Battery cell control method and device of vehicle battery system, vehicle and medium

Abstract

The invention discloses a battery cell control method and device of a vehicle battery system, a vehicle and a medium, and the method comprises the steps: obtaining battery cell voltage data corresponding to a power battery of a target vehicle, and determining a target battery cell according to the battery cell voltage data; performing voltage equalization on the target battery cell, and obtaining a voltage equalization duration corresponding to the target battery cell; and determining a fault protection level corresponding to the target battery cell based on the voltage balance duration, and adjusting the output capability of the target battery cell based on the fault protection level. Based on the technical scheme, the target battery cell is determined by detecting the voltage data of each battery cell, the voltage balancing is performed on the target battery cell, and the output capability of the target battery cell is adjusted based on the voltage balancing duration, so that the safety performance of the power battery is improved, and the service life of the battery is prolonged.

Description

Technical Field

[0001] This invention relates to the field of vehicle battery control technology, and in particular to a cell control method, device, vehicle, and medium for a vehicle battery system. Background Technology

[0002] With the continuous optimization and development of the performance of power batteries for new energy vehicles, all new energy electric vehicles will be equipped with a separate low-voltage power supply for powering key equipment of the vehicle, such as providing stable power to non-driving equipment such as body controllers, instrument panels, headlights, wipers, and air conditioning compressors, to ensure the operation of the vehicle's basic functions.

[0003] However, traditional controllers only support a single voltage output, which cannot meet the diverse power supply needs of vehicle electronic devices. Furthermore, the power-off delay during voltage switching is too high, affecting the operation of critical equipment such as the ECU. In the event of a malfunction, the vehicle's power supply equipment will not be able to operate normally. Summary of the Invention

[0004] This invention provides a cell control method, device, vehicle, and medium for a vehicle battery system. By detecting the voltage data of each cell, a target cell is determined, and voltage equalization is performed on the target cell. Based on the voltage equalization time, the output capability of the target cell is adjusted, thereby improving the safety performance of the power battery and extending the battery life.

[0005] According to one aspect of the present invention, a cell control method for a vehicle battery system is provided, comprising:

[0006] Obtain cell voltage data corresponding to the power battery of the target vehicle, and determine the target cell based on the cell voltage data;

[0007] The target battery cell is subjected to voltage equalization, and the voltage equalization duration corresponding to the target battery cell is obtained;

[0008] Based on the voltage equalization duration, a fault protection level corresponding to the target cell is determined, and the output capability of the target cell is adjusted based on the fault protection level.

[0009] According to another aspect of the present invention, a cell control device for a vehicle battery system is provided, comprising:

[0010] The data acquisition module is used to acquire cell voltage data corresponding to the power battery of the target vehicle, and to determine the target cell based on the cell voltage data.

[0011] A voltage equalization module is used to perform voltage equalization on the target battery cell and obtain the voltage equalization duration corresponding to the target battery cell.

[0012] The fault adjustment module is used to determine the fault protection level corresponding to the target cell based on the voltage equalization duration, and adjust the output capability of the target cell based on the fault protection level.

[0013] According to another aspect of the present invention, a vehicle is provided, wherein the vehicle is provided with:

[0014] At least one processor; and

[0015] A memory communicatively connected to the at least one processor; wherein,

[0016] The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the cell control method of the vehicle battery system according to any one of claims 1-7.

[0017] According to another aspect of the present invention, a computer-readable storage medium is provided, the computer-readable storage medium storing computer instructions for causing a processor to execute and implement the cell control method of the vehicle battery system according to any embodiment of the present invention.

[0018] The technical solution of this invention involves acquiring cell voltage data corresponding to the power battery of a target vehicle, and determining a target cell based on the cell voltage data; performing voltage equalization on the target cell and acquiring the voltage equalization duration corresponding to the target cell; determining a fault protection level corresponding to the target cell based on the voltage equalization duration; and adjusting the output capability of the target cell based on the fault protection level. Based on the above technical solution, by detecting the voltage data of each cell to determine the target cell, performing voltage equalization on the target cell, and adjusting the output capability of the target cell based on the voltage equalization duration, the safety performance of the power battery is improved, and battery life is extended.

[0019] It should be understood that the description in this section is not intended to identify key or essential features of the embodiments of the present invention, nor is it intended to limit the scope of the invention. Other features of the invention will become readily apparent from the following description. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1This is a flowchart of a cell control method for a vehicle battery system provided in an embodiment of the present invention;

[0022] Figure 2 This is a flowchart of a cell control method for a vehicle battery system provided in an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of a cell control device for a vehicle battery system provided in an embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the electronic device provided in an embodiment of the present invention. Detailed Implementation

[0025] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0026] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0027] Figure 1 This is a flowchart illustrating a cell control method for a vehicle battery system according to an embodiment of the present invention. This embodiment is applicable to situations where, during the power supply process of a vehicle's power battery, voltage balancing of individual cells and adjustment of cell output capacity are performed. This method can be executed by a cell control device of the vehicle battery system, which can be implemented in hardware and / or software and can be configured in an electronic device. Figure 1 As shown, the method specifically includes the following steps:

[0028] S110. Obtain the cell voltage data corresponding to the power battery of the target vehicle, and determine the target cell based on the cell voltage data.

[0029] The target vehicles are new energy vehicles equipped with rechargeable power batteries, which can include various types of vehicles such as pure electric passenger vehicles and hybrid commercial vehicles. The power battery provides continuous power to the vehicle's drive system and onboard electrical equipment; the cell voltage data can be the real-time voltage monitoring value of each individual cell within the power battery, reflecting the current energy storage state and operating performance of each cell. The target cells are individual cells identified through cell voltage data screening that exhibit abnormalities or require control.

[0030] Specifically, the process involves acquiring cell voltage data corresponding to the target vehicle's power battery and determining the target cell based on this data. For example, the voltage acquisition module integrated within the power battery can acquire voltage signals from all individual cells at a preset sampling frequency, such as every 500ms. Simultaneously, parameters such as battery pack temperature and charging / discharging current at the acquisition time are recorded. The acquired cell voltage data is then transmitted to the BMS main control unit. The main control unit can preprocess the data and determine the target cell based on the preprocessed data. For instance, the raw data can be filtered to remove abnormal pulse data caused by electromagnetic interference. The processed cell voltage is then compared with preset voltage threshold ranges, including the upper and lower limits of the normal operating voltage of individual cells and the voltage equalization threshold between cells, to determine the target cell.

[0031] Based on the above technical solution, the cell voltage data corresponding to the power battery of the target vehicle is obtained, including: determining each battery cell corresponding to the power battery of the target vehicle, and determining the data sampling circuit corresponding to each battery cell; and collecting the cell voltage data corresponding to each battery cell based on the data sampling circuit.

[0032] The battery cell is the smallest energy storage unit in a power battery and is a component that makes up battery modules and battery packs. An artificial intelligence controller and a DC-DC converter are installed on the data sampling circuit. The data sampling circuit is the circuit path connecting the battery cell and the battery management system (BMS), used to transmit the cell's voltage signal and other monitoring data, such as cell temperature and cell output current. The artificial intelligence controller can be an electronic component with data analysis and adaptive adjustment capabilities, used to control the output capability of an individual cell. The DC-DC converter can be a pre-configured multi-functional DC-DC converter.

[0033] It should be noted that the technical solution of this application introduces a multi-functional DC-DC converter into the electrical architecture of the battery pack, introduces a small AI control unit into each cell sampling circuit (such as FPC) and integrates it into the sampling circuit, which is used to dynamically regulate the voltage of each cell and establish a multi-dimensional consistency compensation system. By integrating a bidirectional DC-DC topology, the voltage deviation is compensated by dynamic current injection and equipped with a self-learning algorithm to establish a cell capacity-internal resistance-temperature correlation model. The multi-functional DC-DC converter adopts a configuration of three independent IGBT bridge arms, supports a maximum continuous output current of 200A, and supports path switching of three different voltages: 12V / 24V / 48V.

[0034] Specifically, each battery cell corresponding to the target vehicle's power battery is identified, and a data sampling circuit corresponding to each battery cell is determined. Then, cell voltage data corresponding to each battery cell is collected based on the data sampling circuit. For example, the specific location of all battery cells can be determined based on the power battery structure, thereby identifying the data sampling circuit corresponding to each battery cell. The cell voltage data corresponding to each battery cell is then collected based on the data sampling circuit. It should be noted that the AI ​​controller can establish a corresponding three-dimensional feature database of cell voltage-SOC-temperature based on the historical operating data of the cells. The AI ​​controller then collects the cell voltage data corresponding to the cells based on this feature database and the data sampling circuit. For example, after collecting the cell voltage and temperature data, the collected data is corrected using the cell voltage-SOC-temperature three-dimensional feature database, and the corrected data is used as the cell voltage data.

[0035] Based on the above technical solution, the target battery cell is determined according to the battery cell voltage data, including: determining the average voltage value corresponding to the power battery of the target vehicle based on the battery cell voltage data; determining the voltage difference data between the battery cell voltage data and the average voltage value; and if the voltage difference data is greater than a preset voltage threshold, the battery cell corresponding to the battery cell voltage data is taken as the target battery cell.

[0036] The average voltage value is calculated by statistically analyzing the voltage data of all battery cells and serves as a benchmark for determining whether the cell voltage is normal. The voltage difference data is the difference between the voltage data of an individual cell and the average voltage value, used to determine the degree of deviation between the voltage level of an individual cell and the overall cell voltage level. The preset voltage threshold is a pre-set critical value used to determine whether the cell voltage deviation exceeds the normal range, used to filter out cells with abnormal voltage. The target cell is the cell with abnormal voltage identified after comparing the voltage difference data.

[0037] Specifically, based on the cell voltage data, the average voltage value corresponding to the power battery of the target vehicle is determined; the voltage difference data between the cell voltage data and the average voltage value is determined; if the voltage difference data is greater than a preset voltage threshold, the battery cell corresponding to the cell voltage data is designated as the target cell. For example, all collected cell voltage data can be retrieved from the battery management system, and the average voltage value of the power battery can be obtained by summing and averaging the cell voltage data. The voltage data of each cell is then calculated by subtracting the average voltage value to generate the corresponding voltage difference data. The voltage difference data is compared with the preset voltage threshold. If the voltage difference data of a cell exceeds the preset voltage threshold, it indicates that the voltage of the cell deviates too much from the overall level. The cell is then marked as the target cell, and the location information and voltage deviation of the cell are recorded.

[0038] S120. Perform voltage equalization on the target cell and obtain the voltage equalization duration corresponding to the target cell.

[0039] Voltage equalization involves adjusting the target cell voltage to bring its real-time voltage closer to the average voltage of the power battery, thereby improving voltage consistency between cells and ensuring overall battery performance. Voltage equalization duration is the time elapsed from initiating the equalization operation until the target cell voltage reaches the preset equalization standard; it is used to evaluate equalization efficiency and assess the target cell's voltage recovery capability.

[0040] Specifically, voltage equalization is performed on the target battery cell, and the corresponding voltage equalization duration is obtained. For example, the battery management system can select a voltage equalization mode based on the degree of voltage deviation of the target battery cell. If the deviation is small, a passive equalization mode is used, which can supply power to the vehicle's electrical components from the target battery cell, thereby reducing the voltage value of the target battery cell. If the deviation is large, an active equalization mode is switched, which uses a pre-set multi-functional DC-DC converter to transfer excess energy from the target battery cell to the cell with the lower voltage. After the equalization operation is started, the voltage change of the target battery cell is monitored, and the equalization start time is recorded. When the difference between the target battery cell voltage and the average voltage value is reduced to meet the preset equalization standard, the corresponding voltage equalization duration is recorded. For example, the system obtains the requirements of the vehicle's electrical equipment via the CAN bus, and uses an improved AI algorithm combined with a multi-functional DC-DC converter for voltage path planning. The control scheme is as follows: It quickly detects each cell in the system, establishes a three-dimensional feature database of cell voltage-SOC-temperature, and dynamically compensates cells with voltage difference deviations exceeding the threshold in all weather conditions before releasing them to the vehicle's electrical equipment. At the same time, it sets a three-level degradation mode to ensure that the entire architecture operates with high safety redundancy, realizing a triple safety protection mechanism at the hardware, software, and data levels, thereby improving the life and safety performance of the power battery.

[0041] Based on the above technical solution, voltage balancing of the target battery cell is performed, including: when the target battery cell is a high-voltage battery cell, the artificial intelligence controller controls the DC converter to supply power to the vehicle's on-board equipment; when the target battery cell is a low-voltage battery cell, the artificial intelligence controller controls the DC converter to draw current from the healthy battery cell and inject it into the target battery cell.

[0042] Among them, high-voltage cells are target cells with voltage values ​​higher than the average voltage value of the power battery and exceeding a preset reasonable range. Low-voltage cells are target cells with voltage values ​​lower than the average voltage value of the power battery and exceeding a preset reasonable range. Healthy cells are battery cells with voltage values ​​within the reasonable range of the average voltage value of the power battery and without abnormal conditions.

[0043] Specifically, for a target battery cell, its voltage type can be determined based on voltage difference data. If the voltage difference is positive and exceeds a preset reasonable range, the target battery cell is marked as a high-voltage cell; if the voltage difference is negative and exceeds a preset reasonable range, it is marked as a low-voltage cell. The preset reasonable range can be ±10mV. For high-voltage cells, the three independent IGBT bridge arms in the multi-functional DC-DC converter are adjusted to the voltage channels corresponding to different vehicle electrical appliances, releasing the voltage of the high-voltage cell to the corresponding vehicle electrical appliances. For low-voltage cells, the artificial intelligence controller sends power extraction and injection commands to the DC-DC converter. The DC-DC converter first identifies and connects to healthy cells, extracts current from healthy cells, and then injects current into low-voltage cells through a dedicated circuit. When the voltage of the low-voltage cell approaches the reasonable range of the average voltage value, the current injection intensity is gradually adjusted until an equilibrium standard is reached, at which point the DC-DC converter stops operating. For example, if the cell voltage is too low (below the average voltage by more than 30mV): the AI ​​control unit controls the bidirectional channel of the multi-functional DC-DC converter to draw a small current from the adjacent healthy cell and inject it into the deviating cell until the voltage difference is reduced to within ±10mV; if the cell voltage is too high (above the average voltage by more than 30mV): the AI ​​control unit controls the cell to supply power to the vehicle's 12V / 24V devices through the low-voltage channel of the DC-DC converter to achieve voltage release.

[0044] S130. Determine the fault protection level corresponding to the target cell based on the voltage equalization time, and adjust the output capability of the target cell based on the fault protection level.

[0045] Among them, the fault protection level is a standard used to define the severity of the target cell's fault and the corresponding protective measures, based on the voltage equalization time. Output capacity refers to the maximum range of electrical energy that the target cell can output during operation, including output current and power.

[0046] Specifically, the fault protection level corresponding to the target cell is determined based on the voltage equalization time. The output capability of the target cell is then adjusted based on the fault protection level. For example, the battery management system determines the corresponding fault protection level by comparing the voltage equalization time of the target cell with a preset time classification standard. If the equalization time is in a short range, it indicates that the cell voltage recovery speed is fast and the fault severity is mild, and it is judged as a low fault protection level. If the equalization time is in a medium range, the cell voltage recovery speed is average and the fault severity is moderate, and it is judged as a medium fault protection level. If the equalization time is in a long range, the cell voltage recovery is slow and the fault severity is severe, and it is judged as a high fault protection level. After determining the fault protection level, for the low fault protection level, the output power is slightly limited to ensure that the cell can participate in power supply normally. For the medium fault protection level, the output current and power are moderately reduced to reduce the cell's workload. For the high fault protection level, the output capability is significantly limited, allowing the cell to only maintain basic power supply.

[0047] The technical solution of this invention involves acquiring cell voltage data corresponding to the power battery of a target vehicle and determining the target cell based on the cell voltage data; performing voltage equalization on the target cell and acquiring the voltage equalization duration corresponding to the target cell; determining the fault protection level corresponding to the target cell based on the voltage equalization duration; and adjusting the output capability of the target cell based on the fault protection level. Based on the above technical solution, by detecting the voltage data of each cell to determine the target cell, performing voltage equalization on the target cell, and adjusting the output capability of the target cell based on the voltage equalization duration, the safety performance of the power battery is improved, and the battery life is extended.

[0048] In one possible implementation of the present invention Figure 2 A flowchart of a cell control method for a vehicle battery system provided in an embodiment of the present invention is shown below. Figure 2 As shown, the method for determining the fault protection level corresponding to the target cell based on the voltage equalization time in this embodiment also includes:

[0049] S210, Obtain the equilibrium duration interval corresponding to the target vehicle.

[0050] Among them, the equalization time range is a standard range set for the characteristics of the target vehicle's power battery, which includes the normal voltage equalization time range, and is used to determine whether the voltage equalization time of the target cell is within a reasonable range.

[0051] Specifically, obtaining the equilibrium duration range corresponding to the target vehicle involves retrieving basic information about the target vehicle, including the battery model, number of cells, age, and historical charge / discharge records. Based on this information, a corresponding equilibrium duration range is determined. This range is then refined by considering the vehicle's actual operating conditions, such as daily mileage, charging frequency, and environmental temperature adaptability. For example, if the target vehicle is used in low-temperature environments for extended periods, the upper limit of the equilibrium duration is relaxed. Finally, the equilibrium duration range for the target vehicle is generated and stored in the vehicle's parameter database, which can then be retrieved later.

[0052] S220. Determine the fault protection level corresponding to the target cell based on the equalization time interval and voltage equalization time.

[0053] Specifically, the actual voltage equalization time is compared with the equalization time range: if the actual time is within the range, it indicates that the cell voltage recovery efficiency is normal and the fault risk is low, and it is judged as a low fault protection level; if the actual time exceeds the upper limit of the range but does not reach 1.5 times the upper limit, it indicates that the cell recovery speed is slowed down and there is a slight fault risk, and it is judged as a medium fault protection level; if the actual time exceeds 1.5 times or more the upper limit of the range, it indicates that the cell recovery capability has decreased significantly and the fault risk is high, and it is judged as a high fault protection level.

[0054] Based on the above technical solution, the fault protection level corresponding to the target cell is determined based on the equalization time interval and voltage equalization time, including: when the voltage equalization time is in the first time interval, the protection level of the target cell is determined to be Level 1 protection; when the voltage equalization time is in the second time interval, the protection level of the target cell is determined to be Level 2 protection; and when the voltage equalization time is in the third time interval, the protection level of the target cell is determined to be Level 3 protection.

[0055] The protection levels are as follows: Level 1 protection is a light protection level for target cells with fast voltage recovery and low fault risk; Level 2 protection is a medium protection level for target cells with moderate voltage recovery and some fault risk; and Level 3 protection is a heavy protection level for target cells with slow voltage recovery and high fault risk. The values ​​in the first time interval are less than the values ​​in the second time interval; the values ​​in the second time interval are less than the values ​​in the third time interval. It should be noted that the first time interval is 0-10ms; the second time interval is 10ms-50ms; and the third time interval is 50ms-100ms.

[0056] Specifically, by comparing the voltage equalization duration with three duration intervals, the protection level corresponding to the target battery cell is determined. If the duration falls within the first duration interval, the protection level of the target battery cell is immediately set to primary protection; if the duration falls within the second duration interval, it is determined as secondary protection; if the duration falls within the third duration interval, it is determined as tertiary protection.

[0057] Based on the above technical solution, the output capacity of the target battery cell is adjusted based on the fault protection level, including: in the case of primary protection for the fault protection level, the DC converter is controlled by the artificial intelligence controller to output in the full-channel rated state; in the case of secondary protection for the fault protection level, the DC converter is controlled by the artificial intelligence controller to switch to the standby channel for output; in the case of tertiary protection for the fault protection level, the DC converter is controlled by the artificial intelligence controller to start the emergency power supply for output.

[0058] Among them, the full-channel rated state is the operating state in which all output channels of the DC converter operate according to the designed rated parameters. The standby channel is a redundant channel preset in the DC converter for replacing the main output channel. The emergency power supply is a backup power supply supporting the DC converter and used to provide basic electrical energy when the risk of battery cell failure is high, to avoid power-off of core vehicle-mounted devices.

[0059] Specifically, the battery management system transmits the fault protection level information of the target battery cell to the artificial intelligence controller. If it is determined as primary protection, the artificial intelligence controller sends a full-channel start instruction to the DC converter, and the DC converter activates all output channels to supply power to the vehicle-mounted devices according to parameters such as rated power and voltage; if it is determined as secondary protection, the controller first instructs the DC converter to suspend the output of the main channel, then activates the standby channel. After completing the channel switch, it verifies whether the output parameters of the standby channel meet the standards, and maintains normal power supply after confirmation; if it is determined as tertiary protection, the emergency mode is triggered, instructing the DC converter to disconnect the direct connection with the target battery cell, and at the same time start the emergency power supply, adjust the output parameters of the emergency power supply to adapt to the requirements of the core vehicle-mounted devices, ensure power supply to key systems such as steering and lighting, and continuously monitor the status of the emergency power supply during this period until the fault is eliminated or the vehicle stops safely.

[0060] The technical solution of the embodiment of the present invention introduces the AI algorithm into the voltage reconstruction field, achieving a voltage output accuracy of ±10mv, improving the overall pack consistency, and enhancing the battery safety. Through the multi-functional DC-DC converter, three groups of independent IGBT bridge arms are configured for flexible switching (12V / 24V / 48V) to adapt to vehicle electrical appliances. In case of collision power-off or low-voltage power supply failure, it ensures that the vehicle is powered all-weather without interruption, improving the life and property safety of drivers, passengers and surrounding people.

[0061] Figure 3This is a schematic diagram of the structure of a cell control device for a vehicle battery system provided in an embodiment of the present invention. Figure 3 As shown, the device includes: a data acquisition module 310, a voltage equalization module 320, and a fault adjustment module 330.

[0062] The data acquisition module 310 is used to acquire cell voltage data corresponding to the power battery of the target vehicle, and to determine the target cell based on the cell voltage data.

[0063] The voltage equalization module 320 is used to perform voltage equalization on the target battery cell and obtain the voltage equalization duration corresponding to the target battery cell.

[0064] The fault adjustment module 330 is used to determine the fault protection level corresponding to the target cell based on the voltage equalization time, and adjust the output capability of the target cell based on the fault protection level.

[0065] Based on the above technical solution, the fault adjustment module is used to obtain the equalization time interval corresponding to the target vehicle; and to determine the fault protection level corresponding to the target cell based on the equalization time interval and the voltage equalization time.

[0066] Based on the above technical solution, the fault adjustment module is used to determine the protection level of the target cell as Level 1 protection when the voltage balancing time is in the first time interval; to determine the protection level of the target cell as Level 2 protection when the voltage balancing time is in the second time interval; and to determine the protection level of the target cell as Level 3 protection when the voltage balancing time is in the third time interval; wherein the value in the first time interval is less than the value in the second time interval; and the value in the second time interval is less than the value in the third time interval.

[0067] Based on the above technical solution, the fault adjustment module is used to control the DC converter to output at full-channel rated state through the artificial intelligence controller when the fault protection level is Level 1; to control the DC converter to switch to the backup channel for output through the artificial intelligence controller when the fault protection level is Level 2; and to control the DC converter to start the emergency power supply for output through the artificial intelligence controller when the fault protection level is Level 3.

[0068] Based on the above technical solution, the data acquisition module is used to determine each battery cell corresponding to the power battery of the target vehicle, and to determine the data sampling circuit corresponding to each battery cell. The data sampling circuit is equipped with an artificial intelligence controller and a DC-DC converter. The cell voltage data corresponding to each battery cell is acquired based on the data sampling circuit.

[0069] Based on the above technical solution, the data acquisition module is used to determine the average voltage value corresponding to the power battery of the target vehicle based on the cell voltage data; determine the voltage difference data between the cell voltage data and the average voltage value; and if the voltage difference data is greater than a preset voltage threshold, the battery cell corresponding to the cell voltage data is taken as the target cell.

[0070] Based on the above technical solution, the voltage balancing module is used to control the DC converter to supply power to the vehicle's on-board equipment when the target battery cell is a high-voltage battery cell, through an artificial intelligence controller; and when the target battery cell is a low-voltage battery cell, it controls the DC converter to draw current from the healthy battery cell and inject it into the target battery cell.

[0071] The technical solution of this invention involves acquiring cell voltage data corresponding to the power battery of a target vehicle and determining the target cell based on the cell voltage data; performing voltage equalization on the target cell and acquiring the voltage equalization duration corresponding to the target cell; determining the fault protection level corresponding to the target cell based on the voltage equalization duration; and adjusting the output capability of the target cell based on the fault protection level. Based on the above technical solution, by detecting the voltage data of each cell to determine the target cell, performing voltage equalization on the target cell, and adjusting the output capability of the target cell based on the voltage equalization duration, the safety performance of the power battery is improved, and the battery life is extended.

[0072] The cell control device for the vehicle battery system provided in this embodiment of the invention can execute the cell control method for the vehicle battery system provided in any embodiment of the invention, and has the corresponding functional modules and beneficial effects of executing the method.

[0073] Figure 4 A schematic diagram of an electronic device 10, which can be used to implement embodiments of the present invention, is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processors, cellular phones, smartphones, wearable devices (e.g., helmets, glasses, watches, etc.), and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the invention described and / or claimed herein.

[0074] like Figure 4As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12 or a random access memory (RAM) 13, communicatively connected to the at least one processor 11. The memory stores computer programs executable by the at least one processor. The processor 11 can perform various appropriate actions and processes based on the computer program stored in the ROM 12 or loaded into the RAM 13 from storage unit 18. The RAM 13 can also store various programs and data required for the operation of the electronic device 10. The processor 11, ROM 12, and RAM 13 are interconnected via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0075] Multiple components in electronic device 10 are connected to I / O interface 15, including: input unit 16, such as keyboard, mouse, etc.; output unit 17, such as various types of displays, speakers, etc.; storage unit 18, such as disk, optical disk, etc.; and communication unit 19, such as network card, modem, wireless transceiver, etc. Communication unit 19 allows electronic device 10 to exchange information / data with other devices through computer networks such as the Internet and / or various telecommunications networks.

[0076] Processor 11 can be a variety of general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various special-purpose artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. Processor 11 performs the various methods and processes described above, such as cell control methods for vehicle battery systems.

[0077] In some embodiments, the cell control method of the vehicle battery system may be implemented as a computer program tangibly contained in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program may be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the cell control method of the vehicle battery system described above may be performed. Alternatively, in other embodiments, processor 11 may be configured to perform the cell control method of the vehicle battery system by any other suitable means (e.g., by means of firmware).

[0078] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload-programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments may include implementations in one or more computer programs that can be executed and / or interpreted on a programmable system including at least one programmable processor, which may be a dedicated or general-purpose programmable processor, capable of receiving data and instructions from a storage system, at least one input device, and at least one output device, and transmitting data and instructions to the storage system, the at least one input device, and the at least one output device.

[0079] Computer programs used to implement the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when executed by the processor, the computer programs cause the functions / operations specified in the flowcharts and / or block diagrams to be performed. The computer programs may be executed entirely on a machine, partially on a machine, or as a standalone software package, partially on a machine and partially on a remote machine, or entirely on a remote machine or server.

[0080] In the context of this invention, a computer-readable storage medium can be a tangible medium that may contain or store a computer program for use by or in conjunction with an instruction execution system, apparatus, or device. A computer-readable storage medium may include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination thereof. Alternatively, a computer-readable storage medium may be a machine-readable signal medium. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination thereof.

[0081] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user provides input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including sound input, voice input, or tactile input).

[0082] The systems and technologies described herein can be implemented in computing systems that include backend components (e.g., as data servers), or middleware components (e.g., application servers), or frontend components (e.g., user computers with graphical user interfaces or web browsers through which users can interact with implementations of the systems and technologies described herein), or any combination of such backend, middleware, or frontend components. The components of the system can be interconnected via digital data communication of any form or medium (e.g., communication networks). Examples of communication networks include local area networks (LANs), wide area networks (WANs), blockchain networks, and the Internet.

[0083] A computing system can include clients and servers. Clients and servers are generally located far apart and typically interact through communication networks. The client-server relationship is created by computer programs running on the respective computers and having a client-server relationship with each other. The server can be a cloud server, also known as a cloud computing server or cloud host, which is a hosting product within the cloud computing service system to address the shortcomings of traditional physical hosts and VPS services, such as high management difficulty and weak business scalability.

[0084] It should be understood that the various forms of processes shown above can be used, with steps reordered, added, or deleted. For example, the steps described in this invention can be executed in parallel, sequentially, or in different orders, as long as the desired result of the technical solution of this invention can be achieved, and this is not limited herein.

[0085] The specific embodiments described above do not constitute a limitation on the scope of protection of this invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this invention should be included within the scope of protection of this invention.

Claims

1. A cell control method for a vehicle battery system, characterized in that, include: Obtain cell voltage data corresponding to the power battery of the target vehicle, and determine the target cell based on the cell voltage data; The target battery cell is subjected to voltage equalization, and the voltage equalization duration corresponding to the target battery cell is obtained; Based on the voltage equalization duration, a fault protection level corresponding to the target cell is determined, and the output capability of the target cell is adjusted based on the fault protection level.

2. The method according to claim 1, characterized in that, The process of determining the fault protection level corresponding to the target cell based on the voltage equalization duration includes: Obtain the equilibrium duration interval corresponding to the target vehicle; The fault protection level corresponding to the target cell is determined based on the equalization time interval and the voltage equalization time.

3. The method according to claim 2, characterized in that, The step of determining the fault protection level corresponding to the target cell based on the equalization time interval and the voltage equalization time includes: If the voltage equalization time is within the first time interval, the protection level of the target battery cell is determined to be Level 1 protection. If the voltage equalization time is within the second time interval, the protection level of the target battery cell is determined to be Level 2 protection. If the voltage equalization time is within the third time interval, the protection level of the target battery cell is determined to be Level 3 protection. The values ​​in the first time interval are less than the values ​​in the second time interval; the values ​​in the second time interval are less than the values ​​in the third time interval.

4. The method according to claim 3, characterized in that, Adjusting the output capability of the target battery cell based on the fault protection level includes: When the fault protection level is Level 1, the DC-DC converter is controlled by the artificial intelligence controller to output at full-channel rated state. When the fault protection level is level two, the artificial intelligence controller controls the DC-DC converter to switch to the backup channel for output. When the fault protection level is Level 3, the artificial intelligence controller controls the DC converter to start the emergency power supply for output.

5. The method according to claim 1, characterized in that, The acquisition of cell voltage data corresponding to the power battery of the target vehicle includes: Each battery cell corresponding to the power battery of the target vehicle is identified, and a data sampling circuit corresponding to each battery cell is identified, wherein an artificial intelligence controller and a DC-DC converter are provided on the data sampling circuit; The data sampling circuit collects cell voltage data corresponding to each battery cell.

6. The method according to claim 1, characterized in that, The step of determining the target battery cell based on the battery cell voltage data includes: The average voltage value corresponding to the power battery of the target vehicle is determined based on the cell voltage data. Determine the voltage difference data between the cell voltage data and the average voltage value; If the voltage difference data is greater than a preset voltage threshold, the battery cell corresponding to the cell voltage data will be used as the target cell.

7. The method according to claim 6, characterized in that, Voltage equalization of the target battery cell includes: When the target battery cell is a high-voltage battery cell, the DC-DC converter is controlled by an artificial intelligence controller to supply power to the on-board equipment of the target vehicle. When the target cell is a low-voltage cell, the DC-DC converter is controlled by an artificial intelligence controller to draw current from a healthy cell and inject it into the target cell.

8. A cell control device for a vehicle battery system, characterized in that, include: The data acquisition module is used to acquire cell voltage data corresponding to the power battery of the target vehicle, and to determine the target cell based on the cell voltage data. A voltage equalization module is used to perform voltage equalization on the target battery cell and obtain the voltage equalization duration corresponding to the target battery cell. The fault adjustment module is used to determine the fault protection level corresponding to the target cell based on the voltage equalization duration, and adjust the output capability of the target cell based on the fault protection level.

9. A vehicle, characterized in that, The vehicle is equipped with: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program that can be executed by the at least one processor, the computer program being executed by the at least one processor to enable the at least one processor to perform the cell control method of the vehicle battery system according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions that, when executed by a processor, implement the cell control method of the vehicle battery system according to any one of claims 1-7.

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