Power battery charging method, medium, device, and vehicle

Abstract

The present disclosure relates to a power battery charging method, medium, device and vehicle. The method comprises: in the case that the power battery is simultaneously charged by at least two direct current charging circuits, determining the maximum allowable charging current of the power battery and the current maximum allowable charging current of the power battery; and determining the current distribution strategy of the at least two direct current charging circuits according to the maximum allowable charging current of the power battery and the current maximum allowable charging current of the power battery. The current distribution strategy of the at least two direct current charging circuits corresponds to the maximum allowable charging current of the power battery, so that the current distribution of the at least two direct current charging circuits is more reasonable.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the field of vehicle charging control, in particular, to a power battery charging method, medium, device and vehicle. BACKGROUND

[0002] With the rapid development of new energy vehicles, the market share of electric vehicles is increasing year by year, and the range anxiety is a common problem of new energy vehicles. Some electric vehicles are equipped with a double-gun direct current charging circuit to solve the problem of insufficient output voltage and power of the direct current charging device. Since the two charging circuits of the double-gun charging can be independently controlled, how to reasonably distribute the current becomes a problem to be solved for double-gun direct current charging vehicles. SUMMARY

[0003] The purpose of the present disclosure is to provide a power battery charging method, medium, device and vehicle, which can reasonably distribute the current of the double-gun direct current charging circuit.

[0004] To achieve the above purpose, the present disclosure provides a power battery charging method, which comprises:

[0005] In the case that the power battery is simultaneously charged by at least two direct current charging circuits, the current of the power battery is determined.

[0006] According to the current maximum allowable charging current of the power battery, the current distribution strategy of the at least two direct current charging circuits is determined.

[0007] Optionally, the current distribution strategy of the at least two direct current charging circuits is determined according to the current maximum allowable charging current of the power battery, comprising:

[0008] According to the size comparison result of the current maximum allowable charging current of the power battery and the current threshold value, the current distribution strategy of the at least two direct current charging circuits is determined.

[0009] Optionally, in the case that the power battery is simultaneously charged by two direct current charging circuits, the two direct current charging circuits comprise a first direct current charging circuit and a second direct current charging circuit, the first direct current charging circuit is a boost charging circuit, and the second direct current charging circuit is a direct charging circuit.

[0010] Optionally, the current distribution strategy of the at least two direct current charging circuits is determined according to the size comparison result of the current maximum allowable charging current of the power battery and the current threshold value, comprising:

[0011] determining the target current in the second direct current charging circuit as half of the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger, and determining the target current in the first direct current charging circuit as the difference between the current maximum allowed charging current of the power battery and the current in the second direct current charging circuit and the output current of the direct current side of the on-board charger when the current maximum allowed charging current of the power battery is less than or equal to the first current threshold value;

[0012] determining the target current in the second direct current charging circuit as the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger and the first reserved value, and determining the smaller one of the following two as the target current in the first direct current charging circuit when the current maximum allowed charging current of the power battery is greater than the first current threshold value:

[0013] the maximum allowed current of the boost-buck module in the first direct current charging circuit; and

[0014] the difference between the current maximum allowed charging current of the power battery and the current in the second direct current charging circuit and the output current of the direct current side of the on-board charger.

[0015] Optionally, the method further comprises:

[0016] determining the smaller one of the following two as the target current in the first direct current charging circuit when the power battery is directly charged by the first direct current charging circuit only:

[0017] the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger; and

[0018] the maximum allowed current of the boost-buck module in the first direct current charging circuit;

[0019] determining the target current in the second direct current charging circuit as the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger when the power battery is directly charged by the second direct current charging circuit only.

[0020] Optionally, the method further comprises:

[0021] terminating the charging of the first direct current charging circuit if it is determined that the power battery reaches high power and it is determined that the maximum output current of the charging pile connected with the second direct current charging circuit can meet the current charging of the power battery.

[0022] Optionally, the at least two direct current charging loops include a third direct current charging loop and a fourth direct current charging loop, and the third direct current charging loop and the fourth direct current charging loop are both direct charging loops.

[0023] Optionally, the determining of the current distribution strategy of the at least two direct current charging loops according to the comparison result of the current maximum allowed charging current of the power battery and the size of the current threshold value comprises:

[0024] When the current maximum allowed charging current of the power battery is less than or equal to a second current threshold value, the target current in the fourth direct current charging loop is determined as half of the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger, and the target current in the third direct current charging loop is determined as the difference between the current maximum allowed charging current of the power battery and the current in the fourth direct current charging loop and the output current of the direct current side of the on-board charger.

[0025] When the current maximum allowed charging current of the power battery is greater than the second current threshold value, the smaller of the following two values is determined as the target current in the fourth direct current charging loop:

[0026] the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger and a second reserved value; and

[0027] the maximum charging current in the fourth direct current charging loop.

[0028] When the current maximum allowed charging current of the power battery is greater than the second current threshold value, the smaller of the following two values is determined as the target current in the third direct current charging loop:

[0029] the difference between the current maximum allowed charging current of the power battery and the current in the fourth direct current charging loop and the output current of the direct current side of the on-board charger; and

[0030] the maximum charging current in the third direct current charging loop.

[0031] Optionally, the method further comprises:

[0032] When the power battery is directly charged only by the third direct current charging loop, the smaller of the following two values is determined as the target current in the third direct current charging loop:

[0033] the difference between the current maximum allowed charging current of the power battery and the output current of the direct current side of the on-board charger; and

[0034] the maximum charging current of the third direct current charging loop.

[0035] Optionally, the method further comprises:

[0036] If it is determined that the power battery reaches high power and it is determined that the maximum output current of the charging pile connected by the fourth direct current charging loop can meet the current charging of the power battery, the charging of the third direct current charging loop is terminated.

[0037] The present disclosure also provides a non-transitory computer readable storage medium having a computer program stored thereon, which, when executed by a processor, implements the steps of the above method provided by the present disclosure.

[0038] The present disclosure also provides an electronic device comprising:

[0039] a memory having a computer program stored thereon;

[0040] a processor configured to execute the computer program in the memory to implement the steps of the above method provided by the present disclosure.

[0041] The present disclosure also provides a vehicle comprising a power battery and the above electronic device provided by the present disclosure.

[0042] Through the above technical solution, in the case that the power battery is simultaneously charged by at least two direct current charging loops, the current distribution strategy of the at least two direct current charging loops is determined according to the current maximum allowable charging current of the power battery. Since the maximum allowable charging current of the power battery is related to the voltage of the single battery, the temperature of the power battery and the remaining power of the power battery, it reflects the current charging state of the power battery, therefore, the current distribution strategy of the at least two direct current charging loops corresponds to the maximum allowable charging current of the power battery, so that the current distribution of the at least two direct current charging loops is more reasonable.

[0043] Other features and advantages of the present disclosure will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0044] The accompanying drawings are included to provide a further understanding of the present disclosure and constitute a part of the specification, which together with the following detailed description, serve to explain the present disclosure. In the drawings:

[0045] Figure 1 is a flowchart of a power battery charging method provided by an exemplary embodiment.

[0046] Figure 2 is a schematic diagram of two direct current charging loops provided by an exemplary embodiment.

[0047] Figure 3 is Figure 2a schematic diagram of two DC charging circuits and an AC charging circuit.

[0048] Figure 4 a schematic diagram of two DC charging circuits provided by another exemplary embodiment.

[0049] Figure 5 is Figure 4 a schematic diagram of two DC charging circuits and an AC charging circuit. DETAILED DESCRIPTION

[0050] The specific embodiments of the present disclosure will be described below in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are merely intended to illustrate and explain the present disclosure, and are not intended to limit the present disclosure.

[0051] Figure 1 is a flow chart of a power battery charging method provided by an exemplary embodiment. As shown in the figure, the method can include the following steps: Figure 1

[0052] Step S101, in the case that the power battery is simultaneously charged by at least two DC charging circuits, determining the current maximum allowed charging current of the power battery.

[0053] Step S102, according to the current maximum allowed charging current of the power battery, determining the current distribution strategy of the at least two DC charging circuits.

[0054] The maximum allowed charging current of the power battery represents the maximum value of the current allowed to flow in when the power battery is charging, which is related to the voltage of the single battery, the temperature of the power battery and the remaining capacity of the power battery. During the process of charging the power battery, the voltage of the single battery, the temperature of the power battery and the remaining capacity of the power battery will change, therefore, the maximum allowed charging current of the power battery is also real-time changing. For example, the current corresponding to the current voltage of the single battery, the current temperature of the power battery and the current remaining capacity of the power battery can be found in the corresponding relationship by table lookup, as the determined current maximum allowed charging current of the power battery. The current maximum allowed charging current of the power battery can be determined periodically.

[0055] Since the power battery is simultaneously charged by at least two DC charging circuits, the current flowing into the power battery is the sum of the currents of these DC charging circuits. The current distribution strategy of the at least two DC charging circuits includes how to determine the current of each DC charging circuit.

[0056] For example, the current distribution strategy of the at least two DC charging circuits can be determined according to the current interval in which the current maximum allowed charging current of the power battery is located. A plurality of current intervals can be set in advance, and each current interval corresponds to a different current distribution strategy.​

[0057] Since the maximum allowed charging current of the power battery is related to the voltage of the single battery, the temperature of the power battery and the remaining power of the power battery, which reflects the current charging state of the power battery, the current distribution strategy of the at least two direct current charging loops corresponds to the maximum allowed charging current of the power battery, so that the current distribution of the at least two direct current charging loops is more reasonable.

[0058] In yet another embodiment, the current distribution strategy of the at least two direct current charging loops is determined according to the current maximum allowed charging current of the power battery, comprising: determining the current distribution strategy of the at least two direct current charging loops according to the comparison result of the current maximum allowed charging current of the power battery and the current threshold.

[0059] The current distribution strategy can include two kinds, corresponding to the two cases that the comparison result is less than or equal to and greater than. That is, when the current maximum allowed charging current of the power battery is less than or equal to the current threshold, a kind of current distribution strategy is adopted, and when the current maximum allowed charging current of the power battery is greater than the current threshold, another kind of current distribution strategy is adopted. The current threshold can be set according to test or experience, so that there is a relatively obvious difference in the charging state when the current maximum allowed charging current of the power battery is greater than and less than the current threshold, so as to be suitable for the respective corresponding current distribution strategy.

[0060] In this embodiment, by simply comparing the current maximum allowed charging current of the power battery with the current threshold, the corresponding current distribution strategy is determined, and the implementation method is simple and fast in processing speed.

[0061] In yet another embodiment, in the case that the power battery is simultaneously charged by two direct current charging loops, the two direct current charging loops can include a first direct current charging loop and a second direct current charging loop. The first direct current charging loop is a boost charging loop, and the second direct current charging loop is a direct charging loop.

[0062] Figure 2 is a schematic diagram of the two direct current charging loops provided by an exemplary embodiment. As shown in Figure 2 The first direct current charging loop is provided with a first direct current charging port, a first switch K1, a second switch K2 and a boost-buck module. The first direct current charging port is connected to the power battery through the first switch K1, the second switch K2 and the boost-buck module in sequence. The second direct current charging loop is provided with a second direct current charging port, a third switch K3 and a fourth switch K4. The second direct current charging port is connected to the power battery through the third switch K3 and the fourth switch K4.

[0063] As shown in Figure 2As shown, the controller is connected (dashed line connection) with the first direct current charging port, the first switch K1, the second switch K2, the second direct current charging port, the third switch K3 and the fourth switch K4, respectively. The controller can be a vehicle-mounted controller integrated with direct current charging function, and can include one or more vehicle-mounted controllers. The controller can contain two groups of independent direct current charging control guide circuits, which interact with the charging pile through the charging sub-network to perform CAN signal interaction to control each stage of direct current charging and control the direct current charging switches (for example, the first switch K1, the second switch K2, the third switch K3 and the fourth switch K4) in the direct current charging loop. The controller can be, for example, a battery management system (BMS), and if it is another vehicle-mounted controller, it can interact with the battery management system, such as direct current charging gun connection signal, direct current charging permission signal, maximum allowed charging current, etc. The battery management system can monitor the cell state of the power battery (such as single cell voltage, temperature, maximum allowed charging current, etc.) and perform state of charge (SOC) calculation during direct current charging. The controller can also interact with the voltage-lifting module, such as voltage-lifting module working command, voltage-lifting module target voltage and current value, etc. After receiving the working command and working target voltage and current value, the voltage-lifting module controls the output of the corresponding voltage and current value and feeds back its own state.

[0064] In addition to direct current charging, the electric vehicle can also have alternating current charging function. Figure 3 is Figure 2 a schematic diagram of two direct current charging loops and an alternating current charging loop. As Figure 3 shown, the alternating current charging port is connected to the power battery through the vehicle-mounted charger. The alternating current charging and the first direct current loop and the second direct current loop charging can be parallel.

[0065] In yet another embodiment, according to the comparison result of the current maximum allowed charging current of the power battery and the size of the current threshold, the current distribution strategy of the at least two direct current charging loops is determined, including:

[0066] When the current maximum allowed charging current of the power battery is less than or equal to the first current threshold, the target current in the second direct current charging loop is determined as half of the difference between the current maximum allowed charging current of the power battery and the direct current side output current of the vehicle-mounted charger, and the target current in the first direct current charging loop is determined as the difference between the current maximum allowed charging current of the power battery and the current in the second direct current charging loop and the direct current side output current of the vehicle-mounted charger.

[0067] The current threshold value can include a first current threshold value. The target current in the first direct current charging loop can be a requested current sent to the plug-in at the first direct current charging port. The target current in the second direct current charging loop can be a requested current sent to the plug-in at the second direct current charging port. The on-board charger includes an alternating current side and a direct current side. The alternating current input from the alternating current side is converted into direct current, which is output from the direct current side. The alternating current side of the on-board charger is connected to the alternating current charging port, and the direct current side of the on-board charger is connected to the power battery.

[0068] According to the above current distribution strategy, for example, when Ic≤60A:

[0069] Ic2=0.5(Ic-I obc ); Ic1=Ic-I2-I obc

[0070] wherein Ic is the current maximum allowable charging current of the power battery, 60A is the first current threshold value, Ic2 is the target current in the second direct current charging loop, Ic1 is the target current in the first direct current charging loop, I obc is the output current of the direct current side of the on-board charger, and I2 is the current in the second direct current charging loop.

[0071] When the current maximum allowable charging current of the power battery is greater than the first current threshold value, the target current in the second direct current charging loop is determined as the difference between the current maximum allowable charging current of the power battery and the output current of the direct current side of the on-board charger and the first reserved value, and the smaller value of the following two is determined as the target current in the first direct current charging loop:

[0072] the maximum allowable current of the boost-buck module in the first direct current charging loop; and

[0073] the difference between the current maximum allowable charging current of the power battery and the current in the second direct current charging loop and the output current of the direct current side of the on-board charger.

[0074] According to the above current distribution strategy, for example, when Ic>60A:

[0075] Ic2=Ic-I obc -P; Ic1=min(I buck , Ic-I2-I obc )

[0076] wherein P is the first reserved value, for example, 30A, I buck is the maximum allowable current of the boost-buck module, and min represents the minimum value.

[0077] The maximum allowed current of the boost-buck module represents a maximum value of the current that the boost-buck module can withstand, which is related to the selection of devices in the boost-buck module and can be a fixed value.

[0078] In this embodiment, two direct current charging circuits are used at the same time, the charging efficiency is increased, and the second direct current charging circuit (i.e., the direct charging circuit) is preferentially used for charging, thereby ensuring the safety of the boost-buck module.

[0079] In another embodiment, the method further comprises: in the case where the power battery is directly charged only by the first direct current charging circuit, determining the smaller value of the following two as the target current in the first direct current charging circuit:

[0080] The difference between the current maximum allowed charging current of the power battery and the direct current side output current of the on-board charger; and the maximum allowed current of the boost-buck module in the first direct current charging circuit.

[0081] According to the above current distribution strategy, when direct current charging is performed only by the first direct current charging circuit:

[0082] Ic1=min(Ic-I obc , I buck )

[0083] In the case where the power battery is directly charged only by the second direct current charging circuit, the target current in the second direct current charging circuit is determined as: the difference between the current maximum allowed charging current of the power battery and the direct current side output current of the on-board charger.

[0084] According to the above current distribution strategy, when direct current charging is performed only by the second direct current charging circuit:

[0085] Ic2=Ic-I obc

[0086] In this embodiment, in the case where only one direct current charging circuit is effective, the maximum allowed current is fully utilized, thereby ensuring the charging speed.

[0087] In another embodiment, the method further comprises: if it is determined that the power battery reaches a high power level and it is determined that the maximum output current of the charging pile connected to the second direct current charging circuit can satisfy the current charging of the power battery, terminating the charging of the first direct current charging circuit.

[0088] The power battery can be determined to reach a high power level when the SOC of the power battery is greater than a predetermined residual power threshold. The maximum output current of the charging pile connected to the second direct current charging circuit can be determined to be able to satisfy the current charging of the power battery when the maximum output current of the charging pile connected to the second direct current charging circuit is greater than the current maximum allowed charging current of the power battery.

[0089] For example, when the SOC of the power battery is greater than 95% and Iz2 is greater than or equal to 2Ic+20A, the charging of the first direct current charging circuit is terminated. Here, Iz2 is the maximum output current of the charging pile connected to the second direct current charging circuit, and 20A is a redundancy value.

[0090] After the charging of the first direct current charging circuit is terminated, the direct current charging is still performed through the second direct current charging circuit. In this way, the direct current charging of the boost-buck circuit can be actively terminated after the power battery reaches a high power, thereby increasing the service life of the boost-buck module.

[0091] After the charging of the first direct current charging circuit is terminated, a prompt message can also be output to prompt the user to unplug the charging gun of the first direct current charging circuit.

[0092] In yet another embodiment, the at least two direct current charging circuits include a third direct current charging circuit and a fourth direct current charging circuit, and the third direct current charging circuit and the fourth direct current charging circuit are both direct charging circuits. Figure 4 is a schematic diagram of two direct current charging circuits provided by another exemplary embodiment. As shown in Figure 4 , a third direct current charging port, a fifth switch K5, a sixth switch K6, and a boost-buck module are arranged in the third direct current charging circuit. The third direct current charging port is connected to the power battery through the fifth switch K5, the sixth switch K6, and the boost-buck module in sequence. A fourth direct current charging port, a seventh switch K7, an eighth switch K8, and a boost-buck module are arranged in the fourth direct current charging circuit. The fourth direct current charging port is connected to the power battery through the seventh switch K7, the eighth switch K8, and the boost-buck module in sequence. Figure 5 is a schematic diagram of two direct current charging circuits and an alternating current charging circuit of Figure 4 . As shown in Figure 5 , an alternating current charging port is connected to the power battery through an on-board charger. The alternating current charging can be parallel to the charging of the third direct current circuit and the fourth direct current circuit.

[0093] In yet another embodiment, corresponding to Figure 5 , according to a comparison result of the current maximum allowable charging current of the power battery and the current threshold value, a current distribution strategy of the at least two direct current charging circuits is determined, including:

[0094] When the current maximum allowable charging current of the power battery is less than or equal to the second current threshold value, the target current in the fourth direct current charging circuit is determined as half of the difference between the current maximum allowable charging current of the power battery and the output current of the direct current side of the on-board charger, and the target current in the third direct current charging circuit is determined as the difference between the current maximum allowable charging current of the power battery and the current in the fourth direct current charging circuit and the output current of the direct current side of the on-board charger.

[0095] The current threshold can include a second current threshold. The target current in the third DC charging circuit can be a requested current sent to the plug-in at the third DC charging port. The target current in the fourth DC charging circuit can be a requested current sent to the plug-in at the fourth DC charging port.

[0096] According to the above current distribution strategy, for example, when Ic≤120A:

[0097] Ic4=0.5(Ic-I obc );Ic3=Ic-I4-I obc

[0098] wherein 120A is the second current threshold, Ic4 is the target current in the fourth DC charging circuit, Ic3 is the target current in the third DC charging circuit, and I4 is the current in the fourth DC charging circuit.

[0099] When the current maximum allowable charging current of the power battery is greater than the second current threshold, the smaller of the following two is determined as the target current in the fourth DC charging circuit:

[0100] The difference between the current maximum allowable charging current of the power battery and the second reserved value and the output current of the on-board charger DC side; and the maximum charging current in the fourth DC charging circuit.

[0101] When the current maximum allowable charging current of the power battery is greater than the second current threshold, the smaller of the following two is determined as the target current in the third DC charging circuit:

[0102] The difference between the current maximum allowable charging current of the power battery and the current in the fourth DC charging circuit and the output current of the on-board charger DC side; and the maximum charging current in the third DC charging circuit.

[0103] According to the above current distribution strategy, for example, when Ic>120A:

[0104] Ic4= min(Ic-I obc -Q, Is4); Ic3= min(Ic-I4-I obc , Is3)

[0105] wherein Q is the second reserved value, for example, 60A, I buck is the maximum allowable current of the boost and buck module, min represents the minimum value, Is4 is the maximum charging current in the fourth DC charging circuit, and Is3 is the maximum charging current in the third DC charging circuit. Is4 and Is3 are related to the circuit selection design and can be fixed values.

[0106] It can be understood by those skilled in the art that the third direct current charging loop can be any one of the two direct charging loops.

[0107] In this embodiment, when two direct current charging loops are used at the same time, charging is preferentially performed by one of the two direct charging loops, and the maximum charging current in the direct charging loop is considered, so that the charging efficiency is increased while the safety of charging is ensured.

[0108] In yet another embodiment, the method further comprises: in the case where the power battery is directly charged by only the third direct current charging loop, determining the smaller value of the following two as the target current in the third direct current charging loop:

[0109] The difference between the current maximum allowable charging current of the power battery and the direct current side output current of the on-board charger; and the maximum charging current of the third direct current charging loop.

[0110] According to the above current distribution strategy, when direct current charging is performed by only the third direct current charging loop:

[0111] Ic3 = min (Ic - I obc , Is3)

[0112] It can be understood by those skilled in the art that the third direct current charging loop can be any one of the two direct charging loops. Therefore, when direct current charging is performed by only the fourth direct current charging loop:

[0113] Ic4 = min (Ic - I obc , Is4)

[0114] In this embodiment, a higher charging efficiency is ensured.

[0115] In yet another embodiment, the method further comprises: if it is determined that the power battery reaches a high power level and it is determined that the maximum output current of the charging pile connected to the fourth direct current charging loop can satisfy the current charging of the power battery, terminating the charging of the third direct current charging loop.

[0116] It can be determined that the power battery reaches a high power level when the SOC of the power battery is greater than a predetermined residual power threshold. It can be determined that the maximum output current of the charging pile connected to the fourth direct current charging loop can satisfy the current charging of the power battery when the maximum output current of the charging pile connected to the fourth direct current charging loop is greater than the current maximum allowable charging current of the power battery.

[0117] For example, when the SOC of the power battery is > 95% and Iz4 ≥ 2Ic + 20A, the charging of the third direct current charging loop is terminated. Wherein Iz4 is the maximum output current of the charging pile connected to the fourth direct current charging loop, and 20A is a redundancy value.

[0118] After the charging of the third DC charging circuit is terminated, the DC charging is still continued through the fourth DC charging circuit. In this way, the waste of public resources caused by continuous double-gun charging can be avoided.

[0119] After the charging of the third DC charging circuit is terminated, a prompt message can also be output to prompt the user to unplug the charging gun of the third DC charging circuit.

[0120] As understood by those skilled in the art, the third DC charging circuit can be any one of the two DC charging circuits, and the above method applied to the third DC charging circuit can also be applied to the fourth DC charging circuit. That is, if it is determined that the power battery reaches high power and it is determined that the maximum output current of the charging pile connected to the third DC charging circuit can meet the current charging of the power battery, the charging of the fourth DC charging circuit is terminated, and the DC charging is still continued through the third DC charging circuit.

[0121] The present disclosure also provides a non-transitory computer-readable storage medium having a computer program stored thereon, the program being executed by a processor to implement the steps of the above method.

[0122] The present disclosure also provides an electronic device, comprising:

[0123] a memory having a computer program stored thereon;

[0124] a processor configured to execute the computer program in the memory to implement the steps of the above method.

[0125] The present disclosure also provides a vehicle comprising a power battery and the above electronic device.

[0126] The preferred embodiments of the present disclosure are described in detail above with reference to the accompanying drawings, but the present disclosure is not limited to the specific details in the above embodiments. Within the technical concept of the present disclosure, various simple modifications can be made to the technical solutions of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

[0127] In addition, it should be noted that each specific technical feature described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, various possible combinations are not described again in the present disclosure.

[0128] In addition, various different embodiments of the present disclosure can also be combined in any appropriate manner, as long as they do not deviate from the idea of the present disclosure, and they should also be considered as disclosed by the present disclosure.

Claims

1. A method of charging a power cell, characterized by, The method comprises: In the case that the power battery is simultaneously charged by at least two direct-current charging circuits, determining the current maximum allowed charging current of the power battery; According to the comparison result of the current maximum allowed charging current of the power battery and the current threshold, determining the current distribution strategy of the at least two direct-current charging circuits; In the case that the power battery is simultaneously charged by two direct-current charging circuits, the two direct-current charging circuits comprise a first direct-current charging circuit and a second direct-current charging circuit, the first direct-current charging circuit is a boost charging circuit, and the second direct-current charging circuit is a direct charging circuit; The method further comprises: In the case that the power battery is only charged by the first direct-current charging circuit, determining the target current in the first direct-current charging circuit as the smaller one of the difference between the current maximum allowed charging current of the power battery and the output current of the on-board charger on the direct-current side and the maximum allowed current of the boost-buck module in the first direct-current charging circuit. In the case that the power battery is only charged by the second direct-current charging circuit, determining the target current in the second direct-current charging circuit as the difference between the current maximum allowed charging current of the power battery and the output current of the on-board charger on the direct-current side. The method further comprises: If it is determined that the power battery reaches high power and it is determined that the maximum output current of the charging pile connected to the second direct-current charging circuit can meet the current charging of the power battery, terminating the charging of the first direct-current charging circuit.

2. The method of claim 1, wherein, The at least two direct-current charging circuits comprise a third direct-current charging circuit and a fourth direct-current charging circuit, and the third direct-current charging circuit and the fourth direct-current charging circuit are both direct charging circuits. ​ ​ ​ ​ 3. The method of claim 1, wherein, ​ ​ 4. The method of claim 1, wherein, ​ 5. The method of claim 4, wherein, The current maximum allowed charging current of the power battery is compared with the size of the current threshold to determine the current distribution strategy of the at least two direct-current charging loops, including: When the current maximum allowed charging current of the power battery is less than or equal to the second current threshold, the target current in the fourth direct-current charging loop is determined as half of the difference between the current maximum allowed charging current of the power battery and the output current of the on-board charger direct-current side, and the target current in the third direct-current charging loop is determined as the difference between the current maximum allowed charging current of the power battery and the current in the fourth direct-current charging loop and the output current of the on-board charger direct-current side; When the current maximum allowed charging current of the power battery is greater than the second current threshold, the smaller of the following two is determined as the target current in the fourth direct-current charging loop: The difference between the current maximum allowed charging current of the power battery and the output current of the on-board charger direct-current side and the second reserved value; and The maximum charging current in the fourth direct-current charging loop; When the current maximum allowed charging current of the power battery is greater than the second current threshold, the smaller of the following two is determined as the target current in the third direct-current charging loop: The difference between the current maximum allowed charging current of the power battery and the current in the fourth direct-current charging loop and the output current of the on-board charger direct-current side; and The maximum charging current in the third direct-current charging loop.

6. The method of claim 4, wherein, The method further includes: When the power battery is only directly charged by the third direct-current charging loop, the smaller of the following two is determined as the target current in the third direct-current charging loop: The difference between the current maximum allowed charging current of the power battery and the output current of the on-board charger direct-current side; and The maximum charging current of the third direct-current charging loop.

7. The method of claim 4, wherein, The method further includes: If it is determined that the power battery reaches high power and it is determined that the maximum output current of the charging pile connected to the fourth direct-current charging loop can meet the current charging of the power battery, the charging of the third direct-current charging loop is terminated.

8. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that, The program is executed by the processor to implement the steps of the method of any one of claims 1-7.

9. An electronic device, comprising: Comprising: A memory having a computer program stored thereon; A processor configured to execute the computer program in the memory to implement the steps of the method of any one of claims 1-7.

10. A vehicle characterized by comprising: The electronic device comprises a power battery and the electronic device of claim 9. The electronic device comprises a power battery and the electronic device of claim 9.

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