Distributed battery pack and vehicle

Abstract

The utility model provides a distributed battery pack and a vehicle, and relates to the technical field of vehicle batteries. The distributed battery pack comprises a first battery pack for free use of a user and a second battery pack needing to be paid by the user; the battery management unit is respectively connected with the first battery pack and the second battery pack; and each battery pack comprises at least one single battery. The battery packs in the battery pack are divided into the first battery pack which is used for free and the second battery pack which needs to be paid by the user, so that the number of times of using the second battery pack by the user is reduced, the number of times of excessive charging and discharging of the distributed battery pack is reduced, and the battery safety is improved.

Description

Technical Field

[0001] The present application relates to the field of vehicle battery technology, and in particular to a distributed battery pack and a vehicle. Background Art

[0002] 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 supply power to the motors and other electrical components in the electric vehicles so that the electric vehicles can operate normally.

[0003] In the prior art, because users do not understand the battery maintenance characteristics, they often have the habit of overcharging or over-discharging the battery. Excessive charging and discharging of the battery will increase the battery loss rate, shorten the battery life, and increase the risk of battery spontaneous combustion, that is, thermal runaway of the battery.

[0004] In summary, existing batteries often suffer from over-charging and over-discharging, resulting in lower battery safety. Utility Model Content

[0005] In view of the problems existing in the prior art, the present application provides a distributed battery pack and a vehicle, which are used to solve the problem that the existing batteries are often overcharged and discharged, resulting in low battery safety.

[0006] In a first aspect, the present application provides a distributed battery pack, comprising:

[0007] A first battery pack for free use by the user and a second battery pack for which the user has to pay;

[0008] A battery management unit connected to the first battery pack and the second battery pack respectively;

[0009] Each battery pack includes at least one single battery.

[0010] 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.

[0011] 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.

[0012] 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.

[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 different types of batteries with different chemical properties.

[0014] In a possible design of the first aspect, the single cell is a lithium battery or a lithium iron phosphate battery.

[0015] 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.

[0016] In a second aspect, the present application provides a vehicle, wherein the vehicle is provided with a distributed battery pack and a control unit as described above;

[0017] The control unit is connected to the battery management unit of the distributed battery pack;

[0018] The control unit is used to manage the first battery pack for free use by the user and the second battery pack for which the user needs to pay according to the performance parameters of the single cells in the distributed battery group.

[0019] In a possible design of the second aspect, the control unit includes:

[0020] A performance index calculation module, used to calculate the performance index of each single cell according to the performance parameters of the single cell;

[0021] The conversion module is used to convert any single battery in the first battery pack to the second battery pack if the performance index of the single battery in the first battery pack is lower than a preset performance index threshold.

[0022] In a third aspect, the present application provides a battery management method for a vehicle, the method comprising:

[0023] 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;

[0024] Calculate the performance index of each single cell according to the performance parameters of each single cell, and the performance index is used to measure the battery performance;

[0025] Determine whether there is a target battery in the first battery pack whose performance index is lower than a preset performance index threshold;

[0026] If there is a target battery in the first battery pack whose performance index is lower than the preset performance index threshold, the target battery is transferred to the second battery pack.

[0027] A distributed battery pack provided in an embodiment of the present application can reduce the cost of car purchase for consumers; the single cells in the battery pack are divided into a first battery pack for free use by users and a second battery pack for paid use by users. When used in ordinary short-distance or daily scenarios, consumers can use the free first battery pack and only need to pay for the first battery pack when buying a car. This can reduce the cost of car purchase for consumers.

[0028] A distributed battery pack provided in an embodiment of the present application can prevent battery virtual charge; when the performance of some single cells in a first battery pack deteriorates, the single cells with better performance in a second battery pack are switched 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, thereby avoiding the phenomenon of virtual charge during daily use.

[0029] A distributed battery pack provided in an embodiment of the present application can reduce consumers' vehicle use costs; most consumers' electric vehicles only have a small number of long-distance trips each year and require long-range batteries. The present 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' vehicle use costs.

[0030] The embodiment of the present application provides a distributed battery pack and a vehicle, wherein the distributed battery pack includes a first battery pack for free use by users and a second battery pack for which users have to pay for use; 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. By dividing the battery packs in the battery pack into the first battery pack for free use and the second battery pack for which users have to pay for use, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. 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 paying any creative labor.

[0032] Figure 1 A schematic diagram of the structure of the distributed battery pack provided for this application;

[0033] Figure 2 A schematic diagram of the structure of the vehicle provided for this application;

[0034] Figure 3 A schematic diagram of the structure of the control unit provided for this application;

[0035] Figure 4 A schematic diagram of a process flow of an embodiment of a vehicle battery management method provided in the present application;

[0036] Figure 5 A schematic structural diagram of an embodiment of a battery management device for a vehicle provided in this application. DETAILED DESCRIPTION

[0037] The following describes the embodiments of the present application by 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 by other different specific embodiments, and the details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present application. It should be noted that the features in the following embodiments and the embodiments can be combined with each other without conflict. It should also be understood that the terms used in the embodiments of the present application are to describe specific specific embodiments, rather than to limit the scope of protection of the present application. The test methods for which specific conditions are not indicated in the following examples are usually according to conventional conditions, or according to the conditions recommended by each manufacturer.

[0038] When the embodiments give a numerical range, it should be understood that unless otherwise specified in the present application, both endpoints of each numerical range and any value between the two endpoints can be selected. Unless otherwise defined, all technical and scientific terms used in this application are familiar to those skilled in the art and the records of this application, and any method, device and material of the prior art similar or equivalent to the methods, devices and materials described in the embodiments of this application can also be used to implement this application.

[0039] 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 sequence. It should be understood that the data used in this way can be interchangeable 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 of their variations 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 that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0040] 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 supply power to the motors and other electrical components in the electric vehicles so that the electric vehicles can operate normally.

[0041] In the prior art, because users do not understand the battery maintenance characteristics, they often have the habit of overcharging or over-discharging the battery. Overcharging and discharging the battery will accelerate the battery loss rate and shorten the battery life. In addition, excessive charging and discharging will cause excessive energy stored in the battery, increasing the risk of spontaneous combustion. Each charge and discharge will cause irreversible damage to the battery, and this damage will have a cumulative effect. The more times, the more significant the impact on battery performance. Many consumers apply their usage habits of gasoline vehicles to electric vehicles and are concerned about the battery's range. These consumers lack understanding of the characteristics of battery maintenance and may intentionally or unintentionally overcharge or over-discharge the battery, which seriously affects the battery's service life and increases the risk of thermal runaway.

[0042] In view of the problems existing in the prior art, the inventor found in the process of studying the battery pack that reducing the number of overcharge and discharge can effectively improve the safety of the battery, so a distributed battery pack can be designed, which includes a first battery pack for free use by users and a second battery pack that users need to pay for use. 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 needs to pay, the user will reduce the number of times the second battery pack is used, so that the number of times the battery pack is overcharged and discharged is reduced, and the safety of the battery is improved. In addition, the performance of the single battery in the first battery pack is higher than that of the single battery in the second battery pack, and the second battery pack is more prone to overcharge and discharge, reducing the number of times the second battery pack is used, reducing the number of times overcharge and discharge, and improving the safety of the battery. During the charging process, when the performance of the single battery in the first battery pack is higher, it is converted to the second battery pack. If you want to continue charging, the user can pay to use the second battery pack. Since the user needs to pay, the user will reduce the number of times the second battery pack is used, so that the number of times the battery pack is overcharged and discharged is reduced, and the safety of the battery is improved. Based on the above concept, the distributed battery pack solution in this application is designed.

[0043] The application scenarios of the distributed battery pack provided in this application are described below.

[0044] Exemplarily, a distributed battery pack is installed in an electric vehicle, the distributed battery pack including a first battery pack for free use by a user and a second battery pack for which the user has to pay, and the user drives the electric vehicle.

[0045] The vehicle is currently powered by the first battery pack. As the vehicle continues to travel, the performance of the single cells in the first battery pack gradually decreases. When it decreases to a certain level, the battery management unit in the distributed battery pack switches the single cells to the second battery pack. When the number of single cells in the first battery pack is small, 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, that is, the number of single cells in the first battery pack is small, in order to avoid paying to use the second battery pack, the user chooses to charge the battery, which can avoid excessive discharge of the second battery pack.

[0046] During charging, the battery management unit transfers the single cells in the second battery pack to the first battery pack. Then, the single cells in the first battery pack are charged. When the performance of a single cell in the first battery pack is higher, the battery management unit stops charging the single cell, locks it, and transfers the single cell to the second battery pack. If the user still wants to charge the single cell, he needs to pay to unlock the single cell in order to charge the single cell. After the user pays, the battery management unit continues to charge the single cell. After charging is completed, the battery management unit transfers the single cell in the second battery pack to the first battery pack for subsequent use.

[0047] 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 the various devices included in the scenario, nor does it limit the interaction method between the devices. In the specific application of the solution, it can be set according to actual needs.

[0048] 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.

[0049] Figure 1 The structural diagram of the distributed battery pack provided for this application is as follows: Figure 1 As shown, the distributed battery group 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;

[0050] The battery management unit 103 is connected to the first battery pack 101 and the second battery pack 102 respectively.

[0051] Each battery pack includes at least one single battery.

[0052] The battery management unit 103 can manage each single battery in the first battery pack 101 and the second battery pack 102 to determine whether the single battery belongs to the first battery pack 101 or the second battery pack 102. When there is a single battery with a performance index above a preset performance index threshold in the first battery pack 101, it is necessary to transfer the single battery to the second battery pack 102 to reduce the number of over-discharges.

[0053] Specifically, each single battery has a corresponding identification, and the battery management unit 103 can configure the single battery as free or paid for 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.

[0054] It should be noted that the method of configuring a single cell as free or paid for use may 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 for 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 for 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 converted 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 converted from the second battery pack 102 to the first battery pack 101. The battery pack identifier may 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.

[0055] The battery management unit 103 is also used to lock or unlock the single cells in the second battery pack 102 for use. Specifically, when the number of single cells in the first battery pack is less than a preset threshold, the battery management unit 103 locks the single cells in the second battery pack 102. At this time, the user can choose to pay a fee to use the second battery pack 102 when needed according to actual needs. When the user pays the corresponding fee, the battery management unit 103 will immediately unlock the second battery pack 102, allowing the user to use the second battery pack 102 immediately and continue driving or charging. This locking and unlocking method effectively meets the user's requirements for power, thereby improving the user experience.

[0056] 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, which can be determined according to actual conditions.

[0057] 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.

[0058] The types 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.

[0059] Among them, lithium batteries have the characteristics of high energy density and light weight, and can be used in electric vehicles with high energy density and weight requirements. Lithium iron phosphate batteries have higher safety and stability and are suitable for application scenarios that require higher safety.

[0060] 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.

[0061] Compared with energy batteries, power batteries have high 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 high energy per unit volume or weight, but have relatively low output power per unit time, have higher energy density, and have longer cycle life.

[0062] 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.

[0063] The embodiments of the present application do not limit the chemical properties of the single cells or the types of the single cells, which can be determined according to actual conditions.

[0064] When charging, the battery management unit 103 configures all single cells for free use, that is, converts 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, converts it to the second battery pack 102. If the user still wants to charge the single cell, it is necessary to use payment to unlock the single cell in order to charge the single cell. After the user pays, the battery management unit 103 unlocks the single cell and continues to charge the single cell. After charging is completed, the battery management unit 103 converts the single cell in the second battery pack 102 to the first battery pack 101.

[0065] The distributed battery pack provided in the embodiment of the present application includes a first battery pack for free use by users and a second battery pack for which users are required to pay for use; 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. By dividing the battery packs in the battery pack into a first battery pack for free use and a second battery pack for which users are required to pay for use. 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, so that the number of times the battery pack is over-discharged is reduced, thereby improving the safety of the battery. During the charging process, when the performance of the single battery in the first battery pack is high, it is converted 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, so that the number of times the battery pack is over-charged is reduced, thereby improving the safety of the battery.

[0066] The performance indicators of the single cells in the first battery pack and the second battery pack are described below.

[0067] The performance index of the single battery in the first battery pack is higher than the performance index of the single battery in the second battery pack. The performance index of each single battery is a value for measuring battery performance calculated based on the performance parameters of the single battery.

[0068] The performance parameter of each single cell includes at least one of voltage information, resistance information, current information and temperature information.

[0069] Battery over-discharge, battery aging, over-high or under-high temperature, and circuit failure will all affect battery performance. The performance index of a single battery can be calculated from at least one of the 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 embodiment of the present application does not limit the performance index, which can be determined according to actual conditions.

[0070] 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.

[0071] In the distributed battery pack provided in the present application, 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. The second battery pack is more prone to over-discharge. The number of times users use the second battery pack can be reduced by paying for use, thereby reducing the number of over-discharge times and improving battery safety.

[0072] Figure 2 The structural diagram of the vehicle provided for this application is as follows: Figure 2 As shown, 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.

[0073] The control unit 302 is connected to the battery management unit 103 of the distributed battery group 301 .

[0074] The control unit 302 is used to manage the first battery pack 101 that is free for users to use and the second battery pack 102 that users need to pay for use according to the performance parameters of the single batteries in the distributed battery group 301.

[0075] Specifically, Figure 3 The schematic diagram of the structure of the control unit provided in this application is as follows: Figure 3 As shown, the control unit includes a performance indicator calculation module and a conversion module.

[0076] The performance index calculation module is used to calculate the performance index of each single cell according to the performance parameters of each single cell.

[0077] The performance index 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 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 embodiment of the present application does not limit the performance index, which can be determined according to actual conditions.

[0078] The conversion module is used to convert any single cell in the first battery pack to the second battery pack if the performance index of the single cell is lower than a preset performance index threshold.

[0079] 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 the present application does not limit the performance indicator threshold and can be set according to actual conditions.

[0080] For example, the performance index of a single cell is -0.9V / min, the performance index threshold is -0.5V / min, -0.9<-0.5, so the single cell is transferred to the second battery pack. The performance index of a single cell is -110 milliohms, the performance index threshold is -90 milliohms, -110<-90, so the single cell is transferred to the second battery pack. The performance index of a single cell is -10A / min, the performance index threshold is -6A / min, -10<-6, so the single cell is transferred to the second battery pack. The performance index of a single cell is -75℃, the performance index threshold is -70℃, -75<-70, so the single cell is transferred to the second battery pack.

[0081] It should be noted that the method of converting the single battery in the first battery pack to the second battery pack is as follows: each single battery has a corresponding identifier, and the control unit sends a conversion instruction to the battery management unit, and the conversion instruction includes the identifier of the single battery to be converted; the battery management unit configures the single battery for paid use through the identifier of the single battery in the conversion instruction, and realizes the conversion to the second battery pack. The conversion process does not involve changes in the spatial position of the single battery.

[0082] When the control unit determines that the number of single cells in the first battery pack is less than the preset threshold, it can output payment information, and the user needs to pay before using the second battery pack; when outputting the payment information, it can send a lock instruction to the battery management unit, and the battery management unit locks the single cells in the second battery pack to prevent the single cells in the second battery pack from discharging, thereby ensuring battery safety. The preset threshold can be 2, 5, 100, etc. The embodiment of the present application does not limit the preset threshold, and it can be set according to actual conditions.

[0083] As a feasible payment method, the vehicle is also provided with an on-board display terminal connected to the control unit. The payment information is a payment page or a payment QR code. The control unit displays the payment page or the payment QR code through the on-board display terminal. The payment QR code is used for users to scan and pay for the use of the second battery pack. Users can complete the payment on the payment page or use a terminal device to scan the QR code to complete the payment.

[0084] 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.

[0085] After the user completes the payment, the payment platform can obtain the payment success information and send the unlocking command to the vehicle's control unit. The control unit sends the unlocking command to the battery management unit, and the battery management unit unlocks the single battery in the second battery pack and uses the second battery pack for power supply. If the user does not pay, the battery management unit will take corresponding measures, such as cutting off the power supply, to ensure the safe and stable operation of the vehicle.

[0086] When charging, the control unit sends a charging instruction to the battery management unit, and the single battery in the second battery pack of the battery management unit is converted to the first battery pack, and then the single battery in the first battery pack is charged. Then the control unit determines the performance index of each single battery in the first battery pack. When the performance index of a single battery exceeds the charging threshold, the control unit sends a stop charging instruction to the battery management unit, and the instruction carries the identification of the single battery. The battery management unit locks the single battery according to the identification of the single battery, stops charging the single battery, and converts the single battery to the second battery pack. If the user still wants to charge the single battery, it is necessary to use payment to unlock the single battery to realize the charging of the single battery. After the user pays, the control unit sends a re-charging instruction to the battery management unit, and the instruction carries the identification of the single battery. The battery management unit unlocks the single battery and continues to charge the single battery. After charging is completed, the control unit sends a conversion instruction to the battery management unit, and the battery management unit converts the single battery in the second battery pack to the first battery pack for subsequent use.

[0087] 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.

[0088] The vehicle provided in the present application converts the single cell in the first battery pack to 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 overcharging and discharging, thereby improving the safety of the battery.

[0089] Figure 4 This is a flow chart of an embodiment of the battery management method for a vehicle provided in this application. The execution subject of the embodiment of this 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 control unit is used as an example for explanation below. The method in this embodiment can be implemented by software, hardware, or a combination of software and hardware. Figure 4 As shown, the battery management method of the vehicle specifically includes the following steps:

[0090] S401: Obtain performance parameters of each single battery in a distributed battery pack of a vehicle.

[0091] In this step, in order to reduce the number of times the battery pack is overcharged and over-discharged, it is necessary to first obtain the performance parameters of each single battery in the distributed battery pack of the vehicle.

[0092] 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.

[0093] 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.

[0094] It should be noted that when the executing 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, the performance parameters are sent to the cloud platform through the wireless communication connection, and the cloud platform can obtain the performance parameters.

[0095] It should be noted that the performance parameter of each single cell includes at least one of voltage information, resistance information, current information and temperature information.

[0096] S402: Calculate the performance index of each single cell according to the performance parameter of each single cell.

[0097] 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 performance index of each single cell is calculated according to the performance parameters of each single cell, and the performance index is used to measure the battery performance.

[0098] 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.

[0099] It should be noted that the control unit may only obtain the performance parameter of each single cell in the first battery pack, and only calculate the performance index of each single cell in the first battery pack.

[0100] S403: Determine whether there is a target battery in the first battery pack with a performance indicator lower than a preset performance indicator threshold.

[0101] In this step, after the control unit calculates the performance index of each single battery, in order to reduce the number of over-discharges, it is necessary to determine whether there is a target battery in the first battery pack whose performance index is lower than a preset performance index threshold.

[0102] 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.

[0103] 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, so the target battery is switched to the second battery pack.

[0104] The control unit converts the target battery to the second battery in the following manner: each single battery has a corresponding identifier, and the control unit sends a conversion instruction to the battery management unit, the conversion instruction including the identifier of the target battery; the battery management unit configures the target battery for paid use through the identifier of the target battery in the conversion instruction, and completes the conversion process. The conversion process does not involve changes in the spatial position of the single battery.

[0105] It should be noted that when the execution entity is a cloud platform, the cloud platform sends a conversion instruction to the control unit via 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.

[0106] 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.

[0107] The battery management method provided in this embodiment calculates the performance index of each single battery cell, and when there is a target battery in the first battery pack whose performance index is lower than a preset performance index threshold, the target battery is converted to the second battery pack. Since the second battery pack is paid for use, the number of times the second battery pack is used can be reduced, thereby reducing the number of overcharging and discharging, thereby improving the safety of the battery.

[0108] Figure 5 This is a schematic diagram of the structure of an embodiment of a battery management device for a vehicle provided in this application. Figure 5 As shown, the battery management device 50 includes:

[0109] An acquisition module 51 is used 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;

[0110] The processing module 52 is used to:

[0111] Calculate the performance index of each single cell according to the performance parameters of each single cell, and the performance index is used to measure the battery performance;

[0112] Determine whether there is a target battery in the first battery pack whose performance index is lower than a preset performance index threshold;

[0113] The conversion module 53 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.

[0114] The vehicle battery management device provided in this embodiment is used to execute the technical solution in any of the aforementioned method embodiments, and its implementation principle and technical effects are similar and will not be repeated here.

[0115] An embodiment of the present application also provides a readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the technical solution provided by any of the aforementioned method embodiments is implemented.

[0116] An embodiment of the present application also provides a computer program product, including a computer program, which is used to implement the technical solution provided by any of the aforementioned method embodiments when executed by a processor.

[0117] Those skilled in the art can understand that all or part of the steps of implementing the above-mentioned method embodiments can be completed by hardware related to program instructions. The aforementioned program can be stored in a computer-readable storage medium. When the program is executed, the steps of the above-mentioned method embodiments are executed; and the aforementioned storage medium includes: ROM, RAM, disk or optical disk and other media that can store program codes.

[0118] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A distributed battery pack, characterized in that: include: 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; Each battery pack includes at least one single battery.

2. The distributed battery pack according to claim 1, characterized in that: 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.

3. The distributed battery pack according to claim 1, characterized in that: 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.

4. The distributed battery pack according to claim 1, characterized in that: 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.

5. The distributed battery pack according to claim 3 or 4, characterized in that: The single cell is a lithium battery or a lithium iron phosphate battery.

6. The distributed battery pack according to claim 3 or 4, characterized in that: The single cells in the first battery pack or the second battery pack include at least power cells or energy cells.

7. A vehicle, characterized in that: include: The distributed battery pack and control unit according to any one of claims 1 to 6; The control unit is connected to the battery management unit of the distributed battery pack; The control unit is used to manage the first battery pack for free use by the user and the second battery pack for which the user needs to pay according to the performance parameters of the single cells in the distributed battery group.

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