Vehicle power supply system and vehicle

Abstract

The utility model discloses a vehicle power supply system and a vehicle. The vehicle power supply system comprises a charging interface, a first power supply, a second power supply, a DCDC unit and an ACC unit. The charging interface is connected with a first power supply and is also connected with a second power supply through the DCDC unit; the ACC unit is respectively connected with the first power supply and the second power supply; the charging interface is used for being connected with a charging device, and the charging device is used for charging a first power supply and charging a second power supply through the DCDC unit; the first power supply supplies power to the power device; the second power supply is used for supplying power to the ACC unit and the vehicle low-voltage load; the ACC unit is used as a switch of the first power supply.

Description

Technical Field

[0001] The embodiments of the utility model relate to the technical field of power supply, and in particular to a vehicle power supply system and a vehicle. Background Art

[0002] With the development of vehicle technology, especially the widespread use of electric vehicles, vehicle power supply systems are facing increasingly higher requirements. Traditional vehicle power supply systems often have shortcomings in power management, charging methods, and power distribution to different loads.

[0003] In some existing vehicles, the power supply design is relatively simple, failing to fully consider the varying power requirements of different functional modules. Consequently, a single power supply architecture cannot meet the requirements for efficient operation. Furthermore, the lack of flexible and diverse charging options can result in vehicles being unable to recharge in a timely manner in certain situations. Furthermore, the lack of comprehensive undervoltage protection circuitry can easily damage the power supply and powered devices in low-voltage conditions, impacting the vehicle's service life and safety. Utility Model Content

[0004] The utility model provides a vehicle power supply system and a vehicle, so as to achieve the purpose of solving at least one defect existing in the prior art.

[0005] In a first aspect, an embodiment of the present utility model provides a vehicle power supply system, comprising: a charging interface, a first power supply, a second power supply, a DCDC unit, and an ACC unit;

[0006] The charging interface is connected to the first power source, and the charging interface is also connected to the second power source through the DCDC unit;

[0007] The ACC unit is connected to the first power supply and the second power supply respectively;

[0008] The charging interface is used to connect to a charging device, and the charging device is used to charge the first power source and charge the second power source through the DCDC unit;

[0009] The first power source is used to supply power to the power device;

[0010] The second power supply is used to supply power to the ACC unit and the vehicle's low-voltage loads;

[0011] The ACC unit is used to serve as a switch of the first power supply.

[0012] Optionally, an auxiliary charging device is further included, which is connected to the second power supply and is used to charge the second power supply.

[0013] Optionally, the auxiliary charging device adopts a solar charging device.

[0014] Optionally, the first power supply is configured with a first undervoltage protection circuit.

[0015] Optionally, the second power supply is configured with a second undervoltage protection circuit.

[0016] Optionally, the charging device is a charger that matches the first power supply, and the DCDC unit is used to convert the output voltage of the charger into a rated charging voltage of the second power supply.

[0017] Optionally, a control panel is further included, wherein the control panel is connected to the first power supply, the second power supply, and the ACC unit.

[0018] The control panel is used to display the working status of the first power supply and the second power supply, and to control the switch of the ACC unit.

[0019] Optionally, the solar charging device is arranged on the control panel.

[0020] Optionally, the second power supply is used to output 12V electricity.

[0021] In a second aspect, an embodiment of the present invention further provides a vehicle, characterized in that it includes any vehicle power supply system described in the embodiment of the present invention.

[0022] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention proposes a vehicle power supply system, which includes a charging interface, a first power supply, a second power supply, a DCDC unit and an ACC unit, wherein the discharge circuits of the first power supply and the second power supply are independent of each other, the first power supply provides an independent power supply line for the power unit, and does not supply power to other electrical components, which can ensure that the power unit has sufficient and stable power supply during operation. In situations where high power output is required, such as acceleration, climbing, etc., it can effectively avoid the impact of power consumption of other equipment on power output, thereby ensuring the power performance of the vehicle. The first power supply and the second power supply are charged separately through the charging interface. The charging device can directly charge the first power supply, and at the same time can output a suitable voltage to the second power supply for charging through the DCDC unit. This design enables power supplies of different types and different voltage requirements to be effectively charged, increasing the flexibility of charging. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a structural block diagram of a vehicle power supply system in an embodiment;

[0024] Figure 2 It is a structural block diagram of another vehicle power supply system in the embodiment. DETAILED DESCRIPTION

[0025] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0026] Example 1

[0027] Figure 1 This is a structural diagram of the vehicle power supply system in the embodiment, refer to Figure 1 , the vehicle power supply system includes: a charging interface 100, a first power supply 200, a second power supply 300, a DCDC unit 400, and an ACC unit 500;

[0028] The charging interface 100 is connected to the first power source 200 , and the charging interface 100 is also connected to the second power source 300 through the DCDC unit 400 ;

[0029] The ACC unit 500 is connected to the first power source 200 and the second power source 300 respectively;

[0030] The charging interface 100 is used to connect to the charging device 3, which is used to charge the first power source and the second power source 300 through the DCDC unit 400;

[0031] The first power supply 200 is used to supply power to the power device 1;

[0032] The second power supply 300 is used to supply power to the ACC unit 500 and the vehicle low-voltage load 2;

[0033] The ACC unit 500 is used as a switch of the first power source 200 .

[0034] Exemplarily, in this solution, the vehicle power supply system is set to be suitable for the power supply demand usage scenario of electric bicycles.

[0035] For example, in this solution, the charging device 3 may be:

[0036] The charger works by converting mains electricity (typically 220V AC) into DC power suitable for charging electric bicycle batteries. The charger can include a transformer, rectifier, filter, and control circuit. The transformer is used to adjust the voltage, reducing the high-voltage mains electricity to a suitable charging voltage range; the rectifier converts AC power to DC power; the filter is used to smooth the DC power and reduce voltage fluctuations; and the control circuit can adjust the charging current and voltage according to the battery status (such as battery level, temperature, etc.) to prevent overcharging.

[0037] Charging cabinets (at charging stations) are typically equipped with specialized fast-charging equipment. These devices utilize high-power charging technology, enabling them to fully charge e-bike batteries in a short period of time. This system utilizes increased charging voltage and current, along with an intelligent charge management system, to quickly and safely charge the battery. When a user places a depleted battery into the station's charging slot, the charging device automatically identifies the battery type and status and begins charging.

[0038] Exemplarily, in this solution, the first power source 200 may be:

[0039] Lead-acid batteries have a capacity of around 12-20Ah, which can provide a certain range for electric bicycles. Their operating voltage is generally around 12V, and multiple batteries can be connected in series to form a higher voltage battery pack to meet the working requirements of the motor;

[0040] Lithium batteries have a higher energy density, which can reach 150-200Wh / kg. Compared with lead-acid batteries, the volume and weight of lithium batteries can be smaller under the same battery life requirements.

[0041] Lithium batteries have high charge and discharge efficiencies, typically exceeding 90%, and a long charge and discharge lifespan. High-quality lithium batteries can withstand 1,000-2,000 charge and discharge cycles. They also offer fast charging capabilities. Some fast-charging lithium batteries can be fully charged in just 1-2 hours with the right charging equipment.

[0042] Exemplarily, in this solution, the second power supply 300 may be:

[0043] Lithium batteries can be easily integrated into the vehicle's electrical system to provide a stable power source for various auxiliary devices;

[0044] Nickel-metal hydride low-voltage batteries, the performance of nickel-metal hydride low-voltage batteries is between lead-acid and lithium batteries. They can be used to power some electric bicycle auxiliary equipment that do not have particularly high requirements on battery performance.

[0045] Exemplarily, in this solution, the power unit 1 may be:

[0046] In-wheel hub motors are motors that are directly integrated into the wheel hub. Depending on how the motor and wheel work together, they are divided into brushed hub motors and brushless hub motors.

[0047] Brushed hub motors use brushes and a commutator to reverse the direction of the current, allowing the motor to rotate continuously. Brushless hub motors, on the other hand, use an electronic commutator to control the direction of the current flowing through the motor windings. The lack of brushes in brushless hub motors reduces mechanical wear and improves motor reliability and lifespan.

[0048] A mid-mounted motor is located in the middle of the e-bike frame and is typically connected to the rear wheel via a chain or belt. Its operating principle is similar to that of a traditional electric motor, converting electrical energy into mechanical energy through electromagnetic induction. Mid-mounted motors generally have higher power and torque output, providing more powerful propulsion.

[0049] Exemplarily, in this solution, the vehicle low-voltage load 2 may include headlights, taillights, turn signals, horns, electronic locks, and the like.

[0050] For example, in this solution, the charging interface 100 is used to connect to an external charging device 3. The charging device 3 directly charges the first power source 200 on the one hand, and charges the second power source 300 through the DCDC unit 400 on the other hand;

[0051] The DCDC unit 400 performs voltage conversion, converting the output voltage of the charging device 3 into the rated charging voltage of the second power source 300, ensuring safe and efficient charging of the second power source 300. This design makes the charging process more flexible and targeted, meeting the charging needs of different power sources.

[0052] The first power supply 200 is mainly used to supply power to the vehicle's power unit 1, providing power support for the vehicle's driving. The second power supply 300 is used to supply power to the ACC unit 500 and the vehicle's low-voltage load 2;

[0053] In this solution, the first power source 200 and the second power source 300 are completely independent. When riding, the first power source 200 only supplies power to the power unit and does not bear the power consumption of other electrical components. This clear division of labor design can avoid power interference between different functional modules and ensure that each part has a stable power supply.

[0054] The ACC unit 500 acts as a switch for the first power source 200. When the ACC unit 500 is in a specific state, it controls the on and off of the first power source, thereby effectively managing the power supply of the power device, which plays a key role in the vehicle's starting and stopping operations.

[0055] For example, in this embodiment, when the vehicle starts, the ACC unit 500 activates the first power supply 200 based on the driver's operation or the vehicle's startup logic, causing the first power supply 200 to supply power to the power unit 1. The first power supply 200 outputs a stable voltage and current to drive the power unit, allowing the vehicle to travel normally. During driving, the first power supply 200 continuously provides power to the power unit to meet the vehicle's power requirements.

[0056] The second power supply 300 supplies power to the ACC unit 500 and the vehicle's low-voltage loads 2. After the vehicle is started, the second power supply 300 provides power to the ACC unit 500, enabling normal operation. It also supplies power to various low-voltage loads within the vehicle, such as interior lighting, the radio, and sensors, outputting a stable voltage.

[0057] For example, in this solution, when the vehicle needs to be charged, the charging device 3 is connected to the vehicle through the charging interface 100. The charging device 3 starts to charge the first power source 200. At the same time, the voltage output by the charging device 3 is converted by the DCDC unit 400 to charge the second power source 300.

[0058] For example, if the output voltage of the charging device 3 is a relatively high voltage (such as 24V), the DCDC unit 400 converts it into a rated charging voltage (such as 12V) suitable for the second power source 300 .

[0059] This embodiment proposes a vehicle power supply system, which includes a charging interface, a first power supply, a second power supply, a DCDC unit and an ACC unit, wherein the discharge circuits of the first power supply and the second power supply are independent of each other, and the first power supply provides an independent power supply line for the power unit and does not supply power to other electrical components, thereby ensuring that the power unit has sufficient and stable power supply during operation. In situations where high power output is required, such as acceleration and climbing, the impact of power consumption by other equipment on power output can be effectively avoided, thereby ensuring the power performance of the vehicle. The first power supply and the second power supply are charged separately through the charging interface. The charging device can directly charge the first power supply and at the same time output a suitable voltage to the second power supply for charging through the DCDC unit. This design enables power supplies of different types and with different voltage requirements to be effectively charged, increasing charging flexibility.

[0060] Figure 2 This is another structural block diagram of a vehicle power supply system in an embodiment, refer to Figure 2 ,exist Figure 1 On the basis of the illustrated solution, in one possible implementation scheme, the vehicle power supply system further includes an auxiliary charging device 600 , which is connected to the second power source 300 , and is used to charge the second power source 300 .

[0061] Exemplarily, in this solution, the auxiliary charging device 600 may be:

[0062] Regenerative braking system is based on the reversibility principle of the motor. During braking or deceleration, the wheels drive the motor to reverse. At this time, the motor is equivalent to generating electricity. The coil inside the motor cuts the magnetic lines of force in the magnetic field and generates induced electromotive force according to the law of electromagnetic induction, thereby converting part of the vehicle's kinetic energy into electrical energy. This electrical energy is reversely charged into the battery through the controller and charging circuit.

[0063] Solar charging device, the solar charging device is mainly composed of solar panels, charging controller and connecting lines;

[0064] When sunlight shines on solar panels, photons excite the semiconductor materials in the panels to produce electron-hole pairs, thereby generating a potential difference across the panels and forming direct current. The charge controller adjusts the direct current generated by the solar panels to meet the charging requirements of the battery, and then charges the electrical energy into the battery.

[0065] In this solution, by configuring the second power supply 300 with an auxiliary charging device 600, the deep discharge of the battery can be alleviated to a certain extent, and the second power supply can be replenished in time during riding, avoiding the second power supply from being in a low-power state, and avoiding the second power supply from being damaged or malfunctioning due to being in an undervoltage state for a long time, thereby extending the service life of the second power supply.

[0066] exist Figure 2 On the basis of the scheme shown, in one possible implementation scheme, the auxiliary charging device adopts a solar charging device.

[0067] Illustratively, in this solution, when the charging interface 100 is not connected to the charging device 3 and the second power source 300 is not fully charged, the solar charging device can charge the second power source 300.

[0068] For example, in this solution, a solar charging device is used to charge the second power source. This allows the second power source to be continuously charged during long periods of outdoor riding in sunny conditions, replenishing the second power source's capacity to a certain extent and reducing reliance on external charging devices. Furthermore, the solar charging device has a long service life and is relatively simple to maintain.

[0069] Based on any of the foregoing solutions, in one possible implementation, the first power supply is configured with a first undervoltage protection circuit.

[0070] Illustratively, in this solution, the first power supply is configured with a first undervoltage protection circuit. When the voltage of the first power supply is too low, the power output can be shut down in time based on the first undervoltage protection circuit, effectively preventing the first power supply and electrical equipment from being damaged due to low voltage.

[0071] Based on any of the foregoing solutions, in one possible implementation, the second power supply is configured with a second undervoltage protection circuit.

[0072] Illustratively, in this solution, the second power supply is configured with a second undervoltage protection circuit. When the second power supply voltage is too low, the second undervoltage protection circuit can promptly shut down the power output, effectively preventing the second power supply and electrical equipment from being damaged by low voltage.

[0073] Based on any of the foregoing solutions, in one possible implementation, the charging device is a charger that matches the first power source, and the DCDC unit is used to convert the output voltage of the charger into a rated charging voltage of the second power source.

[0074] Based on any of the above solutions, the vehicle power supply system further includes a control panel connected to the first power supply, the second power supply, and the ACC unit.

[0075] The control panel is used to display the working status of the first power supply and the second power supply, and to control the switch of the ACC unit.

[0076] Exemplarily, in this solution, the system further includes a control panel connected to the first power supply, the second power supply, and the ACC unit;

[0077] The control panel displays the operating status of the primary and secondary power sources, such as battery level and voltage, allowing the driver to intuitively understand the power supply status. It also controls the ACC unit on and off, allowing the driver to activate or deactivate the ACC function as needed while driving.

[0078] For example, in this solution, the driver can conveniently operate the vehicle power supply system through the control panel. During operation, the control panel communicates with the first power supply, the second power supply, and the ACC unit through internal circuits to achieve real-time information interaction and transmission of control instructions.

[0079] Based on the aforementioned solution that the vehicle power supply system includes a control panel, in one possible implementation manner, the solar charging device is provided on the control panel.

[0080] Based on any of the foregoing solutions, in one possible implementation, the second power supply is used to output 12V electricity.

[0081] refer to Figure 2 , based on any of the foregoing solutions, in one possible implementation, the vehicle power supply system includes a charging interface 100, a first power source 200, a second power source 300, a DCDC unit 400, an ACC unit 500, an auxiliary charging device 600, and a control panel;

[0082] The charging interface 100 is connected to the first power source 200 , and the charging interface 100 is also connected to the second power source 300 through the DCDC unit 400 ;

[0083] The ACC unit 500 is connected to the first power source 200 and the second power source 300 respectively;

[0084] The charging interface 100 is used to connect to the charging device 3, which is used to charge the first power source and the second power source 300 through the DCDC unit 400;

[0085] The first power supply 200 is used to supply power to the power device 1;

[0086] The second power supply 300 is used to supply power to the ACC unit 500 and the vehicle low-voltage load 2;

[0087] The ACC unit 500 is used as a switch for the first power source 200;

[0088] The auxiliary charging device 600 is connected to the second power source 300 and is used to charge the second power source 300;

[0089] The control panel is connected to the first power source 200 , the second power source 300 , and the ACC unit 500 .

[0090] In this solution, the first power source 200 uses a power battery, the second power source 300 uses a storage battery, and the auxiliary charging device 600 uses a solar charging device;

[0091] The first power supply 200 is configured with a first undervoltage protection circuit, and the second power supply 300 is configured as a second undervoltage protection circuit;

[0092] The solar charging device is arranged on the control panel.

[0093] In this solution, when the vehicle is riding, ACC is turned on and the first power supply starts to discharge; when the vehicle is not riding, ACC is turned off and the first power supply enters a low-power sleep mode.

[0094] In this solution, when the first and second power supplies enter undervoltage protection, they shut down their outputs and wait for charging to wake them up. A charger (charging device) can charge both the first and second power supplies simultaneously. A solar charging device can continuously charge the second power supply when sufficient sunlight is available.

[0095] In this solution, the first power supply is used to power the power unit, and the second power supply is used to power the ACC unit and low-voltage loads. This clear division of labor avoids power supply interference between different functional modules, ensures that each part can obtain a stable and appropriate power supply, and improves the reliability of various vehicle functions.

[0096] The first power source and the second power source are charged through the charging port and the charging device, and an auxiliary charging device (such as a solar charging device) is provided to charge the second power source, thereby increasing the flexibility and diversity of charging;

[0097] The first and second power supplies are each equipped with an undervoltage protection circuit. When the power supply voltage is too low, it can immediately shut down the power output, effectively preventing damage to the power supply and powered devices due to low voltage. This protection mechanism extends the service life of the power supply and devices, reduces maintenance costs, and also improves the overall safety of the vehicle power supply system.

[0098] The setting of the control panel enables the driver to easily understand the working status of the first power supply and the second power supply and control the ACC unit.

[0099] In this solution, when the vehicle starts, the ACC unit turns on the first power supply to the power unit based on the driver's operation or the vehicle's startup logic. The first power supply outputs a stable voltage and current to drive the power unit, allowing the vehicle to operate normally.

[0100] If the voltage of the first power supply drops abnormally before or during driving, the first undervoltage protection circuit will monitor in real time and shut down the output of the first power supply when the voltage is lower than the set value, thereby protecting the power device and the first power supply itself;

[0101] The second power supply provides power to the ACC unit and the vehicle's low-voltage loads. After the vehicle is started, the second power supply provides power to the ACC unit, enabling it to operate normally.

[0102] Meanwhile, the second power supply provides power to various low-voltage loads in the vehicle, such as interior lighting, radios, and sensors, outputting a stable 12V voltage. If the second power supply voltage falls too low, the second undervoltage protection circuit activates, shutting down the output to prevent damage to the low-voltage loads.

[0103] Example 2

[0104] This embodiment proposes a vehicle (electric bicycle), including any one of the vehicle power supply systems described in Example 1. The implementation scheme and beneficial effects of the vehicle power supply system are the same as those described in Example 1, and the specific contents will not be described in detail.

[0105] Note that the above are merely preferred embodiments of the present invention and the technical principles employed. Those skilled in the art will appreciate that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments, and substitutions are possible for those skilled in the art without departing from the scope of protection of the present invention. Therefore, while the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments and may include many other equivalent embodiments without departing from the scope of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A vehicle power supply system, characterized in that: include: Charging port, first power supply, second power supply, DCDC unit, ACC unit; The charging interface is connected to the first power source, and the charging interface is also connected to the second power source through the DCDC unit; The ACC unit is connected to the first power supply and the second power supply respectively; The charging interface is used to connect to a charging device, and the charging device is used to charge the first power source and charge the second power source through the DCDC unit; The first power source is used to supply power to the power device; The second power supply is used to supply power to the ACC unit and the vehicle's low-voltage loads; The ACC unit is used to serve as a switch of the first power supply.

2. The vehicle power supply system according to claim 1, wherein: It also includes an auxiliary charging device, which is connected to the second power supply and is used to charge the second power supply.

3. The vehicle power supply system according to claim 2, wherein: The auxiliary charging device adopts a solar charging device.

4. The vehicle power supply system according to claim 1, wherein: The first power supply is configured with a first undervoltage protection circuit.

5. The vehicle power supply system according to claim 1, wherein: The second power supply is configured with a second undervoltage protection circuit.

6. The vehicle power supply system according to claim 1, wherein: The charging device is a charger that matches the first power source, and the DCDC unit is used to convert the output voltage of the charger into a rated charging voltage of the second power source.

7. The vehicle power supply system according to claim 3, wherein: It also includes a control panel, which is connected to the first power supply, the second power supply, and the ACC unit. The control panel is used to display the working status of the first power supply and the second power supply, and to control the switch of the ACC unit.

8. The vehicle power supply system according to claim 7, wherein: The solar charging device is arranged on the control panel.

9. The vehicle power supply system according to any one of claims 1 to 8, characterized in that: The second power supply is used to output 12V electricity.

10. A vehicle, characterized in that: A vehicle power supply system comprising the vehicle power supply system according to any one of claims 1 to 9.

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