Electric system of two-wheeled electric vehicle and two-wheeled electric vehicle

Abstract

The utility model discloses a two-wheeled electric vehicle electrical system and a two-wheeled electric vehicle. The two-wheeled electric vehicle electrical system comprises a power battery unit; the power battery unit comprises a controller, a power battery, a DCDC, a charging and discharging circuit, a charging and discharging interface and at least one power interface; the power battery is connected with the charging and discharging circuit, and the charging and discharging circuit is also connected with the charging and discharging interface; the circuit further comprises a switch tube and a first resistor. The positive electrode of the power battery is connected with the first end of the switching tube, the second end of the switching tube is connected with the power input end of the DCDC, and the power input enabling end of the controller is connected with the control end of the switching tube; the first resistor is connected in parallel with the first end and the control end of the switch tube; the power supply output enabling end of the controller is connected with the enabling end of the DCDC; the power supply output end of the DCDC is connected with the power supply interface; the charging and discharging interface is used for outputting a first power supply above 48V, and the power supply interface is used for outputting a second power supply below 33V.

Description

Technical Field

[0001] The utility model relates to electric vehicle technology, and more particularly to an electrical system of a two-wheeled electric vehicle and a two-wheeled electric vehicle. Background Art

[0002] At present, there are two types of electrical architectures for two-wheeled electric vehicles on the market: Option 1: Output the corresponding working voltage (48V / 60 / V / 72V) platform, and then the relevant wake-up source directly shorts the power supply P+ or shorts the negative electrode P- to effectively perform the corresponding sleep wake-up. This method directly brings high voltage to each component, and has high requirements for the withstand voltage and surge resistance of the device. It may also cause ground line fluctuations due to the interference of the overall large current, thereby causing the disadvantage of false triggering of related wake-up signals, resulting in abnormal vehicle riding; Option 2: Active power output (48V / 60 / V / 72V) voltage, and then the sleep wake-up signal outputs 12V. The disadvantage of this solution is that the 12V voltage is not compatible with the current 48V vehicle working voltage platform. If it needs to be updated to 33V, it will cause all the components of the vehicle to be redesigned and cannot be compatible with each other. In addition, the electrical architecture of two-wheeled electric vehicles also has problems such as high power consumption and low safety. Utility Model Content

[0003] The utility model provides an electrical system of a two-wheeled electric vehicle and a two-wheeled electric vehicle, so as to achieve the purpose of solving at least one defect existing in the prior art.

[0004] In a first aspect, an embodiment of the utility model provides an electrical system for a two-wheeled electric vehicle, comprising: a power battery unit;

[0005] The power battery unit includes a controller, a power battery, a DCDC, a charge and discharge circuit, a charge and discharge interface, and at least one power interface;

[0006] The power battery is connected to the charge and discharge circuit, and the charge and discharge circuit is also connected to the charge and discharge interface;

[0007] It also includes a switch tube and a first resistor;

[0008] The positive electrode of the power battery is connected to the first end of the switch tube, the second end of the switch tube is connected to the power input end of the DCDC, and the power input enable end of the controller is connected to the control end of the switch tube;

[0009] The first resistor is connected in parallel to the first end and the control end of the switch tube;

[0010] The power output enable terminal of the controller is connected to the enable terminal of the DCDC;

[0011] The power output end of the DCDC is connected to the power interface;

[0012] The charging and discharging interface is used to output a first power supply of 48V or more, and the power supply interface is used to output a second power supply of 33V or less;

[0013] The power input enable terminal is used to output a power input enable signal, and the power input enable signal is used to control the switch tube to turn off when the voltage of the power battery is less than a threshold value.

[0014] Optionally, a load cell is also included;

[0015] The load unit includes a vehicle controller, a charger, and an electrical load;

[0016] The power battery unit is connected to the vehicle controller and the charger through the charging and discharging interface;

[0017] The power battery unit is connected to the power load via the power interface.

[0018] Optionally, the power battery unit further includes a negative pole detection wake-up circuit and a negative pole detection wake-up interface;

[0019] The controller is connected to the negative pole detection wake-up interface through the negative pole detection wake-up circuit;

[0020] The load unit includes a vehicle wiring harness;

[0021] The power battery unit is connected to the vehicle wiring harness via the negative pole detection wake-up interface, and the negative pole detection wake-up interface is short-circuited with the negative pole of the power battery via the vehicle wiring harness.

[0022] Optionally, the power battery unit further includes a wake-up signal detection circuit and a wake-up signal interface;

[0023] The controller is connected to the wake-up signal interface through the wake-up signal detection circuit;

[0024] The power battery unit is connected to the vehicle controller and the power load via the wake-up signal interface.

[0025] Optionally, the power interface includes a first power interface and a second power interface;

[0026] The load unit includes a normal power load and an abnormal power load;

[0027] The power battery unit is connected to the normal power load via the first power interface, and the power battery unit is connected to the abnormal power load via the second power interface;

[0028] The power output enable terminal includes a first power output enable terminal and a second power output enable terminal, and the enable terminal includes a first enable terminal and a second enable terminal;

[0029] The first power output enable terminal of the controller is connected to the first enable terminal of the DCDC, and the second power output enable terminal of the controller is connected to the second enable terminal of the DCDC.

[0030] Optionally, the power battery unit further includes a communication circuit and a communication interface;

[0031] The controller is connected to the communication interface via the communication circuit;

[0032] The power battery unit is connected to the vehicle controller via the communication interface.

[0033] Optionally, the charging and discharging interface includes a positive charging terminal, a negative charging terminal, a handshake detection terminal, and a charging wake-up terminal;

[0034] The power battery unit also includes a handshake detection circuit and a charging wake-up detection circuit;

[0035] The positive electrode of the power battery is connected to the positive charging terminal through the charging circuit of the charging and discharging circuit, and the negative electrode of the power battery is connected to the negative charging terminal;

[0036] The controller is connected to the handshake detection circuit and the charging wake-up detection circuit respectively;

[0037] The handshake detection circuit is further used to be connected to the handshake detection terminal, and the charging wake-up terminal is further used to be connected to the charging wake-up terminal.

[0038] Optionally, the wake-up signal detection circuit includes a first wake-up signal detection circuit and a second wake-up signal detection circuit;

[0039] The wake-up signal interface includes a first wake-up signal interface and a second wake-up signal interface;

[0040] The controller is connected to the first wake-up signal interface through the first wake-up signal detection circuit;

[0041] The controller is connected to the second wake-up signal interface through the second wake-up signal detection circuit;

[0042] The power battery unit is connected to the vehicle controller and the power load through the first wake-up signal interface;

[0043] The power battery unit is connected to the power load via the second wake-up signal interface.

[0044] Optionally, the electrical load includes a meter and an alarm.

[0045] In a second aspect, an embodiment of the utility model further provides a two-wheeled electric vehicle, comprising any two-wheeled electric vehicle electrical system described in the embodiment of the utility model.

[0046] Compared with the prior art, the beneficial effect of the utility model is that: the utility model proposes an electrical system for a two-wheeled electric vehicle, which includes a controller, a power battery, a DCDC, a charge and discharge circuit, a charge and discharge interface, and at least one power interface. The power battery is connected to the charge and discharge circuit, and the charge and discharge circuit is also connected to the charge and discharge interface. The positive electrode of the power battery is connected to the first end of the switch tube, and the second end of the switch tube is connected to the power input end of the DCDC. The charge and discharge interface is used to output a first power supply above 48V, and the power interface is used to output a second power supply below 33V. Through this scheme, a high and low voltage isolation method can be achieved. In this scheme, a switch tube is added to the DCDC power input end, and the power supply of the DCDC is controlled based on the switch tube. When the battery is in a low voltage state, the power supply of the DCDC chip is cut off, the power consumption of the battery is reduced, and the battery storage time is extended. In this scheme, a platform with a low voltage 33V output of DCDC is configured, which can be directly compatible with the working voltage platform of various components of the current vehicle, so that the vehicle does not need to update related hardware to achieve adaptation. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a structural block diagram of an electrical system of a two-wheeled electric vehicle in an embodiment;

[0048] Figure 2 is a structural block diagram of another electrical system of a two-wheeled electric vehicle in an embodiment;

[0049] Figure 3 is a structural block diagram of another electrical system of a two-wheeled electric vehicle in an embodiment;

[0050] Figure 4 is a schematic diagram of the structure of the electrical system of the two-wheeled electric vehicle in the embodiment;

[0051] Figure 5 Schematic diagram of DCDC design in the embodiment. DETAILED DESCRIPTION

[0052] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only the parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0053] Embodiment 1

[0054] Figure 1 is a block diagram of the electrical system of the two-wheeled electric vehicle in the embodiment, refer to Figure 1 , the electrical system includes a power battery unit;

[0055] The power battery unit includes a controller 100, a power battery 200, a DCDC 300, a charge and discharge circuit 400, a charge and discharge interface 302, and at least one power interface 301;

[0056] The power battery 200 is connected to the charge and discharge circuit 400 , and the charge and discharge circuit 400 is also connected to the charge and discharge interface 302 ;

[0057] It also includes a switch tube Q1 and a first resistor R5;

[0058] The positive electrode of the power battery 200 is connected to the first end of the switch tube Q1, the second end of the switch tube Q1 is connected to the power input end of the DCDC 300, and the power input enable end of the controller 100 is connected to the control end of the switch tube Q1;

[0059] The first resistor R5 is connected in parallel to the first end and the control end of the switch tube Q1;

[0060] The power output enable terminal of the controller 100 is connected to the enable terminal of the DCDC 300;

[0061] The power output terminal of DCDC 300 is connected to the power interface;

[0062] The charge and discharge interface 302 is used to output a first power supply of 48V or more, and the power supply interface 301 is used to output a second power supply of 33V or less;

[0063] The power input enable terminal is used to output a power input enable signal, and the power input enable signal is used to control the switch tube Q1 to turn off when the voltage of the power battery 200 is less than a threshold value.

[0064] In this solution, the functions of the configuration controller 100 include realizing the enabling control of the DCDC 300 and the driving control of the DCDC 300 .

[0065] In this solution, the controller 100 is also connected to the control end of the charge and discharge circuit 400 , and the controller 100 is also configured to control the on and off of the charge and discharge circuit 400 .

[0066] In this solution, the power battery 200 is connected to the charge and discharge interface 302 through the charge and discharge circuit 400, and the charge and discharge interface 302 can be used to access high-voltage (e.g., 48V, 60V, 72V) power loads and chargers;

[0067] The power battery 200 is connected to the power interface 301 through the DCDC 300. The power interface 301 can be used to access low-voltage (e.g., 12V, 24V, 33V) power loads;

[0068] Through the above-mentioned method, based on the DCDC 300 , the charge and discharge interface 302 and the power interface 301 , the isolation of the high voltage part and the low voltage part of the electric vehicle power consumption part is achieved.

[0069] In this solution, a switch tube Q1 is set at the power input terminal of the DCDC 300, and by setting the value of the power input enable signal output by the power output enable terminal of the controller 100, when the voltage of the power battery 200 is less than the threshold, the switch tube Q1 is controlled to be turned off;

[0070] The power supply control of the DCDC 300 is realized by the above method. When the power battery 200 is in a low voltage state, the power supply of the DCDC 300 can be cut off, thereby reducing the power consumption of the power battery 200 and extending the storage time of the power battery 200.

[0071] This embodiment proposes an electrical system for a two-wheeled electric vehicle, which includes a controller, a power battery, a DCDC, a charge and discharge circuit, a charge and discharge interface, and at least one power interface. The power battery is connected to the charge and discharge circuit, and the charge and discharge circuit is also connected to the charge and discharge interface. The positive electrode of the power battery is connected to the first end of the switch tube, and the second end of the switch tube is connected to the power input end of the DCDC. The charge and discharge interface is used to output a first power supply above 48V, and the power interface is used to output a second power supply below 33V. Through this scheme, a high and low voltage isolation method can be achieved. In this scheme, a switch tube is added to the DCDC power input end, and the power supply of the DCDC is controlled based on the switch tube. When the battery is in a low voltage state, the power supply of the DCDC chip is cut off, the power consumption of the battery is reduced, and the battery storage time is extended. In this scheme, a platform with a low voltage 33V output of DCDC is configured, which can be directly compatible with the working voltage platform of various components of the current vehicle, so that the vehicle does not need to update related hardware to achieve adaptation.

[0072] Figure 2 is another structural block diagram of the electrical system of a two-wheeled electric vehicle in the embodiment, refer to Figure 2 ,exist Figure 1 Based on the illustrated solution, in one possible implementation scheme, the system further includes a load unit;

[0073] The load unit includes a vehicle controller 500, a charger 600, and an electrical load 700;

[0074] The power battery unit is connected to the vehicle controller 500 and the charger 600 via the charge and discharge interface 302;

[0075] The power battery unit is connected to the power load 700 via the power interface 301 .

[0076] In this solution, the vehicle controller 500 serves as a high-voltage power load, and the power load 700 serves as a low-voltage power load.

[0077] In this solution, the vehicle controller 500 is configured to realize the control of the vehicle's driving functions (such as start-stop control, speed control, etc.) and the vehicle's preset functions (such as lighting control, alarm control, etc.).

[0078] In this solution, a charger 600 is configured to be connected to a charging device, and the charging device charges the power battery 200 through the charger 600 .

[0079] Figure 3 This is another structural block diagram of the electrical system of a two-wheeled electric vehicle in the embodiment, refer to Figure 3 ,exist Figure 1 , 2 On the basis of the scheme shown, in one possible implementation scheme, the power battery unit further includes a negative electrode detection wake-up circuit 11 and a negative electrode detection wake-up interface 12;

[0080] The controller 100 is connected to the negative pole detection wake-up interface 12 via the negative pole detection wake-up circuit 11;

[0081] The load unit includes a vehicle wiring harness 800;

[0082] The power battery unit is connected to the vehicle wiring harness 800 via the negative pole detection wake-up interface 12 , and the negative pole detection wake-up interface 12 is short-circuited with the negative pole of the power battery 200 via the vehicle wiring harness 800 .

[0083] In this solution, a negative pole detection wake-up circuit 11 and a negative pole detection wake-up interface 12 are configured to obtain a negative pole detection signal, and the negative pole detection signal is set to determine whether the power battery unit is connected to the load unit, that is, whether it is connected to the entire vehicle.

[0084] In this solution, when the power battery unit is connected to the load unit, the signal line in the negative electrode detection wake-up circuit 11 is short-connected to the negative electrode of the power battery 200 through the vehicle wiring harness 800, thereby generating a negative electrode detection signal.

[0085] In this solution, the circuit structure of the negative pole detection wake-up circuit 11 is not limited. For example, the negative pole detection wake-up circuit 11 can adopt a voltage detection circuit, and the voltage detection circuit includes the above-mentioned signal signal. By judging the voltage of the sampling point of the voltage detection circuit, it is judged whether the signal line is short-circuited with the negative pole.

[0086] Exemplarily, in this solution, when a negative pole detection signal is detected, it indicates that the power battery unit is connected to the vehicle. At this time, the controller 100 outputs a preset power input enable signal, so that the DCDC 300 can start working and supply power to the (low voltage) electrical load 700.

[0087] In this solution, by short-circuiting the signal line with the negative electrode to determine whether the power battery unit is connected to the vehicle, it is possible to avoid directly bringing high voltage to the various components of the vehicle, and avoid ground line fluctuations due to interference from the overall large current, resulting in abnormal vehicle riding and other problems.

[0088] refer to Figure 3 , based on any of the above solutions, in one possible implementation scheme, the power battery unit further includes a wake-up signal detection circuit 21 and a wake-up signal interface 22;

[0089] The controller 100 is connected to the wake-up signal interface 22 via the wake-up signal detection circuit 21;

[0090] The power battery unit is connected to the vehicle controller 500 and the power load 700 via the wake-up signal interface 22 .

[0091] In this solution, the wake-up signal detection circuit 21 and the wake-up signal interface 22 are configured to obtain the ACC wake-up signal, wherein the controller 100 is configured to perform a specified control operation when receiving the ACC wake-up signal;

[0092] For example, when receiving the ACC wake-up signal, the controller 100 can be configured to control the charge and discharge circuit 400 to be disconnected, control the DCDC 300 to operate, supply power to the designated electrical load, and thus complete the preset electrical load function detection.

[0093] In this solution, the structure of the wake-up signal detection circuit 21 is not limited, and it is the same as the prior art, and the specific content is not described in detail.

[0094] Furthermore, in a possible implementation scheme, according to the design scheme of the whole vehicle, the whole vehicle may include multiple ACC wake-up signals, for example, it may include an ACC1 wake-up signal and an ACC2 wake-up signal.

[0095] In this solution, the wake-up signal detection circuit includes a first wake-up signal detection circuit and a second wake-up signal detection circuit;

[0096] The wake-up signal interface includes a first wake-up signal interface and a second wake-up signal interface;

[0097] The controller is connected to the first wake-up signal interface through a first wake-up signal detection circuit;

[0098] The controller is connected to the second wake-up signal interface through a second wake-up signal detection circuit;

[0099] The power battery unit is connected to the vehicle controller and the power load through the first wake-up signal interface;

[0100] The power battery unit is connected to the power load via the second wake-up signal interface.

[0101] In this solution, the first wake-up signal detection circuit and the first wake-up signal interface are set to obtain the ACC1 wake-up signal, wherein the ACC1 wake-up signal is set to detect the specified power load when the vehicle is started.

[0102] Exemplarily, in this solution, the ACC1 wake-up signal working logic is set to high validity, and the vehicle controller 500 is configured to periodically generate the ACC1 wake-up signal, thereby completing the periodic status detection of the smart car;

[0103] After the controller 10 detects that the ACC1 wake-up signal is high and effective, it only wakes up the DCDC 300 and does not control the charge and discharge circuit 400. This can prevent the vehicle from starting, resulting in the headlights or horns continuing to work during polling, thereby affecting the user, and truly achieving non-sensing vehicle detection.

[0104] In this solution, the second wake-up signal detection circuit and the second wake-up signal interface are set to obtain the ACC2 wake-up signal, wherein the ACC2 wake-up signal is set to be used when the vehicle is started.

[0105] Exemplarily, in this solution, the working logic of the ACC2 wake-up signal is set to be high valid. After the controller 10 detects that the ACC2 wake-up signal is high valid, it controls the charge and discharge circuit 400 to operate and start the vehicle.

[0106] refer to Figure 3 , based on any of the above solutions, in one possible implementation, the power interface includes a first power interface 3011 and a second power interface 3012;

[0107] The load unit includes a normal power load 701 and an abnormal power load 702;

[0108] The power battery unit is connected to the normal power load 701 through the first power interface 3011, and the power battery unit is connected to the abnormal power load 702 through the second power interface 3012;

[0109] The power output enable terminal includes a first power output enable terminal and a second power output enable terminal, and the enable terminal includes a first enable terminal and a second enable terminal;

[0110] The first power output enable terminal of the controller 100 is connected to the first enable terminal of the DCDC, and the second power output enable terminal of the controller 100 is connected to the second enable terminal of the DCDC.

[0111] In this solution, the DCDC 300 is configured to output two voltages, wherein the output of each voltage can be controlled separately by the controller 100;

[0112] When the enable signal output by the first power output enable terminal is valid, the first power interface 3011 outputs voltage, and when the enable signal output by the second power output enable terminal is valid, the second power interface 3012 outputs voltage.

[0113] Exemplarily, in this solution, the controller 100 may be configured to output a first enabling signal when detecting that the power battery unit is connected to the vehicle, and control the DCDC 300 to supply power to the permanent power load 701 through the first power interface 3011;

[0114] After the configuration controller 100 detects the vehicle start-up wake-up signal, it outputs a second enable signal to control the DCDC 300 to supply power to the non-critical power load 702 through the second power interface 3012 .

[0115] In this solution, the DCDC 300 is set to output two voltages, one for powering the normal power load 701 and the other for powering the abnormal power load 702, which can reduce the power consumption of the whole vehicle.

[0116] refer to Figure 3 , based on any of the above solutions, in one possible implementation scheme, the power battery unit further includes a communication circuit 31 and a communication interface 32;

[0117] The controller 100 is connected to the communication interface 32 via the communication circuit 31;

[0118] The power battery unit is connected to the vehicle controller 500 via the communication interface 32 .

[0119] Exemplarily, in this solution, the communication interface 32 can adopt a K-line interface, and the controller 100 communicates with the vehicle controller 500 through the communication circuit 31 and the communication interface 32. The communication signal can be in different level states such as 5V, 12V or 3.3V, and the baud rate can be 50Bit / s to 500KBit / s.

[0120] Based on any of the foregoing solutions, in one possible implementation scheme, the charge and discharge interface includes a positive charging terminal, a negative charging terminal, a handshake detection terminal, and a charge wake-up terminal;

[0121] The power battery unit also includes a handshake detection circuit and a charging wake-up detection circuit;

[0122] The positive electrode of the power battery is connected to the positive charging terminal through the charging circuit of the charging and discharging circuit, and the negative electrode of the power battery is connected to the negative charging terminal;

[0123] The controller is respectively connected with the handshake detection circuit and the charging wake-up detection circuit;

[0124] The handshake detection circuit is also used to be connected to the handshake detection terminal, and the charging wake-up detection circuit is also used to be connected to the charging wake-up terminal.

[0125] In this solution, the positive charging terminal and the negative charging terminal are used to charge the power battery 200;

[0126] The handshake detection circuit and the handshake detection terminal are used for communication between the controller 100 and the charger 600. Specifically, the communication includes preset information exchange and handshake actions to avoid abnormal behaviors such as mischarging or overcharging. The handshake detection terminal can be different communication ports such as 485 / 232 / CAN / LIN;

[0127] The charging wake-up detection circuit and the charging wake-up terminal are used for the controller 100 to obtain the charging signal of the charger 600;

[0128] Specifically, the charging signal can be a CRG charging signal, which is set to be low valid. When the charger 600 is inserted, the controller 100 recognizes the CRG charging signal and determines whether to enter the charging state. At the same time, based on the design, whether charging handshake and other actions are required, when charging, the controller 100 controls the charging and discharging circuit 400 to operate, thereby charging the power battery 200.

[0129] Figure 4 is a schematic diagram of the electrical system structure of the two-wheeled electric vehicle in the embodiment, Figure 5 This is a schematic diagram of the DCDC design in the embodiment, refer to Figure 4 and Figure 5 Based on any of the above solutions, in one possible implementation scheme, the system includes:

[0130] The electrical system includes a power battery unit;

[0131] The power battery unit includes a controller 100, a power battery 200, a DCDC 300, a first MOS tube M1, a second MOS tube M2, a third MOS tube M3, a fourth MOS tube M4, a charging interface, a discharging interface, a first power interface 3011, and a second power interface 3012;

[0132] The first MOS tube M1 and the second MOS tube M2 are connected in series to form a discharge circuit, and the third MOS tube M3 and the fourth MOS tube M4 are connected in series to form a charging circuit;

[0133] The positive electrode of the power battery 200 is connected to the P+ terminal of the discharge interface through the discharge circuit, and the positive electrode of the power battery 200 is connected to the C+ terminal of the charging interface through the charging circuit;

[0134] It also includes a switch tube Q1, a first resistor R5, a second resistor R1, a third resistor R3, a fourth resistor R2, and a fifth resistor R4;

[0135] The positive electrode of the power battery 200 is connected to the first end of the switch tube Q1, the second end of the switch tube Q1 is connected to the power input end of the DCDC 300, and the power input enable end of the controller 100 is connected to the control end of the switch tube Q1;

[0136] The first resistor R5 is connected in parallel to the first end and the control end of the switch tube Q1;

[0137] The power output enable terminal of the controller 100 is connected to the enable terminal of the DCDC 300;

[0138] The controller 100 includes a first power output enable terminal and a second power output enable terminal, and the DCDC 300 includes a first enable terminal and a second enable terminal;

[0139] The first power output enable terminal of the controller 100 is connected to the first enable terminal of the DCDC, and the second power output enable terminal of the controller 100 is connected to the second enable terminal of the DCDC;

[0140] The first voltage output terminal of the DCDC 300 is connected to the first power interface 3011 , and the second voltage output terminal of the DCDC 300 is connected to the second power interface 3012 ;

[0141] The first voltage output terminal of the DCDC 300 is further configured with a first capacitor C1, and the second voltage output terminal of the DCDC 300 is further configured with a second capacitor C2;

[0142] The second resistor R1 and the third resistor R3 are connected in series to form a first voltage divider circuit, and the voltage dividing point of the first voltage divider circuit is connected to the first feedback terminal of the DCDC300;

[0143] The fourth resistor R2 and the fifth resistor R4 are connected in series to form a second voltage divider circuit, and the voltage dividing point of the second voltage divider circuit is connected to the second feedback terminal of the DCDC300;

[0144] The system also includes a load cell;

[0145] The load unit includes a vehicle controller 500, a charger 600, a normal power load 701, and an abnormal power load 702;

[0146] The power battery unit is connected to the normal power load 701 through the first power interface 3011, and the power battery unit is connected to the abnormal power load 702 through the second power interface 3012;

[0147] The power battery unit also includes a negative electrode detection wake-up circuit 11 and a negative electrode detection wake-up interface 12;

[0148] The controller 100 is connected to the negative pole detection wake-up interface 12 via the negative pole detection wake-up circuit 11;

[0149] The load unit includes a vehicle wiring harness 800;

[0150] The power battery unit is connected to the vehicle wiring harness 800 through the negative pole detection wake-up interface 12, and the negative pole detection wake-up interface 12 is short-circuited with the negative pole of the power battery 200 through the vehicle wiring harness 800;

[0151] The power battery unit further includes a first wake-up signal detection circuit 211 and a second wake-up signal detection circuit 212;

[0152] The wake-up signal interface includes a first wake-up signal interface and a second wake-up signal interface;

[0153] The controller 100 is connected to the first wake-up signal interface through the first wake-up signal detection circuit 211;

[0154] The controller 100 is connected to the second wake-up signal interface via the second wake-up signal detection circuit 212;

[0155] The power battery unit is connected to the vehicle controller 500, the normal power load 701, and the abnormal power load 702 through the first wake-up signal interface;

[0156] The power battery unit is connected to the normal power load 701 and the abnormal power load 702 via the second wake-up signal interface;

[0157] The charging and discharging interface includes a positive charging terminal C+, a negative charging terminal C-, a handshake detection terminal K1, and a charging wake-up terminal CRG;

[0158] The power battery unit also includes a handshake detection circuit 214 and a charging wake-up detection circuit 213;

[0159] The positive electrode of the power battery is connected to the positive charging terminal C+ through the charging circuit, and the negative electrode of the power battery is connected to the negative charging terminal C-;

[0160] The controller 100 is connected to the handshake detection circuit 214 and the charging wake-up detection circuit 213 respectively;

[0161] The handshake detection circuit 214 is further used to be connected to the handshake detection terminal K1, and the charging wake-up detection circuit 213 is further used to be connected to the charging wake-up terminal CRG;

[0162] The power battery unit also includes a communication circuit 31 and a communication interface 32;

[0163] The controller 100 is connected to the communication interface 32 via the communication circuit 31;

[0164] The power battery unit is connected to the vehicle controller 500 via the communication interface 32 .

[0165] In this solution, it is assumed that the normal power load 701 includes an alarm (ALM) and an Internet of Things module (IOT), and the abnormal power load 701 includes a meter.

[0166] In this solution, DCDC 300 is set to output a 33V voltage.

[0167] In this solution, a negative pole detection wake-up circuit 11 and a negative pole detection wake-up interface 12 are configured to obtain a negative pole detection signal, and the negative pole detection signal is set to be an ON signal.

[0168] In this solution, the output voltage of the first power interface 3011 is set to 33V normal power, and the output voltage of the second power interface 3012 is set to 33V PWR.

[0169] In this solution, the first wake-up signal detection circuit and the first wake-up signal interface are set to obtain the ACC1 wake-up signal, and the second wake-up signal detection circuit and the second wake-up signal interface are set to obtain the ACC2 wake-up signal.

[0170] In this solution, the signal working logic is as follows:

[0171] The working logic of the 33V normal power signal is that as long as the ON signal is connected, it means that the battery is connected to the vehicle, and the 33V normal power output is used to supply power to the vehicle's IoT module IOT and alarm ALM and other normal power supply modules to ensure the corresponding user APP / Bluetooth / cloud platform control;

[0172] The 33V PWR power supply logic is that after the vehicle is connected to the ON signal, the ACC2 is connected synchronously, which means that the vehicle is in the key-on state, that is, the charge and discharge MOS corresponding to the discharge circuit is closed, and then the controller performs the corresponding power supply, and the vehicle can be ridden;

[0173] The negative pole detection ON signal is a signal for the controller 100 to detect whether the battery is connected to the vehicle. If the ON signal is shorted to the negative pole, it is considered that the vehicle is connected;

[0174] The communication interface is a K-line interface, which is a signal for the controller 100 to communicate with the vehicle. This signal can be in different level states such as 5V, 12V or 3.3V. The specific baud rate can be within the requirements of this solution, ranging from 50Bit / s to 500KBit / s, according to the requirements of different vehicle models.

[0175] The working logic of the ACC1 wake-up signal is high effective. The main design is based on the intelligent car periodically detecting the vehicle status of the controller 100. After the controller 100 detects the high effective, it only performs the corresponding wake-up without performing the MOS action and the 33V Pwr action. This can avoid the situation where the vehicle headlights or horns are continuously pressed, resulting in the lights and other components continuing to work during polling, thereby affecting the user, and truly achieving non-sensing vehicle detection. If the vehicle has no polling and intelligent data upload functions, ACC2 and ACC1 can be merged together;

[0176] The ACC2 signal is high and effective. After the controller 100 detects this level, the corresponding MOS is engaged, that is, the charge and discharge MOS corresponding to the discharge circuit is engaged, and then the power battery 200 provides corresponding power supply, and the whole vehicle is ridden;

[0177] The CRG charging signal is low effective. When the charger 600 is inserted into the (charging device), the controller 100 identifies the CRG charging signal and judges to enter the charging state. It also determines whether the charging handshake and other actions are needed based on the design, and attracts the corresponding C+ loop MOS.

[0178] The K-line communication interface K1 of the charger 600 is used for communication between the controller 100 and the charger, and performs corresponding information exchange and handshake actions to avoid abnormal behaviors such as mischarging or overcharging. The K-line only represents one method. Different communication methods such as 485 / 232 / CAN / LIN can be summarized in this solution.

[0179] If the vehicle distinguishes between 33VPwr and 33V normal power, the controller 100 can only output one 33V, which also falls within the scope of this solution;

[0180] The power battery 200 supplies power to the DCDC 300, and combined with the internal voltage reduction process of the DCDC 300, it then outputs 33V PWR through SW1 (first voltage output terminal) and 33V normal power through SW2 (second voltage output terminal);

[0181] During this output process, the output voltage state is detected in real time through FB1 (first feedback terminal) and FB2 (second feedback terminal) of DCDC 300 to confirm whether the output is the corresponding voltage;

[0182] This solution can output the corresponding 33V voltage or other voltage by adjusting the proportional relationship between R1, R3 and R2, R4 resistors;

[0183] During this output process, the 33V PWR enable and 33V normal power enable can be regulated by the single chip microcomputer to control the corresponding 33V PWR and 33V normal power output states;

[0184] In synchronization with this solution, a transistor Q1 is added to the DCDC output port VIN to control the power supply of the DCDC chip, thereby cutting off the power supply of the DCDC chip when the battery voltage is low, reducing the power consumption of the battery and extending the battery storage time.

[0185] The power output power supply is directly controlled by the corresponding MOS tubes of M1, M2, M3, and M4, and then directly outputs the corresponding charging and discharging circuits.

[0186] This solution can realize high and low voltage isolation. This solution includes dual output or single output of DCDC chip. Through dual chips and other methods, the corresponding 33V voltage and enable control scheme can be achieved, thereby achieving corresponding protection and reducing power consumption.

[0187] In this solution, the power battery voltage, component operating voltage (33V) and related wake-up signal voltage are distinguished to improve power stability and anti-interference, thereby improving vehicle safety, avoiding power anomalies and sleep and wake-up anomalies of related components, and effectively protecting against anomalies such as damage caused by high voltage introduced into 485 / CAN communication;

[0188] By outputting a low-voltage 33V platform, it can be directly compatible with the working voltage platform of various components of the current vehicle, so that the vehicle does not need to update related hardware and remains adaptable;

[0189] By outputting a low voltage of 33V, compared with the output low voltage 12V platform, the operating current of external devices can be reduced to 1 / 3, thereby improving the safety of wiring harness overcurrent and effectively ensuring the safety of the entire vehicle.

[0190] Embodiment 2

[0191] This embodiment proposes a two-wheeled electric vehicle, including any two-wheeled electric vehicle electrical system recorded in Embodiment 1. The implementation method and beneficial effects of the system are the same as the corresponding contents recorded in Embodiment 1, and the specific contents will not be described in detail.

[0192] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention is described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. An electrical system for a two-wheeled electric vehicle, characterized in that: include: Power battery unit; The power battery unit includes a controller, a power battery, a DCDC, a charge and discharge circuit, a charge and discharge interface, and at least one power interface; The power battery is connected to the charge and discharge circuit, and the charge and discharge circuit is also connected to the charge and discharge interface; It also includes a switch tube and a first resistor; The positive electrode of the power battery is connected to the first end of the switch tube, the second end of the switch tube is connected to the power input end of the DCDC, and the power input enable end of the controller is connected to the control end of the switch tube; The first resistor is connected in parallel to the first end and the control end of the switch tube; The power output enable terminal of the controller is connected to the enable terminal of the DCDC; The power output end of the DCDC is connected to the power interface; The charging and discharging interface is used to output a first power supply of 48V or more, and the power supply interface is used to output a second power supply of 33V or less; The power input enable terminal is used to output a power input enable signal, and the power input enable signal is used to control the switch tube to turn off when the voltage of the power battery is less than a threshold value.

2. The two-wheeled electric vehicle electrical system according to claim 1, characterized in that: Also included is a load cell; The load unit includes a vehicle controller, a charger, and an electrical load; The power battery unit is connected to the vehicle controller and the charger through the charging and discharging interface; The power battery unit is connected to the power load via the power interface.

3. The two-wheeled electric vehicle electrical system as claimed in claim 2, characterized in that: The power battery unit also includes a negative electrode detection wake-up circuit and a negative electrode detection wake-up interface; The controller is connected to the negative pole detection wake-up interface through the negative pole detection wake-up circuit; The load unit includes a vehicle wiring harness; The power battery unit is connected to the vehicle wiring harness via the negative pole detection wake-up interface, and the negative pole detection wake-up interface is short-circuited with the negative pole of the power battery via the vehicle wiring harness.

4. The two-wheeled electric vehicle electrical system as claimed in claim 2, characterized in that: The power battery unit also includes a wake-up signal detection circuit and a wake-up signal interface; The controller is connected to the wake-up signal interface through the wake-up signal detection circuit; The power battery unit is connected to the vehicle controller and the power load via the wake-up signal interface.

5. The two-wheeled electric vehicle electrical system as claimed in claim 2, characterized in that: The power interface includes a first power interface and a second power interface; The load unit includes a normal power load and an abnormal power load; The power battery unit is connected to the normal power load via the first power interface, and the power battery unit is connected to the abnormal power load via the second power interface; The power output enable terminal includes a first power output enable terminal and a second power output enable terminal, and the enable terminal includes a first enable terminal and a second enable terminal; The first power output enable terminal of the controller is connected to the first enable terminal of the DCDC, and the second power output enable terminal of the controller is connected to the second enable terminal of the DCDC.

6. The two-wheeled electric vehicle electrical system as claimed in claim 2, characterized in that: The power battery unit also includes a communication circuit and a communication interface; The controller is connected to the communication interface via the communication circuit; The power battery unit is connected to the vehicle controller via the communication interface.

7. The two-wheeled electric vehicle electrical system according to claim 1, characterized in that: The charging and discharging interface includes a positive charging terminal, a negative charging terminal, a handshake detection terminal, and a charging wake-up terminal; The power battery unit also includes a handshake detection circuit and a charging wake-up detection circuit; The positive electrode of the power battery is connected to the positive charging terminal through the charging circuit of the charging and discharging circuit, and the negative electrode of the power battery is connected to the negative charging terminal; The controller is connected to the handshake detection circuit and the charging wake-up detection circuit respectively; The handshake detection circuit is further used to be connected to the handshake detection terminal, and the charging wake-up terminal is further used to be connected to the charging wake-up terminal.

8. The two-wheeled electric vehicle electrical system as claimed in claim 4, characterized in that: The wake-up signal detection circuit includes a first wake-up signal detection circuit and a second wake-up signal detection circuit; The wake-up signal interface includes a first wake-up signal interface and a second wake-up signal interface; The controller is connected to the first wake-up signal interface through the first wake-up signal detection circuit; The controller is connected to the second wake-up signal interface through the second wake-up signal detection circuit; The power battery unit is connected to the vehicle controller and the power load through the first wake-up signal interface; The power battery unit is connected to the power load via the second wake-up signal interface.

9. The two-wheeled electric vehicle electrical system as claimed in claim 2, characterized in that: The electrical load includes a meter and an alarm.

10. A two-wheeled electric vehicle, characterized in that: The invention comprises the electrical system of a two-wheeled electric vehicle as claimed in any one of claims 1 to 9.

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