A battery charging protection method, device, charger and storage medium

Abstract

This application relates to the field of chargers, and in particular, to a battery charging protection method, device, charger, and storage medium. The method includes: when it is detected that a self-service charging device starts charging an electric vehicle, detecting whether the vehicle owner's location information is received; if the vehicle owner's location information is not received, determining whether the battery of the electric vehicle is connected to the self-service charging device; if so, repeatedly executing the steps of detecting whether the vehicle owner's location information is received, and if the vehicle owner's location information is not received, determining whether the plug of the charger is connected to the self-service charging device, until a first preset condition is met, where the first preset condition includes receiving the vehicle owner's location information or detecting that the plug of the charger is not connected to the self-service charging device; wherein, if it is detected that the battery of the electric vehicle is not connected to the self-service charging device, a charging cancellation instruction is generated and sent to the self-service charging device to cause the self-service charging device to stop power supply. This application has the effect of preventing people from stealing electricity.

Description

Technical Field

[0001] The present application relates to the field of chargers, and in particular, to a battery charging protection method, device, charger and storage medium. Background Art

[0002] With the concept of low-carbon environmental protection, traveling by environmentally friendly means of transportation such as electric vehicles and bicycles has become the majority choice of people. An electric vehicle is a tool driven by consuming electric energy. The electric energy stored in the battery is used to drive the electric vehicle. When the electric energy stored in the battery is used up, it needs to be charged using a charger.

[0003] Self-service charging devices have also appeared in people's lives, greatly facilitating the use of electric vehicles by people. When the battery needs to be charged, the user can scan the QR code on the self-service charging device to enter the self-service charging platform to pay the fee, and then connect the battery to the self-service charging device to automatically start charging.

[0004] Generally, the charging time of the battery is relatively long, and users usually choose to charge at night. After the user's battery starts charging and leaves, other people may unplug the plug from the user's charging port in the middle of the night and replace it with the charging port of their own battery to charge their own battery for the purpose of stealing electricity. Therefore, how to prevent people from stealing electricity to reduce user losses has become a key issue. Summary of the Invention

[0005] In order to prevent people from stealing electricity, the present application provides a battery charging protection method, device, charger and storage medium.

[0006] In a first aspect, the present application provides a battery charging protection method, adopting the following technical solution:

[0007] A battery charging protection method, the method comprising:

[0008] When it is detected that the self-service charging device starts charging the electric vehicle, detect whether the owner's location information is received;

[0009] If the owner's location information is not received, determine whether the battery of the electric vehicle is connected to the self-service charging device;

[0010] If so, repeatedly execute the step of detecting whether the owner's location information is received. If the owner's location information is not received, determine whether the battery of the electric vehicle is connected to the self-service charging device until a first preset condition is met. The first preset condition includes receiving the owner's location information or detecting that the plug of the charger is not connected to the self-service charging device;

[0011] Wherein, if it is detected that the battery of the electric vehicle is not connected to the self-service charging device, a charging cancellation instruction is generated and sent to the self-service charging device, so that the self-service charging device stops power supply.

[0012] By adopting the above technical solution, when the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user leaves, that is, to detect whether the vehicle owner's location information is received. When the user leaves, that is, when the vehicle owner's location information is not received, it starts to continuously detect whether there is an abnormal state such as the charger falling off or an abnormal person replacing the charger. When it is detected that the battery of the electric vehicle is not connected to the self-service charging device, it indicates an abnormal state. In order to effectively prevent people from stealing electricity, at this time, the self-service charging device will be controlled to stop power supply, which is beneficial to reducing the user's losses.

[0013] In a possible implementation manner, the detection of whether the battery of the electric vehicle is connected to the self-service charging device includes any one of the following:

[0014] Obtain the power of the battery, and judge whether the battery of the electric vehicle is connected to the self-service charging device according to the power of the battery;

[0015] Judge whether the plug of the charger is connected to the self-service charging device according to whether a trigger signal is obtained, so as to judge whether the battery of the electric vehicle is connected to the self-service charging device.

[0016] By adopting the above technical solution, it is possible to judge whether the self-service charging device is connected to the battery according to the power of the battery, and it is also possible to judge whether the self-service charging device is connected to the battery according to whether a trigger signal is received, so as to judge whether the charger has fallen off or whether an abnormal person has unplugged the charger of the electric vehicle, and then it is convenient to monitor the behavior of abnormal people.

[0017] In a possible implementation manner, after generating a charging cancellation instruction and sending it to the self-service charging device to make the self-service charging device stop power supply if it is detected that the battery of the electric vehicle is not connected to the self-service charging device, it further includes:

[0018] If it is detected that the charger is connected to the battery, obtain the power of the battery connected to the charger, and judge whether the power of the battery connected to the charger meets the second preset condition;

[0019] Wherein, the second preset condition includes: the difference between the power and the power obtained when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset interval;

[0020] If so, generate a resume charging instruction and send it to the self-service charging device to make the self-service charging device continue to supply power.

[0021] Through the above technical solution, when it is detected that the charger is connected to the battery, if the difference between the current battery level and the battery level obtained before it was detected that the battery was not connected to the self-service charging device is within a preset range, it indicates that the battery connected to the charger belongs to the user's electric vehicle battery, and the self-service charging device can continue to charge the electric vehicle battery.

[0022] In a possible implementation, the method further includes:

[0023] When the vehicle owner's location information is not received and it is not detected that the electric vehicle battery is connected to the self-service charging device, or when the vehicle owner's location information is received, determine whether the electric vehicle battery is fully charged according to the obtained battery level of the electric vehicle;

[0024] If it is fully charged, control the disconnection of the connection between the charger and the battery, generate a charging termination instruction, and send it to the self-service charging device to cause the self-service charging device to stop power supply.

[0025] By adopting the above technical solution, the battery level of the electric vehicle is detected to determine whether the electric vehicle battery is fully charged, and when it is fully charged, power supply to the battery is stopped, effectively reducing the occurrence of overcharging.

[0026] In a possible implementation, the method further includes:

[0027] Obtain the battery level change curve of the electric vehicle, where the battery level change curve is used to represent the change relationship between the battery level of the electric vehicle and the charging duration;

[0028] When the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device, feedback the battery level change curve to the vehicle owner's terminal device.

[0029] By adopting the above technical solution, by measuring the battery level change curve of the electric vehicle during charging and feeding back the battery level change curve to the vehicle owner's terminal device when the vehicle owner approaches the electric vehicle and the charger is disconnected from the self-service charging device, the vehicle owner can view the battery level change curve and learn about the charging situation during the charging period of the battery, so that in case of any abnormality, the vehicle owner can discover it in time, improving the user experience.

[0030] In a possible implementation, after obtaining the battery level change curve of the electric vehicle, it further includes:

[0031] According to the battery level change curve, determine the actual charging duration corresponding to when the battery level increases by a preset battery level value;

[0032] Determine whether the actual charging duration is within a preset standard duration range;

[0033] If it is not within the preset standard duration range, when the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device, generate a battery repair prompt message and feedback it to the vehicle owner's terminal device.

[0034] By adopting the above technical solution, according to the power change curve, determine whether the actual charging duration when the battery's power increases by a preset power value is within the preset standard duration range. If it is not within the preset standard duration range, it indicates that the battery of the electric vehicle may be abnormal, and a battery repair prompt message will be generated and feedback to the vehicle owner's terminal device, so that the vehicle owner can repair the battery in time to improve the safety of battery use.

[0035] In a possible implementation manner, when it is detected that the self-service charging device starts charging the electric vehicle, before detecting whether the vehicle owner's location information is received, it further includes:

[0036] When it is detected that the charger is connected to the self-service charging device, obtain the temperature information of the battery of the electric vehicle;

[0037] Determine whether the temperature of the battery of the electric vehicle exceeds a preset temperature threshold;

[0038] If it exceeds, generate a waiting instruction and send it to the self-service charging device, and repeatedly execute the steps of obtaining the temperature information of the battery of the electric vehicle and determining whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold until the temperature of the battery of the electric vehicle does not exceed the preset temperature threshold;

[0039] If it does not exceed the preset temperature threshold, generate a charging start instruction and send it to the self-service charging device to enable the self-service charging device to start charging.

[0040] By adopting the above technical solution, when it is detected that the charger is connected to the self-service charging device, it will be determined whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold. When it exceeds the preset temperature threshold, charging will be paused until the temperature of the battery is lower than the preset temperature threshold, and then a charging start instruction will be issued to drive the self-service charging device to charge, reducing the damage to the battery caused by charging at too high a battery temperature and further reducing the probability of battery explosion.

[0041] In a second aspect, the present application provides a battery charging protection device, adopting the following technical solution:

[0042] A battery charging protection device, the device includes:

[0043] A position detection module, configured to detect whether the vehicle owner's position information is received when it is detected that the self-service charging device starts to charge the electric vehicle;

[0044] A connection judgment module, configured to judge whether the battery of the electric vehicle is connected to the self-service charging device when the vehicle owner's position information is not received;

[0045] An abnormality detection module, configured to, when it is the case, repeatedly execute the step of detecting whether the vehicle owner's position information is received, and if the vehicle owner's position information is not received, judge whether the battery of the electric vehicle is connected to the self-service charging device, until a first preset condition is satisfied, where the first preset condition includes that the vehicle owner's position information is received or it is detected that the plug of the charger is not connected to the self-service charging device;

[0046] An abnormal power outage module, configured to generate a charging cancellation instruction and send it to the self-service charging device when it is detected that the battery of the electric vehicle is not connected to the self-service charging device, so that the self-service charging device stops power supply.

[0047] By adopting the above technical solution, when the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user leaves, that is, the position detection module detects whether the vehicle owner's position information is received. When the user leaves, that is, when the vehicle owner's position information is not received, the abnormality detection module continuously detects whether there is an abnormal state such as the charger falling off or an abnormal person replacing the charger. When the connection judgment module detects that the battery of the electric vehicle is not connected to the self-service charging device, it indicates an abnormal state. In order to effectively prevent people from stealing electricity, at this time, the abnormal power outage module will control the self-service charging device to stop power supply, thereby helping to reduce the user's loss.

[0048] In a possible implementation manner, when the connection judgment module detects whether the battery of the electric vehicle is connected to the self-service charging device, it specifically is configured to:

[0049] Obtain the power of the battery, and judge whether the battery of the electric vehicle is connected to the self-service charging device according to the power of the battery; or,

[0050] Judge whether the plug of the charger is connected to the self-service charging device according to whether a trigger signal is obtained, so as to judge whether the battery of the electric vehicle is connected to the self-service charging device.

[0051] In another possible implementation manner, the device further includes:

[0052] A condition judgment module, configured to obtain the power of the battery connected to the charger and judge whether the power of the battery connected to the charger meets a second preset condition when it is detected that the charger is connected to the battery;

[0053] Among them, the second preset condition includes: the difference between the power and the power obtained when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset range;

[0054] The charging recovery module is configured to, when it is the case, generate a recovery charging instruction and send it to the self-service charging device so that the self-service charging device continues to supply power.

[0055] In another possible implementation manner, the device further includes:

[0056] The power detection module is configured to, when the vehicle owner's location information is not received and it is not detected that the battery of the electric vehicle is connected to the self-service charging device, or when the vehicle owner's location information is received, determine whether the battery of the electric vehicle is fully charged according to the obtained power of the battery of the electric vehicle;

[0057] The full charge power-off module is configured to, when it is in a fully charged state, control the disconnection of the connection between the charger and the battery, generate a charging termination instruction, and send it to the self-service charging device so that the self-service charging device ends the power supply.

[0058] In another possible implementation manner, the device further includes:

[0059] The power acquisition module is configured to acquire the power change curve of the battery of the electric vehicle, and the power change curve is used to characterize the change relationship between the power of the electric vehicle and the charging duration;

[0060] The power feedback module is configured to, when the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device, feedback the power change curve to the vehicle owner's terminal device.

[0061] In another possible implementation manner, the device further includes:

[0062] The duration determination module is configured to determine the actual charging duration corresponding to when the power of the battery increases by a preset power value according to the power change curve;

[0063] The duration judgment module is configured to judge whether the actual charging duration is within a preset standard duration range;

[0064] The maintenance feedback module is configured to, when it is not within the preset standard duration range, when the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device, generate a battery maintenance prompt message and feedback it to the vehicle owner's terminal device.

[0065] In another possible implementation manner, the device further includes:

[0066] A temperature acquisition module, configured to acquire the temperature information of the battery of the electric vehicle when it detects that the charger is connected to the self-service charging device;

[0067] A temperature judgment module, configured to judge whether the temperature of the battery of the electric vehicle exceeds a preset temperature threshold;

[0068] A waiting module, configured to generate a waiting instruction and send it to the self-service charging device when the temperature exceeds, and repeatedly execute the steps of acquiring the temperature information of the battery of the electric vehicle and judging whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold until the temperature of the battery of the electric vehicle does not exceed the preset temperature threshold;

[0069] A start determination module, configured to generate a charging start instruction and send it to the self-service charging device when the preset temperature threshold is not exceeded, so that the self-service charging device starts charging.

[0070] In a third aspect, the present application provides a charger, adopting the following technical solution:

[0071] A charger, which includes:

[0072] At least one processor;

[0073] A memory;

[0074] At least one application program, wherein at least one application program is stored in the memory and is configured to be executed by at least one processor, and the at least one application program is configured to: execute the above battery charging protection method.

[0075] In a fourth aspect, the present application provides a computer-readable storage medium, adopting the following technical solution:

[0076] A computer-readable storage medium, including: a computer program stored therein that can be loaded and executed by a processor to execute the above battery charging protection method.

[0077] In summary, the present application includes the following beneficial technical effects:

[0078] When the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user leaves, that is, detects whether the vehicle owner's location information is received. When the user leaves, that is, when the vehicle owner's location information is not received, it starts to continuously detect whether an abnormal state such as the charger falling off or an abnormal person replacing the charger occurs. When it detects that the battery of the electric vehicle is not connected to the self-service charging device, it indicates an abnormal state. In order to effectively prevent people from stealing electricity, at this time, the self-service charging device will be controlled to stop power supply, which is beneficial to reducing the user's loss. Description of the Drawings

[0079] Figure 1It is the circuit diagram of the high-frequency switching power supply charging circuit in the embodiment of the present application;

[0080] Figure 2 It is the schematic flowchart of the battery charging protection method in the embodiment of the present application;

[0081] Figure 3 It is the block diagram of the battery charging protection device in the embodiment of the present application;

[0082] Figure 4 It is the schematic diagram of the charger in the embodiment of the present application. Detailed implementation manners

[0083] The following will further describe the present application in detail with reference to the attached Figures 1-4 For a further detailed description of the present application.

[0084] To make the objectives, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Apparently, the described embodiments are some, but not all, of the embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without making creative efforts shall fall within the protection scope of the present application.

[0085] Under the advocacy of green travel, electric vehicles such as electric bicycles and electric cars have gradually become people's choices for travel. For electric bicycles or electric cars, they are all means of transportation that rely on the electricity stored in the internal battery to drive the vehicle.

[0086] When the battery of an electric bicycle runs out of power, a charger is needed to charge the battery of the electric bicycle. A charger is an indispensable part of an electric bicycle. As a device for charging a battery, the importance of a charger is self-evident.

[0087] Referring to Figure 1 , Figure 1 A high-frequency switching power supply charging circuit is provided. The high-frequency switching power supply charging circuit includes a charging module and a protection module. Among them, the charging module includes an input filtering unit, a rectifying unit, a buck unit, and an output filtering unit. Compared with a general linear power supply, a high-frequency switching power supply is a power supply that reduces losses and improves power conversion efficiency through high-frequency switches such as MOSFET or IGBT.

[0088] Specifically, the surge protection unit is used to connect to the municipal power supply and includes a fuse F1, a varistor MOV1, and a common mode inductor LF. One end of the fuse F1 is connected to the live wire of the municipal power supply, and the other end is connected to one end of the varistor MOV1. It is used to melt in time when a short-circuit current occurs to reduce the damage caused by the surge current flowing into the subsequent circuit through the charger to other components and even the battery of the electric vehicle. The other end of the varistor MOV1 is connected to the neutral wire of the municipal power supply and is used to respond in time when a surge voltage occurs to weaken the surge. The common mode inductor LF is used to attenuate the common mode current and filter out the low-frequency common mode components.

[0089] The rectification unit is used to connect to the surge protection unit and is used to connect to the buck unit. Among them, the rectification unit can be a full-bridge rectification module, which rectifies the municipal alternating current transmitted through the surge protection unit into direct current and outputs it to the buck unit.

[0090] The buck unit includes a transformer and a switch control sub-unit. Among them, the switch control sub-unit is used to control the primary coil of the transformer to be in a high-frequency switching state. By means of high-frequency switching, the electromagnetic conversion speed of the transformer is accelerated to reduce the energy stored inside, so that the circuit has a higher charging efficiency.

[0091] Specifically, the transformer includes a first primary coil, a second primary coil, and a secondary coil. Among them, the first primary coil is connected to the rectification unit and is used to receive the rectified direct current. After stepping down the rectified direct current, it is output through the secondary coil. A synchronous rectification power switch chip D3A is connected to the secondary coil, and a PWM controller U1 is connected to the second primary coil of the buck unit. Under the control of the PWM controller U1, the synchronous rectification power switch is in a high-speed switching state, which is conducive to improving the charging speed of the charger.

[0092] The output filter unit includes a polarized capacitor C9 and a polarized capacitor C13. The positive terminal of the polarized capacitor C9 is connected to the D terminal of the synchronous rectification power switch chip D3A and is used to receive the voltage output from the D terminal, stabilize the voltage and then output it to charge the battery.

[0093] Among them, the protection module is used to protect the safety of the charger and the battery. For example, when the positive and negative electrodes of the battery are reversely connected, the charger may be burned out, causing the components in the charger to heat up or even break down, and the battery may also be over-discharged, generating heat and even exploding. Therefore, in order to prevent the situation of reverse connection of the positive and negative electrodes of the battery, the protection module includes a reverse connection protection unit for the positive and negative electrodes. The reverse connection protection unit for the positive and negative electrodes includes a voltage comparator U5, a triode Q4, a resistor R30, a resistor R10, a resistor R21, a resistor R20, a resistor R18, a resistor R22, a zener diode DZD5, a diode D5, a light-emitting diode LED(R), a MOS transistor Q2, and a MOS transistor Q2A. Among them, the triode Q4 is an NPN-type triode, and the MOS transistors Q2 and Q2A are N-channel MOSFETs. Among them, the source electrode of the MOS transistor Q2 is connected to the positive terminal of the polar capacitor C9 of the output filtering unit, the drain electrode is used to connect to the positive electrode of the battery, the gate electrode is connected to the gate electrode of the MOS transistor Q2A, the source electrode of the MOS transistor Q2A is used to connect to the source electrode of the MOS transistor Q2, and the drain electrode is used to connect to the drain electrode of the MOS transistor Q2; the gate electrode is also used to connect to one end of the resistor R30, the other end of the resistor R30 is connected to the collector of the triode Q4, the emitter of the triode Q4 is grounded, the base of the triode Q4 is connected to the anode of the zener diode DZD5, the cathode of the zener diode DZD5 is connected to the drain electrode of the MOS transistor Q2, one end of the resistor R22 is connected to the collector of the triode Q4, and the other end of the resistor R22 is grounded; one end of the resistor R21 is connected to the collector of the triode Q4, and the other end is connected to pin 3 of the voltage comparator U5. Pin 3 is a positive input terminal of the voltage comparator U5. Pin 2 of the voltage comparator U5 is used to connect to the reference voltage. Pin 1 of the voltage comparator U5 is the output terminal, which is connected to the anode of the diode D5. The cathode of the diode D5 is connected to the anode of the light-emitting diode LED(R), and the cathode of the light-emitting diode LED(R) is grounded.

[0094] When the positive and negative electrodes of the battery are reversely connected, the triode Q4 is cut off, and the MOS transistors Q2 and Q2A will be turned off, that is, the current will not be able to pass through the path where the MOS transistors Q2 and Q2A are located. Subsequently, when the positive and negative electrodes are reversely connected, the current of the charging module cannot be transmitted to the battery.

[0095] In addition, when the positive and negative electrodes of the battery are reversely connected, the voltage collected by the positive input terminal of the voltage comparator U5 will exceed the reference voltage. A high level is output at the output terminal of the voltage comparator U5 and passes through the diode D5 to make the light-emitting diode LED(R) emit light. The red light emitted by the light-emitting diode LED(R) indicates to the user that the positive and negative electrodes of the current battery are reversely connected and an abnormality occurs.

[0096] The embodiment of the present application also provides a battery charging protection method, which is executed by the charger. Refer to Figure 2 and the method includes:

[0097] Step S101: When it is detected that the self-service charging device starts charging the electric vehicle, it is detected whether the vehicle owner's location information is received.

[0098] Specifically, when it is detected that the self-service charging device starts charging the electric vehicle, it indicates that the user has paid and started charging. At this time, it starts to detect whether the vehicle owner's location information is received. The vehicle owner's location information is used to represent the location of the vehicle owner. If the vehicle owner's location information can be detected, it indicates that the vehicle owner is near the electric vehicle and there is no need to give a warning about power theft behavior. If the vehicle owner's location information cannot be detected, it indicates that the vehicle owner is far from the electric vehicle and a warning about power theft behavior needs to be given.

[0099] Among them, the method of detecting whether the vehicle owner's location information is received can specifically be based on an induction element set on the key of the vehicle owner's electric vehicle. When the vehicle owner enters the preset range near the electric vehicle, the signal emitted by the induction element can be received, and at the same time, the position coordinates generated by the position sensor on the key of the vehicle owner's electric vehicle are obtained to obtain the vehicle owner's location information.

[0100] Step S102: If the vehicle owner's location information is not received, it is determined whether the battery of the electric vehicle is connected to the self-service charging device.

[0101] Specifically, when the vehicle owner's location information is not received, it is directly determined whether the battery of the electric vehicle is connected to the self-service charging device. When the battery of the electric vehicle is connected to the self-service charging device, it indicates that the electric vehicle is in a normal charging state. When it is detected that the battery of the electric vehicle is disconnected from the self-service charging device, it indicates that the electric vehicle is in an abnormal charging state at this time. It may be that the plug of the charger of the electric vehicle has fallen off, or there may be abnormal personnel stealing electricity, pulling out the charger of the original vehicle owner and replacing it with the charger of the abnormal personnel's electric vehicle to charge the charger of the abnormal personnel's electric vehicle.

[0102] Step S103: If so, the steps of detecting whether the vehicle owner's location information is received and, if the vehicle owner's location information is not received, determining whether the battery of the electric vehicle is connected to the self-service charging device are cyclically executed until the first preset condition is met.

[0103] Among them, the first preset condition includes receiving the vehicle owner's location information or detecting that the plug of the charger is not connected to the self-service charging device.

[0104] Specifically, when the battery of the electric vehicle is connected to the self-service charging device, it starts to cyclically detect whether the vehicle owner's location information is received. When the vehicle owner's location information is not received, it determines whether the charger plug is connected to the self-service charging device until the vehicle owner's location information is received, indicating that the vehicle owner is approaching the electric vehicle, and the detection of electricity theft behavior can be stopped. Or until it is detected that the charger plug is not connected to the self-service charging device, indicating that the connection between the charger plug and the self-service charging device is disconnected, there may be someone stealing electricity, or the charger plug has fallen off.

[0105] Step S104: If it is detected that the battery of the electric vehicle is not connected to the self-service charging device, a charging cancellation instruction is generated and sent to the self-service charging device to cause the self-service charging device to stop supplying power.

[0106] Specifically, when it is detected that the battery of the electric vehicle is not connected to the self-service charging device, it indicates that the charger plug has fallen off, or an abnormal person has replaced the charger to charge other electric vehicles. At this time, the charger will directly generate a charging cancellation instruction and send it to the self-service charging device to order the self-service charging device to stop supplying power to the current electric vehicle.

[0107] Among them, when the user logs in to the self-service charging platform to charge, the charger and the self-service charging device will establish a wireless connection. When the user exits the self-service charging platform, the charger and the self-service charging device are still connected wirelessly until the charger automatically disconnects from the self-service charging device within a preset time after the charger and the self-service charging device are disconnected.

[0108] The embodiment of the present application provides a battery charging protection method. When the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user has left, that is, to detect whether the vehicle owner's location information is received. When the user leaves, that is, when the vehicle owner's location information is not received, it starts to continuously detect whether there is an abnormal state such as the charger falling off or an abnormal person replacing the charger. When it is detected that the battery of the electric vehicle is not connected to the self-service charging device, it indicates that it is in an abnormal state. In order to effectively prevent people from stealing electricity, at this time, the self-service charging device will be controlled to stop supplying power, which is beneficial to reducing the user's loss.

[0109] A possible implementation manner of the embodiment of the present application is that in step S102, to detect whether the battery of the electric vehicle is connected to the self-service charging device, it can be specifically implemented by the following method 1 or method 2, where:

[0110] Method 1: Obtain the battery power, and judge whether the battery of the electric vehicle is connected to the self-service charging device according to the battery power.

[0111] Specifically, when the charger is charging, the power of the electric vehicle battery continuously increases without sudden step - like increases. For example, the power will not change from 10% to 18% within a few seconds; nor will the power remain stagnant when the battery is not fully charged.

[0112] Therefore, by obtaining the power of the electric vehicle battery in real - time, when there is a mutation in the power of the electric vehicle battery, for example, the difference between the power values obtained continuously twice exceeds the first preset threshold, it indicates that there is a mutation in the power of the electric vehicle battery. At this time, it is possible that someone has switched the plug connecting the charger to the battery to connect to another battery, replaced it with another battery to carry out electricity - stealing behavior, that is, it indicates that the current electric vehicle battery is not connected to the self - service charging device.

[0113] When the difference in the power of the electric vehicle battery within a preset period is less than the second preset threshold, it indicates that the power of the electric vehicle battery has not changed for a long time, indicating that the electric vehicle battery may be fully charged or the plug connecting the charger to the self - service charging device has been unplugged and no longer charges the electric vehicle battery, that is, it indicates that the current electric vehicle battery is not connected to the self - service charging device.

[0114] When the difference does not exceed the first preset threshold or the difference is not less than the second preset threshold, it indicates that the electric vehicle battery is not connected to the self - service charging device.

[0115] Method 2: Determine whether the plug of the charger is connected to the self - service charging device according to whether a trigger signal is obtained, so as to determine whether the electric vehicle battery is connected to the self - service charging device.

[0116] Specifically, a trigger device is set on the plug of the charger. For example, it can be a pressure sensor. When the charger is connected to the self - service charging device, the pressure sensor on the plug of the charger will be in a compressed state, generating pressure to output a trigger signal, which is obtained by the charger. When the charger obtains the trigger signal, it indicates that the electric vehicle battery is connected to the self - service charging device. When the charger does not obtain the trigger signal, it indicates that the electric vehicle battery is not connected to the self - service charging device.

[0117] In a possible implementation manner of the embodiment of the present application, in step S104, if it is detected that the electric vehicle battery is not connected to the self - service charging device, a charging cancellation instruction is generated and sent to the self - service charging device to cause the self - service charging device to stop power supply. After that, it further includes step Sa1 (not shown in the figure) and step Sa2 (not shown in the figure), where:

[0118] Step Sa1: If it is detected that the charger is connected to the battery, obtain the power of the battery connected to the charger, and determine whether the power of the battery connected to the charger meets the second preset condition.

[0119] Among them, the second preset condition includes that the difference between the current power and the power obtained when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset range.

[0120] Step Sa2: If so, generate a resume charging instruction and send it to the self-service charging device to enable the self-service charging device to continue power supply.

[0121] Specifically, when it is detected that the charger is connected to the battery again, it may be that an abnormal person unplugged the battery of the electric vehicle and then restored the scene so that the battery of the original electric vehicle is connected to the charger and the self-service charging device again; it may also be that an abnormal person uses the charger of the original electric vehicle to charge their own electric vehicle. That is, the connected battery may be the battery corresponding to the original owner's electric vehicle, or it may be other batteries connected by other abnormal persons for stealing electricity intentionally. When the connected battery does not belong to the battery corresponding to the original owner's electric vehicle, it is necessary to prevent the electricity stealing behavior. When the connected battery belongs to the battery corresponding to the original owner's electric vehicle, the battery of the original electric vehicle can be charged continuously. At this time, a resume charging instruction will be generated to enable the self-service charging device to continue power supply. When the connected battery does not belong to the battery corresponding to the original owner's electric vehicle, the self-service charging device will still be kept in the state of stopping power supply.

[0122] Among them, the method for detecting whether the battery connected to the charger belongs to the battery of the original electric vehicle may specifically include detecting whether the difference between the current power obtained and the power when it is detected that the battery of the electric vehicle is disconnected from the self-service charging device is within a preset range. For example, when the power of the battery of the electric vehicle is charged to 70%, it is detected that the battery of the electric vehicle is disconnected from the self-service charging device. Then, when the charger detects that the battery is connected again, the power of the battery detected at this time is 80%, and the difference is 10%. If the preset range is -0.2% to +0.2%, it indicates that the difference in power exceeds the preset range, that is, the battery connected to the charger does not belong to the battery of the original electric vehicle.

[0123] In a possible implementation manner of the embodiment of the present application, the method further includes step Sb1 (not shown in the figure) and step Sb2 (not shown in the figure), where:

[0124] Step Sb1: When the vehicle owner's location information is not received and it is not detected that the battery of the electric vehicle is connected to the self-service charging device, or when the vehicle owner's location information is received, determine whether the battery of the electric vehicle is fully charged according to the obtained power of the battery of the electric vehicle.

[0125] Specifically, when the location information of the vehicle owner is not received, it indicates that the vehicle owner of the electric vehicle may have left around the electric vehicle. And if the battery of the electric vehicle is connected to the self-service charging device at this time, it indicates that the battery of the electric vehicle is still in the charging state. If the battery of the electric vehicle is continuously charged, overcharging may occur, and overcharging of the battery may cause the battery to malfunction.

[0126] If the location information of the vehicle owner is received, but the battery of the electric vehicle may also be continuously charged, the vehicle owner may not be able to timely check and know the battery power of the electric vehicle. To prevent overcharging, the charger will determine whether the battery is in a fully charged state according to the battery power. The fully charged state means that the battery power of the electric vehicle has been fully charged.

[0127] Step Sb2: If it is in the fully charged state, control the disconnection of the connection between the charger and the battery, generate a charging termination instruction, and send it to the self-service charging device so that the self-service charging device ends the power supply.

[0128] Specifically, when in the fully charged state, to prevent overcharging, the charger will control the disconnection of the connection with the battery, and at the same time generate a charging termination instruction to the self-service charging device so that the self-service charging device ends the power supply. And after the charging termination instruction is sent to the self-service charging device, the self-service charging device can receive the charging requirements of other chargings.

[0129] If when the charger has not generated a charging termination instruction and has not received the location information of the vehicle owner, if someone else attempts to unplug the user's charger, replace it with their own charger and start the self-service charging device to scan the code for payment to charge their own battery, the self-service charging device will not respond to the charging requirements of other devices because it has not received the charging termination instruction, that is, the self-service charging device will not supply power to other devices.

[0130] Specifically, to prevent overcharging from occurring, an overcharge prevention circuit can be added to the internal circuit of the charger to achieve the effect of overcharge prevention. Specifically, refer to Figure 1 , Figure 1The protection module in the circuit shown also includes an overcharge protection unit. The overcharge protection unit includes a voltage comparator U5', a resistor R14, a diode D6, a triode Q6, a triode Q3, a resistor R15, a resistor R23, a resistor R16, and a resistor R17. Among them, one end of the resistor R23 is connected to the end of the secondary coil of the transformer that is not connected to the synchronous rectifier power switch chip D3A, and the other end is grounded; the 6-pin of the voltage comparator U5' is the negative input terminal and is used to connect to the grounded end of the resistor R23, the 5-pin is the positive input terminal and is used to connect to one end of the resistor R16. The other end of the resistor R16 is connected to the positive terminal of the capacitor C9. The 5-pin is also connected to one end of the resistor R17, and the other end of the resistor R17 is grounded. The output terminal of the voltage comparator U5' is used to connect to one end of the resistor R14, and the other end of the resistor R14 is connected to the base of the triode Q6. The triode Q6 is a PNP single-stage transistor. The emitter is connected to one end of the resistor R15, the other end of the resistor R15 is connected to the power supply VD2, and the collector is connected to the anode of the light-emitting diode LED(R). The anode of the diode D6 is connected to the emitter of the triode Q6, and the cathode is connected to the anode of the light-emitting diode LED(G). The cathode of the light-emitting diode LED(G) is grounded. The triode Q3 is a PNP triode, the base is connected to the base of the triode Q6, the collector is grounded, and the emitter is used to connect to the PWM controller U1.

[0131] When the battery is connected, the voltage comparator U5' will detect that there is a voltage on R23. At this time, the voltage comparator U5' continuously outputs a low level, so that the charger maintains a constant current output. When the battery is fully charged, the voltage comparator U5' outputs a high level, and the triode Q6 is cut off, so that the light-emitting diode LED(G) lights up. When the light-emitting diode LED(G) lights up, it emits green light to indicate that the current battery power is full; the triode Q3 is also in a cut-off state at this time, so that the circuit between the collector and the emitter is open, and then the voltage of the charger drops to turn off the charging current to prevent the battery from overcharging.

[0132] A possible implementation manner of the embodiment of the present application, the method further includes:

[0133] Obtain the power change curve of the battery of the electric vehicle. The power change curve is used to characterize the change relationship between the power of the electric vehicle and the charging duration.

[0134] When receiving the vehicle owner's location information and detecting that the charger is disconnected from the self-service charging device, feedback the power change curve to the vehicle owner's terminal device.

[0135] Specifically, the power change curve reflects the change of the power of the battery of the electric vehicle during the continuous charging process. The change relationship between the power and the charging duration reflects the effective charging duration of the battery.

[0136] When it is detected that the charger is disconnected from the self-service charging device and the location information of the vehicle owner is received, the power change curve can be fed back to the terminal device of the vehicle owner to prompt the vehicle owner about the change in the battery power during the current charging process. When someone steals electricity, there will be a period of time during which the power remains unchanged. Correspondingly, in the power change curve graph, a straight line or a downward-sloping line will be formed, indicating that the charger is disconnected from the self-service charging device during that period. The vehicle owner can then learn from the power change curve that there may be a behavior of someone stealing electricity during that period, so as to facilitate the vehicle owner to verify the situation.

[0137] A possible implementation manner of the embodiment of the present application is to obtain the power change curve of the battery of the electric vehicle, and then further include:

[0138] According to the power change curve, determine the actual charging duration corresponding to when the battery power increases by a preset power value;

[0139] Judge whether the actual charging duration is within a preset standard duration range;

[0140] If it is not within the preset standard duration range, then when the location information of the vehicle owner is received and it is detected that the charger is disconnected from the self-service charging device, generate a battery maintenance prompt message and feed it back to the terminal device of the vehicle owner.

[0141] Specifically, the preset power value can be a preset power value. For example, if the preset power value is set to 10%, the actual charging duration can be the charging duration corresponding to when starting from the power at the start of charging as the initial power and charging to the initial power + 10%.

[0142] If the actual charging duration is within the preset standard duration range, it indicates that when the battery is charging and the power increases by the preset power value, the corresponding charging duration is within the normal range;

[0143] If the actual charging duration is not within the preset standard duration range, it indicates that when the battery is charging and the power increases by the preset power value, the corresponding charging duration is too long or too short. When the charging duration is too long, it indicates that there may be a problem with the battery charger and the charging efficiency is reduced; when the charging duration is too short, it indicates that there may be an abnormality inside the battery, such as electrolyte leakage, resulting in a decrease in battery capacity. Therefore, when the battery power is not within the preset standard duration range, a battery maintenance prompt message will be generated to the terminal device of the vehicle owner to prompt the vehicle owner to promptly repair the battery of the electric vehicle to prevent the probability of more serious failures caused by continuing to use the battery when a failure occurs.

[0144] In a possible implementation manner of the embodiment of the present application, in step S101, when it is detected that the self-service charging device starts to charge the electric vehicle, it is detected whether the vehicle owner's location information is received. Before that, there are also steps Sd1 (not shown in the figure), step Sd2 (not shown in the figure), step Sd3 (not shown in the figure), and step Sd4 (not shown in the figure), where:

[0145] Step Sd1: When it is detected that the charger is connected to the self-service charging device, obtain the temperature information of the battery of the electric vehicle.

[0146] Step Sd2: Determine whether the temperature of the battery of the electric vehicle exceeds a preset temperature threshold.

[0147] Step Sd3: If it exceeds, generate a waiting instruction and send it to the self-service charging device, and loop to execute the steps of obtaining the temperature information of the battery of the electric vehicle and determining whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold until the temperature of the battery of the electric vehicle does not exceed the preset temperature threshold.

[0148] Step Sd4: If it does not exceed the preset temperature threshold, generate a charging start instruction and send it to the self-service charging device so that the self-service charging device starts charging.

[0149] Specifically, since the temperature is too high in summer, the temperature of the battery of the electric vehicle is generally high. If the battery of the electric vehicle is directly charged when the battery temperature is high, it may cause the battery temperature to be too high and cause damage, or even explosion, endangering the life of the battery. Therefore, when it is detected that the charger is connected to the self-service charging device, according to the temperature information of the battery of the electric vehicle, it is determined whether the battery temperature exceeds the preset temperature threshold. If it exceeds the preset temperature threshold, it indicates that the battery temperature is too high at this time. When the battery temperature is too high, a waiting instruction will be generated to the self-service charging device so that the self-service charging device does not charge the battery of the electric vehicle temporarily, and loop to execute step Sd1, step Sd2, and step Sd3, continuously determine whether the battery temperature exceeds the preset temperature threshold, and when it exceeds the preset temperature threshold, continuously generate a waiting instruction to the self-service charging device until when the battery temperature does not exceed the preset temperature threshold, a charging start instruction will be generated to the self-service charging device so that the self-service charging device starts to charge the battery of the electric vehicle, so as to reduce the damage caused to the battery by directly charging when the battery temperature is too high, and reduce the explosion probability when charging with too high battery temperature.

[0150] The above embodiment introduces a method for battery charging protection from the perspective of the method flow. The following embodiment introduces a battery charging protection device from the perspective of virtual modules or virtual units. For details, see the following embodiment.

[0151] Refer to Figure 3, a battery charging protection device 300, the device 300 comprising:

[0152] The location detection module 301 is used to detect whether the vehicle owner's location information is received when it is detected that the self-service charging device starts charging the electric vehicle;

[0153] A connection determination module 302 is used to determine whether the battery of the electric vehicle is connected to the self-service charging device when the vehicle owner's location information is not received;

[0154] The abnormality detection module 303 is used to, when yes, cyclically execute the step of detecting whether the vehicle owner's location information is received, and if the vehicle owner's location information is not received, determining whether the battery of the electric vehicle is connected to the self-service charging device, until a first preset condition is met, wherein the first preset condition includes receiving the vehicle owner's location information or detecting that the charger plug is not connected to the self-service charging device;

[0155] The abnormal power failure module 304 is used to generate a charging release instruction and send it to the self-service charging device when it is detected that the battery of the electric vehicle is not connected to the self-service charging device, so that the self-service charging device stops supplying power.

[0156] Specifically, when the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user has left, that is, the location detection module 301 detects whether the owner's location information is received. When the user leaves, that is, when the owner's location information is not received, the abnormal detection module 303 continuously detects whether the charger has fallen off or an abnormal person has replaced the charger. When the connection judgment module 302 detects that the battery of the electric vehicle is not connected to the self-service charging device, it indicates that it is in an abnormal state. In order to effectively prevent people from stealing electricity, the abnormal power outage module 304 will control the self-service charging device to stop supplying power, which is beneficial to reduce user losses.

[0157] In a possible implementation of the embodiment of the present application, the connection determination module 302 is specifically used to detect whether the battery of the electric vehicle is connected to the self-service charging device:

[0158] Obtain the battery power, and determine whether the battery of the electric vehicle is connected to the self-service charging device according to the battery power; or,

[0159] According to whether the trigger signal is obtained, it is determined whether the charger plug is connected to the self-service charging device, so as to determine whether the battery of the electric vehicle is connected to the self-service charging device.

[0160] In a possible implementation of the embodiment of the present application, the apparatus 300 further includes:

[0161] A condition judgment module, configured to obtain the power of the battery connected to the charger and determine whether the power of the battery connected to the charger meets a second preset condition when it is detected that the charger is connected to the battery;

[0162] Wherein, the second preset condition includes: the difference between the power and the power obtained when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset range;

[0163] A charging recovery module, configured to generate a charging recovery instruction and send it to the self-service charging device when it is yes, so that the self-service charging device continues to supply power.

[0164] In a possible implementation manner of the embodiment of the present application, the device 300 further includes:

[0165] A power detection module, configured to determine whether the battery of the electric vehicle is fully charged according to the obtained power of the battery of the electric vehicle when the vehicle owner's location information is not received and it is not detected that the battery of the electric vehicle is connected to the self-service charging device, or when the vehicle owner's location information is received;

[0166] A full-power power-off module, configured to control the disconnection of the connection between the charger and the battery when it is in a full-power state, generate a charging termination instruction, and send it to the self-service charging device, so that the self-service charging device ends the power supply.

[0167] In a possible implementation manner of the embodiment of the present application, the device 300 further includes:

[0168] A power acquisition module, configured to acquire a power change curve of the battery of the electric vehicle, where the power change curve is used to characterize the change relationship between the power of the electric vehicle and the charging duration;

[0169] A power feedback module, configured to feedback the power change curve to the terminal device of the vehicle owner when the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device.

[0170] In a possible implementation manner of the embodiment of the present application, the device 300 further includes:

[0171] A duration determination module, configured to determine the actual charging duration corresponding to when the power of the battery increases by a preset power value according to the power change curve;

[0172] A duration judgment module, configured to judge whether the actual charging duration is within a preset standard duration range;

[0173] A maintenance feedback module, configured to generate a battery maintenance prompt message and feedback it to the terminal device of the vehicle owner when it is not within the preset standard duration range and when the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device.

[0174] In a possible implementation manner of the embodiment of the present application, the device 300 further includes:

[0175] A temperature acquisition module, configured to acquire the temperature information of the battery of the electric vehicle when it is detected that the charger is connected to the self-service charging device;

[0176] A temperature judgment module, configured to judge whether the temperature of the battery of the electric vehicle exceeds a preset temperature threshold;

[0177] A waiting module, configured to generate a waiting instruction and send it to the self-service charging device when the temperature exceeds, and loop to execute the steps of acquiring the temperature information of the battery of the electric vehicle and judging whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold until the temperature of the battery of the electric vehicle does not exceed the preset temperature threshold;

[0178] A start determination module, configured to generate a charging start instruction and send it to the self-service charging device when the preset temperature threshold is not exceeded, so that the self-service charging device starts charging.

[0179] Those skilled in the art can clearly understand that for the convenience and conciseness of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments, and will not be repeated here.

[0180] The embodiment of the present application also introduces a charger from the perspective of an entity device, as Figure 4 shown, Figure 4 The charger 400 shown includes a processor 401 and a memory 403. Among them, the processor 401 and the memory 403 are connected, such as connected through a bus 402. Optionally, the charger 400 may further include a transceiver 404. It should be noted that in actual applications, the transceiver 404 is not limited to one, and the structure of the charger 400 does not constitute a limitation on the embodiment of the present application.

[0181] The processor 401 may be a CPU (Central Processing Unit, central processor), a general-purpose processor, a DSP (Digital Signal Processor, data signal processor), an ASIC (Application Specific Integrated Circuit, application-specific integrated circuit), an FPGA (Field Programmable Gate Array, field programmable gate array) or other programmable logic devices, transistor logic devices, hardware components or any combination thereof. It can implement or execute various exemplary logic blocks, modules, and circuits described in conjunction with the disclosure of the present application. The processor 401 may also be a combination that implements a computing function, such as a combination including one or more microprocessors, a combination of a DSP and a microprocessor, etc.

[0182] The bus 402 may include a path for transmitting information between the above components. The bus 402 can be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus, etc. The bus 402 can be divided into an address bus, a data bus, a control bus, etc. For the sake of representation, Figure 4 only a thick line is used to represent it in the figure, but it does not mean that there is only one bus or one type of bus.

[0183] The memory 403 can be a ROM (Read Only Memory) or other types of static storage devices that can store static information and instructions, a RAM (Random Access Memory) or other types of dynamic storage devices that can store information and instructions, or it can also be an EEPROM (Electrically Erasable Programmable Read Only Memory), a CD-ROM (Compact Disc Read Only Memory), or other optical disc storage, optical disc storage (including compact discs, laser discs, optical discs, digital versatile discs, Blu-ray discs, etc.), magnetic disk storage media, or other magnetic storage devices, or any other medium that can be used to carry or store the desired program code in the form of instructions or data structures and can be accessed by a computer, but not limited to this.

[0184] The memory 403 is used to store the application program code for implementing the solution of this application and is controlled by the processor 401 to execute. The processor 401 is used to execute the application program code stored in the memory 403 to implement the content shown in the foregoing method embodiments.

[0185] The embodiments of this application provide a computer-readable storage medium on which a computer program is stored. When it runs on a computer, it enables the computer to execute the corresponding content in the foregoing method embodiments. In the embodiments of this application, when the user starts to charge the electric vehicle through the self-service charging device, it starts to detect whether the user leaves, that is, whether the vehicle owner's location information is received. When the user leaves, that is, when the vehicle owner's location information is not received, it starts to continuously detect whether an abnormal state such as the charger falling off or an abnormal person replacing the charger occurs. When it is detected that the battery of the electric vehicle is not connected to the self-service charging device, it indicates an abnormal state. In order to effectively prevent people from stealing electricity, at this time, the self-service charging device will be controlled to stop power supply, which is beneficial to reducing the user's loss.

[0186] It should be understood that although the steps in the flowchart of the accompanying drawings are shown sequentially according to the indications of the arrows, these steps are not necessarily executed sequentially in the order indicated by the arrows. Unless there is a clear indication in this document, there is no strict order restriction for the execution of these steps, and they can be executed in other orders. Moreover, at least some of the steps in the flowchart of the accompanying drawings may include multiple sub-steps or multiple stages. These sub-steps or stages are not necessarily completed at the same time, but can be executed at different times, and their execution order is not necessarily sequential, but can be executed alternately or in turn with at least some of the sub-steps or stages of other steps or other steps.

[0187] The above are only some implementation manners of the present application. It should be noted that for those of ordinary skill in the art in this technical field, without departing from the principle of the present application, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present application.

Claims

1. A battery charging protection method, characterized in that, The method includes: When it is detected that the self-service charging device starts charging the electric vehicle, detect whether the vehicle owner's location information is received; If the vehicle owner's location information is not received, determine whether the battery of the electric vehicle is connected to the self-service charging device; If so, repeatedly execute the steps of detecting whether the vehicle owner's location information is received, and if the vehicle owner's location information is not received, determine whether the battery of the electric vehicle is connected to the self-service charging device, until a first preset condition is met. The first preset condition includes receiving the vehicle owner's location information or detecting that the plug of the charger is not connected to the self-service charging device; Wherein, if it is detected that the battery of the electric vehicle is not connected to the self-service charging device, a charging cancellation instruction is generated and sent to the self-service charging device, so that the self-service charging device stops power supply; Wherein, after generating a charging cancellation instruction and sending it to the self-service charging device to stop the power supply when it is detected that the battery of the electric vehicle is not connected to the self-service charging device, the method further includes: If it is detected that the charger is connected to the battery, obtain the power of the battery connected to the charger, and determine whether the power of the battery connected to the charger meets a second preset condition; Wherein, the second preset condition includes: the difference between the power and the power obtained when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset range; If so, generate a resume charging instruction and send it to the self-service charging device, so that the self-service charging device continues to supply power.

2. The method according to claim 1, characterized in that, The detection of whether the battery of the electric vehicle is connected to the self-service charging device includes any one of the following: Obtain the power of the battery, and determine whether the battery of the electric vehicle is connected to the self-service charging device according to the power of the battery; Judge whether the plug of the charger is connected to the self-service charging device according to whether a trigger signal is obtained, so as to judge whether the battery of the electric vehicle is connected to the self-service charging device.

3. The method according to claim 1, characterized in that, The method further includes: When the vehicle owner's location information is not received and it is not detected that the battery of the electric vehicle is connected to the self-service charging device, or when the vehicle owner's location information is received, judge whether the battery of the electric vehicle is fully charged according to the power of the battery of the electric vehicle obtained; If it is in a fully charged state, control the disconnection of the connection between the charger and the battery, generate a charging termination instruction, and send it to the self-service charging device, so that the self-service charging device ends the power supply.

4. The method according to claim 1, characterized in that, The method further includes: Obtain the power change curve of the battery of the electric vehicle, and the power change curve is used to characterize the change relationship between the power of the electric vehicle and the charging duration; When the vehicle owner's location information is received and it is detected that the charger is disconnected from the self-service charging device, feedback the power change curve to the terminal device of the vehicle owner.

5. The method according to claim 4, characterized in that, After obtaining the power change curve of the battery of the electric vehicle, the method further includes: According to the power change curve, determine the actual charging duration corresponding to when the power of the battery increases by a preset power value; Judge whether the actual charging duration is within a preset standard duration range; If it is not within the preset standard time interval, when the owner's location information is received and the charger is detected to be disconnected from the self-service charging device, a battery maintenance reminder message is generated and fed back to the owner's terminal device.

6. The method according to claim 1, characterized in that, When it is detected that the self-service charging device starts to charge the electric vehicle, it is detected whether the vehicle owner's location information is received, and the previous steps include: When it is detected that the charger is connected to the self-service charging device, the temperature information of the battery of the electric vehicle is obtained; Determining whether the temperature of the battery of the electric vehicle exceeds a preset temperature threshold; If it exceeds, a waiting instruction is generated and sent to the self-service charging device, and the steps of obtaining the temperature information of the battery of the electric vehicle and determining whether the temperature of the battery of the electric vehicle exceeds the preset temperature threshold are executed repeatedly until the temperature of the battery of the electric vehicle does not exceed the preset temperature threshold; If the temperature does not exceed the preset temperature threshold, a charging start instruction is generated and sent to the self-service charging device, so that the self-service charging device starts charging.

7. A battery charging protection device, characterized in that, include: A location detection module, used to detect whether the vehicle owner's location information is received when it is detected that the self-service charging device starts charging the electric vehicle; A connection determination module, used for determining whether the battery of the electric vehicle is connected to the self-service charging device when the vehicle owner's location information is not received; an abnormality detection module, for, when yes, cyclically executing the step of detecting whether the vehicle owner's location information is received, and if the vehicle owner's location information is not received, determining whether the battery of the electric vehicle is connected to the self-service charging device, until a first preset condition is met, wherein the first preset condition includes receiving the vehicle owner's location information or detecting that the charger plug is not connected to the self-service charging device; an abnormal power failure module, for generating a charging release instruction and sending it to the self-service charging device when it is detected that the battery of the electric vehicle is not connected to the self-service charging device, so that the self-service charging device stops supplying power; The device further comprises: a condition judgment module, configured to, when detecting that a charger is connected to a battery, obtain the power level of the battery connected to the charger, and judge whether the power level of the battery connected to the charger satisfies a second preset condition; Wherein, the second preset condition includes: the difference between the power level and the power level acquired when it is detected that the battery of the electric vehicle is not connected to the self-service charging device is within a preset range; The charging recovery module is used to generate a charging recovery instruction when the condition is met, and send the instruction to the self-service charging device so that the self-service charging device continues to supply power.

8. A charger, characterized in that, The charger includes: at least one processor; Memory; At least one application, wherein the at least one application is stored in a memory and configured to be executed by at least one processor, and the at least one application is configured to: execute the battery charging protection method according to any one of claims 1 to 6.

9. A computer-readable storage medium, on which a computer program is stored, characterized in that, When the computer program is executed in a computer, the computer is caused to execute the battery charging protection method according to any one of claims 1 to 6.

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