An all-terrain vehicle and its power supply system

Abstract

The present invention relates to an all-terrain vehicle and discloses a power supply system. The power supply system includes: a power generation module, a first storage battery, a second storage battery, a conversion module and a control module. According to the power supply characteristics of the first storage battery and the second storage battery, the discharge states of the two are isolated from each other, greatly improving the stability and reliability of the power supply system. The present invention also discloses an all-terrain vehicle including the above power supply system. The power supply system can supply power according to the power consumption requirements of the all-terrain vehicle in the preparation stage and the start-up stage, ensuring that the all-terrain vehicle has sufficient power to start the ignition and stably supply power to the electrical load under special circumstances.

Description

Technical Field

[0001] The present invention belongs to all-terrain vehicles, and particularly relates to an all-terrain vehicle and its power supply system. Background Art

[0002] Currently, when an all-terrain vehicle is operating at night or in special working environments, high-power electrical devices are often required, such as high-brightness spotlights, warning lights, auxiliary lighting devices, etc. Nowadays, to improve the use comfort of all-terrain vehicles, the use of high-power electrical devices is increasing day by day, making the total power consumption of all-terrain vehicles gradually increase, and doubling the power supply pressure on the battery.

[0003] In the existing technical solutions, to meet the power supply requirements for high-power electrical devices and conventional electrical loads, and to provide electrical energy during the ignition stage of the starter, a larger-capacity battery is generally used as a solution. However, when the all-terrain vehicle is in an off-road state, the road conditions are complex, and high-brightness spotlights and auxiliary lighting devices need to be turned on under night lighting conditions. At the same time, the all-terrain vehicle can only operate at a low speed. At this time, the engine speed is low, and the power generation of the generator is not high, resulting in the overall power consumption being greater than the power generation, causing the battery to be in a discharged state. Once encountering special situations, the all-terrain vehicle cannot be ignited and started again, resulting in the all-terrain vehicle breaking down in the wild and causing inconvenience to users. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to propose an all-terrain vehicle and its power supply system, which can effectively solve the power consumption problem of all-terrain vehicles in special working environments, effectively allocate the electrical energy usage of the battery, and improve the stability of the power supply system.

[0005] Based on the above purpose, the present invention provides a power supply system, including: a power generation module for charging; a first battery connected to the starter of the vehicle and capable of providing a first current to the starter; the power supply system further includes: a second battery connected to the electrical load of the vehicle and providing a second current to the electrical load, and the second battery is also connected to the power generation module, and the power generation module charges the second battery; a conversion module including an input end and an output end, the input end is connected to the second battery, and the output end is connected to the first battery, and the voltage output by the second battery can be transformed by the conversion module and transmitted to the first battery to charge the first battery; wherein, when the power of the first battery is lower than a preset threshold, the second battery charges the first battery; a control module, the control module is connected to the first battery and can control the first battery to provide a first current to the starter; the control module is also connected to the second battery and can control the second battery to provide a second current to the electrical load and can control the second battery to charge the first battery; wherein, the first current provided by the first battery is greater than the second current provided by the second battery.

[0006] Further, the conversion module includes: a transformer including a primary coil and a secondary coil, the primary coil being connected to the input end of the conversion module, and the transformer being configured to step up or step down the output voltage of the second battery; a diode, an anode of the diode being connected to the secondary coil of the transformer, and a cathode of the diode being connected to the output end of the conversion module.

[0007] Further, when the ignition switch of the vehicle is turned on, the control module controls the second battery to supply power to the electrical load; when the starter is started, the control module controls the first battery to provide a first current to the starter.

[0008] Further, the capacity of the second battery is greater than that of the first battery, and the output voltage of the second battery is greater than the output voltage of the first battery.

[0009] Further, the output voltage of the power generation module is greater than the voltage of the second battery, and the output voltage of the conversion module is greater than the voltage of the first battery.

[0010] Further, the electrical load includes a first load and a second load, and the power of the second load is greater than that of the first load; wherein, the second load is connected to the second battery, and the second battery can supply power to the second load, the first load is connected to the output end of the conversion module, and the voltage output by the second battery can be stepped up or stepped down by the conversion module to supply power to the first load; wherein, the output voltage of the conversion module is greater than the voltage of the first battery.

[0011] Further, the control module includes an ECU control unit, and the ECU control unit is configured to control the first battery to provide a first current to the starter.

[0012] Further, the control module is further configured to determine whether the power supply system meets the ignition condition to determine whether the first battery provides a first current to the starter.

[0013] Further, the control module is connected to the gear position signal line, and the control module determines whether the vehicle meets the ignition condition according to the gear position signal transmitted by the gear position signal line of the vehicle.

[0014] Based on the object of the present invention, there is also provided an all-terrain vehicle, including: an engine for providing power to the all-terrain vehicle; a starter for providing the required energy to the engine; the all-terrain vehicle further includes the power supply system as described above, and the first battery provides energy to the starter during the ignition stage of the all-terrain vehicle, so that the starter enters the working state to provide energy to the engine, and the engine enters the working state to provide energy to the power generation module, and the power generation module enters the working state to supply power to the first battery or the second battery.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] It is divided for use and separately powered according to the power consumption characteristics of the storage battery, solving the disadvantage in the prior art that the battery power of a single storage battery cannot meet more power consumption requirements, ensuring that when the all-terrain vehicle is in a parked state or the engine is running at medium or low speed, the operation of the electrical load only consumes the corresponding battery power, ensuring that the other battery has sufficient power for the all-terrain vehicle to start ignition; greatly improving the stability and reliability of the power supply system; at the same time, the power storage capacity of the energy storage battery can be increased according to the power consumption requirements. When the all-terrain vehicle is running at high speed or relatively high speed, more electrical energy can be stored for future use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 Schematic diagram of an all-terrain vehicle according to the present invention;

[0018] Figure 2 Schematic structural diagram of the power supply system according to the present invention;

[0019] Figure 3 Circuit structure diagram of the power supply system according to the present invention;

[0020] Figure 4 Schematic diagram of the power supply to the ECU control unit according to the present invention;

[0021] Figure 5 Schematic diagram of the starting operation of the all-terrain vehicle according to the present invention;

[0022] Figure 6 Circuit structure diagram of the ignition stage of the all-terrain vehicle according to the present invention;

[0023] Figure 7 Circuit structure diagram of the preparation stage of the all-terrain vehicle according to the present invention;

[0024] Among them, 100: all-terrain vehicle, 11: power supply system, 12: starter, 13: engine, 14: electrical load, 15: ignition switch, 16: gear position signal line, 141: first load, 142: second load, 111: power generation module, 111a: three-phase magneto, 111b: rectifier regulator, 112: first storage battery, 113: second storage battery, 114: conversion module, 114a: transformer, 114b: diode, 115: control module, 115a: ECU control unit, 115b: first relay, 115c: second relay, 115d: third relay, 115e: ignition switch. DETAILED DESCRIPTION OF THE INVENTION

[0025] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included in the protection scope of the present invention.

[0026] In the following embodiments, an all-terrain vehicle 100 is taken as an example.

[0027] Figure 1 An all-terrain vehicle 100 is shown, which includes: a power supply system 11, a starter 12, an engine 13, an electrical load 14, an ignition switch 15, and a gear position signal line 16. The power supply system 11 supplies power to the starter 12 and the electrical load 14 respectively. The engine 13 is used to provide power for the all-terrain vehicle 100. The starter 12 is connected to the engine 13 and is used to provide the energy required for starting the engine 13. The ignition switch 15 serves as the control switch of the all-terrain vehicle 100 and controls the all-terrain vehicle 100 to enter the preparation stage from a static state. When the ignition switch 15 is turned on, the all-terrain vehicle 100 enters the preparation stage, that is, when the all-terrain vehicle 100 is powered on. In the preparation stage, the power supply system 11 provides the electrical energy required for operation to the electrical load 14, and the all-terrain vehicle 100 can enter the ignition stage at any time. In the ignition stage of the all-terrain vehicle 100, the power supply system 11 provides the energy required for starting to the starter 12, and the starter 12 provides the energy required for starting to the engine 13. After the engine 13 is started, the starter 12 is disengaged from the engine 13, and the engine 13 provides the energy required for driving the all-terrain vehicle 100.

[0028] See Figure 2 , the power supply system 11 is used to supply direct current to the starter 12 and the electrical load 14. The power supply system 11 includes: a power generation module 111, a first battery 112, a second battery 113, a conversion module 114, and a control module 115. The power generation module 111 is used to charge the first battery 112 and the second battery 113. The first battery 112 is connected to the starter 12 and can provide a first current for the starter 12. The second battery 113 is connected to the electrical load 14 and can provide a second current for the electrical load 14. It should be noted that considering that in the ignition stage of the all-terrain vehicle 100, the first battery 113 needs to provide a large current instantaneously for the starter 12 to complete the ignition of the starter 12. Secondly, considering the second battery 113 that supplies power to the electrical load 14 on the all-terrain vehicle 100 and can supply power to a high-power electrical load 14, the voltage output by the first battery 112 needs to be greater than a certain voltage value. Therefore, the relationship between the first battery 112 and the second battery 113 is: the first current provided by the first battery 112 is greater than the second current provided by the second battery 113.

[0029] As Figure 3As shown, the conversion module 114 is used to convert a DC power supply of a certain voltage level into a DC power supply of another voltage level in the power supply system 11. The conversion module 114 includes an input end and an output end. The input end is connected to the second battery 113, and the output end is connected to the first battery 112. The voltage output by the second battery 113 can be transformed by the conversion module 114 and then transmitted to the first battery 112 to charge the first battery 112. It can be understood that when the power of the first battery 112 is lower than the preset threshold, the control module 115 can control the second battery 113 to charge the first battery 112. In the related art, in one case: after the all-terrain vehicle 100 has been stationary for a long time, the battery that powers the starter 12 of the all-terrain vehicle 100 loses power or runs out of power, resulting in the inability of the battery to provide an instantaneous large current for the starter 12 during the vehicle ignition stage, and thus the all-terrain vehicle 100 cannot be ignited and started; in another case, the starter 12 and the electrical load 14 share a battery. When the all-terrain vehicle 100 is in an off-road state, the road conditions are complex, and the lighting conditions at night are poor, so a high-power electrical load 14 - a high-brightness spotlight - needs to be turned on. And due to the road conditions, the all-terrain vehicle 100 can only run at a low speed. At this time, the engine speed of the engine 13 is also low, resulting in a low power generation of the power generation module 111, and the power consumption is greater than the power generation, causing the battery shared by the starter 12 and the electrical load 14 to be in a high-discharge state. Once the engine 13 stalls in case of special circumstances, the battery shared by the starter 12 and the electrical load 14 is not enough to provide an instantaneous large current for the starter 12 due to the high-discharge state, and thus the all-terrain vehicle 100 cannot be ignited and started again, resulting in the vehicle breaking down in the wild. In this application, the second battery 113 powers the electrical load 14 of the all-terrain vehicle 100, and the first battery 112 powers the starter. The current provided by the first battery 112 is greater than the current provided by the second battery 113, and the second battery 113 can charge the first battery 112 when the power of the first battery 112 is lower than the preset threshold, thereby ensuring that the first battery 112 has sufficient power for the all-terrain vehicle 100 to be ignited and started, greatly improving the stability and reliability of the power supply system 11.

[0030] The input end of the conversion module 114 can also be connected to the power generation module 111 and the second battery 113 respectively, and the output end is connected to the first battery 112. The conversion module 114 performs a voltage conversion operation on the voltage output by the power generation module 111 or the second battery 113. For example Figure 3As shown, as an implementation, the conversion module 114 includes a transformer 114a and a diode 114b. The transformer 114a is used to perform a voltage transformation operation on the voltage output by the power generation module 111 or the second battery 113. The transformer 114a includes a primary coil and a secondary coil. The primary coil is connected to the input end of the conversion module 114, and the secondary coil is connected to the anode of the diode 114b. The cathode of the diode 114b is connected to the output end of the conversion module 114. The voltage output by the second battery 113 or the power generation module 111 is output to the diode 114b after being transformed by the transformer 114a, and then passes through the diode 114b and is transmitted from the cathode of the diode 114b to the output end of the conversion module 114. The output end of the conversion module 114 outputs the voltage after the transformation is completed. During the preparation stage of the all-terrain vehicle 100, the second battery 113 works, and the voltage applied by the second battery 113 to the anode and cathode of the diode 114b is a forward voltage. At this time, the diode 114b is turned on, enabling the voltage output by the second battery 133 to be introduced to the electrical load 14 to supply power to the electrical load 14. During the ignition stage of the all-terrain vehicle 100, the first battery 112 works, and the voltage applied by the first battery 112 to the anode and cathode of the diode 114b is a reverse voltage. At this time, the diode 114b is turned off, which can prevent the output voltage of the first battery 112 from flowing to the transformer 114a and the second battery 113. Therefore, even when the output voltage of the first battery 112 is greater than the output voltage of the second battery 113, due to the one-way conductivity of the diode 114b, the first battery 112 will not charge the second battery 113 in reverse, and the transformer 114a will not consume the power of the first battery 112, ensuring that the first battery 112 can provide a first current for the starter to complete the ignition start of the all-terrain vehicle 100. In this implementation, by utilizing the one-way conductive property of the diode 114b, electrical isolation is performed between the first battery 112 and the second battery 113, effectively improving the stability of the power supply system 11.

[0031] The control module 115 is connected to the first battery 112 and the second battery 113. When the starter 12 starts, the control module 115 can control the first battery 112 to provide a first current for the starter 12. When the ignition switch 15 starts, the control module 115 can control the second battery 113 to provide a second current for the electrical load 14.

[0032] The control module 115 includes an ECU control unit 115a (ECU, Electronic Control Unit). The ECU control unit 115a is configured to control the second battery 113 to supply a second current to the electrical load 14 during the preparation stage of the all-terrain vehicle 100, and control the first battery 112 to supply a first current to the starter 12 during the ignition stage of the all-terrain vehicle 100. In this implementation, the ECU control unit 115a is powered by the first battery 112, and the conduction / disconnection between the ECU control unit 115a and the first battery 112 is controlled by the ignition switch 15. It can be understood that by controlling whether the ECU control unit 115a is powered on through the ignition switch 15, the working state of the ECU control unit 115a is kept consistent with the working state of the all-terrain vehicle 100, improving the service life of the ECU control unit 115a, effectively reducing the power consumption and fuel consumption. As another implementation, as Figure 4 shown, the input terminal of the ECU control unit 115a is connected to the positive electrode of the first battery 112, the ground terminal of the ECU control unit 115a is connected to the negative electrode of the first battery 112, and the power supply connection between the ECU control unit 115a and the first battery 112 is continuously conductive. Compared with the above-mentioned implementation, whether the ECU control unit 115a is powered on is no longer controlled by the ignition switch 15, so that the first battery 112 continuously supplies power to the ECU control unit 115a, enabling the ECU control unit 115a to always remain in the working state, continuously acquiring and computing data or signals inside the vehicle, and making corresponding controls. As an implementation, the ignition switch 15 responds to an external input operation. For example, the user can start or close the ignition switch 15 by rotating the vehicle key.

[0033] The electrical load 14 includes multiple electrical appliances, which can be divided into a first load 141 and a second load 142 according to their power consumption or power. As an implementation, the power of the second load 142 is greater than that of the first load 141. The second load 142 is connected to the second storage battery 113, and the second storage battery 113 can provide a second current for the second load 142. The first load 141 is connected to the output end of the conversion module 114, and the voltage output by the second storage battery 113 can be transformed by the conversion module 114 to supply power to the first load 141. It can be understood that to prevent power supply interference, that is, to avoid the first storage battery 112 supplying power to the first load 141, the voltage output by the second storage battery 113 after being transformed by the conversion module 114 can be set to be greater than the voltage of the first storage battery 112, thereby avoiding the first load 141 consuming the power of the first storage battery 112 to ensure that the first storage battery 112 has sufficient power to support the starter 12 to start. The first load 141 can be an electronic device related to the start of the all-terrain vehicle 100, including but not limited to various sensors for measuring the state during start. The second load 142 refers to electrical equipment unrelated to the start of the all-terrain vehicle 100, including but not limited to high-brightness spotlights, warning lights, auxiliary lighting equipment, etc.

[0034] The control module 115 further includes a first relay 115b, a second relay 115c, a third relay 115d, and an ignition switch 115e. The control module 115 controls the conduction and disconnection of each circuit in the power supply system 11 through the first relay 115b, the second relay 115c, and the third relay 115d. Specifically, the first relay 115b is used to control the conduction or disconnection between the second storage battery 113 and the first load 141, the second relay 115c is used to control the conduction or disconnection between the first storage battery 112 and the starter 12, the third relay 115d is used to control the conduction or disconnection between the second storage battery 113 and the second load 142, and the ignition switch 115e is used to control the all-terrain vehicle 100 to enter the ignition stage. In this implementation, the second relay 115c responds to the control of the ignition switch 115e, and the ignition switch 115e responds to an external input operation of the vehicle. The external input operation can be that the user can rotate the vehicle handle to start or close the ignition switch 115e, or it can be other external input operations. During the ignition stage, the user starts the ignition switch 115e, the second relay 115c is powered on, and controls the conduction between the first storage battery 112 and the starter 12. The ECU control unit 115a obtains the signal of the ignition switch 115e and controls the first storage battery 112 to provide a first current to the starter 12.

[0035] Such as Figure 5As shown, the control module 115 is further configured to cooperate with the gear position signal line 16 of the vehicle to determine whether the all-terrain vehicle 100 meets the ignition condition, so as to determine whether the first battery 112 supplies a first current to the starter 12. As an implementation, the gear position signal line 16 is connected to the control module 115 and can send a gear position signal to the control module 115. The control module 115 determines whether the all-terrain vehicle 100 meets the ignition condition according to the gear position signal. When the all-terrain vehicle 100 is in the neutral state, the gear position signal line 16 sends a gear position signal in the neutral state to the control module 115. The control module 115 determines that the all-terrain vehicle 100 does not meet the ignition condition in response to the gear position signal in the neutral state, and the second relay 115c cannot respond to the control of the ignition switch 115e, and the connection between the first battery 112 and the starter 12 is in an open state. It should be noted that the all-terrain vehicle 100 generally has multiple gears. For example, the all-terrain vehicle is provided with a first gear, a second gear, a third gear or a neutral state under parking. When the control module 115 receives the gear position signals of the first gear, the second gear or the third gear transmitted by the gear position signal line 16, the control module 115 determines that the all-terrain vehicle 100 meets the ignition condition, and the second relay 115c is grounded through the ECU control unit 115a. When the ignition switch 115e is started, the connection between the first battery 112 and the starter 12 is turned on, and the ECU control unit 115a enables the first battery 112 to supply a first current to the starter 12.

[0036] The power generation module 111 includes a three-phase magneto 111a and a rectifier voltage regulator 111b. When the all-terrain vehicle 100 is started, the engine 13 provides mechanical energy for the three-phase magneto 111a to make the three-phase magneto 111a enter the working state. The three-phase magneto 111a outputs electrical energy in the form of alternating current and passes through the rectifier voltage regulator 111b. The rectifier voltage regulator 111b converts the alternating current into direct current for output. The power generation module 111 is connected to the second battery 113 to charge the second battery 113. The power generation module 111 is connected to the first battery 112 through the conversion module 114. The voltage output by the power generation module 111 is transformed by the conversion module 114 and then transmitted to the first battery 112 to charge the first battery 112.

[0037] The first battery 112 is a starting-type battery and is connected to the starter 12 to form a starting circuit for supplying the electrical energy required for starting to the starter 12. In this implementation, the power supply during the starting ignition stage of the all-terrain vehicle 100 is responsible for by the first battery 112. Since the all-terrain vehicle 100 requires a very large instantaneous current during the starting ignition stage to complete the starting of the starter 12. Therefore, compared with the second battery 113, the first battery 112 has a small battery capacity, and the design of the first battery 112 can be low-voltage and large-current discharge compared with the second battery 113, which is suitable for supplying power for the starting of the starter 12.

[0038] The second storage battery 113 is an energy storage type battery, and the second storage battery 113 is connected to the electrical load 14 to supply power to the electrical load 14. As an implementation, the power supply to the first load 141 and the second load 142 in the all-terrain vehicle 100 is the responsibility of the second storage battery 113. The second load 142 is connected to the second storage battery 113, and the second storage battery 113 can directly supply power to the second load 142. The first load 141 is connected to the output end of the conversion module 114. The voltage output by the second storage battery 113 can be stepped up by the conversion module 114 to supply power to the first load 141. Since the first load 141 is connected to the first storage battery 112, to prevent the first storage battery 112 from supplying power to the first load 141, the output voltage of the second storage battery 113 after being stepped up by the conversion module 114 needs to be greater than the voltage of the first storage battery 112. The power consumption characteristic of the second load 142 is that it needs to provide a small current stably for a long time. Therefore, compared with the first storage battery 112, the second storage battery 113 has a larger battery capacity, and the design of the second storage battery 113 can be high-voltage and small-current discharge compared with the first storage battery 112.

[0039] It can be understood that to ensure the normal operation of the power supply system 11 and at the same time ensure that the first storage battery 112 and the second storage battery 113 can normally charge / discharge, it is necessary to meet the following conditions: the DC voltage U2 output by the second storage battery 113 is greater than the DC voltage U1 output by the first storage battery 112, and the DC voltage U output by the rectifier voltage regulator 111b is greater than the DC voltage U2 output by the second storage battery 113, which is greater than the DC voltage U3 output by the conversion module 114, which is greater than the DC voltage U1 output by the first storage battery 112.

[0040] See Figure 6, the user starts the ignition switch 15. When the all-terrain vehicle 100 enters the preparation stage, the control module 115 determines whether the all-terrain vehicle 100 meets the ignition conditions. When the all-terrain vehicle 100 meets the ignition conditions, the second relay 115c is grounded via the ECU control unit 115a. The user starts the ignition switch 115e, and the all-terrain vehicle 100 enters the ignition stage. The circuit of the second relay 115c is turned on, and then the second relay 115c is energized, causing the second relay 115c to control the connection between the first battery 112 and the starter 12 to be turned on. The ECU control unit 115a receives the signal from the ignition switch 115e and controls the first battery 112 to supply the first current to the starter 12, causing the starter 12 to start. After the starter 12 starts, it provides the energy for the ignition stage to the engine 13, thereby driving the engine 13 to ignite and start. After the engine 13 starts, it provides energy to the three-phase magneto 111a, causing the three-phase magneto 111a to rotate and enter the working state. The three-phase magneto 111a outputs electrical energy in the form of alternating current to the rectifier regulator 111b. The rectifier regulator 111b rectifies the electrical energy into direct current and outputs it. The DC voltage output by the rectifier regulator 111b is set as U. The rectifier regulator 111b is connected to the second battery 113 and outputs the DC voltage U to the second battery 113 to charge the second battery 113. At the same time, the DC voltage U output by the rectifier regulator 111b also passes through the conversion module 114. After the DC voltage U enters the conversion module 114, it undergoes a voltage transformation operation by the transformer 114a and then is output to the first battery 112 through the diode 114b to charge the first battery 112. Thus, the charging operations for the first battery 112 and the second battery 113 are completed.

[0041] See Figure 7, when the user starts the ignition switch 15, the all-terrain vehicle 100 enters the preparation stage, and the control module 115 controls the second battery 113 to provide a second current to the electrical load 14. Specifically, when the ignition switch 15 is started, the first relay 115b is energized and controls the connection between the second battery 113 and the first load 141 to conduct. The DC voltage U2 output by the second battery 113 enters the transformer 114a from the input end of the conversion module 114. The transformer 114a performs a voltage conversion operation on the DC voltage U2, and is transmitted to the anode of the diode 114b through the secondary coil of the transformer 114a, and is transmitted from the cathode of the diode 114b to the output end of the conversion module 114, and is output from the output end to the first load 141, thereby supplying power to the first load 141. It can be understood that the DC voltage after the DC voltage U2 is transformed is greater than or equal to the DC voltage U1 output by the first battery. When the second battery 113 supplies power to the first load 141, the first battery 112 receives the DC voltage output by the second battery 113 and output through the conversion module 114. The first battery 112 is equivalent to a load, and the first battery 112 enters the charging state, thereby realizing the power supply of the second battery 113 to the first load 141, and avoiding the power supply interference caused by the first battery 112. When the ignition switch 15 is started, the third relay 115d is energized and controls the connection between the second battery 113 and the second load 142 to conduct, so that the second battery 113 supplies power to the second load 142. In this embodiment, the first load 141 and the second load 142 only consume the electric energy of the second battery 113 to work, and can also avoid the power supply interference of the first battery 112, solve the power consumption demand of the all-terrain vehicle 100, and make the power supply of the power supply system 11 more reasonable, improving the stability and reliability of the power supply system 11.

[0042] When the all-terrain vehicle 100 is parked and stationary for a long time, when the user starts the ignition switch 15 and the ignition switch 115e in sequence to start the ignition of the all-terrain vehicle 100, the first battery 112 sometimes has a situation where the remaining power is insufficient, so that the first battery 112 cannot provide a first current to the starter 12, resulting in the starter 12 not having enough energy to enter the working state, the engine 13 cannot be ignited and started, and the power generation module 111 cannot work either. At this time, the ECU control unit 115a identifies such a situation and issues an instruction to the second battery 113, so that the second battery 113 charges the first battery 112. The DC voltage U2 output by the second battery 113 can be transformed by the conversion module 114 and then output to the first battery 112 to charge the first battery 112; at the same time, after the control module 115 issues an instruction, the ignition switch 15 needs to enter the off state, that is, the user rotates the vehicle key to turn off the ignition switch 15, and after the vehicle is stationary for a certain time, the charging operation of the second battery 113 to the first battery 112 can be completed.

[0043] Although, for purposes of illustration, preferred embodiments of the present invention have been disclosed, those of ordinary skill in the art will recognize that various modifications, additions and substitutions are possible without departing from the scope and spirit of the invention disclosed by the appended claims.

Claims

1. A power supply system is applied to a vehicle. The power supply system includes: A power generation module for charging. A first battery connected to the starter of the vehicle and capable of providing a first current to the starter. Characterized in that the power supply system further includes: A second battery connected to the electrical loads of the vehicle and providing a second current to the electrical loads. The second battery is also connected to the power generation module, and the power generation module charges the second battery. The electrical loads include a first load and a second load. The first load is an electronic device related to vehicle startup, and the second load is an electrical device unrelated to vehicle startup. A conversion module including an input end and an output end. The input end is connected to the second battery, and the output end is connected to the first battery. The voltage output by the second battery can be transformed by the conversion module and transmitted to the first battery to charge the first battery. Wherein, when the power of the first battery is lower than a preset threshold, the second battery charges the first battery. A diode is provided at the output end to prevent the output voltage of the first battery from flowing to the second battery. A control module. The control module is connected to the first battery and can control the first battery to provide the first current to the starter. The control module is also connected to the second battery and can control the second battery to provide the second current to the electrical loads and can control the second battery to charge the first battery. Wherein, the first current provided by the first battery is greater than the second current provided by the second battery. The first load is connected to the output end of the conversion module. When the ignition switch of the vehicle is turned on, the voltage output by the second battery is transformed by the conversion module and supplies power to the first load. The voltage output by the second battery after being transformed by the conversion module is greater than the voltage of the first battery to prevent the first load from consuming the power of the first battery.

2. The power supply system according to claim 1, characterized in that The conversion module includes: A transformer including a primary coil and a secondary coil. The primary coil is connected to the input end of the conversion module, and the transformer is used to transform the voltage output by the second battery. A diode. The anode of the diode is connected to the secondary coil of the transformer, and the cathode of the diode is connected to the output end of the conversion module.

3. The power supply system according to claim 1, characterized in that When the ignition switch of the vehicle is turned on, the control module controls the second battery to provide the second current to the electrical loads. When the starter is started, the control module controls the first battery to provide the first current to the starter.

4. The power supply system according to claim 1, characterized in that The capacity of the second battery is greater than the capacity of the first battery, and the voltage output by the second battery is greater than the voltage output by the first battery.

5. The power supply system according to claim 4, wherein the voltage output by the power generation module is greater than the voltage of the second storage battery, and the voltage output by the conversion module is greater than the voltage of the first storage battery.

6. The power supply system according to claim 1, wherein the power of the second load is greater than the power of the first load; wherein, the second load is connected to the second storage battery, and the second storage battery can supply power to the second load.

7. The power supply system according to claim 1, characterized in that, The control module includes an ECU control unit, and the ECU control unit is configured to control the first storage battery to provide a first current to the starter.

8. The power supply system according to claim 1, wherein The control module is further configured to determine whether the vehicle meets the ignition condition to determine whether the first storage battery provides the first current to the starter.

9. The power supply system according to claim 8, characterized in that, The control module is connected to the gear position signal line, and the control module determines whether the vehicle meets the ignition condition according to the gear position signal transmitted by the vehicle's gear position signal line.

10. An all-terrain vehicle, comprising: an engine for providing power to the all-terrain vehicle; a starter for providing the required energy to the engine; wherein the all-terrain vehicle further includes the power supply system according to any one of claims 1 to 9, the first storage battery provides energy to the starter during the ignition stage of the all-terrain vehicle, so that the starter enters the working state to provide energy to the engine, the engine enters the working state to provide energy to the power generation module, and the power generation module enters the working state to supply power to the first storage battery or the second storage battery.

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