversion module 10 further comprises: an analog modulation module 100, connected with the digital filtering module 101, configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal; the 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 with the digital filtering module 101, configured to obtain the target voltage digital quantity based on the target digital signal.

[0034] In an optional embodiment, as shown in FIG. 2, the voltage conversion module 10 is composed of the analog modulation module 100, the digital filtering module 101 and the digital correction module 102. The analog modulation module 100 is configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal, for example, to perform discretization processing on the analog signal, and then the digital filtering module 101 filters the discretized signal to extract a digital signal, thereby obtaining the target digital signal corresponding to the target voltage. In order to improve the accuracy of the digital signal, the digital correction module 102 is used to verify and encode the target digital signal to obtain an accurate voltage digital quantity. It should be noted that, in an optional embodiment, the digital correction module 102 can verify and encode the digital quantity according to the parameters configured by the NVM, thereby obtaining the target voltage digital quantity.

[0035] Through the analog modulation module 100, the digital filtering module 101 and the digital correction module 102, the voltage digital quantity corresponding to the battery cell can be accurately extracted.

[0036] Optionally, in the voltage detection circuit provided in the embodiments of the present application, the analog modulation module 100 further comprises: a first switch 1000, configured to filter and control the voltage received by the target battery cell, so as to input the analog signal corresponding to the target voltage to the analog modulator 1001; and the analog modulator 1001, configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal.

[0037] In an optional embodiment, as shown in FIG. 3, the analog modulation module 100 is composed of a first switch 1000 and an analog modulator 1001. When the collected voltage is input to the PIN pin of the voltage conversion module 10 through the voltage collection device, the first switch 1000 is used to filter and control the voltage received from the target battery cell. It should be noted that the voltage detection circuit provided in the embodiments of the present application can detect and protect the voltage of each cell of the target battery. The input control of the voltage of each cell can be realized through the first switch 1000. The first switch 1000 inputs the analog signal corresponding to the controlled target voltage to the analog modulator 1001. The analog modulator 1001 modulates the analog signal corresponding to the target voltage to obtain a modulated signal. Through the above device, the voltage detection and protection of each cell of the target battery can be realized.

[0038] Optionally, in the voltage detection circuit provided in the embodiments of the present application, the digital filtering module 101 includes: a digital filter 1010, connected with the analog modulation module 100, configured to digitally filter the modulated signal to obtain an initial digital signal corresponding to the target voltage; and a first digital signal processor 1011, connected with the digital filter 1010, configured to perform average value processing on the initial digital signal to obtain a target digital signal.

[0039] In an optional embodiment, as shown in FIG. 4, the digital filtering module 101 is composed of a digital filter 1010 and a first digital signal processor 1011. The digital filter 1010 is connected with the analog modulation module 100, and the first digital signal processor 1011 is connected with the digital filter 1010.

[0040] After the analog voltage signal is discretely quantized by the analog modulation module 100, the modulated signal is input to the digital filter 1010. The digital filter 1010 filters and extracts the digital signal to obtain the initial digital signal. Then, the initial digital signal is input to the first digital signal processor 1011. The first digital signal processor 1011 performs average value processing on the initial digital signal to obtain the target digital signal. The digital filter 1010 and the first digital signal processor 1011 can effectively improve the accuracy of the target digital signal.

[0041] Optionally, in the voltage detection circuit provided in the embodiments of the present application, the digital correction module 102 comprises: a digital corrector 1020, connected with the digital filtering module 101, configured to correct the target digital signal to obtain a corrected digital signal; a second digital signal processor 1021, connected with the digital corrector 1020, configured to perform average value processing on the corrected digital signal to obtain a processed digital signal; and a second switch 1022, connected with the digital corrector 1020, configured to perform filtering control on the processed digital signal to obtain the target voltage digital quantity.

[0042] In an optional embodiment, as shown in FIG. 5, the digital correction module 102 is composed of the digital corrector 1020, the second digital signal processor 1021 and the second switch 1022, wherein the digital corrector 1020 is connected with the digital filtering module 101, the second digital signal processor 1021 is connected with the digital corrector 1020, and the second switch 1022 is connected with the digital corrector 1020.

[0043] In order to improve the accuracy of the digital signal, the digital corrector 1020 can verify and encode the digital quantity based on the parameters configured by the NVM to obtain an accurate voltage digital quantity, i.e., a corrected digital signal, and then the second digital signal processor 1021 performs average value processing on the corrected digital signal again to obtain a processed digital signal. It should be noted that since there are multiple cells in the battery, i.e., multiple different voltage values, after obtaining the processed digital signal, the second switch 1022 is still needed to perform filtering control in order to obtain the target voltage digital quantity.

[0044] In an optional embodiment, the voltage conversion module 10 can also be provided with a diagnosis module (DIAG), which monitors and diagnoses the accuracy of the voltage value. Through the DIAG, it can be detected whether the voltage conversion module 10 is working normally, whether there is a situation that the voltage exceeds the threshold value, etc.

[0045] Optionally, in the voltage detection circuit provided in the embodiments of the present application, the logic processing module 20 further comprises: an electronic buffer 200, configured to receive a control signal to drive the logic gate module 201 to work; and the logic gate module 201, configured to output a target signal to the high-side drive module 30 based on a comparison detection result between the preset threshold value and the target voltage digital quantity.

[0046] In an optional embodiment, as shown in FIG. 6, the logic processing module 20 is composed of an electronic buffer 200 and a logic gate module 201. The electronic buffer 200 is connected with the logic gate module 201, and receives a control signal through the electronic buffer 200 to drive the logic gate module 201 to work. After receiving the driving signal, the logic gate module 201 outputs a target signal to the high-side drive module 30 based on the comparison detection result between the preset threshold value and the target voltage digital quantity.

[0047] Optionally, in the voltage detection circuit provided in the embodiment of the present application, the logic gate module 201 comprises: a serial peripheral interface 2010, configured to receive the target voltage digital quantity and write the target voltage digital quantity into a register 2011; the register 2011, configured to store the target voltage digital quantity; and a logic gate 2012, configured to output the target signal to the high-side drive module 30 based on the comparison detection result between the preset threshold value and the target voltage digital quantity.

[0048] In an optional embodiment, as shown in FIG. 7, the logic gate module 201 is composed of the serial peripheral interface 2010, the register 2011 and the logic gate 2012. The serial peripheral interface 2010 receives the target voltage digital quantity and writes the target voltage digital quantity into the register 2011. The logic gate 2012 outputs the target signal to the high-side drive module 30 based on the comparison detection result between the preset threshold value and the target voltage digital quantity, that is, the threshold value is judged by the logic gate 2012 to output the target signal to the high-side drive module. For example, when the battery voltage value reaches the configured threshold value, the CMD logic control signal of the high-side drive module is triggered to perform the shutdown action, so as to cut off the external power supply for protection.

[0049] It should be noted that the high-side drive module 30 is composed of a field effect transistor.

[0050] Optionally, in the voltage detection circuit provided in the embodiment of the present application, the logic processing module 20 further comprises a CRC generator 202, configured to check the target voltage digital quantity.

[0051] In an optional embodiment, as shown in FIG. 8, the logic processing module 20 further comprises the CRC generator 202, which is cyclic redundancy check (CRC). The CRC generator 202 is used to detect and correct data errors, so as to prevent inaccurate measurement caused by data transmission or storage errors.

[0052] Optionally, in the voltage detection circuit provided by the embodiment of the present application, the voltage detection circuit further comprises: a voltage boosting module 40 connected with the high-side drive module 30 and the logic processing module 20, wherein the logic processing module 20 provides a clock signal for the voltage boosting module 40, so that the voltage boosting module 40 outputs a preset voltage value to the high-side drive module 30, to drive the high-side drive module 30 to work based on the preset voltage value.

[0053] In an optional embodiment, to realize the high-side drive function described above, the voltage detection circuit provided by the embodiment of the present application needs to be provided with a voltage boosting module circuit, therefore, as shown in FIG. 9, the voltage detection circuit is further provided with a voltage boosting module 40, wherein the voltage boosting module 40 is connected with the high-side drive module 30 and the logic processing module 20. The logic processing module 20 provides a clock signal for the voltage boosting module 40, so that the voltage boosting module 40 outputs a preset voltage value to the high-side drive module 30, to drive the high-side drive module 30 to work based on the preset voltage value. It should be noted that the voltage boosting module 40 can be a Charge Pump voltage boosting module circuit. The high-side drive module 30 is driven by the voltage boosting module circuit to perform the turn-off action, thereby cutting off the external power supply for protection.

[0054] Optionally, in the voltage detection circuit provided by the embodiment of the present application, the voltage boosting module 40 comprises: a charge pump 400 configured to provide a preset voltage value for the high-side drive module 30 based on a clock signal output by the logic processing module 20; and an under-voltage / over-voltage protection module 401 configured to protect the voltage boosting module 40.

[0055] In an optional embodiment, as shown in FIG. 10, the voltage boosting module 40 comprises the charge pump 400 and the under-voltage / over-voltage protection module 401. The charge pump 400 provides a driving voltage for the high-side drive module 30 based on a clock signal output by the logic processing module 20. The under-voltage / over-voltage protection module 401 is configured to protect the voltage boosting module 40 when over-voltage or under-voltage occurs.

[0056] In an optional embodiment, as shown in FIG. 11, which is a schematic diagram of the charge pump 400, the logic processing module outputs a CLKn / CLK switch signal. When the CLKn signal is at a high level and the CLK switch is closed, the capacitor CP1 is charged to VCP1-V=V-VDiodes through the V input voltage. At this time, the voltage of the capacitor CP2 to ground VCP2-GND=V+VCP2-V, and since the VCP2-GND voltage value is close to 2 times V. The capacitor CP2 will charge the capacitor CTank to achieve voltage lifting, wherein VDiodes is the forward conduction voltage drop of a diode.

[0057] When the CLK signal is high, the switch is closed, and the capacitor CP2 is charged to VCP2-V = V-2VDiodes by the V input voltage. At this time, the voltage of the capacitor CP1 to ground is VCP1-GND = V+VCP1-V, and since the VCP1-GND voltage value is close to 2 times V. The capacitor CP1 will charge the capacitor CTank to achieve voltage lifting. Through the logic processing module, the CLKn / CLK switch signal is output continuously, and finally the voltage of the capacitor CTank will reach the set voltage value VCP, thereby realizing the internal voltage boosting requirement of the chip, that is, providing a driving voltage for the high-side driving module 30.

[0058] In an optional embodiment, the implementation process of the quantitative reliability analysis method for the voltage detection circuit is as follows:

[0059] (1) The overall failure rate of the voltage detection circuit is calculated based on the IEC 62380 standard, and the failure rates of the related modules of the voltage detection circuit are decomposed, as shown in Table 1.

[0060] (2) The failure of the cell voltage acquisition diagnosis protection function of the voltage detection circuit is analyzed by DFMEA, and a reliability safety measure mechanism is formulated, such as: SM_01 analog signal self-checking comparison, SM_02 calibration parameter download CRC check, SM_03 independent CRC generator and detection circuit, SM_04 analog multi-channel acquisition switch to digital-analog conversion decoding threshold self-checking, SM_05 digital-analog conversion open circuit diagnosis, SM_06 fault injection self-checking, SM_07 digital-analog conversion reasonableness check, SM_08 charge pump over-voltage and under-voltage diagnosis, SM_09 power supply over-voltage and under-voltage diagnosis, SM_10 analog self-checking, SM_11 drive comparison self-checking, and the related diagnostic coverage is defined according to ISO 26262, as shown in Table 1.

[0061] (3) The voltage detection circuit is analyzed by FMEDA according to the ISO 26262 standard, and the internal components of the voltage detection circuit integrated chip are analyzed. The component failure rate in (1) is diagnosed by the measure mechanism in (2), so that the failure rate of the remaining or single-point fault is 0.238734 FIT, and the potential multi-point fault failure rate is 0.17130861 FIT, and the analysis process is shown in Table 1.

[0062] Component name failure rate (FIT) in the calculation to consider the reliability and safety related component failure mode failure distribution ( % ) remaining reliability and safety related failure rate ( FIT ) in the absence of reliability and safety mechanisms, violation of safety target failure mode? Prevent failure mode violation of reliability and safety target? Failure mode diagnostic coverage ( % ) remaining or single point failure failure rate ( FIT ) may cause violation of reliability and safety target failure mode? Prevent potential failure mode security mechanism? Potential failure mode coverage ( % ) potential multi-point failure failure rate ( FIT ) voltage conversion check diagnosis 1.5068 YES voltage conversion check diagnosis failure 100 1.5068 YES SM_07 SM_05 99.00.015068 YES SM_04, SM_06 99.00.0149173 logic processing 1.3652 YES logic processing failure 100 1.3652 YES SM_02 SM_03 99.00.013652 NO - - high side drive 2.84 YES high side drive failure 100 2.84 YES SM_01 SM_11 99.00.0284 NO - - charge pump 2.3643 YES charge pump failure 100 2.3643 YES SM_08 99.00.023643 NO - - power supply 15.797 YES power supply failure 100 15.7971 YES SM_09 99.00.157971 YES SM_10 99.00.1563913

[0063] The voltage detection circuit provided by the embodiments of the present application is configured to convert the analog signal corresponding to the target voltage of the target battery cell into a target voltage digital quantity through the voltage conversion module; the logic processing module is connected with the voltage conversion module and is configured to output a target signal to the high-side drive module based on the comparison detection result between the preset threshold and the target voltage digital quantity; and the high-side drive module is connected with the logic processing module and is configured to determine whether to cut off external power supply based on the target signal. The present application solves the problem of poor reliability of battery cell voltage detection and diagnosis protection in the prior art, which is caused by the use of different IC functional circuits to achieve battery cell voltage detection and diagnosis protection. In the present application, the voltage conversion module is used to convert the analog signal corresponding to the voltage of the target battery cell into a target voltage digital quantity, and then the logic processing module outputs a target signal to the high-side drive module based on the comparison detection result between the preset threshold and the target voltage digital quantity. Finally, the high-side drive module determines whether to cut off external power supply based on the target signal. The battery cell voltage detection and diagnosis protection is achieved by integrating the voltage conversion module, the logic processing module and the high-side drive module, thereby improving the reliability of battery cell voltage detection and diagnosis protection.

[0064] FIG. 12 is a flow chart of a voltage detection method according to an embodiment of the present application. As shown in FIG. 11, the method comprises the following steps:

[0065] In step S1201, the voltage conversion module converts the analog signal corresponding to the target voltage of the target battery cell into a target voltage digital quantity.

[0066] In step S1202, the logic processing module outputs a 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.

[0067] In step S1203, the high-side drive module determines whether to cut off the external power supply based on the target signal.

[0068] The voltage conversion module receives an analog signal corresponding to the target voltage of the target battery cell. It should be noted that the voltage of the target battery cell can be collected by a voltage collection device, and then the collected voltage is input to the receiving PIN pin in the voltage conversion module. After receiving the analog signal corresponding to the target voltage of the target battery cell, the voltage conversion module extracts a digital signal through analog voltage signal discrete quantization filtering, and converts the obtained digital quantity into an accurate voltage digital quantity, and then obtains the above-mentioned target voltage digital quantity.

[0069] After obtaining the above-mentioned target voltage digital quantity, the voltage conversion module can be transmitted to the logic processing module through a serial peripheral interface (SPI interface), and the logic processing module outputs a 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, that is, the logic processing module performs threshold value judgment. According to the threshold value judgment result, the triggered response signal is transmitted to the high-side drive module. The high-side drive module determines whether to cut off the external power supply according to the target signal. For example, when the cell voltage value reaches the configured threshold value, the CMD logic control signal of the high-side drive module is triggered to perform the shutdown action, so as to cut off the external power supply for protection.

[0070] The embodiment of the present application provides a computer readable storage medium, which stores a program, and the program is executed by a processor to realize the voltage detection method.

[0071] The embodiment of the present application provides a processor, which is arranged to run a program, wherein the program is executed to perform the voltage detection method.

[0072] The embodiment of the present application provides an electronic device, which comprises a processor, a memory, and a program stored in the memory and capable of running on the processor, and the processor executes the program to realize the voltage detection method.

[0073] Those skilled in the art will appreciate that embodiments of the present application can be readily used as software, hardware, or a combination of software and hardware. In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0074] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0075] These computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture including instructions which implement the function specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0076] These computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks or in conjunction with the flowcharts described above.

[0077] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0078] The memory can include non-persistent memory and / or volatile memory, such as a random access memory (RAM) including a cache area for the temporary storage of data. The memory can also include non-volatile memory, such as one or more magnetic data storage disks, optical data storage disks, or tape. The memory can include a computer readable medium that stores computer readable instructions, which, when executed by the processor, cause the computing device to perform operations.

[0079] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology for storage of information. The information can 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 disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media, such as modulated data signals and carriers.

Claims

1. A voltage detection circuit, comprising: a voltage conversion module (10) configured to convert an analog signal corresponding to a target voltage of a target battery cell into a target voltage digital quantity; a logic processing module (20) connected to the voltage conversion module (10) and configured to output a target signal to a high-side drive module (30) based on a comparison result between a preset threshold and the target voltage digital quantity; the high-side drive module (30) connected to the logic processing module (20) and configured to determine whether to cut off external power supply based on the target signal.

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

3. The voltage detection circuit of claim 2, wherein, The analog modulation module (100) further comprises: a first switch (1000) configured to filter control the voltage received by the target battery cell to input the analog signal corresponding to the target voltage to an analog modulator (1001); the analog modulator (1001) configured to modulate the analog signal corresponding to the target voltage to obtain a modulated signal.

4. The voltage detection circuit of claim 2, wherein, The digital filter module (101) comprises: a digital filter (1010) connected to the analog modulation module (100) and configured to digitally filter the modulated signal to obtain an initial digital signal corresponding to the target voltage; a first digital signal processor (1011) connected to the digital filter (1010) and configured to average the initial digital signal to obtain the target digital signal.

5. The voltage detection circuit of claim 2, wherein, The digital correction module (102) comprises: a digital corrector (1020) connected to the digital filter module (101) and configured to correct the target digital signal to obtain a corrected digital signal; a second digital signal processor (1021) connected to the digital corrector (1020) and configured to average the corrected digital signal to obtain a processed digital signal; a second switch (1022) connected to the digital corrector (1020) and configured to filter control the processed digital signal to obtain the target voltage digital quantity.

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

7. The voltage detection circuit of claim 6, wherein, The logic gate module (201) comprises: a serial peripheral interface (2010) configured to receive the target voltage digital quantity and write the target voltage digital quantity into a register (2011); the register (2011) configured to store the target voltage digital quantity; a logic gate (2012) configured to output a target signal to a high-side drive module (30) based on a comparison result between the preset threshold value and the target voltage digital quantity.

8. The voltage detection circuit of claim 6, wherein, The logic processing module (20) further comprises: a CRC generator (202) configured to check the target voltage digital quantity.

9. The voltage detection circuit according to any one of claims 1 to 8, wherein The voltage detection circuit further comprises: a boost module (40) connected with the high-side drive module (30) and the logic processing module (20), wherein the logic processing module (20) provides a clock signal for the boost module (40) to make the boost module (40) output a preset voltage value to the high-side drive module (30) to drive the high-side drive module (30) to work based on the preset voltage value.

10. The voltage detection circuit of claim 9, wherein, The boost module (40) comprises: a charge pump (400) configured to provide the preset voltage value for the high-side drive module (30) based on the clock signal output by the logic processing module (20); an under-voltage / over-voltage protection module 401 configured to protect the boost module (40).

11. A voltage detection method, comprising: converting an analog signal corresponding to a target voltage of a target battery cell into a target voltage digital quantity by a voltage conversion module; outputting a target signal to a high-side drive module based on a comparison result between a preset threshold value and the target voltage digital quantity by a logic processing module; determining whether to cut off external power supply based on the target signal by the high-side drive module.

12. An electronic device, comprising one or more processors and memory arranged to store one or more programs, wherein, The one or more programs, when executed by the one or more processors, cause the one or more processors to implement the voltage detection method of claim 11.

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