A control method, system and device of an electric vehicle quick-change battery pack and a medium

Abstract

The embodiment of the specification provides a control method, system and device of a quick-change battery pack of an electric vehicle and a medium. The method comprises: setting one of positions of the at least two quick-change battery packs as a position of a master battery pack, and setting the remaining positions as positions of slave battery packs; setting a quick-change battery pack plugged in the position of the master battery pack as the master battery pack; configuring a master BMS in the master battery pack as a total BMS, and the total BMS is used to realize control on the at least two quick-change battery packs plugged in the electric vehicle.

Description

TECHNICAL FIELD

[0001] The present specification relates to the technical field of new energy charging battery, and in particular to a control method, system and device of a fast-changing battery pack of an electric vehicle and a medium. BACKGROUND

[0002] When the fast-changing battery pack of the electric vehicle is used in parallel, different software needs to be configured for each battery pack to realize normal work, or a master-slave control mode is adopted, and an independent master control module needs to be added at the vehicle end, and each battery pack is configured as a slave control module. In the case where the software is not reconfigured, each slave control module has an independent address and cannot be interchanged.

[0003] Therefore, it is necessary to provide a control method, system and device of a fast-changing battery pack of an electric vehicle, which can save the cost of the master control module, and the positions of the battery packs can be interchanged without reconfiguring the software. SUMMARY

[0004] One of the embodiments of the present specification provides a control method of a fast-changing battery pack of an electric vehicle. The control method of the fast-changing battery pack of the electric vehicle comprises: setting one of the positions of the at least two fast-changing battery packs as a position of a master battery pack, and setting the remaining positions as positions of slave battery packs; setting the fast-changing battery pack plugged into the position of the master battery pack as a master battery pack, and configuring the master BMS in the master battery pack as a total BMS, which is used to realize control of the at least two fast-changing battery packs plugged into the electric vehicle.

[0005] One of the embodiments of the present specification provides a control system of a fast-changing battery pack of an electric vehicle. The system comprises: a setting module configured to set one of the positions of the at least two fast-changing battery packs as a position of a master battery pack, and set the remaining positions as positions of slave battery packs; and a control module configured to set the fast-changing battery pack plugged into the position of the master battery pack as a master battery pack, and configure the master BMS in the master battery pack as a total BMS, which is used to realize control of the at least two fast-changing battery packs plugged into the electric vehicle.

[0006] One of the embodiments of the present specification provides a control device of a fast-changing battery pack of an electric vehicle, comprising a processor configured to execute a control method of a fast-changing battery pack of an electric vehicle.

[0007] One of the embodiments of the present specification provides a computer-readable storage medium, which stores computer instructions. When a computer reads the computer instructions in the storage medium, the computer executes a control method of a fast-changing battery pack of an electric vehicle. BRIEF DESCRIPTION OF DRAWINGS

[0008] The present specification will be further described in the manner of exemplary embodiments, which will be described in detail with reference to the accompanying drawings. These embodiments are not restrictive, and in these embodiments, the same numbers represent the same structures or operations, in which:

[0009] Figure 1 is a schematic diagram of an application scenario of a control system of an electric vehicle fast-changing battery pack according to some embodiments of the present specification;

[0010] Figure 2 is a module diagram of a control system of an electric vehicle fast-changing battery pack according to some embodiments of the present specification;

[0011] Figure 3 is an exemplary flowchart of a control method of an electric vehicle fast-changing battery pack according to some embodiments of the present specification;

[0012] Figure 4 is a schematic diagram of a flow of determining a power supply strategy based on a machine learning model according to some embodiments of the present specification;

[0013] Figure 5 is a schematic diagram of a control device of an electric vehicle fast-changing battery pack according to some embodiments of the present specification;

[0014] Figure 6 is a schematic diagram of a fast-changing battery pack according to some embodiments of the present specification;

[0015] Figure 7 is a schematic diagram of a flow of determining a working mode of a fast-changing battery pack according to some embodiments of the present specification. DETAILED DESCRIPTION

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present specification, the following will briefly introduce the drawings needed to be used in the embodiment description. Obviously, the drawings in the following description are only some examples or embodiments of the present specification, and for those skilled in the art, the present specification can be applied to other similar scenarios without creative labor. Unless it is obvious from the language environment or otherwise stated, the same numbers in the drawings represent the same structures or operations.

[0017] It should be understood that the "system", "device", "unit" and / or "module" used herein is a method for distinguishing different components, elements, parts, portions or assemblies at different levels. However, if other words can achieve the same purpose, the words can be replaced by other expressions.

[0018] As used in the description and the claims, the words "including", "containing", "comprising", "having" and the like are to be taken in their broadest possible sense in that they are used to mean including, but not limited to, the stated components. As used in the description and the claims, the words "one", "the", and "said" are not used in a limiting fashion. Rather, both the singular and the plural are contended unless otherwise indicated by context. Generally, the terms "including", "containing", "comprising", "having" and the like are not intended to be limiting. Rather, these terms are intended to mean that the process, method, or apparatus includes the recited steps and / or elements, but not excluding others.

[0019] Flow diagrams are used in the description of the embodiments of the system according to the present description to illustrate the operations performed by the system according to the present description. It will be understood that the operations shown in the flow diagrams need not necessarily be performed in the order shown. Rather, the operations can be performed in a different order, or concurrently, or some of the operations can be omitted, or additional operations can be added.

[0020] Figure 1 is a schematic diagram of an application scenario 100 of the control system of the electric vehicle fast-changing battery pack according to some embodiments of the present description. In some embodiments, the application scenario 100 of the control system of the electric vehicle fast-changing battery pack can include a processing device 110, a network 120, a storage device 130, a fast-changing battery pack 140, and a location of the fast-changing battery pack 150 (which can also be referred to as a fast-changing battery rack 150). In some embodiments, the application scenario 100 of the control system of the electric vehicle fast-changing battery pack can also include a user terminal (not shown in the figure).

[0021] The processing device 110 can be configured to process data related to the control system of the electric vehicle swap battery pack. For example, one of the locations of the at least two swap battery packs is set as a master battery pack location, and the rest of the locations are set as slave battery pack locations, and the swap battery pack plugged in the master battery pack location is set as the master battery pack, and the master BMS in the master battery pack is configured as a total BMS, and the total BMS is configured to control the at least two swap battery packs plugged in the electric vehicle. Further, the processing device 110 can control the at least two swap battery packs to jointly supply power based on a power supply strategy of the electric vehicle through the total BMS. The power supply strategy of the electric vehicle can be determined based on the power supply demand of the electric vehicle and the state information of the at least two swap battery packs through a machine learning model. In some embodiments, the processing device 110 can be a single server or a group of servers. The group of servers can be centralized or distributed. In some embodiments, the processing device 110 can be local or remote. In some embodiments, the processing device 110 can be implemented on a cloud platform. For example only, the cloud platform can include a private cloud, a public cloud, a hybrid cloud, a community cloud, a distributed cloud, an on-premises cloud, a multi-cloud, etc., or any combination thereof. In some embodiments, the processing device 110 can be integrated or installed on the swap battery pack 140. In some embodiments, the processing device can include one or more sub-processing devices (e.g., single-core processing devices or multi-core multi-core processing devices). For example only, the processing device can include a central processing unit (CPU), an application-specific integrated circuit (ASIC), an application-specific instruction-set processor (ASIP), etc., or any combination thereof.

[0022] The network 120 can facilitate the exchange of data and / or information, which can include the location information of the swap battery pack 140 obtained by the processing device 110. In some embodiments, one or more components in the application scenario 100 of the control system of the electric vehicle swap battery pack (the processing device 110, the swap battery pack 140, the storage device 130, etc.) can send data and / or information to other components in the application scenario 100 of the control system of the electric vehicle swap battery pack through the network 120. In some embodiments, the network 120 can be any type of wired or wireless network. For example, the network 120 can include a cable network, a wired network, a fiber optic network, a telecommunication network, an intranet, an internetwork, a local area network (LAN), a wide area network (WAN), a wireless local area network (WLAN), a metropolitan area network (MAN), a public switched telephone network (PSTN), a Bluetooth network, a ZigBee network, a near-field communication (NFC) network, etc., or any combination thereof.

[0023] The storage device 130 is a source of information for the application scenario 100 of the control system for the electric vehicle swap battery pack. The storage device 130 can be used to provide the application scenario 100 of the control system for the swap battery pack with information related to the control method of the electric vehicle swap battery pack. The storage device 130 can be implemented in a single central server, multiple servers connected through a communication link, or multiple personal devices. The storage device 130 can be generated by multiple personal devices and cloud servers. In some embodiments, the storage device 130 can be used to store the state information of at least two swap battery packs. In some embodiments, the storage device 130 can store information and / or instructions for the processing device 110 to execute or use to perform the exemplary methods described in this specification. In some embodiments, the storage device 130 can include a mass storage, a removable storage, a volatile read-write memory (e.g., random access memory RAM), a read-only memory (ROM), or the like, or any combination thereof.

[0024] In some embodiments, the storage device 130 can be connected with the network 120 to communicate with one or more components (e.g., the processing device 110, the swap battery pack 140, etc.) of the application scenario 100 of the control system for the electric vehicle swap battery pack. One or more components of the application scenario 100 of the control system for the electric vehicle swap battery pack can access the data or instructions stored in the storage device 130 through the network 120. In some embodiments, the storage device 130 can be directly connected or communicated with one or more components (e.g., the processing device 110, the swap battery pack 140, etc.) in the application scenario 100 of the control system for the electric vehicle swap battery pack. In some embodiments, the storage device 130 can be part of the processing device 110.

[0025] The fast swap battery pack 140 can be an energy storage device for powering a particular device (e.g., an electric vehicle, a hybrid electric vehicle, etc.). In some embodiments, the fast swap battery pack 140 can include at least two fast swap battery packs. For example, the fast swap battery pack 140 can include a first fast swap battery pack 140-1, a second fast swap battery pack 140-2, and a third fast swap battery pack 140-3. In some embodiments, the fast swap battery pack can include a plurality of battery modules, one or more sensors, and / or a battery management system (BMS). Each battery module can be obtained by connecting a plurality of single cells in series, which can be used to store electrical energy. In some embodiments of the present disclosure, the single cell can be any type of battery, such as a lead-acid single cell, a nickel-metal hydride single cell, a lithium-ion (Li-ion) single cell, etc., without limitation. In some embodiments, the fast swap battery pack includes a master BMS and at least one slave BMS. The slave BMS can be used to obtain a plurality of state information of the single cells in the slave fast swap battery pack, including battery safety information. The master BMS can be used to control the charging and discharging behavior of the fast swap battery pack, and accept the state information collected by the slave BMS, etc. The master BMS can work in a first state or a second state, the first state being the control of at least two fast swap battery packs, and the second state being the control of the slave fast swap battery pack. One or more sensors in the fast swap battery pack 140 can detect the state information of the at least two fast swap battery packs. For example, the one or more sensors can include a temperature sensor configured to detect the overall temperature inside the fast swap battery pack 140, and / or the temperature at one or more locations inside. For another example, the one or more sensors can detect the battery health information, the remaining battery capacity, and the battery safety information, etc. of the fast swap battery pack 140. The one or more sensors can send the detected data to the slave BMS.

[0026] The position 150 of the fast swap battery pack refers to a position on the electric vehicle where the fast swap battery pack is to be installed. In some embodiments, the electric vehicle can include at least two positions of the fast swap battery pack. For example, the position 150 of the fast swap battery pack can include a first position 150-1 of the fast swap battery pack (also referred to as a first fast swap battery rack 150-1), a second position 150-2 of the fast swap battery pack (also referred to as a second fast swap battery rack 150-2), and a third position 150-3 of the fast swap battery pack (also referred to as a third fast swap battery rack 150-3). In some embodiments, the processing device 110 can set one of the at least two positions of the fast swap battery pack as a position of the master battery pack, and set the remaining positions as positions of the slave battery pack. For example, the processing device 110 can set the first position 150-1 of the fast swap battery pack as the position of the master battery pack, and set the second position 150-2 of the fast swap battery pack and the third position 150-3 of the fast swap battery pack as the positions of the slave battery pack.

[0027] In some embodiments, a user can interact with the control system of the fast swap battery pack of the electric vehicle via a user terminal (not shown in the figure). For example, when the processing device 110 sends the result of the power supply strategy to the user terminal for presentation to the user, the user can input an instruction via the user terminal to determine whether to cause the total BMS to reasonably allocate the power supply amount to the at least two fast swap battery packs for joint power supply. An exemplary user terminal can include a mobile device, a tablet computer, a notebook computer, etc., or any combination thereof.

[0028] Figure 2 FIG. 2 is a module diagram of the control system of the fast swap battery pack of the electric vehicle according to some embodiments of the present specification.

[0029] In some embodiments, the module diagram 200 of the control system of the fast swap battery pack of the electric vehicle can include a setting module 210, a first control module 220, and a second control module 230.

[0030] The setting module 210 can be configured to set one of the at least two positions of the fast swap battery pack as a position of the master battery pack, and set the remaining positions as positions of the slave battery pack.

[0031] The first control module 220 can be configured to set the fast swap battery pack plugged into the position of the master battery pack as the master battery pack, and configure the master BMS in the master battery pack as the total BMS, which is configured to control the at least two fast swap battery packs plugged into the electric vehicle.

[0032] The second control module 230 can be configured to control the at least two fast swap battery packs for joint power supply by the total BMS based on the power supply strategy of the electric vehicle.

[0033] It should be understood that,Figure 2 The system and its modules shown can be implemented in various ways. It should be noted that the above description of the candidate display, the determination system and its modules is for the convenience of description, and cannot limit the scope of the embodiments. It can be understood that, for those skilled in the art, after understanding the principles of the system, any combination of the modules or connection of the modules to other modules can be made without departing from the principles. In some embodiments, Figure 2 The setting module 210, the first control module 220 and the second control module 230 disclosed in the embodiments can be different modules in a system, or can be a module to realize the functions of two or more modules. For example, the modules can share a storage module, or each module can have its own storage module. Variations such as this are within the scope of the present disclosure.

[0034] Figure 3 is an exemplary flowchart of a control method of an electric vehicle fast-changing battery pack according to some embodiments of the present disclosure. As shown in Figure 3 The flow 300 includes the following steps. In some embodiments, Figure 3 One or more operations of the flow 300 shown can be implemented in the application scenario 100 of the control system of the electric vehicle fast-changing battery pack. For example, Figure 1 The flow 300 shown can be stored in the storage device in the form of instructions, and called and / or executed by the processing device 110. Figure 3

[0035] Step 310 sets one of the positions of the at least two fast-changing battery packs as the position of the master battery pack, and sets the remaining positions as the positions of the slave battery packs. In some embodiments, step 310 can be performed by the setting module 210.

[0036] The fast-changing battery pack refers to a battery pack that can be quickly changed. In some embodiments, the at least two fast-changing battery packs can be connected in parallel, and the total power supply current is equal to the sum of the power supply currents of the at least two fast-changing battery packs. In some embodiments, the at least two fast-changing battery packs can be connected in series, and the total power supply voltage is equal to the sum of the power supply voltages of the at least two fast-changing battery packs. In some embodiments, the at least two fast-changing battery packs can also be connected in parallel and in series.

[0037] The position of the master battery pack refers to the position where the battery pack to be the master battery pack is placed. The position of the slave battery pack refers to the position where the battery pack to be the slave battery pack is placed.

[0038] ​In some embodiments, the processing device 110 can set one of the positions of the at least two swap battery packs as the position of the master battery pack and the rest of the positions as the positions of the slave battery packs according to a preset rule. In some embodiments, the processing device 110 can set the position of the first swap battery pack as the position of the master battery pack. For example, as shown in FIG. 1, the processing device 110 can set the position 150-1 of the first swap battery pack in the control device 500 of the electric vehicle swap battery pack as the position of the master battery pack, and set the position 150-2 of the second swap battery pack and the position 150-3 of the third swap battery pack as the positions of the slave battery packs. More details about the control device of the electric vehicle swap battery pack can be referred to the detailed description in Figure 5 . Figure 4 .

[0039] In some embodiments, the processing device 110 can set the position of the last swap battery pack as the position of the master battery pack. In some embodiments, the processing device 110 can set the position of the middle swap battery pack as the position of the master battery pack, and set the position of the first of the two middle swap battery packs as the position of the master battery pack if there are two middle swap battery packs.

[0040] In step 320, the swap battery pack plugged in the position of the master battery pack is set as the master battery pack, and the master BMS in the master battery pack is configured as the total BMS, which is used to realize the control of the at least two swap battery packs plugged in the electric vehicle. In some embodiments, step 320 can be performed by the first control module 220.

[0041] The master battery pack refers to the swap battery pack plugged in the position of the master battery pack. The slave battery pack refers to the swap battery pack plugged in the position of the slave battery pack. For example, as shown in FIG. 1, if the position 150-1 of the first swap battery pack is set as the position of the master battery pack, and the positions 150-2 and 150-3 of the second and third swap battery packs are set as the positions of the slave battery packs, the first swap battery pack 140-1 plugged in the position 150-1 of the first swap battery pack is the master battery pack, and the second swap battery pack 140-2 and the third swap battery pack 140-3 plugged in the positions 150-2 and 150-3 of the second and third swap battery packs are the slave battery packs. Figure 5

[0042] In some embodiments, the swap battery pack can include a master BMS and at least one slave BMS. The number of slave BMSs is determined according to the number of battery cells in the swap battery pack. For example, as shown in FIG. 1, the first swap battery pack 140-1 plugged in the position 150-1 of the first swap battery pack includes a master BMS 141-1 and two slave BMSs 141-2 and 141-3, and the second swap battery pack 140-2 plugged in the position 150-2 of the second swap battery pack includes a master BMS 142-1 and one slave BMS 142-2. Figure 6 ​As shown, each of the first fast swap battery pack 140-1, the second fast swap battery pack 140-2 and the third fast swap battery pack 140-3 includes one master BMS and multiple slave BMSs. The master BMS works in a first state or a second state, the first state is the control of at least two fast swap battery packs, and the second state is the control of the own fast swap battery pack. For example, as shown, when the first fast swap battery pack 140-1 is the master battery pack plugged in the position of the master battery pack, the master BMS in the first fast swap battery pack 140-1 is configured as the total BMS, and the master BMS works in the first state, that is, the master BMS can control the first fast swap battery pack 140-1, the second fast swap battery pack 140-2 and the third fast swap battery pack 140-3. Correspondingly, the second fast swap battery pack 140-2 and the third fast swap battery pack 140-3 are slave battery packs plugged in the position of the slave battery pack, and the master BMSs of the two slave battery packs work in the second state, that is, the two master BMSs can control the own fast swap battery pack respectively. Figure 6

[0043] The slave BMS can be used to obtain multiple state information of at least one battery cell in the own fast swap battery pack, and the state information can include battery safety information. For example, each slave BMS can be connected with at least one battery cell (for example, 4, 6, 8, etc.), so as to obtain multiple state information of the connected at least one battery cell. Then, the master BMS can determine the state information of the fast swap battery pack based on the multiple state information of at least one battery cell in the own fast swap battery pack obtained by the slave BMS.

[0044] In some embodiments, the master BMS and the slave BMS can be separate or integrated.

[0045] The state information refers to information that can reflect the connection mode, health, safety, remaining capacity and the like of the fast swap battery pack. In some embodiments, the state information can include battery safety information. In some embodiments, the state information can include at least one of the fast swap battery pack connection mode, the fast swap battery pack health information, the fast swap battery pack remaining capacity and / or the fast swap battery pack safety information.

[0046] The fast swap battery pack connection mode refers to the connection mode between at least two fast swap battery packs. For example, the fast swap battery pack connection mode can include parallel connection between at least two fast swap battery packs.

[0047] The fast swap battery pack health information refers to information that can reflect the health degree of the fast swap battery pack. In some embodiments, the fast swap battery pack health information can include at least one of the remaining capacity of the fast swap battery pack, the system capacity offset, the system pressure difference, the self-discharge and consistency, the internal resistance consistency, the temperature state, and the remaining life.

[0048] ​The remaining capacity of a battery cell in the fast swap battery pack can be expressed as the maximum available capacity of the battery cell after degradation. Further, the remaining capacity of the fast swap battery pack can be expressed as the maximum available capacity of the fast swap battery pack after degradation. The remaining capacity of the fast swap battery pack can be the minimum of the remaining capacities of all battery cells in the fast swap battery pack. The smaller the difference between the remaining capacity and the rated capacity (i.e., the standard capacity at the factory) of the fast swap battery pack, the higher the health of the fast swap battery pack.

[0049] The capacity deviation of a battery cell in the fast swap battery pack can refer to the difference between the state of charge of a battery cell that does not reach the charge / discharge cutoff voltage and the state of charge of a battery cell that first triggers the charge / discharge cutoff condition at the system charge cutoff or discharge cutoff. It can be understood that the fast swap battery pack is composed of multiple battery cells, and the working voltages of these battery cells are inconsistent in the charging and discharging conditions. In a complete charging or discharging process, because of the voltage inconsistency between the battery cells, the battery cell with a high / low voltage will be fully charged / empty first, thereby triggering the charge / discharge cutoff action of the fast swap battery pack. At this time, the battery cell with a low voltage is not fully charged due to the charge cutoff, or the battery cell with a high voltage is not empty due to the discharge cutoff, resulting in a capacity deviation. In some embodiments, the capacity deviation can evaluate the consistency of multiple battery cells. The smaller the capacity deviation, the better the cooperative charging / discharging performance of the fast swap battery pack, and the higher the consistency, the stronger the charging / discharging power capability. It can be understood that the capacity deviation of the fast swap battery pack can be obtained by the average of the capacity deviations of one or more battery cells in the fast swap battery pack, and can be used to evaluate the overall consistency of the fast swap battery pack.

[0050] The internal resistance can refer to the direct current resistance (DCR). It can be understood that the internal resistance consistency of the fast swap battery pack can reflect the difference between the internal resistances of the battery cells in the fast swap battery pack. Similarly, the lower the internal resistance consistency of the fast swap battery pack, the lower the health, and vice versa, the higher the health.

[0051] The internal resistance deviation can refer to the difference between the internal resistance of a battery cell and the average internal resistance (the average internal resistance can be the average of the internal resistances of all battery cells in the fast swap battery pack). For example, the internal resistance deviation of a battery cell can refer to the difference between the internal resistance of the battery cell and the average internal resistance of all battery cells in the fast swap battery pack. In some embodiments, the internal resistance deviation can evaluate the consistency of multiple battery cells of the fast swap battery pack. For example, the smaller the internal resistance deviation, the higher the flow current when the multiple battery cells of the fast swap battery pack cooperatively charge or discharge, and the greater the health.

[0052] The system pressure difference can refer to the difference between the highest voltage of the single battery in the fast-changing battery pack and the lowest voltage of the single battery. It can be understood that the greater the voltage difference of the plurality of single batteries in the fast-changing battery pack, the lower the matching degree of the plurality of single batteries, and the lower the health degree of the fast-changing battery pack; on the contrary, the smaller the voltage difference, the higher the matching degree of the plurality of single batteries, and the higher the health degree of the fast-changing battery pack.

[0053] The self-discharge amount can refer to the percentage of the automatic reduction of the power of one or more single batteries in the fast-changing battery pack under no use condition. For example, if the capacity of one or more single batteries is reduced by more than 3% every day and night within 1 month after being fully charged, it is considered to have a low health degree; on the contrary, if the capacity is reduced by less than 3% every day and night, it is considered to have a high health degree. In some embodiments, the closer the percentage of the self-discharge amount of one or more single batteries in the fast-changing battery pack (e.g., the percentage of the self-discharge amount is about 3%), the higher the consistency of the self-discharge of the fast-changing battery pack, and the higher the health degree; on the contrary, the greater the difference in the percentage of the self-discharge amount, the lower the consistency of the self-discharge of the fast-changing battery pack, and the lower the health degree.

[0054] The temperature state can refer to the current temperature generated by the fast-changing battery pack. It can be understood that the higher the temperature of the fast-changing battery pack is above the preset temperature threshold (e.g., 50°C), the lower the health degree; on the contrary, the lower the temperature is below the preset threshold, the higher the health degree.

[0055] The remaining life can refer to the remaining life evaluated by the fast-changing battery pack. It can be understood that the longer the remaining life, the higher the health degree of the fast-changing battery pack; on the contrary, the lower the health degree.

[0056] The remaining capacity of the fast-changing battery pack refers to a value that can reflect the remaining capacity of the fast-changing battery pack. For example, the remaining capacity of the fast-changing battery pack can be 10Ah, 30Ah, 50Ah, etc.

[0057] The fast-changing battery pack safety information refers to information that can reflect the safety degree of the fast-changing battery pack. In some embodiments, the fast-changing battery pack safety information can include the temperature state of the fast-changing battery pack. When the temperature of the fast-changing battery pack is higher than the preset temperature threshold (e.g., 55°C), the safety degree is lower, and the use of the battery pack needs to be stopped.

[0058] The total BMS refers to a system that can be used to control at least two fast-changing battery packs plugged into an electric vehicle. For example, as shown in FIG. 1, the total BMS can be used to control the fast-changing battery pack 1 and the fast-changing battery pack 2 plugged into the electric vehicle. Figure 5 and Figure 6As shown, taking the first swap battery pack position 150-1 as an example, if the first swap battery pack position 150-1 is set as the master battery pack position, the total BMS (i.e., the master BMS of the first swap battery pack 140-1) can be used to control the first swap battery pack 140-1, the second swap battery pack 140-2 and the third swap battery pack 140-3 plugged in the electric vehicle.

[0059] In some embodiments, the processing device 110 can set the swap battery pack plugged in the master battery pack position as the master battery pack, and configure the master BMS in the master battery pack as the total BMS. For example, as shown in Figure 5 and Figure 6 As shown, if the first swap battery pack position 150-1 is set as the master battery pack position, the second swap battery pack position 150-2 and the third swap battery pack position 150-3 are set as the slave battery pack positions, the first swap battery pack 140-1 plugged in the first swap battery pack position 150-1 is the master battery pack, and the second swap battery pack 140-2 and the third swap battery pack 140-3 plugged in the second swap battery pack position 150-2 and the third swap battery pack position 150-3 are the slave battery packs, the processing device 110 can set the master BMS in the master battery pack (i.e., the first swap battery pack 140-1) as the total BMS.

[0060] In some embodiments, the master BMS of the at least two swap battery packs can include control software for determining the working mode of the swap battery pack based on the state of the electric vehicle and the state of the swap battery pack, wherein the master battery working mode is included. The swap battery pack performing the master battery working mode is determined as the master swap battery pack. More details about determining the working mode of the swap battery pack can be found in Figure 7 and the related description.

[0061] At step 330, the at least two swap battery packs are controlled by the total BMS to jointly supply power based on the power supply strategy of the electric vehicle. In some embodiments, step 330 can be performed by the second control module 230.

[0062] The power supply strategy refers to the power supply current or power supply voltage assigned to each of the at least two swap battery packs. For example, if the swap battery packs include three swap battery packs and are connected in parallel, the power supply strategy can be that the power supply currents of the three swap battery packs are 20A, 20A, and 60A, respectively. For another example, if the swap battery packs include three swap battery packs and are connected in series, the power supply strategy can be that the power supply voltages of the three swap battery packs are 60V, 60V, and 80V, respectively. For another example, if the swap battery packs include swap battery pack A, swap battery pack B, and swap battery pack C, and swap battery pack A and swap battery pack B are connected in parallel and then connected in series with swap battery pack C, the power supply strategy can be that the power supply voltage of the battery pack after the parallel connection of swap battery pack A and swap battery pack B is 120V, the power supply voltage of swap battery pack C is 80V, and the power supply currents of swap battery pack A, swap battery pack B, and swap battery pack C are 60A, 40A, and 100A, respectively.

[0063] In some embodiments, the processing device 110 can determine the power supply strategy based on the power supply demand of the electric vehicle and the battery safety information in the state information of the at least two swap battery packs. For example, as shown in FIG. 1, if the swap battery packs include first swap battery pack 140-1, second swap battery pack 140-2, and third swap battery pack 140-3, and are connected in parallel. The power supply demand of the electric vehicle is 100A. It is obtained from the BMS that the temperature of the second swap battery pack 140-2 is 60°C, which exceeds the temperature threshold (e.g., 55°C). When determining the power supply strategy, the power supply current of the second swap battery pack 140-2 can be set to 0, and the power supply currents of the first swap battery pack 140-1 and the third swap battery pack 140-3 can be set to be equal. The power supply strategy can be set to the power supply currents of the first swap battery pack 140-1, the second swap battery pack 140-2, and the third swap battery pack 140-3, which can be 50A, 0A, and 50A, respectively. Figure 5

[0064] In some embodiments, the processing device 110 can determine the power supply strategy based on the power supply demand of the electric vehicle and the health degree in the state information of the at least two swap battery packs. For example, as shown in FIG. 1, if the swap battery packs include first swap battery pack 140-1, second swap battery pack 140-2, and third swap battery pack 140-3, and are connected in parallel. The power supply demand of the electric vehicle is 100A. It is obtained from the BMS that the health degree of the second swap battery pack 140-2 is 80%, which is less than the health threshold (e.g., 90%). When determining the power supply strategy, the power supply current of the second swap battery pack 140-2 can be set to 0, and the power supply currents of the first swap battery pack 140-1 and the third swap battery pack 140-3 can be set to be equal. The power supply strategy can be set to the power supply currents of the first swap battery pack 140-1, the second swap battery pack 140-2, and the third swap battery pack 140-3, which can be 50A, 0A, and 50A, respectively. Figure 5 ​As shown, if the health of the three fast-charging battery packs is 100%, the current that can be reached is 50A. The power supply requirement of the electric vehicle is 100A. If the health of the first fast-charging battery pack 140-1 is 60%, the health of the second fast-charging battery pack 140-2 is 60%, and the health of the third fast-charging battery pack is 100%, the BMS obtains the health of the first fast-charging battery pack 140-1 and the health of the second fast-charging battery pack 140-2, and determines the power supply strategy. The power supply current of the first fast-charging battery pack 140-1 and the second fast-charging battery pack 140-2 should be less than or equal to 50x60% = 30A, otherwise it will affect the service life of the fast-charging battery pack. The power supply current of the third fast-charging battery pack 140-3 can be set to be less than or equal to 50A, and the power supply strategy can be set to the power supply current of the first fast-charging battery pack 140-1, the second fast-charging battery pack 140-2 and the third fast-charging battery pack 140-3 can be 30A, 30A and 40A respectively.

[0065] In some embodiments, the processing device 110 can determine the power supply strategy based on the power supply requirement of the electric vehicle and the state information of the at least two fast-charging battery packs through a machine learning model. The state information can include battery health information, battery remaining capacity and battery safety information of the at least two fast-charging battery packs. For more details about determining the power supply strategy through a machine learning model, please refer to Figure 4 and the related description.

[0066] In some embodiments, the processing device 110 can distribute the power supply to the at least two fast-charging battery packs for joint power supply through the total BMS based on the power supply strategy of the electric vehicle. For example, as Figure 5 shown, if the power supply current of the first fast-charging battery pack 140-1, the second fast-charging battery pack 140-2 and the third fast-charging battery pack 140-3 can be 30A, 30A and 40A respectively, the total BMS can control the first fast-charging battery pack 140-1 to provide 30A current, control the second fast-charging battery pack 140-2 to provide 30A current, and control the third fast-charging battery pack 140-3 to provide 40A current based on the power supply strategy of the electric vehicle.

[0067] In some embodiments, the processing device 110 can send the result of the power supply strategy to the user terminal for presentation to the user, and determine whether to make the total BMS reasonably distribute the power supply to the at least two fast-charging battery packs for joint power supply based on the instruction input by the user through the user terminal. The power supply strategy determined by the user is more accurate, which avoids the danger caused by obviously unreasonable power supply strategy.

[0068] In some embodiments of this specification, the quick-swap battery pack, which is plugged into the main battery pack, is designated as the main battery pack, and the main BMS within the main battery pack is configured as the overall BMS. Furthermore, this overall BMS distributes power to at least two quick-swap battery packs for joint power supply based on a power supply strategy. Since the vehicle does not require an additional main control module, costs are saved. Moreover, because the control software for each quick-swap battery pack is consistent, plugging and unplugging is convenient, eliminating the need for software reloading and making battery pack replacement easier. Additionally, the overall BMS's power supply strategy for joint power supply to at least two quick-swap battery packs improves battery life and avoids safety issues.

[0069] Figure 4 This is a schematic diagram of a process 400 for determining a power supply strategy based on a machine learning model, according to some embodiments of this specification.

[0070] In some embodiments, the machine learning model 420 may be a deep learning neural network model. Exemplary deep learning neural network models may include convolutional neural networks (CNNs), deep neural networks (DNNs), recurrent neural networks (RNNs), and combinations thereof.

[0071] In some embodiments, such as Figure 4 As shown, the input to the machine learning model 420 can be the power demand 410-1 of the electric vehicle and the state information 410-2 of at least two fast-swap battery packs. In some embodiments, the output of the machine learning model 420 is a power supply strategy 430. More details regarding the state information can be found in [link to relevant documentation]. Figure 3 And its related descriptions.

[0072] In some embodiments, such as Figure 4As shown, the machine learning model 420 can be trained by using a plurality of positive samples 440-1 and negative samples 440-2 to form training samples for training an initial model 450. The positive samples 440-1 can include the power supply demand 410-1 of the electric vehicle and the state information 410-2 of the at least two swap battery packs when the power supply strategy of the sample swap battery pack is reasonable, and the negative samples 440-2 can include the power supply demand 410-1 of the electric vehicle and the state information 410-2 of the at least two swap battery packs when the power supply strategy of the sample swap battery pack is unreasonable. In some embodiments, the processing device 110 can obtain the sample power supply demand of the positive samples 440-1 and the negative samples 440-2 and the sample state information of the at least two swap battery packs at the swap station through the bus interface of the swap battery pack. In some embodiments, the processing device 110 can obtain the evaluation information (evaluation of reasonable power supply strategy or unreasonable power supply strategy) of the user after swapping, and determine the positive and negative samples according to the evaluation information and the sample power supply demand of the corresponding electric vehicle and the sample state information of the at least two swap battery packs.

[0073] The label can represent the power supply strategy of the sample electric vehicle. In some embodiments, the label can be based on manual annotation. In some embodiments, the processing device 110 can vectorize the sample power supply demand of the electric vehicle and the sample state information of the at least two swap battery packs, and then calculate the distance. When the distance meets a certain threshold, it can be considered that the features are similar, and the labels are considered to be the same, thereby reducing the cost of manual annotation.

[0074] The training of the initial model 450 can include one or more iterations. For example only, in the current iteration, for each training sample, the processing device 110 can determine the power supply strategy 430 of the positive sample 440-1 and the negative sample 440-2 of the training sample by using an intermediate model. If the current iteration is the first iteration, the intermediate model can be the initial model 450. If the current iteration is other iterations, the intermediate model can be the model generated in the last iteration. The processing device 110 can determine the value of the loss function based on the accuracy of the power supply strategy 430 of the positive sample 440-1 and the negative sample 440-2 of the training sample, and update the intermediate model based on the value of the loss function.

[0075] In some embodiments, the parameters of the initial model 450 can be updated based on a plurality of training samples iterations, so that the loss function of the intermediate model meets a preset condition. For example, the loss function converges, or the value of the loss function is less than a preset value. When the loss function meets the preset condition, the model training is completed, and the trained initial model 450 can be used as the machine learning model 420.

[0076] In some embodiments of the present specification, the power supply strategy can be quickly and accurately determined by the machine learning model, thereby helping the total BMS to reasonably allocate the power supply to at least two fast-changing battery packs for joint power supply, while ensuring safety, increasing the life of the battery. For example, if the fast-changing battery pack includes three fast-changing battery packs and is connected in parallel, the power supply demand of the electric vehicle is 100A, and the state information of the three fast-changing battery packs includes the temperature of the fast-changing battery pack, the temperatures of the three fast-changing battery packs are 30℃, 60℃ and 25℃ respectively, and the temperature threshold is 55℃. The power supply strategy can be that the power supply currents of the three fast-changing battery packs are 50A, 0A and 50A respectively, and the implementation of the power supply strategy can ensure safety. For another example, if the fast-changing battery pack includes three fast-changing battery packs and is connected in parallel, the power supply demand of the electric vehicle is 100A, and the state information of the three fast-changing battery packs includes the health degree of the fast-changing battery pack, the health degrees of the three fast-changing battery packs are 60%, 60% and 100% respectively, and the health degree of the three fast-changing battery packs is 100%, the current that can be reached is 50A. The power supply strategy can be that the power supply currents of the three fast-changing battery packs are 30A, 30A and 40A respectively, and the implementation of the power supply strategy can increase the life of the battery.

[0077] Figure 5 FIG. 5 is a schematic diagram of a control device 500 of an electric vehicle fast-changing battery pack according to some embodiments of the present specification; Figure 6 FIG. 6 is a schematic diagram of a fast-changing battery pack 140 according to some embodiments of the present specification.

[0078] In some embodiments, as Figure 5As shown, the control device 500 of the electric vehicle fast-changing battery pack can include a fast-changing battery pack 140, a fast-changing battery rack 150 (also referred to as a fast-changing battery pack position 150), a fast-changing plug 510, a fast-changing socket 520, an address coding line 530, a whole vehicle control signal input line 540, a communication, auxiliary power supply and wake-up signal line 550, a direct current output line 560 and a power distribution unit 570. Among them, the fast-changing battery pack 140 can include a first fast-changing battery pack 140-1, a second fast-changing battery pack 140-2 and a third fast-changing battery pack 140-3. The fast-changing battery pack position 150 can include a first fast-changing battery pack position 150-1, a second fast-changing battery pack position 150-2 and a third fast-changing battery pack position 150-3. The fast-changing plug 510 can include a first fast-changing plug 510-1, a second fast-changing plug 510-2 and a third fast-changing plug 510-3. The fast-changing socket 520 can include a first fast-changing socket 520-1, a second fast-changing socket 520-2 and a third fast-changing socket 520-3. The address coding line 530 can include a first address coding line 530-1, a second address coding line 530-2 and a third address coding line 530-3. The power distribution unit 570 can include a fast-charging interface 570-1, a slow-charging interface 570-2, a whole vehicle interface 570-3 and a whole vehicle other interface 570-4.

[0079] As Figure 5As shown, the quick-change battery pack 140 is provided with positive and negative output relays, and the parallel connection is completed through the power distribution unit 570. According to the needs, a charging relay and the like are arranged in the power distribution unit 570, the relay control line is led to the quick-change socket 520 of the quick-change battery rack 150, the quick-change sockets 520 of different quick-change battery racks 150 are provided with different address coding lines 530, and address coding is performed according to certain rules, so that different quick-change battery racks 150 have unique hardware address coding information. The communication, auxiliary power supply and wake-up signal lines 550 of each quick-change battery rack 150 are connected in parallel to the vehicle end, and the vehicle control signal input line 540 is led to the quick-change socket 520 of the quick-change battery rack 150, wherein the vehicle control signal includes but is not limited to a charging connection state signal, a charging wake-up, temperature detection, a high-low voltage interlocking signal and the like. Each quick-change battery pack 140 includes a BMS and uses the same control software. When multiple quick-change battery packs 140 are used in parallel, the BMS in each quick-change battery pack 140 first detects the hardware address coding signal corresponding to the installation position. If the first quick-change battery pack position 150-1 (i.e. the first quick-change battery rack 150-1) is set as the position of the master battery pack, the first quick-change battery pack 140-1 located at the first quick-change battery pack position 150-1 is automatically configured as the master battery pack, the BMS of the master battery pack performs communication work with the vehicle and the charging system, accepts the control of the vehicle and the charging system, receives the information of the master battery pack and the slave battery pack and controls the master battery pack and the slave battery pack to work according to the needs. The BMS in the second quick-change battery pack 140-2 located at the second quick-change battery pack position 150-2 and the third quick-change battery pack 140-3 located at the third quick-change battery pack position 150-3 reads the hardware coding signal of the respective positions and configures the respective software numbers as the unique identification code for Controller Area Network (CAN) bus communication, and is automatically configured as a slave battery pack, the BMS in the slave battery pack transmits the state information of the battery to the BMS of the master battery pack, and receives the control instructions of the BMS of the master battery pack and performs the work of powering on and off.

[0080] As shown in FIG. 1, Figure 6 As shown in FIG. 1,

[0081] Figure 7 is a schematic diagram of a flow 700 of determining the working mode of the fast- swap battery pack according to some embodiments of the present specification.

[0082] In some embodiments, as shown in Figure 7 , the main BMS of each fast-swap battery pack includes control software that can be used to determine the working mode of the fast-swap battery pack based on the state of the electric vehicle and the state of the fast-swap battery pack. Wherein, the state of the electric vehicle can include whether it is a loading state 720, whether it is a swap station working state 750. The state of the fast-swap battery pack can include whether it is a unique battery 730, whether it is a main battery pack 740. The working mode of the fast-swap battery pack can include a single battery mode 760, a slave battery working mode 770, a main battery working mode 780, a swap station working mode 790 and an energy storage working mode 7100.

[0083] As shown in Figure 7 , after power-on and reading the wake-up state and address coding information 710, the control software determines whether it is a loading state 720, and when the determination result is yes, it performs a determination of whether it is a unique battery 730; when the determination result is no, it performs a determination of whether it is a swap station working state 750.

[0084] When performing the determination of whether it is a unique battery 730, the control software determines whether it is a unique battery 730, and when the determination result is yes, it determines that the working mode of the fast-swap battery pack is a single battery mode 760, and the fast-swap battery pack performs the single battery mode 760; when the determination result is no, it performs a determination of whether it is a main battery pack 740.

[0085] When performing the determination of whether it is a main battery pack 740, the control software determines whether it is a main battery pack 740, and when the determination result is yes, it determines that the working mode of the fast-swap battery pack is a main battery working mode 780, and the fast-swap battery pack performs the main battery working mode 780; when the determination result is no, it determines that the working mode of the fast-swap battery pack is a slave battery working mode 770, and the fast-swap battery pack performs the slave battery working mode 770.

[0086] When performing the determination of whether it is a unique battery 750, the control software determines whether it is a swap station working state 750, and when the determination result is yes, it determines that the working mode of the fast-swap battery pack is a swap station working mode 790, and the fast-swap battery pack performs the swap station working mode 790; when the determination result is no, it determines that the working mode of the fast-swap battery pack is an energy storage working mode 7100, and the fast-swap battery pack performs the energy storage working mode 7100.

[0087] In some embodiments of the present specification, the working mode of the quick-change battery pack is determined by control software, the positions of the battery packs can be interchanged, and since the same software control process is executed after all the quick-change battery packs are powered on, the configuration process is simple and fast.

[0088] In some embodiments, the control device of the electric vehicle quick-change battery pack comprises a processor and a memory; the memory is used to store instructions, and the instructions are executed by the processor to cause the device to implement the control method of the electric vehicle quick-change battery pack.

[0089] In some embodiments, the computer readable storage medium stores computer instructions, and when the computer reads the computer instructions in the storage medium, the computer runs the control method of the electric vehicle quick-change battery pack.

[0090] The beneficial effects that may be brought by the embodiments of the present specification include but are not limited to: (1) by setting the quick-change battery pack plugged in the position of the main battery pack as the main battery pack, and configuring the main BMS in the main battery pack as the total BMS. Further, by the total BMS, the power supply amount is distributed to at least two quick-change battery packs for joint power supply based on the power supply strategy. Since the vehicle does not need to be additionally configured with a master control module, the cost can be saved. And since each quick-change battery pack and the control software of each quick-change battery pack are consistent, it is convenient to plug in, and there is no need to reload the software, and the battery pack replacement is more convenient. In addition, the total BMS distributes the power supply amount to at least two quick-change battery packs for joint power supply based on the power supply strategy, which can improve the battery life and avoid safety problems. (2) The power supply strategy can be quickly and accurately determined by the machine learning model, thereby helping the total BMS to reasonably distribute the power supply amount to at least two quick-change battery packs for joint power supply, which increases the life of the battery while ensuring safety. (3) The working mode of the quick-change battery pack is determined by control software, the positions of the battery packs can be interchanged, and since all the quick-change battery packs execute the same software control process after being powered on, the configuration process is simple and fast.

[0091] The above has described the basic concepts, and it is obvious that the above detailed disclosure is only taken as an example and does not constitute a limitation on the present specification. Although it is not explicitly stated here, those skilled in the art can make various modifications, improvements and corrections to the present specification. Such modifications, improvements and corrections are suggested in the present specification, so such modifications, improvements and corrections still belong to the spirit and scope of the exemplary embodiments of the present specification.

[0092] Also, the use of "a" or "an" or "the" or "at least one" or "one or more" or "one or more" are used to include one or more than one, independent of other instances or usages of "at least one" or "one or more." The use of the conjunctive, "or" in the context of a list of items prefaced by "for example" or "such as" indicates a non-exclusive list, and the list of items can include one item, more than one item, or the same term can be repeated in the list. The term "adapted to" is used to indicate that the item being adapted to is changed to operate intelligently, and is not a manual operation, unless otherwise indicated by context.

[0093] In addition, the order of presentation of the treatment elements and sequences described in this specification, the use of the numerals, or the use of other designations, is not intended to limit the order of the processes and methods of this specification, unless the order is explicitly stated in the claims. Although some presently preferred embodiments of the application have been described above with particular emphasis on the uses thereof, it will be understood that this is for illustrative purposes only and that additional modifications and equivalents of the described embodiments are intended to fall within the scope of the appended claims. For example, although the system components described above can be implemented by hardware devices, they can also be implemented by software solutions only, such as installing the described system on an existing server or mobile device.

[0094] Similarly, it is noted that while the specification has been presented with reference to embodiments, the application is not to be construed as being limited to the particular embodiments disclosed. Specifically, although the description of the embodiments of the specification has at times grouped various features into one embodiment, drawing, or description of the same, this method of disclosure should not be interpreted as meaning that the claimed invention requires more features than are mentioned in the claims. In fact, the features of the embodiments are fewer than the total features of the single embodiments disclosed above.

[0095] Some embodiments use numerical designations to describe components, quantities of attributes. It is understood that such numerical designations used in the description of the embodiments are, in some examples, modified by the adjectives "about," "approximately," or "substantially." Unless otherwise stated, "about," "approximately," or "substantially" indicate that the described numerical value allows for a ±20% variation. Accordingly, in some embodiments, numerical parameters in the specification and claims are approximations that can vary depending on the desired properties sought to be obtained by the individual embodiments. In some embodiments, numerical parameters are determined by the use of standard techniques. Although the numerical ranges and parameters setting forth the broad scope of the embodiments of the specification are approximations, unless otherwise indicated, in specific embodiments, numerical values are reported as precisely as practicable. The numerical values set forth in the specific examples are reported as precisely as practicable.

[0096] Each patent, patent application, patent publication, and other material cited in this specification is hereby incorporated by reference in its entirety herein for the teachings relevant to the sentence and / or paragraph in which the reference is presented. Document histories, to the extent not inconsistent with the pertinent U.S. patent application file history, are also incorporated by reference herein. To the extent that material incorporated by reference contradicts or contradicts any portion of this specification, including definition, the portion of the material incorporated by reference prevails. Note, however, that in the event of inconsistencies between any such material and the present specification, including definitions, the present specification, including definitions, will control.

[0097] Finally, it should be understood that the embodiments described herein are merely exemplary of the principles of the present disclosure. Other embodiments can be devised without departing from the scope of the present disclosure. Accordingly, the embodiments described herein are not intended to limit the scope of the present disclosure. Rather, the scope of the present disclosure is to be determined by the claims which follow.

Claims

1. A control method of an electric vehicle quick-change battery pack, characterized by, The electric vehicle includes at least two positions of the quick-change battery pack, and the method includes the following steps: One of the positions of the at least two quick-change battery packs is set as a position of a master battery pack, and the remaining positions are set as positions of slave battery packs; The quick-change battery pack plugged into the position of the master battery pack is set as the master battery pack, and a master BMS in the master battery pack is configured as a total BMS, which is used to control the at least two quick-change battery packs plugged into the electric vehicle; Based on the power supply demand of the electric vehicle and state information of the at least two quick-change battery packs, a power supply strategy of the electric vehicle is determined through a machine learning model, and the state information includes battery health information, remaining battery capacity and battery safety information of the at least two quick-change battery packs; Based on the power supply strategy, the at least two quick-change battery packs are controlled by the total BMS to jointly supply power, and the power supply strategy refers to a power supply current or a power supply voltage allocated to each of the at least two quick-change battery packs.

2. The method of claim 1, wherein, The quick-change battery pack includes a master BMS and at least one slave BMS, the master BMS works in a first state or a second state, the first state is control of the at least two quick-change battery packs, and the second state is control of the own quick-change battery pack; The slave BMS is used to obtain a plurality of state information of battery cells in the own quick-change battery pack, and the state information includes battery safety information.

3. The method of claim 1, wherein, The at least two quick-change battery packs are connected in parallel, and a total power supply current is equal to a sum of power supply currents of the at least two quick-change battery packs.

4. The method of claim 1, wherein, The master BMS of the at least two quick-change battery packs includes control software, which is used to determine a working mode of the quick-change battery pack based on a state of the electric vehicle and a state of the quick-change battery pack.

5. A control system for a fast-swap battery pack for an electric vehicle, characterized in that, The electric vehicle includes at least two positions of the quick-change battery pack, and the system includes: A setting module is configured to set one of the positions of the at least two quick-change battery packs as a position of a master battery pack, and set the remaining positions as positions of slave battery packs; A first control module is configured to set the quick-change battery pack plugged into the position of the master battery pack as the master battery pack, and configure a master BMS in the master battery pack as a total BMS, which is used to control the at least two quick-change battery packs plugged into the electric vehicle; A second control module is configured to determine a power supply strategy of the electric vehicle through a machine learning model based on a power supply demand of the electric vehicle and state information of the at least two quick-change battery packs, and determine a power supply strategy of the electric vehicle through a machine learning model based on a power supply demand of the electric vehicle and state information of the at least two quick-change battery packs, and the state information includes battery health information, remaining battery capacity and battery safety information of the at least two quick-change battery packs; and control the at least two quick-change battery packs to jointly supply power through the total BMS based on the power supply strategy, and the power supply strategy refers to a power supply current or a power supply voltage allocated to each of the at least two quick-change battery packs.

6. The system of claim 5, wherein, The quick-change battery pack comprises a master BMS and at least one slave BMS, the master BMS works in a first state or a second state, the first state is control of the at least two quick-change battery packs, and the second state is control of the self quick-change battery pack; The slave BMS is used to acquire a plurality of state information of the battery monomer in the self quick-change battery pack, and the state information comprises battery safety information.

7. A control device for an electric vehicle quick change battery pack, comprising a processor, wherein, The processor is used to execute the control method of the electric vehicle quick-change battery pack according to any one of claims 1-4. 8.A computer readable storage medium, the storage medium stores computer instructions, when a computer reads the computer instructions in the storage medium, the computer executes the control method of the electric vehicle quick-change battery pack according to any one of claims 1-4.

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