Vehicle battery charging method, device and vehicle

Abstract

The application discloses a vehicle battery charging method and device and a vehicle. The method comprises the following steps: in response to detecting that a vehicle battery and a charging device are connected, acquiring a first charging voltage of the charging device, wherein the first charging voltage is used to represent the maximum output voltage of the charging device in an insulation detection process of the charging device; comparing the first charging voltage with a second charging voltage of the vehicle battery to obtain a first comparison result, wherein the second charging voltage is used to represent the maximum voltage that can be borne by the vehicle battery when the vehicle battery is normally charged; and charging the vehicle battery according to a preset charging loop based on the first comparison result and a loop state of the preset charging loop, wherein the loop state is used to represent whether the preset charging loop can normally operate. The application solves the technical problem of low efficiency when charging the vehicle battery in the related art.

Description

Technical Field

[0001] This invention relates to the field of vehicle control, and more specifically, to a vehicle battery charging method, apparatus, and vehicle. Background Technology

[0002] To reduce power loss in vehicle cables, operators can choose to install high-voltage systems in vehicles to reduce the current transmitted through the cables, thereby reducing heat loss and cable weight. However, many charging devices currently used for vehicle batteries operate on low-voltage platforms. Directly using low-voltage charging devices to charge high-voltage vehicles may result in slow charging efficiency or even damage to the battery. Therefore, most vehicle battery charging circuits incorporate boost converters to enhance the charging power received from low-voltage charging devices. However, when using boost converters to charge vehicle batteries, the battery charging system needs to interact with the charging equipment multiple times, leading to lower charging efficiency.

[0003] There is currently no effective solution to the above problems. Summary of the Invention

[0004] This invention provides a vehicle battery charging method, apparatus, and vehicle to at least solve the technical problem of low efficiency when charging vehicle batteries in related technologies.

[0005] According to one aspect of the present invention, a vehicle battery charging method is provided, comprising: in response to detecting a connection between a vehicle battery and a charging device, acquiring a first charging voltage of the charging device, wherein the first charging voltage is used to characterize the maximum output voltage of the charging device during insulation testing of the charging device; comparing the first charging voltage with a second charging voltage of the vehicle battery to obtain a first comparison result, wherein the second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging; and charging the vehicle battery according to a preset charging circuit based on the first comparison result and a circuit state of a preset charging circuit, wherein the circuit state is used to characterize whether the preset charging circuit can operate normally.

[0006] Optionally, obtaining the first charging voltage of the charging device includes: obtaining the rated charging voltage of the charging device; determining the minimum value of the rated charging voltage and the second charging voltage as the insulation detection voltage; and performing insulation detection on the charging device based on the insulation detection voltage to obtain the first charging voltage.

[0007] Optionally, the preset charging circuit includes at least: a first charging circuit and a second charging circuit, wherein the first charging circuit includes at least: a vehicle battery and a first circuit switch, the second charging circuit includes at least: a vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit.

[0008] Optionally, based on the first comparison result and the loop state of the preset charging loop, the vehicle battery is charged according to the preset charging loop, including: in response to the first comparison result being that the first charging voltage is greater than or equal to the second charging voltage, obtaining the first loop state and the second loop state; in response to the first loop state being that the first charging loop is operating normally, charging the vehicle battery according to the first charging loop; in response to the first loop state being that the first charging loop is operating abnormally and the second loop state being that the second charging loop is operating normally, charging the vehicle battery according to the second charging loop.

[0009] Optionally, the method further includes: in response to a first comparison result that the first charging voltage is less than the second charging voltage, obtaining the current actual voltage of the vehicle battery; comparing the first charging voltage and the actual voltage to obtain a second comparison result; in response to a second comparison result that the first charging voltage is greater than or equal to the actual voltage and the first circuit state is that the first charging circuit is operating normally, charging the vehicle battery according to the first charging circuit; in response to a second comparison result that the first charging voltage is less than the actual voltage and the second circuit state is that the second charging circuit is operating normally, charging the vehicle battery according to the second charging circuit.

[0010] Optionally, in response to the preset charging circuit being the first charging circuit, charging the vehicle battery according to the preset charging circuit includes: determining a charging voltage range based on a first charging voltage and the actual voltage of the vehicle battery; and charging the vehicle battery according to the first charging circuit based on the charging voltage range.

[0011] Optionally, the method further includes: in response to detecting that the vehicle battery has started charging, acquiring a third charging voltage at the charging interface of the vehicle battery; obtaining a voltage difference based on the difference between the third charging voltage and the first charging voltage; in response to the voltage difference being less than a preset threshold and the second circuit being in normal operation, switching the first charging circuit to the second charging circuit and charging the vehicle battery based on the second charging circuit; and in response to the voltage difference being less than the preset threshold and the second circuit being in abnormal operation, controlling the vehicle battery to stop charging.

[0012] Optionally, in response to the preset charging circuit being a second charging circuit, charging the vehicle battery according to the preset charging circuit includes: boosting the first charging voltage based on the boost converter and the calibrated voltage range to obtain a target charging voltage; determining the target charging power by the minimum value among the current first charging power of the vehicle battery, the second charging power of the charging device, and the third charging power of the boost converter; and controlling the boost converter to output power to the vehicle battery based on the target charging voltage and the target charging power to charge the vehicle battery.

[0013] According to another aspect of the present invention, a vehicle battery charging device is also provided, comprising: a voltage detection module, configured to acquire a first charging voltage of the charging device in response to detecting a connection between the vehicle battery and the charging device, wherein the first charging voltage is used to characterize the maximum output voltage of the charging device during insulation testing; a voltage comparison module, configured to compare the first charging voltage with a second charging voltage of the vehicle battery to obtain a first comparison result, wherein the second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging; and a battery charging module, configured to charge the vehicle battery according to a preset charging circuit based on the first comparison result and the circuit state of a preset charging circuit, wherein the circuit state is used to characterize whether the preset charging circuit can operate normally.

[0014] Optionally, the voltage detection module includes: a voltage acquisition unit for acquiring the rated charging voltage of the charging device; a voltage determination unit for determining the minimum value of the rated charging voltage and the second charging voltage as the insulation detection voltage; and a voltage detection unit for performing insulation detection on the charging device based on the insulation detection voltage to obtain a first charging voltage.

[0015] Optionally, the preset charging circuit includes at least: a first charging circuit and a second charging circuit, wherein the first charging circuit includes at least: a vehicle battery and a first circuit switch, the second charging circuit includes at least: a vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit.

[0016] Optionally, the battery charging module includes: a status acquisition unit, configured to acquire a first circuit status and a second circuit status in response to a first comparison result indicating that a first charging voltage is greater than or equal to a second charging voltage; a first charging unit, configured to charge the vehicle battery according to the first charging circuit in response to a first circuit status indicating that the first charging circuit is operating normally; and a second charging unit, configured to charge the vehicle battery according to the second charging circuit in response to a first circuit status indicating that the first charging circuit is operating abnormally and a second circuit status indicating that the second charging circuit is operating normally.

[0017] Optionally, the device further includes: an actual voltage acquisition module, configured to acquire the current actual voltage of the vehicle battery in response to a first comparison result that the first charging voltage is less than the second charging voltage; compare the first charging voltage and the actual voltage to obtain a second comparison result; a first charging module, configured to charge the vehicle battery according to the first charging circuit in response to a second comparison result that the first charging voltage is greater than or equal to the actual voltage and the first circuit state is that the first charging circuit is operating normally; and a second charging module, configured to charge the vehicle battery according to the second charging circuit in response to a second comparison result that the first charging voltage is less than the actual voltage and the second circuit state is that the second charging circuit is operating normally.

[0018] Optionally, in response to the preset charging circuit being the first charging circuit, the battery charging module further includes: a range determining unit, used to determine a charging voltage range based on the first charging voltage and the actual voltage of the vehicle battery; and a third charging unit, used to charge the vehicle battery according to the first charging circuit based on the charging voltage range.

[0019] Optionally, the device further includes: a fourth voltage acquisition module, used to acquire a third charging voltage at the charging interface of the vehicle battery in response to detecting that the vehicle battery has started charging; a voltage difference determination module, used to obtain a voltage difference based on the difference between the third charging voltage and the first charging voltage; a charging circuit switching module, used to switch the first charging circuit to the second charging circuit and charge the vehicle battery based on the second charging circuit in response to the voltage difference being less than a preset threshold and the second circuit being in normal operation; and a charging stop module, used to control the vehicle battery to stop charging in response to the voltage difference being less than a preset threshold and the second circuit being in abnormal operation.

[0020] Optionally, in response to the preset charging circuit being the second charging circuit, the battery charging module further includes: a target voltage determining unit, used to boost the first charging voltage based on the boost converter and the calibrated voltage range to obtain a target charging voltage; a charging power determining unit, used to determine the target charging power by the minimum value among the current first charging power of the vehicle battery, the second charging power of the charging device, and the third charging power of the boost converter; and a battery charging unit, used to control the boost converter to output power to the vehicle battery based on the target charging voltage and the target charging power, so as to charge the vehicle battery.

[0021] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the above-described vehicle battery charging methods.

[0022] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes any of the above-described vehicle battery charging methods during runtime.

[0023] According to another aspect of the present invention, a vehicle is also provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform any of the above-described vehicle battery charging methods.

[0024] In this embodiment of the invention, in response to the detection of a connection between the vehicle battery and the charging device, a first charging voltage of the charging device is obtained; the first charging voltage is compared with a second charging voltage of the vehicle battery to obtain a first comparison result; based on the first comparison result and the loop state of a preset charging circuit, the vehicle battery is charged according to the preset charging circuit. By performing insulation detection on the charging device when the connection between the vehicle battery and the charging device is detected, the maximum voltage that the charging device can output with high accuracy, i.e., the first charging voltage, can be obtained, which can ensure the accuracy of subsequent selection of the charging circuit. Then, the first charging voltage is compared with the maximum voltage that the vehicle battery can withstand during normal charging, i.e., the second charging voltage. Finally, based on the comparison result and the loop state of the preset charging circuit, a suitable charging circuit is selected to charge the vehicle battery, so as to reduce the impact of incorrect circuits on the charging efficiency of the vehicle battery, thereby improving the charging efficiency of the vehicle battery and solving the technical problem of low efficiency when charging vehicle batteries in related technologies. Attached Figure Description

[0025] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0026] Figure 1 This is a flowchart illustrating a vehicle battery charging method according to an embodiment of the present invention;

[0027] Figure 2 This is a structural block diagram of a vehicle battery charging system according to an embodiment of the present invention;

[0028] Figure 3 This is a structural block diagram of a vehicle battery charging circuit shown in an embodiment of the present invention;

[0029] Figure 4 This is a structural block diagram of a vehicle battery charging device according to an embodiment of the present invention. Detailed Implementation

[0030] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0031] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this invention are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of the invention described herein can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0032] Example 1

[0033] According to an embodiment of the present invention, a method for charging a vehicle battery is provided. It should be noted that the steps shown in the flowchart in the accompanying drawings can be executed in a computer system such as a set of computer-executable instructions. Furthermore, although a logical order is shown in the flowchart, in some cases, the steps shown or described may be executed in a different order than that shown here.

[0034] Figure 1 This is a flowchart illustrating a vehicle battery charging method according to an embodiment of the present invention, such as... Figure 1 As shown, the method includes the following steps:

[0035] In step S102, in response to detecting the connection between the vehicle battery and the charging device, the first charging voltage of the charging device is obtained.

[0036] The first charging voltage is used to characterize the maximum output voltage of the charging device during the insulation test.

[0037] In one optional embodiment, considering that most vehicles currently use high-voltage systems with operating voltages above 800V, while most charging devices use low-voltage platforms with output voltages typically below 800V, directly charging high-voltage vehicle batteries with low-voltage platforms may result in low charging efficiency or even damage to the vehicle battery. Therefore, to improve the efficiency of charging high-voltage vehicle batteries with low-voltage charging devices, the battery charging system can actively identify whether the charging voltage of the charging device can meet the charging requirements of the vehicle battery. Thus, when the battery charging system detects a connection between the charging device and the vehicle battery, it may not charge the vehicle battery immediately. Instead, it may first detect the maximum charging voltage achievable by the charging device and determine whether this voltage meets the charging requirements of the vehicle battery. If it does, it indicates that the current charging efficiency of the vehicle battery using the charging device is high; if it does not, it indicates that the current charging efficiency of the vehicle battery using the charging device is low.

[0038] However, considering that the maximum output voltage of the charging device may change due to environmental factors, in order to accurately obtain the first charging voltage of the charging device, the battery charging system can perform insulation testing on the charging device and monitor the maximum output voltage that the charging device can output during the insulation testing process in real time. This maximum output voltage can be the first charging voltage mentioned above.

[0039] In one alternative embodiment, a voltage detection device can be deployed at the charging port of the vehicle battery, and the first charging voltage mentioned above can be obtained using the voltage detection device.

[0040] In one optional embodiment, to ensure data transmission efficiency, the communication protocol between the battery charging system and the charging device can be the standard GBT279t0 communication protocol. The battery charging system can communicate with the charging device via CAN (Controller Area Network) in the form of BHM messages (a message sent from the vehicle to the charging device).

[0041] Step S104: Compare the first charging voltage with the second charging voltage of the vehicle battery to obtain the first comparison result.

[0042] The second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging.

[0043] In one optional embodiment, to avoid the charging voltage output by the charging device failing to meet the charging requirements of the vehicle battery, after obtaining the first charging voltage through insulation testing of the charging device, the battery charging system can further obtain the maximum charging voltage that the vehicle battery can withstand during normal charging, i.e., the aforementioned second charging voltage. Then, the first charging voltage and the second charging voltage are compared to obtain a comparison result. This comparison result reflects whether the charging voltage output by the charging device can meet the vehicle's charging requirements. For example, if the first charging voltage is greater than or equal to the second charging voltage, it can be considered that the voltage output by the charging device can meet the vehicle battery's charging requirements. When the battery charging system directly uses the charging voltage output by the charging device to charge the vehicle battery, the charging efficiency is high. If the first charging voltage is less than the second charging voltage, it can be considered that the charging voltage output by the charging device does not meet the vehicle battery's charging requirements. When the battery charging system directly uses the charging voltage output by the charging device to charge the vehicle, the charging efficiency may be low.

[0044] Step S106: Based on the first comparison result and the circuit state of the preset charging circuit, the vehicle battery is charged according to the preset charging circuit.

[0045] The circuit status is used to characterize whether the preset charging circuit can operate normally.

[0046] The aforementioned preset charging circuit can refer to a circuit used to connect the charging device and the vehicle battery so that the vehicle battery can be charged using the charging voltage output by the charging device.

[0047] In one optional embodiment, considering that different first comparison results may correspond to different charging efficiencies, multiple different charging circuits corresponding to different comparison results can be set up to improve the efficiency of charging the vehicle battery using the charging device. However, considering that charging circuits may be damaged during actual use, if the corresponding charging circuit is selected only according to a list when charging the vehicle battery using the charging device, charging failures may occur. Therefore, after obtaining the aforementioned first comparison result, the battery charging system can further combine the circuit state of the preset charging circuit to charge the vehicle battery.

[0048] In this embodiment of the invention, in response to the detection of a connection between the vehicle battery and the charging device, a first charging voltage of the charging device is obtained; the first charging voltage is compared with a second charging voltage of the vehicle battery to obtain a first comparison result; based on the first comparison result and the loop state of a preset charging circuit, the vehicle battery is charged according to the preset charging circuit. By performing insulation detection on the charging device when the connection between the vehicle battery and the charging device is detected, the maximum voltage that the charging device can output with high accuracy, i.e., the first charging voltage, is obtained. Then, the first charging voltage is compared with the maximum voltage that the vehicle battery can withstand during normal charging, i.e., the second charging voltage. Finally, based on the comparison result and the loop state of the preset charging circuit, a suitable charging circuit is selected to charge the vehicle battery, so as to reduce the impact of incorrect circuits on the charging efficiency of the vehicle battery, thereby improving the charging efficiency of the vehicle battery and solving the technical problem of low efficiency when charging vehicle batteries in related technologies.

[0049] Optionally, obtaining the first charging voltage of the charging device includes: obtaining the rated charging voltage of the charging device; determining the minimum value of the rated charging voltage and the second charging voltage as the insulation detection voltage; and performing insulation detection on the charging device based on the insulation detection voltage to obtain the first charging voltage.

[0050] In one optional embodiment, the insulation of the charging device can be tested using the rated voltage of the charging device. Generally, the rated voltage of the charging device is 500V, 750V, or 50V.

[0051] Specifically, the battery charging system can first obtain the rated voltage of the charging device, then compare the rated voltage with the second charging voltage of the vehicle battery, and determine the minimum value of the two as the insulation detection voltage for insulation detection of the charging device. Finally, the insulation detection voltage is used to perform insulation detection on the charging device to obtain the first charging voltage of the charging device.

[0052] Optionally, the preset charging circuit includes at least: a first charging circuit and a second charging circuit, wherein the first charging circuit includes at least: a vehicle battery and a first circuit switch, the second charging circuit includes at least: a vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit.

[0053] In one optional embodiment, the preset charging circuit for charging the vehicle battery may include at least a first charging circuit and a second charging circuit. The first charging circuit is used when the charging voltage of the charging device meets the charging requirements of the vehicle battery, and the second charging circuit is used when the charging voltage of the charging device does not meet the charging requirements of the vehicle battery. The first charging circuit may include at least a vehicle battery and a first circuit switch, and the second charging circuit may include at least a vehicle battery, a second circuit switch, and a boost converter. Generally, the first and second circuit switches are normally open, and the boost converter is used to increase the received charging voltage output by the charging device. Corresponding to the preset charging circuit, the preset circuit states may include a first circuit state corresponding to the first charging circuit and a second charging state corresponding to the second charging circuit.

[0054] Optionally, based on the first comparison result and the loop state of the preset charging loop, the vehicle battery is charged according to the preset charging loop, including: in response to the first comparison result being that the first charging voltage is greater than or equal to the second charging voltage, obtaining the first loop state and the second loop state; in response to the first loop state being that the first charging loop is operating normally, charging the vehicle battery according to the first charging loop; in response to the first loop state being that the first charging loop is operating abnormally and the second loop state being that the second charging loop is operating normally, charging the vehicle battery according to the second charging loop.

[0055] In one optional embodiment, when selecting a charging circuit for charging the vehicle battery based on the first comparison result and the circuit state of a preset circuit, the charging circuit that can be used to charge the vehicle battery can first be determined based on the first comparison result, and then the target charging circuit can be determined based on the circuit state of the charging circuit. Specifically, when the first comparison result is that the first charging voltage is greater than or equal to the second charging voltage, it can be considered that the charging voltage output by the charging device meets the charging requirements of the vehicle battery. At this time, the selectable charging circuits include the aforementioned first charging circuit and second charging circuit. Then, the battery charging system can obtain the first circuit state of the first charging circuit and the second circuit state of the second charging circuit. If the first circuit state indicates that the first charging circuit can operate normally, the first charging circuit can be directly determined as the target charging circuit to charge the vehicle battery; if the first circuit state indicates that the first charging circuit is operating abnormally, and the second circuit state indicates that the second charging circuit can operate normally, the second charging circuit can be determined as the target charging circuit to charge the vehicle battery; if the first circuit state indicates that the first charging circuit is operating abnormally, and the second circuit state indicates that the second charging circuit is abnormal, the battery charging system can output a prompt message to the user, reminding the user that the vehicle battery cannot be charged normally.

[0056] Optionally, the method further includes: in response to a first comparison result that the first charging voltage is less than the second charging voltage, obtaining the current actual voltage of the vehicle battery; comparing the first charging voltage and the actual voltage to obtain a second comparison result; in response to a second comparison result that the first charging voltage is greater than or equal to the actual voltage and the first circuit state is that the first charging circuit is operating normally, charging the vehicle battery according to the first charging circuit; in response to a second comparison result that the first charging voltage is less than the actual voltage and the second circuit state is that the second charging circuit is operating normally, charging the vehicle battery according to the second charging circuit.

[0057] In one optional embodiment, if the first comparison result is that the first charging voltage is less than the second charging voltage, considering that the actual voltage corresponding to the charging demand of the vehicle battery is usually lower than the second charging voltage of the vehicle battery, the battery charging system can further obtain the current actual voltage of the vehicle battery, and then compare the first charging voltage of the charging device with the actual voltage to obtain the second comparison result. If the second comparison result is that the first charging voltage is greater than or equal to the actual voltage, it can be considered that the charging voltage output by the charging device meets the charging demand of the vehicle battery. At this time, if the first circuit state is that the first charging circuit can operate normally, the first charging circuit can be determined as the target charging circuit to charge the vehicle battery. If the first circuit state indicates that the first charging circuit is malfunctioning, and the second circuit state indicates that the second charging circuit is functioning normally, then the second charging circuit can be identified as the target charging circuit to charge the vehicle battery. If the second comparison result indicates that the first charging voltage is less than the actual voltage mentioned above, it can be considered that the charging power output by the charging device does not meet the charging requirements of the vehicle battery. In this case, if the second charging state indicates that the second charging circuit is functioning normally, then the second charging circuit can be identified as the target charging circuit to charge the vehicle battery. If the second charging state indicates that the second charging circuit is malfunctioning, and the first charging state indicates that the first charging circuit is functioning normally, then the first charging circuit can be identified as the target charging circuit to charge the vehicle battery.

[0058] Optionally, in response to the preset charging circuit being the first charging circuit, charging the vehicle battery according to the preset charging circuit includes: determining a charging voltage range based on a first charging voltage and the actual voltage of the vehicle battery; and charging the vehicle battery according to the first charging circuit based on the charging voltage range.

[0059] In one optional embodiment, when charging the vehicle battery using the first charging circuit, the battery charging system can first determine a charging voltage range based on the current actual voltage of the vehicle battery and the first charging voltage of the charging device. The charging device can output voltage according to the charging voltage range, and the battery charging system directly uses the voltage output by the charging device to charge the vehicle battery to ensure charging efficiency and avoid damage to the vehicle battery caused by excessive charging voltage output by the charging device, thereby improving the battery life of the vehicle battery.

[0060] Optionally, the method further includes: in response to detecting that the vehicle battery has started charging, acquiring a third charging voltage at the charging interface of the vehicle battery; obtaining a voltage difference based on the difference between the third charging voltage and the first charging voltage; in response to the voltage difference being less than a preset threshold and the second circuit being in normal operation, switching the first charging circuit to the second charging circuit and charging the vehicle battery based on the second charging circuit; and in response to the voltage difference being less than the preset threshold and the second circuit being in abnormal operation, controlling the vehicle battery to stop charging.

[0061] In one optional embodiment, when it is determined that the vehicle battery is being charged according to the first charging circuit and the start of charging of the vehicle battery is detected, the battery charging system can obtain the third charging voltage at the vehicle battery charging interface in real time, that is, the actual voltage of the vehicle battery during the charging process, and calculate the voltage difference between the third charging voltage and the first charging voltage. If the voltage difference is less than a preset threshold, such as 30V, and the second circuit status is that the second charging circuit can operate normally, the target charging circuit can be switched from the first charging circuit to the second charging circuit, and the vehicle battery can continue to be charged according to the second charging circuit until the aforementioned third charging voltage reaches the first charging voltage. If the voltage difference is less than the preset threshold, but the second circuit status is that the second charging circuit is operating abnormally, the first circuit switch in the first charging circuit can be disconnected to control the vehicle battery to stop charging and send a vehicle charging abnormality reminder to the user.

[0062] Optionally, in response to the preset charging circuit being a second charging circuit, charging the vehicle battery according to the preset charging circuit includes: boosting the first charging voltage based on the boost converter and the calibrated voltage range to obtain a target charging voltage; determining the target charging power by the minimum value among the current first charging power of the vehicle battery, the second charging power of the charging device, and the third charging power of the boost converter; and controlling the boost converter to output power to the vehicle battery based on the target charging voltage and the target charging power to charge the vehicle battery.

[0063] The aforementioned calibrated charging range may refer to a range consisting of multiple voltages that result in faster charging efficiency for the vehicle battery.

[0064] In one optional embodiment, when charging the vehicle battery according to the second charging circuit, the first charging voltage can be boosted using the boost converter in the second charging circuit to obtain a target charging voltage within the calibrated voltage range. Then, the first charging power of the vehicle battery, the second charging power output by the charging device, and the third charging power output by the boost converter are determined at the target charging voltage. These three charging powers are compared, and the minimum value is selected as the target charging power. Finally, the boost converter is controlled to output power to the vehicle battery according to the target charging power and the target charging voltage to charge the vehicle battery.

[0065] For ease of understanding, Figure 2 This is a structural block diagram of a vehicle battery charging system according to an embodiment of the present invention, such as... Figure 2 As shown, the vehicle charging system may include: a vehicle battery 201, a boost converter 202, a voltage detection device 202, a first circuit switch 204, a second circuit switch 205, a charging control device 206, and a charging device 207. The charging control device 206 is used to execute control commands issued by the battery charging system, such as closing the first circuit switch 204, closing the second circuit switch 204, etc.

[0066] Figure 3 This is a structural block diagram of a vehicle battery charging circuit shown in a basic embodiment of the present invention, such as... Figure 4 As shown, vehicle batteries currently require relatively high charging voltages, generally in the range of 700V-850V. However, the charging equipment used to charge vehicle batteries can only provide voltages in the range of 300V-950V. This means that there may be situations where the charging voltage output by the charging equipment does not meet the charging requirements of the vehicle battery. Therefore, in order to improve the charging efficiency of vehicle batteries, [further measures can be taken]. Figure 3 The circuit uses the charging voltage output by the charging device to charge the vehicle battery.

[0067] Example 2

[0068] According to another aspect of the embodiments of the present invention, corresponding to the above-described vehicle battery charging method embodiments, this specification also provides a vehicle battery charging device, please refer to... Figure 4 , Figure 4 This is a structural block diagram of a vehicle battery charging device according to an embodiment of the present invention, such as... Figure 4As shown, the device includes: a voltage detection module 402, used to acquire a first charging voltage of the charging device in response to detecting a connection between the vehicle battery and the charging device, wherein the first charging voltage is used to characterize the maximum output voltage of the charging device during insulation testing; a voltage comparison module 404, used to compare the first charging voltage with a second charging voltage of the vehicle battery to obtain a first comparison result, wherein the second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging; and a battery charging module 406, used to charge the vehicle battery according to a preset charging circuit based on the first comparison result and the circuit state of a preset charging circuit, wherein the circuit state is used to characterize whether the preset charging circuit can operate normally.

[0069] Optionally, the voltage detection module includes: a voltage acquisition unit for acquiring the rated charging voltage of the charging device; a voltage determination unit for determining the minimum value of the rated charging voltage and the second charging voltage as the insulation detection voltage; and a voltage detection unit for performing insulation detection on the charging device based on the insulation detection voltage to obtain a first charging voltage.

[0070] Optionally, the preset charging circuit includes at least: a first charging circuit and a second charging circuit, wherein the first charging circuit includes at least: a vehicle battery and a first circuit switch, the second charging circuit includes at least: a vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit.

[0071] Optionally, the battery charging module includes: a status acquisition unit, configured to acquire a first circuit status and a second circuit status in response to a first comparison result indicating that a first charging voltage is greater than or equal to a second charging voltage; a first charging unit, configured to charge the vehicle battery according to the first charging circuit in response to a first circuit status indicating that the first charging circuit is operating normally; and a second charging unit, configured to charge the vehicle battery according to the second charging circuit in response to a first circuit status indicating that the first charging circuit is operating abnormally and a second circuit status indicating that the second charging circuit is operating normally.

[0072] Optionally, the device further includes: an actual voltage acquisition module, configured to acquire the current actual voltage of the vehicle battery in response to a first comparison result that the first charging voltage is less than the second charging voltage; compare the first charging voltage and the actual voltage to obtain a second comparison result; a first charging module, configured to charge the vehicle battery according to the first charging circuit in response to a second comparison result that the first charging voltage is greater than or equal to the actual voltage and the first circuit state is that the first charging circuit is operating normally; and a second charging module, configured to charge the vehicle battery according to the second charging circuit in response to a second comparison result that the first charging voltage is less than the actual voltage and the second circuit state is that the second charging circuit is operating normally.

[0073] Optionally, in response to the preset charging circuit being the first charging circuit, the battery charging module further includes: a range determining unit, used to determine a charging voltage range based on the first charging voltage and the actual voltage of the vehicle battery; and a third charging unit, used to charge the vehicle battery according to the first charging circuit based on the charging voltage range.

[0074] Optionally, the device further includes: a fourth voltage acquisition module, used to acquire a third charging voltage at the charging interface of the vehicle battery in response to detecting that the vehicle battery has started charging; a voltage difference determination module, used to obtain a voltage difference based on the difference between the third charging voltage and the first charging voltage; a charging circuit switching module, used to switch the first charging circuit to the second charging circuit and charge the vehicle battery based on the second charging circuit in response to the voltage difference being less than a preset threshold and the second circuit being in normal operation; and a charging stop module, used to control the vehicle battery to stop charging in response to the voltage difference being less than a preset threshold and the second circuit being in abnormal operation.

[0075] Optionally, in response to the preset charging circuit being the second charging circuit, the battery charging module further includes: a target voltage determining unit, used to boost the first charging voltage based on the boost converter and the calibrated voltage range to obtain a target charging voltage; a charging power determining unit, used to determine the target charging power by the minimum value among the current first charging power of the vehicle battery, the second charging power of the charging device, and the third charging power of the boost converter; and a battery charging unit, used to control the boost converter to output power to the vehicle battery based on the target charging voltage and the target charging power, so as to charge the vehicle battery.

[0076] Example 3

[0077] According to another aspect of the present invention, a computer-readable storage medium is also provided, the computer-readable storage medium including a stored program, wherein, when the program is executed, it controls the device where the computer-readable storage medium is located to perform any of the above-described vehicle battery charging methods.

[0078] Example 4

[0079] According to another aspect of the present invention, a processor is also provided, which is used to run a program, wherein the program executes any of the above-described vehicle battery charging methods during runtime.

[0080] Example 5

[0081] According to another aspect of the present invention, a vehicle is also provided, comprising: at least one processor; and a memory communicatively connected to the at least one processor; wherein the memory stores instructions executable by the at least one processor, the instructions being executed by the at least one processor to enable the at least one processor to perform any of the above-described vehicle battery charging methods. Optionally,

[0082] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0083] In the above embodiments of the present invention, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions of other embodiments.

[0084] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. The device embodiments described above are merely illustrative; for example, the division of units can be a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the displayed or discussed mutual couplings, direct couplings, or communication connections may be through some interfaces; indirect couplings or communication connections between units or modules may be electrical or other forms.

[0085] The units described as separate components may or may not be physically separate. The components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple units. Some or all of the units can be selected to achieve the purpose of this embodiment according to actual needs.

[0086] Furthermore, the functional units in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or as a software functional unit.

[0087] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of the present invention. The aforementioned storage medium includes various media capable of storing program code, such as USB flash drives, read-only memory (ROM), random access memory (RAM), portable hard drives, magnetic disks, or optical disks.

[0088] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principle of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A method for charging a vehicle battery, characterized in that, include: In response to the detection of a connection between the vehicle battery and the charging device, a first charging voltage of the charging device is acquired, wherein the first charging voltage is used to characterize the maximum output voltage of the charging device during the insulation detection process of the charging device; The first charging voltage and the second charging voltage of the vehicle battery are compared to obtain a first comparison result, wherein the second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging, and the first comparison result is used to indicate whether the charging voltage output by the charging device meets the charging requirements of the vehicle. Based on the first comparison result and the loop state of the preset charging circuit, the vehicle battery is charged according to the preset charging circuit. The loop state is used to characterize whether the preset charging circuit can operate normally. The preset charging circuit is used to connect the charging device and the vehicle battery. The loop state includes at least: the first loop state corresponding to the first charging circuit and the second loop state corresponding to the second charging circuit. Wherein, the first charging circuit includes at least: the vehicle battery and a first circuit switch, the second charging circuit includes at least: the vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit; The process of charging the vehicle battery according to the preset charging circuit, based on the first comparison result and the circuit state of the preset charging circuit, includes: In response to the first comparison result being that the first charging voltage is greater than or equal to the second charging voltage, the first circuit state and the second circuit state are obtained; In response to the first circuit state being that the first charging circuit is operating normally, the vehicle battery is charged according to the first charging circuit; In response to the first circuit state being an abnormal operation of the first charging circuit and the second circuit state being a normal operation of the second charging circuit, the vehicle battery is charged according to the second charging circuit.

2. The method according to claim 1, characterized in that, Obtaining the first charging voltage of the charging device includes: Obtain the rated charging voltage of the charging device; The minimum value of the rated charging voltage and the second charging voltage is determined as the insulation detection voltage; The first charging voltage is obtained by performing insulation testing on the charging device based on the insulation detection voltage.

3. The method according to claim 1, characterized in that, The method further includes: In response to the first comparison result indicating that the first charging voltage is less than the second charging voltage, the current actual voltage of the vehicle battery is obtained; The first charging voltage and the actual voltage are compared to obtain a second comparison result; In response to the second comparison result being that the first charging voltage is greater than or equal to the actual voltage, and the first circuit state being that the first charging circuit is operating normally, the vehicle battery is charged according to the first charging circuit; In response to the second comparison result that the first charging voltage is less than the actual voltage, and the second circuit status that the second charging circuit is operating normally, the vehicle battery is charged according to the second charging circuit.

4. The method according to claim 1, characterized in that, In response to the preset charging circuit being a first charging circuit, charging the vehicle battery according to the preset charging circuit includes: The charging voltage range is determined based on the first charging voltage and the actual voltage of the vehicle battery; The vehicle battery is charged according to the first charging circuit based on the charging voltage range.

5. The method according to claim 4, characterized in that, The method further includes: In response to detecting that the vehicle battery has started charging, a third charging voltage at the charging interface of the vehicle battery is acquired; The voltage difference is obtained based on the difference between the third charging voltage and the first charging voltage; In response to the voltage difference being less than a preset threshold and the second circuit being in normal operation, the first charging circuit is switched to the second charging circuit, and the vehicle battery is charged based on the second charging circuit; In response to the voltage difference being less than a preset threshold and the second circuit status being an abnormal operation of the second charging circuit, the vehicle battery is controlled to stop charging.

6. The method according to claim 1, characterized in that, In response to the preset charging circuit being a second charging circuit, charging the vehicle battery according to the preset charging circuit includes: Based on the boost converter and the calibrated voltage range, the first charging voltage is boosted to obtain the target charging voltage; The target charging power is determined by the minimum value among the current first charging power of the vehicle battery, the second charging power of the charging equipment, and the third charging power of the boost converter. Based on the target charging voltage and the target charging power, the boost converter is controlled to output power to the vehicle battery to charge the vehicle battery.

7. A vehicle battery charging device, characterized in that, include: A voltage detection module is used to obtain a first charging voltage of the charging device in response to the detection of a connection between the vehicle battery and the charging device, wherein the first charging voltage is used to characterize the maximum output voltage of the charging device during the insulation detection process of the charging device; A voltage comparison module is used to compare the first charging voltage and the second charging voltage of the vehicle battery to obtain a first comparison result, wherein the second charging voltage is used to characterize the maximum voltage that the vehicle battery can withstand during normal charging, and the first comparison result is used to indicate whether the charging voltage output by the charging device meets the charging requirements of the vehicle. A battery charging module is used to charge the vehicle battery according to the preset charging circuit based on the first comparison result and the circuit state of the preset charging circuit. The circuit state is used to characterize whether the preset charging circuit can operate normally. The preset charging circuit is used to connect the charging device and the vehicle battery. The circuit state includes at least: a first circuit state corresponding to a first charging circuit and a second circuit state corresponding to a second charging circuit. Wherein, the first charging circuit includes at least: the vehicle battery and a first circuit switch, the second charging circuit includes at least: the vehicle battery, a second circuit switch and a boost converter, the boost converter is used to boost the first charging voltage, and the circuit state includes at least: the first circuit state corresponding to the first charging circuit and the second circuit state corresponding to the second charging circuit; The battery charging module is configured to: in response to the first comparison result being that the first charging voltage is greater than or equal to the second charging voltage, acquire the first circuit state and the second circuit state; in response to the first circuit state being that the first charging circuit is operating normally, charge the vehicle battery according to the first charging circuit; in response to the first circuit state being that the first charging circuit is operating abnormally and the second circuit state being that the second charging circuit is operating normally, charge the vehicle battery according to the second charging circuit.

8. A vehicle comprising: At least one processor; as well as A memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor to enable the at least one processor to perform the vehicle battery charging method according to any one of claims 1 to 6.

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