Charging current distribution method, controller and electric vehicle

Abstract

The disclosure provides a charging current distribution method, a controller and an electric vehicle. The charging method comprises the following steps: when M charging gun signals are detected simultaneously, the maximum allowable output current of each of the M charging guns and the charging gun usage of N charging piles connected with the M charging guns are acquired in real time, respectively, wherein M and N are both greater than or equal to 2, and M is greater than or equal to N; the maximum allowable charging current of the battery pack of the to-be-charged equipment is acquired in real time; and the charging current of the M charging guns is distributed according to the maximum allowable charging current, the maximum allowable output current of each of the M charging guns and the charging gun usage of the N charging piles. The method can reasonably distribute the charging current according to the equipment demand charging current size and the charging pile usage, can fully exert the charging capacity of the charging pile in the charging process, can shorten the charging time, and can realize reasonable arrangement of the charging pile resources and improve the high utilization rate of the charging pile.

Description

Technical Field

[0001] This disclosure relates to the field of charging technology, and in particular to a charging current distribution method, a controller, and an electric vehicle. Background Technology

[0002] Driven by the "dual carbon" goal, electric vehicles have achieved tremendous development, with their market share rising steadily. However, compared with traditional internal combustion engines, electric vehicles take longer to charge and have a poorer user experience, which affects customers' willingness to buy. Summary of the Invention

[0003] This disclosure aims to at least partially address one of the technical problems in the related art. To this end, this disclosure proposes a charging current distribution method, a controller, and an electric vehicle to maximize the capacity of the charging station during the charging process, shorten charging time, and improve the utilization rate of the charging station.

[0004] To achieve the above objectives, one embodiment of this disclosure proposes a charging method, which includes the following steps: when M charging gun signals are detected simultaneously, the maximum allowable output current of each of the M charging guns and the charging gun usage status of the N charging piles connected to the M charging guns are acquired in real time, wherein M and N are both greater than or equal to 2, and M is greater than or equal to N; the maximum allowable charging current of the battery pack of the device to be charged is acquired in real time; and charging current is allocated to the M charging guns according to the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage status of the N charging piles.

[0005] According to the charging current allocation method of the present disclosure, when multiple charging guns charge a device simultaneously, the charging current is allocated to the charging guns based on the maximum allowable charging current of the battery pack of the device to be charged, the capacity of the charging pile where the charging gun is located, and the usage of the charging gun, so as to reasonably allocate charging resources, maximize the capacity of the charging pile, and shorten the charging time.

[0006] To achieve the above objectives, a second aspect of this disclosure provides a controller including a memory, a processor, and a computer program stored in the memory, wherein when the computer program is executed by the processor, it implements the charging current distribution method described in any of the above embodiments.

[0007] To achieve the above objectives, a third aspect of this disclosure provides an electric vehicle, including a battery pack and a controller as described in the above embodiments.

[0008] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0009] Figure 1 This is a flowchart of a charging method according to an embodiment of the present disclosure;

[0010] Figure 2 This is a schematic diagram of a charging station with dual-gun charging according to a specific embodiment of the present disclosure;

[0011] Figure 3 This is a flowchart of step S3 of an embodiment of the present disclosure;

[0012] Figure 4 This is a flowchart of step S32, which is an example of this disclosure;

[0013] Figure 5 This is a flowchart of step S34, which is an example of this disclosure;

[0014] Figure 6 This is a structural block diagram of an electric vehicle according to an embodiment of the present disclosure. Detailed Implementation

[0015] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0016] The charging current distribution method, controller, and electric vehicle of the present disclosure are described below with reference to the accompanying drawings.

[0017] Figure 1 This is a flowchart of a charging current distribution method according to an embodiment of the present disclosure.

[0018] like Figure 1 As shown, the charging method of this disclosure includes the following steps:

[0019] S1, when M charging gun signals are detected simultaneously, the maximum allowable output current of each of the M charging guns and the charging gun usage status of the N charging piles connected to the M charging guns are obtained in real time, where M and N are both greater than or equal to 2, and M is greater than or equal to N.

[0020] In this embodiment, the charging method can be performed by the device to be charged (such as an electric vehicle). This device can have K charging ports, each used to connect to a charging gun in a charging pile, where K ≥ M. When the device is being charged by a charging pile, a charging gun is connected to a charging port. The controller (such as a battery manager) of the device can detect the connection status of the charging gun and communicate with the corresponding charging pile controller after confirming the connection. When the controller simultaneously detects signals from M charging guns, it can execute the charging method disclosed herein. Throughout the charging process, the maximum allowable output current of each of the M charging guns and the charging gun usage status of the N charging piles connected to the M charging guns can be acquired in real time.

[0021] It should be noted that the simultaneous detection of M charging gun signals mentioned above means that M charging guns are connected to the M charging ports of the device to be charged, and all are in a normal connection state.

[0022] S2, obtains the maximum allowable charging current of the battery pack of the device to be charged in real time.

[0023] As an example, the maximum allowable charging current of the battery pack of the device to be charged can be a fixed value, which can be pre-stored in the controller so that it can be retrieved when needed.

[0024] As another example, the maximum permissible charging current of the battery pack of the device to be charged can be a variable. For instance, obtaining the maximum permissible charging current of the battery pack could include: obtaining the state of charge (SOC) value and temperature value of the battery pack; and obtaining the maximum permissible charging current based on the SOC value and temperature value. In this example, the correspondence between the SOC value, temperature value, and maximum permissible charging current can be pre-stored for later retrieval when needed.

[0025] S3. Based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles, allocate charging current to the M charging guns.

[0026] In this embodiment, when allocating charging current to the M charging guns based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles, constraints such as short charging time, maximizing the charging capacity of the charging piles, and using fewer charging piles can be considered. Therefore, charging pile resources can be rationally allocated, the charging capacity of the charging piles can be fully utilized, charging time can be shortened, and the utilization rate of the charging piles can be improved.

[0027] In some embodiments, allocating charging current to the M charging guns based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles may include: comparing the maximum allowable output current of each of the M charging guns with the maximum allowable charging current; and allocating charging current to the M charging guns based on the comparison result and the charging gun usage of the N charging piles.

[0028] For example, when the maximum allowable charging current is less than the maximum allowable output current of any one of the M charging guns, then it is determined that any one of the M charging guns provides all the charging current required to charge the battery pack. In this case, the charging gun is controlled to charge the battery pack of the device to be charged, and the charging current can be the maximum allowable charging current of the battery pack, while the charging current of the other charging guns is 0.

[0029] Figure 2 This is a schematic diagram of a charging station with dual-gun charging according to a specific embodiment of this disclosure. The following is in conjunction with... Figure 2 The charging method provided in this disclosure is described below:

[0030] See Figure 2 M and N are both 2. The two charging piles are designated as the first charging pile 1 and the second charging pile 2. The first charging pile 1 has two charging guns, designated as the first charging gun 3 and the second charging gun 4. The second charging pile 2 has two charging guns, designated as the third charging gun 5 and the fourth charging gun 6. In this specific embodiment, the charging guns are used in the following ways:

[0031] Scenario 1: The second charging gun 4 and the third charging gun 5 are connected to the device to be charged, while the first charging gun 3 and the fourth charging gun 6 are in an idle state.

[0032] Scenario 2: The second charging gun 4 and the third charging gun 5 are connected to the device to be charged, the first charging gun 3 is connected to other charging devices, and the fourth charging gun 6 is in an idle state.

[0033] Scenario 3: The second charging gun 4 and the third charging gun 5 are connected to the device to be charged, the first charging gun 3 is idle, and the fourth charging gun 6 is connected to other charging devices.

[0034] Scenario 4: The second charging gun 4 and the third charging gun 5 are connected to the device to be charged, while the first charging gun 3 and the fourth charging gun 6 are connected to other charging devices.

[0035] In some embodiments, such as Figure 3 As shown, step S3 allocates charging current to the M charging guns based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles. This may include:

[0036] S31 determines the smaller and larger values ​​of the two maximum allowable output currents.

[0037] The maximum allowable output current refers to the maximum charging capacity that the corresponding charging gun can currently obtain from the charging pile. For example, in case 2, when the second charging gun is connected to the device to be charged, the first charging gun is already connected to other devices, and the first charging pile has allocated charging current to the first charging gun. In this case, the maximum charging capacity that the second charging gun can obtain, i.e., the maximum allowable output current, can be obtained by subtracting the charging capacity allocated to the first charging gun from the maximum charging capacity of the first charging pile.

[0038] S32, if the maximum allowable charging current is less than or equal to the smaller value, then determine the total charging current required to charge the battery pack by the second or third charging gun based on the usage of the charging guns of the N charging piles.

[0039] If the maximum allowable charging current is less than or equal to the smaller value, it means that a single charging pile can meet the charging needs of the device to be charged. Therefore, one charging pile can be released, which avoids occupying two charging piles, causing a waste of charging pile capacity, and improving the resource utilization rate of charging piles.

[0040] In this embodiment, the maximum allowable charging current is less than or equal to the smaller value. A typical application scenario for this is the end of the charging process, when the SOC is high and the battery pack temperature is high, and the maximum allowable charging current I of the battery pack is... pack-max Gradually decrease.

[0041] S33, if the maximum allowable charging current is greater than the smaller value and less than or equal to the larger value, then it is determined that the charging gun corresponding to the larger value will provide the total charging current required for charging the battery pack.

[0042] If the maximum allowable charging current is greater than the smaller value and less than or equal to the larger value, it means that the charging pile corresponding to the larger value can meet the charging needs of the device to be charged. Therefore, another charging pile can be released, which can avoid occupying two charging piles, causing a waste of charging pile capacity, and improving the resource utilization rate of charging piles.

[0043] S34. If the maximum allowable charging current is greater than the larger value and less than or equal to the sum of the two maximum allowable output currents, then the charging current is allocated to the second and third charging guns according to the usage of the charging guns of the N charging piles.

[0044] If the maximum allowable charging current is greater than the larger value but less than or equal to the sum of the two maximum allowable output currents, it indicates that two charging stations are needed to charge the device to shorten the charging time. Specifically, based on the usage of the charging guns on the N charging stations, the charging current can be intelligently allocated between the second and third charging guns to rationally allocate resources while ensuring that charging demand is met to the greatest extent possible, thereby maximizing the capacity of the charging stations.

[0045] S35, if the maximum allowable charging current is greater than the sum of the two maximum allowable output currents, then the charging current provided by the second charging gun and the third charging gun to charge the battery pack is determined to be the corresponding maximum allowable output current.

[0046] If the maximum allowable charging current is greater than the sum of the two maximum allowable output currents, it means that the maximum allowable charging current is relatively large. In this case, both the second and third charging guns need to output the charging current at full capacity to maximize the charging current and thus shorten the charging time.

[0047] Therefore, through the above steps S31-S35, charging pile resources can be rationally allocated, the charging capacity of charging piles can be fully utilized, charging time can be shortened, and the utilization rate of charging piles can be improved.

[0048] As an example, such as Figure 4 As shown, step S32 above, which determines the total charging current required for charging the battery pack by the second or third charging gun based on the usage of the charging gun, may include:

[0049] S321, if the charging gun usage of N charging piles is case 1, then it is determined that the charging gun corresponding to the smaller value will provide all the charging current required for charging the battery pack, and the provided charging current is the maximum allowable charging current.

[0050] By using the above allocation method, charging piles with larger charging capacity can be freed up, thereby freeing up more idle resources and avoiding the waste of charging pile resources caused by occupying two charging piles.

[0051] S322, if the charging guns of N charging piles are in situation 2 or situation 3, then it is determined that the charging guns sharing the charging pile with the charging guns in the idle state will provide all the charging current required for charging the battery pack, and the provided charging current is the maximum allowable charging current.

[0052] The above allocation method ensures that charging piles used by other devices can output full power, shortens the time that devices waiting to be charged use the charging piles, and increases the turnover speed of vehicles and charging piles.

[0053] S323, if the charging guns of N charging piles are used in situation 4, then the second or third charging gun will be randomly selected to provide the full charging current required for charging the battery pack, and the provided charging current will be the maximum allowable charging current.

[0054] In scenario 4, both charging stations are being used by other devices. In this case, you can randomly select one charging station to allocate the charging current, which can avoid occupying both charging stations and wasting charging station resources.

[0055] Optionally, when the charging current is provided by one charging gun of a charging pile, the device to be charged can be controlled to issue a prompt message to remind the user to unplug the other charging gun so that it can be used by other devices.

[0056] As an example, such as Figure 5 As shown, if the smaller value is the maximum allowable output current of the second charging pile, then the process in step S34 above, which allocates charging current to the second and third charging guns based on the usage of the charging guns of the N charging piles, may include:

[0057] S341, if the charging guns of N charging piles are used in situation 2, then the charging current provided by the second charging gun is determined to be I. pack-max -I 2-max The charging current provided by the third charging gun is I. 2-max , among which, I pack-max Indicates the maximum allowable charging current, I 2-max This indicates the maximum allowable output current of the third charging gun.

[0058] The above allocation method can fully utilize the charging capacity of the second charging pile, and the second charging pile can only charge the device to be charged, which facilitates the management of the second charging pile.

[0059] S342, if the charging guns of N charging piles are used in situation 3, then the charging current provided by the second charging gun is determined to be I. 1-max The charging current provided by the third charging gun is I. pack-max -I 1-max , among which, I 1-max This indicates the maximum permissible output current of the second charging gun.

[0060] The above allocation method can fully utilize the charging capacity of the first charging pile, and the first charging pile can only charge the device to be charged, which facilitates the management of the first charging pile.

[0061] S343, if the charging guns of N charging piles are used in either case 1 or case 4, then the allocation coefficient k is calculated based on the maximum allowable charging current and the two maximum allowable output currents, and the charging current provided by the second and third charging guns is determined based on the allocation coefficient k.

[0062] Specifically, the charging current provided by the charging gun corresponding to the larger value can be allocated as k*I. pack-max The charging current provided by the charging gun corresponding to the smaller value is (1-k)*I. pack-max At this point, while ensuring the total current demand is met, charging is rationally allocated through a distribution coefficient to achieve high utilization of the charging pile. Specifically, the larger the value of k, the greater the charging current provided by the charging gun corresponding to that larger value, thus utilizing the charging capacity of the charging pile corresponding to that larger value.

[0063] As an example, when the larger value corresponds to the second charging gun, the range of values ​​for the allocation coefficient k is: Among them, I 1-max I represents the maximum allowable output current of the second charging gun. 2-max This represents the maximum allowable output current of the third charging gun, and k represents the allocation coefficient.

[0064] In summary, the charging current allocation method proposed in this disclosure allows for charging with a single charging gun when the device requires a relatively small charging current, while other charging guns can release a larger current, avoiding the waste of two charging piles. When the device requires a relatively large charging current, the charging current is intelligently allocated based on the usage of the charging guns, maximizing the fulfillment of the charging current requirement while minimizing the resource occupation of charging piles used by other devices, shortening the time the device uses the charging pile, maximizing the charging pile's capacity, and achieving high utilization of the charging pile.

[0065] Based on the above-described charging current distribution method, this disclosure proposes a controller.

[0066] In this embodiment, the controller includes a memory, a processor, and a computer program stored in the memory. When the computer program is executed by the processor, it implements the charging current distribution method described in any of the above embodiments.

[0067] This disclosure also proposes an electric vehicle.

[0068] Figure 6 This is a structural block diagram of an electric vehicle according to an embodiment of the present disclosure.

[0069] like Figure 6 As shown, the electric vehicle 100 includes a battery pack 10 and a controller 20 as described in the above embodiment.

[0070] Furthermore, the controller and other components and functions of the electric vehicle in the embodiments of this disclosure are known to those skilled in the art, and will not be described in detail here to reduce redundancy.

[0071] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). Furthermore, the computer-readable medium can even be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0072] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0073] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0074] In the description of this disclosure, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this disclosure and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this disclosure.

[0075] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0076] In this disclosure, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this disclosure according to the specific circumstances.

[0077] In this disclosure, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0078] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A charging current distribution method, characterized in that, The method includes the following steps: When M charging gun signals are detected simultaneously, the maximum allowable output current of each of the M charging guns and the charging gun usage status of the N charging piles connected to the M charging guns are obtained in real time, wherein M and N are both greater than or equal to 2, and M is greater than or equal to N. Real-time acquisition of the maximum allowable charging current of the battery pack of the device to be charged; Based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles, the charging current is allocated to the M charging guns.

2. The charging current distribution method as described in claim 1, characterized in that, The step of allocating charging current to the M charging guns based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles includes: Compare the maximum allowable output current of each of the M charging guns with the maximum allowable charging current. Based on the comparison results and the usage of the charging guns of the N charging piles, charging current is allocated to the M charging guns.

3. The charging current distribution method as described in claim 2, characterized in that, When the maximum allowable charging current is less than the maximum allowable output current of any one of the M charging guns, then it is determined that any one of the M charging guns provides all the charging current required to charge the battery pack.

4. The charging current distribution method as described in claim 1, characterized in that, Both M and N are 2. The two charging piles are designated as the first charging pile and the second charging pile. The first charging pile has two charging guns, designated as the first charging gun and the second charging gun. The second charging pile has two charging guns, designated as the third charging gun and the fourth charging gun. The usage of the charging guns includes: Scenario 1: The second charging gun and the third charging gun are connected to the device to be charged, while the first charging gun and the fourth charging gun are in an idle state; Scenario 2: The second charging gun and the third charging gun are connected to the device to be charged, the first charging gun is connected to other charging devices, and the fourth charging gun is in an idle state; Scenario 3: The second charging gun and the third charging gun are connected to the device to be charged, the first charging gun is in an idle state, and the fourth charging gun is connected to other charging devices; Scenario 4: The second charging gun and the third charging gun are connected to the device to be charged, and the first charging gun and the fourth charging gun are connected to other charging devices.

5. The charging current distribution method as described in claim 1, characterized in that, The step of obtaining the maximum allowable charging current of the battery pack of the device to be charged includes: Obtain the state of charge and temperature values ​​of the battery pack; The maximum allowable charging current is obtained based on the state of charge value and the temperature value.

6. The charging current distribution method as described in claim 4, characterized in that, The step of allocating charging current to the M charging guns based on the maximum allowable charging current, the maximum allowable output current of each of the M charging guns, and the charging gun usage of the N charging piles includes: Determine the smaller and larger values ​​of the two maximum allowable output currents; If the maximum allowable charging current is less than or equal to the smaller value, then the second charging gun or the third charging gun shall provide the full charging current required for charging the battery pack, based on the usage of the charging guns of the N charging piles. If the maximum allowable charging current is greater than the smaller value and less than or equal to the larger value, then it is determined that the charging gun corresponding to the larger value will provide all the charging current required to charge the battery pack. If the maximum allowable charging current is greater than the larger value and less than or equal to the sum of the two maximum allowable output currents, then the charging current is allocated to the second charging gun and the third charging gun according to the usage of the charging guns of the N charging piles. If the maximum allowable charging current is greater than the sum of the two maximum allowable output currents, then the charging current provided by the second charging gun and the third charging gun to charge the battery pack is determined to be the corresponding maximum allowable output current.

7. The charging current distribution method as described in claim 6, characterized in that, The step of determining, based on the usage of the charging guns of the N charging piles, whether the second charging gun or the third charging gun should provide the total charging current required for charging the battery pack includes: If the charging gun usage of the N charging piles is as described in case 1, then it is determined that the charging gun corresponding to the smaller value will provide all the charging current required for charging the battery pack, and the provided charging current is the maximum allowable charging current. If the charging guns of the N charging piles are in situation 2 or situation 3, then it is determined that the charging guns sharing the charging pile with the charging guns in the idle state will provide all the charging current required for charging the battery pack, and the provided charging current is the maximum allowable charging current. If the charging guns of the N charging piles are used in situation 4, then it is randomly determined that the second charging gun or the third charging gun will provide the full charging current required to charge the battery pack, and the provided charging current is the maximum allowable charging current.

8. The charging current distribution method as described in claim 6, characterized in that, The step of allocating charging current to the second charging gun and the third charging gun based on the usage status of the charging guns of the N charging piles includes: If the charging guns of the N charging piles are used in situation 2, then the charging current provided by the second charging gun is determined to be I. pack-max -I 2-max The charging current provided by the third charging gun is I. 2-max , among which, I pack-max I represents the maximum allowable charging current. 2-max This indicates the maximum permissible output current of the third charging gun; If the charging guns of the N charging piles are used in situation 3, then the charging current provided by the second charging gun is determined to be I. 1-max The charging current provided by the third charging gun is I. pack-max -I 1-max , among which, I 1-max This indicates the maximum allowable output current of the second charging gun; If the charging guns of the N charging piles are used in either case 1 or case 4, then the allocation coefficient is obtained based on the maximum allowable charging current and the two maximum allowable output currents, and the charging current provided by the second charging gun and the third charging gun is determined based on the allocation coefficient.

9. The charging current distribution method as described in claim 8, characterized in that, Determining the charging current provided by the second charging gun and the third charging gun according to the allocation coefficient includes: The charging current provided by the charging gun corresponding to the larger value is determined to be k*I. pack-max The charging current provided by the charging gun corresponding to the smaller value is (1-k)*I. pack-max , where k represents the allocation coefficient.

10. The charging current distribution method as described in claim 8 or 9, characterized in that, When the charging gun corresponding to the larger value is the second charging gun, the range of the allocation coefficient is: Among them, I 1-max I represents the maximum allowable output current of the second charging gun. 2-max The maximum allowable output current of the third charging gun is represented by k, and the allocation coefficient is represented by k.

11. A controller, characterized in that, It includes a memory, a processor, and a computer program stored in the memory, which, when executed by the processor, implements the charging current distribution method as described in any one of claims 1-10.

12. An electric vehicle, characterized in that, include: The battery pack and the controller as described in claim 11.

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