Multi-pile charging control method and device, vehicle, medium and program product

Abstract

The invention provides a multi-pile charging control method and device, a vehicle, a medium and a program product, and relates to a battery management system technology. The method comprises the steps that under the condition that parameter configuration of a plurality of charging piles is completed, request current is sent to each charging pile in the plurality of charging piles according to battery pack demand current of a vehicle and the number of the charging piles; the actual output capacity of each charging pile is obtained; and dynamically adjusting the request current of each charging pile according to the actual output capability of each charging pile.

Description

Technical Field

[0001] The present disclosure relates to battery management system technology, and more particularly to a multi-pile charging control method, device, vehicle, medium and program product. Background Art

[0002] With the improvement of battery life of new energy vehicles, especially commercial vehicles, the increasing voltage platform of battery packs and the increasing number of parallel battery packs, the charging method of a single charging pile can no longer meet the charging performance requirements, so a dual-pile charging design has emerged on the market. However, this design has problems with charging compatibility, charging current distribution and charging safety, which often results in the inability to charge at multiple piles or the charging time is too long, which in turn leads to low charging efficiency. Summary of the invention

[0003] A technical problem to be solved by the present disclosure is to provide a multi-pile charging control method, device, vehicle, medium and program product, which can utilize the maximum charging capacity of each charging pile to improve the charging efficiency.

[0004] According to one aspect of the present disclosure, a multi-pile charging control method is proposed, including: when multiple charging piles have completed parameter configuration, sending a request current to each of the multiple charging piles according to the battery pack demand current of the vehicle and the number of charging piles; obtaining the actual output capacity of each charging pile; and dynamically adjusting the request current of each charging pile according to the actual output capacity of each charging pile.

[0005] In some embodiments, obtaining the actual output capacity of each charging pile includes: for the kth charging pile among multiple charging piles, after the stable output current of the kth charging pile, determining whether the actual output current of the kth charging pile is less than the requested current, wherein k is greater than or equal to 1 and less than N, and N is the number of charging piles; if the actual output current of the kth charging pile is less than the requested current, determining that the actual output capacity of the kth charging pile is the actual output current; and if the actual output current of the kth charging pile is equal to the requested current, determining that the actual output capacity of the kth charging pile is the maximum allowable charging current of the kth charging pile.

[0006] In some embodiments, dynamically adjusting the requested current of each charging pile includes: for a kth charging pile among multiple charging piles, when the actual output current of the kth charging pile is greater than or equal to a first threshold, determining whether the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, wherein k is a natural number greater than or equal to 1 and less than N, and N is the number of charging piles; and when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and the actual output capacities of other charging piles among the multiple charging piles are equal to the maximum allowable charging current of the corresponding charging piles, maintaining the requested current of the kth charging pile.

[0007] In some embodiments, dynamically adjusting the requested current of each charging pile also includes: when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and there is a charging pile among the multiple charging piles whose actual output capacity is less than the maximum allowable charging current of the corresponding charging pile, increasing the requested current of the kth charging pile.

[0008] In some embodiments, dynamically adjusting the requested current of each charging pile further includes: when the actual output capacity of the kth charging pile is less than the maximum allowable charging current of the kth charging pile, maintaining the requested current of the kth charging pile.

[0009] In some embodiments, dynamically adjusting the requested current of each charging pile further includes: disconnecting the kth charging pile when the actual output current of the kth charging pile is less than a first threshold.

[0010] In some embodiments, when there is a charging pile for which parameter configuration has not been completed among the multiple charging piles, the requested current sent to each charging pile is less than the second threshold.

[0011] In some embodiments, sending a request current to each of a plurality of charging piles based on the battery pack demand current and the number of charging piles includes: determining an average output current of each charging pile based on the battery pack demand current and the number of charging piles; and sending a request current to each charging pile based on the average output current.

[0012] In some embodiments, the sum of the requested currents of the multiple charging piles is dynamically adjusted according to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack.

[0013] In some embodiments, based on the relationship between the currents output by multiple charging piles received by the battery pack and the current required by the battery pack, dynamically adjusting the sum of the requested currents of multiple charging piles includes: when the sum of the currents output by the multiple charging piles received by the battery pack and a third threshold is less than the current required by the battery pack, increasing the sum of the requested currents of the multiple charging piles based on a fourth threshold at predetermined intervals, and judging whether the sum of the currents output by the multiple charging piles received by the battery pack and a fifth threshold is greater than the current required by the battery pack, wherein the fifth threshold is less than the third threshold; and when the sum of the currents output by the multiple charging piles received by the battery pack and the fifth threshold is less than or equal to the current required by the battery pack, increasing the sum of the requested currents of the multiple charging piles based on the fourth threshold at predetermined intervals.

[0014] In some embodiments, dynamically adjusting the sum of the requested currents of multiple charging piles based on the relationship between the currents output by multiple charging piles received by the battery pack and the current required by the battery pack also includes: when the sum of the currents output by the multiple charging piles received by the battery pack and a fifth threshold is greater than the current required by the battery pack, judging whether the currents output by the multiple charging piles received by the battery pack are greater than the current required by the battery pack; when the currents output by the multiple charging piles received by the battery pack are greater than the current required by the battery pack, reducing the sum of the requested currents of the multiple charging piles based on the sixth threshold at predetermined intervals; and when the currents output by the multiple charging piles received by the battery pack are equal to the current required by the battery pack, maintaining the sum of the requested currents of the multiple charging piles at the previous moment.

[0015] In some embodiments, the actual output current of the kth charging pile is obtained by a current detection device provided on a charging circuit of a charging port connected to the kth charging pile.

[0016] According to another aspect of the present disclosure, a multi-pile charging control device is also proposed, including: a sending module, configured to send a request current to each of the multiple charging piles according to the battery pack demand current of the vehicle and the number of charging piles when the parameter configuration of the multiple charging piles is completed; a capacity acquisition module, configured to obtain the actual output capacity of each charging pile; and an adjustment module, configured to dynamically adjust the request current of each charging pile according to the actual output capacity of each charging pile.

[0017] According to another aspect of the present disclosure, a multi-pile charging control device is further provided, comprising: a memory; and a processor coupled to the memory, wherein the processor is configured to execute the multi-pile charging control method as described above based on instructions stored in the memory.

[0018] According to another aspect of the present disclosure, a vehicle is further provided, comprising: the above-mentioned multi-pile charging control device.

[0019] According to another aspect of the present disclosure, a computer-readable storage medium is further provided, on which computer program instructions are stored, and when the instructions are executed by a processor, the multi-pile charging control method as described above is implemented.

[0020] According to another aspect of the present disclosure, a computer program product is also provided, including a computer program, and when the computer program is executed by a processor, the multi-pile charging control method described above is implemented.

[0021] In the disclosed embodiment, when a vehicle battery pack is charged at multiple charging stations, it is necessary to complete the parameter configuration of all charging stations before sending a request current to each charging station, and dynamically allocate the charging current according to the actual output capacity of each charging station, thereby utilizing the maximum charging capacity of each charging station, improving the charging efficiency, and reducing the problem of normal charging failure due to voltage mismatch and even damage to the charging station or the vehicle's high-voltage charging circuit.

[0022] Other features and advantages of the present disclosure will become apparent from the following detailed description of exemplary embodiments of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0024] The present disclosure may be more clearly understood from the following detailed description with reference to the accompanying drawings, in which:

[0025] Figure 1 It is a flowchart of some embodiments of the multi-pile charging control method disclosed in the present invention;

[0026] Figure 2 Schematic diagram of the flow chart of other embodiments of the multi-pile charging control method disclosed in the present invention;

[0027] Figure 3 Schematic diagram of the flow chart of other embodiments of the multi-pile charging control method disclosed in the present invention;

[0028] Figure 4 Schematic diagram of the flow chart of other embodiments of the multi-pile charging control method disclosed in the present invention;

[0029] Figure 5 It is a schematic diagram of the structure of some embodiments of the multi-pile charging control device disclosed in the present invention;

[0030] Figure 6 Schematic diagrams of the structures of other embodiments of the multi-pile charging control device disclosed in the present invention. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present disclosure unless otherwise specifically stated.

[0032] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0033] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present disclosure, its application, or uses.

[0034] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered as part of the specification.

[0035] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0036] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0037] In order to make the objectives, technical solutions and advantages of the present disclosure more clearly understood, the present disclosure is further described in detail below in combination with specific embodiments and with reference to the accompanying drawings.

[0038] Figure 1 The flowchart of some embodiments of the multi-pile charging control method disclosed in the present invention is performed by a BMS (Battery Management System), including steps S11-S13. In this embodiment, the vehicle is provided with multiple charging ports, such as multiple fast charging ports. Each charging port has an independent charging circuit, which is, for example, a fast charging circuit, which is connected in parallel to the high-voltage bus of the battery pack. Each fast charging circuit is provided with a current detection device, which can detect the actual current size of the current fast charging circuit, that is, detect the current actually output by the charging pile connected to the charging port.

[0039] The charging port is equipped with an independent CAN (Controller Area Network) communication port, so that the BMS can communicate with the charging port. The charging port is also equipped with CC2 (a signal line in the fast charging interface) to detect the connection status between the charging gun and the vehicle charging socket. The charging port can also be equipped with an A+ detection circuit.

[0040] In step S11, when parameter configuration of multiple charging piles is completed, a request current is sent to each of the multiple charging piles according to the battery pack demand current of the vehicle and the number of charging piles.

[0041] After all charging piles have completed parameter configuration, multi-pile charging can be performed, and each charging circuit is closed. Multi-pile charging is, for example, dual-pile charging, that is, there are two charging piles charging the battery pack of the vehicle. Those skilled in the art will know that with the development of technology, a larger number of charging piles can be used to charge the battery pack of the vehicle.

[0042] In some embodiments, the average output current of each charging pile is determined according to the required current of the battery pack and the number of charging piles; and a request current is sent to each charging pile according to the average output current.

[0043] For example, when the charging pile starts charging, the BMS controls the circuits of each charging port to receive the output of each charging pile on average to ensure balanced charging of each charging pile and improve the charging efficiency of the battery pack. If there are N charging piles and the battery pack demand current is I, the requested current of each charging pile is I / N.

[0044] In step S12, the actual output capacity of each charging pile is obtained.

[0045] As the charging piles are used, the actual output capacity of each charging pile may be different. Therefore, after each charging pile outputs a stable current, it is necessary to identify the actual output capacity of each charging pile.

[0046] In some embodiments, for the kth charging pile among multiple charging piles, after the stabilization output current of the kth charging pile, it is determined whether the actual output current of the kth charging pile is less than the requested current, where k is greater than or equal to 1 and less than N, and N is the number of charging piles; if the actual output current of the kth charging pile is less than the requested current, the actual output capacity of the kth charging pile is determined to be the actual output current; and if the actual output current of the kth charging pile is equal to the requested current, the actual output capacity of the kth charging pile is determined to be the maximum allowable charging current of the kth charging pile.

[0047] For example, the actual output current of the kth charging pile is M(k), and the requested current of each charging pile is I(k)=I / N. If M(k)<I(k), it means that the actual current output capacity of the kth charging pile is M(k); otherwise, it means that the actual current output capacity of the kth charging pile is CML(k), where CML(k) is the maximum allowable charging current.

[0048] In some embodiments, the actual output current of the kth charging pile is obtained by a current detection device provided on the charging circuit of the charging port connected to the kth charging pile. In the related art, each fast charging circuit lacks an independent current sensor, so it is impossible to detect the actual output capacity of each pile separately. In this embodiment, since each fast charging circuit is provided with a current sensor, the actual output current of each charging pile can be detected.

[0049] In step S13, the requested current of each charging pile is dynamically adjusted according to the actual output capacity of each charging pile.

[0050] In this step, the charging current of the charging piles is dynamically allocated according to the actual output capacity of the charging piles, so as to fully utilize the maximum charging capacity of each charging pile.

[0051] In the above embodiment, when there are multiple charging piles for the vehicle battery pack, it is necessary to send a request current to each charging pile after the parameter configuration of all charging piles is completed, and the charging current is dynamically allocated according to the actual output capacity of each charging pile, so as to utilize the maximum charging capacity of each charging pile, improve the charging efficiency, and reduce the problem of normal charging failure due to voltage mismatch and even damage to the charging pile or the vehicle's high-voltage charging circuit.

[0052] In some embodiments of the present disclosure, for a kth charging pile among multiple charging piles, when the actual output current of the kth charging pile is greater than or equal to a first threshold, it is determined whether the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile; and when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and the actual output capacities of other charging piles among the multiple charging piles are equal to the maximum allowable charging current of the corresponding charging piles, the requested current of the kth charging pile is maintained.

[0053] For example, the first threshold value is 5A. Those skilled in the art should understand that the setting of the first threshold here is only for example and can be set according to actual conditions. The first threshold is used to identify whether the charging capacity of the charging pile is too low.

[0054] If the actual output current of the kth charging pile is greater than or equal to 5A, it is further determined whether the actual output capacity of the kth charging pile is equal to CML (k). If so, it is determined whether the actual output capacity of other charging piles is equal to the corresponding maximum allowable charging current. If so, it means that all charging piles are in the maximum charging capacity state. At this time, there is no need to adjust the requested current of each charging pile.

[0055] In some embodiments, when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and there is a charging pile among the multiple charging piles whose actual output capacity is less than the maximum allowable charging current of the corresponding charging pile, the requested current of the kth charging pile is increased.

[0056] For example, if the actual output capacity of the kth charging pile is equal to CML(k), but the actual output capacity of other charging piles can reach the maximum allowable charging current, the requested current of the kth charging pile needs to be increased to ensure the charging efficiency of the vehicle battery pack.

[0057] In some embodiments, when the actual output capacity of the kth charging pile is less than the maximum allowed charging current of the kth charging pile, the requested current of the kth charging pile is maintained.

[0058] For example, if the actual output capacity of the kth charging pile does not meet the maximum allowable charging current of the charging pile, it means that the charging efficiency of the charging pile is not high. At this time, there is no need to adjust the requested current of the charging pile. The charging efficiency of the entire charging pile can be improved by increasing the requested current of other charging piles.

[0059] In some embodiments, when the actual output current of the kth charging pile is less than a first threshold, the connection with the kth charging pile is disconnected.

[0060] For example, each charging circuit has an independent switch circuit, and the BMS can cut off the connection between the charging pile and the charging circuit by controlling the switch circuit. If the actual output current of the kth charging pile is less than 5A, it means that the output capacity of the charging pile is low or it cannot output current. In this case, it is necessary to cut off the connection between the charging pile and the corresponding charging circuit to avoid the problem that the charging pile continues to occupy the muzzle resources and causes a slow charging rate.

[0061] Since each charging circuit is equipped with an independent switching circuit, during the charging process of the battery pack, the upper and lower guns can be switched arbitrarily without affecting the normal output of other charging piles.

[0062] The following will take a specific embodiment as an example to illustrate the implementation process of dynamically adjusting the requested current of each charging pile. Figure 2 As shown, Figure 2 1 is a flowchart of other embodiments of the multi-pile charging control method disclosed in the present invention, including steps S21-S210.

[0063] In step S21, the vehicle is charged with N charging piles simultaneously.

[0064] In step S22 , the requested current sent to the kth charging pile is I(k)=I / N.

[0065] In step S23, determine whether the current of the fast charging circuit k is stable. If not, execute step S24. If stable, continue to execute step S23.

[0066] In step S24, the actual output capacity of the kth charging pile is identified.

[0067] In step S25, it is determined whether the actual output current of the k-th charging pile is less than 5A. If so, step S26 is executed; otherwise, step S27 is executed.

[0068] In step S26, the connection between the kth charging pile and the corresponding fast charging circuit is stopped.

[0069] In some embodiments, the charging capacity of the charging pile is too low, prompting the user that the charging pile is abnormal and that charging with the charging pile should be stopped.

[0070] In some embodiments, a warning light is set in the charging circuit, and the warning light can display different colors. Different colors represent different states of the charging pile. For example, the charging pile includes normal charging state, abnormal exit charging state, charging completion state, and charging pile power too low state.

[0071] If the connection between the charging pile and the corresponding fast charging circuit is stopped, the requested current of other charging piles needs to be compensated. For example, in the case of two charging piles, if the first charging pile has no current output and the second charging pile is in a normal state, a requested current of (I / 2+I / 2) needs to be sent to the second charging pile to avoid affecting the overall charging efficiency of the vehicle.

[0072] In step S27 , it is determined whether the actual output capacity of the k-th charging pile is equal to CML(k). If not, step S28 is executed. If so, step S29 is executed.

[0073] In step S28, the requested current of the kth charging pile is maintained, and the sum of the requested currents of all charging piles is increased.

[0074] For example, in the case of two charging piles, if the actual output capacity of the first charging pile has not reached the maximum value, but the charging capacity of the second charging pile has reached the maximum value, the requested current of the second charging pile is increased to (I(k)+I(k)-M(k)).

[0075] In step S29, it is determined whether it is necessary to increase the sum of the requested currents of all charging piles. If so, step S210 is executed; otherwise, step S23 is continued.

[0076] For example, although the actual output capacity of the k-th charging pile meets the maximum value, there are other charging piles that do not meet the maximum value, so the requested current of the k-th charger needs to be increased.

[0077] In step S210 , the requested current of the kth charger is increased.

[0078] For example, in the case of two charging piles, if the actual output capacity of the first charging pile reaches the maximum value, but the charging capacity of the second charging pile does not reach the maximum value, the requested current of the first charging pile is increased to (I(k)+I(k)-M(k)).

[0079] In the above embodiment, in multi-pile charging, the actual output capacity of each charging pile is dynamically identified through the actual charging current of each charging circuit, and then the output current of the charging pile is dynamically allocated according to the actual output capacity of the charging pile, with stronger real-time adjustability, so as to make full use of the maximum output capacity of each charging pile, increase the upper limit of the battery pack charging capacity, and improve the charging efficiency.

[0080] In some embodiments of the present disclosure, when there is a charging pile for which parameter configuration has not been completed among the plurality of charging piles, the requested current sent to each charging pile is less than the second threshold.

[0081] For example, the second threshold value is 5A. Those skilled in the art should understand that the value of the second threshold value here is only used as an example and can be set according to actual conditions.

[0082] After any charging circuit enters the charging capacity transmission stage in advance, the BMS maintains a minimum charging current of 5A for all charging piles until all charging circuits are closed and the BMS's request current for the charging piles returns to normal at a certain rate.

[0083] In the case of charging piles with incomplete parameter configuration, the total current flowing into the current pack is kept at a smaller value, which can avoid the impact of large current on the battery pack when other charging piles are added, and reduce the probability of battery pack damage.

[0084] The following describes the collaborative charging process of multiple charging piles using a specific embodiment as an example. Figure 3 As shown, Figure 3 1 is a flowchart of other embodiments of the multi-pile charging control method disclosed in the present invention. This embodiment takes two charging piles as an example and includes steps S31-S38.

[0085] In step S31, the vehicle is charged with two charging piles at the same time.

[0086] In some embodiments, after the BMS recognizes that multiple fast-charging port charging guns are connected and receives fast-charging handshake messages from multiple charging piles, the charging piles enter a multi-pile ready collaborative state.

[0087] In step S32, the first charging pile parameters are configured.

[0088] In step S33, it is determined whether the second charging pile parameters have been configured. If so, step S38 is executed; otherwise, step S34 is executed.

[0089] In step S34, a ready status message is sent to the first charging pile.

[0090] In step 35, it is determined whether the accumulated time for waiting for the second charging pile parameter configuration exceeds 20 seconds. If so, step S36 is executed; otherwise, step S33 is continued.

[0091] In step S36, a minimum requested current of 5A is sent to the first charging pile.

[0092] In step S37, it is determined whether the second charging pile parameters have been configured. If so, step S38 is executed; otherwise, step S36 is continued.

[0093] In step S38, the first fast charging circuit and the second fast charging circuit on the vehicle side are closed, a ready status message is sent to the second charging pile, and a normal request current is sent to the first charging pile and the second charging pile.

[0094] For example, if the total current demand of the vehicle battery pack is I, the normal requested current is I / 2.

[0095] In the above embodiment, when the BMS enters the multi-pile ready coordination state, it needs to wait for all charging piles to complete parameter configuration and close all fast charging circuits at the same time. If there are charging piles that have not completed parameter configuration, the BMS will maintain the minimum charging current of 5A for all charging piles until all charging circuits are closed. The BMS request current for the charging piles is restored to the normal value at a certain rate. This is to avoid the phenomenon that the charging pile or the high-voltage charging circuit of the vehicle cannot be charged normally or even damaged due to problems such as voltage mismatch or external current shock at the time of relay action.

[0096] In some embodiments of the present disclosure, there may be a problem of load consumption when a vehicle is charging at multiple charging piles. Therefore, the BMS also needs to dynamically adjust the requested current of each charging pile.

[0097] For example, according to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack, the sum of the requested currents of the multiple charging piles is dynamically adjusted.

[0098] When the current input to the battery pack does not match the current required by the battery pack, the sum of the requested currents of the charging pile needs to be dynamically adjusted. The current input to the battery pack can be determined by detecting the current of the charging circuit of each charging port.

[0099] In some embodiments, when the sum of the currents output by multiple charging piles received by the battery pack and a third threshold is less than the current required by the battery pack, the sum of the requested currents of the multiple charging piles is increased based on the fourth threshold at predetermined intervals, and it is determined whether the sum of the currents output by the multiple charging piles received by the battery pack and a fifth threshold is greater than the current required by the battery pack, wherein the fifth threshold is less than the third threshold; and when the sum of the currents output by multiple charging piles received by the battery pack and the fifth threshold is less than or equal to the current required by the battery pack, the sum of the requested currents of the multiple charging piles is increased based on the fourth threshold at predetermined intervals.

[0100] The third threshold is, for example, 10A, the fourth threshold is, for example, a value less than 10A, and the fifth threshold is, for example, 5A. Those skilled in the art should understand that the values ​​of the third threshold, the fourth threshold and the fifth threshold are only for example and can be set according to actual conditions.

[0101] For example, if the charging current +10A received by the battery pack is less than the target current, that is, the battery pack demand current, it means that the vehicle has load consumption, and the requested current of the charging pile can be compensated every 2 seconds. The requested current refers to the sum of the requested currents of multiple charging piles, with a maximum increase of 10A each time. The specific step size of increasing the requested current can be set according to actual conditions.

[0102] After compensating the requested current, if the charging current +5A received by the battery pack is less than or equal to the target current, it means that the requested current needs to be supplemented. Therefore, the requested current can continue to be compensated every 2 seconds.

[0103] In some embodiments, when the sum of the currents output by multiple charging piles received by the battery pack and a fifth threshold is greater than the current required by the battery pack, it is determined whether the currents output by the multiple charging piles received by the battery pack are greater than the current required by the battery pack; when the currents output by multiple charging piles received by the battery pack are greater than the current required by the battery pack, the sum of the requested currents of the multiple charging piles is reduced based on the sixth threshold at predetermined intervals; and when the currents output by multiple charging piles received by the battery pack are equal to the current required by the battery pack, the sum of the requested currents of the multiple charging piles at the previous moment is maintained.

[0104] For example, if the charging current +5A received by the battery pack is greater than the target current, it means that the battery pack has met the demand current requirement at this time, and it is necessary to further determine whether the charging current received by the battery pack is greater than the target current. If so, it is necessary to reduce the requested current every 2 seconds. For example, the requested current step size of each reduction is obtained based on the actual charging current received by the battery pack - the sum of the requested currents of multiple charging piles at the previous moment + 3A. If it is identified that the charging current received by the battery pack is less than or equal to the target current, the sum of the requested currents of multiple charging piles at the previous moment is maintained.

[0105] In the above embodiment, the sum of the requested currents of the multiple charging piles is dynamically adjusted based on the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack. This can reduce the problem of low charging efficiency of the battery pack caused by external current shocks or load consumption, and reduce the charging time.

[0106] The following will take a specific embodiment as an example to introduce the process of adaptive dynamic adjustment of the requested current when there is load consumption during the multi-pile charging process of the vehicle. Figure 4 As shown, Figure 4 1 is a flowchart of other embodiments of the multi-pile charging control method disclosed in the present invention, including steps S41-S47.

[0107] In step S41, it is determined whether the actual charging current +10A of the battery pack is less than the target current. If not, step S42 is executed. If so, step S43 is executed.

[0108] In step S42 , the sum of the requested currents of the multiple charging piles is not compensated.

[0109] In step S43, the sum of the requested currents of the multiple charging piles is compensated every 2 seconds, and the compensation value does not exceed 10A.

[0110] In step S44, it is determined whether the actual charging current +5A of the battery pack is greater than the target current. If so, step S45 is executed; otherwise, step S43 is continued.

[0111] In step S45, the compensation current value is kept at the previous value.

[0112] In step S46, it is determined whether the actual charging current of the battery pack is greater than the target current. If so, step S47 is executed; otherwise, step S45 is executed.

[0113] In step S47, the sum of the requested currents of the multiple charging piles is reduced every 2 seconds. Then, step S41 is continued.

[0114] In the above embodiment, current compensation is performed during the vehicle charging process, which can ensure that the battery pack is always charged with the maximum current, thereby improving the charging efficiency and saving the charging time.

[0115] Figure 5 Schematic diagram of the structure of some embodiments of the multi-pile charging control device disclosed in the present invention. The multi-pile charging control device is, for example, a BMS, including a sending module 510 , a capability acquisition module 520 and an adjustment module 530 .

[0116] The sending module 510 is configured to send a request current to each of the multiple charging piles according to the battery pack required current of the vehicle and the number of charging piles when the multiple charging piles have completed parameter configuration.

[0117] In some embodiments, the average output current of each charging pile is determined according to the required current of the battery pack and the number of charging piles; and a request current is sent to each charging pile according to the average output current.

[0118] The capability acquisition module 520 is configured to acquire the actual output capability of each charging post.

[0119] In some embodiments, for the kth charging pile among multiple charging piles, after the stabilization output current of the kth charging pile, it is determined whether the actual output current of the kth charging pile is less than the requested current, where k is greater than or equal to 1 and less than N, and N is the number of charging piles; if the actual output current of the kth charging pile is less than the requested current, the actual output capacity of the kth charging pile is determined to be the actual output current; and if the actual output current of the kth charging pile is equal to the requested current, the actual output capacity of the kth charging pile is determined to be the maximum allowable charging current of the kth charging pile.

[0120] The adjustment module 530 is configured to dynamically adjust the requested current of each charging pile according to the actual output capacity of each charging pile.

[0121] In some embodiments, for the kth charging pile among multiple charging piles, when the actual output current of the kth charging pile is greater than or equal to a first threshold, it is determined whether the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, where k is a natural number greater than or equal to 1 and less than N, and N is the number of charging piles; and when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and the actual output capacity of other charging piles among the multiple charging piles is equal to the maximum allowable charging current of the corresponding charging piles, the requested current of the kth charging pile is maintained.

[0122] In other embodiments, when the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and there is a charging pile among the multiple charging piles whose actual output capacity is less than the maximum allowable charging current of the corresponding charging pile, the requested current of the kth charging pile is increased.

[0123] In other embodiments, when the actual output capacity of the kth charging pile is less than the maximum allowable charging current of the kth charging pile, the requested current of the kth charging pile is maintained.

[0124] In some other embodiments, when the actual output current of the kth charging pile is less than the first threshold, the connection with the kth charging pile is disconnected.

[0125] In other embodiments, when there is a charging pile for which parameter configuration has not been completed among the multiple charging piles, the requested current sent to each charging pile is less than the second threshold.

[0126] This embodiment adds a multi-pile charging ready state to the multi-pile charging control process. When the guns are plugged in at the same time, the vehicle needs to wait for each charging pile to complete the parameter configuration and enter the charging ready stage at the same time, and the waiting time is constrained. This solution avoids the problem of voltage mismatch at the pile end and inability to complete the ready judgment, or external current shock when the relay is actuated, which leads to the phenomenon that normal charging cannot be performed or even damages the charging pile or the vehicle's high-voltage charging circuit.

[0127] In some embodiments, the actual output current of the kth charging pile is obtained by a current detection device provided on a charging circuit of a charging port connected to the kth charging pile.

[0128] In this embodiment, an independent current sensor is added to each vehicle fast charging high-voltage circuit to determine the actual output status of the charging pile, so that the charging pile with invalid output can be determined in real time according to the actual charging energy of the charging pile, thereby saving charging port resources and reducing charging time.

[0129] In some other embodiments of the present disclosure, the adjustment module 530 is further configured to dynamically adjust the sum of the requested currents of the multiple charging piles according to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack.

[0130] For example, when the sum of the currents output by multiple charging piles received by the battery pack and the third threshold is less than the current required by the battery pack, the sum of the requested currents of the multiple charging piles is increased based on the fourth threshold at predetermined intervals, and it is determined whether the sum of the currents output by the multiple charging piles received by the battery pack and the fifth threshold is greater than the current required by the battery pack, wherein the fifth threshold is less than the third threshold; and when the sum of the currents output by multiple charging piles received by the battery pack and the fifth threshold is less than or equal to the current required by the battery pack, the sum of the requested currents of the multiple charging piles is increased based on the fourth threshold at predetermined intervals.

[0131] For another example, when the sum of the currents output by multiple charging piles received by the battery pack and the fifth threshold is greater than the current required by the battery pack, determine whether the currents output by the multiple charging piles received by the battery pack are greater than the current required by the battery pack; when the currents output by multiple charging piles received by the battery pack are greater than the current required by the battery pack, reduce the sum of the requested currents of the multiple charging piles based on the sixth threshold at predetermined intervals; and when the currents output by multiple charging piles received by the battery pack are equal to the current required by the battery pack, maintain the sum of the requested currents of the multiple charging piles at the previous moment.

[0132] In the disclosed embodiment, the addition and reduction of guns can be switched arbitrarily during vehicle charging without affecting the normal charging of other piles. The charging piles are dynamically allocated and automatically identified with abnormal outputs based on the number of charging piles being charged in real time and their respective charging capacities, to ensure that the maximum current is always maintained for charging, thereby improving charging efficiency and saving charging time.

[0133] Figure 6 Schematic diagram of the structure of some other embodiments of the multi-pile charging control device of the present disclosure. The multi-pile charging control device includes a memory 610 and a processor 620. Among them: the memory 610 can be a disk, a flash memory or any other non-volatile storage medium. The memory is used to store the instructions in the above embodiments. The processor 620 is coupled to the memory 610 and can be implemented as one or more integrated circuits, such as a microprocessor or a microcontroller. The processor 620 is used to execute the instructions stored in the memory.

[0134] In some embodiments, the processor 620 is coupled to the memory 610 via a BUS 630. The multi-pile charging control device can also be connected to an external storage device 650 via a storage interface 640 to call external data, and can also be connected to a network or another computer system (not shown) via a network interface 660. No further detailed description will be given here.

[0135] In this embodiment, the charging efficiency of the vehicle battery pack can be improved by storing data instructions in a memory and processing the instructions through a processor.

[0136] In some embodiments of the present disclosure, a vehicle is protected, the vehicle is a new energy vehicle, such as a new energy commercial vehicle, and currently, the solution is applicable to all vehicles that need to be charged by a battery pack. The vehicle includes the multi-pile charging control device in the above embodiment.

[0137] The vehicle is equipped with multiple charging ports, each of which is equipped with an independent CAN communication port, charging circuit, CC2, and A+ detection circuit. The independent charging circuit of each charging port is connected in parallel to the busbar of the battery pack, and each charging circuit has an independent switch circuit to control the disconnection and connection of the charging circuit with the battery pack. A current detection device is set on each charging circuit, so that the actual charging current size of each charging circuit can be identified, that is, the actual output current of the charging pile.

[0138] In addition, a charging indicator light can be provided on each charging circuit, and different colors can be used to indicate different charging states of the battery pack, including normal charging state, abnormal exit charging state, charging completion state, and charging pile power too low state. When the charging pile cannot output or has a low output capacity, the indicator light can be used to remind the user to switch to a new pile to reduce charging time and improve charging efficiency.

[0139] In other embodiments, a computer-readable storage medium stores computer program instructions, which, when executed by a processor, implement the steps of the method in the above-mentioned embodiment. It should be understood by those skilled in the art that the embodiments of the present disclosure may be provided as methods, systems, or computer program products. Therefore, the present disclosure may take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present disclosure may take the form of a computer program product implemented on one or more computer-usable non-transient storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0140] In some embodiments, a computer program product is protected, including a computer program or an instruction, which implements the above method when the computer program or instruction is executed by a processor. The computer program product includes a computer program carried on a computer-readable medium, and the computer program contains program code for executing the method shown in the flowchart. In such an embodiment, the computer program can be downloaded and installed from a network through a communication system, or installed from a storage device, or installed from a ROM. When the computer program is executed by the CPU, the above functions defined in the method of the embodiment of the present disclosure are executed.

[0141] The present disclosure is described with reference to flowcharts and / or block diagrams of methods, devices (systems) and computer program products according to embodiments of the present disclosure. It should be understood that each process and / or block in the flowchart and / or block diagram and the combination of processes and / or blocks in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A system that specifies the functions of a box or multiple boxes.

[0142] These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer-readable memory produce a product including an instruction system, which is implemented in the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0143] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0144] So far, the present disclosure has been described in detail. In order to avoid obscuring the concept of the present disclosure, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed here.

[0145] The method and apparatus of the present disclosure may be implemented in many ways. For example, the method and apparatus of the present disclosure may be implemented by software, hardware, firmware, or any combination of software, hardware, and firmware. The above order of steps for the method is for illustration only, and the steps of the method of the present disclosure are not limited to the order specifically described above, unless otherwise specifically stated. In addition, in some embodiments, the present disclosure may also be implemented as a program recorded in a recording medium, which includes machine-readable instructions for implementing the method according to the present disclosure. Therefore, the present disclosure also covers a recording medium storing a program for executing the method according to the present disclosure.

[0146] Although some specific embodiments of the present disclosure have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A multi-pile charging control method, comprising: When parameter configuration of multiple charging piles is completed, sending a request current to each of the multiple charging piles according to the battery pack demand current of the vehicle and the number of charging piles; Obtaining the actual output capacity of each charging pile; as well as The requested current of each charging pile is dynamically adjusted according to the actual output capacity of each charging pile.

2. The multi-pile charging control method according to claim 1, wherein: Obtaining the actual output capacity of each charging pile includes: For a kth charging pile among the multiple charging piles, after the stable output current of the kth charging pile, determine whether the actual output current of the kth charging pile is less than the requested current, where k is greater than or equal to 1 and less than N, and N is the number of charging piles; If the actual output current of the kth charging pile is less than the requested current, determining the actual output capacity of the kth charging pile to be the actual output current; and If the actual output current of the kth charging pile is equal to the requested current, the actual output capacity of the kth charging pile is determined to be the maximum allowable charging current of the kth charging pile.

3. The multi-pile charging control method according to claim 1, wherein: Dynamically adjusting the requested current of each charging pile includes: For a kth charging pile among the multiple charging piles, when the actual output current of the kth charging pile is greater than or equal to a first threshold, determine whether the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, where k is a natural number greater than or equal to 1 and less than N, and N is the number of charging piles; and When the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and the actual output capacity of other charging piles among the multiple charging piles is equal to the maximum allowable charging current of the corresponding charging piles, the requested current of the kth charging pile is maintained.

4. The multi-pile charging control method according to claim 3, wherein: Dynamically adjusting the requested current of each charging pile further includes: When the actual output capacity of the kth charging pile is equal to the maximum allowable charging current of the kth charging pile, and there is a charging pile among the multiple charging piles whose actual output capacity is less than the maximum allowable charging current of the corresponding charging pile, increase the requested current of the kth charging pile.

5. The multi-pile charging control method according to claim 3 or 4, wherein: Dynamically adjusting the requested current of each charging pile further includes: When the actual output capacity of the kth charging pile is less than the maximum allowable charging current of the kth charging pile, the requested current of the kth charging pile is maintained.

6. The multi-pile charging control method according to claim 3, wherein: Dynamically adjusting the requested current of each charging pile further includes: When the actual output current of the kth charging pile is less than the first threshold, disconnecting from the kth charging pile.

7. The multi-pile charging control method according to claim 1, further comprising: When there is a charging pile for which parameter configuration has not been completed among the plurality of charging piles, the requested current sent to each of the charging piles is less than a second threshold.

8. The multi-pile charging control method according to claim 1, wherein: According to the battery pack required current and the number of charging piles, sending a requested current to each of the plurality of charging piles includes: Determining the average output current of each charging pile according to the battery pack demand current and the number of charging piles; and According to the average output current, a request current is sent to each charging pile.

9. The multi-pile charging control method according to any one of claims 1 to 4 and 6 to 8, further comprising: According to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack, the sum of the requested currents of the multiple charging piles is dynamically adjusted.

10. The multi-pile charging control method according to claim 9, wherein: According to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack, dynamically adjusting the sum of the requested currents of the multiple charging piles includes: In the case where the sum of the currents output by the multiple charging piles received by the battery pack and the third threshold value is less than the current required by the battery pack, increasing the sum of the requested currents of the multiple charging piles based on the fourth threshold value at predetermined intervals, and determining whether the sum of the currents output by the multiple charging piles received by the battery pack and the fifth threshold value is greater than the current required by the battery pack, wherein the fifth threshold value is less than the third threshold value; and When the sum of the currents output by the multiple charging piles received by the battery pack and the fifth threshold is less than or equal to the battery pack required current, the sum of the requested currents of the multiple charging piles is increased based on the fourth threshold at predetermined intervals.

11. The multi-pile charging control method according to claim 10, wherein: According to the relationship between the currents output by the multiple charging piles received by the battery pack and the current required by the battery pack, dynamically adjusting the sum of the requested currents of the multiple charging piles further includes: In the case where the sum of the currents output by the multiple charging piles received by the battery pack and the fifth threshold is greater than the required current of the battery pack, determining whether the currents output by the multiple charging piles received by the battery pack are greater than the required current of the battery pack; When the current output by the multiple charging piles received by the battery pack is greater than the current required by the battery pack, reducing the sum of the requested currents of the multiple charging piles based on the sixth threshold at predetermined intervals; and When the current output by the multiple charging piles received by the battery pack is equal to the required current of the battery pack, the sum of the requested currents of the multiple charging piles at the previous moment is maintained.

12. The multi-pile charging control method according to any one of claims 2 to 6, further comprising: The actual output current of the k-th charging pile is obtained by a current detection device arranged on a charging circuit of a charging port connected to the k-th charging pile.

13. A multi-pile charging control device, comprising: A sending module is configured to send a request current to each of the plurality of charging piles according to the battery pack demand current of the vehicle and the number of charging piles when the parameter configuration of the plurality of charging piles is completed; A capability acquisition module is configured to acquire the actual output capability of each charging pile; as well as The adjustment module is configured to dynamically adjust the requested current of each charging pile according to the actual output capacity of each charging pile.

14. A multi-pile charging control device, comprising: Memory; as well as A processor coupled to the memory, the processor being configured to execute the multi-pile charging control method according to any one of claims 1 to 12 based on instructions stored in the memory.

15. A vehicle comprising: The multi-pile charging control device as described in claim 13 or 14.

16. A computer-readable storage medium having computer program instructions stored thereon, wherein when the instructions are executed by a processor, the multi-pile charging control method according to any one of claims 1 to 12 is implemented.

17. A computer program product, comprising a computer program, wherein when the computer program is executed by a processor, the multi-pile charging control method according to any one of claims 1 to 12 is implemented.

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