Vehicle charging circuit, charging method and vehicle

Abstract

The present application discloses a charging circuit, a charging method and a vehicle for a vehicle, and relates to the technical field of new energy vehicles. The charging circuit includes: at least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, a rechargeable battery connected to the charging circuit unit, and a control unit; the at least two charging interfaces are used to access a charging device for charging the vehicle; the control unit is used to control the charging circuit unit and the at least two charging interfaces to form a charging circuit when it is determined that the at least two charging interfaces are connected to the charging device; the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery. The present application can improve the time efficiency of boosting and replenishing the vehicle battery by connecting at least two charging interfaces in series to achieve boosting and replenishing energy.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to a charging circuit, a charging method and a vehicle. Background Art

[0002] The existing charging equipment has the problem of inconsistent voltage platforms when recharging vehicle batteries. In order to solve this problem, the relevant technology adds a boost device at the vehicle end. However, the boost device only realizes the function of recharging the vehicle battery, and its time efficiency cannot match the direct charging efficiency. That is, it takes a long time to recharge the vehicle battery through the boost device, and the time efficiency of boost recharging is low. Summary of the invention

[0003] In response to the above technical problems, the embodiments of the present application provide a charging circuit, a charging method and a vehicle for a vehicle, which can improve the time efficiency of boosting and replenishing energy for the vehicle battery.

[0004] The technical solution of this application is implemented as follows:

[0005] In a first aspect, an embodiment of the present application provides a charging circuit for a vehicle, comprising: at least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, a rechargeable battery connected to the charging circuit unit, and a control unit;

[0006] The at least two charging interfaces are used to connect to a charging device for charging the vehicle;

[0007] The control unit is used to control the charging circuit unit and the at least two charging interfaces to form a charging circuit when it is determined that the at least two charging interfaces are connected to the charging device; the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery.

[0008] In some embodiments, the at least two charging interfaces include a first charging interface and a second charging interface;

[0009] The charging circuit unit includes a first switch, a second switch, a third switch, a first resistor and a second resistor; the first switch includes a first end and a second end, the second switch includes a third end and a fourth end, the third switch includes a fifth end and a sixth end, the first resistor includes a seventh end and an eighth end, and the second resistor includes a ninth end and a tenth end;

[0010] The first end is connected to the positive end of the first charging interface, and the second end is connected to the seventh end;

[0011] The third end and the fifth end are both connected to the negative end of the first charging interface, and the fourth end is connected to the positive end of the second charging interface;

[0012] The eighth end and the ninth end are both connected to the sixth end, and the tenth end is connected to the negative end of the second charging interface.

[0013] In some embodiments, the control unit is specifically configured to:

[0014] When it is determined that both the first charging interface and the second charging interface are connected to the charging device, controlling the second switch and the third switch to be turned on, and sending a first message to the charging device connected to the second charging interface, where the first message is used to instruct the charging device connected to the second charging interface to output in a constant voltage mode;

[0015] After determining that the charging device connected to the second charging interface outputs in constant voltage mode, the third switch is controlled to be disconnected, the first switch is controlled to be turned on, and a second message is sent to the charging device connected to the first charging interface, where the second message is used to instruct the charging device connected to the first charging interface to output in constant current mode.

[0016] In some embodiments, the control unit is further specifically configured to:

[0017] After determining that the charging device connected to the second charging interface outputs in a constant voltage mode and the charging device connected to the first charging interface outputs in a constant current mode, a first current output by the charging device connected to the first charging interface and a second current output by the charging device connected to the second charging interface are adjusted so that the second current is greater than the first current.

[0018] In some embodiments, the control unit is further specifically configured to:

[0019] After determining that the charging device connected to the second charging interface outputs in constant voltage mode, a third message is sent to the charging device connected to the second charging interface, wherein the third message is used to instruct the charging device connected to the second charging interface to control the constant voltage value output in constant voltage mode to be a first set value.

[0020] In some embodiments, the first message is further used to instruct the charging device connected to the second charging interface to control the maximum current value output in the constant voltage mode to be a second set value.

[0021] In some embodiments, the second message is further used to instruct the charging device connected to the first charging interface to control the constant current value output in the constant current mode to be a third set value.

[0022] In some embodiments, the second message is further used to instruct the charging device connected to the first charging interface to control the maximum voltage value output in the constant current mode to be a fourth set value.

[0023] In a second aspect, an embodiment of the present application provides a method for charging a vehicle, wherein the vehicle includes a charging circuit, the charging circuit includes at least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, and a rechargeable battery connected to the charging circuit unit; the method includes:

[0024] When it is determined that the at least two charging interfaces are connected to a charging device for charging the vehicle, controlling the charging circuit unit and the at least two charging interfaces to form a charging loop; the at least two charging interfaces are connected in series in the charging loop;

[0025] Based on the charging circuit, the rechargeable battery is charged.

[0026] In a third aspect, an embodiment of the present application provides a vehicle, comprising the charging circuit described in the first aspect.

[0027] The vehicle charging circuit, charging method and vehicle provided in the embodiments of the present application control the charging circuit unit and the at least two charging interfaces in the charging circuit to form a charging circuit when it is determined that at least two charging interfaces in the charging circuit are connected to charging devices for charging the vehicle, and the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery; that is, the embodiments of the present application can realize the boosting and energy replenishment of the vehicle battery by using at least two charging devices in series by connecting at least two charging interfaces in series. Compared with the technology of adding a boosting device at the vehicle end, the embodiments of the present application can improve the time efficiency of boosting and energy replenishment of the vehicle battery. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 One of the structural schematic diagrams of a charging circuit of a vehicle provided in an embodiment of the present application;

[0030] Figure 2 A second structural schematic diagram of a charging circuit for a vehicle provided in an embodiment of the present application;

[0031] Figure 3One of the flow charts of a vehicle charging method provided in an embodiment of the present application;

[0032] Figure 4 The second flowchart of a vehicle charging method provided in an embodiment of the present application.

[0033] Reference numerals:

[0034] 101: charging interface; 102: charging circuit unit; 103: rechargeable battery; 104: control unit. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0036] It should be noted that in the description of the embodiments of the present application, the terms "first", "second", etc. are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of the same type, and the number of objects is not limited. For example, the first object can be one or more.

[0037] The following is an illustrative introduction to the charging circuit, charging method and vehicle provided in the embodiments of the present application in conjunction with the drawings in the embodiments of the present application.

[0038] Figure 1 One of the structural schematic diagrams of a charging circuit of a vehicle provided in an embodiment of the present application is as follows: Figure 1 As shown, the charging circuit includes: at least two charging interfaces 101, a charging circuit unit 102 connected to the at least two charging interfaces 101, a rechargeable battery 103 connected to the charging circuit unit 102, and a control unit 104;

[0039] The at least two charging interfaces 101 are used to connect to charging equipment for charging the vehicle;

[0040] The control unit 104 is used to control the charging circuit unit 102 and the at least two charging interfaces 101 to form a charging circuit when it is determined that the at least two charging interfaces 101 are connected to the charging device; the at least two charging interfaces 101 are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery 103.

[0041] In some embodiments, at least two charging interfaces 101 in the charging circuit are electrically connected to the charging circuit unit 102 .

[0042] In some embodiments, the charging circuit unit 102 in the charging circuit is electrically connected to the rechargeable battery 103 .

[0043] In some embodiments, the control unit 104 in the charging circuit is electrically connected to the charging circuit unit 102 .

[0044] In some embodiments, the control unit 104 in the charging circuit is communicatively connected to at least two charging interfaces 101 .

[0045] It should be noted that at least two charging interfaces 101 in the charging circuit can be connected to a charging device for charging the vehicle, and the charging device can be a charging gun or a charging pile, which is not specifically limited in the embodiment of the present application.

[0046] It should be noted that the control unit 104 in the charging circuit can control the charging circuit unit 102 so that the charging circuit unit 102 and at least two charging interfaces 101 form a charging circuit, and the at least two charging interfaces 101 are connected in series in the charging circuit, so that the rechargeable battery 103 can be charged based on the charging circuit.

[0047] It can be understood that by connecting at least two charging interfaces 101 in series, the vehicle battery can be charged using at least two charging devices connected in series. At least two charging devices connected in series can achieve the function of boosting, thereby improving the time efficiency of vehicle charging.

[0048] It can be understood that the charging circuit of the vehicle provided in the embodiment of the present application controls the charging circuit unit and the at least two charging interfaces in the charging circuit to form a charging circuit when it is determined that at least two charging interfaces in the charging circuit are connected to the charging device for charging the vehicle, and the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery; that is, by connecting at least two charging interfaces in series, the embodiment of the present application can realize the boosting and energy replenishment of the vehicle battery by using at least two charging devices in series. Compared with the technology of adding a boosting device at the vehicle end, the embodiment of the present application can improve the time efficiency of boosting and energy replenishment for the vehicle battery.

[0049] In some embodiments, the at least two charging interfaces 101 include a first charging interface and a second charging interface;

[0050] The charging circuit unit 102 includes a first switch, a second switch, a third switch, a first resistor and a second resistor; the first switch includes a first end and a second end, the second switch includes a third end and a fourth end, the third switch includes a fifth end and a sixth end, the first resistor includes a seventh end and an eighth end, and the second resistor includes a ninth end and a tenth end;

[0051] The first end is connected to the positive end of the first charging interface, and the second end is connected to the seventh end;

[0052] The third end and the fifth end are both connected to the negative end of the first charging interface, and the fourth end is connected to the positive end of the second charging interface;

[0053] The eighth end and the ninth end are both connected to the sixth end, and the tenth end is connected to the negative end of the second charging interface.

[0054] In the embodiment of the present application, the charging circuit of the vehicle includes two charging interfaces, namely, a first charging interface and a second charging interface; and the charging circuit unit 102 in the charging circuit of the vehicle includes a first switch, a second switch, a third switch, a first resistor and a second resistor; wherein, one end (i.e., the first end) of the first switch is connected to the positive end of the first charging interface, and the other end (i.e., the second end) of the first switch is connected to one end (i.e., the seventh end) of the first resistor; one end (i.e., the third end) of the second switch and one end (i.e., the fifth end) of the third switch are both connected to the negative end of the first charging interface, and the other end (i.e., the fourth end) of the second switch is connected to the positive end of the second charging interface; the other end (i.e., the eighth end) of the first resistor and one end (i.e., the ninth end) of the second resistor are both connected to the other end (i.e., the sixth end) of the third switch, and the other end (i.e., the tenth end) of the second resistor is connected to the negative end of the second charging interface.

[0055] For example, Figure 2 The second structural diagram of a charging circuit of a vehicle provided in an embodiment of the present application is as follows: Figure 2 As shown, the charging circuit includes a gun socket A and a gun socket B (equivalent to the first charging interface and the second charging interface mentioned above), switches SW1, SW2 and SW3 (equivalent to the first switch, the second switch and the third switch mentioned above), and resistors R1 and R2 (equivalent to the first resistor and the second resistor mentioned above); in addition, the charging circuit also includes switches SW4, SW5, SW6 and a resistor R3, and SW4 and R3 are connected in series, and SW5 is connected in parallel with SW4 and R3 connected in series.

[0056] It should be noted that new energy vehicles usually need to be pre-charged before high voltage is powered on. Pre-charging is to prevent the impact of excessive charging current on the positive relay. In other words, the role of the pre-charging process of new energy vehicles is to charge the pre-charge capacitor of the motor controller to reduce the spark arc when the high-voltage relay is closed, avoid high-voltage shock damage to high-voltage components, and improve the safety of the high-voltage system.

[0057] exist Figure 2 In the charging circuit shown, pre-charging can be achieved by turning on SW4 and SW6. The resistor R3 connected in series with SW4 can control the current so that the current is less than a set value to avoid excessive current affecting the positive relay. After the pre-charging is completed, disconnect SW4 and close SW5 to complete the high voltage power-on.

[0058] Furthermore, it is understandable that Figure 2 The resistors R1 and R2 in the circuit have a voltage-dividing function, and can divide the battery pack voltage of the vehicle into half of the battery pack voltage at SW3. Since the embodiment of the present application ultimately needs to connect the A gun socket and the B gun socket in series to achieve voltage boost, it is necessary to divide a portion of the battery pack voltage for use.

[0059] In some embodiments, the control unit 104 is specifically configured to:

[0060] When it is determined that both the first charging interface and the second charging interface are connected to the charging device, controlling the second switch and the third switch to be turned on, and sending a first message to the charging device connected to the second charging interface, where the first message is used to instruct the charging device connected to the second charging interface to output in a constant voltage mode;

[0061] After determining that the charging device connected to the second charging interface outputs in constant voltage mode, the third switch is controlled to be disconnected, the first switch is controlled to be turned on, and a second message is sent to the charging device connected to the first charging interface, where the second message is used to instruct the charging device connected to the first charging interface to output in constant current mode.

[0062] In an embodiment of the present application, when the charging circuit of the vehicle includes a first charging interface and a second charging interface, if it is determined that both the first charging interface and the second charging interface are connected to a charging device, the control unit 104 controls the second switch and the third switch in the charging circuit unit 102 to be turned on, and sends a first message to the charging device connected to the second charging interface, where the first message is used to instruct the charging device connected to the second charging interface to output in a constant voltage mode; and after determining that the charging device connected to the second charging interface is outputting in a constant voltage mode, the third switch is controlled to be disconnected, the first switch is controlled to be turned on, and a second message is sent to the charging device connected to the first charging interface, where the second message is used to instruct the charging device connected to the first charging interface to output in a constant current mode.

[0063] It can be understood that the embodiment of the present application realizes the series boosting of charging devices connected to different charging interfaces by controlling the output modes (constant voltage mode and constant current mode) of the charging device connected to the first charging interface and the charging device connected to the second charging interface, thereby replenishing the vehicle battery. There is no need to add a boosting device on the vehicle side to overcome the defect of the prior art that the vehicle battery cannot be replenished with charging devices on a low voltage platform. This not only saves the cost of the vehicle-side boosting device and the OEM cost, but also improves user satisfaction and the time efficiency of boosting and replenishing the vehicle battery.

[0064] In some embodiments, the control unit 104 is further specifically configured to:

[0065] After determining that the charging device connected to the second charging interface outputs in a constant voltage mode and the charging device connected to the first charging interface outputs in a constant current mode, a first current output by the charging device connected to the first charging interface and a second current output by the charging device connected to the second charging interface are adjusted so that the second current is greater than the first current.

[0066] In the embodiment of the present application, after determining that the charging device connected to the second charging interface outputs in a constant voltage mode and the charging device connected to the first charging interface outputs in a constant current mode, the control unit 104 can adjust the first current output by the charging device connected to the first charging interface and the second current output by the charging device connected to the second charging interface, so that the second current output by the charging device connected to the second charging interface is greater than the first current output by the charging device connected to the first charging interface.

[0067] It should be noted that, since the embodiment of the present application realizes charging by connecting the charging device connected to the first charging interface and the charging device connected to the second charging interface in series, and controls the charging device connected to the first charging interface to output in a constant current mode, and the charging device connected to the second charging interface to output in a constant voltage mode, the current in the constructed charging circuit is determined by the constant current output by the charging device connected to the first charging interface, and if the current output by the charging device connected to the second charging interface is less than the constant current output by the charging device connected to the first charging interface, the charging device connected to the second charging interface will report a fault. Therefore, in the charging circuit, it is necessary to ensure that the current output by the charging device connected to the second charging interface is greater than the constant current output by the charging device connected to the first charging interface to avoid failure of the charging device connected to the second charging interface.

[0068] In some embodiments, the current output by the charging device connected to the second charging interface can be adjusted to be the constant current output by the charging device connected to the first charging interface plus 10A (amperes).

[0069] In some embodiments, the control unit 104 is further specifically configured to:

[0070] After determining that the charging device connected to the second charging interface outputs in constant voltage mode, a third message is sent to the charging device connected to the second charging interface, wherein the third message is used to instruct the charging device connected to the second charging interface to control the constant voltage value output in constant voltage mode to be a first set value.

[0071] In an embodiment of the present application, after determining that the charging device connected to the second charging interface outputs in a constant voltage mode, the control unit 104 may send a third message to the charging device connected to the second charging interface, where the third message is used to instruct the charging device connected to the second charging interface to control the constant voltage value output in the constant voltage mode to be a first set value.

[0072] It should be noted that the first setting value can be adaptively set based on actual applications, and the embodiments of the present application do not specifically limit this.

[0073] In some embodiments, the first set value may be the minimum output voltage of the charging device connected to the second charging interface plus 10V (volts).

[0074] In some embodiments, the first message is further used to instruct the charging device connected to the second charging interface to control the maximum current value output in the constant voltage mode to be a second set value.

[0075] In an embodiment of the present application, the first message sent by the control unit 104 to the charging device connected to the second charging interface can not only be used to instruct the charging device connected to the second charging interface to output in a constant voltage mode, but can also be used to instruct the charging device connected to the second charging interface to control the maximum current value output in the constant voltage mode to be a second set value.

[0076] It should be noted that the second setting value can be adaptively set based on actual applications, and the embodiments of the present application do not specifically limit this.

[0077] In some embodiments, the second set value may be set to 5A.

[0078] In some embodiments, the second message is further used to instruct the charging device connected to the first charging interface to control the constant current value output in the constant current mode to be a third set value.

[0079] In an embodiment of the present application, the second message sent by the control unit 104 to the charging device connected to the first charging interface can not only be used to instruct the charging device connected to the first charging interface to output in constant current mode, but also be used to instruct the charging device connected to the first charging interface to control the constant current value output in constant current mode to be a third set value.

[0080] It should be noted that the third setting value can be adaptively set based on actual applications, and the embodiments of the present application do not specifically limit this.

[0081] In some embodiments, the third set value may be set to 3A.

[0082] In some embodiments, the second message is further used to instruct the charging device connected to the first charging interface to control the maximum voltage value output in the constant current mode to be a fourth set value.

[0083] In an embodiment of the present application, the second message sent by the control unit 104 to the charging device connected to the first charging interface is used not only to instruct the charging device connected to the first charging interface to output in a constant current mode and to instruct the charging device connected to the first charging interface to control the constant current value output in the constant current mode to be a third set value, but can also be used to instruct the charging device connected to the first charging interface to control the maximum voltage value output in the constant current mode to be a fourth set value.

[0084] It should be noted that the fourth setting value can be adaptively set based on actual applications, and the embodiment of the present application does not specifically limit this.

[0085] In some embodiments, the fourth set value may be set to a voltage value of a charging device connected to the first charging interface.

[0086] The following is an introduction to the vehicle charging method provided in the embodiment of the present application. The vehicle in the embodiment of the present application includes a charging circuit, the charging circuit including at least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, and a rechargeable battery connected to the charging circuit unit.

[0087] Figure 3 One of the flow charts of a vehicle charging method provided in an embodiment of the present application is as follows: Figure 3 As shown, the method includes:

[0088] S301. When it is determined that the at least two charging interfaces are connected to a charging device for charging a vehicle, control the charging circuit unit and the at least two charging interfaces to form a charging loop; the at least two charging interfaces are connected in series in the charging loop.

[0089] In some embodiments, the vehicle includes the charging circuit described above. If the vehicle recognizes that at least two charging interfaces in the charging circuit are connected to a charging device, the charging circuit unit in the charging circuit and the at least two charging interfaces are controlled to form a charging circuit, and in the formed charging circuit, the at least two charging interfaces are connected in series.

[0090] It can be understood that by connecting at least two charging interfaces in series, the vehicle battery can be charged using at least two charging devices connected in series. By connecting at least two charging devices in series, the voltage boosting function can be achieved, thereby improving the time efficiency of vehicle charging.

[0091] It should be noted that the charging device in the embodiment of the present application may be a charging gun or a charging pile, and the embodiment of the present application does not specifically limit this.

[0092] In some embodiments, the charging circuit included in the vehicle includes two charging interfaces, namely, a first charging interface and a second charging interface. If the charging circuit included in the vehicle includes the first charging interface and the second charging interface, the charging device connected to the second charging interface can be controlled to output in a constant voltage mode, and the charging device connected to the first charging interface can be controlled to output in a constant current mode, that is, by controlling the output modes (constant voltage mode and constant current mode) of the charging device connected to the first charging interface and the charging device connected to the second charging interface, the series boosting of the charging devices connected to different charging interfaces is realized, and then the vehicle battery is replenished. The defect that the vehicle battery cannot be replenished with a charging device of a low voltage platform in the prior art can be overcome without adding a boosting device on the vehicle side, which not only saves the cost of the boosting device on the vehicle side and the cost of the OEM, but also improves user satisfaction and improves the time efficiency of boosting and replenishing the vehicle battery.

[0093] S302: Charge the rechargeable battery based on the charging circuit.

[0094] In some embodiments, after obtaining a charging circuit formed by a charging circuit unit in a charging circuit of a vehicle and at least two charging interfaces, a rechargeable battery of the vehicle may be charged based on the charging circuit.

[0095] In some embodiments, based on Figure 2 The charging circuit shown in the figure charges the vehicle and may include the following process:

[0096] Step 1: After the vehicle recognizes that both the A-gun socket and the B-gun socket are connected to charging devices, the DC charging protocol is used to support insulation testing of the charging devices connected to the A-gun socket and the B-gun socket.

[0097] Step 2: After the vehicle recognizes that the insulation detection of the charging equipment connected to the A gun socket and the B gun socket is completed, SW6 and SW4 are controlled to be turned on for pre-charging. After determining that the pre-charging is completed, SW4 is controlled to be turned off and SW5 is turned on to complete the high-voltage power-on.

[0098] Step 3: After determining that the voltage-dividing resistors R1 and R2 divide the battery pack voltage of the vehicle into half of the battery pack voltage at SW3, control SW3 to be turned on.

[0099] Step 4: Control SW2 to be turned on, and request the charging device connected to the B gun socket to output in constant voltage mode, and limit its maximum output current to 5A.

[0100] Step 5. After determining that the charging device connected to the B gun socket outputs in constant voltage mode, control SW3 to disconnect, and adjust the constant voltage output by the charging device connected to the B gun socket in constant voltage mode to the minimum output voltage of the charging device connected to the B gun socket plus 10V.

[0101] Step 6, control SW1 to be turned on, and request the charging device connected to the A gun socket to output in constant current mode, and limit its maximum output voltage to the voltage of the charging device connected to the A gun socket, and limit the output constant current to 3A.

[0102] Step 7: Synchronously adjust the charging current output by the charging devices connected to the A gun socket and the B gun socket, and keep the charging current output by the charging device connected to the B gun socket constant to the charging current output by the charging device connected to the A gun socket plus 10A.

[0103] Step 8: When it is determined that the charging termination conditions are met, first control the charging device connected to the A gun socket to stop output, then control the charging device connected to the B gun socket to stop output, and then exit charging, and control SW1 and SW2 to disconnect.

[0104] It should be noted that the charging termination conditions in the embodiments of the present application include but are not limited to the charging pack in the vehicle itself requesting to terminate charging, or a charging termination request sent by a vehicle-side user, etc.

[0105] It can be understood that the vehicle charging method provided in the embodiment of the present application controls the charging circuit unit and the at least two charging interfaces in the charging circuit to form a charging circuit when it is determined that at least two charging interfaces in the charging circuit are connected to the charging device for charging the vehicle, and the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery; that is, by connecting at least two charging interfaces in series, the embodiment of the present application can realize the boosting and energy replenishment of the vehicle battery by using at least two charging devices connected in series. Compared with the technology of adding a boosting device at the vehicle end, the embodiment of the present application can improve the time efficiency of boosting and energy replenishment for the vehicle battery.

[0106] The following is an explanation of an exemplary application of the embodiments of the present application in a practical application scenario.

[0107] Figure 4 A second flow chart of a vehicle charging method provided in an embodiment of the present application, wherein the charging method is applied to Figure 2 The charging circuit shown in Figure 4 As shown, the method includes:

[0108] S401, determine whether both the A gun socket and the B gun socket are connected to charging devices; if not, execute S402; if yes, execute S403.

[0109] S402, executing the conventional single-gun charging process.

[0110] S403: After the charging start signal is identified, all relays are disconnected, and the communication between the charging devices connected to the A gun socket and the B gun socket is waited for to be established.

[0111] S404, determine whether the charging devices connected to the A gun socket and the B gun socket have completed insulation testing; if not, wait for the charging devices to complete insulation testing; if yes, execute S405.

[0112] S405, control SW6 and SW4 to be turned on to perform pre-charging, and after the pre-charging is completed, control SW4 to be turned off and SW5 to be turned on to complete high voltage power-on.

[0113] S406, determine whether the charging device connected to the B gun socket receives the battery charging instruction; if so, execute S407.

[0114] S407, control SW3 to be turned on, request the charging device connected to the B gun socket to output in constant voltage mode, and request the output current limit to be 5A.

[0115] S408, determining whether the charging device connected to the B-gun socket starts to output in a constant voltage mode; if so, executing S409.

[0116] S409, control SW3 to be disconnected, and adjust the constant voltage output by the charging device connected to the B gun socket to be the minimum output voltage of the charging device connected to the B gun socket plus 10V.

[0117] S410, determining whether the charging device connected to the A gun socket has received a battery charging instruction; if so, executing S411.

[0118] S411, control SW1 to be turned on, request the charging device connected to the A gun socket to output in constant current mode, and request the output constant current to be 3A.

[0119] S412, determine whether the charging device connected to the A gun socket starts to output in constant current mode; if so, execute S413.

[0120] S413, adjusting the current output by the charging device connected to the B gun socket to the constant current output by the charging device connected to the A gun socket plus 10A.

[0121] S414: Determine whether the charging termination condition is met; if so, execute S415.

[0122] S415, first control the charging device connected to the A gun socket to stop output, then control the charging device connected to the B gun socket to stop output, and then control SW1 and SW2 to disconnect.

[0123] It can be understood that the embodiments of the present application can utilize charging devices connected in series (such as charging piles connected in series) to boost the voltage and replenish energy for the vehicle, thereby reducing the energy replenishment restrictions for high-voltage platform vehicles and improving the vehicle charging efficiency.

[0124] In addition, an embodiment of the present application also provides a vehicle, which includes the above-mentioned charging circuit, so as to replenish energy for a power battery on the vehicle through the charging circuit.

[0125] The device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the scheme of this embodiment. Those of ordinary skill in the art may understand and implement it without creative work.

[0126] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the embodiments of the present application may adopt the form of hardware embodiments, software embodiments, or embodiments in combination with software and hardware. Moreover, the embodiments of the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage and optical storage, etc.) that contain computer-usable program code.

[0127] The present application is described with reference to the flowcharts and / or block diagrams of the methods, devices (systems), and computer program products according to the embodiments of the present application. It should be understood that each process and / or box in the flowchart and / or block diagram, as well as the combination of the processes and / or boxes in the flowchart and / or block diagram, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to generate a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowchart and / or block diagram. Figure 1 A process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0128] These computer program instructions may also be stored in a computer readable memory capable of directing a computer or other programmable data processing device to operate in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture including an instruction device, which implements the process Figure 1 A process or multiple processes and / or boxes Figure 1 A function specified in one or more boxes.

[0129] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operating steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing instructions for implementing the process in the computer or other programmable device. Figure 1 A process or multiple processes and / or boxes Figure 1 The steps for the functions specified in one or more boxes.

[0130] The above description is merely an optional embodiment of the present application and is not intended to limit the protection scope of the present application.

Claims

1. A charging circuit for a vehicle, characterized in that: include: At least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, a rechargeable battery connected to the charging circuit unit, and a control unit; The at least two charging interfaces are used to connect to a charging device for charging the vehicle; The control unit is used to control the charging circuit unit and the at least two charging interfaces to form a charging circuit when it is determined that the at least two charging interfaces are connected to the charging device; the at least two charging interfaces are connected in series in the charging circuit, and the charging circuit is used to charge the rechargeable battery; The at least two charging interfaces include a first charging interface and a second charging interface; The charging circuit unit includes a first switch, a second switch, a third switch, a first resistor and a second resistor; the first switch includes a first end and a second end, the second switch includes a third end and a fourth end, the third switch includes a fifth end and a sixth end, the first resistor includes a seventh end and an eighth end, and the second resistor includes a ninth end and a tenth end; The first end is connected to the positive end of the first charging interface, and the second end is connected to the seventh end; The third end and the fifth end are both connected to the negative end of the first charging interface, and the fourth end is connected to the positive end of the second charging interface; The eighth terminal and the ninth terminal are both connected to the sixth terminal, and the tenth terminal is connected to the negative terminal of the second charging interface; The control unit is also used for: When it is determined that both the first charging interface and the second charging interface are connected to the charging device, controlling the second switch and the third switch to be turned on, and sending a first message to the charging device connected to the second charging interface, where the first message is used to instruct the charging device connected to the second charging interface to output in a constant voltage mode; After determining that the charging device connected to the second charging interface outputs in constant voltage mode, the third switch is controlled to be disconnected, the first switch is controlled to be turned on, and a second message is sent to the charging device connected to the first charging interface, where the second message is used to instruct the charging device connected to the first charging interface to output in constant current mode.

2. The vehicle charging circuit according to claim 1, characterized in that: The control unit is also specifically used for: After determining that the charging device connected to the second charging interface outputs in a constant voltage mode and the charging device connected to the first charging interface outputs in a constant current mode, a first current output by the charging device connected to the first charging interface and a second current output by the charging device connected to the second charging interface are adjusted so that the second current is greater than the first current.

3. The vehicle charging circuit according to claim 1, characterized in that: The control unit is also specifically used for: After determining that the charging device connected to the second charging interface outputs in constant voltage mode, a third message is sent to the charging device connected to the second charging interface, wherein the third message is used to instruct the charging device connected to the second charging interface to control the constant voltage value output in constant voltage mode to be a first set value.

4. The vehicle charging circuit according to claim 1, characterized in that: The first message is also used to instruct the charging device connected to the second charging interface to control the maximum current value output in the constant voltage mode to be a second set value.

5. The vehicle charging circuit according to claim 1, characterized in that: The second message is also used to instruct the charging device connected to the first charging interface to control the constant current value output in the constant current mode to be a third set value.

6. The vehicle charging circuit according to claim 1, characterized in that: The second message is also used to instruct the charging device connected to the first charging interface to control the maximum voltage value output in the constant current mode to be a fourth set value.

7. A method for charging a vehicle, characterized in that: The vehicle includes a charging circuit, the charging circuit includes at least two charging interfaces, a charging circuit unit connected to the at least two charging interfaces, and a rechargeable battery connected to the charging circuit unit; the method includes: When it is determined that the at least two charging interfaces are connected to a charging device for charging the vehicle, controlling the charging circuit unit and the at least two charging interfaces to form a charging loop; the at least two charging interfaces are connected in series in the charging loop; Based on the charging circuit, charging the rechargeable battery; The at least two charging interfaces include a first charging interface and a second charging interface; The charging circuit unit includes a first switch, a second switch, a third switch, a first resistor and a second resistor; the first switch includes a first end and a second end, the second switch includes a third end and a fourth end, the third switch includes a fifth end and a sixth end, the first resistor includes a seventh end and an eighth end, and the second resistor includes a ninth end and a tenth end; The first end is connected to the positive end of the first charging interface, and the second end is connected to the seventh end; The third end and the fifth end are both connected to the negative end of the first charging interface, and the fourth end is connected to the positive end of the second charging interface; The eighth terminal and the ninth terminal are both connected to the sixth terminal, and the tenth terminal is connected to the negative terminal of the second charging interface; The method further comprises: When it is determined that both the first charging interface and the second charging interface are connected to the charging device, controlling the second switch and the third switch to be turned on, and sending a first message to the charging device connected to the second charging interface, where the first message is used to instruct the charging device connected to the second charging interface to output in a constant voltage mode; After determining that the charging device connected to the second charging interface outputs in constant voltage mode, the third switch is controlled to be disconnected, the first switch is controlled to be turned on, and a second message is sent to the charging device connected to the first charging interface, where the second message is used to instruct the charging device connected to the first charging interface to output in constant current mode.

8. A vehicle, characterized in that: The vehicle comprises the charging circuit according to any one of claims 1 to 6.

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