Vehicle and charging control method and device thereof, electronic equipment and storage medium

Abstract

The invention provides a vehicle and a charging control method and device thereof, electronic equipment and a storage medium, and the method comprises the steps: receiving a maximum output voltage fed back by a charging pile in a process that the charging pile responds to a vehicle charging demand and charges a vehicle power battery at a first set charging voltage; in response to the fact that the maximum output voltage is larger than or equal to the maximum allowable charging voltage of the power battery, the vehicle-mounted booster is controlled to boost the first set charging voltage in a boost charging mode, the boosted charging voltage is obtained, and the boosted charging voltage is used for charging the power battery; and in response to that the boosted charging voltage reaches a second set charging voltage, a direct connection charging loop between the charging pile and the power battery is controlled to be switched on, so that the charging pile charges the power battery at the maximum allowable charging voltage. According to the invention, high-efficiency and high-power fast charging of the high-voltage platform vehicle on the low-voltage platform charging pile is realized.

Description

TECHNICAL FIELD

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

[0002] In recent years, 800V high-voltage platform electric vehicles have gradually become popular, significantly improving charging efficiency and energy supplement speed. However, there are still a large number of low-voltage platform charging piles with an output voltage lower than the minimum charging requirement of 800V vehicle power batteries in the existing charging infrastructure, which cannot directly charge the vehicle power batteries. Although the low-voltage pile output can be boosted by a vehicle-mounted booster to charge the batteries, it is difficult to efficiently and high-power fast charge. SUMMARY

[0003] The first aspect of the present disclosure provides a vehicle charging control method, comprising: receiving a maximum output voltage fed back by a charging pile in response to a charging demand of a vehicle and charging a vehicle power battery at a first set charging voltage; in response to the maximum output voltage being greater than or equal to a maximum allowable charging voltage of the power battery, controlling a vehicle-mounted booster to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage, and charging the power battery at the boosted charging voltage; in response to the boosted charging voltage reaching a second set charging voltage, controlling a direct connection charging loop between the charging pile and the power battery to be connected, and charging the power battery at the maximum allowable charging voltage.

[0004] The second aspect of the present disclosure provides a vehicle charging control device, comprising: a receiving module configured to receive a maximum output voltage fed back by a charging pile in response to a charging demand of a vehicle and charging a vehicle power battery at a first set charging voltage; a first control module configured to, in response to the maximum output voltage being greater than or equal to a maximum allowable charging voltage of the power battery, control a vehicle-mounted booster to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage, and charge the power battery at the boosted charging voltage; a second control module configured to, in response to the boosted charging voltage reaching a second set charging voltage, control a direct connection charging loop between the charging pile and the power battery to be connected, and charge the power battery at the maximum allowable charging voltage.

[0005] A third aspect of this disclosure provides an electronic device including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor, when executing the program, performs the steps of the method described above.

[0006] A fourth aspect of this disclosure provides a vehicle comprising: processor; Memory used to store processor-executable instructions; The processor is configured as follows: The steps to implement the above method.

[0007] A fifth aspect of this disclosure provides a computer-readable storage medium having computer program instructions stored thereon, which, when executed by a processor, implement the steps of the above-described method.

[0008] The vehicle and its charging control method, device, electronic device and storage medium proposed in the embodiments of this disclosure, during the process of the charging pile responding to the vehicle's charging demand and charging the vehicle's power battery with a first set charging voltage, receive the maximum output voltage fed back by the charging pile, and in response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, control the on-board boost converter to boost the first set charging voltage in boost charging mode to obtain the boosted charging voltage, and use the boosted charging voltage to charge the power battery, and in response to the boosted charging voltage reaching a second set charging voltage, control the connection of the direct charging circuit between the charging pile and the power battery to be turned on, so that the charging pile charges the power battery with the maximum allowable charging voltage. This disclosure utilizes an on-board booster to increase the output voltage of the low-voltage charging pile to near the maximum allowable charging voltage of the power battery in the initial stage. When the boosted voltage reaches a second set charging voltage, it switches to a direct charging circuit between the charging pile and the power battery, enabling the charging pile to directly supply power to the power battery at the maximum allowable charging voltage. This avoids the long-term operation of the on-board booster during the high-power charging phase, significantly reducing energy loss and thermal management burden. At the same time, it enables high-voltage platform vehicles to achieve efficient and high-power fast charging on low-voltage platform charging piles.

[0009] Additional aspects and advantages of this disclosure will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this disclosure. Attached Figure Description

[0010] The above and / or additional aspects and advantages of this disclosure will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the DC charging mode for vehicles in the prior art; Figure 2A schematic diagram of a boost charging mode of a vehicle in the prior art; Figure 3 A flowchart of a vehicle charging control method according to an embodiment of the present disclosure; Figure 4 A schematic diagram of a vehicle charging control method according to an embodiment of the present disclosure; Figure 5 A schematic diagram of an IGBT in a vehicle charging control system according to an embodiment of the present disclosure; Figure 6 A schematic diagram of an EDS upper bridge pass-through mode in a vehicle charging control system according to an embodiment of the present disclosure; Figure 7 A schematic diagram of two charging paths in a vehicle charging control system according to an embodiment of the present disclosure; Figure 8 A timing diagram of a vehicle charging control method according to an embodiment of the present disclosure; Figure 9 A block schematic diagram of a vehicle charging control device according to an embodiment of the present disclosure; Figure 10 A structural schematic diagram of an electronic device according to an embodiment of the present disclosure; Figure 11 A structural schematic diagram of a vehicle according to an embodiment of the present disclosure. DETAILED DESCRIPTION

[0011] Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0012] A vehicle and a charging control method, device, electronic device and storage medium thereof according to an embodiment of the present disclosure are described below with reference to the accompanying drawings.

[0013] The output voltage levels of mainstream direct current charging piles on the market mainly include 500V, 750V and 1000V. For an 800V vehicle, its charging mode is usually divided into the following two types: The first type is a direct charging mode (as shown in FIG. 1): when the maximum output voltage of the charging pile is greater than or equal to the current demand voltage of the power battery in the REESS of the vehicle, the charging pile is connected with the power battery through a direct connection charging circuit to realize the charging of the power battery. Figure 1 The second type is a boost charging mode (as shown in FIG. 2): when the maximum output voltage of the charging pile is less than the current demand voltage of the power battery in the REESS of the vehicle, the charging pile is connected with the power battery through a boost charging circuit to realize the charging of the power battery. The second type is a boost charging mode (as shown in FIG. 2): when the maximum output voltage of the charging pile is less than the current demand voltage of the power battery in the REESS of the vehicle, the charging pile is connected with the power battery through a boost charging circuit to realize the charging of the power battery. Figure 2In the case that the maximum output voltage of the charging pile is less than the current demand voltage of the vehicle power battery, the charging pile output voltage is boosted by the vehicle-mounted booster, and the power battery is charged via the electric drive system (EDS).

[0014] However, due to factors such as cost, space, and thermal management, the power of the vehicle-mounted booster is usually much smaller than the maximum acceptable charging power of the power battery, and is also significantly lower than the hardware capability of the direct charging circuit. Therefore, when using the boosted charging on the charging pile of the low-voltage platform, the charging performance of the vehicle is severely limited.

[0015] The existing DC charging communication protocols such as GB / T and CCS have inherent timing defects: in the charging handshake stage, the vehicle needs to report the target charging voltage to the charging pile first, and then the charging pile feeds back its maximum output capability. Since the vehicle cannot know the real capability of the charging pile in the initial stage, in order to ensure compatibility, the initial charging voltage can only be conservatively set to a lower value (for example, it is processed according to the 500V charging pile), thereby forcing the boosted charging mode.

[0016] To solve this problem, the existing 800V vehicles generally adopt the following two strategies: The first strategy is full-boost strategy: even if a charging pile with higher voltage output capability is received subsequently, the boosted charging is still maintained, which prevents the high-power advantage of the direct charging circuit from being realized. The second strategy is dynamic boosting strategy: in the current boosted charging process, the initial stage is boosted according to the typical output capability of the 500V charging pile, and then if a higher output voltage of the charging pile is received, the boosted charging voltage is dynamically improved, and when the ratio of the output charging voltage of the charging port to the maximum allowable charging voltage of the power battery reaches a preset efficiency optimization interval (for example, the output charging voltage of the charging port is about 90% to 95% times the maximum allowable charging voltage of the power battery, at which point the vehicle-mounted booster is at the highest conversion efficiency point), the voltage ratio is maintained to continue the boosted charging, which also prevents the high-power advantage of the direct charging circuit from being realized.

[0017] Therefore, the vehicle charging control method provided by the present disclosure boosts the output voltage of the low-voltage charging pile to be close to the maximum allowable charging voltage of the power battery in the initial stage by using the vehicle-mounted booster, and when the boosted voltage reaches the second set charging voltage, the direct charging circuit between the charging pile and the power battery is switched, so that the charging pile can directly supply power to the power battery at the maximum allowable charging voltage, thereby avoiding the long-term work of the vehicle-mounted booster in the high-power charging stage, significantly reducing the energy loss and thermal management burden, and realizing efficient and high-power fast charging of the high-voltage platform vehicle on the low-voltage platform charging pile.

[0018] Figure 3A flowchart of a vehicle charging control method according to an embodiment of the present disclosure.

[0019] It should be noted that the vehicle charging control method according to an embodiment of the present disclosure can be applied to a vehicle charging control device, which in some possible embodiments can be configured in an electronic device so that the electronic device can perform a vehicle charging control function.

[0020] As shown in Figure 3 The vehicle charging control method according to an embodiment of the present disclosure includes: S301, receiving the maximum output voltage fed back by the charging pile during the charging process of the vehicle power battery at a first set charging voltage in response to the charging demand of the vehicle.

[0021] It should be emphasized that the vehicle cannot know the actual maximum output voltage capability of the charging pile at the initial stage of charging, therefore, the vehicle first requests a relatively low first set charging voltage (such as 400V or the default voltage of the charging pile, which can also be referred to as the initial voltage) from the charging pile to ensure compatibility and safety; after the completion of the charging handshake and initialization, the charging pile actively feeds back the maximum output voltage it supports to the vehicle through a communication protocol. After receiving the maximum output voltage fed back by the charging pile, the vehicle performs step S302.

[0022] S302, in response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, controlling the on-board voltage booster to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage, and charging the power battery at the boosted charging voltage.

[0023] Exemplarily, in the process of controlling the on-board voltage booster to boost the first set charging voltage in the boost charging mode, the dynamic characteristics of the boosting process need to be controlled to avoid the interruption of charging due to the no-load protection of the charging pile. The reason is that if the voltage rises too fast (for example, exceeds the response capability of the charging pile), it will cause the output voltage of the charging pile to temporarily fail to meet the demand on the vehicle side, resulting in the instantaneous drop or even interruption of the charging current. Many charging piles are provided with a "no-load protection" function, that is, if no continuous current is detected within a certain period of time after the start of charging, the charging will be automatically stopped.

[0024] In addition, because one charging power module cabinet in the same site is connected with multiple charging piles, and some charging piles are also provided with charging guns, the total power of the charging power module is certain, and there are variables in the charging vehicles connected therewith, and there will be a shunt scenario, therefore, if the vehicle requests a large charging current, the actual charging current can have a large fluctuation, and the large fluctuation of the current is not conducive to the control of the boost.

[0025] Therefore, the present disclosure adopts at least one of the following control strategies in the boost phase: controlling the output voltage rising speed of the on-board voltage booster to be less than or equal to a set speed threshold, such as 10 V / s, as shown in Figure 4 controlling the charging current request sent to the charging pile to be less than or equal to a set current threshold, such as 20 A.

[0026] By the above measures, the charging pile of various types can be compatible, and the voltage boosting process is stable and the current is continuous, and safe and reliable conditions are created for subsequent switching to the direct current charging mode.

[0027] S303, in response to the boosted charging voltage reaching a second set charging voltage, controlling the direct connection charging loop between the charging pile and the power battery to be turned on, so that the charging pile charges the power battery at the maximum allowed charging voltage.

[0028] Exemplarily, the second set charging voltage is configured to be slightly lower than the maximum allowed charging voltage of the power battery (such as 90% to 95% of the maximum allowed charging voltage of the power battery), to ensure that before the direct connection charging loop is turned on, the on-board voltage booster has boosted the voltage to be close to the maximum allowed charging voltage of the power battery, thereby avoiding a large current impact during switching. After the direct connection charging loop is turned on, the on-board voltage booster exits the voltage boosting work in the voltage boosting power supply mode, and the charging pile directly supplies power to the power battery at the maximum allowed charging voltage.

[0029] Thus, the present disclosure boosts the output voltage of the low-voltage charging pile to be close to the maximum allowed charging voltage of the power battery by using the on-board voltage booster in the initial stage, and switches to the direct connection charging loop between the charging pile and the power battery when the boosted voltage reaches the second set charging voltage, so that the charging pile can directly supply power to the power battery at the maximum allowed charging voltage, thereby avoiding the long-term work of the on-board voltage booster in the high-power charging stage, significantly reducing the energy loss and thermal management burden, and realizing efficient and high-power fast charging of the high-voltage platform vehicle on the low-voltage charging pile.

[0030] In some embodiments of the present disclosure, before performing the step S301 of controlling the direct connection charging loop between the charging pile and the power battery to be turned on, the following steps can also be performed: controlling the actual charging voltage of the power battery charging to rise from the second set charging voltage to the maximum allowed charging voltage.

[0031] It should be noted that after the boosted charging voltage reaches the second set charging voltage, the request voltage to the charging pile is boosted to the maximum allowed charging voltage, to control the actual charging voltage of the power battery charging to rise from the second set charging voltage to the maximum allowed charging voltage, which can reduce the pressure difference during switching, shorten the switching time, shorten the time without charging current during switching, or reduce the pressure difference when the electric drive system switches to the bridge straight-through, to avoid the impact on the IGBT in the electric drive system.​

[0032] For example, the method of controlling the actual charging voltage for charging the power battery to increase from the second set charging voltage to the maximum allowable charging voltage includes any of the following: The first method involves controlling the on-board boost converter to stop operating in boost charging mode and controlling the switching devices of the upper and lower axle arms in the on-board electric drive system to turn off, waiting for the charging pile to boost the charging voltage to the maximum allowable charging voltage; wherein, the input end of the on-board electric drive system is connected to the on-board boost converter, and the output end of the on-board electric drive system is connected to the power battery system associated with the power battery. The second method involves controlling the on-board booster to stop operating in boost charging mode, and controlling all the switching devices of the upper axle arm and all the switching devices of the lower axle arm in the on-board electric drive system to be turned on, waiting for the charging pile to boost the charging voltage to the maximum allowable charging voltage. The third method involves controlling the on-board booster to stop operating in boost charging mode, and controlling all the switching devices of the lower axle arm in the on-board electric drive system to be turned off and all the switching devices of the lower axle arm to be turned on, waiting for the charging pile to boost the charging voltage to the maximum allowable charging voltage. The advantage of the first method mentioned above is that it avoids drastic voltage surges and current backflow. This is because the IGBT component in the electric drive system contains a freewheeling diode, which has the opposite polarity to the IGBT, such as... Figure 5 As shown. During boost charging, the voltage flows from the collector (C) terminal of the IGBT to the emitter (E) terminal. Simultaneously, a freewheeling diode exists between the emitter and collector terminals. Because the diode has a forward voltage drop, and the IGBT has extremely low internal resistance and no voltage drop during boost charging, the majority of the current flows through the IGBT, not the freewheeling diode. When the vehicle boost converter stops working and the IGBT is turned off, the current can continue to charge the battery through the freewheeling diode. Furthermore, because the freewheeling diode has a very small forward voltage drop, the voltage of the vehicle boost converter (charging station voltage) is clamped by the battery voltage, reaching a maximum of equal to the battery voltage minus the diode's forward voltage drop, almost perfectly close to the battery voltage. Therefore, the following effect is achieved: after the vehicle-mounted booster stops working, the charging voltage loses its control source. Since the requested voltage is the maximum charging voltage of the power battery, the charging pile will increase the voltage according to the requested voltage. However, due to the forward voltage drop of the freewheeling diode, the charging pile can only increase the voltage to the power battery voltage (during the period when the charging voltage increases from 0.9 / 0.95 times the maximum allowable charging voltage of the power battery to the maximum allowable charging voltage, the power battery cannot be charged, and there will be a brief current interruption. This time is related to the speed at which the charging pile increases the voltage and is not fixed). Afterward, the charging current continues to charge the power battery through the freewheeling diode.

[0033] Exemplarily, the second mode has the following disadvantages: it is easy to cause current impact on the IGBT, and it is also easy to cause current backflow to the charging pile (assuming that the charging pile is not equipped with a reverse prevention diode), but the switching time is short, and the charging current interruption time will also be shorter. Switching the electric drive system to the upper bridge pass-through mode is equivalent to closing all three-phase upper bridges of the electric drive system and opening all three-phase lower bridges, which is simplified as shown in FIG. 6. Figure 6 When the on-board voltage booster switches to the upper bridge pass-through mode, the battery voltage is directly equal to the voltage of the on-board voltage booster, which is equivalent to that the voltage of the on-board voltage booster will be charged from 0.9 / 0.95 times the maximum allowable charging voltage of the battery to the maximum allowable charging voltage of the battery in an instant, and then the current impact on the IGBT will be caused. In addition, as a powerful voltage source, the battery will have a large current impact on the charging pile in the instant of the upper bridge pass-through, and the voltage of the charging pile is only 0.9 / 0.95 times the maximum allowable charging voltage of the battery. If the charging pile side does not have a reverse diode, the battery will have a large current impact on the charging pile, which may cause the charging pile to have a state error or even be damaged.

[0034] After the actual charging voltage of the control power battery is increased from the second set charging voltage to the maximum allowable charging voltage, the relays K5 and K6 are closed if the electric drive system is in the upper bridge pass-through mode. It is equivalent to that there are two paths in the charging circuit, the first path is from the charging port to the high-voltage battery through K5 and K6, and the second path is from the charging port to the power battery through the on-board voltage booster and the electric drive system. The first path only exists K5 and K6, and if the first mode is adopted, the second path exists inductance, S1, S6, S7, freewheeling diode, main positive and main negative. If the second mode is adopted, the second path exists inductance, S1, S6, S7, IGBT, main positive and main negative, so the impedance of the first path is much smaller than that of the second path. Before the 20A small current is requested, most of it will pass through the first path.

[0035] In some embodiments of the present disclosure, after the step S301 of controlling the connection of the direct connection charging circuit between the charging pile and the power battery is performed, the on-board voltage booster is controlled to cut off the voltage boosting circuit between the charging pile and the power battery.

[0036] Exemplarily, cutting off the voltage boosting circuit includes the following steps: cutting off the electrical connection between the charging port of the charging pile and the capacitor in the on-board voltage booster, such as cutting off the electrical connection between the charging port of the charging pile and the capacitor in the on-board voltage booster by opening the switch S1, and controlling the electric drive system to discharge the remaining electric quantity of the capacitor in the discharge mode; in response to the remaining electric quantity of the capacitor falling below a set electric quantity threshold, controlling the electrical connection between the capacitor and the electric drive system to be cut off to cut off the voltage boosting circuit, such as cutting off the electrical connection between the capacitor and the electric drive system by opening the switches S6 and S7 to cut off the voltage boosting circuit, and controlling the electric drive system to stop working in the discharge mode.

[0037] It should be noted that after S1 is disconnected, if the charging process has not ended, the voltage measured by the charging pile (i.e., outside S1) will not change significantly and will continue to be maintained at the maximum allowable charging voltage level of the power battery. However, the voltage of the capacitor C on the inside of S1 (close to the side of S6 and S7) will naturally decay because the external power supply is lost. Therefore, the disconnection state of S1 can be diagnosed based on the voltage difference between the inside and outside of S1 after S1 is disconnected.

[0038] In addition, because the capacitor C takes a long time to decay passively without active discharge, it is necessary to actively and controllably discharge the capacitor through the electric drive system to ensure that there is no dangerous voltage left on the capacitor after charging is completed. However, because of the need for subsequent diagnosis of switches S6 and S7, the discharge process can be designed to be incomplete, that is, the voltage of the capacitor C is reduced to a set voltage threshold (such as 60V or lower). This voltage level can ensure operational safety and is sufficient to support voltage difference diagnosis of the states of switches S6 and S7 (because there is still a certain potential difference between the inside and outside).

[0039] In some embodiments of the present disclosure, in response to the charging pile charging the power battery at the maximum allowable charging voltage, the charging current request sent to the charging pile is set to the maximum allowable charging current of the power battery to increase the charging power.

[0040] For example, under the premise that S6 and S7 have been disconnected, the boost circuit is completely isolated, and no current flows through, the charging current request is increased to the maximum allowable value of the power battery, which can effectively avoid the risk of overcurrent and ensure system safety.

[0041] To make the vehicle charging control method of the present disclosure more clearly understood by those skilled in the art, the charging control process is described in detail below in conjunction with the timing diagram shown in FIG. 6: Figure 8 First step: control switches S1, S6, and S7 to be closed, and keep relays K5 and K6 in a disconnected state, so that the on-board voltage booster enters a boost charging mode, and gradually increases the voltage output by the charging pile from an initial voltage (i.e., a first set charging voltage). Second step: in the boost charging mode, the on-board voltage booster increases the charging voltage to a maximum controllable boost charging voltage (i.e., a second set charging voltage, which can be 90% to 95% of the maximum allowable charging voltage of the power battery), and simultaneously increases the request voltage to the maximum allowable charging voltage of the power battery.

[0042] ​Third step: According to the system strategy, one of the following two ways can be used to complete the direct connection charging mode. Among them, the first kind is to control the vehicle-mounted voltage booster to stop boosting work and wait for the charging pile to raise the charging voltage to the maximum allowed charging voltage of the power battery; the second kind is to control the vehicle-mounted voltage booster to switch to the upper bridge through mode (i.e. bypass boosting function, only the upper bridge arm switching device is turned on), which directly connects the charging loop to the battery side, so as to pull up the charging port voltage to the maximum allowed charging voltage of the power battery.

[0043] Fourth step: After confirming that the charging port voltage has reached the maximum allowed charging voltage of the power battery, control the relays K5 and K6 to close to establish a direct connection charging loop between the power battery and the charging pile; at this time, S1, S6 and S7 remain closed.

[0044] Fifth step: control the switch S1 to open to cut off the connection between the charging pile and the input end of the vehicle-mounted voltage booster; K5, K6, S6 and S7 remain closed, and the electric drive system in the vehicle-mounted voltage booster is controlled to work in the discharging mode to actively discharge the energy storage capacitor inside the voltage booster.

[0045] Sixth step: when the capacitor voltage drops to a safety threshold (such as below 60 V), control the switches S6 and S7 to open to completely isolate the boosting loop; at this time, S1 remains open, K5 and K6 remain closed, and the charging current request sent to the charging pile is raised to the maximum allowed charging current of the vehicle power battery to realize high-power direct connection charging.

[0046] In summary, the vehicle charging control method proposed by the embodiment of the present disclosure receives the maximum output voltage feedback by the charging pile during the charging process of the charging pile responding to the vehicle charging demand and charging the vehicle power battery at a first set charging voltage, controls the vehicle-mounted voltage booster to boost the first set charging voltage to obtain a boosted charging voltage in response to the maximum output voltage being greater than or equal to the maximum allowed charging voltage of the power battery, and charges the power battery with the boosted charging voltage, and controls the direct connection charging loop between the charging pile and the power battery to be connected in response to the boosted charging voltage reaching a second set charging voltage, so that the charging pile charges the power battery at the maximum allowed charging voltage. The present disclosure boosts the output voltage of the low-voltage charging pile to approach the maximum allowed charging voltage of the power battery by using the vehicle-mounted voltage booster in the initial stage, and switches to the direct connection charging loop between the charging pile and the power battery when the boosted voltage reaches the second set charging voltage, so that the charging pile can directly supply power to the power battery at the maximum allowed charging voltage, thereby avoiding the long-term work of the vehicle-mounted voltage booster in the high-power charging stage, significantly reducing the energy loss and heat management burden, and realizing efficient and high-power fast charging of the high-voltage platform vehicle on the low-voltage charging pile.

[0047] Figure 9A block schematic diagram of a vehicle charging control device according to an embodiment of the present disclosure.

[0048] As shown in Figure 9 A vehicle charging control device 900 according to an embodiment of the present disclosure includes a receiving module 910, a first control module 920, and a second control module 930.

[0049] The receiving module 910 is configured to receive a maximum output voltage fed back by a charging pile in a charging process in which the charging pile charges a power battery of a vehicle in response to a charging demand of the vehicle at a first set charging voltage. The first control module 920 is configured to control a vehicle-mounted voltage booster to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage and charge the power battery at the boosted charging voltage, in response to the maximum output voltage being greater than or equal to a maximum allowable charging voltage of the power battery. The second control module 930 is configured to control a direct connection charging loop between the charging pile and the power battery to be connected, so that the charging pile charges the power battery at the maximum allowable charging voltage, in response to the boosted charging voltage reaching a second set charging voltage.

[0050] In some embodiments of the present disclosure, before the second control module 930 controls the direct connection charging loop between the charging pile and the power battery to be connected, the second control module 930 is further configured to: control an actual charging voltage of the power battery to rise from the second set charging voltage to the maximum allowable charging voltage.

[0051] In some embodiments of the present disclosure, the second control module 930 is configured to control the actual charging voltage of the power battery to rise from the second set charging voltage to the maximum allowable charging voltage in any one of the following ways: control the vehicle-mounted voltage booster to stop working in the boost charging mode, and control switching devices of an upper bridge arm and a lower bridge arm in a vehicle-mounted electric drive system to be turned off; control the vehicle-mounted voltage booster to stop working in the boost charging mode, and control switching devices of the upper bridge arm in the vehicle-mounted electric drive system to be all turned on and switching devices of the lower bridge arm to be all turned off; control the vehicle-mounted voltage booster to stop working in the boost charging mode, and control switching devices of the lower bridge arm in the vehicle-mounted electric drive system to be all turned off and switching devices of the upper bridge arm to be all turned on. The input end of the vehicle-mounted electric drive system is connected to the vehicle-mounted voltage booster, and the output end of the vehicle-mounted electric drive system is connected to a power battery system associated with the power battery.

[0052] In some embodiments of the present disclosure, the second control module 930 is further configured to: control the on-board voltage booster to cut off the voltage boosting loop between the charging pile and the power battery.

[0053] In some embodiments of the present disclosure, when the second control module 930 controls the on-board voltage booster to cut off the voltage boosting loop between the charging pile and the power battery, the second control module 930 is configured to: cut off the electrical connection between the charging port of the charging pile and the capacitor in the on-board voltage booster, and control the electrical drive system to discharge the capacitor in the discharge mode; in response to detecting that the voltage of the capacitor drops to a set voltage threshold, control the electrical connection between the capacitor and the electrical drive system to be cut off to cut off the voltage boosting loop, and control the electrical drive system to stop working in the discharge mode.

[0054] In some embodiments of the present disclosure, the device further comprises: a setting module configured to, in response to the charging pile charging the power battery at the maximum allowed charging voltage, set the charging current request sent to the charging pile to be the maximum allowed charging current of the power battery, so as to increase the charging power.

[0055] In some embodiments of the present disclosure, when the first control module 920 controls the on-board voltage booster to boost the first set charging voltage in the voltage boosting charging mode, the first control module 920 is configured to perform at least one of the following: control the output voltage rising speed of the on-board voltage booster to be less than or equal to a set speed threshold; control the charging current request sent to the charging pile to be less than or equal to a set current threshold.

[0056] It should be noted that details not disclosed in the vehicle charging control device of the embodiments of the present disclosure can refer to details disclosed in the vehicle charging control method of the embodiments of the present disclosure, which will not be described here in detail.

[0057] According to the vehicle charging control device provided by the embodiment of the present disclosure, when the charging pile is responding to the vehicle charging demand and charging the power battery of the vehicle at a first set charging voltage, the receiving module receives the maximum output voltage fed back by the charging pile, the first control module controls the on-board voltage booster to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage and charges the power battery at the boosted charging voltage when the maximum output voltage is greater than or equal to the maximum allowable charging voltage of the power battery, and the second control module controls the direct connection charging loop between the charging pile and the power battery to be connected when the boosted charging voltage reaches a second set charging voltage, so that the charging pile charges the power battery at the maximum allowable charging voltage. The present disclosure boosts the output voltage of the low-voltage charging pile to the maximum allowable charging voltage of the power battery by using the on-board voltage booster in the initial stage, and switches to the direct connection charging loop between the charging pile and the power battery when the boosted voltage reaches the second set charging voltage, so that the charging pile can directly supply power to the power battery at the maximum allowable charging voltage, thereby avoiding the long-term work of the on-board voltage booster in the high-power charging stage, significantly reducing the energy loss and thermal management burden, and realizing the efficient and high-power fast charging of the high-voltage platform vehicle on the low-voltage charging pile.

[0058] In order to implement the above-mentioned embodiments, the present disclosure further provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the method according to any one of the above-mentioned embodiments.

[0059] Figure 10 is a structural schematic diagram of an electronic device provided by an embodiment of the present disclosure. For example, the electronic device 1000 can be a mobile phone, a computer, a digital broadcast terminal, a messaging device, a game console, a tablet device, a medical device, a fitness device, a personal digital assistant, etc.

[0060] Referring to Figure 10 , the electronic device 1000 can include one or more of the following components: a processing component 1002, a memory 1004, a power component 1006, a multimedia component 1008, an audio component 1010, an input / output (I / O) interface 1012, a sensor component 1014, and a communication component 1016.

[0061] The processing component 1002 generally controls the overall operations of the electronic device 1000, such as operations associated with display, phone calls, data communications, camera operations, and recording operations. The processing component 1002 can include one or more processors 1020 to execute instructions and to complete all or part of steps of the above methods. In addition, the processing component 1002 can include one or more modules to facilitate the interaction between the processing component 1002 and other components. For example, the processing component 1002 can include a multimedia module to facilitate the interaction between the multimedia component 1008 and the processing component 1002.

[0062] The memory 1004 is configured to store various types of data to support operations of the electronic device 1000. Examples of these data include instructions for any application or method operating on the electronic device 1000, contact data, phonebook data, messages, pictures, videos, and the like. The memory 1004 can be implemented by any type of volatile or nonvolatile memory, 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, magnetic disk, or optical disk.

[0063] The power component 1006 provides power to each component of the electronic device 1000. The power component 1006 can include a power management system, one or more power sources, and other components associated with generating, managing, and distributing power for the electronic device 1000.

[0064] Multimedia component 1008 includes a screen that provides an output interface between the electronic device 1000 and the user. In some embodiments, the screen may include a Liquid Crystal Display (LCD) and a Touch Panel (TP). If the screen includes a Touch Panel, the screen may be implemented as a touchscreen to receive input signals from the user. The Touch Panel includes one or more touch sensors to sense touches, swipes, and gestures on the Touch Panel. The touch sensors may sense not only the boundaries of the touch or swipe action but also the duration and pressure associated with the touch or swipe operation. In some embodiments, multimedia component 1008 includes a front-facing camera and / or a rear-facing camera. When the electronic device 1000 is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0065] Audio component 1010 is configured to output and / or input audio signals. For example, audio component 1010 includes a microphone (MIC) configured to receive external audio signals when electronic device 1000 is in an operating mode, such as call mode, recording mode, and voice recognition mode. The received audio signals may be further stored in memory 1004 or transmitted via communication component 1016. In some embodiments, audio component 1010 also includes a speaker for outputting audio signals.

[0066] I / O interface 1012 provides an interface between processing component 1002 and peripheral interface modules, which may be keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, start buttons, and lock buttons.

[0067] The sensor component 1014 includes one or more sensors for providing status assessments for various aspects of the electronic device 1000. For example, the sensor component 1014 can detect an open / closed position of the electronic device 1000, relative positioning of components, such as a display and a keypad of the electronic device 1000, a change in position of the electronic device 1000 or a component of the electronic device 1000, presence or absence of user contact with the electronic device 1000, orientation or acceleration / deceleration / g-force and temperature changes of the electronic device 1000. The sensor component 1014 can include an optical sensor that is configured to detect ambient light, a proximity sensor configured to detect the presence of nearby objects without any physical touch, and a light sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, utilized in an imaging application. In some embodiments, the sensor component 1014 can further include an acceleration sensor, a gyroscope sensor, a magnetic sensor, a pressure sensor, or a temperature sensor.

[0068] The communication component 1016 is configured to facilitate wired or wireless communication between the electronic device 1000 and other devices. The electronic device 1000 can access a wireless network based on a corresponding communication standard, such as WiFi, 4G, or 5G, or a combination thereof. In an example embodiment, the communication component 1016 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In an example embodiment, the communication component 1016 can further include a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module can be implemented based on Radio Frequency Identification (RFID) technology, Infrared Data Association (IrDA) technology, Ultra-WideBand (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0069] In an example embodiment, the electronic device 1000 can be implemented by one or more Application-Specific Integrated Circuits (ASICs), Digital Signal Processors (DSPs), Digital Signal Processing Devices (DSPDs), Programmable Logic Devices (PLDs), Field-Programmable Gate Arrays (FPGAs), controllers, micro-controllers, microprocessors, or other electronic elements for executing the above-described methods.

[0070] In an example embodiment, a computer-readable storage medium including instructions, such as the memory 1004 including instructions, is also provided, which can be executed by the processor 1020 of the electronic device 1000 to complete the above-described methods. For example, the computer-readable storage medium can be a Read-Only Memory (ROM), a Random Access Memory (RAM), a Compact Disc Read-Only Memory (CD-ROM), a magnetic tape, a floppy disk, and an optical data storage device, etc.

[0071] Based on the above embodiments, the present disclosure also proposes a vehicle, comprising: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to implement the steps of the method according to any one of the preceding embodiments.

[0072] Figure 11 A structural schematic diagram of a vehicle provided by an embodiment of the present disclosure is shown in FIG. 11. For example, the vehicle 1100 can be a hybrid vehicle, or can be a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. The vehicle 1100 can be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0073] Referring to Figure 11 The vehicle 1100 can include various subsystems, such as an infotainment system 1110, a perception system 1120, a decision control system 1130, a drive system 1140, and a computing platform 1150. The vehicle 1100 can also include more or fewer subsystems, and each subsystem can include multiple components. In addition, each subsystem and each component of the vehicle 1100 can be interconnected by wired or wireless means.

[0074] In some embodiments, infotainment system 1110 can include a communication system, an entertainment system, and control devices for a vehicle liftgate, among others.

[0075] Sensing system 1120 can include several sensors for sensing information of the environment surrounding vehicle 1100. For example, sensing system 1120 can include a global positioning system (which can be a GPS system, a Beidou system, or other positioning system), an inertial measurement unit (IMU), a lidar, a millimeter wave radar, an ultrasonic radar, and a camera.

[0076] Decision control system 1130 can include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0077] Drive system 1140 can include components that provide motive power for vehicle 1100. In one embodiment, drive system 1140 can include an engine, an energy source, a transmission system, and wheels. The engine can be one or a combination of an internal combustion engine, an electric motor, an air compression engine, or the like. The engine can convert energy provided by the energy source into mechanical energy.

[0078] Some or all functions of vehicle 1100 are controlled by computing platform 1150. Computing platform 1150 can include at least one processor 1151 and memory 1152, which can execute instructions 1153 stored in memory 1152.

[0079] Processor 1151 can be any conventional processor, such as commercially available CPUs. The processor can also include a Graphics Processing Unit (GPU), a Field Programmable Gate Array (FPGA), a System on Chip (SOC), an Application Specific Integrated Circuit (ASIC), or a combination thereof.

[0080] Memory 1152 can be implemented by any type of volatile or nonvolatile memory devices 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, magnetic disks, or optical disks.

[0081] In addition to instructions 1153, memory 1152 can store data, such as road maps, route information, vehicle location, direction, speed, etc. The data stored by memory 1152 can be used by computing platform 1150.

[0082] In embodiments of the present disclosure, processor 1151 can execute instructions 1153 to complete all or part of the steps of the methods described above.

[0083] To implement the above-described embodiments, the present disclosure further provides a computer readable storage medium, having stored thereon a computer program, which, when executed by a processor, implements the steps of the methods described in any one of the preceding method embodiments.

[0084] To implement the above-described embodiments, the present disclosure further provides a computer program product, having stored thereon a computer program, which, when executed by a processor, implements the steps of the methods described in any one of the preceding method embodiments.

[0085] In the description of the specification, the description of the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present disclosure. In the description of the specification, the illustrative description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any suitable manner in any one or more embodiments or examples. In addition, the person skilled in the art can combine and combine the different embodiments or examples described in the specification and the features of the different embodiments or examples, without contradiction.

[0086] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present disclosure, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0087] Any process or method descriptions or descriptions in flow charts or otherwise described herein can be understood as representing code modules, segments, or portions of code which include one or more executable instructions for implementing specific logic functions (or steps) in the process, and the various embodiments of the present disclosure include additional implementations in which the order of steps can be different, including use of simultaneous processes, or the steps can be performed in reverse order, or at least some steps can be performed concurrently, or with prior processes or otherwise, as will be appreciated by those skilled in the art.

[0088] The logic and / or steps represented in flow diagrams or otherwise described herein, for example, can be considered as a sequence of instructions to implement logic functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device, such as a computer-based system, processor- containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. In the context of this specification, a "computer-readable medium" can be any means that can contain, store, communicate, propagate or transport the program for use by or in connection with the instruction execution system, apparatus, or device. The computer-readable medium can be a machine-readable storage device (e.g., magnetic, optical or other) a machine-readable storage diskette (e.g., floppy disk, optical disk, etc.), a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), optical fibers, and a portable compact disc read-only memory (CDROM). Further, the computer-readable medium can even be paper or other suitable medium upon which the program is printed, as the program can be electronically captured, for example via the optical scanner of a device or other electronic capture device, and then compiled, interpreted, or otherwise processed in a suitable manner, if necessary, and stored in a computer memory.

[0089] It should be understood that various aspects of the disclosure can be implemented in hardware, software, firmware or a combination thereof. In the above embodiments, various steps or methods can be implemented in software or firmware that is stored in memory and executed by a suitable instruction execution system. As such, if desired, the various steps or methods can be implemented in hardware, as in another embodiment, using any or a combination of the following technologies, which are all well-known in the art: a discrete logic circuit(s) having logic gates for implementing logic functions upon an application of data signals, an application specific integrated circuit having appropriate combinational logic gates, a programmable gate array(s) (PGA), a field programmable gate array (FPGA), etc.

[0090] Those of skill in the art could readily implement the above described example methods with all or a portion of the disclosed steps carried out by a program for use with a computer system or similar electronic apparatus, where the program is intended for use as intermediate steps to achieve the results indicated herein, where each step (including input, processing, output) can be implemented in hardware or software, and where software implementations can be realized as a computer program on a computer readable medium.

[0091] In addition, each functional unit in each embodiment of the present disclosure can be integrated in one processing module, or each unit can exist physically separately, or two or more units can be integrated in one module. The integrated module can be realized in the form of hardware or in the form of a software functional module. When the integrated module is realized in the form of a software functional module and sold or used as an independent product, it can also be stored in a computer readable storage medium.

[0092] The storage medium mentioned above can be a read-only memory, a magnetic disk or an optical disk, etc. Although the embodiments of the present disclosure have been shown and described above, it should be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure, and those skilled in the art can make changes, modifications, replacements and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A vehicle charging control method, characterized in that, include: During the process of the charging pile responding to the vehicle's charging demand and charging the vehicle's power battery with a first set charging voltage, the maximum output voltage fed back by the charging pile is received. In response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, the vehicle booster is controlled to boost the first set charging voltage in boost charging mode to obtain a boosted charging voltage, and the power battery is charged with the boosted charging voltage. In response to the boosted charging voltage reaching the second set charging voltage, the direct charging circuit between the charging pile and the power battery is connected, so that the charging pile charges the power battery at the maximum allowable charging voltage.

2. The method according to claim 1, characterized in that, Before the control connects the direct charging circuit between the charging pile and the power battery, the method further includes: The actual charging voltage of the power battery is controlled to increase from the second set charging voltage to the maximum allowable charging voltage.

3. The method according to claim 2, characterized in that, The method of controlling the actual charging voltage of the power battery to increase from the second set charging voltage to the maximum allowable charging voltage includes any of the following: Control the on-board booster to stop operating in the boost charging mode, and control the switching devices of the upper and lower axle arms in the on-board electric drive system to turn off; Control the on-board booster to stop operating in the boost charging mode, and control all the switching devices of the upper axle arm and all the switching devices of the lower axle arm in the on-board electric drive system to be turned on and off. Control the on-board booster to stop operating in the boost charging mode, and control all the switching devices of the lower axle arm in the on-board electric drive system to turn off and all the switching devices of the lower axle arm to turn on. The input end of the vehicle electric drive system is connected to the vehicle booster, and the output end of the vehicle electric drive system is connected to the power battery system associated with the power battery.

4. The method according to claim 2 or 3, characterized in that, The method further includes: The vehicle-mounted booster is controlled to disconnect the boost circuit between the charging pile and the power battery.

5. The method according to claim 4, characterized in that, The control of the on-board booster to disconnect the boost circuit between the charging pile and the power battery includes: Disconnect the electrical connection between the charging port of the charging pile and the capacitor in the vehicle booster, and control the electric drive system to discharge the capacitor in discharge mode; In response to detecting that the voltage of the capacitor drops to a set voltage threshold, the electrical connection between the capacitor and the electric drive system is disconnected to cut off the boost circuit, and the electric drive system is controlled to stop operating in the discharge mode.

6. The method according to claim 1, characterized in that, The method further includes: In response to the charging pile charging the power battery at the maximum allowable charging voltage, a charging current request will be sent to the charging pile to set the maximum allowable charging current of the power battery in order to increase the charging power.

7. The method according to claim 1, characterized in that, During the process of controlling the on-board boost converter to boost the first set charging voltage in boost charging mode, the method further includes at least one of the following: The output voltage rise rate of the vehicle-mounted booster is controlled to be less than or equal to a set speed threshold. The charging current request sent to the charging pile is controlled to be less than or equal to a set current threshold.

8. A vehicle charging control device, characterized in that, include: The receiving module is used to receive the maximum output voltage fed back by the charging pile during the process of the charging pile responding to the vehicle's charging demand and charging the vehicle's power battery with a first set charging voltage. The first control module is used to control the on-board boost converter to boost the first set charging voltage in boost charging mode in response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, so as to obtain the boosted charging voltage and charge the power battery with the boosted charging voltage. The second control module is used to control the connection of the direct charging circuit between the charging pile and the power battery in response to the boosted charging voltage reaching the second set charging voltage, so that the charging pile charges the power battery at the maximum allowable charging voltage.

9. The apparatus according to claim 8, characterized in that, Before the second control module is used to control the connection of the direct charging circuit between the charging pile and the power battery, it is also used to: The actual charging voltage of the power battery is controlled to increase from the second set charging voltage to the maximum allowable charging voltage.

10. The apparatus according to claim 9, characterized in that, The second control module is also used for: The vehicle-mounted booster is controlled to disconnect the boost circuit between the charging pile and the power battery.

11. The apparatus according to claim 8, characterized in that, The device further includes: The setting module is used to respond to the charging pile charging the power battery at the maximum allowable charging voltage by sending a charging current request to the charging pile to set the maximum allowable charging current of the power battery in order to increase the charging power.

12. An electronic device, characterized in that, It includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein when the processor executes the program, it implements the steps of the method as described in any one of claims 1-7.

13. A vehicle, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured as follows: Implement the steps of the method as described in any one of claims 1-7.

14. A computer-readable storage medium having computer program instructions stored thereon, characterized in that, When executed by a processor, the program instructions implement the steps of the method described in any one of claims 1-7.

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