Battery, voltage sampling method, and electric apparatus

Abstract

Disclosed in the present application are a battery, a voltage sampling method, and an electric apparatus. The battery comprises a housing, a communication system and a voltage sampling system, wherein the communication system is connected to the housing; the voltage sampling system is connected to the housing; and a controller is respectively connected to the communication system and the voltage sampling system, and is used for controlling a communication timing sequence of the communication system and a sampling timing sequence of the sampling system to be arranged at intervals. By means of the solution, voltage data obtained by means of sampling can be more accurate.

Description

Battery, voltage sampling method and power-consuming device

[0001]

Cross-reference

[0002] This application claims priority to the Chinese patent application filed with the China Patent Office on November 1, 2023, with application number 2023114467070 and application name “Battery, voltage sampling method and electrical device”, the entire contents of which are incorporated by reference into this application.

Technical field

[0003] The present application relates to the field of battery technology, and in particular to a battery, a voltage sampling method, and an electrical device. [Background Technology]

[0004] With the improvement of living standards, people are increasingly using various batteries in their daily lives, such as power batteries, which are core components of electric vehicles. The voltage or temperature at the battery terminals, as well as other data, may reflect the battery's health status. However, the current method for collecting the voltage at the battery terminals is generally to install a voltage sampling system in the power consumption device and connect the battery to the voltage sampling system to obtain the voltage at the battery terminals. This method has problems, including requiring the power consumption device to be equipped with a voltage sampling system to collect the voltage at the battery terminals. Some power consumption devices may not have a voltage sampling system, making it impossible to collect the voltage at the battery terminals.

[0005] [Summary of the invention]

[0006] The present application provides at least one battery, a voltage sampling method, and an electrical device.

[0007] The present application provides a battery, which includes: a shell, a communication system, a voltage sampling system and a controller; the communication system is connected to the shell; the voltage sampling system is connected to the shell; the controller is connected to the communication system and the voltage sampling system respectively, and is used to control the communication timing of the communication system and the sampling timing interval setting of the voltage sampling system.

[0008] In the above scheme, a voltage sampling system is set on the battery to facilitate the voltage sampling system to sample the battery voltage, and a communication system is set on the battery to facilitate the communication between the battery and the controllers of other devices or electrical devices, such as transmitting the collected voltage to the controllers of other devices or electrical devices. The differential signal used by the communication system in the battery in the process of sending data is likely to interfere with the voltage sampling. Therefore, in this scheme, the controller in the battery controls the communication timing of the communication system and the sampling timing interval setting of the sampling system, which can reduce the overlapping time of the communication system sending data and the voltage sampling system performing voltage sampling, thereby improving the accuracy of the voltage data obtained by voltage sampling.

[0009] In some embodiments, the housing includes a shell having an opening and an end cover, and the communication system, the voltage sampling system, and the controller are connected to the end cover.

[0010] In the above solution, by connecting the communication system, voltage sampling system and controller to the end cover respectively, the communication system, voltage sampling system and controller can be easily removed from the battery for routine maintenance or repair operations.

[0011] In some embodiments, the communication system, the voltage sampling system, and the controller are arranged on a side of the end cover facing the housing.

[0012] In the above solution, by arranging the voltage sampling system on the side of the end cap facing the shell, that is, arranging it inside the battery, it is more convenient to carry than arranging it on the outside of the battery and can reduce interference from external factors during the voltage sampling process, thereby improving the accuracy of the sampled voltage data. In addition, the communication system and the controller are also arranged on the side of the end cap facing the shell, which facilitates the interaction between the controller and the communication system and the voltage sampling system.

[0013] In some embodiments, the communication system, the voltage sampling system, and the controller are integrated on a single chip.

[0014] In the above solution, by integrating the communication system, the voltage sampling system and the controller on a single chip, the space occupied by the discrete chips can be reduced, thereby achieving the effect of relatively reducing the volume of the battery.

[0015] The present application provides a voltage sampling method, which is applied to any of the above-mentioned batteries. The voltage sampling method includes: obtaining the communication timing of the communication system in the battery and the sampling timing of the voltage sampling system; adjusting at least one of the communication timing and the sampling timing so as to set the interval between the communication timing and the sampling timing; and sampling the voltage at both ends of the battery according to the current sampling timing to obtain voltage data.

[0016] In the above scheme, by obtaining the communication timing of the communication system in the battery and the sampling timing of the voltage sampling system, adjusting the communication timing or the sampling timing, or adjusting the communication timing and the sampling timing at the same time, the communication timing and the sampling timing are set at an interval, thereby reducing the interference of the communication system on the voltage sampling when sending data, thereby improving the accuracy of the voltage data obtained by sampling.

[0017] In some embodiments, adjusting at least one of the communication timing and the sampling timing includes: adjusting the other timing based on one of the communication timing and the sampling timing as a reference timing.

[0018] In the above solution, by adjusting one of the timings based on the other timing, compared with adjusting the two timings at the same time, this solution is simpler.

[0019] In some embodiments, the communication timing is a reference timing, and the sampling timing includes a sampling time node. One of the communication timing and the sampling timing is used as the reference timing, and the other timing is adjusted to obtain the target timing, including: obtaining the protection interval duration between adjacent frames in the communication timing; and determining the sampling time node of the voltage sampling system in the battery according to the protection interval duration.

[0020] In the above scheme, the length of the protection interval between adjacent frames in the communication sequence is obtained, and the sampling time of the voltage sampling circuit in the battery is determined by the protection interval length. Compared with not referring to the protection interval length, this scheme can reduce the impact of the communication system sending data frames on the voltage sampling circuit when collecting voltage, thereby improving the accuracy of the sampled voltage data.

[0021] In some embodiments, the sampling time node includes a sampling start time node, and determining the sampling time node of the voltage sampling system in the battery according to the protection interval duration includes: obtaining the time required for a single sampling of the voltage sampling system; and determining the sampling start time node of the single sampling based on the time required for the single sampling and the protection interval duration.

[0022] In the above scheme, the sampling start time node is determined by referring to the time required for a single sampling of the voltage sampling system. Compared with randomly determining the sampling start time node, the overlap time between the sampling process and the data frame sending process can be reduced, thereby improving the accuracy of voltage sampling.

[0023] In some embodiments, obtaining the time required for a single sampling of the voltage sampling system includes obtaining the sum of a response time of the voltage sampling system and a single sampling duration as the time required for the single sampling.

[0024] In the above scheme, by combining the response time of the voltage sampling system and the duration of a single sampling, and comprehensively considering the time required for a single voltage sampling, the sampling start time node of the single sampling can be better set, reducing the time when the data transmission process and the voltage sampling process overlap.

[0025] In some embodiments, based on the time required for a single sampling and the protection interval time, a sampling start time node of a single sampling is determined, including: in response to the time required for a single sampling being greater than or equal to the protection interval time, determining a first sampling start time node of the single sampling; or, in response to the time required for a single sampling being less than the protection interval time, determining a second sampling start time node of the single sampling; wherein the time interval between the first sampling start time node and the center point of the protection interval time is greater than the time interval between the second sampling start time node and the center point of the protection interval time.

[0026] In the above scheme, if the time required for a single sampling is greater than or equal to the protection interval duration, then in order to ensure that fewer sampling time nodes coincide with the time of sending data frames, the sampling circuit can be controlled to perform sampling earlier, that is, the coincidence time between the response time and the sending data frame is increased, thereby reducing the coincidence time between the single sampling duration and the sending data frame. If the time required for a single sampling is less than the protection interval duration, the coincidence time between the response time and the sending data frame can be further reduced, that is, the time interval between the first sampling time node and the center point of the protection interval duration is greater than the time interval between the second sampling start time node and the center point of the protection interval duration.

[0027] In some embodiments, in response to the duration required for a single sampling being greater than or equal to the protection interval duration, determining the first sampling start time node of the single sampling includes: aligning the center point of the single sampling duration with the center point of the protection interval duration to obtain the first sampling start time node; or, in response to the duration required for a single sampling being less than the protection interval duration, determining the second sampling start time node of the single sampling includes: aligning the center point of the duration required for the single sampling with the center point of the protection interval duration to obtain the second sampling start time node.

[0028] In the above scheme, if the duration required for a single sampling is greater than or equal to the protection interval duration, then the single sampling duration can be guaranteed to be within the protection interval as much as possible, and the center point of the single sampling duration can be aligned with the center point of the protection interval duration to determine the first sampling start time node, or if the duration required for a single sampling is less than the protection interval duration, then by aligning the center point of the single sampling duration with the center point of the protection interval duration, the overlap time between the response time and the sending data frame can be further reduced.

[0029] In some embodiments, the method further includes: determining a start time node and an end time node of a protection interval between adjacent frames in the communication system; and determining a duration of the protection interval based on the start time node and the end time node of the protection interval.

[0030] In the above scheme, by obtaining the start time node and end time node of the protection interval between each adjacent frame in the communication system, the protection interval duration can be obtained. By obtaining the start time node and end time node of the protection interval, it is convenient to control the voltage sampling circuit according to the start time node of the protection interval and the sampling start time node of the single sampling, and determine the sampling start time node of the single sampling in timing.

[0031] In some embodiments, determining the start time node and the end time node of the protection interval between adjacent frames in a communication system includes: synchronizing the clock of a voltage sampling circuit with the clock of the communication system; and determining the start time node and the end time node based on the synchronized clock of the communication system.

[0032] In the above solution, by synchronizing the clock of the voltage sampling circuit with the clock of the communication system, it is convenient to subsequently determine the length of the protection interval based on the synchronized clock of the communication system.

[0033] In some embodiments, the method further includes: performing data processing on the voltage data sampled at multiple moments to obtain processed voltage data, the data processing including digital filtering and / or smoothing; and sending the processed voltage data to a preset recipient.

[0034] In the above solution, by performing data processing such as digital filtering and smoothing on the sampled voltage data, a subsequent preset receiver can perform corresponding processing based on more accurate voltage data.

[0035] The present application provides an electrical device, which includes the above-mentioned battery.

[0036] In the above scheme, a voltage sampling system is set on the battery to facilitate the voltage sampling system to sample the battery voltage, and a communication system is set on the battery to facilitate the communication between the battery and the controllers of other devices or electrical devices, such as transmitting the collected voltage to the controllers of other devices or electrical devices. The differential signal used by the communication system in the battery in the process of sending data is likely to interfere with the voltage sampling. Therefore, in this scheme, the controller in the battery controls the communication timing of the communication system and the sampling timing interval setting of the sampling system, which can reduce the overlapping time of the communication system sending data and the voltage sampling system performing voltage sampling, thereby improving the accuracy of the voltage data obtained by voltage sampling.

[0037] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present application.

Brief Description of the Drawings

[0038] The drawings herein are incorporated into and constitute a part of the specification. These drawings illustrate embodiments consistent with the present application and, together with the specification, are used to illustrate the technical solutions of the present application.

[0039] FIG1 is a schematic structural diagram of a vehicle provided by some embodiments;

[0040] FIG2 is a schematic diagram of a sub-process for determining a sampling time node according to some embodiments;

[0041] FIG3 is a schematic structural diagram of a battery provided in some embodiments;

[0042] FIG4 is a flow chart of an embodiment of a voltage sampling method provided by some embodiments;

[0043] FIG5 is a schematic diagram of the structure of a communication system data frame provided by some embodiments. [Specific implementation method]

[0044] The following describes the embodiments of the present application in detail with reference to the accompanying drawings.

[0045] In the following description, for the purpose of explanation rather than limitation, specific details such as specific subsystem structures, interfaces, and technologies are provided to facilitate a thorough understanding of the present application.

[0046] The term "and / or" in this article is simply a description of the association relationship of associated objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects are in an "or" relationship. In addition, "many" in this article means two or more than two. In addition, the term "at least one" in this article means any combination of at least two of any one or more of a plurality of. For example, including at least one of A, B, and C can mean including any one or more elements selected from the set consisting of A, B, and C.

[0047] Considering that some electrical devices may not have a voltage sampling system, in order to improve battery monitoring in various scenarios, this solution proposes a battery with a voltage sampling system. The battery itself can sample the voltage at both ends, thereby reducing the requirements for the electrical device. In addition, considering the problem of how to transmit the voltage data collected by the voltage sampling system to the electrical device or other equipment, the battery provided by this solution also includes a communication system and a controller. The controller is connected to the voltage sampling system and the communication system respectively, and can control the voltage sampling system to collect the voltage between the positive and negative poles of the battery, and can also control the communication system to send and receive (receive and / or send) data, thereby sending the collected voltage data to the electrical device or other equipment.

[0048] Furthermore, voltage sampling systems often utilize an ADC (Analog to Digital Converter), primarily used to digitally acquire analog signals for data processing. To facilitate the use and processing of information, the analog quantity must be converted to a digital quantity and transmitted to a microcontroller or microprocessor. Currently, nearly all analog signal sampling systems on the market ultimately digitize the analog quantity as a voltage and record it. Given the close proximity between the communication system within the battery and the voltage sampling system, most existing wired and wireless communication systems utilize differential transmission before entering the PA (power amplifier). This differential transmission typically involves a voltage signal with an amplitude typically ranging from a few volts to tens of volts. This significantly impacts ADC voltage sampling, and no matter how well the conditioning circuitry at the front end of the analog-to-digital conversion module filters, it is difficult to eliminate this impact.

[0049] In order to reduce the impact of the communication system on the voltage collected by the voltage sampling circuit during the process of sending data frames, this solution further provides a voltage sampling method. By obtaining the communication timing of the communication system and the sampling timing of the voltage sampling system, the communication timing and / or sampling timing are adjusted so that the communication timing and the sampling timing are set at an interval. The goal of the interval setting is to reduce the overlap time between the communication system sending data frames and the voltage sampling system performing voltage sampling, so that the sampled voltage data is more accurate.

[0050] The electric device disclosed in the embodiments of the present application can be used in electric devices that use batteries as power sources or various energy storage systems that use batteries as energy storage elements. The electric device can be a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, and the like, and the spacecraft can include airplanes, rockets, space shuttles, and spacecraft, and the like.

[0051] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0052] Referring to Figure 1, the vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery 100 is provided inside the vehicle 1000. The battery 100 can be provided at the bottom, head or tail of the vehicle 1000. The battery 100 can be used to power the vehicle 1000. For example, the battery 100 can serve as an operating power source for the vehicle 1000. The vehicle 1000 can also include a vehicle controller 200 and a motor 300. The vehicle controller 200 is used to control the battery 100 to power the motor 300, for example, for starting, navigating and meeting the power requirements of the vehicle 1000 during operation.

[0053] In some embodiments of the present application, the battery 100 can serve not only as an operating power source for the vehicle 1000, but also as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0054] Referring to FIG. 2 , the present application provides a battery 100 . The battery includes a housing 110 , a communication system 120 , a voltage sampling system 130 , and a controller 140 . The communication system 120 is connected to the housing 110 . The voltage sampling system 130 is connected to the housing 110 . The controller 140 is connected to the communication system 120 and the voltage sampling system 130 , respectively, to control the communication timing of the communication system 120 and the sampling interval setting of the voltage sampling system 130 .

[0055] The battery 100 provided in this solution may be a single battery cell, or a battery module or battery assembly comprising a single battery cell and a housing for accommodating the single battery cell. This solution uses the battery 100 as an example. A single battery cell may be a secondary battery or a primary battery. It may also be a lithium-sulfur battery, a sodium-ion battery 100, or a magnesium-ion battery 100, but is not limited thereto. A single battery cell may be cylindrical, flat, rectangular, or in other shapes. A single battery cell refers to the smallest unit that makes up the battery 100. The voltage sampling system 130 may be connected to the positive and negative electrodes of the battery 100 to sample the voltage across the battery 100. Any system capable of sampling the voltage across the battery 100 is considered the voltage sampling system 130 provided in this solution, and the specific structure of the voltage sampling system 130 is not limited in this embodiment. The controller 140 may be any device or circuit with control functionality, such as a microcontroller (MCU), a system-on-chip (SOC), or a single-chip microcomputer. The controller 140 and the vehicle controller 200 described above may be the same controller or different controllers. In some embodiments, the controller 140 is further configured to control the voltage sampling system 130 to sample the voltage across the battery 100 according to a sampling sequence. In some embodiments, the controller 140 is further configured to control the communication system 120 to send or receive data. The communication system 120 can be any system with communication functionality, such as a carrier communication system 120 or an infrared communication system 120, capable of sending and receiving data. Optionally, the housing can include an end cap 111 and a housing 112, with the end cap 111 covering an opening in the housing 112. The connection to the housing can be to the end cap 111 or to the housing 112. The connection to the housing 112 can be located inside or outside the housing 112. The controller 140 can control the communication timing and sampling interval setting of the communication system 120 by adjusting at least one of the communication timing and the sampling timing to facilitate setting the communication timing and the sampling interval. Exemplarily, the communication timing or the sampling timing can be adjusted, or both can be adjusted simultaneously, so that the communication timing and the sampling timing are set at an interval. The interval setting can be understood as there being no overlap between the communication system 120 sending data and the voltage sampling system 130 performing voltage sampling. For example, voltage sampling is not performed during the data transmission process in the communication timing. Alternatively, the interval setting can be understood as the overlap between the communication system 120 sending data and the voltage sampling system 130 performing voltage sampling is less than or equal to a overlap time threshold. In other embodiments, the interval setting can also be understood in other reasonable ways, which are not specifically limited here.

[0056] In the above scheme, a voltage sampling system 130 is provided on the battery 100 to facilitate the voltage sampling system 130 to sample the voltage of the battery 100, and a communication system 120 is provided on the battery 100 to facilitate the communication between the battery 100 and the controller 140 of other devices or electrical devices, for example, the collected voltage is transmitted to the controller 140 of other devices or electrical devices. The differential signal used by the communication system 120 in the battery 100 in the process of sending data is likely to interfere with the voltage sampling. Therefore, in this scheme, the controller 140 in the battery 100 controls the communication timing of the communication system 120 and the sampling timing interval setting of the sampling system, which can reduce the overlap time between the time when the communication system 120 sends data and the time when the voltage sampling system 130 performs voltage sampling, thereby improving the accuracy of the voltage data obtained by voltage sampling.

[0057] In some embodiments, the housing includes a shell 112 having an opening and an end cover 111 , and the communication system 120 , the voltage sampling system 130 , and the controller 140 are connected to the end cover 111 .

[0058] The end cap 111 can be installed on the opening of the housing 112. The connection to the end cap 111 can be installed on the side of the end cap 111 facing the housing 112 or on the side of the end cap 111 away from the housing 112. The communication system 120, the voltage sampling system 130, and the controller 140 can be installed on the same side of the end cap 111 or on different sides.

[0059] In the above solution, by connecting the communication system 120, the voltage sampling system 130 and the controller 140 to the end cover 111 respectively, the communication system 120, the voltage sampling system 130 and the controller 140 can be conveniently removed from the battery 100 for routine maintenance or repair operations.

[0060] In some embodiments, the communication system 120 , the voltage sampling system 130 , and the controller 140 are disposed on a side of the end cover 111 facing the housing 112 .

[0061] The communication system 120 can be a carrier communication system. The communication system 120 is connected to the positive and negative electrodes of the battery 100, specifically, the positive and negative electrodes of the battery 100. After the positive and negative electrodes of the battery 100 are connected to an external device, the external device, the positive electrode, the communication system 120, and the negative electrode form a communication loop, facilitating the transmission of data to and reception of data from the external device.

[0062] In the above solution, by arranging the voltage sampling system 130 on the side of the end cap 111 facing the shell 112, that is, arranging it inside the battery 100, it is more convenient to carry than being arranged on the outside of the battery 100 and can reduce interference from external factors during the voltage sampling process, thereby improving the accuracy of the sampled voltage data. In addition, the communication system 120 and the controller 140 are also arranged on the side of the end cap 111 facing the shell 112, which facilitates the interaction between the controller 140 and the communication system 120 and the voltage sampling system 130.

[0063] In some embodiments, the communication system 120 , the voltage sampling system 130 , and the controller 140 are integrated into a chip 150 .

[0064] Exemplarily, the chip 150 may be LH100 or another type of chip 150. The type of chip 150 is not specifically limited herein. The power interface of the chip 150 is connected to the positive and negative electrodes of the battery 100 respectively, so that the battery 100 supplies power to the chip 150.

[0065] In the above solution, by integrating the communication system 120 , the voltage sampling system 130 and the controller 140 into one chip 150 , the space occupied by the discrete chip 150 can be reduced, thereby achieving the effect of relatively reducing the volume of the battery 100 .

[0066] Referring to FIG. 3 , the voltage sampling method provided herein is applicable to any of the aforementioned batteries and includes steps S11 through S13. Step S11: Obtaining the communication timing of the battery's communication system and the sampling timing of the voltage sampling system. Step S12: Adjusting at least one of the communication timing and the sampling timing to ensure that the communication timing and the sampling timing are spaced apart. Step S13: Sampling the voltage across the battery according to the current sampling timing to obtain voltage data.

[0067] As described above, the battery is provided with a communication system and a voltage sampling system. The communication system and the voltage sampling system can be integrated on a chip. The voltage sampling method provided in this application can be executed by a controller in the battery, specifically, a microcontroller or microprocessor integrated on the chip. The communication timing can be understood as the pattern followed by the communication system in transmitting data. For example, the communication system may transmit 50 data frames per second, with the time interval between adjacent data frames being the same. The sampling timing can be understood as the pattern followed by the voltage sampling system in performing voltage sampling. For example, the voltage is sampled every n seconds, with each voltage sampling taking m seconds. Adjusting at least one of the communication timing and the sampling timing can be done by adjusting the communication timing alone, the sampling timing alone, or both. Adjusting the communication timing can be done by adjusting the communication frequency and / or the communication start time. The communication frequency can be specifically understood as the number of communications per unit time. Adjusting the communication frequency can be done by increasing or decreasing the number of data frames transmitted per unit time. The communication start time can be understood as the start sending time of the next frame or the first frame data frame. Adjusting the communication start time can be to advance or postpone the start sending time of the next frame or the first frame data frame, so that other frames after the frame are advanced or postponed in sequence. The way to adjust the sampling timing can be to adjust the sampling frequency, the sampling start time and / or the single sampling duration. The sampling frequency can be understood as the number of samples per unit time, the sampling start time can be understood as the start time of the first sampling or the next sampling, and the single sampling duration can be the length of time between the start time and the end time of the single sampling. Adjusting the number of samples can be to increase or decrease the number of samples per unit time, and adjusting the single sampling duration can be to increase or shorten the single sampling duration. Adjusting the sampling start time can be to advance or postpone the start time of the first sampling or the next sampling. The interval setting can be understood as there being no overlapping time between the communication system sending data and the voltage sampling system performing voltage sampling. For example, voltage sampling is not performed during the process of sending data in the communication sequence. Alternatively, the interval setting can also be understood as the overlapping time between the communication system sending data and the voltage sampling system performing voltage sampling is less than or equal to the overlapping time threshold. In other embodiments, the interval setting can also be understood in other reasonable ways, which are not specifically limited here.

[0068] In the above scheme, by obtaining the communication timing of the communication system in the battery and the sampling timing of the voltage sampling system, adjusting the communication timing or the sampling timing, or adjusting the communication timing and the sampling timing at the same time, the communication timing and the sampling timing are set at an interval, thereby reducing the interference of the communication system on the voltage sampling when sending data, thereby improving the accuracy of the voltage data obtained by sampling.

[0069] In some embodiments, adjusting at least one of the communication timing and the sampling timing includes: adjusting the other timing based on one of the communication timing and the sampling timing as a reference timing.

[0070] The sampling timing may be adjusted based on the communication timing as a reference timing. In some embodiments, the communication timing may be adjusted based on the sampling timing as a reference timing.

[0071] In the above solution, by adjusting one of the timings based on the other timing, compared with adjusting the two timings at the same time, this solution is simpler.

[0072] In some embodiments, the communication timing is a reference timing, and the sampling timing includes sampling time nodes. Referring to FIG. 4 , the steps of adjusting one of the communication timing and the sampling timing as the reference timing may include the following steps: Step S121: Obtaining the length of a guard interval between adjacent frames in the communication timing. Step S122: Determining the sampling time nodes of the battery voltage sampling system based on the guard interval length.

[0073] As shown in Figure 5, a data frame includes at least a preamble, a payload, and a guard interval (GP). The guard interval is an important indicator of data transmission reliability. The guard interval can be understood as the time interval between adjacent data frames during data transmission. Its purpose is to reduce mutual interference between data frames and ensure the orderly transmission of data. Generally speaking, the guard interval = data frame size / transmission rate + transmission delay, where the data frame size can be understood as the size of the data frame to be transmitted, the transmission rate can be understood as the speed of data transmission, and the transmission delay can be understood as the time required for the data frame to be transmitted. Optionally, the guard interval length is a relatively fixed value in the communication system, that is, the guard interval length can be adjusted, but before the next adjustment, the current guard interval length is a fixed value.

[0074] The voltage sampling system can be an ADC. The sampling time node can be the sampling start time node or the time required for a single sampling. The specific method for determining the sampling time node of the voltage sampling system in the battery based on the protection interval duration is not specifically limited here. Shortening or increasing the sampling time required for the voltage sampling circuit based on the protection interval duration can be specifically understood as follows: if the protection interval duration is less than the preset single sampling time required, the single sampling time required can be shortened; if the protection interval duration is greater than the preset single sampling time required, the single sampling time required can be increased. Sampling the voltage across the battery based on the sampling time node to obtain voltage data can control the voltage sampling system to start and collect the corresponding voltage data. Single sampling can collect only one voltage data point, or it can collect multiple voltage data points within a time period. In other words, the collected voltage data can be a voltage data set.

[0075] In the above scheme, the length of the guard interval between adjacent frames in the communication sequence is obtained, and the sampling time node of the voltage sampling system in the battery is determined by the guard interval length. Compared with not referring to the guard interval length, this scheme can reduce the impact of the communication system sending data frames on the voltage sampling system when collecting voltage, thereby improving the accuracy of the sampled voltage data.

[0076] In some embodiments, the sampling time node includes a sampling start time node for a single sampling. The step of determining the sampling time node of the battery voltage sampling system based on the guard interval duration may include the following sub-steps: obtaining a single sampling duration required by the voltage sampling system. Then, based on the single sampling duration and the guard interval duration, determining the sampling start time node for the single sampling.

[0077] The time required for a single sampling can be considered as the time length from the sampling start time node to the sampling end time node. The sampling start time node of a single sampling can be considered as the time when the voltage sampling system starts from the sleep state or the time when the chip issues a sampling instruction. The sampling start time node of a single sampling determined can be within the protection interval or outside the protection interval, which can be determined specifically based on the time required for a single sampling and the length of the protection interval. For example, if the time required for a single sampling is greater than the protection interval, it is very likely that the sampling start time node is outside the protection interval. If the time required for a single sampling is less than or equal to the protection interval, the sampling start time node can be within the protection interval.

[0078] In the above solution, by combining the time required for a single sampling and the protection interval time, the sampling start time node of the single sampling can be better set, reducing the time when the data transmission process and the voltage sampling process overlap.

[0079] In some embodiments, the method for obtaining the time required for a single sampling of the voltage sampling system may be: obtaining the sum of the response time of the voltage sampling system and the duration of a single sampling as the time required for a single sampling.

[0080] The response time of the voltage sampling system can be understood as the time between the voltage sampling system going into sleep mode and acquiring voltage data, or the time between the chip issuing a sampling instruction and the voltage sampling system receiving and parsing the instruction. That is, during this response time, the voltage sampling system does not perform voltage sampling on the battery. The duration of a single sampling can be understood as the time it takes to acquire voltage data. For example, the voltage sampling system is originally in sleep mode, and starts to start after receiving a sampling instruction from the chip. It starts acquiring voltage data 0.1 seconds later and continues to acquire voltage data for 0.5 seconds. In this case, the response time of the voltage sampling system is 0.1 seconds, the duration of a single sampling is 0.5 seconds, and the time required for a single sampling is 0.6 seconds. This data is for example only and is not intended to limit this application.

[0081] In the above scheme, by combining the response time of the voltage sampling system and the duration of a single sampling, and comprehensively considering the time required for a single voltage sampling, the sampling start time node of the single sampling can be better set, reducing the time when the data transmission process and the voltage sampling process overlap.

[0082] In some embodiments, the method for determining the sampling start time node of a single sampling based on the required duration of a single sampling and the duration of a guard interval may be: in response to the required duration of a single sampling being greater than or equal to the duration of the guard interval, determining a first sampling start time node of the single sampling. Alternatively, in response to the required duration of a single sampling being less than the duration of the guard interval, determining a second sampling start time node of the single sampling. The time interval between the first sampling start time node and the center point of the duration of the guard interval is greater than the time interval between the second sampling start time node and the center point of the duration of the guard interval.

[0083] That is, the sampling start time node of a single sampling can be determined based on the size relationship between the time required for a single sampling and the protection interval time. The center point of the protection interval time can be the position where half of the protection interval time is located. For example, if the protection interval time is 0.8 seconds, the center point of the protection interval time is 0.4 seconds. Among them, the time interval between the first sampling start time node and the center point of the protection interval time is greater than the time interval between the second sampling start time node and the center point of the protection interval time, indicating that the second sampling start time node is closer to the center point of the protection interval time, that is, the single sampling corresponding to the second sampling start time node is less time outside the protection interval.

[0084] In the above scheme, if the time required for a single sampling is greater than or equal to the protection interval duration, then in order to ensure that fewer sampling time nodes coincide with the time of sending data frames, the sampling circuit can be controlled to perform sampling earlier, that is, the coincidence time between the response time and the sending data frame is increased, thereby reducing the coincidence time between the single sampling duration and the sending data frame. If the time required for a single sampling is less than the protection interval duration, the coincidence time between the response time and the sending data frame can be further reduced, that is, the time interval between the first sampling time node and the center point of the protection interval duration is greater than the time interval between the second sampling start time node and the center point of the protection interval duration.

[0085] In some embodiments, in response to the fact that the duration required for a single sampling is greater than or equal to the protection interval duration, the method for determining the first sampling start time node of the single sampling may be: aligning the center point of the single sampling duration with the center point of the protection interval duration to obtain the first sampling start time node; or, in response to the fact that the duration required for a single sampling is less than the protection interval duration, the method for determining the second sampling start time node of the single sampling may be: aligning the center point of the duration required for a single sampling with the center point of the protection interval duration to obtain the second sampling start time node.

[0086] Aligning with the center point of the protection interval allows sampling to be performed as close to the middle of the protection interval as possible, minimizing the impact of communication differential signals. Continuing with the previous example, if the duration of a single sampling is 0.5 seconds, the center point of the single sampling duration is 0.25 seconds. If the response time is 0.1 seconds, aligning the center point of the single sampling duration with the center point of the protection interval duration means aligning the 0.35 second point of the single sampling duration with the center point of the protection interval duration. If the single sampling duration is 0.6 seconds, the center point of the single sampling duration is 0.3 seconds, meaning aligning the 0.3 second point of the single sampling duration with the center point of the protection interval duration. Obviously, the second sampling start time node is closer to the center point of the protection interval duration than the first sampling start time node.

[0087] In the above scheme, if the duration required for a single sampling is greater than or equal to the protection interval duration, then the single sampling duration can be guaranteed to be within the protection interval as much as possible, and the center point of the single sampling duration can be aligned with the center point of the protection interval duration to determine the first sampling start time node, or if the duration required for a single sampling is less than the protection interval duration, then by aligning the center point of the single sampling duration with the center point of the protection interval duration, the overlap time between the response time and the sending data frame can be further reduced.

[0088] In some embodiments, the method further includes: determining a start time node and an end time node of a protection interval between adjacent frames in the communication system; and determining a duration of the protection interval based on the start time node and the end time node of the protection interval.

[0089] In some embodiments, each data frame in a communication system is generally transmitted in accordance with a communication protocol. This means that the guard interval between adjacent frames varies periodically and is not randomly generated. Therefore, by simply determining the start and end time nodes of one of the guard intervals, the periodic variation of the guard interval can be simulated. Similarly, it can be concluded that the voltage sampling system also performs periodic voltage sampling. In other embodiments, if the guard interval between adjacent frames does not vary periodically, the delay of the current data frame can be determined by detecting the start transmission time of the data frame and the size of the data frame, thereby obtaining the start and end time nodes of the guard interval. This allows the dynamic adjustment of the sampling start time nodes of each single sampling. This means that each single sampling does not vary periodically.

[0090] In the above scheme, by obtaining the start time node and end time node of the protection interval between each adjacent frame in the communication system, the protection interval duration can be obtained. By obtaining the start time node and end time node of the protection interval, it is convenient to control the voltage sampling system according to the start time node of the protection interval and the sampling start time node of the single sampling, and determine the sampling start time node of the single sampling in timing.

[0091] In some embodiments, determining a start time node and an end time node of a protection interval between adjacent frames in a communication system includes: synchronizing a clock of a voltage sampling system with a clock of a communication system; and determining a start time node and an end time node based on the synchronized clock of the communication system.

[0092] Depending on the communication system's standard, specific information about the guard interval can be obtained. Alternatively, the voltage sampling system can be connected to the network and then synchronized with the communication system's clock using its time slots. The synchronized clock can then be used to determine the absolute start and end times of each guard interval within the communication system, i.e., the start and end times.

[0093] In the above solution, by synchronizing the clock of the voltage sampling system with the clock of the communication system, it is convenient to subsequently determine the protection interval duration based on the synchronized clock of the communication system.

[0094] In some embodiments, the method further includes: performing data processing on the voltage data sampled at multiple moments to obtain processed voltage data, where the data processing includes digital filtering and / or smoothing processing; and sending the processed voltage data to a preset recipient.

[0095] The voltage data sampled at multiple moments can be the voltage data sampled at multiple moments once, or the voltage data sampled multiple times. The smoothing method can be to take the average of the previous n times, or to compare the size sampling value with the previous m times, and discard it if the deviation exceeds a preset range. There are many ways of digital filtering, which will not be elaborated here.

[0096] In the above solution, by performing data processing such as digital filtering and smoothing processing on the sampled voltage data, the subsequent preset recipient can perform corresponding processing based on more accurate voltage data.

[0097] In some embodiments, the input signal range of a general ADC is about 0 to 3.3V. Once there is interference from other voltage signals during sampling, it will have a great impact on the sampling result. In this solution, according to the characteristics of the communication system, a time-domain synchronization method is adopted to obtain the start and end times of the guard period (GP Guard Period) slots between adjacent data frames. Then, combined with the characteristics of the voltage sampling system (response time, sampling duration, etc.), data sampling is performed at a time position as close as possible to the middle of the guard period slot to minimize the impact of communication differential signals.

[0098] Specifically, in combination with the communication transmission technology used, precise time slot synchronization is used to align the system clock. And according to the characteristics of the devices to be used, accurately obtain the response time Tr and sampling duration Tl of the sampling device, and then according to the communication transmission technology used, accurately obtain the guard period slot duration Tgp. Then, determine the sampling start time node according to the relationship between the value of Tr + Tl and Tgp. In addition, a voltage sampling system with Tr + Tl < Tgp is preferably selected to improve the sampling accuracy. Specifically:

[0099] a. When Tr + Tl > Tgp, align the center point of Tl with the center point of Tgp;

[0100] b. When Tr + Tl = Tgp, align the center point of Tl with the center point of Tgp;

[0101] c. When Tr + Tl < Tgp, align the center point of Tr + Tl with the center point of Tgp.

[0102] Among them, after sampling, operations such as digital filtering and smoothing (for example, taking the average of the previous 16 times, or comparing the size sampling value with the previous times and discarding it if the deviation exceeds a certain range) can be performed before transmission.

[0103] In the above scheme, the length of the guard interval between adjacent frames in the communication sequence is obtained, and the sampling time node of the voltage sampling system in the battery is determined by the guard interval length. Compared with not referring to the guard interval length, this scheme can reduce the impact of the communication system sending data frames on the voltage sampling system when collecting voltage, thereby improving the accuracy of the sampled voltage data.

[0104] In some embodiments, the functions or modules included in the device provided by the embodiments of the present disclosure can be used to execute the method described in the above method embodiments. The specific implementation can refer to the description of the above method embodiments. For the sake of brevity, it will not be repeated here.

[0105] The above description of the various embodiments tends to emphasize the differences between the various embodiments. The same or similar aspects can be referenced with each other and will not be repeated herein for the sake of brevity.

[0106] In the several embodiments provided in this application, it should be understood that the disclosed methods and devices can be implemented in other ways. For example, the device implementation methods described above are only schematic. For example, the division of modules or units is only a logical function division. There may be other division methods in actual implementation. For example, units or components can be combined or integrated into another subsystem, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of devices or units can be electrical, mechanical or other forms.

Claims

1. A battery, characterized in that: The battery comprises: shell; a communication system connected to the housing; A voltage sampling system connected to the housing; A controller is connected to the communication system and the voltage sampling system respectively, and is used to control the communication timing of the communication system and the sampling timing interval setting of the voltage sampling system.

2. The battery according to claim 1, characterized in that The housing includes a shell with an opening and an end cover, and the communication system, the voltage sampling system and the controller are connected to the end cover.

3. The battery according to claim 2, characterized in that The communication system, the voltage sampling system and the controller are arranged on a side of the end cover facing the housing.

4. The battery according to claim 2 or 3, characterized in that: The communication system, the voltage sampling system and the controller are integrated on a chip.

5. A voltage sampling method, characterized in that: The voltage sampling method is applied to the battery according to any one of claims 1 to 4, and the voltage sampling method comprises: Obtaining the communication timing of the communication system in the battery and the sampling timing of the voltage sampling system; adjusting at least one of the communication timing and the sampling timing so that the communication timing and the sampling timing are spaced apart; The voltage at both ends of the battery is sampled according to the current sampling timing to obtain voltage data.

6. The method according to claim 5, characterized in that The adjusting at least one of the communication timing and the sampling timing comprises: One of the communication timing and the sampling timing is used as a reference timing to adjust the other timing.

7. The method according to claim 6, characterized in that The communication timing is a reference timing, the sampling timing includes a sampling time node, and taking one of the communication timing and the sampling timing as a reference timing and adjusting the other timing to obtain a target timing includes: Obtaining the length of the protection interval between adjacent frames in the communication sequence; A sampling time node of a voltage sampling system in the battery is determined according to the protection interval duration.

8. The method according to claim 7, characterized in that The sampling time node includes a sampling start time node, and determining the sampling time node of the voltage sampling system in the battery according to the protection interval duration includes: Obtaining the time required for a single sampling of the voltage sampling system; Based on the time required for the single sampling and the protection interval time, a sampling start time node of the single sampling is determined.

9. The method according to claim 8, characterized in that The time required for obtaining a single sampling of the voltage sampling system includes: The sum of the response time of the voltage sampling system and the duration of a single sampling is obtained as the duration required for a single sampling.

10. The method according to claim 8, characterized in that The determining of a sampling start time node of a single sampling based on the time required for the single sampling and the time length of the protection interval includes: In response to the time length required for the single sampling being greater than or equal to the time length of the protection interval, determining a first sampling start time node of the single sampling; Alternatively, in response to the time required for the single sampling being less than the time length of the protection interval, determining a second sampling start time node for the single sampling; The time interval between the first sampling start time node and the center point of the protection interval duration is greater than the time interval between the second sampling start time node and the center point of the protection interval duration.

11. The method according to claim 10, characterized in that In response to the time length required for the single sampling being greater than or equal to the time length of the protection interval, determining a first sampling start time node of the single sampling includes: Align the center point of the single sampling duration with the center point of the protection interval duration to obtain the first sampling start time; Or, in response to the time required for the single sampling being less than the protection interval time, determining a second sampling start time node for the single sampling includes: The center point of the duration required for the single sampling is aligned with the center point of the protection interval duration to obtain the second sampling start time.

12. The method according to any one of claims 7 to 11, characterized in that The method further comprises: Determine a start time node and an end time node of a protection interval between adjacent frames in the communication system; The duration of the guard interval is determined based on the start time node and the end time node of the guard interval.

13. The method according to claim 12, characterized in that The determining of a start time node and an end time node of a protection interval between adjacent frames in the communication system comprises: Synchronizing a clock of the voltage sampling system with a clock of the communication system; The start time node and the end time node are determined according to the synchronized clock of the communication system.

14. The method according to any one of claims 5 to 13, characterized in that The method further comprises: Performing data processing on the voltage data sampled at multiple moments to obtain processed voltage data, wherein the data processing includes digital filtering and / or smoothing processing; The processed voltage data is sent to a preset recipient.

15. An electrical device, characterized in that: The electrical device comprises the battery according to any one of claims 1 to 4.

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