Mobile charging method and device

Abstract

The embodiment of the invention provides a mobile charging method and device.The mobile charging method is applied to mobile charging inspection equipment, the mobile charging inspection equipment comprises a DCDC converter and a charging gun, the DCDC converter is electrically connected with the charging gun, the mobile charging inspection equipment receives a charging request sent by equipment to be charged through the charging gun, and the charging request is sent to the equipment to be charged through the charging gun. The charging request carries a charging demand message; the DC power supply of the power supply equipment is converted through a DCDC converter according to the charging demand voltage carried in the charging demand message, and the converted DC power supply is obtained; and transmitting the converted direct-current power supply to a charging gun, and charging the to-be-charged equipment through the charging gun.

Description

Technical Field

[0001] The embodiments of this specification relate to the technical field of power batteries, and in particular to a mobile charging method. Background Art

[0002] As the number of electric vehicles continues to increase, the problem of difficulty in charging will become more prominent. Although charging piles have become the focus of infrastructure construction, in fact, the construction progress of charging piles has always lagged behind the growth in the number of electric vehicles. Full construction of charging piles will cause a large waste of resources, high maintenance costs, and large land occupation. Construction of charging piles at a lower ratio will lead to charging difficulties in specific scenarios, such as charging in scenic spots during holidays and charging in service areas in various places during the New Year.

[0003] How to solve the existing problems of charging difficulty and low efficiency is a technical problem that needs to be solved urgently. Summary of the invention

[0004] In view of this, an embodiment of this specification provides a mobile charging method. One or more embodiments of this specification also relate to a mobile charging device, a computing device, a computer-readable storage medium and a computer program to solve the technical defects existing in the prior art.

[0005] According to a first aspect of an embodiment of this specification, a mobile charging method is provided, which is applied to a mobile charging and testing device, wherein the mobile charging and testing device includes a DCDC converter and a charging gun, wherein the DCDC converter is electrically connected to the charging gun, and the method includes:

[0006] Receiving a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message;

[0007] The DC power supply of the power supply device is converted by the DCDC converter according to the charging requirement voltage carried in the charging requirement message to obtain the converted DC power supply;

[0008] The converted DC power is transmitted to the charging gun, and the device to be charged is charged through the charging gun.

[0009] Optionally, the mobile charging and testing device further includes a discharge gun, the DCDC converter is electrically connected to the discharge gun, and the method further includes:

[0010] In response to a discharge request sent by the device to be charged through the discharge gun, discharging the device to be charged through the discharge gun;

[0011] The DCDC converter converts the current of the device to be charged into a direct current power supply consistent with the power supply voltage of the power supply device and transmits it to the power supply device.

[0012] Optionally, the mobile charging method further includes:

[0013] Determine a first state of charge of each battery in a battery pack of the power supply device at a target time;

[0014] After the battery pack is left at rest for a target time, a difference in state of charge and a difference in voltage of each battery before and after the battery pack is left at rest are determined;

[0015] A balancing strategy for the battery pack is determined according to the first state of charge, the state of charge difference, and the voltage difference.

[0016] Optionally, determining a first state of charge of each battery in a battery pack of the power supply device at a target time includes:

[0017] Receiving a vehicle control message sent by the power supply device, and reading the initial state of charge of each battery in the battery pack of the power supply device from the vehicle control message;

[0018] Receiving a charging control message sent by the device to be charged, and reading a charging current and a charging duration of the device to be charged from the charging control message;

[0019] Based on the initial state of charge, the charging current and the charging duration, a first state of charge of each battery at a target time is determined.

[0020] Optionally, determining a balancing strategy for the battery pack according to the first state of charge, the state of charge difference, and the voltage difference includes:

[0021] When the first state of charge is greater than or equal to a first preset threshold, the state of charge difference is greater than or equal to a second preset threshold, or the voltage difference is greater than or equal to a third preset threshold, determining a balancing index and determining a battery to be balanced corresponding to the balancing index;

[0022] Determining a balancing parameter of the battery to be balanced according to the balancing index and the charge state of the battery to be balanced;

[0023] According to the balancing parameters, the balancing device is controlled to perform battery balancing processing on the battery to be balanced.

[0024] Optionally, the mobile charging method further includes:

[0025] Receive device status information of the device to be charged and current discharge status information of the power supply device;

[0026] Based on the device status information and the current discharge status information, determine a discharge module in the power supply device for charging the device to be charged, and send a charging permission signal to the device to be charged, wherein the charging permission signal is used to instruct the device to be charged to turn on the charging module;

[0027] A discharge instruction is sent to the power supply device, wherein the discharge instruction carries information of the discharge module, and the discharge instruction is used to instruct the power supply device to turn on the discharge module to charge the charging module.

[0028] Optionally, the mobile charging and inspection device further includes a battery assembly and a discharge gun, the battery assembly is electrically connected to the DCDC converter, the mobile charging and inspection device is physically connected to the power supply device through the discharge gun, and the battery assembly is used to power a battery management system of the power supply device through the discharge gun;

[0029] Accordingly, the method further comprises:

[0030] Receive the vehicle control message sent by the power supply equipment through the battery management system.

[0031] According to a second aspect of an embodiment of this specification, a mobile charging device is provided, which is applied to a mobile charging and testing device, wherein the mobile charging and testing device comprises a DCDC converter and a charging gun, wherein the DCDC converter is electrically connected to the charging gun, and the device comprises:

[0032] A receiving module, configured to receive a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message;

[0033] a conversion module, configured to convert the DC power supply of the power supply device according to the charging requirement voltage carried in the charging requirement message through the DCDC converter to obtain the converted DC power supply;

[0034] The charging module is configured to transmit the converted DC power to the charging gun, and charge the device to be charged through the charging gun.

[0035] According to a third aspect of an embodiment of this specification, a computing device is provided, including:

[0036] Memory and processor;

[0037] The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions to implement any step of the mobile charging method.

[0038] According to a fourth aspect of the embodiments of this specification, a computer-readable storage medium is provided, which stores computer-executable instructions, and when the instructions are executed by a processor, the steps of any one of the mobile charging methods are implemented.

[0039] According to a fifth aspect of the embodiments of this specification, a computer program is provided, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned mobile charging method.

[0040] In one embodiment of this specification, a mobile charging and inspection device receives a charging request sent by a device to be charged through a charging gun, wherein the charging request carries a charging requirement message; the DC power supply of the power supply device is converted by a DCDC converter according to the charging requirement voltage carried in the charging requirement message to obtain a converted DC power supply; the converted DC power supply is transmitted to the charging gun, and the device to be charged is charged by the charging gun. In this embodiment of the specification, the energy storage battery is directly converted to DC power by a DCDC converter, that is, the device to be charged is directly charged by connecting the energy storage battery to the mobile charging and inspection device, which is beneficial to both improving charging efficiency and reducing equipment costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 is a flow chart of a mobile charging method provided by an embodiment of this specification;

[0042] Figure 2 is a process flow chart of a mobile charging method provided by an embodiment of this specification;

[0043] Figure 3 It is a structural schematic diagram of a mobile charging device provided by an embodiment of this specification;

[0044] Figure 4 It is a structural block diagram of a computing device provided by an embodiment of this specification. DETAILED DESCRIPTION

[0045] Many specific details are described in the following description to facilitate a full understanding of this specification. However, this specification can be implemented in many other ways than those described herein, and those skilled in the art can make similar generalizations without violating the connotation of this specification, so this specification is not limited to the specific implementation disclosed below.

[0046] The terms used in one or more embodiments of this specification are only for the purpose of describing specific embodiments, and are not intended to limit one or more embodiments of this specification. The singular forms of "a", "said" and "the" used in one or more embodiments of this specification and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used in one or more embodiments of this specification refers to and includes any or all possible combinations of one or more associated listed items.

[0047] It should be understood that although the terms first, second, etc. may be used to describe various information in one or more embodiments of this specification, this information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of one or more embodiments of this specification, the first may also be referred to as the second, and similarly, the second may also be referred to as the first. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0048] First, the terms involved in one or more embodiments of this specification are explained.

[0049] DC-to-DC converter: also known as DCDC converter, is a circuit or electromechanical device for power conversion, which can convert direct current (DC) power into direct current (or near-direct current) power of different voltages.

[0050] State of Charge (SOC): It is used to reflect the remaining capacity of the battery. Its value is defined as the ratio of the remaining capacity to the battery capacity, usually expressed as a percentage. Its value range is 0 to 1. When "SOC = 0", it means that the battery is fully discharged, and when "SOC = 1", it means that the battery is fully charged.

[0051] Battery Management System (BMS): commonly known as a battery nanny or battery butler, it can be used to intelligently manage and maintain each battery unit, prevent the battery from overcharging and over-discharging, extend the battery life, and monitor the battery status.

[0052] Battery Charge Lead (BCL): The vehicle starts sending this message after receiving the charger output ready message, in order to report its charging demand information (charging voltage, charging current, constant voltage charging or constant current charging) to the charger. This charging demand information is updated in real time, mainly with the charging strategy of the BMS.

[0053] Power Conversion System (PCS): also known as bidirectional energy storage inverter, is the core component that realizes the bidirectional flow of electric energy between the energy storage system and the power grid. It is used to control the charging and discharging process of the battery and perform AC / DC conversion.

[0054] Vehicle to Grid (V2G) technology: refers to the two-way interactive technology between electric vehicles and the grid, allowing electric vehicles to charge from the grid when the grid load is low, and feed the electric energy in the battery back to the grid when the grid load is high. The core idea is to use the energy storage of a large number of electric vehicles as a buffer between the grid and renewable energy.

[0055] In this specification, a mobile charging method is provided. This specification also relates to a mobile charging device, a computing device, a computer-readable storage medium, and a computer program, which are described in detail one by one in the following embodiments.

[0056] Figure 1 A flow chart of a mobile charging method provided according to an embodiment of the present specification is shown, which is applied to a mobile charging and inspection device, wherein the mobile charging and inspection device includes a DCDC converter and a charging gun, wherein the DCDC converter is electrically connected to the charging gun, and specifically includes the following steps.

[0057] Step 102: Receive a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message.

[0058] Specifically, the device to be charged can be an electric vehicle or other device with charging requirements. Before charging, the device to be charged is physically connected to the mobile charging and inspection device through a charging gun.

[0059] The charging requirement message can be the BCL sent by the device to be charged to the mobile charging and detection device through the charging gun during the charging stage. The BCL carries the charging requirement information of the device to be charged (charging current, charging voltage, constant voltage charging or constant current charging, etc.), and is used for the DCDC converter in the mobile charging and detection device to perform DC conversion according to the charging current.

[0060] Step 104: converting the DC power supply of the power supply device according to the charging requirement voltage carried in the charging requirement message through the DCDC converter to obtain a converted DC power supply.

[0061] Specifically, since the DCDC converter is a DC-DC converter, its function is to convert a DC power supply into a DC (or approximately DC) power supply of different voltages. Therefore, in the embodiments of this specification, a DCDC converter is provided in the mobile charging and inspection device, that is, when charging the device to be charged through the power supply device, it is possible to realize that when the DC power of the energy storage battery is charged through the power supply device, there is no need to convert the DC power of the energy storage battery into AC power through the PCS, and then use the charging pile to rectify the AC power and convert it into DC power to charge the vehicle, but directly convert the DC power of the energy storage battery into DC power that can be used by the device to be charged, which is conducive to improving the processing efficiency of the charging process.

[0062] Step 106: Deliver the converted DC power to the charging gun, and charge the device to be charged through the charging gun.

[0063] Specifically, after the DC conversion is performed by the DCDC converter, the converted DC power supply can meet the charging demand of the device to be charged. Therefore, the converted DC power supply can be transmitted to the charging gun, and the device to be charged can be charged through the charging gun.

[0064] In an optional implementation, the mobile charging and testing device further includes a discharge gun, the DCDC converter is electrically connected to the discharge gun, and the method further includes:

[0065] In response to a discharge request sent by the device to be charged through the discharge gun, discharging the device to be charged through the discharge gun;

[0066] The DC power supply of the device to be charged is converted into a DC power supply consistent with the power supply voltage of the power supply device by the DCDC converter and transmitted to the power supply device.

[0067] Specifically, the aforementioned embodiments are used to illustrate that the mobile charging and inspection device can be used to charge the device to be charged, and the embodiments of this specification are used to illustrate that the mobile charging and inspection device can also be used to discharge the device to be charged.

[0068] In the embodiments of this specification, the mobile charging and testing equipment is further provided with a discharge gun, and the discharge gun is electrically connected to the DCDC converter.

[0069] When the device to be charged has a discharge demand, before discharge, the device to be charged and the mobile charging and inspection device are physically connected through a discharge gun, and then the device to be charged can send a discharge request to the mobile charging and inspection device through the discharge gun, and transmit its DC power to the discharge gun, and then the DCDC converter converts the DC power into a DC power consistent with the power supply voltage of the power supply device. After the conversion is completed, the converted DC power is transmitted to the power supply device. Among them, the power supply voltage of the power supply device can also be obtained through the BCL sent by the power supply device.

[0070] In the embodiments of this specification, the device to be charged can be connected to the battery pack of the power supply device to discharge and charge the battery pack, without the need for a charging pile and a load, thus greatly saving the equipment investment cost.

[0071] In an optional embodiment, the method further includes:

[0072] Determine a first state of charge of each battery in a battery pack of the power supply device at a target time;

[0073] After the battery pack is left at rest for a target time, a difference in state of charge and a difference in voltage of each battery before and after the battery pack is left at rest are determined;

[0074] A balancing strategy for the battery pack is determined according to the first state of charge, the state of charge difference, and the voltage difference.

[0075] Further, the determining of a first state of charge of each battery in a battery pack of the power supply device at a target time includes:

[0076] Receiving a vehicle control message sent by the power supply device, and reading the initial state of charge of each battery in the battery pack of the power supply device from the vehicle control message;

[0077] Receiving a charging control message sent by the device to be charged, and reading a charging current and a charging duration of the device to be charged from the charging control message;

[0078] Based on the initial state of charge, the charging current and the charging duration, a first state of charge of each battery at a target time is determined.

[0079] Specifically, the target time may be the time corresponding to when the charging of the device to be charged is completed.

[0080] If SOC1 is used to represent the first state of charge, then SOC1 = SOC0 - I*T / Q.

[0081] Among them, SOC0 is the initial state of charge, which can be the state of charge of each battery in the battery pack at the last moment, that is, when the device to be charged is not charged; I is the charging current; T is the charging time; Q is the nominal capacity.

[0082] In addition, the vehicle control message is the vehicle CAN (Controller Area Network), also known as Vehicle CAN, and the charging control message is the charging CAN (Charging CAN).

[0083] In BMS, CAN bus is a commonly used communication protocol for data exchange between battery modules and other vehicle systems.

[0084] Charging CAN usually refers to the CAN bus that connects the BMS and the charging equipment. It is mainly used for communication between the BMS and the charging controller (charger) to achieve functions such as charging control, charging status information exchange, and charging parameter setting.

[0085] Vehicle CAN refers to the CAN bus that connects the BMS with other vehicle control units (such as vehicle controller, instrument panel, power system, etc.). It is used to transmit key information of the BMS, such as battery status, fault code, state of charge (SOC), voltage and current data, etc., for use by other vehicle systems.

[0086] Therefore, when calculating the first state of charge, the initial state of charge of each battery can be read from the vehicle CAN, and the charging current and charging time of the device to be charged can be read from the charging CAN. Then, through the above formula for calculating SOC1, based on the initial state of charge, charging current and charging time, the first state of charge of each battery at the target time is determined.

[0087] In the embodiment of this specification, in addition to determining the balancing strategy of the battery pack by the first state of charge, two other parameters are also used, namely the state of charge difference and the voltage difference before and after the battery is stationary.

[0088] In practical applications, the target duration can be set to 2 hours, but the specific duration can be determined according to actual needs and is not limited here.

[0089] If the state of charge of the target battery in the static battery is SOC2 and the voltage is V1, and after standing for 2 hours, the state of charge of the target battery is SOC3 and the voltage is V2, then the difference in state of charge before and after standing is the absolute value of the difference between SOC2 and SOC3, and the difference in voltage before and after standing is the absolute value of the difference between V1 and V2.

[0090] In addition, after determining the first state of charge, the state of charge difference and the voltage difference, determining the balancing strategy of the battery pack according to the first state of charge, the state of charge difference and the voltage difference includes:

[0091] When the first state of charge is greater than or equal to a first preset threshold, the state of charge difference is greater than or equal to a second preset threshold, or the voltage difference is greater than or equal to a third preset threshold, determining a balancing index and determining a battery to be balanced corresponding to the balancing index;

[0092] Determining a balancing parameter of the battery to be balanced according to the balancing index and the charge state of the battery to be balanced;

[0093] According to the balancing parameters, the balancing device is controlled to perform battery balancing processing on the battery to be balanced.

[0094] Specifically, the balancing indicator can be determined according to the size of the first state of charge, the state of charge difference or the voltage difference. When the first state of charge is greater than or equal to the first preset threshold or the state of charge difference is greater than or equal to the second preset threshold, the balancing indicator can be the SOC difference; when the voltage difference is greater than or equal to the third preset threshold, the balancing indicator can be the voltage difference.

[0095] When the balancing indicator is the SOC difference, the SOC difference value can be determined according to actual needs. For example, if the balancing indicator is the SOC difference of 5%, it means that some batteries in the battery pack need to be balanced. After the balancing process, the maximum difference in the state of charge between the batteries in the battery pack is 5%.

[0096] After determining the balancing index, the battery to be balanced corresponding to the balancing index can be determined. Specifically, the battery to be balanced that needs to be charged under the balancing index can be screened through the difference between the charge state of each battery in the battery pack and the maximum value of the charge state of each battery. Then, according to the balancing index and the charge state of the battery to be balanced, the balancing parameters of the battery to be balanced can be calculated. The balancing parameters may include the amount of electricity to be charged and the charging time, etc. Then, according to the balancing parameters, the balancing device is controlled to perform battery balancing on the battery to be balanced.

[0097] In addition, the embodiments of this specification may also determine the battery to be balanced in combination with the health status or state of health (SOH) of the battery.

[0098] SOH is used to describe the performance and remaining life of a battery, measuring the accumulated loss and aging of a battery during long-term use. SOH is usually expressed as a value between 0 and 1, where 0 indicates extremely poor battery performance and 1 indicates good battery performance. As the battery is used and the number of charging cycles increases, the SOH will gradually decrease, resulting in a decrease in battery performance. Therefore, regular monitoring and maintenance of the battery's SOH is essential to ensure the normal operation of equipment or vehicles and extend battery life.

[0099] In the embodiments of this specification, SOH=(Qn / Qd)*100%.

[0100] Among them, Qn represents the rated capacity of a new battery; Qd represents the actual capacity of the current battery.

[0101] After determining the SOH, the SOH may also be compared with a preset threshold, and a balancing index and batteries to be balanced may be determined based on the comparison result.

[0102] In the embodiments of the present specification, it is determined whether the battery pack of the power supply device needs to be unpacked and actively balanced through the first state of charge, the difference in state of charge and the voltage difference, and the battery pack number that needs to be balanced can be directly located in this way, which is beneficial to improving the accuracy of the battery health assessment results, timely understanding of the battery health status, and timely balancing of the battery, thereby improving the battery performance and service life.

[0103] In an optional embodiment, the mobile charging and inspection device further includes a battery assembly and a discharge gun, the battery assembly is electrically connected to the DCDC converter, the mobile charging and inspection device is physically connected to the power supply device through the discharge gun, and the battery assembly is used to power the battery management system of the power supply device through the discharge gun;

[0104] Accordingly, the method further comprises:

[0105] Receive the vehicle control message sent by the power supply equipment through the battery management system.

[0106] Specifically, when performing battery inspection and maintenance on the battery pack of the power supply equipment, the mobile charging and inspection equipment can establish a physical connection with the power supply equipment through the discharge gun, and the DCDC converter converts the DC power of the battery pack into a DC power supply consistent with the power supply voltage of the power supply equipment, and transmits the converted DC power to the power supply equipment through the discharge gun, so that the battery pack supplies power to the BMS of the power supply equipment through the discharge gun and receives the vehicle CAN sent by the BMS of the power supply equipment, without the need for external AC power supply, which is conducive to improving the convenience of the battery inspection and maintenance process.

[0107] In an optional embodiment, the method further includes:

[0108] Receive device status information of the device to be charged and current discharge status information of the power supply device;

[0109] Based on the device status information and the current discharge status information, determine a discharge module in the power supply device for charging the device to be charged, and send a charging permission signal to the device to be charged, wherein the charging permission signal is used to instruct the device to be charged to turn on the charging module;

[0110] A discharge instruction is sent to the power supply device, wherein the discharge instruction carries information of the discharge module, and the discharge instruction is used to instruct the power supply device to turn on the discharge module to charge the charging module.

[0111] Specifically, the device status information may include the remaining power of the device to be charged; the current discharge status information of the power supply device may include the current remaining power of the power supply device, the usage of multiple discharge modules (battery packs) of the power supply device, etc.

[0112] The mobile charging and inspection device can determine the appropriate discharge module based on the current discharge status information and the device status information of the device to be charged. After determining the discharge module used to provide charging services for the device to be charged, a charging permission signal is sent to the device to be charged to instruct the device to be charged to turn on its own charging module to prepare for charging; similarly, the mobile charging and inspection device also needs to send a discharge instruction to the power supply device to instruct the power supply device to turn on the corresponding discharge module to realize the process of charging the device to be charged.

[0113] In addition, the mobile charging and inspection equipment is also equipped with an AC input interface, an Ethernet port, and a debugging port, among which the Ethernet port is used to perform equipment maintenance and internal code updates on the mobile charging and inspection equipment through external devices; the debugging port is used to debug the mobile charging and inspection equipment through external devices; and the AC input interface is used to charge the battery pack. The discharge gun and charging gun configured for the mobile charging and inspection equipment are both national standard guns, that is, the charging and discharging connection ends of the mobile charging and inspection equipment are connected through national standard guns, and support connection to national standard vehicle charging sockets. In addition, the mobile charging and inspection equipment comes with mobile wheels, which can be moved by hand and supports locking function, and can also be transported by forklift or hoisting.

[0114] The mobile charging and inspection equipment provided in the embodiments of this specification supports the V2G function and can support a maximum of 160kW. Under the premise of sufficient power supply, it can ensure that the power-deficient equipment is replenished to more than 80% within half an hour.

[0115] The mobile charging method provided in the embodiment of this specification is applied to a mobile charging and inspection device, which includes a DCDC converter and a charging gun, the DCDC converter is electrically connected to the charging gun, and the mobile charging and inspection device receives a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging demand message; the DC power supply of the power supply device is converted by the DCDC converter according to the charging demand voltage carried in the charging demand message to obtain the converted DC power supply; the converted DC power supply is transmitted to the charging gun, and the device to be charged is charged by the charging gun. The DC power supply of the energy storage battery is directly converted by the DCDC converter, that is, the DC conversion is completed by the conversion of the front and rear DCDC and the control drive protection of the digital signal processor, which can realize the direct charging of the device to be charged by connecting the mobile charging and inspection device to the energy storage battery, which is beneficial to both improving the charging efficiency and reducing the equipment cost; in addition, since the mobile charging and inspection device is movable, it can be used at any time with the energy storage battery or a new energy vehicle supporting the V2G function to temporarily supplement the power or provide road rescue for other devices to be charged, thereby improving the convenience of charging.

[0116] The following combination Figure 2 Taking the application of the mobile charging method provided in this specification in the electric vehicle charging scenario as an example, the mobile charging method is further described. Figure 2 A processing flow chart of a mobile charging method provided by an embodiment of the present specification is shown, which is applied to a mobile charging and inspection device, wherein the mobile charging and inspection device includes a DCDC converter, a charging gun and a discharging gun, and the DCDC converter is electrically connected to the charging gun and the discharging gun, and specifically includes the following steps.

[0117] Step 202: Establish a physical connection with the first electric vehicle through a charging gun.

[0118] Step 204: Establishing a physical connection with the second electric vehicle through the discharge gun.

[0119] Step 206: receiving the DC power transmitted by the second electric vehicle through the discharge gun.

[0120] Step 208: Receive a charging request sent by the first electric vehicle via a charging gun, wherein the charging request carries a charging requirement message.

[0121] Step 210: Convert the DC power supply of the first electric vehicle according to the charging requirement voltage carried in the charging requirement message through a DCDC converter to obtain a converted DC power supply.

[0122] Step 212: The converted DC power is transmitted to the charging gun, and the first electric vehicle is charged through the charging gun.

[0123] In the embodiments of this specification, the second electric vehicle can be connected to the battery pack of the first electric vehicle to discharge in order to charge the first electric vehicle, without the need for charging piles and loads, thus greatly saving equipment investment costs; in addition, during the charging process, the DC power supply of the first electric vehicle is directly converted to DC through a DCDC converter, so that the second electric vehicle can be connected to the mobile charging and inspection equipment to directly charge the first electric vehicle, which is beneficial to both improving charging efficiency and reducing equipment costs. In addition, since the mobile charging and inspection equipment is mobile, it can be used at any time with energy storage batteries or new energy vehicles that support V2G functions to temporarily supplement power or provide road rescue for other electric vehicles, thus improving the convenience of charging.

[0124] Corresponding to the above method embodiment, this specification also provides a mobile charging device embodiment, Figure 3 The structure diagram of a mobile charging device provided by an embodiment of the present specification is shown, and the mobile charging device is applied to a mobile charging and testing device, and the mobile charging and testing device includes a DCDC converter and a charging gun, and the DCDC converter is electrically connected to the charging gun. Figure 3 As shown, the device comprises:

[0125] The receiving module 302 is configured to receive a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message;

[0126] The conversion module 304 is configured to convert the DC power supply of the power supply device according to the charging requirement voltage carried in the charging requirement message through the DCDC converter to obtain the converted DC power supply;

[0127] The charging module 306 is configured to transmit the converted DC power to the charging gun, and charge the device to be charged through the charging gun.

[0128] Optionally, the mobile charging and testing equipment further includes a discharge gun, the DCDC converter is electrically connected to the discharge gun, and the device further includes a discharge module configured as follows:

[0129] In response to a discharge request sent by the device to be charged through the discharge gun, discharging the device to be charged through the discharge gun;

[0130] The DCDC converter converts the current of the device to be charged into a direct current power supply consistent with the power supply voltage of the power supply device and transmits it to the power supply device.

[0131] Optionally, the mobile charging device further includes a first processing module configured to:

[0132] Determine a first state of charge of each battery in a battery pack of the power supply device at a target time;

[0133] After the battery pack is left at rest for a target time, a difference in state of charge and a difference in voltage of each battery before and after the battery pack is left at rest are determined;

[0134] A balancing strategy for the battery pack is determined according to the first state of charge, the state of charge difference, and the voltage difference.

[0135] Optionally, the first processing module is further configured to:

[0136] Receiving a vehicle control message sent by the power supply device, and reading the initial state of charge of each battery in the battery pack of the power supply device from the vehicle control message;

[0137] Receiving a charging control message sent by the device to be charged, and reading a charging current and a charging duration of the device to be charged from the charging control message;

[0138] Based on the initial state of charge, the charging current and the charging duration, a first state of charge of each battery at a target time is determined.

[0139] Optionally, the first processing module is further configured to:

[0140] When the first state of charge is greater than or equal to a first preset threshold, the state of charge difference is greater than or equal to a second preset threshold, or the voltage difference is greater than or equal to a third preset threshold, determining a balancing index and determining a battery to be balanced corresponding to the balancing index;

[0141] Determining a balancing parameter of the battery to be balanced according to the balancing index and the charge state of the battery to be balanced;

[0142] According to the balancing parameters, the balancing device is controlled to perform battery balancing processing on the battery to be balanced.

[0143] Optionally, the mobile charging device further includes a second processing module configured to:

[0144] Receive device status information of the device to be charged and current discharge status information of the power supply device;

[0145] Based on the device status information and the current discharge status information, determine a discharge module in the power supply device for charging the device to be charged, and send a charging permission signal to the device to be charged, wherein the charging permission signal is used to instruct the device to be charged to turn on the charging module;

[0146] A discharge instruction is sent to the power supply device, wherein the discharge instruction carries information of the discharge module, and the discharge instruction is used to instruct the power supply device to turn on the discharge module to charge the charging module.

[0147] Optionally, the mobile charging and inspection device further includes a battery assembly and a discharge gun, the battery assembly is electrically connected to the DCDC converter, the mobile charging and inspection device is physically connected to the power supply device through the discharge gun, and the battery assembly is used to power a battery management system of the power supply device through the discharge gun;

[0148] Accordingly, the first processing module is further configured to:

[0149] Receive the vehicle control message sent by the power supply equipment through the battery management system.

[0150] The above is a schematic scheme of a mobile charging device of this embodiment. It should be noted that the technical scheme of the mobile charging device and the technical scheme of the mobile charging method described above are of the same concept, and the details not described in detail in the technical scheme of the mobile charging device can be referred to the description of the technical scheme of the mobile charging method described above.

[0151] Figure 4 The block diagram of a computing device 400 according to one embodiment of the present specification is shown. The components of the computing device 400 include but are not limited to a memory 410 and a processor 420. The processor 420 is connected to the memory 410 via a bus 430, and the database 450 is used to store data.

[0152] The computing device 400 also includes an access device 440 that enables the computing device 400 to communicate via one or more networks 460. Examples of these networks include a public switched telephone network (PSTN), a local area network (LAN), a wide area network (WAN), a personal area network (PAN), or a combination of communication networks such as the Internet. The access device 440 may include one or more of any type of network interface (e.g., a network interface card (NIC)) wired or wireless, such as an IEEE 802.11 wireless local area network (WLAN) wireless interface, a World Wide Interoperability for Microwave Access (Wi-MAX) interface, an Ethernet interface, a universal serial bus (USB) interface, a cellular network interface, a Bluetooth interface, a near field communication (NFC) interface, and the like.

[0153] In one embodiment of the present specification, the above components of the computing device 400 and Figure 4 Other components not shown in the figure may also be connected to each other, for example, via a bus. It should be understood that Figure 4 The computing device structure block diagram shown is only for the purpose of illustration, and is not intended to limit the scope of this specification. Those skilled in the art can add or replace other components as needed.

[0154] Computing device 400 may be any type of stationary or mobile computing device, including a mobile computer or mobile computing device (e.g., a tablet computer, a personal digital assistant, a laptop computer, a notebook computer, a netbook, etc.), a mobile phone (e.g., a smart phone), a wearable computing device (e.g., a smart watch, smart glasses, etc.), or other types of mobile devices, or a stationary computing device such as a desktop computer or PC. Computing device 400 may also be a mobile or stationary server.

[0155] The processor 420 is used to execute the following computer executable instructions, which implement the steps of the above-mentioned mobile charging method when executed by the processor.

[0156] The above is a schematic scheme of a computing device of this embodiment. It should be noted that the technical scheme of the computing device and the technical scheme of the mobile charging method described above are of the same concept, and the details of the technical scheme of the computing device not described in detail can be found in the description of the technical scheme of the mobile charging method described above.

[0157] An embodiment of the present specification further provides a computer-readable storage medium storing computer-executable instructions, which can implement the steps of the above mobile charging method when executed by a processor.

[0158] The above is a schematic scheme of a computer-readable storage medium of this embodiment. It should be noted that the technical scheme of the storage medium and the technical scheme of the mobile charging method described above are of the same concept, and the details not described in detail in the technical scheme of the storage medium can be referred to the description of the technical scheme of the mobile charging method described above.

[0159] An embodiment of the present specification further provides a computer program, wherein when the computer program is executed in a computer, the computer is caused to execute the steps of the above-mentioned mobile charging method.

[0160] The above is a schematic scheme of a computer program of this embodiment. It should be noted that the technical scheme of the computer program and the technical scheme of the mobile charging method described above are of the same concept, and the details not described in detail in the technical scheme of the computer program can be referred to the description of the technical scheme of the mobile charging method described above.

[0161] The above is a description of a specific embodiment of the specification. Other embodiments are within the scope of the appended claims. In some cases, the actions or steps recorded in the claims can be performed in an order different from that in the embodiments and still achieve the desired results. In addition, the processes depicted in the drawings do not necessarily require the specific order or continuous order shown to achieve the desired results. In some embodiments, multitasking and parallel processing are also possible or may be advantageous.

[0162] The computer instructions include computer program codes, which may be in source code form, object code form, executable files or some intermediate forms, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, USB flash drive, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory (ROM), random access memory (RAM), electric carrier signal, telecommunication signal and software distribution medium, etc. It should be noted that the content contained in the computer-readable medium may be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0163] It should be noted that, for the above-mentioned method embodiments, for the sake of simplicity of description, they are all expressed as a series of action combinations, but those skilled in the art should be aware that the embodiments of this specification are not limited by the order of the actions described, because according to the embodiments of this specification, some steps can be performed in other orders or simultaneously. Secondly, those skilled in the art should also be aware that the embodiments described in the specification are all preferred embodiments, and the actions and modules involved are not necessarily required by the embodiments of this specification.

[0164] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0165] The preferred embodiments of this specification disclosed above are only used to help explain this specification. The optional embodiments do not describe all the details in detail, nor do they limit the invention to only the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of the embodiments of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the embodiments of this specification, so that technicians in the relevant technical field can well understand and use this specification. This specification is only limited by the claims and their full scope and equivalents.

Claims

1. A mobile charging method, applied to a mobile charging and testing device, wherein the mobile charging and testing device comprises a DCDC converter and a charging gun, wherein the DCDC converter is electrically connected to the charging gun, and the method comprises: Receiving a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message; The DC power supply of the power supply device is converted by the DCDC converter according to the charging requirement voltage carried in the charging requirement message to obtain the converted DC power supply; The converted DC power is transmitted to the charging gun, and the device to be charged is charged through the charging gun.

2. The mobile charging method according to claim 1, wherein the mobile charging and testing device further comprises a discharge gun, the DCDC converter is electrically connected to the discharge gun, and the method further comprises: In response to a discharge request sent by the device to be charged through the discharge gun, discharging the device to be charged through the discharge gun; The DCDC converter converts the current of the device to be charged into a direct current power supply consistent with the power supply voltage of the power supply device and transmits it to the power supply device.

3. The mobile charging method according to claim 1, further comprising: Determine a first state of charge of each battery in a battery pack of the power supply device at a target time; After the battery pack is left at rest for a target time, a difference in state of charge and a difference in voltage of each battery before and after the battery pack is left at rest are determined; A balancing strategy for the battery pack is determined according to the first state of charge, the state of charge difference, and the voltage difference.

4. The mobile charging method according to claim 3, wherein determining the first state of charge of each battery in the battery pack of the power supply device at the target time comprises: Receiving a vehicle control message sent by the power supply device, and reading the initial state of charge of each battery in the battery pack of the power supply device from the vehicle control message; Receiving a charging control message sent by the device to be charged, and reading a charging current and a charging duration of the device to be charged from the charging control message; Based on the initial state of charge, the charging current and the charging duration, a first state of charge of each battery at a target time is determined.

5. According to the mobile charging method of claim 3, the step of determining the balancing strategy of the battery pack according to the first state of charge, the state of charge difference and the voltage difference comprises: When the first state of charge is greater than or equal to a first preset threshold, the state of charge difference is greater than or equal to a second preset threshold, or the voltage difference is greater than or equal to a third preset threshold, determining a balancing index and determining a battery to be balanced corresponding to the balancing index; Determining a balancing parameter of the battery to be balanced according to the balancing index and the charge state of the battery to be balanced; According to the balancing parameters, the balancing device is controlled to perform battery balancing processing on the battery to be balanced.

6. The mobile charging method according to claim 1, further comprising: Receive device status information of the device to be charged and current discharge status information of the power supply device; Based on the device status information and the current discharge status information, determine a discharge module in the power supply device for charging the device to be charged, and send a charging permission signal to the device to be charged, wherein the charging permission signal is used to instruct the device to be charged to turn on the charging module; A discharge instruction is sent to the power supply device, wherein the discharge instruction carries information of the discharge module, and the discharge instruction is used to instruct the power supply device to turn on the discharge module to charge the charging module.

7. The mobile charging method according to claim 1, wherein the mobile charging and inspection device further comprises a battery assembly and a discharge gun, wherein the battery assembly is electrically connected to the DCDC converter, the mobile charging and inspection device is physically connected to the power supply device through the discharge gun, and the battery assembly is used to supply power to the battery management system of the power supply device through the discharge gun; Accordingly, the method further comprises: Receive the vehicle control message sent by the power supply equipment through the battery management system.

8. A mobile charging device, applied to a mobile charging and testing device, the mobile charging and testing device comprising a DCDC converter and a charging gun, the DCDC converter being electrically connected to the charging gun, the device comprising: A receiving module, configured to receive a charging request sent by the device to be charged through the charging gun, wherein the charging request carries a charging requirement message; a conversion module, configured to convert the DC power supply of the power supply device according to the charging requirement voltage carried in the charging requirement message through the DCDC converter to obtain the converted DC power supply; The charging module is configured to transmit the converted DC power to the charging gun, and charge the device to be charged through the charging gun.

9. A computing device comprising: Memory and processor; The memory is used to store computer-executable instructions, and the processor is used to execute the computer-executable instructions. When the computer-executable instructions are executed by the processor, the steps of the mobile charging method according to any one of claims 1 to 7 are implemented.

10. A computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions, when executed by a processor, implement the steps of the mobile charging method according to any one of claims 1 to 7.

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