Voltage sampling method and device, medium, battery manager, system and vehicle

Abstract

The invention relates to a voltage sampling method and device, a medium, a battery manager, a system and a vehicle. The method comprises the steps that under the condition that an alternating current charging pile is used for conducting alternating current charging on a power battery, the fluctuation frequency of direct current output by a vehicle-mounted rectifier is obtained, and the fluctuation frequency is the frequency of alternating current components in the direct current and is related to the power grid frequency of the alternating current charging pile; adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the direct current; and performing voltage sampling on the power battery according to the adjusted voltage sampling frequency. The battery voltage sampling frequency is synchronously adjusted according to the alternating current side power grid frequency, the method can be adapted to alternating current charging scenes of different regions and different power grid frequencies, the method has the advantage of being wide in application range, the instantaneous maximum voltage of the battery can be accurately collected in time, the battery is prevented from being overcharged, and the battery charging efficiency is improved. The service life and the safety performance of the battery are effectively improved.

Description

Technical Field

[0001] This disclosure relates to the field of voltage sampling technology, and more particularly to a voltage sampling method, apparatus, medium, battery manager, system, and vehicle. Background Technology

[0002] When the power battery of a new energy vehicle is being charged, the battery management system will control the charging current in real time based on the collected maximum battery voltage and factors such as battery temperature to prevent overcharging.

[0003] However, when the AC power from the grid of the AC charging pile is rectified into DC power by the on-board rectifier to charge the power battery, the on-board rectifier does not have the same rectification capability as the DC charging pile due to limitations in size, weight, cost, and other factors. The DC current after rectification by the on-board rectifier still contains a certain frequency AC component. This current form is called pulsating DC, and its pulsation frequency is directly related to the frequency of the input AC power.

[0004] Due to the presence of pulsating direct current, the instantaneous maximum voltage sampling may be inaccurate or untimely when sampling the voltage of the power battery, which may lead to overcharging and damage to the battery. Summary of the Invention

[0005] To overcome the problems existing in related technologies, this disclosure provides a voltage sampling method, apparatus, storage medium, battery manager, system, chip, computer program product, and vehicle.

[0006] According to a first aspect of the present disclosure, a voltage sampling method is provided, the method comprising: When using an AC charging pile to AC charge a power battery, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile. The voltage sampling frequency of the power battery is adjusted according to the fluctuation frequency of the DC current. The voltage of the power battery is sampled according to the adjusted voltage sampling frequency.

[0007] Optionally, obtaining the fluctuation frequency of the DC current output by the vehicle rectifier includes: Obtain the grid frequency of the AC charging pile; Based on the electrical parameters of the on-board rectifier, the conversion frequency ratio parameter is obtained, which represents the ratio of the fluctuation frequency to the grid frequency. The fluctuation frequency of the DC current output by the vehicle rectifier is obtained based on the grid frequency and the conversion frequency ratio parameter.

[0008] Optionally, obtaining the fluctuation frequency of the DC current output by the vehicle rectifier further includes: The fluctuation frequency of the DC current is obtained through the message sent by the vehicle-mounted rectifier.

[0009] Optionally, adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current includes: Obtain the voltage sampling frequency coefficient of the power battery, wherein the voltage sampling frequency coefficient is greater than zero and less than 1; The voltage sampling frequency of the power battery is determined based on the fluctuation frequency and the coefficient.

[0010] Optionally, the method further includes: When the power battery is not charged, the voltage of the power battery is sampled at a preset fixed sampling frequency to obtain the static and / or dynamic voltage of the power battery.

[0011] Optionally, the power battery includes a power battery pack, and the method further includes: The voltage of each power battery in the power battery pack is sampled according to the adjusted voltage sampling frequency, and charging is stopped when the voltage of any power battery exceeds a set threshold.

[0012] According to a second aspect of the present disclosure, a voltage sampling device is provided, comprising: The acquisition module is configured to acquire the fluctuation frequency of the DC current output by the vehicle rectifier when the power battery is AC charged using an AC charging pile. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile. The adjustment module is configured to adjust the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; The sampling module is configured to sample the voltage of the power battery according to the adjusted voltage sampling frequency.

[0013] According to a third aspect of the present disclosure, a battery manager is provided, comprising: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions to implement the method described in any one of the first aspects.

[0014] According to a fourth aspect of the present disclosure, a computer-readable storage medium is provided that stores computer program instructions thereon, which, when executed by a processor, implement the steps of the method described in any one of the first aspects.

[0015] According to a fifth aspect of the present disclosure, a chip is provided, including a processor and an interface; the processor is configured to read instructions to perform the method described in any one of the first aspects.

[0016] According to a sixth aspect of the present disclosure, a computer program product is provided, including a computer program that, when executed by a processor, implements the steps of the method described in any one of the first aspects.

[0017] According to a seventh aspect of the present disclosure, a battery management system is provided, the system including the vehicle rectifier described in the first aspect and the battery manager described in the third aspect.

[0018] According to an eighth aspect of the present disclosure, a vehicle is provided, the vehicle including the battery management system described in the seventh aspect.

[0019] In summary, this disclosure provides a voltage sampling method, which includes: acquiring the fluctuation frequency of the DC current output by the vehicle rectifier when AC charging a power battery using an AC charging pile, wherein the fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile; adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; and sampling the voltage of the power battery according to the adjusted voltage sampling frequency. This disclosure synchronously adjusts the battery voltage sampling frequency according to the AC grid frequency, making it adaptable to AC charging scenarios with different grid frequencies in different regions. It has a wide applicability, can accurately and timely acquire the instantaneous maximum voltage of the battery, prevents overcharging, and effectively improves battery life and safety performance.

[0020] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form a part of this specification, illustrate embodiments consistent with this disclosure and, together with the description, serve to explain the principles of this disclosure.

[0022] Figure 1a This is a schematic diagram illustrating the voltage fluctuation of a single battery cell and a fixed sampling frequency of the single battery cell voltage according to an exemplary embodiment.

[0023] Figure 1bThis is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0024] Figure 1c This is a schematic diagram illustrating the voltage fluctuation of a single battery cell and the adjusted sampling frequency of the single battery cell voltage according to an exemplary embodiment.

[0025] Figure 2 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0026] Figure 3 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0027] Figure 4 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0028] Figure 5 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0029] Figure 6 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment.

[0030] Figure 7 This is a block diagram illustrating a voltage sampling device according to an exemplary embodiment.

[0031] Figure 8 This is a block diagram illustrating a battery manager according to an exemplary embodiment.

[0032] Figure 9 This is a block diagram illustrating a battery management system according to an exemplary embodiment.

[0033] Figure 10 This is a block diagram illustrating a vehicle according to an exemplary embodiment. Detailed Implementation

[0034] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numerals in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this disclosure. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this disclosure as detailed in the appended claims.

[0035] It should be understood that the term "comprising" and its variations as used herein are open-ended, meaning "including but not limited to". The term "based on" means "at least partially based on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; the term "some embodiments" means "at least some embodiments". Definitions of other terms will be given in the following description.

[0036] It should be noted that the concepts of "first," "second," etc., mentioned in this disclosure are used only to distinguish different devices, modules, or units, and are not used to limit the order of functions performed by these devices, modules, or units or their interdependencies. The modifiers "a" and "a plurality of" mentioned in this disclosure are illustrative rather than restrictive, and those skilled in the art should understand that, unless explicitly stated in the context, they should be understood as "one or more." In the description of this disclosure, unless otherwise stated, "a plurality of" means two or more, and other quantifiers are similar; "at least one," "one or more," or similar expressions refer to any combination of these items, including any combination of single or multiple items.

[0037] Although operations or steps are described in a specific order in the accompanying drawings in the embodiments of this disclosure, it should not be construed as requiring these operations or steps to be performed in the specific order or serial order shown, or requiring all of the shown operations or steps to be performed to obtain the desired result. In the embodiments of this disclosure, these operations or steps may be performed serially; they may be performed in parallel; or a portion of these operations or steps may be performed.

[0038] The names of messages or information exchanged between multiple devices in the embodiments of this disclosure are for illustrative purposes only and are not intended to limit the scope of these messages or information. It is understood that before using the technical solutions disclosed in the embodiments of this disclosure, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this disclosure in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0039] First, the application scenario of this disclosure will be explained. The applicant has discovered that the power battery pack of new energy vehicles is composed of several individual cells connected in series and parallel. The battery management controller needs to collect the voltage of each individual cell to execute the charging and discharging control of the battery pack. During the charging and discharging control process, the battery pack follows the "barrel theory," meaning that during discharging, over-discharge protection is needed based on the cell with the lowest voltage in the battery pack, while during charging, over-charge protection is needed based on the cell with the highest voltage in the battery pack. Over-discharge and over-charge are factors that directly affect the safety and lifespan of the new energy vehicle battery pack. During charging, the battery manager controls the charging current in real time based on the collected highest cell voltage and factors such as battery temperature, ensuring a certain charging speed while preventing overcharging.

[0040] Common charging scenarios for new energy vehicles are divided into DC charging and AC charging. In DC charging, the AC power input from the grid is rectified into DC power by the DC charging station before being output to the vehicle's battery pack for DC charging. In AC charging, the on-board rectifier rectifies the AC power from the grid at the AC charging station into DC power for charging the battery pack. However, due to limitations in size, weight, and cost, on-board rectifiers do not have the same rectification capabilities as DC charging stations. The DC power after rectification still contains a certain frequency of AC component; this current form is called pulsating DC, and its pulsation frequency is directly related to the frequency of the input AC power. The DC power output by the on-board rectifier will fluctuate at a fixed frequency following the input AC power frequency.

[0041] During AC charging, the DC output from the vehicle's AC-to-DC converter is affected by the frequency of the AC input, resulting in fixed-frequency fluctuations. Since the DC output voltage is a fixed value, these fixed-frequency fluctuations mainly manifest as fixed-frequency fluctuations in the output current, ultimately leading to fixed-frequency fluctuations in the voltage of individual battery cells. If the battery manager continues to sample the individual cell voltage at the original fixed frequency, it may fail to capture the instantaneous peak value of the individual cell voltage, causing overcharging and affecting charging safety.

[0042] Figure 1a This is a schematic diagram illustrating the voltage fluctuation of a single battery cell and a fixed sampling frequency of the single battery cell voltage according to an exemplary embodiment. Figure 1a As shown, the battery voltage sampling time point and the peak value of the current waveform cannot correspond, which makes it impossible to collect the instantaneous maximum value of the charging current and voltage, which will bring the risk of overcharging to the battery.

[0043] In view of this, embodiments of this disclosure provide a voltage sampling method, apparatus, storage medium, battery manager, system, chip, computer program product, and vehicle. The battery voltage sampling frequency can be synchronously adjusted according to the AC power grid frequency, adapting to AC charging scenarios with different power grid frequencies in different regions. It has a wide range of applications and can accurately and timely acquire the instantaneous maximum battery voltage, preventing overcharging and effectively improving battery life and safety performance. The present disclosure will be described below with reference to specific embodiments.

[0044] Figure 1b This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. Figure 1b As shown, this disclosure provides a voltage sampling method, which may include the following steps: In step S10, when the power battery is AC charged using an AC charging pile, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile.

[0045] In this step, when the power battery is AC charged using an AC charging pile, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile. For example, the grid frequency of the AC charging pile can be obtained first, and then the conversion ratio parameter can be obtained based on the electrical parameters of the vehicle rectifier. This conversion ratio parameter represents the ratio of the fluctuation frequency to the grid frequency. Then, based on the grid frequency and the conversion ratio parameter, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained.

[0046] In step S20, the voltage sampling frequency of the power battery is adjusted according to the fluctuation frequency of the DC current.

[0047] In this step, the voltage sampling frequency of the power battery is adjusted according to the fluctuation frequency of the DC current. For example, the voltage sampling frequency coefficient of the power battery can be obtained first, which is greater than zero and less than 1. Then, the voltage sampling frequency of the power battery is determined based on the fluctuation frequency of the DC current and the voltage sampling frequency coefficient of the power battery.

[0048] In step S30, the voltage of the power battery is sampled according to the adjusted voltage sampling frequency.

[0049] In this step, the voltage of the power battery is sampled according to the adjusted and determined voltage sampling frequency.

[0050] Figure 1cThis is a schematic diagram illustrating the voltage fluctuation of a single battery cell and the adjusted sampling frequency of the single battery cell voltage according to an exemplary embodiment. Figure 1c As shown, the adjusted voltage sampling frequency can now capture the peak voltage of the current waveform, thus solving the problem of overcharging risk caused by the inability to capture the instantaneous maximum voltage of the charging current.

[0051] In summary, this disclosure provides a voltage sampling method, which includes: acquiring the fluctuation frequency of the DC current output by the vehicle rectifier when AC charging a power battery using an AC charging pile, wherein the fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile; adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; and sampling the voltage of the power battery according to the adjusted voltage sampling frequency. This disclosure synchronously adjusts the battery voltage sampling frequency according to the AC grid frequency, making it adaptable to AC charging scenarios with different grid frequencies in different regions. It has a wide applicability, can accurately and timely acquire the instantaneous maximum voltage of the battery, prevents overcharging, and effectively improves battery life and safety performance.

[0052] Figure 2 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. Figure 2 As shown, obtaining the fluctuation frequency of the DC current output by the vehicle rectifier may include the following steps: In step S101, the grid frequency of the AC charging pile is obtained.

[0053] In this step, the grid frequency f of the AC charging pile is obtained. AC For example, the power grid frequency f AC It can be used for power grid frequencies in different regions or countries.

[0054] In step S102, the conversion frequency ratio parameter is obtained based on the electrical parameters of the vehicle rectifier itself. The conversion frequency ratio parameter represents the ratio of the fluctuation frequency to the grid frequency.

[0055] In this step, the conversion ratio parameter K is obtained based on the electrical parameters of the vehicle rectifier. e The conversion frequency ratio parameter K e The frequency of the DC current output by the vehicle rectifier is related to the grid frequency f. AC The ratio. For example, the conversion frequency ratio parameter K. e You can obtain the information from the product manual of the vehicle rectifier, or you can obtain it through actual measurement.

[0056] In step S103, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained based on the grid frequency and the conversion frequency ratio parameter.

[0057] In this step, based on the grid frequency f AC With conversion frequency ratio parameter K e To obtain the fluctuation frequency f of the DC current output by the vehicle rectifier. DC For example, the fluctuation frequency f of the DC current output by the vehicle rectifier. DC It can be obtained from the following formula: f DC = f AC * K e Formula 1 Figure 3 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. Figure 3 As shown, obtaining the fluctuation frequency of the DC current output by the vehicle rectifier may further include the following steps: In step S104, the fluctuation frequency of the DC current is obtained through the message sent by the vehicle rectifier.

[0058] In this step, the fluctuation frequency f of the DC current can be obtained through the messages sent by the on-board rectifier. DC For example, the fluctuation frequency f of the direct current. DC Alternatively, it can be obtained from the vehicle rectifier, and then sent to the battery manager in the form of a message by the vehicle rectifier. The message sent by the vehicle rectifier can be a CAN message or a message of other format standards. This disclosure does not impose any restrictions on this.

[0059] Figure 4 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. Figure 4 As shown, adjusting the voltage sampling frequency of the power battery based on the fluctuation frequency of the DC current may include the following steps: In step S201, the voltage sampling frequency coefficient of the power battery is obtained, wherein the voltage sampling frequency coefficient is greater than zero and less than 1.

[0060] In this step, the voltage sampling frequency coefficient K of the power battery is obtained. x The voltage sampling frequency coefficient K x Greater than zero and less than 1. For example, the voltage sampling frequency coefficient K... x It can be empirical data or manually calibrated data; for example, in this embodiment, it can be set to 0.8.

[0061] In step S202, the voltage sampling frequency of the power battery is determined based on the fluctuation frequency and the coefficient.

[0062] In this step, based on the fluctuation frequency f DC With coefficient K x The voltage sampling frequency fc of the power battery is determined. For example, the voltage sampling frequency fc of the power battery can be obtained by the following formula: fc = f DC * K x Formula 2 Figure 5 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. Figure 5 As shown, the method may further include the following steps: In step S40, when the power battery is not charged, the voltage of the power battery is sampled using a preset fixed sampling frequency to obtain the static and / or dynamic voltage of the power battery.

[0063] In this step, when the power battery is not charged, a preset fixed sampling frequency f is used. cell Voltage sampling is performed on the power battery to obtain its static and / or dynamic voltages. The static voltage is the voltage of the power battery when it is not in use, such as during standby or parking; the dynamic voltage is the voltage of the power battery when it is in use, such as during driving or heating.

[0064] Figure 6 This is a flowchart illustrating a voltage sampling method according to an exemplary embodiment. The power battery may include a power battery pack, such as... Figure 6 As shown, the method may further include the following steps: In step S50, the voltage of each power battery in the power battery pack is sampled according to the adjusted voltage sampling frequency, and charging is stopped if the voltage of any power battery is greater than a set threshold.

[0065] In this step, the voltage of each battery in the power battery pack is sampled according to the adjusted voltage sampling frequency, and charging is stopped if the voltage of any battery exceeds a set threshold. The set threshold can be the highest withstand voltage of the smallest capacity battery in the power battery pack. This prevents overcharging of any single battery in the power battery pack, thus protecting the entire power battery pack.

[0066] In summary, this disclosure provides a voltage sampling method, which includes: acquiring the fluctuation frequency of the DC current output by the vehicle rectifier when AC charging a power battery using an AC charging pile, wherein the fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile; adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; and sampling the voltage of the power battery according to the adjusted voltage sampling frequency. This disclosure synchronously adjusts the battery voltage sampling frequency according to the AC grid frequency, making it adaptable to AC charging scenarios with different grid frequencies in different regions. It has a wide applicability, can accurately and timely acquire the instantaneous maximum voltage of the battery, prevents overcharging, and effectively improves battery life and safety performance.

[0067] Figure 7 This is a block diagram illustrating a voltage sampling device according to an exemplary embodiment. Figure 7 As shown, this disclosure provides a voltage sampling device 700, which may include the following modules: The acquisition module 710 is configured to acquire the fluctuation frequency of the DC current output by the vehicle rectifier when the power battery is AC charged using an AC charging pile. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile.

[0068] The adjustment module 720 is configured to adjust the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current.

[0069] The sampling module 730 is configured to sample the voltage of the power battery according to the adjusted voltage sampling frequency.

[0070] Optionally, the adjustment module 720 is further configured to: Obtain the grid frequency of the AC charging pile; Based on the electrical parameters of the on-board rectifier, the conversion frequency ratio parameter is obtained, which represents the ratio of the fluctuation frequency to the grid frequency. The fluctuation frequency of the DC current output by the vehicle rectifier is obtained based on the grid frequency and the conversion frequency ratio parameter.

[0071] Optionally, the adjustment module 720 is further configured to: The fluctuation frequency of the DC current is obtained through the message sent by the vehicle-mounted rectifier.

[0072] Optionally, the adjustment module 720 is further configured to: Obtain the voltage sampling frequency coefficient of the power battery, wherein the voltage sampling frequency coefficient is greater than zero and less than 1; The voltage sampling frequency of the power battery is determined based on the fluctuation frequency and the coefficient.

[0073] Optionally, the adjustment module 720 is further configured to: When the power battery is not charged, the voltage of the power battery is sampled at a preset fixed sampling frequency to obtain the static and / or dynamic voltage of the power battery.

[0074] Regarding the apparatus in the above embodiments, the specific manner in which each module performs its operation has been described in detail in the embodiments related to the method, and will not be elaborated upon here.

[0075] In summary, this disclosure provides a voltage sampling device, comprising: an acquisition module configured to acquire the fluctuation frequency of the DC current output by the vehicle rectifier when the power battery is AC charged using an AC charging pile, wherein the fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile; an adjustment module configured to adjust the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; and a sampling module configured to sample the voltage of the power battery according to the adjusted voltage sampling frequency. This disclosure synchronously adjusts the battery voltage sampling frequency according to the AC grid frequency, adapting to AC charging scenarios with different grid frequencies in different regions. It has a wide applicability range and can accurately and timely acquire the instantaneous maximum voltage of the battery, preventing overcharging and effectively improving battery life and safety performance.

[0076] This disclosure also provides a computer-readable storage medium having stored thereon computer program instructions that, when executed by a processor, implement the steps of the voltage sampling method provided in this disclosure.

[0077] Figure 8 This is a block diagram illustrating a battery manager according to an exemplary embodiment. (Refer to...) Figure 8 The battery manager 800 may include one or more of the following components: a processing component 802, a memory 804, a power supply component 806, a multimedia component 808, an audio component 810, an input / output interface 812, a sensor component 814, and a communication component 816.

[0078] Processing component 802 typically controls the overall operation of battery manager 800, such as operations associated with display, telephone calls, data communication, camera operation, and recording. Processing component 802 may include one or more processors 820 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 802 may include one or more modules to facilitate interaction between processing component 802 and other components. For example, processing component 802 may include a multimedia module to facilitate interaction between multimedia component 808 and processing component 802.

[0079] Memory 804 is configured to store various types of data to support the operation of Battery Manager 800. Examples of this data include instructions for any application or method operating on Battery Manager 800, contact data, phonebook data, messages, pictures, videos, etc. Memory 804 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as Static Random Access Memory (SRAM), Electrically Erasable Programmable Read-Only Memory (EEPROM), Erasable Programmable Read-Only Memory (EPROM), Programmable Read-Only Memory (PROM), Read-Only Memory (ROM), Magnetic Storage, Flash Memory, Disk, or Optical Disk.

[0080] Power supply component 806 provides power to various components of battery manager 800. Power supply component 806 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to battery manager 800.

[0081] The multimedia component 808 includes a screen that provides an output interface between the battery manager 800 and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 808 includes a front-facing camera and / or a rear-facing camera. When the battery manager 800 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0082] Audio component 810 is configured to output and / or input audio signals. For example, audio component 810 includes a microphone (MIC) configured to receive external audio signals when battery manager 800 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 804 or transmitted via communication component 816. In some embodiments, audio component 810 also includes a speaker for outputting audio signals.

[0083] Input / output interface 812 provides an interface between processing component 802 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0084] Sensor assembly 814 includes one or more sensors for providing state assessments of various aspects of the battery manager 800. For example, sensor assembly 814 may detect the on / off state of the battery manager 800, the relative positioning of components such as the display and keypad of the battery manager 800, changes in the position of the battery manager 800 or one of its components, the presence or absence of user contact with the battery manager 800, the orientation or acceleration / deceleration of the battery manager 800, and temperature changes of the battery manager 800. Sensor assembly 814 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 814 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 814 may also include an accelerometer, a gyroscope, a magnetometer, a pressure sensor, or a temperature sensor.

[0085] The communication component 816 is configured to facilitate wired or wireless communication between the battery manager 800 and other devices. The battery manager 800 can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, the communication component 816 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, the communication component 816 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0086] In an exemplary embodiment, the battery manager 800 may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0087] In an exemplary embodiment, a non-transitory computer-readable storage medium including instructions is also provided, such as a memory 804 including instructions that can be executed by a processor 820 of a battery manager 800 to perform the above-described method. For example, the non-transitory computer-readable storage medium may be a ROM, random access memory (RAM), CD-ROM, magnetic tape, floppy disk, or optical data storage device, etc.

[0088] The aforementioned device can be a standalone electronic device or a part of a standalone electronic device. For example, in one embodiment, the device can be an integrated circuit (IC) or a chip, wherein the integrated circuit can be a single IC or a collection of multiple ICs; the chip can include, but is not limited to, the following types: GPU (Graphics Processing Unit), CPU (Central Processing Unit), FPGA (Field Programmable Gate Array), DSP (Digital Signal Processor), ASIC (Application Specific Integrated Circuit), SOC (System on Chip), etc. The aforementioned integrated circuit or chip can be used to execute executable instructions (or code) to implement the voltage sampling method described above. The executable instructions can be stored in the integrated circuit or chip or obtained from other devices or equipment. For example, the integrated circuit or chip includes a processor, memory, and an interface for communicating with other devices. The executable instruction can be stored in the memory, and when the executable instruction is executed by the processor, it implements the voltage sampling method described above; or, the integrated circuit or chip can receive the executable instruction through the interface and transmit it to the processor for execution to implement the voltage sampling method described above.

[0089] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the voltage sampling method described above when executed by the programmable device.

[0090] Figure 9 This is a block diagram illustrating a battery management system according to an exemplary embodiment. Figure 9 As shown, this disclosure provides a battery management system 900, which may include the vehicle rectifier described in the above embodiments and the battery manager 800 described in the above embodiments.

[0091] Figure 10 This is a block diagram illustrating a vehicle according to an exemplary embodiment. (Refer to...) Figure 10 The vehicle 1000 may include a domain controller 1000 and various subsystems, such as an infotainment system 1010, a perception system 1020, a decision control system 1030, a drive system 1040, and a computing platform 1050. The vehicle 1000 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the vehicle 1000 can be interconnected via wired or wireless means.

[0092] In some embodiments, the infotainment system 1010 may include a communication system, an entertainment system, and a navigation system, etc.

[0093] The perception system 1020 may include several types of sensors for sensing information about the environment surrounding the vehicle 1000. For example, the perception system 1020 may include a global positioning system (which may be a GPS system, a BeiDou system, or another positioning system), an inertial measurement unit (IMU), a lidar, a millimeter-wave radar, an ultrasonic radar, and a camera device.

[0094] The decision control system 1030 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0095] The drive system 1040 may include components that provide powered motion to the vehicle 1000. In one embodiment, the drive system 1040 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

[0096] Some or all of the functions of the vehicle 1000 are controlled by a computing platform 1050. The computing platform 1050 may include at least one processor 1051 and a memory 1052, the processor 1051 being able to execute instructions 1053 stored in the memory 1052.

[0097] The processor 1051 can be any conventional processor, such as a commercially available CPU. The processor may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems on chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0098] The memory 1052 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk or optical disk.

[0099] In addition to instruction 1053, memory 1052 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 1052 can be used by computing platform 1050.

[0100] In this embodiment of the disclosure, processor 1051 may execute instruction 1053 to complete all or part of the steps of the voltage sampling method described above.

[0101] In another exemplary embodiment, a computer program product is also provided, which includes a computer program executable by a programmable device, the computer program having a code portion for performing the voltage sampling method described above when executed by the programmable device.

[0102] Other embodiments of this disclosure will readily occur to those skilled in the art upon consideration of the specification and practice of this disclosure. This application is intended to cover any variations, uses, or adaptations of this disclosure that follow the general principles of this disclosure and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of this disclosure are indicated by the following claims.

[0103] It should be understood that this disclosure is not limited to the precise structures described above and shown in the accompanying drawings, and various modifications and changes can be made without departing from its scope. The scope of this disclosure is limited only by the appended claims.

Claims

1. A voltage sampling method, characterized in that, The method includes: When using an AC charging pile to AC charge a power battery, the fluctuation frequency of the DC current output by the vehicle rectifier is obtained. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile. The voltage sampling frequency of the power battery is adjusted according to the fluctuation frequency of the DC current. The voltage of the power battery is sampled according to the adjusted voltage sampling frequency.

2. The method according to claim 1, characterized in that, The acquisition of the fluctuation frequency of the DC current output by the vehicle rectifier includes: Obtain the grid frequency of the AC charging pile; Based on the electrical parameters of the on-board rectifier, the conversion frequency ratio parameter is obtained, which represents the ratio of the fluctuation frequency to the grid frequency. The fluctuation frequency of the DC current output by the vehicle rectifier is obtained based on the grid frequency and the conversion frequency ratio parameter.

3. The method according to claim 1, characterized in that, The method of obtaining the fluctuation frequency of the DC current output by the vehicle rectifier also includes: The fluctuation frequency of the DC current is obtained through the message sent by the vehicle-mounted rectifier.

4. The method according to claim 1, characterized in that, The step of adjusting the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current includes: Obtain the voltage sampling frequency coefficient of the power battery, wherein the voltage sampling frequency coefficient is greater than zero and less than 1; The voltage sampling frequency of the power battery is determined based on the fluctuation frequency and the coefficient.

5. The method according to claim 1, characterized in that, The method further includes: When the power battery is not charged, the voltage of the power battery is sampled at a preset fixed sampling frequency to obtain the static and / or dynamic voltage of the power battery.

6. The method according to any one of claims 1 to 4, characterized in that, The power battery includes a power battery pack, and the method further includes: The voltage of each power battery in the power battery pack is sampled according to the adjusted voltage sampling frequency, and charging is stopped when the voltage of any power battery exceeds a set threshold.

7. A voltage sampling device, characterized in that, include: The acquisition module is configured to acquire the fluctuation frequency of the DC current output by the vehicle rectifier when the power battery is AC charged using an AC charging pile. The fluctuation frequency is the frequency of the AC component in the DC current and is related to the grid frequency of the AC charging pile. The adjustment module is configured to adjust the voltage sampling frequency of the power battery according to the fluctuation frequency of the DC current; The sampling module is configured to sample the voltage of the power battery according to the adjusted voltage sampling frequency.

8. A battery manager, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured to execute the executable instructions to implement the method of any one of claims 1 to 6.

9. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When the program instructions are executed by the processor, they implement the steps of the method according to any one of claims 1 to 6.

10. A chip, characterized in that, It includes a processor and an interface; the processor is used to read instructions to execute the method of any one of claims 1 to 6.

11. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 6.

12. A battery management system, characterized in that, The system includes the vehicle rectifier of claim 3 and the battery manager of claim 8.

13. A vehicle, characterized in that, The vehicle includes the battery management system of claim 12.

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