Vehicle charging control method and device, vehicle and storage medium

Abstract

The invention relates to the technical field of vehicle charging, in particular to a vehicle charging control method and device, a vehicle and a storage medium, and the method comprises the steps that real-time electrical parameters of a battery pack of a target vehicle are monitored; controlling the target vehicle to charge the battery pack in a direct charging mode in response to the condition that the real-time electrical parameter meets the first condition; in response to the real-time electrical parameter meeting a second condition, controlling the target vehicle to charge the battery pack in a boost mode; wherein the first charging power when the battery pack is charged in the direct charging mode is greater than the second charging power when the battery pack is charged in the boosting mode. According to the invention, high-power charging can be met, the low-voltage charging pile can be adapted, and charging compatibility and charging performance can be ensured.

Description

Technical Field

[0001] The present disclosure relates to the technical field of vehicle charging, and in particular, to a vehicle charging control method, device, vehicle, and storage medium. Background Art

[0002] Currently, due to the historical development of charging piles, there are various voltage platform charging piles in the market, and the mainstream ones are 500V, 750V, 1000V, etc. High-voltage charging piles can be compatible with low-voltage electric vehicles, but they cannot fully utilize the capabilities of the charging piles; while low-voltage charging piles cannot charge high-voltage electric vehicles. In related technologies, high-voltage electric vehicles generally carry a boost charging device to achieve compatibility with all voltage platform charging piles.

[0003] However, such a boost device requires semiconductor switching tubes and inductors. Power semiconductors have design specifications, and there are limitations in overcurrent capacity and power. Moreover, power semiconductors generate a large amount of heat and have limited heat dissipation, and the cost is also limited. This results in the power of the boost device not being able to be made very large, unable to meet the high-power charging requirements of current electric vehicles, and it is impossible to have both charging compatibility and charging performance.

[0004] It should be noted that the information disclosed in the above background art section is only used to enhance the understanding of the background of the present disclosure, and thus may include information that does not constitute the prior art known to those of ordinary skill in the art. Summary of the Invention

[0005] To overcome the problems existing in the related technologies, the present disclosure provides a vehicle charging control method, device, vehicle, and storage medium.

[0006] According to the first aspect of the embodiments of the present disclosure, a vehicle charging control method is provided, including:

[0007] Monitoring real-time electrical parameters of a battery pack of a target vehicle;

[0008] In response to the real-time electrical parameters satisfying a first condition, controlling the target vehicle to charge the battery pack in a direct charging mode;

[0009] In response to the real-time electrical parameters satisfying a second condition, controlling the target vehicle to charge the battery pack in a boost mode;

[0010] Wherein, a first charging power when charging the battery pack in the direct charging mode is greater than a second charging power when charging the battery pack in the boost mode.

[0011] In some embodiments of the present disclosure, the real-time electrical parameters include: real-time voltage;

[0012] The first condition includes:

[0013] The real-time voltage is less than or equal to the maximum output voltage of the charging pile;

[0014] The second condition includes:

[0015] The real-time voltage is greater than the maximum output voltage of the charging pile.

[0016] In some embodiments of the present disclosure, the vehicle charging control method further includes: obtaining the maximum output voltage of the charging pile connected to the target vehicle.

[0017] In some embodiments of the present disclosure, the real-time electrical parameter includes: real-time charging current;

[0018] The first condition includes:

[0019] The current value of the real-time charging current is greater than or equal to a first preset current threshold;

[0020] The second condition includes:

[0021] The current value of the real-time charging current is less than the first preset current threshold.

[0022] In some embodiments of the present disclosure, the real-time electrical parameter includes: real-time charging current;

[0023] The first condition includes:

[0024] The time change rate of the real-time charging current is greater than or equal to zero;

[0025] The second condition includes:

[0026] The time change rate of the real-time charging current is less than zero.

[0027] In some embodiments of the present disclosure, the vehicle charging control method is applied to a charging control circuit;

[0028] The charging control circuit at least includes: a direct charging loop;

[0029] The direct charging loop is electrically connected between the battery pack and the charging pile;

[0030] Among them, controlling the target vehicle to charge the battery pack in the direct charging mode includes:

[0031] Controlling the direct charging loop to conduct, so that the battery pack is electrically connected to the charging pile through the direct charging loop for charging.

[0032] In some embodiments of the present disclosure, the charging control circuit further includes: a boost circuit;

[0033] The boost circuit is electrically connected between the battery pack and the charging pile;

[0034] Among them, controlling the target vehicle to charge the battery pack in the boost mode includes:

[0035] Controlling the boost circuit to conduct, so that the battery pack is electrically connected to the charging pile through the boost circuit for charging.

[0036] In some embodiments of the present disclosure, the provided vehicle charging control method further includes:

[0037] In response to the real-time electrical parameters changing from satisfying the first condition to satisfying the second condition, controlling the target vehicle to switch from charging the battery pack in the DC mode to charging the battery pack in the boost mode.

[0038] In some embodiments of the present disclosure, the boost circuit at least includes: a boost converter; the boost converter includes a key capacitor, and the key capacitor is connected in parallel between the output ports of the charging pile;

[0039] Among them, controlling the target vehicle to switch from charging the battery pack in the DC mode to charging the battery pack in the boost mode includes:

[0040] Controlling the direct charging circuit to remain conducting and controlling the boost circuit to turn off;

[0041] Controlling the battery pack to store energy in the key capacitor until the difference between the first voltage across the key capacitor and the real-time output voltage of the charging pile is within a preset range;

[0042] Controlling the boost circuit to conduct;

[0043] Adjusting the duty cycle of the boost circuit so that the current value in the direct charging circuit is lower than a preset second preset current threshold, and controlling the direct charging circuit to turn off.

[0044] In some embodiments of the present disclosure, the boost converter includes: a switch unit, a conversion unit, and an energy storage unit that are electrically connected in sequence;

[0045] The switch unit is used to control the connection state between the conversion unit and the battery pack;

[0046] The conversion unit includes a plurality of conversion bridge arms, and each conversion bridge arm includes an upper switch tube and a lower switch tube;

[0047] The energy storage unit includes the key capacitor, a first switch, a second switch, a third switch, and a first inductor;

[0048] The first end of the first switch is electrically connected to the first output end of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit;

[0049] The first end of the third switch is electrically connected to the second output end of the charging pile, and the second end of the third switch is electrically connected to the second end of the conversion unit;

[0050] The key capacitor is electrically connected between the second end of the first switch and the first end of the third switch;

[0051] Wherein, controlling the battery pack to store energy for the key capacitor includes:

[0052] Controlling the switch unit to conduct, so that the conversion unit is electrically connected to the battery pack;

[0053] Controlling the second switch and the third switch to conduct, so that the battery pack stores energy for the key capacitor.

[0054] In some embodiments of the present disclosure, controlling the boost circuit to conduct includes:

[0055] Controlling the first switch to conduct, so that the boost circuit conducts;

[0056] Wherein, adjusting the duty ratio of the boost circuit so that the current value in the direct charging circuit is lower than a preset second preset current threshold, and controlling the direct charging circuit to turn off includes:

[0057] Adjusting the duty ratio of the lower switch tube in each conversion bridge arm to be greater than the duty ratio of the upper switch tube, so that the current value in the direct charging circuit is lower than a preset second preset current threshold;

[0058] In response to the current value in the direct charging circuit being lower than a preset second preset current threshold, controlling the direct charging circuit to turn off.

[0059] In some embodiments of the present disclosure, the conversion unit further includes: a first capacitor, and the first capacitor is connected in parallel at both ends of the conversion bridge arm;

[0060] The switch unit includes a pre-charge relay and a pre-charge impedance;

[0061] Wherein, controlling the switch unit to conduct includes:

[0062] Closing the pre-charge relay, so that the battery pack pre-charges the first capacitor;

[0063] Controlling the second switch and the third switch to conduct includes:

[0064] In response to completion of the pre - charging of the first capacitor, control the second switch and the third switch to turn on.

[0065] According to a second aspect of the embodiments of the present disclosure, a vehicle charging control device is provided, including:

[0066] A monitoring unit, configured to monitor real - time electrical parameters of a battery pack of a target vehicle;

[0067] A first control unit, configured to control the target vehicle to charge the battery pack in a direct - charging mode in response to the real - time electrical parameters satisfying a first condition;

[0068] A second control unit, configured to control the target vehicle to charge the battery pack in a boost - charging mode in response to the real - time electrical parameters satisfying a second condition;

[0069] Wherein, a first charging power when charging the battery pack in the direct - charging mode is greater than a second charging power when charging the battery pack in the boost - charging mode.

[0070] In some embodiments of the present disclosure, the provided vehicle charging control device further includes: a charging control circuit; the charging control circuit is electrically connected between the battery pack and a charging pile;

[0071] Wherein, the first control unit is configured to: control the charging control circuit to charge the battery pack in the direct - charging mode in response to the real - time electrical parameters satisfying the first condition;

[0072] The second control unit is configured to: control the charging control circuit to charge the battery pack in the boost - charging mode in response to the real - time electrical parameters satisfying the second condition.

[0073] In some embodiments of the present disclosure, the charging control circuit includes:

[0074] A direct - charging loop, electrically connected between the battery pack and the charging pile, and configured to turn on in the direct - charging mode, so that the charging pile charges the battery pack in a direct - charging manner;

[0075] A boost - charging loop, electrically connected between the battery pack and the charging pile, and configured to turn on in the boost - charging mode, so that the charging pile charges the battery pack in a boost - charging manner.

[0076] In some embodiments of the present disclosure, the boost - charging loop includes:

[0077] A switch unit, electrically connected between the battery pack and a conversion unit, and configured to control the connection state between the conversion unit and the battery pack;

[0078] The conversion unit includes a plurality of conversion bridge arms, and each of the conversion bridge arms includes an upper switch and a lower switch;

[0079] The energy storage unit includes a key capacitor, a first switch, a second switch, a third switch, and a first inductor;

[0080] The first end of the first switch is electrically connected to the first output end of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit;

[0081] The first end of the third switch is electrically connected to the second output end of the charging pile, and the second end of the third switch is electrically connected to the second end of the conversion unit.

[0082] In some embodiments of the present disclosure, the switch unit includes: a first switch group and a second switch group;

[0083] The first end of the first switch group is electrically connected to the third end of the conversion unit, and the second end of the first switch group is electrically connected to one end of the battery pack;

[0084] The first end of the second switch group is electrically connected to the fourth end of the conversion unit, and the second end of the second switch group is electrically connected to the other end of the battery pack;

[0085] The first switch group includes: a fourth switch; the second switch group includes: a fifth switch, a pre-charge relay, and a pre-charge impedance;

[0086] The pre-charge relay and the pre-charge impedance are connected in series and then connected in parallel with the fifth switch.

[0087] In some embodiments of the present disclosure, the conversion unit further includes: a first capacitor, and the first capacitor is electrically connected between the third end and the fourth end of the conversion unit.

[0088] In some embodiments of the present disclosure, the direct charging circuit includes: a sixth switch and a seventh switch;

[0089] The sixth switch is electrically connected between one end of the battery pack and the first output end of the charging pile;

[0090] The seventh switch is electrically connected between the other end of the battery pack and the second output end of the charging pile.

[0091] In some embodiments of the present disclosure, the provided vehicle charging control device further includes:

[0092] A third control unit, configured to control the target vehicle to switch from charging the battery pack in a DC mode to charging the battery pack in the boost mode in response to the real-time electrical parameter changing from satisfying the first condition to satisfying the second condition.

[0093] According to a third aspect of the embodiments of the present disclosure, there is provided a vehicle, including: a battery pack and a vehicle charging control device as described in the second aspect above, which is electrically connected to the battery pack.

[0094] According to a fourth aspect of the embodiments of the present disclosure, there is provided a non-transitory computer-readable storage medium, which, when instructions in the storage medium are executed by a processor of a vehicle, enables the vehicle to execute any one of the vehicle charging control methods described in the first aspect above.

[0095] The technical solutions provided by the embodiments of the present disclosure may include the following beneficial effects:

[0096] The present disclosure monitors the real-time electrical parameters of the battery pack of the target vehicle; controls the target vehicle to charge the battery pack in a direct charging mode in response to the real-time electrical parameters satisfying the first condition; controls the target vehicle to charge the battery pack in a boost mode in response to the real-time electrical parameters satisfying the second condition. And the first charging power when charging the battery pack in the direct charging mode is greater than the second charging power when charging the battery pack in the boost mode, thereby realizing charging with different charging powers based on different states of the battery pack of the target vehicle, which can not only meet high-power charging but also be compatible with low-voltage charging piles, ensuring both charging compatibility and charging performance.

[0097] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0098] The accompanying drawings herein are incorporated into the specification and constitute a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0099] Figure 1 is a flowchart of a vehicle charging control method shown according to an exemplary embodiment of the present disclosure Figure 1 .

[0100] Figure 2 is a flowchart of a vehicle charging control method shown according to an exemplary embodiment of the present disclosure Figure 2 .

[0101] Figure 3 is a flowchart of the implementation process of step S206 shown according to an exemplary embodiment of the present disclosure.

[0102] Figure 4It is a schematic diagram of the current flow of a charging control circuit shown according to an exemplary embodiment of the present disclosure Figure 1 .

[0103] Figure 5 It is a schematic diagram of the current flow of a charging control circuit shown according to an exemplary embodiment of the present disclosure Figure 2 .

[0104] Figure 6 It is a schematic diagram of the current flow of a charging control circuit shown according to an exemplary embodiment of the present disclosure Figure 3 .

[0105] Figure 7 It is a schematic diagram of the current flow of a charging control circuit shown according to an exemplary embodiment of the present disclosure Figure 4 .

[0106] Figure 8 It is a schematic diagram of the current flow of a charging control circuit shown according to an exemplary embodiment of the present disclosure Figure 5 .

[0107] Figure 9 It is a block diagram of a vehicle charging control device shown according to an exemplary embodiment of the present disclosure.

[0108] Figure 10 It is a block diagram of a vehicle shown according to an exemplary embodiment of the present disclosure Detailed implementation manners

[0109] Here, some embodiments of the exemplary present disclosure will be described in detail, and the examples are shown in the drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. Various changes, modifications, and equivalents of the methods, apparatuses, and / or systems described herein will become apparent after understanding the present disclosure. For example, the order of the operations described herein is merely an example and is not limited to the orders set forth herein, but may be changed as will be apparent after understanding the present disclosure, except for operations that must be performed in a specific order. Additionally, descriptions of features known in the art may be omitted for increased clarity and conciseness

[0110] The implementation manners described in some embodiments of the following exemplary embodiments of the present disclosure do not represent all implementation manners consistent with the present invention of the present disclosure. Instead, they are merely examples of apparatuses and methods consistent with some aspects of the present invention of the present disclosure as detailed in the appended claims

[0111] The following will describe in detail the specific implementation manners of the embodiments of the present disclosure in conjunction with the drawings

[0112] Figure 1 is a flowchart of a vehicle charging control method shown according to an exemplary embodiment of the present disclosure Figure 1 , as Figure 1 shown, the vehicle charging control method can be used for a vehicle, which can be a new energy vehicle and can charge the battery pack in the vehicle through a charging device, such as a charging pile, and includes the following steps.

[0113] In step S102, monitor the real-time electrical parameters of the battery pack of the target vehicle.

[0114] In the exemplary embodiment of the present disclosure, the real-time electrical parameters can be the real-time voltage or the real-time charging current. The real-time voltage of the battery pack can be monitored in real time through a sampling circuit to determine the real-time voltage of the battery pack. The charging current of the battery pack can be monitored in real time through a sampling circuit, that is, the current flowing into the battery pack is monitored in real time to determine the real-time charging current of the battery pack.

[0115] In step S104, in response to the real-time electrical parameters satisfying the first condition, control the target vehicle to charge the battery pack in the direct charging mode.

[0116] It should be noted that when the real-time electrical parameters satisfy the first condition, that is, there is no need to boost the output voltage of the charging device to charge the battery pack. In the initial stage of charging, the voltage of the battery pack is low. Even if the output voltage of the charging device is lower than the maximum voltage of the battery pack, at this time, the real-time voltage of the battery pack is lower than the output voltage of the charging device, and no boosting process is required. Direct connection can achieve charging, and the battery pack can accept a relatively large charging current. The direct charging mode can be used to charge the battery pack with the charging device, so as to meet the demand for the high-power charging current of the battery pack.

[0117] In step S106, in response to the real-time electrical parameters satisfying the second condition, control the target vehicle to charge the battery pack in the boosting mode.

[0118] In some exemplary embodiments of the present disclosure, when the real-time electrical parameters satisfy the second condition, that is, as the charging progresses, the real-time voltage of the battery pack keeps rising until it may be higher than the output voltage of the charging device. At this time, the direct charging mode can no longer charge the battery pack, and it is necessary to boost the output voltage of the charging device to charge the battery pack. The boosting mode can be used to charge the battery pack. And in the later stage of the charging phase, the charging current that the battery pack can accept will also decrease. At this time, using the boosting mode to charge the battery pack can not only ensure the full charge of the battery pack and ensure the charging compatibility, but also will not cause the charging power to be limited, ensuring the charging performance.

[0119] It should be noted that the first charging power when charging the battery pack in the direct charging mode is greater than the second charging power when charging the battery pack in the boosting mode.

[0120] As can be seen from the above steps, in the vehicle charging control method provided in the embodiments of the present disclosure, the real-time electrical parameters of the battery pack of the target vehicle are monitored; in response to the real-time electrical parameters satisfying the first condition, the target vehicle is controlled to charge the battery pack in a direct charging mode; in response to the real-time electrical parameters satisfying the second condition, the target vehicle is controlled to charge the battery pack in a boost mode. And the first charging power when charging the battery pack in the direct charging mode is greater than the second charging power when charging the battery pack in the boost mode, thereby realizing charging with different charging powers based on different states of the battery pack of the target vehicle, which can not only meet high-power charging but also be compatible with low-voltage charging piles, ensuring both charging compatibility and charging performance.

[0121] In some exemplary embodiments of the present disclosure, the real-time electrical parameters include: real-time voltage. Correspondingly, the first condition includes: the real-time voltage is less than or equal to the highest output voltage of the charging pile; the second condition includes: the real-time voltage is greater than the highest output voltage of the charging pile. That is to say, when the real-time voltage of the battery pack is less than or equal to the highest output voltage of the charging pile, the charging pile is directly connected to the battery pack to supply power to the battery pack in a direct charging mode. At this time, the battery pack charging is a high-current and high-power charging mode. When it is monitored that the real-time voltage of the battery pack is higher than the highest output voltage of the charging pile, the charging mode of the battery pack is switched to the boost mode, and the charging pile is electrically connected to the battery pack through a boost circuit to supply power to the battery pack in the boost mode. At this time, the battery pack charging is a low-current and low-power charging mode.

[0122] Correspondingly, in this exemplary embodiment of the present disclosure, the vehicle charging control method provided Figure 1 On the basis of the vehicle charging control method shown, further includes: obtaining the highest output voltage of the charging pile connected to the target vehicle. It can be determined through the communication connection between the target vehicle and the charging pile, and the highest output voltage of the charging pile supplying power to the target vehicle can be obtained by means such as an in-vehicle system or application, an associated mobile application, or querying a charging pile management system. It can be obtained in advance before charging starts, or can be obtained in real time through communication during charging. The embodiments of the present disclosure do not make limitations here.

[0123] In some other exemplary embodiments of the present disclosure, the real-time electrical parameters include: real-time charging current, and accordingly, the first condition includes: the current value of the real-time charging current is greater than or equal to the first preset current threshold; the second condition includes: the current value of the real-time charging current is less than the first preset current threshold. In other words, the current value of the real-time charging current can be used to distinguish between the two states. In different states, the charging current that the battery pack can allow is different. The charging current that the battery pack can allow in the early stage of the charging stage is much larger than the charging current that the battery pack can allow in the later stage of the charging stage. Therefore, by setting the first preset current threshold, by comparing the current value of the real-time charging current with the size of the first preset current threshold, it can be determined which charging mode to adopt. It can be understood that the first preset current threshold can be determined in advance by multiple tests, and the specific value is not limited here.

[0124] In some other exemplary embodiments of the present disclosure, the real-time electrical parameters include: the real-time electrical parameters include: the real-time charging current. Accordingly, the first condition includes: the time change rate of the real-time charging current is greater than or equal to zero; the second condition includes: the time change rate of the real-time charging current is less than zero. It should be noted that when the battery pack voltage has not yet increased to the maximum output voltage of the charging pile, the charging current has been increasing. Once the output voltage of the charging pile cannot directly charge the battery pack, the charging current will begin to decrease. At this time, it is possible that the battery pack voltage is already higher than the maximum output voltage of the charging pile. Therefore, in order to more accurately distinguish the two states, the time change rate of the real-time charging current can be used to distinguish. In other words, for the real-time charging current, before the real-time charging current waveform has an inflection point, the battery pack can be charged in direct charging mode. After the real-time charging current waveform has an inflection point, the battery pack needs to be charged in boost mode.

[0125] In some embodiments of the present disclosure, a vehicle charging control method is applied to a charging control circuit, which at least includes: a direct charging circuit; the direct charging circuit is electrically connected between a battery pack and a charging pile. Accordingly, controlling the target vehicle to charge the battery pack in a direct charging mode includes: controlling the direct charging circuit to be turned on so that the battery pack is electrically connected to the charging pile through the direct charging circuit for charging.

[0126] In some embodiments of the present disclosure, the charging control circuit further includes: a boost circuit, the boost circuit is electrically connected between the battery pack and the charging pile, and the boost circuit and the direct charging circuit are in a parallel relationship. Accordingly, controlling the target vehicle to charge the battery pack in a boost mode includes: controlling the boost circuit to be turned on so that the battery pack is electrically connected to the charging pile through the boost circuit for charging.

[0127] In some exemplary embodiments of the present disclosure, Figure 2 The process of the vehicle charging control method according to an exemplary embodiment of the present disclosure is shown as followsFigure 2 。 Figure 2 Steps S202 to S204 and step S208 in Figure 1 correspond to steps S102 to S106 in Figure 2 and will not be repeated here. As Figure 1 shown, based on the vehicle charging control method shown in

[0128] In step S206, in response to the real-time electrical parameters changing from satisfying the first condition to satisfying the second condition, control the target vehicle to switch from charging the battery pack in DC mode to charging the battery pack in boost mode.

[0129] In some embodiments of the present disclosure, the boost circuit at least includes: a boost converter, the boost converter includes a key capacitor, which can also be called a DC link capacitor, and the key capacitor is connected in parallel between the output ports of the charging pile. The specific implementation process of step 206 is as Figure 3 shown and includes the following steps.

[0130] In step S302, control the direct charging circuit to remain conducting and control the boost circuit to turn off.

[0131] In step S304, control the battery pack to store energy for the key capacitor until the difference between the first voltage across the key capacitor and the real-time output voltage of the charging pile is within a preset range.

[0132] In step S306, control the boost circuit to turn on.

[0133] In step S308, adjust the duty cycle of the boost circuit so that the current value in the direct charging circuit is lower than a preset second preset current threshold, and control the direct charging circuit to turn off.

[0134] It should be noted that since the direct charging circuit and the boost circuit are connected in parallel between the charging pile and the battery pack, if you want to switch from the direct charging mode to the boost mode, if you directly disconnect the direct charging circuit and turn on the boost circuit, not only will the boost circuit be out of control, but also the output of the charging pile will be open circuit during the switching period, affecting the operation of the charging pile. Therefore, the present disclosure provides an embodiment Figure 3 shown direct connection to boost switching control method to ensure that the switching process is controlled and ensure safe and reliable charging.

[0135] In some embodiments of the present disclosure, during the switching process, the direct charging circuit is first maintained, and the boost circuit remains in an open state. At this time, since the battery pack voltage is equal to or higher than the output voltage of the charging pile, the key capacitor in the boost circuit is controlled to be electrically connected to the battery pack, so as to store energy for the key capacitor until the first voltage across the key capacitor is close to the real-time output voltage of the charging pile. At this time, the boost circuit is controlled to conduct, and both the direct charging circuit and the boost circuit are in a conducting state. However, since the impedance of the direct charging circuit is small, the current still flows through the direct charging circuit. At this time, the duty ratio of the boost circuit can be adjusted to make the current value in the direct charging circuit lower than a preset second preset current threshold, that is, to control the current in the direct charging circuit to gradually decrease to a very small value. At this time, the direct charging circuit can be turned off to ensure that the direct charging circuit is turned off when the current in the direct charging circuit is small, ensuring the safety of turning off.

[0136] In some exemplary embodiments of the present disclosure, the boost converter includes: a switch unit, a conversion unit, and an energy storage unit that are sequentially electrically connected; the switch unit is used to control the connection state between the conversion unit and the battery pack; the conversion unit includes a plurality of conversion bridge arms, and each conversion bridge arm includes an upper switch tube and a lower switch tube; the energy storage unit includes a key capacitor, a first switch, a second switch, a third switch, and a first inductor; the first end of the first switch is electrically connected to the first output terminal of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit; the first end of the third switch is electrically connected to the second output terminal of the charging pile, the second end of the third switch is electrically connected to the second end of the conversion unit; the key capacitor is electrically connected between the second end of the first switch and the first end of the third switch.

[0137] Correspondingly, controlling the battery pack to store energy for the key capacitor includes: controlling the switch unit to conduct so that the conversion unit is electrically connected to the battery pack; controlling the second switch and the third switch to conduct so that the battery pack stores energy for the key capacitor. Controlling the boost circuit to conduct includes: controlling the first switch to conduct so that the boost circuit conducts. Adjusting the duty ratio of the boost circuit to make the current value in the direct charging circuit lower than a preset second preset current threshold and controlling the direct charging circuit to turn off includes: adjusting the duty ratio of the lower switch tube in each conversion bridge arm to be greater than the duty ratio of the upper switch tube so that the current value in the direct charging circuit is lower than a preset second preset current threshold; in response to the current value in the direct charging circuit being lower than a preset second preset current threshold, controlling the direct charging circuit to turn off.

[0138] In some exemplary embodiments of the present disclosure, the conversion unit further includes: a first capacitor, which is connected in parallel across both ends of the conversion bridge arm. The switching unit includes a pre-charge relay and a pre-charge impedance. Correspondingly, controlling the switching unit to conduct includes: closing the pre-charge relay to pre-charge the first capacitor with the battery pack; controlling the second switch and the third switch to conduct includes: in response to the completion of the pre-charging of the first capacitor, controlling the second switch and the third switch to conduct. Thus, it is possible to prevent the occurrence of a very high transient current that may be caused by directly applying a high voltage without pre-charging, and the over-current sticking of the relay, that is, to prevent the relay contacts from melting or sticking together due to overheating.

[0139] To better explain the process of controlling the target vehicle to switch from charging the battery pack in the DC mode to charging the battery pack in the boost mode, it is described in conjunction with Figures 4 to 8 the charging control circuit shown below. Figures 4 to 8 The charging control circuit shown below includes: a direct charging loop and a boost loop.

[0140] Specifically, the boost loop includes: a switching unit 10, a conversion unit 20, and an energy storage unit 30. The energy storage unit includes: a key capacitor C O , a first switch S31, a second switch S32, a third switch S33, and a first inductor L31. S31, L31, and S32 are connected in series to the first output terminal of the charging pile, S33 is connected to the second output terminal of the charging pile, and C O is connected between the first end of L31 and the first end of S33. It can be understood that the first switch S31, the second switch S32, and the third switch S33 can also be relays.

[0141] The conversion unit 20 includes: a first capacitor Cx, switching transistors Q21, Q22, Q23, Q24, Q25, Q26, diodes D21, D22, D23, D24, D25, D26, inductors L21, L22, L23. The switching transistors Q21 (upper switching transistor) and Q22 (lower switching transistor) form the first conversion bridge arm, the switching transistors Q23 (upper switching transistor) and Q24 (lower switching transistor) form the second conversion bridge arm, and the switching transistors Q25 (upper switching transistor) and Q26 (lower switching transistor) form the third conversion bridge arm. The midpoint of the first conversion bridge arm is connected to the inductor L21 and then electrically connected to the second end of S32. The midpoint of the second conversion bridge arm is connected to the inductor L22 and then electrically connected to the second end of S32. The midpoint of the third conversion bridge arm is connected to the inductor L23 and then electrically connected to the second end of S32. And a diode, that is, a freewheeling diode, is connected between the drain and source of each switching transistor to realize functions such as freewheeling, reverse voltage protection, and improvement of switching characteristics. The first capacitor Cx is connected in parallel with each conversion bridge arm. The switching unit 10 includes: a first switching group and a second switching group. The first switching group includes a fourth switch, and the fourth switch can be a relay K11. The second switching group includes: a fifth switch, a pre-charge relay K13, and a pre-charge impedance R11. The fifth switch can be a relay K12. The pre-charge relay K13 and the pre-charge impedance R11 are connected in series and then connected in parallel across both ends of the relay K12.

[0142] Specifically, the direct charging circuit includes: a sixth switch and a seventh switch. The sixth switch is electrically connected between one end of the battery pack and the first output terminal of the charging pile; the seventh switch is electrically connected between the other end of the battery pack and the second output terminal of the charging pile. The sixth switch can be a relay K01, and the seventh switch can be a relay K02.

[0143] During specific implementation, when the battery pack is charged in the direct charging mode, the current flow is as Figure 4 shown. The relays K01 and K02 are closed, and the output current of the charging pile directly enters the battery pack to achieve high-power direct charging.

[0144] When switching from charging the battery pack in the DC mode to charging the battery pack in the boost mode, first request the charging pile to output a relatively small output current, for example, it can be 5A, to avoid damaging loop components such as relays and switching transistors due to impact and ensure the safety of the switching. The value of this relatively small output current can be set according to empirical values, or can be determined based on the upper limit of the current cut-off with load of the relay, or can be determined based on the switching current limit of the switching transistor.

[0145] First, keep the relays K01 and K02 in the closed state. Close K11, K12, and K13 to pre-charge the first capacitor Cx, as Figure 5As shown, after the pre-charging is completed, disconnect K13, and control the second switch S32 and the third switch S33 to conduct. Control at least one of the three upper switching tubes in the three conversion bridge arms to remain conducting to achieve the pre-charging of the key capacitor C O The current flow is as shown in Figure 6 to prevent the non-pre-charged overcurrent from sticking the relay. It should be noted that by controlling the duty cycle or switching frequency of the turned-on upper switching tube, the current value flowing through the switching tube is limited to avoid safety problems caused by excessive current values.

[0146] When the difference between the first voltage across the key capacitor C O and the real-time output voltage of the charging pile is within the preset range, close S31, that is, make the boost circuit conduct. Since both the direct charging circuit and the boost circuit are in the conducting state at this time, but the impedance of the direct charging circuit is small, the current still flows through the direct charging circuit and no current flows through the boost circuit. Control the three lower switching tubes in the three conversion bridge arms to conduct through carrier current limiting, forcing the current to flow through the three lower switching tubes. Refer to Figure 7 to pull down the voltage across the ports where the charging control circuit is connected to the charging pile. At this time, the current in the direct charging circuit has been reduced to the safe range, and disconnect the relays K01 and K02. It should be noted that by controlling the three lower switching tubes in the three conversion bridge arms to conduct through carrier current limiting, the duty cycle of the lower switching tube in each conversion bridge arm can be adjusted to be greater than the duty cycle of the corresponding upper switching tube, so that the current is transferred from flowing through the upper switching tube to the lower switching tube within the controlled range (without damaging the lower switching tube circuit). Even the duty cycle of the lower switching tube can be set to 100%, forcing the current to flow through the lower switching tube back to the charging pile, but it is necessary to ensure that the current in the boost circuit does not damage the device. During this process, the freewheeling diodes of the three upper switching tubes are always in the conducting state.

[0147] When charging the battery pack in the boost mode, adjust the duty cycles of the upper switching tube and the lower switching tube in each conversion bridge arm so that the conversion unit 20 is in a boost state, boost the output voltage of the charging pile and transmit it to the battery pack for charging. The current flow is as shown in Figure 8 shown.

[0148] It can be seen that in the embodiments of the present disclosure, the direct charging mode is realized by directly connecting two high-voltage wire harnesses, which is not limited by the over-current capacity of electronic components, and can maximize the charging capacity of the charging pile to achieve a large current charging when the state of charge (SOC) of the battery pack is low. As the SOC increases, the allowable charging current of the battery pack gradually decreases, and the voltage of the battery pack gradually increases. When the current of the charging pile cannot flow into the battery pack, a control method for switching from the direct charging mode to the boost charging mode is adopted to controllably and safely switch to boost charging to achieve a full charge of the battery to 100%, without the situation of charging stop and incomplete charge caused by the voltage of the charging pile not covering. In addition, due to the battery characteristics, the allowable charging current of the battery pack is also small when the SOC is high, and at this time, it is less restricted or not affected by the boost charging mode. Both charging compatibility and charging performance are ensured.

[0149] Figure 9 FIG. is a block diagram of a vehicle charging control device according to some exemplary embodiments of the present disclosure. Referring to Figure 9 , the device 900 includes: a monitoring unit 901, a first control unit 902, and a second control unit 903.

[0150] The monitoring unit 901 is configured to monitor real-time electrical parameters of a battery pack of a target vehicle;

[0151] The first control unit 902 is configured to control the target vehicle to charge the battery pack in a direct charging mode in response to the real-time electrical parameters satisfying a first condition;

[0152] The second control unit 903 is configured to control the target vehicle to charge the battery pack in a boost charging mode in response to the real-time electrical parameters satisfying a second condition;

[0153] Wherein, a first charging power when charging the battery pack in the direct charging mode is greater than a second charging power when charging the battery pack in the boost charging mode.

[0154] In some embodiments of the present disclosure, the provided vehicle charging control device further includes: a charging control circuit, which is electrically connected between the battery pack and the charging pile, and the specific structure can be referred to Figures 4 to 8 .

[0155] Correspondingly, the first control unit 902 is configured to: control the charging control circuit to charge the battery pack in the direct charging mode in response to the real-time electrical parameters satisfying the first condition; the second control unit 903 is configured to: control the charging control circuit to charge the battery pack in the boost charging mode in response to the real-time electrical parameters satisfying the second condition.

[0156] In some embodiments of the present disclosure, the charging control circuit includes:

[0157] A direct charging circuit is electrically connected between the battery pack and the charging pile and is used to conduct in the direct charging mode so that the charging pile charges the battery pack in a direct charging manner;

[0158] A boost circuit is electrically connected between the battery pack and the charging pile and is used to conduct in the boost mode so that the charging pile charges the battery pack in a boost manner.

[0159] In some embodiments of the present disclosure, the boost circuit includes:

[0160] A switching unit is electrically connected between the battery pack and the conversion unit and is used to control the connection state between the conversion unit and the battery pack;

[0161] The conversion unit includes a plurality of conversion bridge arms, and each conversion bridge arm includes an upper switching tube and a lower switching tube;

[0162] An energy storage unit includes a key capacitor, a first switch, a second switch, a third switch, and a first inductor;

[0163] The first end of the first switch is electrically connected to the first output end of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit;

[0164] The first end of the third switch is electrically connected to the second output end of the charging pile, and the second end of the third switch is electrically connected to the second end of the conversion unit;

[0165] The key capacitor is electrically connected between the first end of the first inductor and the first end of the third switch.

[0166] In some embodiments of the present disclosure, the switching unit includes: a first switch group and a second switch group;

[0167] The first end of the first switch group is electrically connected to the third end of the conversion unit, and the second end of the first switch group is electrically connected to one end of the battery pack;

[0168] The first end of the second switch group is electrically connected to the fourth end of the conversion unit, and the second end of the second switch group is electrically connected to the other end of the battery pack;

[0169] The first switch group includes: a fourth switch; the second switch group includes: a fifth switch, a pre-charge relay, and a pre-charge impedance; the pre-charge relay and the pre-charge impedance are connected in series and are in parallel with the fifth switch.

[0170] In some embodiments of the present disclosure, the conversion further includes: a first capacitor, and the first capacitor is electrically connected between the third end and the fourth end of the conversion unit.

[0171] In some embodiments of the present disclosure, the direct charging circuit includes: a sixth switch and a seventh switch; the sixth switch is electrically connected between one end of the battery pack and the first output terminal of the charging pile; the seventh switch is electrically connected between the other end of the battery pack and the second output terminal of the charging pile.

[0172] In some embodiments of the present disclosure, the provided vehicle charging control device further includes: a third control unit configured to control the target vehicle to switch from charging the battery pack in a DC mode to charging the battery pack in a boost mode in response to the real-time electrical parameters changing from satisfying a first condition to satisfying a second condition.

[0173] It can be understood that the first control unit, the second control unit, and the third control unit may be integrated in the same controller, and the controller is used to implement their respective functions.

[0174] Regarding the device in the above embodiments, the specific manners of the operations performed by each unit and the charging control circuit have been described in detail in the embodiments related to the method, and will not be elaborated herein.

[0175] Figure 10 FIG. 13 is a block diagram of a vehicle 1000 shown according to an exemplary embodiment. For example, the vehicle 1000 may be a hybrid vehicle, or a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 1000 may be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0176] Referring to Figure 10 , the vehicle 1000 may include various subsystems. For example, the infotainment system 1010, the perception system 1020, the decision control system 1030, the drive system 1040, and the computing platform 1050. Among them, the vehicle 1000 may further include more or fewer subsystems, and each subsystem may include multiple components. In addition, each subsystem and each component of the vehicle 1000 may be interconnected by wired or wireless means.

[0177] In some embodiments, the infotainment system 1010 may include a communication system, an entertainment system, a navigation system, etc.

[0178] The perception system 1020 may include several sensors for sensing information about the environment around the vehicle 1000. For example, the perception system 1020 may include a global positioning system (the global positioning system may be a GPS system, or a Beidou system, or other positioning systems), an inertial measurement unit (IMU), a lidar, a millimeter wave radar, an ultrasonic radar, and a camera device.

[0179] The decision control system 1030 may include a computing system, a vehicle controller, a steering system, an accelerator, and a braking system.

[0180] The drive system 1040 may include components that provide powered movement for the vehicle 1000. In one embodiment, the drive system 1040 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of an internal combustion engine, an electric motor, and an air compression engine. The engine is capable of converting the energy provided by the energy source into mechanical energy.

[0181] Some or all functions of the vehicle 1000 are controlled by the computing platform 1050. The computing platform 1050 may include at least one processor 1051 and a memory 1052, and the processor 1051 may execute instructions 1053 stored in the memory 1052.

[0182] The processor 1051 may be any conventional processor, such as a commercially available CPU. The processor may also include, such as a data processor (Graphic Process Unit, GPU), a field programmable gate array (Field Programmable Gate Array, FPGA), a system on chip (System on Chip, SOC), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), or a combination thereof.

[0183] The memory 1052 may be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read only memory (EEPROM), erasable programmable read only memory (EPROM), programmable read only memory (PROM), read only memory (ROM), magnetic memory, flash memory, a magnetic disk, or an optical disc.

[0184] In addition to the instructions 1053, the memory 1052 may also store data, such as road maps, route information, data such as the position, direction, and speed of the vehicle. The data stored in the memory 1052 can be used by the computing platform 1050.

[0185] In an embodiment of the present disclosure, the processor 1051 may execute the instructions 1053 to complete all or part of the steps of the above vehicle charging control method. The vehicle 1000 includes a battery pack and the vehicle charging control device provided in the above embodiment that is electrically connected to the battery pack.

[0186] In some embodiments of the present disclosure, a non-transitory computer-readable storage medium, when the instructions in the storage medium are executed by a processor of a vehicle, enables the vehicle to execute the above vehicle charging control method.

[0187] Other embodiments of the present disclosure will be readily apparent to those skilled in the art upon consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow the general principles of the present disclosure and include known or customary technical means in the art not disclosed herein. The specification and examples are only to be considered as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0188] It should be understood that the present disclosure is not limited to the exact structures described above and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A vehicle charging control method, characterized in that, Including: Monitoring real-time electrical parameters of the battery pack of the target vehicle; In response to the real-time electrical parameters satisfying a first condition, controlling the target vehicle to charge the battery pack in a direct charging mode; In response to the real-time electrical parameters satisfying a second condition, controlling the target vehicle to charge the battery pack in a boost charging mode; Wherein, a first charging power when charging the battery pack in the direct charging mode is greater than a second charging power when charging the battery pack in the boost charging mode.

2. The vehicle charging control method according to claim 1, wherein, The real-time electrical parameters include: real-time voltage; The first condition includes: The real-time voltage is less than or equal to the maximum output voltage of the charging pile; The second condition includes: The real-time voltage is greater than the maximum output voltage of the charging pile.

3. The vehicle charging control method according to claim 2, wherein, Further including: Obtaining the maximum output voltage of the charging pile connected to the target vehicle.

4. The vehicle charging control method according to claim 1, characterized in that, The real-time electrical parameters include: real-time charging current; The first condition includes: A current value of the real-time charging current is greater than or equal to a first preset current threshold; The second condition includes: The current value of the real-time charging current is less than the first preset current threshold.

5. The vehicle charging control method according to claim 1, characterized in that The real-time electrical parameters include: real-time charging current; The first condition includes: A time change rate of the real-time charging current is greater than or equal to zero; The second condition includes: The time change rate of the real-time charging current is less than zero.

6. The vehicle charging control method according to claim 1, wherein, The vehicle charging control method is applied to a charging control circuit; The charging control circuit at least includes: a direct charging circuit; The direct charging circuit is electrically connected between the battery pack and the charging pile; Wherein, controlling the target vehicle to charge the battery pack in the direct charging mode includes: Controlling the direct charging circuit to conduct, so that the battery pack is electrically connected to the charging pile through the direct charging circuit for charging.

7. The vehicle charging control method according to claim 6, characterized in that, The charging control circuit further includes: a boost circuit; The boost circuit is electrically connected between the battery pack and the charging pile; Wherein, controlling the target vehicle to charge the battery pack in the boost charging mode includes: Controlling the boost circuit to conduct, so that the battery pack is electrically connected to the charging pile through the boost circuit for charging.

8. The vehicle charging control method according to claim 7, wherein Further including: In response to the real-time electrical parameters changing from satisfying the first condition to satisfying the second condition, controlling the target vehicle to switch from charging the battery pack in the direct current mode to charging the battery pack in the boost mode.

9. The vehicle charging control method according to claim 8, wherein The boost circuit at least includes: a boost converter; the boost converter includes a key capacitor, and the key capacitor is connected in parallel between the output ports of the charging pile; Wherein, controlling the target vehicle to switch from charging the battery pack in the direct current mode to charging the battery pack in the boost mode includes: Controlling the direct charging circuit to remain conducting and controlling the boost circuit to turn off; Controlling the battery pack to store energy for the key capacitor until a difference between a first voltage across the key capacitor and the real-time output voltage of the charging pile is within a preset range; Controlling the boost circuit to conduct; Adjusting a duty ratio of the boost circuit so that a current value in the direct charging circuit is lower than a second preset current threshold, and controlling the direct charging circuit to turn off.

10. The vehicle charging control method according to claim 9, wherein The boost converter includes: a switch unit, a conversion unit, and an energy storage unit that are sequentially electrically connected; The switch unit is used to control the connection state between the conversion unit and the battery pack; The conversion unit includes a plurality of conversion bridge arms, and each conversion bridge arm includes an upper switch tube and a lower switch tube; The energy storage unit includes the key capacitor, a first switch, a second switch, a third switch, and a first inductor; The first end of the first switch is electrically connected to the first output end of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit; The first end of the third switch is electrically connected to the second output end of the charging pile, and the second end of the third switch is electrically connected to the second end of the conversion unit; The key capacitor is electrically connected between the second end of the first switch and the first end of the third switch; Among them, controlling the battery pack to store energy for the key capacitor includes: Controlling the switch unit to conduct, so that the conversion unit is electrically connected to the battery pack; Controlling the second switch and the third switch to conduct, so that the battery pack stores energy for the key capacitor.

11. The vehicle charging control method according to claim 10, wherein Controlling the boost circuit to conduct includes: Controlling the first switch to conduct, so that the boost circuit conducts; Among them, adjusting the duty cycle of the boost circuit so that the current value in the direct charging circuit is lower than a preset second preset current threshold, and controlling the direct charging circuit to turn off includes: Adjusting the duty cycle of the lower switch tube in each conversion bridge arm to be greater than the duty cycle of the upper switch tube, so that the current value in the direct charging circuit is lower than a preset second preset current threshold; In response to the current value in the direct charging circuit being lower than a preset second preset current threshold, controlling the direct charging circuit to turn off.

12. The vehicle charging control method according to claim 10, characterized in that, The conversion unit further includes: a first capacitor, and the first capacitor is connected in parallel at both ends of the conversion bridge arm; The switch unit includes a pre-charge relay and a pre-charge impedance; Among them, controlling the switch unit to conduct includes: Closing the pre-charge relay so that the battery pack pre-charges the first capacitor; Controlling the second switch and the third switch to conduct includes: In response to the first capacitor pre-charge being completed, controlling the second switch and the third switch to conduct.

13. A vehicle charging control device, characterized in that, Includes: A monitoring unit for monitoring the real-time electrical parameters of the battery pack of the target vehicle; A first control unit for controlling the target vehicle to charge the battery pack in a direct charging mode in response to the real-time electrical parameters satisfying a first condition; A second control unit for controlling the target vehicle to charge the battery pack in a boost mode in response to the real-time electrical parameters satisfying a second condition; Among them, the first charging power when charging the battery pack in the direct charging mode is greater than the second charging power when charging the battery pack in the boost mode.

14. The vehicle charging control device according to claim 13, characterized in that It further includes: A charging control circuit; the charging control circuit is electrically connected between the battery pack and the charging pile; Wherein, the first control unit is configured to: in response to the real-time electrical parameters satisfying a first condition, control the charging control circuit to charge the battery pack in a direct charging mode; The second control unit is configured to: in response to the real-time electrical parameters satisfying a second condition, control the charging control circuit to charge the battery pack in a boost mode.

15. The vehicle charging control device according to claim 14, wherein The charging control circuit includes: A direct charging loop, electrically connected between the battery pack and the charging pile, for conducting in the direct charging mode so that the charging pile charges the battery pack in a direct charging manner; A boost loop, electrically connected between the battery pack and the charging pile, for conducting in the boost mode so that the charging pile charges the battery pack in a boost manner.

16. The vehicle charging control device according to claim 15, wherein The boost loop includes: A switch unit, electrically connected between the battery pack and the conversion unit, for controlling the connection state between the conversion unit and the battery pack; The conversion unit includes a plurality of conversion bridge arms, and each conversion bridge arm includes an upper switch tube and a lower switch tube; An energy storage unit includes a key capacitor, a first switch, a second switch, a third switch, and a first inductor; The first end of the first switch is electrically connected to the first output end of the charging pile, the second end of the first switch is electrically connected to the first end of the first inductor, the second end of the first inductor is electrically connected to the first end of the second switch, and the second end of the second switch is electrically connected to the first end of the conversion unit; The first end of the third switch is electrically connected to the second output end of the charging pile, and the second end of the third switch is electrically connected to the second end of the conversion unit; The key capacitor is electrically connected between the first end of the first inductor and the first end of the third switch.

17. The vehicle charging control device according to claim 16, characterized in that, The switch unit includes: a first switch group and a second switch group; The first end of the first switch group is electrically connected to the third end of the conversion unit, and the second end of the first switch group is electrically connected to one end of the battery pack; The first end of the second switch group is electrically connected to the fourth end of the conversion unit, and the second end of the second switch group is electrically connected to the other end of the battery pack; The first switch group includes: a fourth switch; the second switch group includes: a fifth switch, a pre-charge relay, and a pre-charge impedance; The pre-charge relay and the pre-charge impedance are connected in series and then connected in parallel with the fifth switch.

18. The vehicle charging control device according to claim 17, wherein, The conversion further includes: a first capacitor, and the first capacitor is electrically connected between the third end and the fourth end of the conversion unit.

19. The vehicle charging control device according to claim 15, wherein The direct charging loop includes: a sixth switch and a seventh switch; The sixth switch is electrically connected between one end of the battery pack and the first output end of the charging pile; The seventh switch is electrically connected between the other end of the battery pack and the second output end of the charging pile.

20. The vehicle charging control device according to claim 13, characterized in that, It further includes: A third control unit, for in response to the real-time electrical parameters changing from satisfying the first condition to satisfying the second condition, controlling the target vehicle to switch from charging the battery pack in a direct current mode to charging the battery pack in the boost mode.

21. A vehicle, characterized in that, Includes: A battery pack and a vehicle charging control device as claimed in any one of claims 13 to 20 and electrically connected to the battery pack.

22. A non-transitory computer-readable storage medium, which when the instructions in the storage medium are executed by a processor of a vehicle, enables the vehicle to execute a vehicle charging control method as claimed in any one of claims 1 to 12.

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