Two-wheeler battery charging method and intermediate charger

Abstract

The application provides a two-wheeled vehicle battery charging method and an intermediate charger. The method comprises the following steps: the intermediate charger is electrically connected and in communication connection with a two-wheeled vehicle battery and a charging pile of an electric vehicle; the intermediate charger constructs a virtual high-voltage battery according to the voltage of each cell of the two-wheeled vehicle battery and the total voltage of the battery, the total voltage of the virtual high-voltage battery matches the input voltage range of the second electric interface of the intermediate charger; the intermediate charger sends the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery to the charging pile of the electric vehicle in a charging request; and the intermediate charger receives the electric signal output by the charging pile of the electric vehicle, converts the voltage and current of the electric signal into the requested voltage and current of the two-wheeled vehicle battery, and outputs the converted electric signal to the two-wheeled vehicle battery. The application realizes that the charging pile of the electric vehicle charges the two-wheeled vehicle battery.

Description

Technical Field

[0001] This application relates to the field of battery charging technology, and more particularly to a method for charging two-wheeled vehicle batteries and an intermediate charger. Background Technology

[0002] Currently, two-wheeled vehicles generally use lithium batteries for power. Lithium batteries typically have a low output voltage, such as 48V, 60V, 72V, or 96V. When charging the batteries of two-wheeled vehicles, a separate AC-DC (alternating current to direct current) charger is usually used to convert the 220V AC mains voltage to 60V, 72V, or 96V to charge the batteries.

[0003] With the vigorous development of new energy, the deployment of electric vehicle charging stations has been gradually rolled out. As the number of stations increases, if electric vehicle charging stations can also charge the batteries of two-wheeled vehicles, it will bring great convenience to people.

[0004] National standard electric vehicle charging stations generally have a higher output voltage, such as 500V or 750V. However, according to the charging station's technical protocol, the minimum output voltage can only reach 200V, which is significantly different from the output voltage of two-wheeled vehicle batteries. Even if the protocol is compatible, the following reasons may prevent the charging of two-wheeled vehicle batteries:

[0005] 1. Because the output voltage of the battery of a two-wheeled vehicle is low, it may cause the electric vehicle charging station to mistakenly think that there is a short circuit and issue an alarm.

[0006] Second, electric vehicle charging stations will monitor the battery voltage messages sent by two-wheeled vehicles. When the battery voltage of the two-wheeled vehicle is read to be only 48V, 60V, 72V, or 96V, the output current will also be stopped. Summary of the Invention

[0007] This application proposes a two-wheeled vehicle battery charging method and an intermediate charger to enable electric vehicle charging stations to charge two-wheeled vehicle batteries.

[0008] The technical solution of this application embodiment is implemented as follows:

[0009] A method for charging a two-wheeled vehicle battery, the method comprising:

[0010] The intermediate charger establishes an electrical and communication connection with the two-wheeled vehicle battery; and also establishes an electrical and communication connection with the electric vehicle charging station; wherein, the output voltage range of the first electrical interface of the intermediate charger is adapted to the output voltage range of the two-wheeled vehicle battery, and the input voltage range of the second electrical interface of the intermediate charger is adapted to the output voltage range of the electric vehicle charging station, wherein the first electrical interface is used to connect to the electrical interface of the two-wheeled vehicle battery, and the second electrical interface is used to connect to the electrical interface of the electric vehicle charging station;

[0011] The intermediate charger receives the battery status report message sent by the two-wheeled vehicle battery, and extracts the voltage of each cell of the two-wheeled vehicle battery, the total battery voltage, the requested voltage and requested current of the two-wheeled vehicle battery from the battery status report message;

[0012] The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle battery and the total battery voltage. The total voltage of this virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger.

[0013] The intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and sends the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle.

[0014] The intermediate charger receives the electrical signal output from the electric vehicle's charging station, converts the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle's battery, and outputs the converted electrical signal to the two-wheeled vehicle's battery.

[0015] The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including:

[0016] The intermediate charger calculates the ratio of the maximum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, and rounds this ratio down to obtain the first integer; it also calculates the ratio of the minimum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, and rounds this ratio up to obtain the second integer.

[0017] The intermediate charger selects a third integer, which is no less than the second integer and no greater than the first integer, and connects the third integer number of two-wheeled vehicle batteries in series to obtain a virtual high-voltage battery.

[0018] The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including:

[0019] When the maximum input voltage of the second electrical interface of the intermediate charger is lower than the maximum output voltage of the electric vehicle's charging pile, the intermediate charger calculates the difference between the maximum input voltage of the second interface and the total voltage of the two-wheeled vehicle's battery. Then, it calculates the ratio between this difference and the average voltage of each cell in the two-wheeled vehicle's battery, and rounds this ratio down to obtain the fourth integer.

[0020] The intermediate charger determines the structure of the virtual high-voltage battery as follows: the fourth integer number of batteries with voltage equal to the average voltage of each cell of the two-wheeled vehicle battery are connected in series and then connected in series with the two-wheeled vehicle battery.

[0021] After the intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and before sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle, the process further includes:

[0022] The intermediate charger calculates the output power of the two-wheeled vehicle battery based on the requested voltage and current of the two-wheeled vehicle battery. Based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger, it calculates the charging power requested by the virtual high-voltage battery. Based on the charging power requested by the virtual high-voltage battery and the charging voltage requested by the virtual high-voltage battery, it calculates the charging current requested by the virtual high-voltage battery.

[0023] The step of sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle includes:

[0024] The charging voltage and charging current requested by the virtual high-voltage battery are carried in the charging request and sent to the charging station of the electric vehicle, so that the charging station of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

[0025] The intermediate charger, after outputting the converted electrical signal to the two-wheeled vehicle battery, further includes:

[0026] The intermediate charger detects that the two-wheeled vehicle's battery is fully charged and sends a stop charging instruction to the electric vehicle's charging station.

[0027] An intermediate charger includes: a first electrical interface, a first communication interface, a second electrical interface, a second communication interface, a microcontroller unit (MCU), and a voltage and current controller. The output voltage range of the first electrical interface is adapted to the output voltage range of a two-wheeled vehicle battery, and the input voltage range of the second electrical interface is adapted to the output voltage range of an electric vehicle charging station.

[0028] The first electrical interface is used to connect to the electrical interface of the two-wheeled vehicle battery;

[0029] The first communication interface is used to connect to the communication interface of the two-wheeled vehicle battery;

[0030] The second electrical interface is used to connect to the electrical interface of the electric vehicle charging station;

[0031] The second communication interface is used to connect to the communication interface of the electric vehicle charging station;

[0032] The MCU receives battery status reports from the two-wheeled vehicle battery, parses the voltage of each cell, the total battery voltage, the requested voltage, and the requested current from the battery status report. Based on the voltage of each cell and the total battery voltage, a virtual high-voltage battery is constructed. The total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. The total voltage of the virtual high-voltage battery is used as the requested charging voltage of the virtual high-voltage battery, and the requested charging voltage is sent to the charging station of the electric vehicle in the charging request.

[0033] The voltage and current controller is used to receive the electrical signal output from the charging pile of the electric vehicle, convert the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle battery, and output the converted electrical signal to the two-wheeled vehicle battery.

[0034] The MCU constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including:

[0035] Calculate the ratio of the maximum input voltage of the second electrical interface to the total voltage of the two-wheeled vehicle battery, and round down to obtain the first integer; calculate the ratio of the minimum input voltage of the second electrical interface to the total voltage of the two-wheeled vehicle battery, and round up to obtain the second integer; select a third integer, which is not less than the second integer and not greater than the first integer, and connect the third integer number of two-wheeled vehicle batteries in series to obtain a virtual high-voltage battery.

[0036] The MCU constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including:

[0037] When the maximum input voltage of the second electrical interface is lower than the maximum output voltage of the electric vehicle's charging pile, calculate the difference between the maximum input voltage of the second interface and the total voltage of the two-wheeled vehicle's battery. Then calculate the ratio between this difference and the average voltage of each cell in the two-wheeled vehicle's battery. Round this ratio down to obtain the fourth integer. Determine the structure of the virtual high-voltage battery as follows: the fourth integer number of batteries with a voltage equal to the average voltage of each cell in the two-wheeled vehicle's battery are connected in series and then connected in series with the two-wheeled vehicle's battery.

[0038] After the MCU uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and before sending the requested charging voltage to the charging station of the electric vehicle in the charging request, the following further steps are included:

[0039] Based on the requested voltage and current of the two-wheeled vehicle battery, the output power of the two-wheeled vehicle battery is calculated. Based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger, the requested charging power of the virtual high-voltage battery is calculated. Based on the requested charging power and the requested charging voltage of the virtual high-voltage battery, the requested charging current of the virtual high-voltage battery is calculated.

[0040] The MCU sends the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle, including:

[0041] The charging voltage and charging current requested by the virtual high-voltage battery are carried in the charging request and sent to the charging station of the electric vehicle, so that the charging station of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

[0042] The MCU is further used for:

[0043] When the two-wheeled vehicle's battery is detected to be fully charged, a stop charging instruction is sent to the electric vehicle's charging station.

[0044] In this embodiment, after establishing electrical and communication connections with the two-wheeled vehicle battery and the electric vehicle charging station, the intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle battery and the total battery voltage. The total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. The total voltage of the virtual high-voltage battery is then carried in the charging request as the charging voltage requested by the virtual high-voltage battery and sent to the electric vehicle charging station. Subsequently, when the electric signal output by the electric vehicle charging station is received, the voltage and current of the electric signal are converted into the requested voltage and current of the two-wheeled vehicle battery, and the converted electric signal is output to the two-wheeled vehicle battery, thereby enabling the electric vehicle charging station to charge the two-wheeled vehicle battery. Attached Figure Description

[0045] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0046] Figure 1 A flowchart of a two-wheeled vehicle battery charging method provided in an embodiment of this application;

[0047] Figure 2 A schematic diagram illustrating the connection between the intermediate charger and the battery of a two-wheeled vehicle and the charging pile of an electric vehicle, as provided in the embodiments of this application;

[0048] Figure 3A flowchart of a two-wheeled vehicle battery charging method provided in another embodiment of this application;

[0049] Figure 4 This is a schematic diagram of the structure of an intermediate charger provided in an embodiment of this application. Detailed Implementation

[0050] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0051] The terms “first,” “second,” “third,” “fourth,” etc. (if present) in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a particular order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms “comprising” and “having,” and any variations thereof, are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0052] The technical solution of this application will be described in detail below with reference to specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments.

[0053] Figure 1 The flowchart of the two-wheeled vehicle battery charging method provided in this application embodiment shows the specific steps as follows:

[0054] Step 101: The intermediate charger establishes an electrical and communication connection with the two-wheeled vehicle battery; and the intermediate charger establishes an electrical and communication connection with the electric vehicle charging station; wherein, the output voltage range of the first electrical interface of the intermediate charger is adapted to the output voltage range of the two-wheeled vehicle battery, and the input voltage range of the second electrical interface of the intermediate charger is adapted to the output voltage range of the electric vehicle charging station, wherein the first electrical interface is used to connect to the electrical interface of the two-wheeled vehicle battery, and the second electrical interface is used to connect to the electrical interface of the electric vehicle charging station.

[0055] In practical applications, when designing an intermediate charger, the output voltage range of the first electrical interface can be determined based on the output voltage of the compatible two-wheeled vehicle battery. For example, if it is to adapt to three types of two-wheeled vehicle batteries with output voltages of 36V, 48V, and 60V respectively, then the output voltage range of the first electrical interface must meet the following requirements: not less than the minimum output voltage of the 36V two-wheeled vehicle battery (generally 25V) and not greater than the maximum output voltage of the 60V two-wheeled vehicle battery (generally 70V). The input voltage range of the second electrical interface should meet the following requirement: less than or equal to the output voltage range of the electric vehicle charging station.

[0056] Figure 2 This is a schematic diagram illustrating the connection between the intermediate charger and the battery of a two-wheeled vehicle and the charging pile of an electric vehicle, as provided in an embodiment of this application. Figure 2 As shown, the positive terminal V+ of the intermediate charger's output interface is connected to the positive terminal V+ of the two-wheeled vehicle's battery interface, and the negative terminal V- of the intermediate charger's output interface is connected to the negative terminal V- of the two-wheeled vehicle's battery interface. One communication interface of the intermediate charger is connected to the communication interface of the two-wheeled vehicle's battery. The positive terminal V+ of the intermediate charger's input interface is connected to the positive terminal V+ of the electric vehicle's charging station interface, and the negative terminal V- of the intermediate charger's input interface is connected to the negative terminal V- of the electric vehicle's charging station interface. The other communication interface of the intermediate charger is connected to the communication interface of the electric vehicle's charging station. It should be noted that... Figure 2 In the process, the intermediate charger has only one communication interface between itself and the charging station of the two-wheeled vehicle battery and the electric vehicle. In practical applications, the intermediate charger may also have two communication interfaces between itself and the charging station of the two-wheeled vehicle battery or the electric vehicle. In this case, simply connect the two communication interfaces of the intermediate charger to the two communication interfaces of the charging station of the two-wheeled vehicle battery or the electric vehicle respectively.

[0057] Step 102: The intermediate charger receives the battery status report message from the two-wheeled vehicle battery, and parses the voltage of each cell of the two-wheeled vehicle battery, the total battery voltage, the requested voltage and requested current of the two-wheeled vehicle battery from the battery status report message.

[0058] In practical applications, the battery status reporting message also includes the battery code, battery material type, and temperature of each cell of the two-wheeled vehicle battery.

[0059] The total battery voltage is the voltage of the entire battery pack in a two-wheeled vehicle.

[0060] Step 103: The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle battery and the total battery voltage. The total voltage of this virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. 。

[0061] Step 104: The intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and sends the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle.

[0062] Step 105: The intermediate charger receives the electrical signal output from the electric vehicle's charging station, converts the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle's battery, and outputs the converted electrical signal to the two-wheeled vehicle's battery.

[0063] Specifically, in step 105, the voltage and current of the electrical signal are converted into the requested voltage and current of the two-wheeled vehicle battery, including: the intermediate charger converts the current of the electrical signal into the requested current of the two-wheeled vehicle battery, while controlling the voltage of the electrical signal to never exceed the requested voltage of the two-wheeled vehicle battery.

[0064] In the above embodiments, after establishing electrical and communication connections with the two-wheeled vehicle battery and the electric vehicle charging station, the intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage. The total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. The total voltage of the virtual high-voltage battery is carried in the charging request as the charging voltage requested by the virtual high-voltage battery and sent to the electric vehicle charging station. Then, when the electric signal output by the electric vehicle charging station is received, the voltage and current of the electric signal are converted into the requested voltage and current of the two-wheeled vehicle battery, and the converted electric signal is output to the two-wheeled vehicle battery, thereby realizing the charging of the two-wheeled vehicle battery by the electric vehicle charging station.

[0065] In one optional embodiment, in step 103, the intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage. This includes: the intermediate charger calculating the ratio of the maximum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, rounding the ratio down to obtain a first integer; calculating the ratio of the minimum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, rounding the ratio up to obtain a second integer; and selecting a third integer, wherein the third integer is not less than the second integer and not greater than the first integer, and connecting the third integer number of two-wheeled vehicle batteries in series to obtain the virtual high-voltage battery.

[0066] For example: A two-wheeled vehicle battery has n cells, and the voltages of the n cells are respectively V. c1 ~V cn The temperatures of the n battery cells are T1 to T2 respectively. nThe total battery voltage is V0. The first integer is calculated to be 6, the second integer to be 2, and the third integer to be 2. Connecting the two two-wheeled vehicle batteries in series creates a virtual high-voltage battery. This virtual high-voltage battery has 2n cells, and the voltages of these 2n cells are V... c1 ~V cn V c1 ~V cn The temperatures of the 2n cells are T1 to T2 respectively. n T1~T n The total voltage of the virtual high-voltage battery is 2V0.

[0067] In one optional embodiment, in step 103, the intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage. This includes: when the maximum input voltage of the second interface of the intermediate charger is lower than the maximum output voltage of the charging pile of the electric vehicle, the intermediate charger calculates the difference between the maximum input voltage of the second interface and the total battery voltage of the two-wheeled vehicle battery, then calculates the ratio between the difference and the average voltage of each cell of the two-wheeled vehicle battery, and rounds the ratio down to obtain a fourth integer; the intermediate charger determines that the structure of the virtual high-voltage battery is: the fourth integer number of batteries with a voltage equal to the average voltage of each cell of the two-wheeled vehicle battery are connected in series and then connected in series with the two-wheeled vehicle battery.

[0068] For example: The maximum input voltage of the second interface of the intermediate charger is V. max V max The average voltage of the n cells in the two-wheeled vehicle battery is V, which is lower than the maximum output voltage of the charging station for electric vehicles. avg If the total battery voltage of the two-wheeled vehicle is V0, then calculate... in, The floor function is used for rounding down; therefore, the final constructed virtual high-voltage battery consists of N cells with a voltage of V. avg The cells are connected in series and then connected in series with the battery of the two-wheeled vehicle, resulting in a total of N+n cells.

[0069] In an optional embodiment, step 104, after the intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery and before sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging pile of the electric vehicle, further includes: the intermediate charger calculates the output power of the two-wheeled vehicle battery based on the requested voltage and requested current of the two-wheeled vehicle battery, calculates the charging power requested by the virtual high-voltage battery based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger, and calculates the charging current requested by the virtual high-voltage battery based on the charging power requested by the virtual high-voltage battery and the charging voltage requested by the virtual high-voltage battery;

[0070] Furthermore, in step 104, sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle includes: sending the charging voltage and charging current requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle, so that the charging station of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

[0071] Wherein, the output power of the two-wheeled vehicle battery = the requested voltage of the two-wheeled vehicle battery * the requested current, the requested charging power of the virtual high-voltage battery = the output power of the two-wheeled vehicle battery / the conversion efficiency of the intermediate charger, and the requested charging current of the virtual high-voltage battery = the requested charging power of the virtual high-voltage battery / the requested charging voltage of the virtual high-voltage battery.

[0072] In one optional embodiment, after the intermediate charger outputs the converted electrical signal to the two-wheeled vehicle battery in step 105, the process further includes: the intermediate charger detecting that the two-wheeled vehicle battery is fully charged, and sending a stop charging instruction to the charging station of the electric vehicle.

[0073] Figure 3 A flowchart of a two-wheeled vehicle battery charging method provided in another embodiment of this application is shown, and its specific steps are as follows:

[0074] Step 301: The electrical interface and communication interface of the intermediate charger are connected to the electrical interface and communication interface of the two-wheeled vehicle battery, respectively.

[0075] Step 302: When the two-wheeled vehicle battery detects that the intermediate charger has been inserted, it turns on the discharge MOS (field-effect transistor) to supply power to the intermediate charger.

[0076] Step 303: The electrical interface and communication interface of the intermediate charger are connected to the electrical interface and communication interface of the electric vehicle's charging pile, respectively.

[0077] Step 304: When the charging station of the electric vehicle detects that the intermediate charger has been inserted, it sends a handshake message to the intermediate charger.

[0078] Step 305: The two-wheeled vehicle battery sends a battery status reporting message to the intermediate charger. This message carries the voltage of each cell of the two-wheeled vehicle battery, the total battery voltage, and the requested voltage and current of the two-wheeled vehicle battery.

[0079] Step 306: The intermediate charger receives the handshake message and returns the handshake message to the charging station of the electric vehicle.

[0080] Step 307: The intermediate charger receives the battery status report message, parses the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage from the battery status report message, and constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage. The total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger.

[0081] Step 308: The intermediate charger calculates the output power of the two-wheeled vehicle battery based on its requested voltage and current. Based on the battery's output power and the charger's conversion efficiency, it calculates the requested charging power of the virtual high-voltage battery. Based on the requested charging power and voltage, it calculates the requested charging current. The intermediate charger uses the total voltage of the virtual high-voltage battery as the requested charging voltage and sends the requested voltage and current to the electric vehicle's charging station in the charging request.

[0082] Step 309: The electric vehicle's charging station receives a charging request and, based on the charging voltage and current requested by the virtual high-voltage battery carried in the request, outputs a corresponding electrical signal to the intermediate charger.

[0083] Step 310: The intermediate charger receives the electrical signal, converts the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle battery, and outputs the converted electrical signal to the two-wheeled vehicle battery.

[0084] Figure 4 The schematic diagram of the intermediate charger provided in this application embodiment mainly includes: a first electrical interface 41, a first communication interface 42, a second electrical interface 43, a second communication interface 44, an MCU 45, and a voltage and current controller 46. The output voltage range of the first electrical interface 41 is adapted to the output voltage range of a two-wheeled vehicle battery, and the input voltage range of the second electrical interface 43 is adapted to the output voltage range of an electric vehicle charging station.

[0085] The first electrical interface 41 is used to connect to the electrical interface of the two-wheeled vehicle battery.

[0086] The first communication interface 42 is used to connect to the communication interface of the two-wheeled vehicle battery.

[0087] The second electrical interface 43 is used to connect to the electrical interface of the electric vehicle charging station.

[0088] The second communication interface 44 is used to connect to the communication interface of the electric vehicle charging station.

[0089] MCU 45 is used to receive battery status reporting messages from the two-wheeled vehicle battery from the first communication interface 42, and to parse the voltage of each cell of the two-wheeled vehicle battery, the total battery voltage, the requested voltage and the requested current of the two-wheeled vehicle battery from the battery status reporting message; based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage, a virtual high-voltage battery is constructed, and the total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger; the total voltage of the virtual high-voltage battery is used as the charging voltage requested by the virtual high-voltage battery, and the charging voltage requested by the virtual high-voltage battery is carried in the charging request and sent to the charging pile of the electric vehicle through the second communication interface 44.

[0090] The voltage and current controller 46 is used to receive the electrical signal output from the charging pile of the electric vehicle from the second electrical interface 43, convert the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle battery, and output the converted electrical signal to the two-wheeled vehicle battery through the first electrical interface 41.

[0091] In one optional embodiment, the MCU 45 constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage, including: calculating the ratio of the maximum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, rounding the ratio down to obtain a first integer; calculating the ratio of the minimum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, rounding the ratio up to obtain a second integer; selecting a third integer, wherein the third integer is not less than the second integer and not greater than the first integer, and connecting the third integer number of two-wheeled vehicle batteries in series to obtain the virtual high-voltage battery.

[0092] In one optional embodiment, the MCU 45 constructs a virtual high-voltage battery based on the voltage of each cell of the two-wheeled vehicle battery and the total battery voltage, including: when the maximum input voltage of the second interface 43 is lower than the maximum output voltage of the electric vehicle charging pile, calculating the difference between the maximum input voltage of the second interface 43 and the total battery voltage of the two-wheeled vehicle battery, then calculating the ratio between the difference and the average voltage of each cell of the two-wheeled vehicle battery, rounding the ratio down to obtain a fourth integer; determining the structure of the virtual high-voltage battery as follows: the fourth integer number of batteries with a voltage equal to the average voltage of each cell of the two-wheeled vehicle battery are connected in series and then connected in series with the two-wheeled vehicle battery.

[0093] In one optional embodiment, after the MCU 45 uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and before sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging pile of the electric vehicle through the second communication interface 44, the MCU 45 further includes: calculating the output power of the two-wheeled vehicle battery based on the requested voltage and requested current of the two-wheeled vehicle battery; calculating the charging power requested by the virtual high-voltage battery based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger; and calculating the charging current requested by the virtual high-voltage battery based on the charging power requested by the virtual high-voltage battery and the charging voltage requested by the virtual high-voltage battery.

[0094] Furthermore, the MCU 45 carries the charging voltage requested by the virtual high-voltage battery in the charging request and sends it to the charging pile of the electric vehicle through the second communication interface 44, including: carrying the charging voltage and charging current requested by the virtual high-voltage battery in the charging request and sending it to the charging pile of the electric vehicle through the second communication interface 44, so that: the charging pile of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

[0095] In an optional embodiment, the MCU 45 is further configured to: send a stop charging instruction to the charging station of the electric vehicle when it is detected that the two-wheeled vehicle battery is fully charged.

[0096] Those skilled in the art will understand that the features described in the various embodiments and / or claims of this disclosure can be combined and / or combined in various ways, even if such combinations or combinations are not explicitly described in this application. In particular, without departing from the spirit and teachings of this application, the features described in the various embodiments and / or claims of this application can be combined and / or combined in various ways, and all such combinations and / or combinations fall within the scope of this application.

[0097] This document uses specific embodiments to illustrate the principles and implementation methods of this application. The descriptions of the embodiments above are only for the purpose of helping to understand the methods and core ideas of this application, and are not intended to limit this application. For those skilled in the art, changes can be made to the specific implementation methods and application scope based on the ideas, spirit and principles of this application. Any modifications, equivalent substitutions, improvements, etc., made should be included within the scope of protection of this application.

Claims

1. A method for charging a two-wheeled vehicle battery, characterized in that, The method includes: The intermediate charger establishes an electrical and communication connection with the two-wheeled vehicle battery; and also establishes an electrical and communication connection with the electric vehicle charging station; wherein, the output voltage range of the first electrical interface of the intermediate charger is adapted to the output voltage range of the two-wheeled vehicle battery, and the input voltage range of the second electrical interface of the intermediate charger is adapted to the output voltage range of the electric vehicle charging station, wherein the first electrical interface is used to connect to the electrical interface of the two-wheeled vehicle battery, and the second electrical interface is used to connect to the electrical interface of the electric vehicle charging station; The intermediate charger receives the battery status report message sent by the two-wheeled vehicle battery, and extracts the voltage of each cell of the two-wheeled vehicle battery, the total battery voltage, the requested voltage and requested current of the two-wheeled vehicle battery from the battery status report message; The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle battery and the total battery voltage. The total voltage of this virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. The intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and sends the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle. The intermediate charger receives the electrical signal output from the electric vehicle's charging station, converts the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle's battery, and outputs the converted electrical signal to the two-wheeled vehicle's battery. The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including: The intermediate charger calculates the ratio of the maximum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, and rounds this ratio down to obtain the first integer; it also calculates the ratio of the minimum input voltage of the second electrical interface to the total battery voltage of the two-wheeled vehicle battery, and rounds this ratio up to obtain the second integer. The intermediate charger selects a third integer, which is no less than the second integer and no greater than the first integer, and connects the third integer number of two-wheeled vehicle batteries in series to obtain a virtual high-voltage battery.

2. The method according to claim 1, characterized in that, The intermediate charger constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including: When the maximum input voltage of the second electrical interface of the intermediate charger is lower than the maximum output voltage of the electric vehicle's charging pile, the intermediate charger calculates the difference between the maximum input voltage of the second interface and the total voltage of the two-wheeled vehicle's battery. Then, it calculates the ratio between this difference and the average voltage of each cell in the two-wheeled vehicle's battery, and rounds this ratio down to obtain the fourth integer. The intermediate charger determines the structure of the virtual high-voltage battery as follows: the fourth integer number of batteries with voltage equal to the average voltage of each cell of the two-wheeled vehicle battery are connected in series and then connected in series with the two-wheeled vehicle battery.

3. The method according to claim 1, characterized in that, After the intermediate charger uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and before sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle, the process further includes: The intermediate charger calculates the output power of the two-wheeled vehicle battery based on the requested voltage and current of the two-wheeled vehicle battery. Based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger, it calculates the charging power requested by the virtual high-voltage battery. Based on the charging power requested by the virtual high-voltage battery and the charging voltage requested by the virtual high-voltage battery, it calculates the charging current requested by the virtual high-voltage battery. The step of sending the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle includes: The charging voltage and charging current requested by the virtual high-voltage battery are carried in the charging request and sent to the charging station of the electric vehicle, so that the charging station of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

4. The method according to claim 1, characterized in that, The intermediate charger, after outputting the converted electrical signal to the two-wheeled vehicle battery, further includes: The intermediate charger detects that the two-wheeled vehicle's battery is fully charged and sends a stop charging instruction to the electric vehicle's charging station.

5. An intermediate charger, characterized in that, The intermediate charger includes: a first electrical interface, a first communication interface, a second electrical interface, a second communication interface, a microcontroller unit (MCU), and a voltage and current controller. The output voltage range of the first electrical interface is adapted to the output voltage range of the two-wheeled vehicle battery, and the input voltage range of the second electrical interface is adapted to the output voltage range of the electric vehicle charging station. The first electrical interface is used to connect to the electrical interface of the two-wheeled vehicle battery; The first communication interface is used to connect to the communication interface of the two-wheeled vehicle battery; The second electrical interface is used to connect to the electrical interface of the electric vehicle charging station; The second communication interface is used to connect to the communication interface of the electric vehicle charging station; The MCU receives battery status reports from the two-wheeled vehicle battery, parses the voltage of each cell, the total battery voltage, the requested voltage, and the requested current from the battery status report. Based on the voltage of each cell and the total battery voltage, a virtual high-voltage battery is constructed. The total voltage of the virtual high-voltage battery matches the input voltage range of the second electrical interface of the intermediate charger. The total voltage of the virtual high-voltage battery is used as the requested charging voltage of the virtual high-voltage battery, and the requested charging voltage is sent to the charging station of the electric vehicle in the charging request. The voltage and current controller is used to receive the electrical signal output from the charging pile of the electric vehicle, convert the voltage and current of the electrical signal into the requested voltage and current of the two-wheeled vehicle battery, and output the converted electrical signal to the two-wheeled vehicle battery. The MCU constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including: Calculate the ratio of the maximum input voltage of the second electrical interface to the total voltage of the two-wheeled vehicle battery, and round down to obtain the first integer; calculate the ratio of the minimum input voltage of the second electrical interface to the total voltage of the two-wheeled vehicle battery, and round up to obtain the second integer; select a third integer, which is not less than the second integer and not greater than the first integer, and connect the third integer number of two-wheeled vehicle batteries in series to obtain a virtual high-voltage battery.

6. The intermediate charger according to claim 5, characterized in that, The MCU constructs a virtual high-voltage battery based on the voltage of each cell in the two-wheeled vehicle's battery and the total battery voltage, including: When the maximum input voltage of the second electrical interface is lower than the maximum output voltage of the electric vehicle's charging pile, calculate the difference between the maximum input voltage of the second interface and the total voltage of the two-wheeled vehicle's battery. Then calculate the ratio between this difference and the average voltage of each cell in the two-wheeled vehicle's battery. Round this ratio down to obtain the fourth integer. Determine the structure of the virtual high-voltage battery as follows: the fourth integer number of batteries with a voltage equal to the average voltage of each cell in the two-wheeled vehicle's battery are connected in series and then connected in series with the two-wheeled vehicle's battery.

7. The intermediate charger according to claim 5, characterized in that, After the MCU uses the total voltage of the virtual high-voltage battery as the charging voltage requested by the virtual high-voltage battery, and before sending the requested charging voltage to the charging station of the electric vehicle in the charging request, the following further steps are included: Based on the requested voltage and current of the two-wheeled vehicle battery, the output power of the two-wheeled vehicle battery is calculated. Based on the output power of the two-wheeled vehicle battery and the conversion efficiency of the intermediate charger, the requested charging power of the virtual high-voltage battery is calculated. Based on the requested charging power and the requested charging voltage of the virtual high-voltage battery, the requested charging current of the virtual high-voltage battery is calculated. The MCU sends the charging voltage requested by the virtual high-voltage battery in the charging request to the charging station of the electric vehicle, including: The charging voltage and charging current requested by the virtual high-voltage battery are carried in the charging request and sent to the charging station of the electric vehicle, so that the charging station of the electric vehicle outputs an electrical signal that is compatible with the charging voltage and charging current requested by the virtual high-voltage battery.

8. The intermediate charger according to claim 5, characterized in that, The MCU is further used for: When the two-wheeled vehicle's battery is detected to be fully charged, a stop charging instruction is sent to the electric vehicle's charging station.

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