Charging control method, device and equipment of electric driving system, medium and vehicle

Abstract

The invention discloses a charging control method, device and equipment of an electric driving system, a medium and a vehicle. The electric driving system comprises a common mode filter. The charging control method of the electric driving system comprises the following steps: acquiring a battery voltage of a battery under the condition that charging equipment is connected to a charging port; in the first charging mode, the product of the battery voltage and the voltage regulation ratio is calculated, and a request voltage value corresponding to the voltage regulation ratio is obtained; wherein the first charging mode comprises a charging mode in which the charging current is smaller than a first current threshold value; and sending a charging request containing the request voltage value to the charging equipment, so that the charging equipment provides an output voltage of the request voltage value. According to the embodiment of the invention, the method can reduce the magnetic loss and heat generated by a common-mode filter through requesting a proper output voltage from the charging equipment, improves the heating problem in a boost charging mode, and improves the reliability of a boost charging function.

Description

Technical Field

[0001] The present application belongs to the field of charging control technology, and in particular, relates to a charging control method, device, equipment, medium and vehicle for an electric drive system. Background Art

[0002] With the continuous development of the new energy vehicle field, the popularity of new energy vehicles continues to increase, and the battery voltage of batteries installed in new energy vehicles is also increasing.

[0003] At present, the output voltage that the popular charging equipment can provide is not enough to meet the charging requirements of new energy vehicles with high-voltage platforms. Therefore, the electric drive system is usually improved so that the electric drive system can integrate a boost charging function to charge the battery after boosting the output voltage of the charging equipment.

[0004] However, in electric drive systems, in order to suppress the noise interference generated under driving conditions, a common mode filter is usually set on the electric drive system. This common mode filter can effectively suppress noise interference under the condition of battery-driven motors. However, when the electric drive system switches to boost charging mode, since the charging currents of each phase in the three-phase circuit are in the same direction, the common mode filter will generate large magnetic losses, and the magnetic ring on the common mode filter will heat up more seriously, which may even cause overheating and damage to the common mode filter and other devices. Summary of the invention

[0005] The embodiments of the present application provide a charging control method, device, equipment, medium and vehicle for an electric drive system, which can improve the problem that the electric drive system is prone to heat generation in a boost charging mode.

[0006] In a first aspect, an embodiment of the present application provides a charging control method for an electric drive system, wherein the electric drive system includes a common mode filter; the charging control method for the electric drive system includes:

[0007] When the charging device is connected to the charging port, the battery voltage of the battery is obtained;

[0008] In a first charging mode, a product of a battery voltage and a voltage regulation ratio is calculated to obtain a requested voltage value corresponding to the voltage regulation ratio; wherein the first charging mode includes a charging mode in which a charging current is less than a first current threshold;

[0009] A charging request including a requested voltage value is sent to the charging device, so that the charging device provides an output voltage of the requested voltage value.

[0010] In some embodiments, calculating the product of the battery voltage and the voltage regulation ratio to obtain a requested voltage value corresponding to the voltage regulation ratio includes:

[0011] Calculating the product of the battery voltage and at least two voltage adjustment ratios to obtain the voltage values ​​to be selected corresponding to the respective voltage adjustment ratios;

[0012] Based on the charging voltage range of the charging device, a requested voltage value is determined from various voltage values ​​to be selected.

[0013] In some embodiments, in some embodiments, based on the charging voltage range of the charging device, determining the requested voltage value from various voltage values ​​to be selected includes:

[0014] Calculating the voltage ranges to be selected corresponding to the voltage values ​​to be selected, wherein the difference between each voltage value to be selected and any voltage value in the corresponding voltage range to be selected satisfies a preset error range;

[0015] The charging voltage range of the charging device is matched with each voltage range to be selected to obtain a requested voltage value; wherein the requested voltage value is within the overlap range between the charging voltage range and at least one voltage range to be selected.

[0016] In some embodiments, the voltage regulation ratio includes 1 / 3 and 2 / 3.

[0017] In some embodiments, the first charging mode includes at least a pre-charging mode; in the first charging mode, before calculating the product of the battery voltage and the voltage regulation ratio to obtain the requested voltage value corresponding to the voltage regulation ratio, the method further includes:

[0018] In the pre-charge mode, the battery voltage is compared with the set voltage threshold;

[0019] When the battery voltage is greater than a set voltage threshold, the voltage regulation ratio is set to 1 / 3; wherein the set voltage threshold is associated with the maximum output voltage of the charging device;

[0020] When the battery voltage is less than or equal to the set voltage threshold, the voltage regulation ratio is set to 2 / 3.

[0021] In some embodiments, the charging control method of the electric drive system further includes:

[0022] In the second charging mode, the minimum value of the charging current is set as a second current threshold; wherein the second current threshold is greater than or equal to a saturation current value of the common mode filter.

[0023] In some embodiments, the electric drive system includes a motor controller and a motor, the motor controller includes three bridge arm groups, the motor includes three winding inductors corresponding to the three bridge arm groups, each bridge arm group and the corresponding winding inductor form a charging branch; the charging control method of the electric drive system also includes:

[0024] In the first charging mode, a first boost control signal, a second boost control signal and a third boost control signal are respectively provided to the three charging branches; wherein the phases of any two of the first boost control signal, the second boost control signal and the third boost control signal are inconsistent.

[0025] In some embodiments, a phase difference of one of the second boost control signal and the third boost control signal with respect to the first boost control signal is 120°, and a phase difference of the other of the second boost control signal and the third boost control signal with respect to the first boost control signal is -120°.

[0026] In a second aspect, an embodiment of the present application further provides a charging control device for an electric drive system, the charging control device for the electric drive system comprising:

[0027] An acquisition module, used for acquiring a battery voltage of a battery when a charging device is connected to a charging port;

[0028] A calculation module, configured to calculate the product of the battery voltage and the voltage regulation ratio in a first charging mode to obtain a requested voltage value corresponding to the voltage regulation ratio; wherein the first charging mode includes a charging mode in which the charging current is less than a first current threshold;

[0029] The request module is used to send a charging request including a requested voltage value to the charging device, so that the charging device provides an output voltage of the requested voltage value.

[0030] In a third aspect, an embodiment of the present application further provides a charging control device for an electric drive system, the charging control device for the electric drive system comprising: a processor and a memory storing computer program instructions;

[0031] When the processor executes the computer program instructions, the charging control method of the electric drive system of the first aspect is implemented.

[0032] In a fourth aspect, an embodiment of the present application further provides a computer-readable storage medium having computer program instructions stored thereon, and when the computer program instructions are executed by a processor, the charging control method of the electric drive system of the first aspect is implemented.

[0033] In a fifth aspect, an embodiment of the present application further provides a vehicle, the vehicle comprising at least one of the charging control device of the electric drive system of the second aspect, the charging control device of the electric drive system of the third aspect, or the computer-readable storage medium of the fourth aspect.

[0034] The charging control method, device, equipment, medium and vehicle of the electric drive system provided in the embodiment of the present application can obtain the battery voltage of the battery when the charging device is connected to the charging port. In the first charging mode with a small charging current, the device can determine the corresponding requested voltage value according to the product of the voltage adjustment ratio and the battery voltage, and send a charging request to the charging device so that the charging device provides an output voltage of the requested voltage value. When the output voltage of the charging device and the battery voltage satisfy the corresponding relationship of the voltage adjustment ratio, the current superposition ripple of the common mode current flowing through the common mode filter is smaller than that of other output voltages. When the current ripple of the common mode current is small, the magnetic loss generated by the common mode filter can be effectively reduced, and the heat generated by the common mode filter can be avoided. Excessive heat is generated, the problem of easy heating of the electric drive system in the boost charging mode is improved, and the reliability of the boost charging function is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments of the present application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0036] Figure 1 is a flow chart of a charging control method for an electric drive system provided in one embodiment of the present application;

[0037] Figure 2 is a schematic diagram of the circuit structure of an electric drive system provided in one embodiment of the present application;

[0038] Figure 3 is a flow chart of a charging control method for an electric drive system provided in another embodiment of the present application;

[0039] Figure 4 is a schematic diagram of a current ripple curve provided by an embodiment of the present application;

[0040] Figure 5 is a flow chart of a charging control method for an electric drive system provided by another embodiment of the present application;

[0041] Figure 6 is a schematic diagram of a current waveform in a boost charging mode in the related art;

[0042] Figure 7 is a schematic diagram of a current waveform in a boost charging mode according to an embodiment of the present application;

[0043] Figure 8 A schematic diagram of the structure of a charging control device for an electric drive system provided in one embodiment of the present application;

[0044] Fig. 9 A schematic diagram of the structure of a charging control device for an electric drive system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0046] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0047] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the term "comprises" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0048] With the continuous development of the new energy vehicle field, the popularity of new energy vehicles continues to increase, and the battery voltage of batteries installed in new energy vehicles is also increasing.

[0049] At present, the output voltage that the popular charging equipment can provide is not enough to meet the charging requirements of new energy vehicles with high-voltage platforms. Therefore, the electric drive system is usually improved so that the electric drive system can integrate a boost charging function to charge the battery after boosting the output voltage of the charging equipment.

[0050] However, in electric drive systems, in order to suppress the noise interference generated under driving conditions, a common mode filter is usually set on the electric drive system. This common mode filter can effectively suppress noise interference under the condition of battery-driven motors. However, when the electric drive system switches to boost charging mode, since the current directions of each phase in the three-phase circuit are consistent, the common mode filter will generate large magnetic losses, and the magnetic ring on the common mode filter will heat up more seriously, which may even cause overheating and damage to the common mode filter and other devices.

[0051] In order to solve the above technical problems, the embodiments of the present application provide a charging control method, device, equipment, medium and vehicle for an electric drive system. The charging control method for an electric drive system provided by the embodiments of the present application is described in detail below with reference to the accompanying drawings through some embodiments and their application scenarios.

[0052] Figure 1 A schematic flow chart of a charging control method for an electric drive system provided by an embodiment of the present application is shown. The electric drive system includes a common mode filter. The charging control method for the electric drive system includes:

[0053] S110, when the charging device is connected to the charging port, obtaining the battery voltage of the battery;

[0054] S120, in a first charging mode, calculating the product of the battery voltage and the voltage adjustment ratio to obtain a requested voltage value corresponding to the voltage adjustment ratio; wherein the first charging mode includes a charging mode in which the charging current is less than a first current threshold;

[0055] S130: Send a charging request including a requested voltage value to a charging device, so that the charging device provides an output voltage of the requested voltage value.

[0056] The charging control method of the electric drive system provided in the embodiment of the present application includes a motor, a motor controller, and a common mode filter connected between the motor and the motor controller. Under the driving condition, the common mode filter can suppress noise interference; under the boost charging condition, the charging control method of the electric drive system in the following real-time example can effectively reduce the magnetic loss generated by the common mode filter, improve the problem of overheating when realizing the common mode filtering function under the boost charging condition, and ensure the stable operation of the electric drive system.

[0057] In this embodiment, when the charging device is connected to the charging port, the device can obtain the battery voltage of the battery. In the first charging mode with a small charging current, the device can determine the corresponding requested voltage value according to the product of the voltage adjustment ratio and the battery voltage, and send a charging request to the charging device so that the charging device provides an output voltage of the requested voltage value. When the output voltage of the charging device and the battery voltage satisfy the corresponding relationship of the voltage adjustment ratio, the current superposition ripple of the common-mode current flowing through the common-mode filter is smaller than that of other output voltages. When the current ripple of the common-mode current is small, the magnetic loss generated by the common-mode filter can be effectively reduced, and the heat generated by the common-mode filter can be avoided. Excessive heat is generated, the problem of easy heating of the electric drive system in the boost charging mode is improved, and the reliability of the boost charging function is improved.

[0058] In S110 , the electric drive system may include a motor, a motor controller, and a common mode filter connected between the motor and the motor controller. Figure 2An example of an electric drive system including a common mode filter is shown, in which a battery can be connected to a motor through a motor controller, and the motor controller can invert the battery voltage output by the battery, thereby converting the DC voltage into a three-phase AC voltage to power the motor. The common mode filter can be arranged between the motor and the motor controller, for example, the three-phase output terminal of the motor and the three-phase input terminal of the motor controller can be connected through a copper bar, and the copper bar can pass through the magnetic ring of the common mode filter, that is, the magnetic ring is sleeved on the copper bar. Under the driving condition, the common mode filter can suppress noise interference.

[0059] The above electric drive system can also be integrated with a boost charging function. Figure 2 As shown, when the charging device is connected to the charging port, the battery stops driving the motor. At this time, if the output voltage of the charging device can directly meet the charging needs of the battery, the charging port can be directly connected to the battery. At this time, the positive and negative poles of the charging device are respectively connected to the positive and negative poles of the battery, and the charging device can directly charge the battery. However, due to the continuous development of new energy vehicles, the output voltage that traditional charging devices can provide is usually much smaller than the battery voltage, and the charging function cannot be realized by directly providing the charging device and the output voltage to the battery.

[0060] For the above-mentioned charging devices with low output voltage that cannot meet the battery charging requirements, the charging port can be connected to the motor and motor controller through a boost module. The boost module, motor and motor controller can jointly form a boost circuit to boost the output voltage of the charging device and provide it to the battery to charge the battery. At this time, the electric drive system is in charging mode and can realize the boost charging function.

[0061] like Figure 2 As shown, the boost module can be integrated into the motor controller. In another embodiment, the boost module can also be provided separately and connected to the motor, the motor controller and the charging port respectively.

[0062] When a charging device is connected to the charging port, a charging control device of the electric drive system can obtain the battery voltage of the battery.

[0063] As an optional implementation, the charging control device of the electric drive system can be a BMS (Battery Management System) connected to the battery, or a VCU (Vehicle Control Unit) of a new energy vehicle, or other modules that can realize signal transmission and charging control. If the device is a BMS, the battery voltage of the battery can be directly obtained. If the device is another control module, it can communicate with the BMS to obtain the current battery voltage of the battery from the BMS.

[0064] In S120, the electric drive system is not in a driving condition but in a charging mode during the process of realizing the boost charging function. The charging mode can be divided into a first charging mode and other charging modes according to the size of the charging current. For example, the charging mode when the charging current is less than the first current threshold can be divided into the first charging mode.

[0065] The electric drive system can usually include multiple stages to realize the boost charging function, such as a pre-charging stage, a battery heating stage, a fast charging stage, and a trickle charging stage. In the pre-charging stage, the battery heating stage, and the trickle charging stage, the charging current is usually small. In the fast charging stage, the charging current is usually large. According to the first current threshold, when the charging current is less than the first current threshold, it can be determined that the charging mode at this time is the first charging mode.

[0066] It should be noted that in the first charging mode, since the charging current is small and the current directions of the three boost charging circuits formed by the motor and the motor controller are consistent, during the boost charging process, the common mode filter will generate large magnetic losses under multiple currents in the same direction, causing the common mode filter to generate heat, which in turn causes problems such as overheating and damage. When the charging current is large, the common mode filter is in a saturated state, at which time the magnetic loss on the common mode filter is small, and no large heat is generated, so no problems such as overheating and damage are caused.

[0067] Please refer to Figure 3 As an optional embodiment, the above S120 may include:

[0068] S210, in the first charging mode, calculating the product of the battery voltage and at least two voltage adjustment ratios to obtain voltage values ​​to be selected corresponding to the respective voltage adjustment ratios;

[0069] S220: Determine a requested voltage value from various voltage values ​​to be selected based on the charging voltage range of the charging device.

[0070] In this embodiment, in the first charging mode with a relatively small charging current, the product of the battery voltage and each voltage adjustment ratio can be calculated to obtain a plurality of voltage values ​​to be selected. The device can determine a suitable requested voltage value from the plurality of voltage values ​​to be selected according to the charging voltage range of the charging device, so that the charging device can provide an output voltage of the requested voltage value.

[0071] In S210, in the first charging mode with a relatively small charging current, after acquiring the battery voltage of the battery, the device may calculate the product of the battery voltage and the voltage adjustment ratio to obtain a corresponding requested voltage value.

[0072] Please refer to Figure 4 , Figure 4The figure shows the current ripple curve generated when the charging device provides different output voltages as the input voltage of the boost circuit under the condition that the boosted output voltage remains fixed at 700V. The horizontal axis represents the output voltage provided by the charging device, that is, the boost input voltage of the boost circuit; the vertical axis Itotal-pp represents the peak value of the total charging current of each charging branch, that is, the current ripple peak value.

[0073] by Figure 4 In the current ripple curve shown, the current ripple curve with a motor angle of 0° is taken as an example. When the output voltage provided by the charging device is close to 230V or close to 470V, the peak value of the current ripple reaches the minimum. When the output voltage provided by the charging device is far away from 230V or far away from 470V, the peak value of the current ripple will gradually increase.

[0074] See further Figure 4 It can be seen that under different motor angles, such as the current ripple curves corresponding to motor angles of 7.5°, 21° or 46.25°, the change trend of the current ripple is basically the same. It can be concluded that even when the motor angle changes, when the output voltage of the charging device and the battery voltage meet the proportional relationship of the voltage regulation ratio, the peak value of the current ripple can be minimized.

[0075] according to Figure 4 From the current ripple curve shown, it can be concluded that when the voltage after boosting is kept constant, by adjusting the voltage before boosting so that the voltages before and after boosting satisfy a corresponding proportional relationship, the peak value of the current ripple can be effectively improved.

[0076] Based on the above current ripple curve, the corresponding relationship between the voltage before boosting and the voltage after boosting can be determined when the peak value of the current ripple reaches the minimum according to the corresponding relationship between the voltage before boosting and the current ripple, and the corresponding relationship is the voltage regulation ratio. For example, when the voltage after boosting is 700V, when the voltage before boosting is 230V or 470V, the corresponding current ripple peak is the minimum, and the voltage regulation ratio can be 230 / 700≈1 / 3, or can be 470 / 700≈2 / 3.

[0077] When the electric drive system realizes the boost charging function, the boost circuit formed by the motor and the motor controller can usually boost the output voltage of the charging device to the battery voltage of the battery. For example, the output voltage range of the charging device is usually 400V-500V. When the battery voltage of the battery is 700V, the boost circuit formed by the motor and the motor controller can boost the output voltage of the charging device to 700V; and when the battery voltage of the battery is 750V, the boost circuit formed by the motor and the motor controller can boost the output voltage of the charging device to 750V.

[0078] When the battery voltage is determined, according to the voltage adjustment ratio obtained from the current ripple curve, the product of the battery voltage and the voltage adjustment ratio can be used as the voltage value to be selected corresponding to the voltage adjustment ratio. For example, when the battery voltage of the battery is 750V, the battery voltage 750V is multiplied by each voltage adjustment ratio to obtain the voltage value to be selected corresponding to each voltage adjustment ratio.

[0079] In an optional embodiment, when the electric drive system boosts the output voltage of the charging device, the boosted voltage can usually be set to be slightly larger than the battery voltage of the battery. In combination with the above embodiment, after obtaining the battery voltage of the battery, the device can calculate a boosted voltage slightly larger than the battery voltage based on the battery voltage. For example, 1.1 to 1.3 times the battery voltage can be used as the boosted voltage, or the sum of the battery voltage and a fixed voltage value can be used as the boosted voltage, for example, the battery voltage is added to a voltage value between 20V-50V to obtain the boosted voltage. After obtaining the boosted voltage, the product of the boosted voltage and the voltage adjustment ratio can be calculated to obtain the corresponding requested voltage value.

[0080] As an optional embodiment, the voltage regulation ratio may include 1 / 3 and 2 / 3.

[0081] Taking the voltage adjustment ratios including 1 / 3 and 2 / 3 as an example, after determining the battery voltage of the battery, the battery voltage can be multiplied by the two voltage adjustment ratios to obtain two voltage values ​​to be selected. For example, when the battery voltage is 750V, the battery voltage can be multiplied by the two voltage adjustment ratios 1 / 3 and 2 / 3 to obtain two voltage values ​​to be selected, which are 250V and 500V.

[0082] In S220, after determining a plurality of voltage values ​​to be selected, the apparatus may obtain a range of charging voltages that can be provided by the charging device, and determine a requested voltage value from the plurality of voltage values ​​to be selected based on the charging voltage range.

[0083] As an optional implementation, after determining the charging voltage range, the device can determine a voltage value to be selected within the charging voltage range from multiple voltage values ​​to be selected as the requested voltage value. For example, when the battery voltage is 750V, the charging voltage range of the charging device can be obtained by multiplying the battery voltage by two voltage adjustment ratios to obtain two voltage values ​​to be selected, 250V and 500V. When the charging voltage range that the charging device can provide is 300V-500V, 500V can be selected from the two voltage values ​​to be selected as the requested voltage value.

[0084] In another embodiment, if there are two or more voltage values ​​to be selected that are all within the charging voltage range of the charging device, one of the multiple voltage values ​​to be selected that meet the conditions can be selected as the requested voltage value, or the voltage value to be selected with the largest voltage value can be selected from the multiple voltage values ​​to be selected that meet the conditions as the requested voltage value.

[0085] Please refer to Figure 5 As an optional embodiment, the above S220 may include:

[0086] S310, calculating the voltage ranges to be selected corresponding to the voltage values ​​to be selected, wherein the difference between each voltage value to be selected and any voltage value in the corresponding voltage range to be selected satisfies a preset error range;

[0087] S320, matching the charging voltage range of the charging device with each voltage range to be selected to obtain a requested voltage value; wherein the requested voltage value is within the overlap range between the charging voltage range and at least one voltage range to be selected.

[0088] In this embodiment, after determining each voltage value to be selected, the device can separately determine the voltage range to be selected for each voltage value to be selected. Within the voltage range to be selected, the difference between the output voltage provided by the charging device and the voltage value to be selected is small, and the ripple suppression of the common-mode current can also be achieved. After the device matches the charging voltage range of the charging device with each voltage range to be selected, it can select a suitable requested voltage value within the overlapping range of the charging voltage range and at least one voltage range to be selected. Within the overlapping range, the requested voltage value is the output voltage that the charging device can provide, and it can achieve the suppression of the current ripple of the common-mode current and reduce the magnetic loss and heat generation of the common-mode filter.

[0089] In S310, after the device determines each to-be-selected voltage value according to the product of the battery voltage and each voltage adjustment ratio, it can calculate the to-be-selected voltage range corresponding to each to-be-selected voltage value.

[0090] The voltage range to be selected corresponding to any of the above-mentioned voltage values ​​to be selected is composed of multiple voltage values ​​whose differences from the voltage value to be selected satisfy the preset error range. For example, taking the voltage value to be selected as 470V, if the preset error range is a percentage value of the voltage value to be selected, such as the preset error range is ±5%, then the voltage range to be selected corresponding to the voltage value to be selected is 446.5V-493.5V.

[0091] In another embodiment, the preset error range may also be a fixed value, such as ±20V. Then, when the voltage value to be selected is 470V, the corresponding voltage range to be selected is 450V-490V.

[0092] In S320, after determining the voltage ranges to be selected corresponding to the voltage values ​​to be selected, the charging voltage range of the charging device may be acquired, and the charging voltage range may be matched with the voltage ranges to be selected.

[0093] Taking the matching of the charging voltage range with multiple voltage ranges to be selected as an example, when the charging voltage range does not overlap with a certain voltage range to be selected, the voltage range to be selected can be directly discarded, and only the voltage range to be selected that at least partially overlaps with the charging voltage range is retained.

[0094] After selecting a voltage range that overlaps with the charging voltage range, multiple conventional output voltages that the charging device can output can be determined, and a conventional output voltage within the overlapping range can be selected as the requested voltage value. For example, when the voltage range to be selected is 450V-490V, and the conventional output voltage of the charging device within the range includes 470V, the conventional output voltage can be selected as the requested voltage value.

[0095] In the above embodiment, the voltage value that the charging device can provide within the charging voltage range is usually a plurality of discrete voltage values. At this time, the discrete voltage value within the overlapping range should be selected as the requested voltage value. In another embodiment, if the charging device can flexibly adjust the voltage within the charging voltage range, any voltage value within the overlapping range of the charging voltage range and the voltage range to be selected can be used as the requested voltage value. As an optional embodiment, the average voltage value of the overlapping range can be used as the requested voltage value.

[0096] In S130, after calculating the requested voltage value, the device can send a charging request including the requested voltage value to the charging device. After receiving the charging request, the charging device can adjust the output voltage to the requested voltage value. In the boost circuit formed by the motor, the motor controller and the boost module, the voltage before boosting is the output voltage of the requested voltage value provided by the charging device, and the voltage after boosting is the battery voltage. After determining the appropriate requested voltage value according to the battery voltage, by requesting the charging device to output the output voltage of the requested voltage value, the corresponding relationship between the voltage before boosting and the voltage after boosting can satisfy the coordinate relationship of the smaller current ripple in the current ripple curve, thereby reducing the common-mode current flowing through the common-mode magnetic ring, reducing the magnetic loss on the common-mode filter, and improving the heating problem of the common-mode filter under boost charging conditions.

[0097] As an optional embodiment, the first charging mode includes at least a pre-charging mode, and before S120, the following may also be included:

[0098] S410, in the pre-charging mode, comparing the battery voltage with a set voltage threshold;

[0099] S420, when the battery voltage is greater than a set voltage threshold, setting the voltage adjustment ratio to 1 / 3; wherein the set voltage threshold is associated with the maximum output voltage of the charging device;

[0100] S430: When the battery voltage is less than or equal to the set voltage threshold, the voltage adjustment ratio is set to 2 / 3.

[0101] In this embodiment, in the pre-charging mode, the device may compare the battery voltage with a set voltage threshold, which may be determined based on the maximum output voltage of the charging device. When the battery voltage is greater than the set voltage threshold, the charging device cannot provide the requested voltage value when the voltage adjustment ratio is set to 2 / 3, so the voltage adjustment ratio needs to be set to 1 / 3. Accordingly, when the battery voltage is less than or equal to the set voltage threshold, the charging device can provide the requested voltage value when the voltage adjustment ratio is set to 2 / 3, and the device may set the voltage adjustment ratio to 2 / 3.

[0102] In S410, the first charging mode with a smaller charging current includes at least a pre-charging mode, and in addition, the first charging mode may also include a constant voltage charging mode. In the pre-charging mode or the constant voltage charging mode, the device may compare the battery voltage with a preset voltage threshold.

[0103] The pre-charging mode means that before the electric drive system is boosted and charged, the voltage across the boost capacitor on the boost module is small. If the output voltage of the charging device is directly connected to the boost capacitor, the boost capacitor will generate a large instantaneous current during the boost process, which may cause damage to the device. Therefore, before connecting the charging device to the boost module, the motor and the motor controller can form a step-down circuit. After the battery voltage is stepped down, the boost capacitor on the boost module is pre-charged, so that the voltage at one end of the boost capacitor connected to the charging device is raised to a certain extent. After the boost capacitor is pre-charged, when the charging device is connected to the boost module, the boost amplitude of the boost capacitor is greatly reduced, which can effectively reduce the instantaneous current generated by the boost capacitor during the boost process, thereby protecting the entire current loop and improving the reliability and stability of the boost charging condition.

[0104] In the constant voltage charging mode, after the electric drive system boosts the output voltage of the charging device, it can output a relatively stable constant voltage, and continuously charge the battery through the constant voltage. The above-mentioned constant voltage charging mode usually occurs in the stage of heating the battery or when the battery's SOC (state of charge) is extremely high, for example, it can be a trickle charging stage when the SOC is about to reach 100%. In the battery heating stage and the trickle charging stage, the charging current is usually lower than the constant current charging stage. Therefore, in the constant voltage charging mode, the battery voltage of the battery changes less, and the battery voltage can be regarded as stable within a certain time interval. At this time, the requested voltage value can be determined based on the battery voltage. Since the output voltage of the charging device and the battery voltage are both relatively stable, when the corresponding relationship between the two satisfies the smaller peak value of the current ripple, the magnetic loss on the common mode filter can be effectively suppressed, thereby improving the heating problem of the common mode filter.

[0105] In S420, after comparing the battery voltage with the set voltage threshold, if the battery voltage is greater than the set voltage threshold, the device may set the voltage adjustment ratio to 1 / 3, and in the subsequent calculation of the requested voltage value, 1 / 3 is used as the product of the voltage adjustment ratio and the battery voltage.

[0106] When the charging device is connected to the charging port, the device can obtain the maximum output voltage that the charging device can provide, and calculate the corresponding set voltage threshold based on the maximum output voltage. If the battery voltage is greater than the set voltage threshold, then after calculating the requested voltage value with 2 / 3 as the voltage adjustment ratio, the requested voltage value will exceed the maximum output voltage that the charging device can provide. That is, the charging device cannot provide the output voltage of the requested voltage value at this time, so the voltage adjustment ratio needs to be set to 1 / 3.

[0107] The above-mentioned set voltage threshold value may be associated with the maximum output voltage that the charging device can provide. As an optional embodiment, the set voltage threshold value may be set to 1.5 times the maximum stable output voltage that the charging device can provide. Taking the charging device as a charging pile as an example, when there are differences in the types or parameters of the charging piles, the maximum output voltages that different charging piles can provide are different. For example, the maximum output voltage that some charging piles can provide does not exceed 450V, while another part of the charging piles can provide an output voltage of more than 500V. Therefore, different set voltage threshold values ​​may be set for charging devices with different maximum output voltages. When the maximum stable output voltage of the charging pile is 450V, the set voltage threshold value may be set to 675V. When the battery voltage is higher than 675V, for example, when the battery voltage is 700V, if the voltage regulation ratio is 2 / 3, then 700*(2 / 3)=466.7>450, and the charging pile cannot stably provide an output voltage of 466.7V. Therefore, when the battery voltage is higher than the set voltage threshold value, the voltage regulation ratio needs to be set to 1 / 3.

[0108] In S430, if the battery voltage is less than or equal to the set voltage threshold, the device may set the voltage adjustment ratio to 2 / 3, and in the subsequent calculation of the requested voltage value, 2 / 3 is used as the product of the voltage adjustment ratio and the battery voltage.

[0109] As an optional implementation, when the battery voltage is less than or equal to the set voltage threshold, 1 / 3 may be used as the voltage adjustment ratio. For example, when the maximum output voltage that the charging device can provide is higher than the product of the battery voltage and 2 / 3, and the minimum output voltage is lower than the product of the battery voltage and 1 / 3, the device may set the voltage adjustment ratio to either 1 / 3 or 2 / 3.

[0110] Taking the above charging pile with a maximum stable output voltage of 450V and a set voltage threshold of 675V as an example, when the battery voltage is less than 675V, for example, when the battery voltage is 650V, since the charging pile is usually a 400V charging pile, the voltage adjustment ratio is 1 / 3 corresponding to 216.6V, and the voltage adjustment ratio is 2 / 3 corresponding to 433.3V. From the two voltage values ​​to be selected, 433.3V, which is closer to 400V, can be selected as the requested voltage value. That is, when the battery voltage is less than or equal to the set voltage threshold, the voltage adjustment ratio selects 2 / 3.

[0111] In another optional implementation, various types of charging devices that can be supported by the electric drive system can also be obtained, and the charging device with the smallest maximum output voltage among the various charging devices can be determined. The set voltage threshold set for the maximum output voltage of the charging device can meet the needs of other charging devices. For example, when the battery voltage is less than the set voltage threshold, it can be determined that among multiple charging devices, the charging device that can provide the smallest maximum output voltage can also meet the requested voltage value when the voltage regulation ratio is set to 2 / 3, then other charging devices must also be able to provide an output voltage of the corresponding requested voltage value. At this time, the same set voltage threshold can also be used for different charging devices.

[0112] As an optional embodiment, the charging control method of the electric drive system may further include:

[0113] S510, in a second charging mode, setting a minimum value of the charging current to a second current threshold; wherein the second current threshold is greater than or equal to a saturation current value of the common mode filter.

[0114] In this embodiment, the boost charging condition of the electric drive system may further include a second charging mode. The charging current in the second charging mode is greater than the charging current in the first charging mode. For example, the second charging mode may be a constant current charging mode.

[0115] The constant current charging mode refers to the boost charging stage in which the charging current maintains a relatively stable constant current when the battery is boosted and charged. The charging power in the above constant current charging mode is relatively high, and usually occurs in the charging stage when the battery's SOC is low. For example, the fast charging stage from 20% to 80% SOC is usually a constant current charging mode.

[0116] In constant current charging mode, the SOC of the battery increases rapidly, and accordingly the battery voltage also rises rapidly. Therefore, in constant current charging mode, the battery voltage of the battery is not stable, but will continue to rise. In constant current charging mode, if the charging device is continuously requested to provide an output voltage of the requested voltage value according to the real-time battery voltage of the battery, the charging efficiency will be seriously affected. Therefore, when the charging current is high, it is impossible to reduce the magnetic loss of the common mode magnetic ring by calculating the requested voltage value.

[0117] However, when the charging current is high, it will usually exceed the saturation current value of the common mode filter, causing the common mode filter to be in a saturated state. In this saturated state, even if the current directions of each phase in the three-phase circuit are consistent, no large magnetic loss will be generated, let alone overheating.

[0118] The device can predetermine the saturation current value of the common-mode filter according to the device parameters of the common-mode filter, and set the second current threshold value according to the saturation current value. Among them, the second current threshold value should be greater than or equal to the saturation current value. In the second charging mode, the device can set the minimum value of the charging current to the second current threshold value. It can be understood that since the second current threshold value is greater than or equal to the saturation current value, the charging current will always be greater than the saturation current value, so that the common-mode filter is maintained in a saturated state. The magnetic loss and heat generated by the common-mode filter in the saturated state are greatly reduced, thereby effectively improving the problem of the electric drive system being prone to heat in the boost charging mode when the charging current is large.

[0119] As an optional embodiment, the electric drive system includes a motor controller and a motor, the motor controller includes three bridge arm groups, the motor includes three winding inductors corresponding to the three bridge arm groups, and each bridge arm group and the corresponding winding inductor form a charging branch. The charging control method of the electric drive system may also include:

[0120] S610, in a first charging mode, providing a first boost control signal, a second boost control signal and a third boost control signal to three charging branches respectively; wherein the phases of any two of the first boost control signal, the second boost control signal and the third boost control signal are inconsistent.

[0121] In this embodiment, the electric drive system includes a motor and a motor controller. The motor controller includes three bridge arm groups, each bridge arm group includes an upper bridge arm and a lower bridge arm, and the motor includes three winding inductors corresponding to the three bridge arm groups.

[0122] The upper bridge arm and the lower bridge arm may be power semiconductor switch devices including body diodes. Each bridge arm group may form a charging branch with the corresponding winding inductor, and the charging branch may realize a boost in the output voltage of the charging device.

[0123] As an optional implementation, the most basic boost circuit is composed of an inductor, a diode and a switch tube. Taking a single charging branch as an example, the winding inductor can be used as the inductor in the boost circuit, the power semiconductor switch device of the upper bridge arm can remain in the disconnected state, and the body diode can be used as the diode in the boost circuit, and the power semiconductor switch device of the lower bridge arm can be used as the switch tube. Therefore, each bridge arm group and its corresponding winding inductor can form a charging branch that can realize the boost function.

[0124] In the first charging mode, the first boost control signal, the second boost control signal and the third boost control signal can be provided to the three charging branches respectively to realize the boost control of the three charging branches. It can be understood that the first boost control signal, the second boost control signal and the third boost control signal are respectively used to control the power semiconductor switch devices of the lower bridge arms of the three branches.

[0125] Please refer to Figure 6 , Figure 6 The current waveforms corresponding to the three charging branches are shown. Figure 6 The horizontal axis represents the time period, and the vertical axis represents the current size, where Iu, Iv and Iw are the current waveforms of the three charging branches respectively, and Isum is the total current waveform after the three current waveforms are superimposed. Figure 6 As shown, when a suitable output voltage is not requested from the charging device according to the battery voltage, the current ripple of the total current generated by the three charging branches is large, which easily causes magnetic loss and heating of the magnetic ring of the filter.

[0126] In order to reduce the magnetic loss on the common-mode filter, the current changes of each charging branch should be staggered as much as possible to avoid excessive current in the same direction at the same time. The device adjusts the signal phases of the first boost control signal, the second boost control signal and the third boost control signal so that the signal phases of any two boost control signals are inconsistent, which can avoid the two charging branches reaching the maximum current at the same time and superimposing, that is, avoid the total common-mode current obtained by superimposing the three charging branches from being too large.

[0127] As an optional embodiment, a phase difference of one of the second boost control signal and the third boost control signal with the first boost control signal is 120°, and a phase difference of the other of the second boost control signal and the first boost control signal is -120°.

[0128] In order to minimize the peak value of the total common-mode current obtained by superimposing the three charging branches, the second boost control signal and the third boost control signal can be set to have a phase difference of 120° with the first boost control signal, and the other can be set to have a phase difference of -120° with the first boost control signal, that is, the charging currents Iu, Iv, and Iw corresponding to the three charging branches are out of phase by 120° in sequence. Figure 7 As shown, when the charging currents Iu, Iv, and Iw are out of phase by 120° in sequence, Isum is the superimposed waveform of the three charging currents. At this time, the superimposed ripple of the total common-mode current is the smallest, and the magnetic loss of the common-mode filter is also the smallest.

[0129] The present application also provides a charging control device for an electric drive system, such as Figure 8 As shown, the charging control device of the electric drive system includes:

[0130] The acquisition module 801 is used to acquire the battery voltage of the battery when the charging device is connected to the charging port;

[0131] The calculation module 802 is used to calculate the product of the battery voltage and the voltage regulation ratio in the first charging mode to obtain a requested voltage value corresponding to the voltage regulation ratio; wherein the first charging mode includes a charging mode in which the charging current is less than a first current threshold;

[0132] The request module 803 is configured to send a charging request including a requested voltage value to the charging device, so that the charging device provides an output voltage of the requested voltage value.

[0133] It should be noted that the charging control device of the electric drive system is a device corresponding to the charging control method of the electric drive system mentioned above, and all implementation methods in the above method embodiments are applicable to the embodiments of the device and can achieve the same technical effects.

[0134] Fig. 9 A schematic diagram of the hardware structure of a charging control device for an electric drive system provided in an embodiment of the present application is shown.

[0135] The charging control device of the electric drive system may include a processor 901 and a memory 902 storing computer program instructions.

[0136] Specifically, the processor 901 may include a central processing unit (CPU), or an application specific integrated circuit (ASIC), or may be configured to implement one or more integrated circuits of the embodiments of the present application.

[0137] The memory 902 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 902 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 902 may include a removable or non-removable (or fixed) medium. Where appropriate, the memory 902 may be inside or outside a charging control device of an electric drive system. In a particular embodiment, the memory 902 is a non-volatile solid-state memory.

[0138] In certain embodiments, the memory 902 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage media device, an optical storage media device, a flash memory device, an electrical, optical or other physical / tangible memory storage device. Thus, in general, the memory includes one or more tangible (non-transitory) computer-readable storage media (e.g., a memory device) encoded with software including computer-executable instructions, and when the software is executed (e.g., by one or more processors), it is operable to perform the operations described with reference to the method according to an aspect of the present disclosure.

[0139] The processor 901 implements any one of the charging control methods for the electric drive system in the above embodiments by reading and executing computer program instructions stored in the memory 902 .

[0140] In one example, the charging control device of the electric drive system may further include a communication interface 903 and a bus 910. Fig. 9 As shown, the processor 901, the memory 902, and the communication interface 903 are connected via a bus 910 and communicate with each other.

[0141] The communication interface 903 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0142] The bus 910 includes hardware, software or both, coupling the components of the charging control device of the electric drive system to each other. For example and not limitation, the bus may include an accelerated graphics port (AGP) or other graphics bus, an enhanced industrial standard architecture (EISA) bus, a front-end bus (FSB), a hypertransport (HT) interconnect, an industrial standard architecture (ISA) bus, an infinite bandwidth interconnect, a low pin count (LPC) bus, a memory bus, a microchannel architecture (MCA) bus, a peripheral component interconnect (PCI) bus, a PCI-Express (PCI-X) bus, a serial advanced technology attachment (SATA) bus, a video electronics standard association local (VLB) bus or other suitable bus or a combination of two or more of these. Where appropriate, the bus 910 may include one or more buses. Although the embodiments of the present application describe and illustrate a specific bus, the present application considers any suitable bus or interconnect.

[0143] In addition, in combination with the charging control method of the electric drive system in the above embodiments, the embodiment of the present application can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by the processor, any one of the charging control methods of the electric drive system in the above embodiments is implemented.

[0144] An embodiment of the present application also provides a vehicle, which may include at least one of the above-mentioned charging control device of the electric drive system, the charging control equipment of the electric drive system, or a computer-readable storage medium.

[0145] It should be clear that the present application is not limited to the specific configuration and processing described above and shown in the figures. For the sake of simplicity, a detailed description of the known method is omitted here. In the above embodiments, several specific steps are described and shown as examples. However, the method process of the present application is not limited to the specific steps described and shown, and those skilled in the art can make various changes, modifications and additions, or change the order between the steps after understanding the spirit of the present application.

[0146] The functional blocks shown in the above block diagram can be implemented as hardware, software, firmware or a combination thereof. When implemented in hardware, it can be, for example, an electronic circuit, an application specific integrated circuit (ASIC), appropriate firmware, a plug-in, a function card, etc. When implemented in software, the elements of the present application are programs or code segments that are used to perform the required tasks. The program or code segment can be stored in a machine-readable medium, or transmitted on a transmission medium or a communication link by a data signal carried in a carrier wave. "Machine-readable medium" can include any medium capable of storing or transmitting information. Examples of machine-readable media include electronic circuits, semiconductor memory devices, ROM, flash memory, erasable ROM (EROM), floppy disks, CD-ROMs, optical disks, hard disks, optical fiber media, radio frequency (RF) links, etc. The code segment can be downloaded via a computer network such as the Internet, an intranet, etc.

[0147] It should also be noted that the exemplary embodiments mentioned in this application describe some methods or systems based on a series of steps or devices. However, this application is not limited to the order of the above steps, that is, the steps can be performed in the order mentioned in the embodiment, or in a different order from the embodiment, or several steps can be performed simultaneously.

[0148] Aspects of the present disclosure are described above with reference to the flowchart and / or block diagram of the method, device (system) and computer program product according to the embodiment of the present disclosure. It should be understood that each box in the flowchart and / or block diagram and the combination of each box in the flowchart and / or block diagram can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device to produce a machine so that these instructions executed by the processor of the computer or other programmable data processing device enable the implementation of the function / action specified in one or more boxes of the flowchart and / or block diagram. Such a processor can be, but is not limited to, a general-purpose processor, a special-purpose processor, a special application processor, or a field programmable logic circuit. It can also be understood that each box in the block diagram and / or flowchart and the combination of boxes in the block diagram and / or flowchart can also be implemented by dedicated hardware that performs a specified function or action, or can be implemented by a combination of dedicated hardware and computer instructions.

[0149] The above are only specific implementation methods of the present application. Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working processes of the systems, modules and units described above can refer to the corresponding processes in the aforementioned method embodiments, and will not be repeated here. It should be understood that the protection scope of the present application is not limited to this. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in this application, and these modifications or replacements should be included in the protection scope of this application.

Claims

1. A charging control method for an electric drive system, It is characterized in that The electric drive system includes a common mode filter; and the charging control method of the electric drive system includes: When the charging device is connected to the charging port, the battery voltage of the battery is obtained; In a first charging mode, calculating the product of the battery voltage and the voltage regulation ratio to obtain a requested voltage value corresponding to the voltage regulation ratio; wherein the first charging mode includes a charging mode in which the charging current is less than a first current threshold; A charging request including the requested voltage value is sent to the charging device, so that the charging device provides an output voltage of the requested voltage value.

2. The charging control method of the electric drive system according to claim 1, It is characterized in that The calculating the product of the battery voltage and the voltage regulation ratio to obtain a requested voltage value corresponding to the voltage regulation ratio includes: Calculating the product of the battery voltage and at least two voltage adjustment ratios to obtain voltage values ​​to be selected corresponding to the voltage adjustment ratios; Based on the charging voltage range of the charging device, a requested voltage value is determined from the voltage values ​​to be selected.

3. The charging control method of the electric drive system according to claim 2, It is characterized in that The step of determining the requested voltage value from each of the voltage values ​​to be selected based on the charging voltage range of the charging device includes: Calculating the voltage ranges to be selected corresponding to the voltage values ​​to be selected, wherein the difference between each voltage value to be selected and any voltage value in the corresponding voltage range to be selected satisfies a preset error range; The charging voltage range of the charging device is matched with each of the voltage ranges to be selected to obtain a requested voltage value; wherein the requested voltage value is within the overlapping range of the charging voltage range and at least one of the voltage ranges to be selected.

4. The charging control method of the electric drive system according to claim 2, It is characterized in that The voltage regulation ratio includes 1 / 3 and 2 / 3.

5. The charging control method of the electric drive system according to any one of claims 1 to 4, It is characterized in that The first charging mode at least includes a pre-charging mode; in the first charging mode, before calculating the product of the battery voltage and the voltage adjustment ratio to obtain the requested voltage value corresponding to the voltage adjustment ratio, the method further includes: In the pre-charging mode, comparing the battery voltage with a set voltage threshold; When the battery voltage is greater than a set voltage threshold, the voltage adjustment ratio is set to 1 / 3; wherein the set voltage threshold is associated with the maximum output voltage of the charging device; When the battery voltage is less than or equal to the set voltage threshold, the voltage regulation ratio is set to 2 / 3.

6. The charging control method of the electric drive system according to any one of claims 1 to 4, It is characterized in that The charging control method of the electric drive system further includes: In the second charging mode, the minimum value of the charging current is set as a second current threshold; wherein the second current threshold is greater than or equal to a saturation current value of the common mode filter.

7. The charging control method of the electric drive system according to any one of claims 1 to 4, It is characterized in that The electric drive system includes a motor controller and a motor, the motor controller includes three bridge arm groups, the motor includes three winding inductors corresponding to the three bridge arm groups, each bridge arm group and the corresponding winding inductor form a charging branch; The charging control method of the electric drive system further includes: In the first charging mode, a first boost control signal, a second boost control signal and a third boost control signal are respectively provided to the three charging branches; wherein the phases of any two of the first boost control signal, the second boost control signal and the third boost control signal are inconsistent.

8. The charging control method of the electric drive system according to claim 7, It is characterized in that The phase difference between one of the second boost control signal and the third boost control signal and the first boost control signal is 120°, and the phase difference between the other of the second boost control signal and the first boost control signal is -120°.

9. A charging control device for an electric drive system, It is characterized in that The charging control device of the electric drive system comprises: An acquisition module, used for acquiring a battery voltage of a battery when a charging device is connected to a charging port; A calculation module, configured to calculate, in a first charging mode, a product of the battery voltage and the voltage adjustment ratio to obtain a requested voltage value corresponding to the voltage adjustment ratio; wherein the first charging mode includes a charging mode in which a charging current is less than a first current threshold; The request module is used to send a charging request including the requested voltage value to the charging device, so that the charging device provides an output voltage of the requested voltage value.

10. A charging control device for an electric drive system, It is characterized in that The charging control device of the electric drive system includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the charging control method of the electric drive system according to any one of claims 1 to 8 is implemented.

11. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the charging control method for the electric drive system according to any one of claims 1 to 8 is implemented.

12. A vehicle, It is characterized in that The vehicle comprises at least one of the following: The charging control device of the electric drive system according to claim 9; The charging control device of the electric drive system according to claim 10; The computer readable storage medium of claim 11.

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