Vehicles and their charging control methods, devices, electronic devices and storage media

Abstract

This disclosure proposes a vehicle and its charging control method, device, electronic equipment, and storage medium. The method includes: receiving the maximum output voltage fed back by the charging pile during the charging process of a charging pile responding to the vehicle's charging demand and charging the vehicle's power battery with a first set charging voltage; in response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, controlling an on-board boost converter to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage, and charging the power battery with the boosted charging voltage; in response to the boosted charging voltage reaching a second set charging voltage, controlling the connection of the direct charging circuit between the charging pile and the power battery to be established, so that the charging pile charges the power battery with the maximum allowable charging voltage. This disclosure achieves efficient and high-power fast charging of high-voltage platform vehicles on low-voltage platform charging piles.

Description

Technical Field

[0001] This disclosure relates to the field of vehicle charging technology, and in particular to a vehicle and its charging control method, device, electronic equipment and storage medium. Background Technology

[0002] In recent years, 800V high-voltage electric vehicles have become increasingly popular, significantly improving charging efficiency and recharging speed. However, existing charging infrastructure still largely consists of low-voltage charging piles of 400V and below, whose output voltage is lower than the minimum charging requirements of 800V vehicle power batteries, making direct charging impossible. Although the low-voltage output can be boosted using an onboard voltage booster to charge the battery, efficient and high-power fast charging is difficult. Summary of the Invention

[0003] The first aspect of this disclosure provides a vehicle charging control method, including: 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.

[0004] A second aspect of this disclosure provides a vehicle charging control device, comprising: 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.

[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 2This is a schematic diagram of the boost charging mode for vehicles in the prior art; Figure 3 This is a flowchart of a vehicle charging control method according to an embodiment of the present disclosure; Figure 4 This is a schematic diagram illustrating the boosting of charging voltage by an on-board voltage booster according to an embodiment of this disclosure; Figure 5 This is a schematic diagram of an IGBT in a vehicle charging control system according to an embodiment of the present disclosure; Figure 6 This is a schematic diagram of the electric drive system (EDS) in a vehicle charging control system according to an embodiment of the present disclosure, in a bridge-connected mode. Figure 7 This is a schematic diagram of two charging paths in a vehicle charging control system according to an embodiment of the present disclosure; Figure 8 This is a timing diagram of a vehicle charging control method according to an embodiment of the present disclosure; Figure 9 This is a block diagram of a vehicle charging control device according to an embodiment of the present disclosure; Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of the present disclosure; Figure 11 This is a schematic diagram of the structure of a vehicle provided in an embodiment of the present disclosure. Detailed Implementation

[0011] Embodiments of this disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this disclosure, and should not be construed as limiting this disclosure.

[0012] The following description, with reference to the accompanying drawings, describes a vehicle and its charging control method, apparatus, electronic device, and storage medium according to embodiments of the present disclosure.

[0013] Currently, the mainstream DC charging piles on the market mainly offer three output voltage levels: 500V, 750V, and 1000V. For 800V vehicles, the charging modes are typically divided into the following two types: The first type is direct charging mode (such as...) Figure 1 As shown): When the maximum output voltage of the charging pile is greater than or equal to the current required voltage of the power battery in the vehicle's power battery system REESS, the charging pile is connected to the power battery through a direct charging circuit to achieve charging of the power battery. The second type is boost charging mode (such as...) Figure 2As shown): When the maximum output voltage of the charging pile is less than the current required voltage of the vehicle's power battery, the output voltage of the charging pile is boosted by the on-board booster and then charged by the electric drive system EDS.

[0014] However, due to limitations in cost, space, and thermal management, the power output of on-board boost converters is typically far less than the maximum acceptable charging power of the battery, and also significantly lower than the hardware capabilities of direct-connect charging circuits. Therefore, when using boost charging at low-voltage charging stations, the vehicle's charging performance is severely restricted.

[0015] Existing DC charging communication protocols such as GB / T and CCS have inherent timing defects: during the charging handshake phase, the vehicle must first report the target charging voltage to the charging station before the charging station can respond with its maximum output capacity. Since the vehicle cannot know the actual capacity of the charging station at the initial stage, to ensure compatibility, the initial charging voltage is usually conservatively set to a low value (e.g., based on a 500V charging station), thus forcing the vehicle into boost charging mode.

[0016] To address this issue, existing 800V vehicles generally employ the following two strategies: The first type is the full-process boosting strategy: even if the charging pile has a higher voltage output capability, it still maintains boosting charging, which makes it impossible to take advantage of the high power of the direct charging circuit. The second approach is a dynamic boosting strategy: During the initial boosting charging process, the charging is performed according to the typical output capacity of a 500V charging pile. Subsequently, if a higher output voltage is received from the charging pile, the boosted charging voltage is dynamically increased. When the ratio of the output charging voltage at the charging port to the maximum allowable charging voltage of the power battery reaches a preset efficiency optimization range (for example, the output charging voltage at the charging port is about 90% to 95% of the maximum allowable charging voltage of the power battery, at which point the on-board booster is at its highest conversion efficiency point), this voltage ratio is maintained to continue boosting the charging. However, this also results in the inability to take advantage of the high power of the direct-connected charging circuit.

[0017] To address this, the vehicle charging control method proposed in 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 during the initial stage. When the boosted voltage reaches the second set charging voltage, the method 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. Simultaneously, it achieves efficient and high-power fast charging of high-voltage platform vehicles on low-voltage platform charging piles.

[0018] Figure 3This is a 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 of this disclosure can be applied to a vehicle charging control device. In some possible embodiments, the vehicle charging control device can be configured in an electronic device so that the electronic device can perform vehicle charging control functions.

[0020] like Figure 3 As shown, the vehicle charging control method of this disclosure includes: S301 receives 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.

[0021] It is important to emphasize that the vehicle cannot know the actual maximum output voltage capability of the charging station during the initial charging phase. Therefore, the vehicle first requests a relatively low initial charging voltage from the charging station (such as 400V or the charging station's default voltage, also known as the initial voltage) to ensure compatibility and safety. After the charging handshake and initialization are completed, the charging station actively feeds back its supported maximum output voltage to the vehicle via the communication protocol. After receiving the maximum output voltage from the charging station, the vehicle executes 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, controls the on-board boost converter to boost the first set charging voltage in boost charging mode to obtain the boosted charging voltage, and uses the boosted charging voltage to charge the power battery.

[0023] For example, during the process of controlling the on-board voltage booster to boost the first set charging voltage in boost charging mode, it is necessary to control the dynamic characteristics of the boost process to prevent the charging pile from interrupting charging due to no-load protection. The reason is that if the voltage rises too quickly (e.g., exceeding the charging pile's response capability), the charging pile's output voltage may temporarily fail to keep up with the vehicle's demand, causing a momentary drop in charging current or even interruption. Many charging piles have a "no-load protection" function, which automatically stops charging if no continuous current is detected for a period of time after charging begins.

[0024] In addition, because a single charging power module cabinet at the same site connects to multiple charging piles, and some charging piles have multiple charging guns, the total power of the charging power module is fixed, but the charging vehicles connected to it are variable and there will be current sharing scenarios. Therefore, if a vehicle requests a large charging current, the actual charging current may fluctuate significantly, and such large fluctuations in current are not conducive to voltage boost control.

[0025] Therefore, this disclosure employs at least one of the following control strategies during the boost phase: The output voltage rise rate of the vehicle-mounted booster is controlled to be less than or equal to a set speed threshold, such as 10V / s. Figure 4 As shown; Control the charging current request sent to the charging pile to be less than or equal to a set current threshold, such as 20A.

[0026] The above measures ensure compatibility with various charging piles, guarantee a smooth voltage boosting process and continuous current, and create safe and reliable conditions for subsequent switching to DC charging mode.

[0027] S303, in response to the boosted charging voltage reaching the second set charging voltage, controls the connection of the direct charging circuit between the charging pile and the power battery, so that the charging pile charges the power battery at the maximum allowable charging voltage.

[0028] For example, the second set charging voltage is configured to be slightly lower than the maximum allowable charging voltage of the power battery (e.g., 90% to 95% of the maximum allowable charging voltage of the power battery) to ensure that the on-board boost converter has boosted the voltage to near the maximum allowable charging voltage of the power battery before the direct charging circuit is connected, thereby avoiding excessive current surges during switching. After the direct charging circuit is connected, the on-board boost converter exits the boost operation in boost power supply mode, and the charging pile directly supplies power to the power battery at the maximum allowable charging voltage.

[0029] Therefore, this disclosure utilizes an on-board booster to boost the output voltage of the low-voltage charging pile to near the maximum allowable charging voltage of the power battery in the initial stage, and switches to a direct charging circuit between the charging pile and the power battery when the boosted voltage reaches the second set charging voltage. This allows the charging pile to directly supply power to the power battery at the maximum allowable charging voltage, thereby avoiding the long-term operation of the on-board booster during the high-power charging stage, significantly reducing energy loss and thermal management burden, and realizing efficient and high-power fast charging of high-voltage platform vehicles on low-voltage charging piles.

[0030] In some embodiments of this disclosure, before executing step S301 above, which controls the connection of the direct charging circuit between the charging pile and the power battery, the following steps may also be performed: The actual charging voltage of the power battery is increased from the second set charging voltage to the maximum allowable charging voltage.

[0031] It should be noted that after the boosted charging voltage reaches the second set charging voltage, the requested voltage from the charging pile is increased to the maximum allowable charging voltage. This controls the actual charging voltage of the power battery to increase from the second set charging voltage to the maximum allowable charging voltage. This can reduce the voltage difference during switching, shorten the switching time, shorten the time without charging current during switching, or reduce the voltage difference when the electric drive system switches to the upper bridge direct connection, thus avoiding 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] For example, the disadvantage of the second method is that it is prone to current surges in the IGBT and reverse current flow into the charging station (assuming the charging station is not equipped with anti-reverse diodes). However, the switching time is very short, and the charging current interruption time is also shorter. Switching the electric drive system to the upper bridge pass-through mode is equivalent to closing all three phases of the upper bridge and disconnecting all three phases of the lower bridge, which can be simplified as follows: Figure 6 When the vehicle-mounted boost converter switches to on-bridge pass-through mode, the battery voltage directly equals the boost converter voltage. This means the boost converter voltage instantly charges from 0.9 / 0.95 times the battery's maximum allowable charging voltage to the battery's maximum allowable charging voltage, causing a current surge to the IGBT. Furthermore, as a powerful voltage source, the battery's voltage is only 0.9 / 0.95 times the battery's maximum allowable charging voltage at the moment of on-bridge pass-through. If the charging pile does not have a reverse diode, the battery will generate a large current that surges through the charging pile, potentially causing charging pile status errors or even damage.

[0034] After the actual charging voltage of the power battery increases from the second set charging voltage to the maximum allowable charging voltage, relays K5 and K6 are closed if the electric drive system is in the upper bridge direct-through mode. This is equivalent to two paths in the charging circuit: the first path goes from the charging port through K5 and K6 to the high-voltage battery, and the second path goes from the charging port through the vehicle boost converter and then through the electric drive system to the power battery. The first path only involves K5 and K6. If the first method is used, the second path includes an inductor, S1, S6, S7, a freewheeling diode, and a main positive and main negative diode. If the second method is used, the second path includes an inductor, S1, S6, S7, an IGBT, and a main positive and main negative diode. Therefore, the impedance of the first path is much smaller than that of the second path. The previously requested 20A small current will mostly pass through the first path.

[0035] In some embodiments of this disclosure, after controlling the connection of the direct charging circuit between the charging pile and the power battery in step S301, the vehicle-mounted booster is also controlled to disconnect the boost circuit between the charging pile and the power battery.

[0036] For example, disconnecting the boost circuit includes the following steps: Disconnect the electrical connection between the charging port of the charging pile and the capacitor in the vehicle booster, such as by disconnecting switch S1, and control the electric drive system to discharge the remaining charge of the capacitor in discharge mode. In response to the remaining charge of the capacitor dropping to a set charge threshold, the electrical connection between the capacitor and the electric drive system is disconnected to cut off the boost circuit. For example, the electrical connection between the capacitor and the electric drive system is disconnected by disconnecting switches S6 and S7 to cut off the boost circuit, and the electric drive system is controlled to stop operating in discharge mode.

[0037] It should be noted that after S1 is disconnected, if the charging process has not yet ended, the voltage at the charging pile (i.e., outside S1) will not change significantly and will continue to maintain the maximum allowable charging voltage level of the power battery. However, the voltage of capacitor C on the inside of S1 (closer to S6 and S7) will naturally decrease due to the loss of external power supply. Therefore, the disconnection status of S1 can be diagnosed based on the voltage difference between the inside and outside of S1 after S1 is disconnected.

[0038] Furthermore, since passive discharge of capacitor C without active discharge takes a long time, it is necessary to actively and controllably discharge it via an electric drive system to ensure that no dangerous voltage remains on the capacitor after charging. However, for the needs of subsequent diagnostics of switches S6 and S7, this discharge process can be designed as an incomplete discharge, that is, reducing the voltage of capacitor C to a set voltage threshold (such as below 60V). This voltage level ensures operational safety and is sufficient to support voltage difference diagnosis of the S6 and S7 switch states (because there is still a certain potential difference between the inner and outer sides).

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

[0040] For example, since the current carrying capacity of the boost circuit (especially its negative circuit) is limited and cannot support the vehicle's maximum permissible charging current, it is necessary to ensure that the charging current request can only be increased after the boost circuit is completely disconnected. For instance, if S6 and S7 are both disconnected, the boost circuit is completely isolated, and no current flows through it, then increasing the charging current request to the maximum permissible value of the power battery can effectively avoid overcurrent risks and ensure system safety.

[0041] To facilitate a clearer understanding of the vehicle charging control method disclosed herein by those skilled in the art, the following is combined with... Figure 8 The timing diagram shown below provides a detailed explanation of the charging control process: Step 1: Close control switches S1, S6 and S7, while keeping relays K5 and K6 in the open state, so that the vehicle booster enters the boost charging mode and gradually increases the voltage output by the charging pile from the initial voltage (i.e. the first set charging voltage); Step 2: In boost charging mode, the on-board booster will increase the charging voltage to the maximum controllable boost charging voltage (i.e., the second set charging voltage, such as 90% to 95% of the maximum allowable charging voltage of the power battery), and simultaneously request the voltage from the charging pile to increase it to the maximum allowable charging voltage of the power battery.

[0042] Step 3: According to the system strategy, the transition to direct charging mode can be completed using one of the following two methods. First, control the on-board booster to stop boosting voltage and wait for the charging pile to raise the charging voltage to the maximum allowable charging voltage of the power battery. Second, control the on-board booster to switch to the upper bridge direct-connect mode (i.e., bypass boost function, only conducting the upper bridge arm switching devices), directly connecting the charging circuit to the battery side, thereby raising the charging port voltage to the maximum allowable charging voltage of the power battery.

[0043] Step 4: After confirming that the charging port voltage has reached the maximum allowable charging voltage of the power battery, control relays K5 and K6 to close, establishing a direct charging circuit between the power battery and the charging pile; at this time, S1, S6 and S7 remain closed.

[0044] Step 5: Control switch S1 is turned off to disconnect the connection between the charging pile and the input terminal of the vehicle booster; K5, K6, S6 and S7 remain closed and control the electric drive system in the vehicle booster to work in discharge mode to actively discharge the energy storage capacitor inside the booster.

[0045] Step 6: When the capacitor voltage drops to a safe threshold (e.g., below 60 V), control switches S6 and S7 are disconnected, completely isolating the boost circuit. At this time, S1 remains open, K5 and K6 remain closed, and the charging current request sent to the charging pile is increased to the maximum allowable charging current of the vehicle's power battery to achieve high-power direct charging.

[0046] In summary, the vehicle charging control method proposed in this embodiment receives 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. In response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, the on-board boost converter is controlled to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage. The boosted charging voltage is then used to charge the power battery. In response to the boosted charging voltage reaching a 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 with the maximum allowable charging voltage. This disclosure utilizes an on-board booster to boost 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, while simultaneously achieving efficient and high-power fast charging of high-voltage platform vehicles on low-voltage charging piles.

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

[0048] like Figure 9 As shown, the vehicle charging control device 900 of this embodiment includes: a receiving module 910, a first control module 920, and a second control module 930.

[0049] The receiving module 910 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 920 is used to control the vehicle booster 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 930 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.

[0050] In some embodiments of this disclosure, before the second control module 930 is configured to connect the direct charging circuit between the charging pile and the power battery, it is further configured 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.

[0051] In some embodiments of this disclosure, the second control module 930 controls the actual charging voltage of the power battery to increase from the second set charging voltage to the maximum allowable charging voltage in any of the following ways: 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.

[0052] In some embodiments of this disclosure, the second control module 930 is further configured to: The vehicle-mounted booster is controlled to disconnect the boost circuit between the charging pile and the power battery.

[0053] In some embodiments of this disclosure, when the second control module 930 controls the on-board booster to disconnect the boost circuit between the charging pile and the power battery, it 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.

[0054] In some embodiments of this disclosure, the apparatus 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.

[0055] In some embodiments of this disclosure, the first control module 920 is used to control the on-board boost converter to boost the first set charging voltage in a boost charging mode, including 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.

[0056] It should be noted that for details not disclosed in the vehicle charging control device of this disclosure, please refer to the details disclosed in the vehicle charging control method of this disclosure, which will not be repeated here.

[0057] According to the vehicle charging control device of this disclosure, during the process of a charging pile responding to a vehicle's charging demand and charging the vehicle's power battery with a first set charging voltage, a receiving module receives the maximum output voltage fed back by the charging pile. A first control module, in response to the maximum output voltage being greater than or equal to the maximum allowable charging voltage of the power battery, controls an on-board boost converter to boost the first set charging voltage in a boost charging mode to obtain a boosted charging voltage. The boosted charging voltage is then used to charge the power battery. A second control module, in response to the boosted charging voltage reaching a second set charging voltage, controls the connection of a direct charging circuit between the charging pile and the power battery, so that the charging pile charges the power battery with the maximum allowable charging voltage. This disclosure utilizes an on-board booster to boost 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, while simultaneously achieving efficient and high-power fast charging of high-voltage platform vehicles on low-voltage charging piles.

[0058] To implement the above embodiments, this disclosure also proposes an electronic device, including 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 of the foregoing embodiments.

[0059] Figure 10 This is a schematic diagram of the structure of an electronic device provided in an embodiment of this disclosure. For example, the electronic device 1000 may be a mobile phone, computer, digital broadcasting terminal, messaging device, game console, tablet device, medical device, fitness equipment, personal digital assistant, etc.

[0060] Reference Figure 10 The electronic device 1000 may 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] Processing component 1002 typically controls the overall operation of electronic device 1000, such as operations associated with display, telephone calls, data communication, camera operation, and recording operations. Processing component 1002 may include one or more processors 1020 to execute instructions to perform all or part of the steps of the methods described above. Furthermore, processing component 1002 may include one or more modules to facilitate interaction between processing component 1002 and other components. For example, processing component 1002 may include a multimedia module to facilitate interaction between multimedia component 1008 and processing component 1002.

[0062] Memory 1004 is configured to store various types of data to support the operation of electronic device 1000. Examples of this data include instructions for any application or method operating on electronic device 1000, contact data, phonebook data, messages, pictures, videos, etc. Memory 1004 can 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 storage, flash memory, magnetic disk, or optical disk.

[0063] Power component 1006 provides power to the various components of electronic device 1000. Power component 1006 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to 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] Sensor assembly 1014 includes one or more sensors for providing state assessments of various aspects of electronic device 1000. For example, sensor assembly 1014 may detect the on / off state of electronic device 1000, the relative positioning of components such as the display and keypad of electronic device 1000, changes in position of electronic device 1000 or a component of electronic device 1000, the presence or absence of user contact with electronic device 1000, the orientation or acceleration / deceleration of electronic device 1000, and temperature changes of electronic device 1000. Sensor assembly 1014 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 1014 may also include an optical sensor, such as a complementary metal-oxide-semiconductor (CMOS) or charge-coupled device (CCD) image sensor, for use in imaging applications. In some embodiments, sensor assembly 1014 may also include an accelerometer, gyroscope, magnetometer, pressure sensor, or temperature sensor.

[0068] Communication component 1016 is configured to facilitate wired or wireless communication between electronic device 1000 and other devices. Electronic device 1000 can access wireless networks based on communication standards, such as WiFi (Wireless Fidelity), 4G (Fourth Generation), or 5G (Fifth Generation), or combinations thereof. In one exemplary embodiment, communication component 1016 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 1016 also includes a Near Field Communication (NFC) module to facilitate short-range communication. For example, the NFC module may be based on Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra-Wideband (UWB), Bluetooth, and other technologies.

[0069] In an exemplary embodiment, the electronic device 1000 may 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, microcontrollers, microprocessors, or other electronic components to perform the methods described above.

[0070] In an exemplary embodiment, a computer-readable storage medium including instructions is also provided, such as a memory 1004 including instructions, which can be executed by a processor 1020 of an electronic device 1000 to perform the above-described method. For example, the computer-readable storage medium may be a read-only memory (ROM), a random access memory (RAM), a compact disc read-only memory (CD-ROM), magnetic tape, floppy disk, and optical data storage device, etc.

[0071] Based on the above embodiments, this disclosure also proposes a vehicle, including: a processor; a memory for storing processor-executable instructions; wherein the processor is configured to: implement the steps of the method as described in any of the foregoing embodiments.

[0072] Figure 11 This is a schematic diagram of the structure of a vehicle provided in an embodiment of this disclosure. For example, vehicle 1100 can be a hybrid vehicle, a non-hybrid vehicle, an electric vehicle, a fuel cell vehicle, or other types of vehicles. Vehicle 1100 can be an autonomous vehicle, a semi-autonomous vehicle, or a non-autonomous vehicle.

[0073] Reference Figure 11 The vehicle 1100 may 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 may also include more or fewer subsystems, and each subsystem may include multiple components. Furthermore, each subsystem and each component of the vehicle 1100 can be interconnected via wired or wireless means.

[0074] In some embodiments, the infotainment system 1110 may include a communication system, an entertainment system, and a control device for raising and lowering the vehicle roof.

[0075] The perception system 1120 may include several types of sensors for sensing information about the environment surrounding the vehicle 1100. For example, the perception system 1120 may include a global positioning system (which may be a GPS system, a BeiDou system, or another positioning system), an inertial measurement unit (IMU), a lidar, a millimeter-wave radar, an ultrasonic radar, and a camera device.

[0076] The decision control system 1130 may include a computing system, a vehicle controller, a steering system, a throttle, and a braking system.

[0077] The drive system 1140 may include components that provide powered motion to the vehicle 1100. In one embodiment, the drive system 1140 may include an engine, an energy source, a transmission system, and wheels. The engine may be one or a combination of internal combustion engines, electric motors, and compressed air engines. The engine is capable of converting energy provided by the energy source into mechanical energy.

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

[0079] Processor 1151 can be any conventional processor, such as a commercially available CPU. Processors may also include graphics processing units (GPUs), field-programmable gate arrays (FPGAs), systems-on-chips (SoCs), application-specific integrated circuits (ASICs), or combinations thereof.

[0080] The memory 1152 can 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 storage, flash memory, magnetic disk or optical disk.

[0081] In addition to instruction 1153, memory 1152 can also store data, such as road maps, route information, vehicle position, direction, speed, and other data. The data stored in memory 1152 can be used by computing platform 1150.

[0082] In this embodiment of the disclosure, processor 1151 may execute instructions 1153 to complete all or part of the steps of the above-described method embodiments.

[0083] To implement the above embodiments, this disclosure also proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the method as described in any of the foregoing method embodiments.

[0084] To implement the above embodiments, this disclosure also proposes a computer program product having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method as described in any of the foregoing method embodiments.

[0085] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0086] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this disclosure, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0087] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing custom logic functions or processes, and the scope of preferred embodiments of this disclosure includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functions involved, as will be understood by those skilled in the art to which embodiments of this disclosure pertain.

[0088] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-including system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and compact disc read-only memory (CDROM). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0089] It should be understood that various parts of this disclosure can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0090] Those skilled in the art will understand that all or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware. The program can be stored in a computer-readable storage medium, and when executed, the program includes one or a combination of the steps of the method embodiments.

[0091] Furthermore, the functional units in the various embodiments of this disclosure can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as 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 disk, or an optical disk, etc. Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure.

Claims

1. A 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. 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.

2. The method according to claim 1, 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.

3. The method according to claim 1 or 2, 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.

4. The method according to claim 3, 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.

5. 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.

6. 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.

7. 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. The second control module, before controlling the connection of the direct charging circuit between the charging pile and the power battery, is further used for: The actual charging voltage of the power battery is controlled to increase from the second set charging voltage to the maximum allowable charging voltage.

8. The apparatus according to claim 7, 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.

9. The apparatus according to claim 7, 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.

10. 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 1-6.

11. A vehicle, characterized in that, include: processor; Memory used to store processor-executable instructions; The processor is configured as follows: The steps of implementing the method as described in any one of claims 1-6.

12. 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 1-6.

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