Charging control method, device, equipment, computer readable storage medium and program

Abstract

The invention discloses a charging control method and device, a computer readable storage medium and a program, after an electric device is connected with a charging device and before a charging parameter configuration stage, the maximum output voltage of the charging device is firstly obtained, then according to the maximum output voltage, it is determined that a battery is directly charged by using the voltage output by the electric device, and then the charging control is completed. According to the charging method and the charging device, the battery is charged after the voltage output by the electric equipment or the voltage output by the electric equipment is boosted, so that charging equipment in all output voltage ranges can be automatically adapted, additional operations of manually judging the charging equipment in advance and selecting a charging mode are avoided, and the charging speed and efficiency are further improved.

Description

Charging control method, device, equipment, computer-readable storage medium and program Technical Field

[0001] The present application relates to the field of new energy technologies, and more specifically, to a charging control method, apparatus, device, computer-readable storage medium, and program. Background Art

[0002] With the development of the new energy industry, many devices are powered by batteries. For example, vehicles can use the electricity in the battery to provide energy for the motor to achieve vehicle driving. The battery energy is mainly injected by external charging equipment.

[0003] With the widespread use of electrical devices, users have put forward increasingly higher requirements for the charging speed and efficiency of electrical devices. In order to improve the charging speed and efficiency of electrical devices, a new charging control method for electrical devices is needed.

[0004] Summary of the Invention

[0005] The present application provides a charging control method, apparatus, device, computer-readable storage medium, and program, which can select an appropriate charging mode for charging according to the maximum output voltage of the charging device, thereby improving the charging speed and efficiency.

[0006] In a first aspect, a method for controlling DC charging of an electrical device is provided, comprising:

[0007] After the charging interface of the power-consuming device is connected to the charging device, the maximum output voltage of the charging device is obtained;

[0008] The battery of the electric device is directly charged and / or boosted according to the maximum output voltage.

[0009] Through the control method for DC charging of electrical equipment provided in this embodiment, after the electrical equipment is connected to the charging equipment, before the charging parameter configuration stage, the maximum output voltage of the charging equipment is first obtained, and then based on the maximum output voltage, it is determined whether to use the voltage output by the electrical equipment to directly charge the battery or to boost the voltage output by the electrical equipment before charging the battery. This realizes a charging device that automatically adapts to all output voltage ranges, avoids the additional operation of manually identifying the charging device and selecting the charging method in advance, and thus improves the charging speed and efficiency.

[0010] As a possible implementation method, obtaining the maximum output voltage of the charging device includes:

[0011] Before the charging parameter configuration stage of the electric device, the maximum output voltage of the charging device is obtained through the voltage acquisition device set in the charging pile interface.

[0012] Through the technical solution of this implementation method, the maximum output voltage of the charging device can be collected.

[0013] As a possible implementation, directly charging and / or boosting charging of the battery of the power-consuming device according to the maximum output voltage includes:

[0014] Acquire a first voltage threshold of the electric device, wherein the first voltage threshold is greater than or equal to a maximum battery voltage of the electric device;

[0015] comparing the maximum output voltage to a first voltage threshold;

[0016] When it is determined that the maximum output voltage is greater than or equal to the first voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase;

[0017] When it is determined that the maximum output voltage is less than the first voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

[0018] Through the technical solution of this implementation, when the maximum output voltage of the charging device is greater than or equal to the first voltage threshold, the voltage output by the charging device is directly injected into the battery of the power-consuming device without the need for voltage boosting. This charging method eliminates the need for a motor to convert voltage, i.e., voltage boosting, thereby avoiding the energy loss caused by voltage conversion, resulting in higher charging efficiency and saving the time required for voltage conversion, thereby increasing charging speed. When the maximum output voltage of the charging device is less than the first voltage threshold, the voltage output by the charging device is first boosted before being injected into the battery, i.e., boosting the battery for charging, thereby resolving the problem of battery failure to charge or fully charge the battery.

[0019] As a possible implementation, directly charging and / or boosting charging of the battery of the power-consuming device according to the maximum output voltage includes:

[0020] Acquire a second voltage threshold and a third voltage threshold of the electric device, wherein the second voltage threshold is greater than or equal to a current battery voltage of the electric device, and the third voltage threshold is greater than or equal to a maximum battery voltage of the electric device;

[0021] comparing the maximum output voltage with the second voltage threshold and the third voltage threshold respectively;

[0022] When it is determined that the maximum output voltage is greater than or equal to a third voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase;

[0023] When it is determined that the maximum output voltage is less than or equal to the second voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

[0024] Through the technical solution of this implementation, when the maximum output voltage of the charging device is greater than or equal to the third voltage threshold, the voltage output by the charging device is used to directly charge the battery of the power-consuming device. That is, the voltage output by the charging device is directly injected into the battery of the power-consuming device without the need for voltage boosting. This charging method eliminates the need for a motor to convert voltage, i.e., voltage boosting, thereby avoiding the energy loss caused by voltage conversion, resulting in higher charging efficiency and saving the time required for voltage conversion, thereby increasing charging speed. When the maximum output voltage of the charging device is less than the second voltage threshold, the voltage output by the charging device is first boosted before being injected into the battery, i.e., boosting the battery for charging, thereby resolving the problem of battery charging failure and inability to fully charge the battery.

[0025] As a possible implementation, directly charging and / or boosting charging the battery of the electric device according to the maximum output voltage further includes:

[0026] When it is determined that the maximum output voltage is greater than the second voltage threshold and less than the third voltage threshold, charging is performed in the following manner during the charging phase:

[0027] Using the voltage output by the charging device to directly charge the battery of the power-consuming device, and obtaining the battery voltage and charging current during the charging process;

[0028] Obtaining a fourth voltage threshold and a current threshold, wherein the fourth voltage threshold is less than or equal to the maximum output voltage;

[0029] comparing the voltage of the battery with a fourth voltage threshold, and comparing the charging current with a current threshold;

[0030] When it is determined that the voltage of the battery is greater than the fourth voltage threshold and the charging current is greater than the current threshold, the voltage output by the charging device is boosted to charge the battery of the power-consuming device.

[0031] Through the technical solution of this implementation, when the maximum output voltage of the charging device is greater than the second voltage threshold and less than the third voltage threshold, the charging speed and efficiency are further improved by mixing direct charging and boost charging.

[0032] As a possible implementation, before directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase, the method further includes:

[0033] In the charging parameter configuration stage, the current battery voltage of the power-consuming device is sent to the charging device to perform charging parameter configuration.

[0034] As a possible implementation, in the charging phase, after boosting the voltage output by the charging device and before charging the battery of the power-consuming device, the method further includes:

[0035] In the charging parameter configuration stage, the preset pre-charge voltage is sent to the charging device to perform charging parameter configuration.

[0036] In a second aspect, a control device for DC charging of an electrical device is provided, comprising:

[0037] An acquisition unit, configured to acquire the maximum output voltage of the charging device after the charging interface of the electric device is connected to the charging device;

[0038] The charging unit is used to directly charge and / or boost the battery of the electrical device according to the maximum output voltage.

[0039] In a third aspect, a control device for DC charging of an electrical device is provided, wherein the device includes: a processor and a memory storing computer program instructions;

[0040] When the processor executes the computer program instructions, the charging control method of the first aspect is implemented.

[0041] In a fourth aspect, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the charging control method of the first aspect is implemented. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments of the present application. 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 the drawings without creative work.

[0043] FIG1 is a schematic structural diagram of a DC charging circuit provided by the prior art;

[0044] FIG2 is a schematic structural diagram of a DC charging circuit provided in an embodiment of the present application;

[0045] FIG3 is a flow chart of a charging control method provided in an embodiment of the present application;

[0046] FIG4 is a flow chart of directly charging and / or boosting a battery of an electrical device according to a maximum output voltage, provided by one embodiment of the present application;

[0047] FIG5 is a flowchart of directly charging and / or boosting a battery of an electrical device according to a maximum output voltage, provided by another embodiment of the present application;

[0048] FIG6 is a flow chart of charging an electric device provided in an embodiment of the present application;

[0049] FIG7 is a schematic structural diagram of a charging control device provided in an embodiment of the present application;

[0050] FIG8 is a schematic structural diagram of a charging control device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0052] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the specification of this application are for the purpose of describing specific embodiments only and are not intended to limit this application. The terms "including" and "having" and any variations thereof in the specification and claims of this application and the above-mentioned drawings are intended to cover non-exclusive inclusions. The terms "first" and "second" in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary-secondary relationship.

[0053] References to "embodiments" in this application mean that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor does it constitute an independent or alternative embodiment that is mutually exclusive of other embodiments.

[0054] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connected," and "attached" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to direct connections, indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0055] The term "and / or" in this application simply describes an association between related objects, indicating that three possible relationships exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the character " / " in this application generally indicates that the related objects are in an "or" relationship.

[0056] The term "plurality" used in this application refers to two or more (including two).

[0057] Currently, to ensure DC charging of batteries in electrical devices (such as electric vehicles and hybrid electric vehicles (HEVs), these devices are typically equipped with a DC charging device. This device primarily includes a charging port and a DC charging circuit. The charging port is used to connect to an external charging device (such as a DC charging station), while the DC charging circuit is primarily used to connect the charging port to the battery and charge the battery after the charging port is connected to the external charging device.

[0058] Generally, when an electrical device is charged using a charging device (such as a DC charging pile), it mainly includes the following stages:

[0059] Charging handshake phase, charging parameter configuration phase and charging phase.

[0060] The charging handshake phase primarily involves checking whether the charging port of the device is successfully connected to the charging device. Once the connection is confirmed, an insulation test is performed. This test verifies the insulation performance of the charging circuit to ensure the safety of the subsequent charging process. After the insulation test confirms safety, the charging parameter configuration phase begins. During this phase, the device and the charging device configure each other to determine whether charging is possible. Once charging is confirmed to be possible, the charging phase begins. During this phase, the device activates the DC charging circuit, allowing the charging device to charge the device's battery through the DC charging circuit.

[0061] Referring to FIG1 , which is a schematic diagram of a DC charging circuit provided in the prior art, the DC charging circuit mainly includes: a motor M, a first switching device K1, interface capacitors C1 and C2, and an inverter. The motor M can drive the motor.

[0062] The motor M includes a first winding U, a second winding V, and a third winding W forming a three-phase winding.

[0063] The inverter includes a first phase branch, a second phase branch, and a third phase branch connected in parallel. The first phase branch includes switches S1 and S2 connected in series, the second phase branch includes switches S3 and S4 connected in series, and the third phase branch includes switches S5 and S6 connected in series. The end of switch S1 not connected to switch S2, the end of switch S3 not connected to switch S4, and the end of switch S5 not connected to switch S6 are all connected to the positive input of the inverter. The end of switch S2 not connected to switch S1, the end of switch S4 not connected to switch S3, and the end of switch S6 not connected to switch S5 are all connected to the negative input of the inverter.

[0064] The positive input terminal of the inverter is connected to the positive terminal of the battery, and the negative input terminal of the inverter is connected to the negative terminal of the battery.

[0065] The first winding U is connected to the midpoint of the first phase branch, the second winding V is connected to the midpoint of the second phase branch, and the third winding W is connected to the midpoint of the third phase branch.

[0066] The interface capacitor C1 is connected in parallel with the inverter.

[0067] A first end of the first switching device K1 is connected to a connecting line between the first winding U and the midpoint of the first phase branch, and a second end of the first switching device K1 is externally connected to the positive electrode of the charging interface.

[0068] Connect the negative terminal of the charging port to the negative terminal of the battery.

[0069] A first end of the interface capacitor C2 is connected to the second end of the first switch device K1 , and a second end of the interface capacitor C2 is connected to the negative electrode of the battery.

[0070] When the DC charging circuit is connected to the charging device through the charging interface, when charging the battery, the switch tubes S1 and S2 can be turned off, the switch tubes S3, S4, S5, and S6 can be turned on, and the first switch device K1 can be closed. The switch tubes S3, S4, S5, and S6 form a boost circuit, thereby achieving boost charging of the battery.

[0071] By using the above-mentioned DC charging circuit, when charging the battery, the motor can be used to boost the voltage output by the charging device, thereby solving the problem that the output voltage of the charging device is too low to charge the battery.

[0072] However, when using the above-mentioned DC charging circuit to charge the battery, only boost charging can be performed, that is, the voltage output by the charging device needs to be boosted before it can be charged into the battery. However, boost charging requires voltage conversion by the motor, which may cause two kinds of "waste". One is the waste of energy, because the motor has conversion efficiency. Therefore, when boost charging is performed, the conversion efficiency of the motor will cause power loss. For example, if the conversion efficiency of the motor is 95%, it will cause 5% power loss. The other is the waste of time, because the motor boost is limited by power. If the maximum boost power of the motor is 80kW, then if the charging device is 120kW, the charging time will increase by 50%.

[0073] It can be seen that when the electrical equipment uses the above-mentioned DC charging circuit to charge the battery, there are problems such as slow charging speed and low charging efficiency.

[0074] In view of this, an embodiment of the present application provides a DC charging circuit, which, based on the DC charging circuit shown in FIG1 , adds a charging branch that can directly charge the battery without boosting.

[0075] 2 is a schematic structural diagram of a DC charging circuit provided in an embodiment of the present application. As shown in FIG2 , the DC charging circuit includes a first charging branch 210 and a second charging branch 220 .

[0076] Among them, the structure of the second charging branch 220 is basically the same as the structure of the DC charging circuit shown in Figure 1. The only difference is that a third switching device K3 is additionally provided in the second charging branch 220 provided in this embodiment. The third switching device K3 is arranged on the connection line between the second end of the first switching device K1 and the positive electrode of the charging interface.

[0077] The first charging branch 210 includes a second switch device K2 , one end of the second switch device K2 is connected to the positive electrode of the charging interface, and the other end is connected to the positive electrode of the battery.

[0078] Based on the DC charging circuit shown in Figure 2, when the DC charging circuit is connected to a charging device through a charging interface, when charging the battery, K2 can be disconnected, the switches S1 and S2 are turned off, the switches S3, S4, S5, and S6 are turned on, and the first switch K1 and the third switch K3 are closed. As a result, the switches S3, S4, S5, and S6 in the second charging branch form a boost circuit, thereby achieving boost charging of the battery.

[0079] Alternatively, the battery can be directly charged by the charging device through the first charging branch by closing K2 and opening K3, thereby achieving direct charging of the battery.

[0080] It can be seen that the above-mentioned DC charging branch can realize both boost charging of the battery and direct charging of the battery.

[0081] Based on this, in order to improve the charging speed and charging efficiency of electrical equipment, an embodiment of the present application provides a charging control method for controlling the charging process when the electrical equipment is charged by a charging device. The charging control method provided in the embodiment of the present application can be used to realize DC charging of the electrical equipment, which can be executed by the battery management system (BMS) of the electrical equipment, the vehicle controller or other on-board controller. Those skilled in the art will understand that in the embodiments of the present disclosure, the concepts of direct charging and boost charging should be understood according to the conventional meaning in this field. For example, direct charging can refer to charging according to the output voltage of a charging device such as a charging pile. During the direct charging process, the voltage output by the charging device is not boosted.

[0082] 3 is a flow chart of a charging control method provided in an embodiment of the present application. As shown in FIG3 , the charging control method provided in this embodiment may include the following steps:

[0083] S31. After the charging interface of the electric device is connected to the charging device, obtain the maximum output voltage of the charging device.

[0084] S32. Directly charge and / or boost charge the battery of the electrical device according to the maximum output voltage.

[0085] Through the charging control method provided in this embodiment, after the electrical device is connected to the charging device, before the charging parameter configuration stage, the maximum output voltage of the charging device is first obtained. Then, based on the maximum output voltage, it is determined whether to use the voltage output by the electrical device to directly charge the battery or to boost the voltage output by the electrical device before charging the battery. This realizes the automatic adaptation of the charging device to all output voltage ranges, avoids the additional operation of manually identifying the charging device and selecting the charging method in advance, and thus improves the charging speed and efficiency.

[0086] Moreover, the charging control method provided in this embodiment can adaptively select between direct charging and boost charging. Compared with the boost charging method used in all situations, it improves the charging speed and charging efficiency. Compared with the direct charging method used in all situations, it solves the problem of being unable to charge or fully charge due to insufficient output voltage of the charging device.

[0087] The following describes how to implement each of the above steps.

[0088] In some embodiments, the charging device is typically provided with a charging gun for charging the electrical device, and the electrical device is charged by inserting the charging gun into the charging interface of the electrical device. Based on this, in S13, if it is determined that the charging gun of the charging device is inserted into the charging interface, it can be determined that the charging interface of the electrical device is connected to the charging device.

[0089] In S31, before the charging parameter configuration phase of the power-consuming device, the maximum output voltage of the charging device is obtained. The maximum output voltage of the charging device can be obtained during the charging handshake phase because the charging device uses the maximum output voltage for insulation testing during the charging handshake phase. Thus, the maximum output voltage of the charging device can be obtained during the charging handshake phase.

[0090] In some embodiments, a voltage acquisition device can be pre-installed in the charging interface of the electrical device to collect the voltage output by the charging device. For example, a first voltage sampling point and a second voltage sampling point can be set at the high-voltage output end of the charging interface. The first voltage sampling point is used to collect the positive voltage Uc output by the charging device after the charging interface is connected to the charging device, and the second voltage sampling point is used to collect the negative voltage U0 output by the charging device after the charging interface is connected to the charging device. In this way, when obtaining the maximum output voltage of the charging device, the positive voltage Uc and negative voltage U0 output by the charging device can be collected using the voltage sampling points configured in the charging interface. The difference between the positive voltage Uc and negative voltage U0 is used as the maximum output voltage of the charging device.

[0091] Through the technical solution of this implementation method, the maximum output voltage of the charging device can be collected.

[0092] The above is the implementation method of S31. The implementation method of S32 is introduced below.

[0093] In some embodiments, when directly charging and / or boosting the battery of the power-consuming device according to the maximum output voltage of the charging device, S32 may include the following steps:

[0094] S41. Obtain a first voltage threshold of the electric device, where the first voltage threshold is greater than or equal to a maximum battery voltage of the electric device.

[0095] The maximum battery voltage of the electrical device is the maximum voltage value of a battery that currently needs to be charged in the electrical device, and the maximum voltage value of the battery is usually a fixed value.

[0096] In one example, the first voltage threshold may be pre-set based on the maximum voltage of the power-consuming device and stored in a local file of the power-consuming device or an accessible server. In this way, when obtaining the first voltage threshold, it can be directly obtained from the storage location.

[0097] In another example, when obtaining the first voltage threshold, the maximum battery voltage of the electrical device may be obtained and then used as the first voltage threshold. Alternatively, the maximum battery voltage obtained may be added to a preset first voltage value and the sum obtained may be used as the first voltage threshold. The first voltage value may be set based on actual conditions, for example, 10V. In one example, if the maximum battery voltage of the electrical device is 750V, the first voltage threshold may be 750V or 760V.

[0098] S42. Compare the maximum output voltage with the first voltage threshold to determine whether the maximum output voltage is less than the first voltage threshold. If it is determined that the maximum output voltage is greater than or equal to the first voltage threshold, execute S43; if it is determined that the maximum output voltage is less than the first voltage threshold, execute S44.

[0099] S43. During the charging phase, the voltage output by the charging device is used to directly charge the battery of the power-consuming device.

[0100] When the maximum output voltage of the charging device is greater than or equal to the first voltage threshold, it can be determined that the maximum output voltage of the charging device is greater than the maximum voltage of the battery to be charged. In this case, the charging device can directly charge the battery of the power-consuming device and ensure that the battery is fully charged. Therefore, in this case, the voltage output by the charging device can be used to directly charge the battery of the power-consuming device, that is, the voltage output by the charging device is directly injected into the battery of the power-consuming device without the need for voltage boosting. Charging in this way does not require the use of a motor for voltage conversion, that is, no voltage boost is required, thereby avoiding the energy loss caused by voltage conversion, making charging more efficient, and also saving the time required for voltage conversion, which means that the charging speed is increased.

[0101] For example, if an electrical device is equipped with the DC charging circuit shown in Figure 2, the first charging branch can be used to directly charge the device's battery using the voltage output by the charging device. During the charging phase, by closing K2 and opening K3, the first charging branch is turned on and the second charging branch is disconnected, allowing the voltage output by the charging device to be directly injected into the battery through the first charging branch.

[0102] Before the charging phase, charging parameter configuration is required. Based on this, before using the voltage output by the charging device to directly charge the battery of the power-consuming device during the charging phase, the current battery voltage of the power-consuming device can be sent to the charging device as a charging parameter during the charging parameter configuration phase to configure the charging parameters. When sending the current battery voltage to the charging device, the current battery voltage can be added to a BCP (Battery Charging Parameters) message, and then the BCP message is sent to the charging device so that the charging device determines whether it can charge the battery of the power-consuming device based on the current battery voltage. Usually, when the charging device determines that the voltage value carried in the BCP message is less than the maximum output voltage value of the charging device, it determines that the battery can be charged. Based on the previous judgment that the current battery voltage is less than the maximum output voltage of the charging device, the charging device can determine that the battery can be charged after receiving the BCP message, thereby entering the charging phase.

[0103] S44. During the charging phase, the voltage output by the charging device is boosted and then used to charge the battery of the power-consuming device.

[0104] When the maximum output voltage of the charging device is less than the first voltage threshold, it can be determined that the maximum output voltage of the charging device is less than or close to the maximum voltage of the battery to be charged. At this time, if DC charging is used, the battery may not be charged or fully charged due to the voltage of the charging device being insufficient. Therefore, in this case, the voltage output by the charging device is first boosted and then injected into the battery, that is, the battery is boosted and charged, thereby solving the problem of being unable to charge the battery or being unable to fully charge the battery.

[0105] Taking the example of an electrical device equipped with the DC charging circuit shown in Figure 2, the second charging branch can be used to boost the voltage output by the charging device and charge the device's battery. During the charging phase, K2 is controlled to be disconnected, switches S1 and S2 are controlled to be off, switches S3, S4, S5, and S6 are controlled to be on, and K1 and K3 are controlled to be closed. In this way, switches S3, S4, S5, and S6 in the second charging branch form a boost circuit, thereby achieving boosted charging of the battery.

[0106] Charging parameters need to be configured before the charging stage. Based on this, after the voltage output by the charging device is boosted during the charging stage and before charging the battery of the power-consuming device, in the charging parameter configuration stage, the preset pre-charge voltage is sent to the charging device for charging parameter configuration.

[0107] The pre-charge voltage is pre-set based on actual conditions and stored in a local file on the device or in an accessible server node. The pre-charge voltage can be set based on the boost circuit in the second charging branch. Typically, the pre-charge voltage is less than the maximum battery voltage and less than the maximum output voltage of the charging device.

[0108] When sending the pre-charge voltage to the charging device, the pre-charge voltage can be added to the BCP message, and then the BCP message is sent to the charging device, so that the charging device can determine whether it can charge the battery of the power-consuming device based on the pre-charge voltage. Generally, when the charging device determines that the voltage value carried in the BCP message is less than the maximum output voltage value of the charging device, it determines that the battery can be charged. According to the setting of the pre-charge voltage, it can be determined that the pre-charge voltage is less than the maximum output voltage of the charging device. Therefore, after receiving the BCP message, the charging device can determine that the battery can be charged through judgment, thus entering the charging stage.

[0109] In some embodiments, in S32, when directly charging and / or boost charging the battery of the power-consuming device according to the maximum output voltage of the charging device, as shown in FIG5 , the following steps may be included:

[0110] S51. Obtain a second voltage threshold and a third voltage threshold of the electric device, wherein the second voltage threshold is greater than or equal to the current battery voltage of the electric device, and the third voltage threshold is greater than or equal to the maximum battery voltage of the electric device.

[0111] In one example, when obtaining the second voltage threshold, the current battery voltage of the electric device can be obtained and then used as the second battery voltage, or the current battery voltage can be added to a preset second voltage value and the sum obtained can be used as the second voltage threshold. The second voltage value can be preset according to actual conditions, for example, 30V.

[0112] In one example, the third voltage threshold may be pre-set based on the maximum voltage of the power-consuming device and stored in a local file of the power-consuming device or an accessible server. Thus, when obtaining the third voltage threshold, it can be directly obtained from the storage location.

[0113] In another example, when obtaining the third voltage threshold, the maximum battery voltage of the electrical device may be obtained and then used as the third voltage threshold. Alternatively, the maximum battery voltage obtained may be added to a preset third voltage value and the sum may be used as the third voltage threshold. The third voltage value may be set based on actual conditions, for example, 10V. In one example, if the maximum battery voltage of the electrical device is 750V, the first voltage threshold may be 750V or 760V.

[0114] Because the third voltage threshold is greater than or equal to the maximum battery voltage, the second voltage threshold is greater than or equal to the current battery voltage, and when the battery is charging, its current battery voltage is usually lower than the maximum battery voltage, the third voltage threshold is usually greater than the second voltage threshold.

[0115] S52. Compare the maximum output voltage with the second voltage threshold and the third voltage threshold respectively. If the comparison determines that the maximum output voltage is greater than or equal to the third voltage threshold, execute S53. If the comparison determines that the maximum output voltage is less than or equal to the second voltage threshold, execute S54. If the comparison determines that the maximum output voltage is greater than the second voltage threshold and less than the third voltage threshold, execute S55.

[0116] S53. During the charging phase, the voltage output by the charging device is used to directly charge the battery of the power-consuming device.

[0117] If the maximum output voltage of the charging device is greater than or equal to the third voltage threshold, it can be determined that the maximum output voltage of the charging device is greater than the maximum voltage of the battery to be charged. In this case, the charging device can directly charge the battery of the power-consuming device and ensure that the battery is fully charged. Therefore, in this case, the voltage output by the charging device can be used to directly charge the battery of the power-consuming device, that is, the voltage output by the charging device is directly injected into the battery of the power-consuming device without the need for voltage boosting. This charging method eliminates the need for a motor to perform voltage conversion, that is, no voltage boost is required, thus avoiding the energy loss caused by voltage conversion, making charging more efficient, and also saving the time required for voltage conversion, which in turn increases charging speed.

[0118] The specific implementation method of directly charging the battery of the power-consuming device using the voltage output by the charging device is the same as S43, and will not be repeated here to avoid repetition.

[0119] Before the charging phase, charging parameter configuration is required. Therefore, before directly charging the battery of the consumer device using the voltage output by the charging device during the charging phase, the current battery voltage of the consumer device can be sent to the charging device as a charging parameter to configure the charging parameters. The specific sending method is described in the corresponding implementation method of S43 and will not be repeated here.

[0120] S54. During the charging phase, the voltage output by the charging device is boosted and then used to charge the battery of the power-consuming device.

[0121] When the maximum output voltage of the charging device is less than the second voltage threshold, it can be determined that the maximum output voltage of the charging device is less than or close to the current battery voltage. At this time, if DC charging is used, the battery may not be charged because the voltage of the charging device is not large enough. Therefore, in this case, the voltage output by the charging device is first boosted and then injected into the battery, that is, the battery is boosted and charged, thereby solving the problem of being unable to charge the battery and unable to fully charge the battery.

[0122] The specific implementation method of charging the battery of the power-consuming device after boosting the voltage output by the charging device is the same as S44, and will not be repeated here to avoid repetition.

[0123] Before the charging phase, charging parameter configuration is required. Therefore, after boosting the voltage output by the charging device and before charging the battery of the power-consuming device, during the charging parameter configuration phase, a preset pre-charge voltage is sent to the charging device to configure the charging parameters. The specific sending method is described in the corresponding implementation of S44 and will not be repeated here.

[0124] S55. In the charging stage, the voltage output by the charging device is first used to directly charge the battery of the electric device, and then the voltage output by the charging device is boosted to charge the battery of the electric device.

[0125] When the maximum output voltage of the charging device is between the second voltage threshold and the third voltage threshold, it means that the maximum output voltage of the charging device is greater than the current battery voltage. Therefore, the battery can be charged with DC at this time. However, since the maximum output voltage is less than or close to the maximum voltage value of the battery, the battery may not be fully charged if direct charging is always used. If the boost charging method is used consistently, there will be problems such as large power loss and slow charging speed. Therefore, in order to ensure that the battery can be fully charged while reducing power loss and increasing the charging speed, in this case, the voltage output by the charging device is first used to directly charge the battery of the electrical device, and then the voltage output by the charging device is boosted to charge the battery of the electrical device. In this way, the advantages of direct charging and boost charging are combined, and while ensuring that the battery can be fully charged, power loss is further reduced and the charging speed is increased.

[0126] In one example, in S55, charging can be performed in the following manner during the charging phase:

[0127] The battery of the electrical device is directly charged using the voltage output by the charging device, and during the charging process, the battery voltage (referring to the real-time voltage of the battery) and the charging current are obtained, and a fourth voltage threshold and a current threshold are obtained, wherein the fourth voltage threshold is less than or equal to the maximum output voltage, the battery voltage is compared with the fourth voltage threshold, and the charging current is compared with the current threshold. When it is determined that the battery voltage is greater than the fourth voltage threshold and the charging current is greater than the current threshold, the voltage output by the charging device is boosted to charge the battery of the electrical device.

[0128] The implementation method of directly charging the battery of the power-consuming device using the voltage output by the charging device is the same as S43 , and will not be described again here to avoid repetition.

[0129] When obtaining the fourth voltage threshold, the maximum output voltage of the charging device can be obtained and then used as the fourth voltage threshold, or the difference between the maximum output voltage and a preset fourth voltage value can be used as the fourth voltage threshold. The fourth voltage value can be set according to actual conditions, for example, 10V.

[0130] The current threshold is the minimum operating voltage of a boost device used to boost the voltage output by the charging device.

[0131] The reason why direct charging is switched to boost charging when it is determined that the battery voltage is greater than the fourth voltage threshold and the charging current is greater than the current threshold is that when the battery voltage is greater than the fourth voltage threshold, it means that the maximum output voltage of the charging device is less than or close to the current voltage of the battery. At this time, the battery can no longer be directly charged. When the charging current is less than or equal to the current threshold, the boost device cannot boost the voltage. Therefore, only when the above two conditions are met will the direct charging be switched to boost charging.

[0132] Taking the example of an electrical device equipped with a DC charging circuit as shown in FIG2 , the current threshold may be the minimum operating voltage of the motor, which can be calculated according to the following formula based on the maximum boost power of the motor and the maximum output voltage of the charging device:

[0133] I=P m / U cm1

[0134] Among them, I represents the current threshold, that is, the minimum operating current of the motor, P m Indicates the maximum boost power of the motor, U cm1 Indicates the maximum output voltage of the charging device.

[0135] When switching from direct charging to boost charging, based on the DC charging circuit shown in Figure 2, K2 can be controlled to be disconnected, switches S1 and S2 can be controlled to be turned off, switches S3, S4, S5, and S6 can be controlled to be turned on, and K1 and K3 can be controlled to be closed. In this way, switches S3, S4, S5, and S6 in the second charging branch form a boost loop, thereby achieving boost charging of the battery.

[0136] Furthermore, before directly charging the battery of the power-consuming device using the voltage output by the charging device in S55, charging parameters can be configured. During this charging parameter configuration phase, the current battery voltage of the power-consuming device can be sent to the charging device for charging parameter configuration. The specific transmission method is described in the corresponding implementation method of S43 and will not be repeated here.

[0137] 6 , which is a flowchart of charging an electrical device equipped with the DC charging circuit shown in FIG. 2 .

[0138] As shown in Figure 6, when the electric device is DC charging, during the charging handshake phase, the maximum output voltage U of the charging device is collected. cm1 , the maximum battery voltage and current battery voltage of the electric device, and determining the third voltage threshold U according to the maximum battery voltage 阈值3 , determine the second voltage threshold U according to the current battery voltage 阈值2 , will U cm1 Respectively with U 阈值3 and U 阈值2 For comparison, if U cm1 Greater than or equal to U 阈值3 , then in the charging parameter configuration stage, the BCP message sends the current battery voltage, and in the charging stage, the first charging branch is controlled to perform direct charging; if U cm1 Located in U 阈值3 and U 阈值2 In the charging parameter configuration phase, the BCP message sends the current battery voltage. In the charging phase, the first charging branch is controlled to perform direct charging. During the charging process, it is determined whether the current battery temperature U1 is greater than the fourth voltage threshold U 阈值4 , and the charging current is greater than the current threshold I. When it is determined that the above conditions are met, charging is suspended, the first charging branch is switched to the second charging branch, and then the second charging branch is controlled to perform boost charging. When it is determined that the above conditions are not met, the first charging branch is continued to be controlled for direct charging; if U cm1 Less than or equal to U 阈值2 , then in the charging parameter configuration stage, the BCP message sends the pre-charge voltage, and in the charging stage, the second charging branch is controlled to perform boost charging.

[0139] Assume that the maximum battery voltage of the electrical device is 810V, the initial battery voltage during battery charging is U1 = 600V, the maximum motor boost power Pm in the second charging branch is 80kW, and the electrical device is connected to a 120kW charging device with an output voltage range of 300-750V.

[0140] In an example, assuming that the maximum battery voltage of the power device is 810V, the initial battery voltage U1 = 600V, the initial battery voltage refers to the current battery voltage obtained when charging starts, the maximum boost power Pm of the motor in the second charging branch = 80kW, and the charging device is a 120kW charging pile with an output voltage range of 300-750V. 阈值2 is the sum of U1 and 30V, that is, 630V, U 阈值4 For U cm1 The difference from 10V is 740V, I=P m / U cm1 =80kw / 750V=106.7A.

[0141] Based on the process shown in Figure 6: U can be determined cm1 Greater than U 阈值2 In the charging phase, K2 is closed first and DC charging is performed using the first charging branch. During the charging process, the current battery voltage obtained is greater than U 阈值4 , and when the charging current is greater than 106.7A, charging is suspended, K2 is disconnected, K3 is closed, and the second charging branch is switched to continue boost charging.

[0142] Based on the above assumptions, the hybrid charging mode shown in Figure 6 is compared with the boost charging mode, resulting in the following table:

[0143]

[0144] As can be seen from the above table, compared with charging in boost charging mode alone, the charging power is higher when hybrid charging mode is used, thereby improving charging efficiency and saving energy.

[0145] Based on the control method for DC charging of an electrical device provided in the above embodiment, the embodiment of the present application also provides a specific implementation of a control device for DC charging of an electrical device.

[0146] 7 is a schematic diagram of the structure of a charging control device provided by an exemplary embodiment of the present application. As shown in FIG7 , the charging control device provided by this embodiment may include:

[0147] The acquisition unit 701 is configured to acquire the maximum output voltage of the charging device after the charging interface of the electric device is connected to the charging device.

[0148] The charging unit 702 is configured to directly charge and / or boost charge the battery of the electrical device according to the maximum output voltage.

[0149] The charging control device provided in this embodiment obtains the maximum output voltage of the charging device after the power-consuming device is connected to the charging device, and then charges the battery of the power-consuming device based on the maximum output voltage. According to this embodiment, the charging method can be determined and executed based on the maximum output voltage of the charging device, eliminating the additional steps of manually identifying the charging device and selecting the charging method in advance, thereby improving charging speed and efficiency.

[0150] In some embodiments, the acquiring unit 701 may acquire the maximum output voltage of the charging device through a voltage acquisition device provided in the charging pile interface before the charging parameter configuration phase of the electric device.

[0151] In some embodiments, the charging unit 702 can be used to:

[0152] Acquire a first voltage threshold of the electric device, wherein the first voltage threshold is greater than or equal to a maximum battery voltage of the electric device;

[0153] comparing the maximum output voltage to a first voltage threshold;

[0154] When it is determined that the maximum output voltage is greater than or equal to the first voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase;

[0155] When it is determined that the maximum output voltage is less than the first voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

[0156] In some embodiments, the charging unit 702 can be used to:

[0157] Acquire a second voltage threshold and a third voltage threshold of the electric device, wherein the second voltage threshold is greater than or equal to a current battery voltage of the electric device, and the third voltage threshold is greater than or equal to a maximum battery voltage of the electric device;

[0158] comparing the maximum output voltage with the second voltage threshold and the third voltage threshold respectively;

[0159] When it is determined that the maximum output voltage is greater than or equal to a third voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase;

[0160] When it is determined that the maximum output voltage is less than or equal to the second voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

[0161] In some embodiments, the charging unit 702 may also be used to:

[0162] When it is determined that the maximum output voltage is greater than the second voltage threshold and less than the third voltage threshold, charging is performed in the following manner during the charging phase:

[0163] Using the voltage output by the charging device to directly charge the battery of the power-consuming device, and obtaining the battery voltage and charging current during the charging process;

[0164] Obtaining a fourth voltage threshold and a current threshold, wherein the fourth voltage threshold is less than or equal to the maximum output voltage;

[0165] comparing the voltage of the battery with a fourth voltage threshold, and comparing the charging current with a current threshold;

[0166] When it is determined that the voltage of the battery is greater than the fourth voltage threshold and the charging current is greater than the current threshold, the voltage output by the charging device is boosted to charge the battery of the power-consuming device.

[0167] In some embodiments, the apparatus may further include: a parameter configuration unit;

[0168] The parameter configuration unit is used to send the current battery voltage of the power-consuming device to the charging device during the charging parameter configuration phase before directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase to configure the charging parameters.

[0169] In some embodiments, the parameter configuration unit can also be used to send a preset pre-charge voltage to the charging device during the charging parameter configuration phase after boosting the voltage output by the charging device and before charging the battery of the power-consuming device for charging parameter configuration.

[0170] FIG8 shows a schematic diagram of the hardware structure of the charging control device provided in an embodiment of the present application.

[0171] The charging control device may include a processor 801 and a memory 802 storing computer program instructions.

[0172] Specifically, the processor 801 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.

[0173] The memory 802 may include a large capacity memory for data or instructions. By way of example and not limitation, the memory 802 may include a hard disk drive (HDD), a floppy disk drive, a flash memory, an optical disk, a magneto-optical disk, a magnetic tape, or a universal serial bus (USB) drive, or a combination of two or more of these. Where appropriate, the memory 802 may include removable or non-removable (or fixed) media. Where appropriate, the memory 802 may be inside or outside the integrated gateway disaster recovery device. In a specific embodiment, the memory 802 is a non-volatile solid-state memory.

[0174] The memory 802 may include a read-only memory (ROM), a random access memory (RAM), a magnetic disk storage medium device, an optical storage medium device, a flash memory device, an electrical, optical, or other physical / tangible memory storage device. Thus, generally, the memory 802 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 in the method according to the first aspect of the present disclosure.

[0175] The processor 801 implements any one of the charging control methods in the above embodiments by reading and executing computer program instructions stored in the memory 802 .

[0176] In one example, the battery status detection device may further include a communication interface 803 and a bus 180. As shown in FIG8, the processor 801, the memory 802, and the communication interface 803 are connected via a bus 810 and communicate with each other.

[0177] The communication interface 803 is mainly used to implement communication between various modules, devices, units and / or equipment in the embodiments of the present application.

[0178] Bus 810 includes hardware, software or both, and the components of online data flow metering equipment are coupled to each other. For example, but not limitation, bus can include accelerated graphics port (AGP) or other graphics bus, enhanced industry standard architecture (EISA) bus, front side bus (FSB), hypertransport (HT) interconnection, industry standard architecture (ISA) bus, infinite bandwidth interconnection, low pin count (LPC) bus, memory bus, micro channel architecture (MCA) bus, peripheral component interconnection (PCI) bus, PCI-Express (PCI-X) bus, serial advanced technology attachment (SATA) bus, video electronics standard association local (VLB) bus or other suitable bus or two or more of these combinations. In appropriate cases, bus 810 can include one or more buses. Although the present application embodiment describes and shows specific bus, the application considers any suitable bus or interconnection.

[0179] In addition, in conjunction with the battery status detection method in the above embodiment, the present application embodiment can provide a computer storage medium for implementation. The computer storage medium stores computer program instructions; when the computer program instructions are executed by a processor, any one of the charging control methods in the above embodiment is implemented.

[0180] It should be noted that, unless there is any conflict, the embodiments and features in the embodiments of this application can be combined with each other.

[0181] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A charging control method, comprising: After the charging interface of the electric device is connected to the charging device, obtaining the maximum output voltage of the charging device; The battery of the electric device is directly charged and / or boosted charged according to the maximum output voltage.

2. The method according to claim 1, wherein The obtaining of the maximum output voltage of the charging device includes: Before the charging parameter configuration stage of the electric device, the maximum output voltage of the charging device is obtained through the voltage acquisition device provided in the charging pile interface.

3. The method according to claim 1, wherein The directly charging and / or boost charging of the battery of the electric device according to the maximum output voltage includes: Acquire a first voltage threshold of the electric device, wherein the first voltage threshold is greater than or equal to a maximum battery voltage of the electric device; comparing the maximum output voltage with the first voltage threshold; When it is determined that the maximum output voltage is greater than or equal to the first voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase; When it is determined that the maximum output voltage is less than the first voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

4. The method according to claim 1, wherein The directly charging and / or boost charging of the battery of the electric device according to the maximum output voltage includes: Acquire a second voltage threshold and a third voltage threshold of the electric device, wherein the second voltage threshold is greater than or equal to the current battery voltage of the electric device, and the third voltage threshold is greater than or equal to the maximum battery voltage of the electric device; comparing the maximum output voltage with the second voltage threshold and the third voltage threshold respectively; When it is determined that the maximum output voltage is greater than or equal to the third voltage threshold, directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase; When it is determined that the maximum output voltage is less than or equal to the second voltage threshold, the battery of the power-consuming device is charged after the voltage output by the charging device is boosted during the charging phase.

5. The method according to claim 4, wherein The directly charging and / or boost charging of the battery of the electric device according to the maximum output voltage further includes: When it is determined that the maximum output voltage is greater than the second voltage threshold and less than the third voltage threshold, charging is performed in the following manner during the charging phase: Using the voltage output by the charging device to directly charge the battery of the power-consuming device, and obtaining the voltage and charging current of the battery during the charging process; Acquire a fourth voltage threshold and a current threshold, wherein the fourth voltage threshold is less than or equal to the maximum output voltage; comparing the voltage of the battery with the fourth voltage threshold, and comparing the charging current with the current threshold; When it is determined that the voltage of the battery is greater than the fourth voltage threshold and the charging current is greater than the current threshold, the voltage output by the charging device is boosted to charge the battery of the power-consuming device.

6. The method according to any one of claims 3 to 5, wherein: Before directly charging the battery of the power-consuming device using the voltage output by the charging device during the charging phase, the method further includes: In the charging parameter configuration stage, the current battery voltage of the power-consuming device is sent to the charging device to perform charging parameter configuration.

7. The method according to claim 3 or 4, wherein: In the charging phase, after boosting the voltage output by the charging device and before charging the battery of the power-consuming device, the method further includes: In the charging parameter configuration stage, the preset pre-charge voltage is sent to the charging device to perform charging parameter configuration.

8. A charging control device comprising: an acquiring unit, configured to acquire the maximum output voltage of the charging device after the charging interface of the electric device is connected to the charging device; A charging unit is used to directly charge and / or boost charge the battery of the electric device according to the maximum output voltage.

9. A charging control device, wherein: The device includes: a processor and a memory storing computer program instructions; When the processor executes the computer program instructions, the charging control method according to any one of claims 1 to 7 is implemented.

10. A computer-readable storage medium, wherein: The computer-readable storage medium stores computer program instructions, and when the computer program instructions are executed by a processor, the charging control method according to any one of claims 1 to 7 is implemented.

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