Distributed battery pack, vehicle, battery management method and device for vehicle, and medium

Abstract

A distributed battery pack, a vehicle, a battery management method and device for the vehicle, and a medium, relating to the technical field of vehicle batteries. The distributed battery pack (301) comprises a first battery pack (101) for free use of a user and a second battery pack (102) needing to be paid by the user; and a battery management unit (103) separately connected to the first battery pack (101) and the second battery pack (102), wherein each battery pack comprises at least one cell. The battery pack comprises a first battery pack (101) for free use of a user and a second battery pack (102) needing to be paid by the user, so that the number of times for the user to use the second battery pack (102) is reduced, thereby reducing the number of times of excessive charging and discharging of the distributed battery pack (301), and thus improving the battery safety.

Description

Distributed battery pack, vehicle, vehicle battery management method, device and medium

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on March 15, 2024, with application number 202410300020.4 and application name “Distributed battery pack, vehicle, battery management method, device and medium for vehicle”, the entire contents of which are incorporated by reference into this application. Technical Field

[0002] The embodiments of the present application relate to, but are not limited to, the field of vehicle battery technology, and specifically relate to a distributed battery pack, a vehicle, and a battery management method, device, and medium for a vehicle. Background Art

[0003] With the development of science and technology and people's demand for environmental protection, electric vehicles have attracted more and more attention. Electric vehicles are equipped with batteries, which power the motors and other electrical components in the electric vehicles to ensure the normal operation of the electric vehicles.

[0004] Users may have the habit of overcharging or over-discharging batteries. Overcharging and discharging batteries will increase the rate of battery loss and shorten the battery life. It will also increase the risk of battery spontaneous combustion, that is, thermal runaway of the battery, resulting in lower battery safety. Summary of the Invention

[0005] The following is a summary of the subject matter described in detail herein. This summary is not intended to limit the scope of the claims.

[0006] The present application provides a distributed battery pack, a vehicle, a battery management method, an apparatus, and a medium for the vehicle. By dividing the battery packs in the battery pack into a first battery pack for free use and a second battery pack for which the user has to pay, the number of times the user uses the second battery pack is reduced, thereby reducing the number of times the distributed battery pack is overcharged and discharged, thereby improving battery safety.

[0007] In a first aspect, the present application provides a distributed battery pack, comprising:

[0008] A first battery pack for free use by the user and a second battery pack for which the user must pay;

[0009] a battery management unit connected to the first battery pack and the second battery pack respectively;

[0010] Each battery pack includes at least one single battery.

[0011] In a possible design of the first aspect, the performance index of the single cells in the first battery pack is higher than the performance index of the single cells in the second battery pack, and the performance index of each single cell is a value measuring battery performance calculated based on the performance parameters of the single cell.

[0012] In a possible design of the first aspect, the performance parameter of each single battery includes at least one of voltage information, resistance information, current information, and temperature information.

[0013] In a possible design of the first aspect, the single cells in the first battery pack and the single cells in the second battery pack are batteries of the same type with the same chemical properties.

[0014] In a possible design of the first aspect, the single cells in the first battery pack and the single cells in the second battery pack are different types of batteries with different chemical properties.

[0015] In a possible design of the first aspect, the single cell is a lithium battery or a lithium iron phosphate battery.

[0016] In a possible design of the first aspect, the single cells in the first battery pack or the second battery pack include at least power batteries or energy batteries.

[0017] In a second aspect, the present application provides a vehicle, wherein the vehicle is provided with the distributed battery pack and control unit as described above;

[0018] The control unit is connected to the battery management unit of the distributed battery pack;

[0019] The control unit is configured to manage a first battery pack for free use by users and a second battery pack for paid use by users according to performance parameters of single batteries in the distributed battery group.

[0020] In a possible design of the second aspect, the control unit includes:

[0021] The performance index calculation module is configured to calculate the performance index of each single cell according to the performance parameters of the single cell;

[0022] The conversion module is configured to convert any single battery in the first battery pack to the second battery pack if the performance indicator of the single battery in the first battery pack is lower than a preset performance indicator threshold.

[0023] In a third aspect, the present application provides a vehicle battery management method, the method comprising:

[0024] Obtaining performance parameters of each single battery in a distributed battery pack of the vehicle, wherein the distributed battery pack includes a first battery pack for free use by users and a second battery pack for paid use by users, and each battery pack includes at least one single battery;

[0025] Calculating a performance index of each single cell based on the performance parameters of each single cell, wherein the performance index is used to measure battery performance;

[0026] Determining whether there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold;

[0027] If a target battery with a performance indicator lower than the preset performance indicator threshold exists in the first battery pack, the target battery is transferred to the second battery pack.

[0028] In a fourth aspect, the present application provides a battery management device for a vehicle, comprising:

[0029] an acquisition module, configured to acquire performance parameters of each single battery in a distributed battery pack of a vehicle, wherein the distributed battery pack includes a first battery pack for free use by a user and a second battery pack for paid use by the user, and each battery pack includes at least one single battery;

[0030] Processing module for:

[0031] Calculating a performance index of each single cell based on the performance parameters of each single cell, wherein the performance index is used to measure battery performance;

[0032] Determining whether there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold;

[0033] The conversion module is configured to convert a target battery having a performance index lower than the preset performance index threshold value into the second battery pack if the target battery exists in the first battery pack.

[0034] In a fifth aspect, the present application provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the vehicle battery management method described in the third aspect.

[0035] In a sixth aspect, the present application provides a computer program product, comprising a computer program, which, when executed by a processor, is used to implement the vehicle battery management method described in the third aspect.

[0036] The distributed battery pack provided in this embodiment can reduce vehicle purchase costs for consumers. The battery pack's individual cells are divided into a first battery pack (free for user use) and a second battery pack (paid for). For short trips or everyday use, consumers can use the free first battery pack and only need to pay for the first pack when purchasing the vehicle. This can reduce vehicle purchase costs for consumers.

[0037] A distributed battery pack provided in an embodiment of the present application can prevent battery virtualization; when the performance of some single cells in the first battery pack deteriorates, the single cells with better performance in the second battery pack are transferred to the first battery pack for use, so that the free first battery pack used by customers in daily life always has single cells with better performance, which can avoid the phenomenon of virtualization during daily use.

[0038] A distributed battery pack provided in an embodiment of the present application can reduce consumers' car use costs; most consumers' electric vehicles only have a small number of long-distance trips each year and require long-life batteries. This application pays for the use of a second battery pack during long-distance trips, which can be used according to the number of times, rather than purchased directly, which can effectively reduce consumers' car use costs.

[0039] Embodiments of the present application provide a distributed battery pack, vehicle, and vehicle battery management method, device, and medium. The distributed battery pack includes a first battery pack for free use and a second battery pack for which users pay; a battery management unit connected to each of the first and second battery packs; and each battery pack includes at least one single battery cell. By dividing the battery packs into the first battery pack for free use and the second battery pack for which users pay, the number of times users use the second battery pack is reduced, thereby reducing the number of overcharges and discharges in the distributed battery pack and improving battery safety.

[0040] Still other aspects will become apparent upon reading and understanding the accompanying drawings and detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] The following is a brief introduction to the drawings of the embodiments of the present application. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0042] FIG1 is a schematic structural diagram of a distributed battery pack provided in this application;

[0043] FIG2 is a schematic structural diagram of a vehicle provided in this application;

[0044] FIG3 is a schematic structural diagram of a control unit provided in this application;

[0045] FIG4 is a flow chart of an embodiment of a vehicle battery management method provided by the present application;

[0046] FIG5 is a schematic structural diagram of an embodiment of a battery management device for a vehicle provided in this application. DETAILED DESCRIPTION

[0047] The following describes the embodiments of the present application through specific examples, and those skilled in the art can easily understand other advantages and effects of the present application from the content disclosed in this specification. The present application can also be implemented or applied through other different specific embodiments, and each detail in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that, in the absence of conflict, the features in the following examples and embodiments can be combined with each other. It should also be understood that the terms used in the examples of the present application are for the purpose of describing specific embodiments, not for the purpose of limiting the scope of protection of the present application. The test methods for which specific conditions are not specified in the following examples are generally based on conventional conditions, or according to the conditions recommended by each manufacturer.

[0048] When numerical ranges are given in the examples, it should be understood that, unless otherwise specified herein, both endpoints of each numerical range and any value between the two endpoints may be used. Unless otherwise defined herein, all technical and scientific terms used herein are consistent with the prior art as known to those skilled in the art and described herein. Any prior art methods, devices, and materials similar or equivalent to those described in the examples herein may also be used to implement the present invention.

[0049] The terms "first", "second", "third", "fourth", etc. (if any) in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequential order. It is understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0050] With the development of science and technology and people's demand for environmental protection, electric vehicles have attracted more and more attention. Electric vehicles are equipped with batteries, which power the motors and other electrical components in the electric vehicles to ensure the normal operation of the electric vehicles.

[0051] Due to users' lack of understanding of battery maintenance characteristics, they often develop the habit of overcharging or over-discharging their batteries. Overcharging and discharging batteries accelerates battery wear and shortens their lifespan. Furthermore, overcharging and discharging can cause excessive energy storage within the battery, increasing the risk of spontaneous combustion. Each charge and discharge cycle causes irreversible damage to the battery, and this damage has a cumulative effect; the more times a charge and discharge cycle occurs, the more significant the impact on battery performance. Many consumers apply their gasoline vehicle habits to electric vehicles and are concerned about the battery's range. These consumers, lacking an understanding of battery maintenance characteristics, may intentionally or unintentionally overcharge or over-discharge their batteries, severely impacting their lifespan and increasing the risk of thermal runaway.

[0052] Based on this, the inventors discovered during their research on battery packs that reducing the frequency of overcharge and discharge can effectively improve battery safety. Therefore, they designed a distributed battery pack consisting of a first battery pack, available free to users, and a second battery pack, available for user payment. During discharge, when the performance of the first battery pack is low, users can pay to use the second battery pack. This payment requirement encourages users to use the second battery pack less frequently, reducing the frequency of overcharge and discharge in the battery pack and improving battery safety. Furthermore, the performance of the individual cells in the first battery pack is higher than that of the cells in the second battery pack, making the second battery pack more susceptible to overcharge and discharge. This reduces the frequency of overcharge and discharge in the second battery pack, improving battery safety. During charging, when the performance of the individual cells in the first battery pack is higher, they are transferred to the second battery pack. To continue charging, users can pay to use the second battery pack. This payment requirement encourages users to use the second battery pack less frequently, reducing the frequency of overcharge and discharge in the battery pack and improving battery safety.

[0053] The following describes the application scenarios of the distributed battery pack provided in this application.

[0054] Exemplarily, a distributed battery pack is installed in an electric vehicle, which includes a first battery pack for free use by the user and a second battery pack that the user needs to pay for use, and the user drives the electric vehicle.

[0055] The vehicle is currently powered by the first battery pack. As the vehicle continues to drive, the performance of the individual cells in the first pack gradually declines. When this decline reaches a certain level, the battery management unit in the distributed battery pack transfers the individual cells to the second battery pack. When the number of cells in the first battery pack is low, the user can pay to use the second battery pack. Therefore, when the user learns that the performance of the first battery pack is low (i.e., the number of cells in the first battery pack is low), in order to avoid paying to use the second battery pack, they choose to charge the battery. This prevents the second battery pack from over-discharging.

[0056] During charging, the battery management unit transfers the cells from the second battery pack to the first battery pack. The cells in the first battery pack are then charged. If a cell in the first battery pack has higher performance, the battery management unit stops charging that cell, locks it, and transfers it to the second battery pack. If the user still wants to charge that cell, they can pay to unlock it, allowing charging to proceed. After the user pays, the battery management unit resumes charging the cell. After charging is complete, the battery management unit transfers the cells from the second battery pack to the first battery pack for subsequent use.

[0057] It should be noted that the above scenario is only an example of an application scenario provided by an embodiment of the present application. The embodiment of the present application does not limit the actual form of each device included in the scenario, nor does it limit the interaction method between devices. In the specific application of the solution, it can be set according to actual needs.

[0058] The technical solution of the present application is described in detail below through specific embodiments. It should be noted that the following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0059] FIG1 is a schematic diagram of the structure of a distributed battery pack provided in this application. As shown in FIG1 , the distributed battery pack includes a first battery pack 101 for free use by users, a second battery pack 102 for paid use by users, and a battery management unit 103;

[0060] The battery management unit 103 is connected to the first battery pack 101 and the second battery pack 102 respectively.

[0061] Each battery pack includes at least one single battery.

[0062] The battery management unit 103 can manage each battery cell in the first battery pack 101 and the second battery pack 102 to determine whether the battery cell belongs to the first battery pack 101 or the second battery pack 102. If there is a battery cell in the first battery pack 101 with a performance indicator exceeding a preset performance indicator threshold, the battery cell can be transferred to the second battery pack 102 to reduce the number of over-discharges.

[0063] Specifically, each single battery has a corresponding identification. The battery management unit 103 can configure the single battery as free or paid use according to the identification, so as to determine whether the single battery belongs to the first battery pack 101 or the second battery pack 102, and complete the conversion process.

[0064] It should be noted that the method for configuring a single cell for free use or paid use can be: each single cell also has a corresponding battery pack identifier. When the corresponding battery pack identifier is 1, it indicates that the single cell is free to use and belongs to the first battery pack 101; when the corresponding battery pack identifier is 2, it indicates that the single cell is paid to use and belongs to the second battery pack 102. When the battery management unit 103 changes the battery pack identifier corresponding to a single cell from 1 to 2, the single cell is configured for paid use and the single cell is transferred from the first battery pack 101 to the second battery pack 102. When the battery management unit 103 changes the battery pack identifier corresponding to a single cell from 2 to 1, the single cell is configured for free use and the single cell is transferred from the second battery pack 102 to the first battery pack 101. The battery pack identifier can also be 0, 3, 4, 5, etc. The embodiment of the present application does not limit the battery pack identifier and can be set according to actual conditions.

[0065] The battery management unit 103 is also configured to lock or unlock the cells in the second battery pack 102. Specifically, when the number of cells in the first battery pack falls below a preset threshold, the battery management unit 103 locks the cells in the second battery pack 102. At this point, the user can choose to pay a fee to use the second battery pack 102 based on actual needs. Once the user pays the fee, the battery management unit 103 immediately unlocks the second battery pack 102, allowing the user to immediately use the second battery pack 102 and continue driving or charging. This locking and unlocking method effectively meets the user's power requirements, thereby improving the user experience.

[0066] It should be noted that the number of single cells in the first battery pack 101 and the second battery pack 102 can be 1, 5, 10, 500, etc. The embodiment of the present application does not limit the number of single cells in the first battery pack 101 and the second battery pack 102, and can be determined according to actual conditions.

[0067] In a possible implementation, the single cells in the first battery pack 101 and the single cells in the second battery pack 102 may be batteries of the same type with the same chemical properties, or batteries of different types with different chemical properties.

[0068] The categories of the single cells in the first battery pack 101 and the second battery pack 102 are also differentiated by chemical properties. The single cells can be lithium batteries or lithium iron phosphate batteries.

[0069] Lithium batteries, with their high energy density and lightweight features, are suitable for electric vehicles with high energy density and weight requirements. Lithium iron phosphate batteries offer greater safety and stability, making them suitable for applications requiring even greater safety.

[0070] Regarding the categories of the single batteries in the first battery pack 101 and the second battery pack 102 , the categories of the single batteries may also be power batteries or energy batteries.

[0071] Compared with energy batteries, power batteries have higher output power per unit time, but store less energy per unit volume or weight, have lower energy density, and have shorter cycle life. Energy batteries store more energy per unit volume or weight, but have relatively lower output power per unit time, have higher energy density, and have longer cycle life.

[0072] By selecting the appropriate chemical properties and types of single cells, distributed battery packs can meet the needs of different vehicles and users, while providing more flexible and diverse energy solutions.

[0073] The embodiments of the present application do not limit the chemical properties or types of the single cells, which can be determined based on actual conditions.

[0074] During charging, the battery management unit 103 configures all single cells for free use, that is, transfers all single cells to the first battery pack 101. Then, the single cells in the first battery pack 101 are charged, and the performance indicators of each single cell are determined. When the performance indicator of a single cell exceeds the charging threshold, the battery management unit 103 locks the single cell, stops charging the single cell, and configures the single cell for paid use, that is, transfers the single cell to the second battery pack 102. If the user still wants to charge the single cell, he can use the payment to unlock the single cell to enable charging of the single cell. After the user pays, the battery management unit 103 unlocks the single cell and continues charging the single cell. After charging is completed, the battery management unit 103 transfers the single cell in the second battery pack 102 to the first battery pack 101.

[0075] The distributed battery pack provided in the embodiment of the present application includes a first battery pack for free use by the user and a second battery pack for which the user has to pay; a battery management unit connected to the first battery pack and the second battery pack respectively; and each battery pack includes at least one single battery cell. By dividing the battery packs in the battery pack into a first battery pack for free use and a second battery pack for which the user has to pay. During the discharge process, when the performance of the first battery pack is low, the user can pay to use the second battery pack. Since the user is required to pay, the user will reduce the number of times the second battery pack is used, thereby reducing the number of times the battery pack is over-discharged, thereby improving the safety of the battery. During the charging process, when the performance of the single battery cells in the first battery pack is high, they are switched to the second battery pack, and the user can pay to use the second battery pack to continue charging. Since the user is required to pay, the user will reduce the number of times the second battery pack is used, thereby reducing the number of times the battery pack is over-charged, thereby improving the safety of the battery.

[0076] The performance indicators of the single cells in the first battery pack and the second battery pack are described below.

[0077] The performance index of the single cells in the first battery pack is higher than the performance index of the single cells in the second battery pack. The performance index of each single cell is a value for measuring battery performance calculated based on the performance parameters of the single cell.

[0078] The performance parameters of each single battery include at least one of voltage information, resistance information, current information and temperature information.

[0079] Battery over-discharge, battery aging, excessively high or low temperatures, and circuit failures can all affect battery performance. The performance index of a single battery can be calculated from at least one of voltage information, resistance information, current information, and temperature information. The performance index can be the inverse of the voltage drop rate, the inverse of the resistance value, the inverse of the current drop rate, the inverse of the battery temperature, etc. The greater the voltage drop rate, the greater the resistance value, the greater the current drop rate, and the higher the battery temperature, the worse the battery performance. The smaller the performance index value, the worse the battery performance. The embodiments of this application do not limit the performance index, and it can be determined according to actual conditions.

[0080] By calculating the performance index through different performance parameters, the performance index can be made more accurate and better reflect the performance of the single cell.

[0081] In the distributed battery pack provided in the present application, the performance indicators of the single cells in the first battery pack are higher than the performance indicators of the single cells in the second battery pack. The second battery pack is more prone to over-discharge. By paying for use, the number of times users use the second battery pack can be reduced, thereby reducing the number of over-discharges and improving battery safety.

[0082] Figure 2 is a schematic diagram of the structure of the vehicle provided in this application. As shown in Figure 2, the vehicle includes a distributed battery pack 301 and a control unit 302. The distributed battery pack 301 includes a first battery pack 101 for free use by users, a second battery pack 102 for paid use by users, and a battery management unit 103; the battery management unit 103 is connected to the first battery pack 101 and the second battery pack 102 respectively; each battery pack includes at least one single battery cell.

[0083] The control unit 302 is connected to the battery management unit 103 of the distributed battery group 301 .

[0084] The control unit 302 is configured to manage the first battery pack 101 for free use by the user and the second battery pack 102 for paid use by the user according to the performance parameters of the single batteries in the distributed battery group 301 .

[0085] Specifically, FIG3 is a schematic structural diagram of the control unit provided in this application. As shown in FIG3 , the control unit includes a performance indicator calculation module and a conversion module.

[0086] The performance index calculation module is configured to calculate the performance index of each single cell according to the performance parameters of each single cell.

[0087] The performance index can be the inverse of the voltage drop rate, the inverse of the resistance value, the inverse of the current drop rate, the inverse of the battery temperature, etc. A greater voltage drop rate, a greater resistance value, a greater current drop rate, and a higher battery temperature all indicate poorer battery performance. The smaller the performance index value, the poorer the battery performance. The embodiments of this application do not limit the performance index, and it can be determined based on actual conditions.

[0088] The conversion module is configured to convert any single battery in the first battery pack to the second battery pack if the performance indicator of the single battery in the first battery pack is lower than a preset performance indicator threshold.

[0089] It should be noted that the performance indicator threshold can be -0.5V / min, -0.6V / min, -0.8V / min, -80 milliohms, -90 milliohms, -100 milliohms, -4A / min, -5A / min, -6A / min, -50℃, -60℃, -70℃, etc. The embodiment of this application does not limit the performance indicator threshold and can be set according to actual conditions.

[0090] For example, a single cell has a performance index of -0.9V / min, a performance index threshold of -0.5V / min, and -0.9 < -0.5, so the single cell is transferred to the second battery pack. A single cell has a performance index of -110 milliohms, a performance index threshold of -90 milliohms, and -110 < -90, so the single cell is transferred to the second battery pack. A single cell has a performance index of -10A / min, a performance index threshold of -6A / min, and -10 < -6, so the single cell is transferred to the second battery pack. A single cell has a performance index of -75°C, a performance index threshold of -70°C, and -75 < -70, so the single cell is transferred to the second battery pack.

[0091] It should be noted that the method for transferring cells from the first battery pack to the second battery pack is as follows: each cell has a corresponding identifier. The control unit sends a transfer instruction to the battery management unit, which includes the identifier of the cell to be transferred. The battery management unit uses the cell identifier in the transfer instruction to configure the cell for paid use, thereby transferring the cell to the second battery pack. The transfer process does not involve any change in the spatial position of the cell.

[0092] When the control unit determines that the number of cells in the first battery pack is less than a preset threshold, it can output payment information, requiring the user to pay before using the second battery pack. While outputting the payment information, it can also send a lock instruction to the battery management unit, which locks the cells in the second battery pack, preventing them from discharging and ensuring battery safety. The preset threshold can be 2, 5, 100, etc. This embodiment of the application does not limit the preset threshold and can be set according to actual circumstances.

[0093] As a viable payment method, the vehicle is equipped with an onboard display terminal connected to the control unit. Payment information is provided in the form of a payment page or a QR code, which the control unit displays on the onboard display terminal. The QR code is scanned by the user to pay for the use of the second battery pack. The user can complete payment on the payment page or by scanning the QR code using a terminal device.

[0094] As another payment method, the control unit sends the payment information to the user's terminal device, and the user completes the payment on the terminal device.

[0095] After the user completes payment, the payment platform receives a confirmation of payment and sends an unlock command to the vehicle's control unit. The control unit then sends the unlock command to the battery management unit, which unlocks the cells in the second battery pack and uses the second pack for power. If the user fails to pay, the battery management unit takes appropriate measures, such as cutting off the power supply, to ensure safe and stable operation of the vehicle.

[0096] During charging, the control unit sends a charging instruction to the battery management unit (BMU), transferring the cells in the second battery pack to the first battery pack, where they are then charged. The control unit then determines the performance indicators of each cell in the first battery pack. When a cell's performance indicator exceeds a charging threshold, the control unit sends a stop-charging instruction to the BMU, which carries the cell's identifier. Based on the cell's identifier, the BMU locks the cell, stops charging it, and transfers it to the second battery pack. If the user still wishes to charge the cell, they can pay to unlock the cell, allowing charging to proceed. After the user pays, the control unit sends a recharge instruction to the BMU, which carries the cell's identifier. The BMU unlocks the cell and resumes charging. After charging is complete, the control unit sends a transfer instruction to the BMU, transferring the cell from the second battery pack to the first battery pack for subsequent use.

[0097] It should be noted that the payment process during charging is similar to the payment process during discharging, and will not be described in detail here.

[0098] The vehicle provided in the present application converts the single cell in the first battery pack into the second battery pack when the performance index of the single cell in the first battery pack is lower than the preset performance index threshold, so that the performance index of the single cell in the first battery pack is higher than the performance index of the single cell in the second battery pack. Since the second battery pack needs to be paid for, the number of times the second battery pack is used can be reduced, thereby reducing the number of times of overcharging and discharging, thereby improving the safety of the battery.

[0099] Figure 4 is a flow chart of an embodiment of the vehicle battery management method provided by this application. The execution subject of this embodiment of the application can be a control unit in the vehicle, or a cloud platform. The cloud platform can be deployed on a server, terminal device, etc. The following is an example of a control unit. The method in this embodiment can be implemented by software, hardware, or a combination of software and hardware. As shown in Figure 4, the vehicle battery management method specifically includes the following steps:

[0100] S401: Obtain performance parameters of each single battery in a distributed battery pack of a vehicle.

[0101] In this step, in order to reduce the number of times the battery pack is overcharged and over-discharged, the performance parameters of each single battery in the distributed battery pack of the vehicle are first obtained.

[0102] The distributed battery pack includes a first battery pack for free use by users and a second battery pack that users need to pay for use. Each battery pack includes at least one single battery. The battery management unit in the distributed battery pack is connected to the first battery pack and the second battery pack respectively.

[0103] Since the control unit is connected to the battery management unit, and the battery management unit is connected to the first battery pack and the second battery pack, the control unit can obtain the performance parameters of each single battery through the battery management unit.

[0104] It should be noted that when the execution entity is a cloud platform, the control unit establishes a wireless communication connection with the cloud platform. After the control unit obtains the performance parameters of each single battery through the battery management unit, it sends the performance parameters to the cloud platform through the wireless communication connection, and the cloud platform can obtain the performance parameters.

[0105] It should be noted that the performance parameters of each single battery include at least one of voltage information, resistance information, current information and temperature information.

[0106] S402: Calculate the performance index of each single cell according to the performance parameters of each single cell.

[0107] In this step, after the control unit obtains the performance parameters of each single cell, in order to determine the performance of each single cell, the control unit calculates the performance index of each single cell based on the performance parameters of each single cell, and the performance index is used to measure the battery performance.

[0108] It should be noted that the performance indicator can be the opposite of the voltage drop rate, the opposite of the resistance value, the opposite of the current drop rate, the opposite of the battery temperature, etc. The embodiment of the present application does not limit the performance indicator and can be determined according to actual conditions.

[0109] It should be noted that the control unit may only obtain the performance parameters of each single battery in the first battery pack, and only calculate the performance index of each single battery in the first battery pack.

[0110] S403: Determine whether there is a target battery in the first battery pack with a performance indicator lower than a preset performance indicator threshold.

[0111] In this step, after calculating the performance index of each single battery, the control unit determines whether there is a target battery in the first battery pack whose performance index is lower than a preset performance index threshold in order to reduce the number of over-discharges.

[0112] S404: If there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold, the target battery is transferred to the second battery pack.

[0113] In this step, if the control unit determines that there is a target battery in the first battery pack whose performance index is lower than the preset performance index threshold, it means that the performance of the target battery is poor and continued use will cause over-discharge, then the target battery will be transferred to the second battery pack.

[0114] The control unit switches the target battery to the second battery by sending a switch instruction to the battery management unit (BMU), including the target battery's identifier, according to the control unit. The BMU then uses the identifier in the switch instruction to configure the target battery for paid use, completing the switch. The switch does not involve any change in the spatial position of the battery.

[0115] It should be noted that when the execution entity is a cloud platform, the cloud platform sends a conversion instruction to the control unit through a wireless communication connection, and the conversion instruction includes the identification of the target battery; the control unit sends the conversion instruction to the battery management unit, and the battery management unit configures the target battery for paid use through the identification of the target battery in the conversion instruction, thereby completing the conversion process.

[0116] When the execution entity is a cloud platform, it helps to remotely manage distributed battery packs, ensure battery safety, and improve vehicle safety and maintenance convenience.

[0117] The battery management method provided in this embodiment calculates the performance index of each single battery cell and switches the target battery to the second battery pack when a target battery in the first battery pack has a performance index lower than a preset performance index threshold. Since the second battery pack is paid for, the number of times the second battery pack is used can be reduced, thereby reducing the number of overcharging and discharging, thereby improving battery safety.

[0118] FIG5 is a schematic diagram of the structure of an embodiment of a battery management device for a vehicle provided by this application. As shown in FIG5 , the battery management device 50 includes:

[0119] an acquisition module 51 for acquiring performance parameters of each single battery in a distributed battery pack of a vehicle, wherein the distributed battery pack includes a first battery pack for free use by a user and a second battery pack for paid use by the user, and each battery pack includes at least one single battery;

[0120] The processing module 52 is configured to:

[0121] Calculating a performance index of each single cell based on the performance parameters of each single cell, wherein the performance index is used to measure battery performance;

[0122] Determining whether there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold;

[0123] The conversion module 53 is configured to convert a target battery having a performance indicator lower than the preset performance indicator threshold into the second battery pack if the target battery exists in the first battery pack.

[0124] The vehicle battery management device provided in this embodiment is used to implement the technical solution in any of the aforementioned method embodiments. Its implementation principles and technical effects are similar and will not be described in detail here.

[0125] An embodiment of the present application further provides a readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the technical solution provided by any of the aforementioned method embodiments.

[0126] An embodiment of the present application also provides a computer program product, including a computer program, which, when executed by a processor, is used to implement the technical solution provided by any of the aforementioned method embodiments.

[0127] Those skilled in the art will appreciate that all or part of the steps in the above method can be completed by instructing relevant hardware (such as a processor) through a program, and the program can be stored in a computer-readable storage medium, such as a read-only memory, a disk or an optical disk. Optionally, all or part of the steps in the above embodiment can also be implemented using one or more integrated circuits. Accordingly, each module / unit in the above embodiment can be implemented in the form of hardware, for example, by implementing its corresponding function through an integrated circuit, or in the form of a software functional module, for example, by executing a program / instruction stored in a memory by a processor to implement its corresponding function. This application is not limited to any particular form of combination of hardware and software.

[0128] Finally, it should be noted that each of the above embodiments is only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to each of the above embodiments, a person skilled in the art should understand that the technical solution described in each of the above embodiments can still be modified, or some or all of the technical features thereof can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of each embodiment of the present application.

Claims

1. A distributed battery pack, comprising: A first battery pack for free use by the user and a second battery pack for which the user must pay; a battery management unit connected to the first battery pack and the second battery pack respectively; Each battery pack includes at least one single battery; The performance index of each single cell is a value for measuring battery performance calculated based on performance parameters of the single cell. The performance parameters of each single cell include at least one of voltage information, resistance information, current information, and temperature information.

2. A vehicle comprising: The distributed battery pack and control unit according to claim 1; The control unit is connected to the battery management unit of the distributed battery pack; The control unit is configured to manage the first battery pack for free use by the user and the second battery pack for paid use by the user according to the performance parameters of the single batteries in the distributed battery pack; Wherein, the control unit includes: The performance index calculation module is configured to calculate the performance index of each single cell according to the performance parameters of the single cell; The conversion module is configured to convert any single battery in the first battery pack to the second battery pack if the performance indicator of the single battery in the first battery pack is lower than a preset performance indicator threshold.

3. A vehicle battery management method, comprising: Obtaining performance parameters of each single battery in a distributed battery pack of the vehicle, wherein the distributed battery pack includes a first battery pack for free use by users and a second battery pack for paid use by users, and each battery pack includes at least one single battery; Calculating a performance index of each single cell based on the performance parameters of each single cell, wherein the performance index is used to measure battery performance; Determining whether there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold; If a target battery with a performance indicator lower than the preset performance indicator threshold exists in the first battery pack, the target battery is transferred to the second battery pack.

4. A battery management device for a vehicle, comprising: an acquisition module, configured to acquire performance parameters of each single battery in a distributed battery pack of a vehicle, wherein the distributed battery pack includes a first battery pack for free use by a user and a second battery pack for paid use by the user, and each battery pack includes at least one single battery; Processing module for: Calculating a performance index of each single cell based on the performance parameters of each single cell, wherein the performance index is used to measure battery performance; Determining whether there is a target battery in the first battery pack whose performance indicator is lower than a preset performance indicator threshold; The conversion module is configured to convert a target battery having a performance index lower than the preset performance index threshold value into the second battery pack if the target battery exists in the first battery pack. 5 . A readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the battery management method for a vehicle according to claim 3 is implemented. 6 . A computer program product comprising a computer program, wherein when the computer program is executed by a processor, the computer program is used to implement the vehicle battery management method according to claim 3 .

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