Method and device for confirming number of battery packs in battery system, battery system, readable storage medium and program product

Abstract

The invention relates to a method and device for confirming the number of battery packs in a battery system, the battery system, a computer readable storage medium and a computer program product. The method comprises the following steps: identifying a bus voltage of an accessed target battery system; the reference voltage of a single battery pack in the target battery system is obtained, and the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells contained in the battery pack in the state of the lowest residual electric quantity; determining a voltage ratio of the bus voltage to the reference voltage; and rounding the voltage ratio to obtain the number of battery packs in the target battery system. According to the method, the total bus voltage of the static battery system is directly identified, and then the number of the stacked battery packs in the system is determined through the ratio of the bus voltage to the reference voltage, so that the identification of the number of the battery packs can be realized without charging processing, and the efficiency of the battery pack number identification processing process can be effectively improved.

Description

Technical Field

[0001] The present application relates to the field of energy storage technology, and in particular to a method, device, battery system, computer-readable storage medium and computer program product for confirming the number of battery packs in a battery system. Background Art

[0002] With the development of energy storage technology and battery technology, lithium iron phosphate battery technology has emerged. Lithium iron phosphate battery is a lithium-ion battery that uses lithium iron phosphate (LiFePO4) as the positive electrode material and carbon as the negative electrode material. During the charging process, some lithium ions in lithium iron phosphate are released, transferred to the negative electrode through the electrolyte, and embedded in the negative electrode carbon material; at the same time, electrons are released from the positive electrode and reach the negative electrode from the external circuit to maintain the balance of the chemical reaction. During the discharge process, lithium ions are released from the negative electrode and reach the positive electrode through the electrolyte. At the same time, the negative electrode releases electrons and reaches the positive electrode from the external circuit to provide energy to the outside world. Lithium iron phosphate batteries have the advantages of high operating voltage, high energy density, long cycle life, good safety performance, low self-discharge rate, and no memory effect.

[0003] At present, the cells of household storage high-voltage stacked battery systems all use lithium iron phosphate batteries. The power range of this battery system is 5kWh to 30kWh, and the power usage range is generally between 5% and 100%. The voltage range of the battery system is 80V to 700V, corresponding to the number of battery cells in series is about 25 to 200 strings. The number of battery packs stacked in series in a general battery system is between 1 and 5. The battery system generally consists of two major parts: a high-voltage box and a battery pack. After the battery system is assembled, its internal BMS (battery management system) needs to identify the number of stacked battery packs in the battery system and obtain the number of battery cells in series when in use, so as to formulate the corresponding control strategy.

[0004] At present, the method for determining the number of battery packs in a battery system generally requires charging the battery pack first until the voltage of the battery pack reaches the charging cut-off voltage, and then confirming the number of battery packs in the battery pack by the voltage change after the battery pack is charged. However, this method requires a long charging process, resulting in poor recognition efficiency. Summary of the invention

[0005] Based on this, it is necessary to provide a method, device, battery system, computer-readable storage medium and computer program product for confirming the number of battery packs in a battery system, which can effectively improve the efficiency of identifying the number of battery packs in the battery system, in order to address the above technical problems.

[0006] In a first aspect, the present application provides a method for confirming the number of battery packs in a battery system, comprising:

[0007] Identify the bus voltage of the target battery system to be connected;

[0008] Obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells included in the battery pack when the battery pack has the lowest remaining power;

[0009] Determining a voltage ratio of the bus voltage to the reference voltage;

[0010] The voltage ratio is rounded to obtain the number of battery packs in the target battery system.

[0011] In one embodiment, the method further comprises:

[0012] Based on the determined number of battery packs, the battery cell strings in the target battery system are numbered to obtain a battery pack numbering result.

[0013] In one embodiment, the battery pack numbering result includes a physical address of a battery cell string;

[0014] The step of numbering the battery packs in the target battery system based on the determined number of battery packs to obtain the battery pack numbering result includes:

[0015] Determining the number of battery cell strings in the battery system based on the determined number of battery packs;

[0016] Based on the number of cell strings, the cell strings corresponding to the total negative of the target battery system are used as the starting number, and the cell strings corresponding to the total positive of the target battery system are used as the ending number. The cell strings in each battery pack are numbered to obtain the physical addresses of each cell string in the target battery system.

[0017] In one embodiment, the method further comprises:

[0018] Collecting battery operating data of each battery pack in the target battery system during the charging and discharging process;

[0019] Identifying an abnormal battery pack based on the battery operating data;

[0020] Performing warning generation processing according to the battery operating data to obtain battery status warning information of the abnormal battery pack;

[0021] Push the battery status warning information.

[0022] In one embodiment, the method further comprises:

[0023] Establishing a battery working file corresponding to each battery pack in the target battery system;

[0024] Based on the collection time of the battery operation data, the battery operation data is saved in a corresponding battery operation file.

[0025] In one of the embodiments, the battery packs in the target battery system are combined in a stacked series manner, and the battery cells of the battery packs include lithium iron phosphate cells.

[0026] In a second aspect, the present application also provides a device for confirming the number of battery packs in a battery system, comprising:

[0027] A bus voltage identification module, used to identify the bus voltage of the connected target battery system;

[0028] A reference voltage acquisition module, used to acquire a reference voltage of a single battery pack in the target battery system, wherein the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells contained in the battery pack under the lowest remaining power state;

[0029] A ratio identification module, used to determine a voltage ratio between the bus voltage and the reference voltage;

[0030] The battery pack confirmation module is used to round the voltage ratio to obtain the number of battery packs in the target battery system.

[0031] In a third aspect, the present application further provides a battery system, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0032] Identify the bus voltage of the target battery system to be connected;

[0033] Obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells included in the battery pack when the battery pack has the lowest remaining power;

[0034] Determining a voltage ratio of the bus voltage to the reference voltage;

[0035] The voltage ratio is rounded to obtain the number of battery packs in the target battery system.

[0036] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0037] Identify the bus voltage of the target battery system to be connected;

[0038] Obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells included in the battery pack when the battery pack has the lowest remaining power;

[0039] Determining a voltage ratio of the bus voltage to the reference voltage;

[0040] The voltage ratio is rounded to obtain the number of battery packs in the target battery system.

[0041] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0042] Identify the bus voltage of the target battery system to be connected;

[0043] Obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells included in the battery pack when the battery pack has the lowest remaining power;

[0044] Determining a voltage ratio of the bus voltage to the reference voltage;

[0045] The voltage ratio is rounded to obtain the number of battery packs in the target battery system.

[0046] The above-mentioned method, device, battery system, computer-readable storage medium and computer program product for confirming the number of battery packs in the battery system, after connecting to the target battery system, identify the bus voltage of the connected target battery system; obtain the reference voltage of a single battery pack in the target battery system, the reference voltage being the product of the preset static voltage corresponding to a single cell in the battery pack under the lowest remaining power state and the number of cells contained in the battery pack; and determine the voltage ratio of the bus voltage to the reference voltage; round the voltage ratio to obtain the number of battery packs in the target battery system. The present application directly identifies the total bus voltage of the static battery system, and then determines the number of stacked battery packs in the system by the ratio of the bus voltage to the reference voltage, thereby realizing the identification of the number of battery packs without the need for charging processing, which can effectively improve the efficiency of the battery pack quantity identification process. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1 A diagram showing an application environment of a method for confirming the number of battery packs in a battery system in one embodiment;

[0049] Figure 2 A schematic diagram of a flow chart of a method for confirming the number of battery packs in a battery system in one embodiment;

[0050] Figure 3 A flowchart of the steps of generating and pushing warning information in one embodiment;

[0051] Figure 4 A schematic diagram of a flow chart of a method for confirming the number of battery packs in a battery system in another embodiment;

[0052] Figure 5 It is a structural block diagram of a device for confirming the number of battery packs in a battery system in one embodiment;

[0053] Figure 6 FIG. 4 is a diagram showing the internal structure of a battery system in one embodiment. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0055] Technical terms involved in this application:

[0056] BMS (Battery Management System) is the core of the battery system, which is responsible for monitoring, managing and protecting the battery pack. BMS usually consists of multiple components, including battery safety unit (BSU), battery master unit (BMU), etc.

[0057] The BSU (Battery Safety Unit) is a critical component that is responsible for monitoring the battery's safety status and taking appropriate measures to prevent the battery from experiencing dangerous conditions. The following is a detailed explanation of the BSU in the battery:

[0058] 1. Functions of BSU

[0059] 1. Safety monitoring: BSU continuously monitors key safety parameters of the battery, such as voltage, current, temperature, and internal pressure. These parameters are important bases for judging whether the battery is in a safe state.

[0060] 2. Fault detection and diagnosis: By collecting and analyzing these parameters in real time, BSU can promptly detect potential safety risks. When abnormal parameters are detected, BSU will quickly perform fault detection and diagnosis to determine whether the battery has overcharge, over-discharge, overheating, internal short circuit and other faults.

[0061] 3. Protection measures: Once a fault is detected, the BSU will immediately take appropriate measures to prevent the fault from expanding or causing more serious consequences. This usually includes cutting off the connection between the battery and the external circuit, starting the battery's internal protection mechanism (such as heat dissipation, exhaust, etc.), and sending fault information to the BMS main controller or other related components so that the system can respond quickly.

[0062] Battery Management Unit (BMU): In electric vehicles, hybrid vehicles and some portable electronic devices, the BMU is responsible for monitoring the battery status, including the battery voltage, current, temperature and remaining power, to ensure the safety, efficiency and long-term use of the battery.

[0063] The method for confirming the number of battery packs in a battery system provided in the embodiment of the present application can be applied to Figure 1 In the application environment shown. Among them, the controller 102 of the battery management system (BMS) can be connected to the target battery system 104 and connected to the battery pack in the battery system, so as to complete the management of the target battery system. The battery management system is also integrated with a data storage system. After the target battery system is connected to the battery management system, the battery management system needs to identify the number of battery packs in the target battery system and perform address allocation and other processing to facilitate the management of each battery in the target battery system. The controller 102 first identifies the bus voltage of the connected target battery system; obtains the reference voltage of a single battery pack in the target battery system, the reference voltage being the product of the preset static voltage corresponding to a single battery cell in the battery pack under the lowest remaining power state and the number of battery cells contained in the battery pack; determines the voltage ratio of the bus voltage to the reference voltage; rounds the voltage ratio to obtain the number of battery packs in the target battery system.

[0064] In an exemplary embodiment, Figure 2 As shown, a method for confirming the number of battery packs in a battery system is provided, and the method is applied to Figure 1 The controller 102 in FIG. 1 is taken as an example to illustrate the method, which includes the following steps 201 to 207. Among them:

[0065] Step 201, identifying the bus voltage of the connected target battery system.

[0066] Step 203, obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack under the lowest remaining power state and the number of battery cells included in the battery pack.

[0067] Among them, the target battery system is a battery system in which the number of battery packs needs to be confirmed in this application, and the target battery system 104 is connected to the controller 102 to realize battery management and monitoring through the controller 102. The target battery system contains multiple battery packs stacked in series, and the bus voltage is the total voltage of these battery packs stacked in series. The bus voltage is measured by a voltage measuring device connected to the controller to the connected target battery system. The reference voltage refers to the product of the preset static voltage corresponding to a single cell in the battery pack and the number of cells contained in the battery pack under the lowest remaining power state. Among them, for the lowest remaining power (State of Charge, SOC), the SOC (power state of charge) usage range of the battery system is 5% to 100% (the SOC usage range of household energy storage products on the market is within 5% to 100%), so the lowest remaining power state generally refers to the state of 5% remaining power. As for the preset static voltage corresponding to a single battery cell, the voltage is different for different types of batteries. For example, for lithium iron phosphate batteries, the basic characteristic is that the static voltage of the battery cell corresponding to 5% SOC is greater than 3V, and the static voltage of the battery cell corresponding to 100% SOC is less than 3.5V. Here, taking the preset static voltage corresponding to a single battery cell as 3V as an example, if the number of battery cells connected in series in the battery pack is 32, the reference voltage of a single battery pack is 32*3=96V.

[0068] Exemplarily, the present application is specifically applied to identify the specific number of battery packs in a battery system. The battery system generally contains multiple battery packs. In the initialization stage of the battery management system, the controller of the battery management system needs to be connected to the system and connected to the battery packs in the battery system. For example, when the battery system is shipped, it is generally divided into two major components, namely the high-voltage box and the battery pack, and the installation method is stacked installation. Based on demand, users can choose to purchase one or more battery packs. In this way, when the system is stacked, the battery management system inside the high-voltage box cannot directly confirm the number of battery packs stacked by the battery system and the physical location of each battery pack, so the battery management strategy of the entire system cannot be carried out. At this time, the battery pack quantity confirmation method of the present application can be used to process by measuring the bus voltage of the access system. First, the controller 102 of the battery management system will collect the bus voltage of the connected target battery system based on the voltage sampling module in the system. The voltage sampling module can transmit the collected voltage to the controller 102 in the form of a digital signal through analog-to-digital conversion. Then the battery management system will obtain the reference voltage of a single battery pack in the target battery system. In a specific embodiment, the reference voltage can be input by the operator based on the specific battery type, or the reference voltages corresponding to multiple battery packs can be pre-stored in the controller 102, and then the operator selects the type of battery pack to be connected. The reference voltage is specifically determined by the product of the preset static voltage corresponding to a single battery cell in the battery pack under the lowest remaining power state and the number of battery cells contained in the battery pack. Therefore, for different types of battery packs, the reference voltage can be measured in advance. In addition, a default reference voltage can also be pre-stored, and when identifying the number of battery packs, identification and confirmation can also be performed directly based on the default reference voltage.

[0069] Step 205, determining the voltage ratio of the bus voltage to the reference voltage.

[0070] Step 207, rounding the voltage ratio to obtain the number of battery packs in the target battery system.

[0071] Exemplarily, the applicant has found that for a battery system, the number of battery packs stacked in the battery system can be determined by the voltage ratio of the bus voltage to the reference voltage. For the current battery system, it specifically includes a high-voltage box and several battery packs, and the actual number of battery packs ranges from 1 to 5. Actual users can choose to purchase / install 1 to 5 battery packs according to their needs. For example, if the power of each battery pack is about 5kWh, the power of the battery system is about 5kWh to 25kWh, thereby meeting the functional requirements of household energy storage. The battery packs are stacked in series and finally connected to the high-voltage box. Therefore, after determining the bus voltage and the reference voltage. By determining the voltage ratio of the bus voltage to the reference voltage; and rounding the voltage ratio, the number of battery packs in the target battery system is obtained.

[0072] In a specific embodiment, the battery cells in the battery pack are lithium iron phosphate cells, and a single battery pack contains 32 cells, and the series-parallel connection method is 1 in parallel and 32 in series. The series-parallel connection method of the battery system containing 2 battery packs is 1 in parallel and 64 in series; the series-parallel connection method of the battery system containing 3 battery packs is 1 in parallel and 96 in series; the series-parallel connection method of the battery system containing 4 battery packs is 1 in parallel and 128 in series; the series-parallel connection method of the battery system containing 5 battery packs is 1 in parallel and 160 in series. For the lithium iron phosphate battery cell, the static voltage of the battery cell corresponding to 5% SOC is greater than 3V, and the static voltage of the battery cell corresponding to 100% SOC is less than 3.5V. At this time, for this scenario, the statistical table of the number of battery packs can refer to the following Table 1.

[0073] Table 1: Statistics of battery pack quantity confirmation in battery system

[0074]

[0075] As can be seen from the above figure, for the battery pack stacking and series connection of lithium iron phosphate cells, the present application can efficiently identify the number of battery packs connected to the battery system.

[0076] The method for confirming the number of battery packs in the above-mentioned battery system is to identify the bus voltage of the connected target battery system after connecting to the target battery system; obtain the reference voltage of a single battery pack in the target battery system, the reference voltage being the product of the preset static voltage corresponding to a single cell in the battery pack under the lowest remaining power state and the number of cells contained in the battery pack; and determine the voltage ratio of the bus voltage to the reference voltage; and round the voltage ratio to obtain the number of battery packs in the target battery system. The present application directly identifies the total bus voltage of the static battery system, and then determines the number of stacked battery packs in the system by the ratio of the bus voltage to the reference voltage, thereby realizing the identification of the number of battery packs without the need for charging processing, which can effectively improve the efficiency of the battery pack quantity identification process.

[0077] At the same time, the method of the present application confirms the number of stacked battery packs through the bus voltage of the battery system, eliminating the use of the control board / BMS slave board in the battery pack in the traditional solution, thereby significantly reducing costs, shortening the development cycle, and reducing the size of the battery pack accordingly. The function of the controller / dip switch in the traditional solution can be reduced, thereby improving the efficiency of the production line and increasing production capacity. The present application can automatically confirm the number of battery packs in the system without human intervention, thereby improving customer experience.

[0078] In an exemplary embodiment, the present application also includes: based on the determined number of battery packs, numbering the battery cell strings in the target battery system to obtain a battery pack numbering result.

[0079] Exemplarily, after the number of battery packs is confirmed, the battery management system can further obtain the number of battery cells in series after identifying the number of battery packs stacked in the battery system, so as to formulate the corresponding control strategy. For the convenience of management, it is also necessary to number the battery cell strings in the target battery system to distinguish these battery cell strings. In a specific embodiment, the battery cell strings of the battery pack can be numbered in the form of physical addresses. First, the number of battery cell strings in the battery system can be determined based on the determined number of battery packs, and then the numbering is performed based on the determined number of battery packs, with the battery cell string corresponding to the total negative of the target battery system as the starting number, and the battery cell string corresponding to the total positive of the target battery system as the ending number, and the battery cell string in each battery pack is numbered to obtain the physical address of each battery cell string in the target battery system. Thus, corresponding physical addresses are assigned to all battery cell strings in the entire battery system for subsequent management of the battery cell strings. In this embodiment, after the number of battery packs is confirmed, the battery cell strings are numbered from total negative to total positive, and the physical addresses of each battery cell string are assigned, so as to effectively ensure the efficiency of battery cell string management.

[0080] In an exemplary embodiment, Figure 3 As shown, the method also includes:

[0081] Step 302: Collect battery operating data of each battery pack in the target battery system during the charging and discharging process.

[0082] Step 304 , identifying abnormal battery packs based on the battery operating data.

[0083] Step 306 , performing warning generation processing according to the battery operating data to obtain battery status warning information of the abnormal battery pack.

[0084] Step 308: Push battery status warning information.

[0085] Exemplarily, when the number of battery packs is identified and the physical addresses of the battery cell strings in the battery pack are assigned, the battery can be managed during the charging and discharging process of the battery pack. The battery management system is a key device for managing, monitoring and protecting batteries. It is the "brain" of the battery system. It can monitor the status of the battery in real time, including voltage, current, temperature, SOC (battery state of charge) and other information, and reasonably control the charging, discharging, balancing and protection of the battery according to the characteristics and use conditions of the battery to ensure the safety, efficiency and long life of the battery. In the specific application process, the battery management system will collect the battery working data of the battery pack during the charging and discharging process, and identify abnormal battery packs based on the battery working data, such as identifying abnormal battery packs that are overcharged or over-discharged. After identifying the abnormal battery packs, the warning generation process can be performed according to the battery working data corresponding to these abnormal battery packs. And the generated battery status warning information is pushed to the user. The user can confirm the battery status according to the warning information and decide whether to maintain the battery to ensure the safety of the device. In a specific embodiment, the alarm generation and push processing can be realized by the battery safety unit (BSU) in the battery system. In addition, the battery management system can also record the battery working status and establish a battery working file corresponding to each battery pack in the target battery system; based on the collection time of the battery working data, the battery working data is saved to the corresponding battery working file, so as to obtain the timing data of the battery working process, and the battery historical data analysis and other processing can be completed based on these timing data. At the same time, by collecting these historical working data, it is possible to provide information for further optimization and development of new electrical appliances, chargers, motors, etc., and provide a basis for offline analysis of battery system failures. In this embodiment, warnings are sent by collecting the battery's charging and discharging working information to ensure the high availability of the battery system. After a battery failure occurs, an alarm can be issued in a timely manner. At the same time, by collecting the data of the battery working process and storing it in the working file, it effectively provides a data basis for the subsequent development and maintenance of batteries and related equipment.

[0086] In a specific embodiment, the method for confirming the number of battery packs in the battery system of the present application can refer to Figure 4As shown, the battery management system BMS is set in the high-voltage box, and the high-voltage box is connected to multiple battery packs. The battery management system BMS is used to manage these battery packs. After the system is assembled, the BMS first performs bus voltage detection to determine the bus voltage connected to the system after the current assembly is completed. At the same time, it can be determined that the reference voltage of a single battery pack in the battery system is the number of cells 32*the preset static voltage of a single cell 3=96, and then the bus voltage is divided by 96 to obtain a decimal ratio X.YY. After rounding it, it can be confirmed that the number of stacked battery packs is X. Then start numbering from the total negative (negative pole) of the battery system, with the total negative being the first string until the total positive being the last string, and the physical address of each string of cells in the battery system is obtained accordingly.

[0087] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments may include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0088] Based on the same inventive concept, the embodiment of the present application also provides a battery pack quantity confirmation device in a battery system for implementing the battery pack quantity confirmation method in the battery system involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more embodiments of the battery pack quantity confirmation device in the battery system provided below can refer to the limitations of the battery pack quantity confirmation method in the battery system above, and will not be repeated here.

[0089] In an exemplary embodiment, Figure 5 As shown, a device for confirming the number of battery packs in a battery system is provided, comprising:

[0090] The bus voltage identification module 502 is used to identify the bus voltage of the connected target battery system.

[0091] The reference voltage acquisition module 504 is used to obtain the reference voltage of a single battery pack in the target battery system. The reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells contained in the battery pack when the battery pack is in the lowest remaining power state.

[0092] The ratio identification module 506 is used to determine the voltage ratio of the bus voltage to the reference voltage.

[0093] The battery pack confirmation module 508 is used to round the voltage ratio to obtain the number of battery packs in the target battery system.

[0094] The battery pack quantity confirmation device in the above-mentioned battery system, after connecting to the target battery system, identifies the bus voltage of the connected target battery system; obtains the reference voltage of a single battery pack in the target battery system, the reference voltage being the product of the preset static voltage corresponding to a single cell in the battery pack under the lowest remaining power state and the number of cells contained in the battery pack; and determines the voltage ratio of the bus voltage to the reference voltage; rounds the voltage ratio to obtain the number of battery packs in the target battery system. The present application directly identifies the total bus voltage of the static battery system, and then determines the number of stacked battery packs in the system by the ratio of the bus voltage to the reference voltage, thereby realizing the identification of the number of battery packs without charging processing, which can effectively improve the efficiency of the battery pack quantity identification process.

[0095] In one embodiment, a numbering processing module is further included, which is used to: based on the determined number of battery packs, perform numbering processing on the battery cell strings in the target battery system to obtain the battery pack numbering result.

[0096] In one embodiment, the battery pack numbering result includes the physical address of the battery cell string, and the numbering processing module is specifically used to: determine the number of battery cell strings in the battery system based on the determined number of battery packs; based on the number of battery cell strings, take the battery cell string corresponding to the total negative of the target battery system as the starting number, and the battery cell string corresponding to the total positive of the target battery system as the ending number, number the battery cell strings in each battery pack to obtain the physical address of each battery cell string in the target battery system.

[0097] In one embodiment, it also includes a warning generation module, which is used to: collect battery operating data of each battery pack in the target battery system during the charging and discharging process; identify abnormal battery packs based on the battery operating data; perform warning generation processing based on the battery operating data to obtain battery status warning information of the abnormal battery pack; and push the battery status warning information.

[0098] In one embodiment, it also includes a data storage module for: establishing a battery working file corresponding to each battery pack in the target battery system; and saving the battery working data to the corresponding battery working file based on the collection time of the battery working data.

[0099] In one embodiment, the battery packs in the target battery system are combined in a stacked series manner, and the battery cells of the battery packs include lithium iron phosphate cells.

[0100] Each module in the battery pack quantity confirmation device in the above-mentioned battery system can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the battery system in the form of hardware, or can be stored in the memory in the battery system in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0101] In an exemplary embodiment, a battery system is provided, the internal structure of which can be shown as follows: Figure 6 As shown. The battery system includes a processor, a memory, an input / output interface, a communication interface, a display unit, an input device and a battery pack. Among them, the processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. Among them, the processor of the battery system is used to provide computing and control capabilities. The memory of the battery system includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the battery system is used to exchange information between the processor and an external device. The communication interface of the battery system is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (Near Field Communication, NFC) or other technologies. When the computer program is executed by the processor, a method for confirming the number of battery packs in a battery system is implemented. The display unit of the battery system is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the battery system can be a touch layer covering the display screen, or a button, trackball or touchpad set on the battery system shell, or an external keyboard, touchpad or mouse.

[0102] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a partial structure related to the scheme of the present application, and does not constitute a limitation on the battery system to which the scheme of the present application is applied. The specific battery system may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0103] In one embodiment, a battery system is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0104] In one embodiment, a computer-readable storage medium is provided, storing a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0105] In one embodiment, a computer program product or computer program is provided, the computer program product or computer program includes computer instructions, the computer instructions are stored in a computer-readable storage medium. A processor of a battery system reads the computer instructions from the computer-readable storage medium, and the processor executes the computer instructions, so that the battery system performs the steps in the above-mentioned method embodiments.

[0106] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0107] Those of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0108] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0109] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for confirming the number of battery packs in a battery system, characterized in that: The method comprises: Identify the bus voltage of the target battery system to be connected; Obtaining a reference voltage of a single battery pack in the target battery system, where the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells included in the battery pack when the battery pack has the lowest remaining power; determining a voltage ratio of the bus voltage to the reference voltage; The voltage ratio is rounded to obtain the number of battery packs in the target battery system.

2. The method according to claim 1, characterized in that: The method further comprises: Based on the determined number of battery packs, the battery cell strings in the target battery system are numbered to obtain a battery pack numbering result.

3. The method according to claim 2, characterized in that The battery pack numbering result includes the physical address of the battery cell string; The step of numbering the battery packs in the target battery system based on the determined number of battery packs to obtain the battery pack numbering result includes: Determining the number of battery cell strings in the battery system based on the determined number of battery packs; Based on the number of cell strings, the cell strings corresponding to the total negative of the target battery system are used as the starting number, and the cell strings corresponding to the total positive of the target battery system are used as the ending number. The cell strings in each battery pack are numbered to obtain the physical addresses of each cell string in the target battery system.

4. The method according to claim 1, characterized in that: The method further comprises: Collecting battery operating data of each battery pack in the target battery system during the charging and discharging process; Identifying an abnormal battery pack based on the battery operating data; Performing warning generation processing according to the battery operating data to obtain battery status warning information of the abnormal battery pack; Push the battery status warning information.

5. The method according to claim 4, characterized in that The method further comprises: Establishing a battery working file corresponding to each battery pack in the target battery system; Based on the collection time of the battery operation data, the battery operation data is saved in a corresponding battery operation file.

6. The method according to any one of claims 1 to 5, characterized in that: The battery packs in the target battery system are combined in a stacked series manner, and the battery cells of the battery packs include lithium iron phosphate cells.

7. A device for confirming the number of battery packs in a battery system, characterized in that: The device comprises: A bus voltage identification module, used to identify the bus voltage of the connected target battery system; A reference voltage acquisition module, used to acquire a reference voltage of a single battery pack in the target battery system, wherein the reference voltage is the product of a preset static voltage corresponding to a single battery cell in the battery pack and the number of battery cells contained in the battery pack under the lowest remaining power state; A ratio identification module, used to determine a voltage ratio between the bus voltage and the reference voltage; The battery pack confirmation module is used to round the voltage ratio to obtain the number of battery packs in the target battery system.

8. A battery system comprising a memory, a processor and a battery pack, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 6 are implemented.

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

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

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