Whole vehicle power supply device, whole vehicle system and vehicle

Abstract

The utility model discloses a whole vehicle power supply device, whole vehicle system and vehicle relates to whole vehicle power supply technical field, include: low voltage electrical apparatus, high voltage electrical apparatus, first battery, second battery and power module, first battery and second battery are connected in series after, with high voltage electrical apparatus connects, second battery and power module are connected in parallel after, with low voltage electrical apparatus connects, the negative pole of second battery is grounded, the power module includes voltage equalization unit, its sampling end connects the positive pole of second battery, is used for gathering the voltage of second battery to determine the voltage difference between first battery and second battery, and according to voltage difference, the size of target voltage signal that signal output end exports is adjusted, to equalize the voltage of first battery and second battery, the utility model discloses can utilize two groups of battery and realize 12V voltage and 24V voltage's stable output, not only has reduced the occupied space of whole vehicle system, also has reduced whole vehicle weight and cost.

Description

Technical Field

[0001] This utility model relates to the field of vehicle power supply technology, and in particular to a vehicle power supply device, a vehicle system and a vehicle. Background Technology

[0002] Currently, vehicle systems typically require three battery packs to stably output 12V and 24V voltages. However, three battery packs occupy a significant amount of space and increase the overall vehicle weight and cost. Utility Model Content

[0003] The main purpose of this utility model is to provide a vehicle power supply device, vehicle system and vehicle, which aims to achieve stable output of 12V and 24V voltage by using two sets of batteries, which not only reduces the space occupied by the vehicle system, but also reduces the weight and cost of the vehicle.

[0004] To achieve the above objectives, this utility model proposes a vehicle power supply device, comprising:

[0005] Low-voltage electrical appliances and high-voltage electrical appliances;

[0006] A first battery and a second battery, wherein the negative terminal of the first battery is connected to the positive terminal of the second battery, the positive terminal of the first battery and the negative terminal of the second battery are connected to the high-voltage electrical appliance, the positive terminal and the negative terminal of the second battery are connected to the low-voltage electrical appliance, and the negative terminal of the second battery is grounded.

[0007] A power module, wherein the signal output terminal of the power module is connected in parallel with the second battery, and the power supply voltage input terminal of the power module is connected to the positive terminal of the first battery;

[0008] The power module includes a voltage equalization unit. The sampling terminal of the voltage equalization unit is connected to the positive terminal of the second battery to collect the voltage of the second battery, determine the voltage difference between the first battery and the second battery, and adjust the magnitude of the target voltage signal output by the signal output terminal according to the voltage difference to equalize the voltage of the first battery and the second battery.

[0009] In one embodiment, the voltage equalization unit includes:

[0010] A voltage sampling circuit, wherein the sampling terminal of the voltage sampling circuit is connected to the positive terminal of the second battery, and is used to collect the voltage of the second battery;

[0011] The main control unit, whose input terminal is connected to the output terminal of the voltage sampling circuit, is used to determine the voltage difference between the first battery and the second battery, and adjust the magnitude of the target voltage signal according to the voltage difference.

[0012] In one embodiment, the power module further includes:

[0013] The signal input circuit has its input terminal serving as the power supply voltage input terminal of the power module and connected to the positive terminal of the first battery to receive a 24V power supply voltage signal.

[0014] A signal processing circuit, wherein the input terminal of the signal processing circuit is connected to the output terminal of the signal input circuit, is used to process the 24V power supply voltage signal to generate the target voltage signal;

[0015] The signal output circuit has its input terminal connected to the output terminal of the signal processing circuit. The output terminal of the signal output circuit is connected in parallel with the second battery as the signal output terminal of the power module. The control terminal of the signal output circuit is connected to the output terminal of the voltage equalization unit and is used to output the target voltage signal.

[0016] In one embodiment, the signal output circuit includes an output sub-circuit and an output anti-reverse sub-circuit;

[0017] The input terminal of the output sub-circuit is connected to the output terminal of the signal processing circuit, the output terminal of the output sub-circuit is connected to the input terminal of the output anti-reverse sub-circuit, the control terminal of the output sub-circuit is connected to the output terminal of the voltage equalization unit, and the output terminal of the output anti-reverse sub-circuit is connected in parallel with the second battery as the signal output terminal of the power module.

[0018] In one embodiment, the vehicle power supply device further includes:

[0019] The intelligent power supply controller is connected to the trigger signal input terminal of the power module. It is used to detect whether the voltage of the vehicle system is less than a preset voltage threshold. When the voltage of the vehicle system is detected to be less than the preset voltage threshold, the controller outputs a trigger signal to the power module to trigger the power module to work.

[0020] In one embodiment, the vehicle power supply device further includes:

[0021] A trigger switch is connected to the trigger signal input terminal of the power module. After receiving a closing command from the user, the trigger switch enters a closed state to output a trigger signal to the power module to trigger the power module to work.

[0022] In one embodiment, the vehicle power supply device further includes:

[0023] The fault alarm module is connected to the power supply module and is used to output an alarm signal when it receives a fault signal from the power supply module.

[0024] In one embodiment, the high-voltage appliance is a 24V appliance, and the low-voltage appliance is a 12V appliance.

[0025] In addition, to achieve the above objectives, this utility model also provides a vehicle system, which includes the vehicle power supply device as described above.

[0026] In addition, to achieve the above objectives, this utility model also provides a vehicle, which includes a vehicle body and a vehicle system as described above, wherein the vehicle system is disposed on the vehicle body.

[0027] This utility model provides a vehicle power supply device, including a low-voltage electrical appliance and a high-voltage electrical appliance; a first battery and a second battery, with the negative terminal of the first battery connected to the positive terminal of the second battery, the positive terminal of the first battery and the negative terminal of the second battery connected to the high-voltage electrical appliance, and the positive and negative terminals of the second battery connected to the low-voltage electrical appliance, with the negative terminal of the second battery grounded; a power module, with its signal output terminal connected in parallel with the second battery, and its power supply voltage input terminal connected to the positive terminal of the first battery; wherein, the power module includes a voltage equalization unit, the sampling terminal of which is connected to the positive terminal of the second battery, for collecting the voltage of the second battery to determine the voltage difference between the first battery and the second battery, and adjusting the magnitude of the target voltage signal output by the signal output terminal according to the voltage difference to equalize the voltage of the first battery and the second battery.

[0028] Therefore, this invention connects a first battery and a second battery in series to a high-voltage electrical appliance, and connects the second battery and the power module in parallel to a low-voltage electrical appliance. Thus, the vehicle power supply device designed in this invention can achieve high-voltage (24V) output using the first and second batteries, and low-voltage (12V) output using the second battery. Furthermore, this invention also includes a voltage equalization unit in the power module. This unit can collect the voltage of the second battery to determine the voltage difference between the first and second batteries, and adjust the magnitude of the target voltage signal output from the signal output terminal based on the voltage difference. This adjusts the voltage supplied by the power module to the second battery, thereby replenishing the second battery's power and balancing the voltages of the first and second batteries, eliminating their voltage difference, and enabling the vehicle power supply device to stably output 12V and 24V voltages.

[0029] In summary, the vehicle power supply device designed in this invention only requires two sets of batteries to stably output 12V and 24V voltages. Compared with conventional methods, this not only reduces the space occupied by the device in the vehicle system, but also reduces the overall vehicle weight and cost. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0031] Figure 1 This is a schematic diagram of the structure of the vehicle power supply device provided in the first embodiment of the present utility model;

[0032] Figure 2 A schematic diagram of the structure of the vehicle power supply device when the voltage equalization unit provided in the first embodiment of this utility model includes a voltage sampling circuit and a main control unit;

[0033] Figure 3 This is a schematic diagram of the structure of the vehicle power supply device provided in the second embodiment of the present utility model;

[0034] Figure 4 This is a schematic diagram of the structure of the vehicle power supply device provided in the third embodiment of the present utility model;

[0035] Figure 5 This is a schematic diagram of the power module provided in the fourth embodiment of the present invention;

[0036] Figure 6 The fourth embodiment of this utility model provides a schematic diagram of the power supply module when the signal processing circuit includes a power conversion sub-circuit and a synchronous rectification sub-circuit, and the signal output circuit includes an output sub-circuit and an output anti-reverse sub-circuit.

[0037] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0038] Explanation of icon numbers:

[0039] 10. Low-voltage electrical appliances; 20. High-voltage electrical appliances; 30. Power supply module; 40. Intelligent power replenishment controller; 50. Fault alarm module; BAT1. First battery; BAT2. Second battery; K1. Trigger switch; 31. Voltage equalization unit; 311. Voltage sampling circuit; 312. Main control unit; 32. Signal input circuit; 33. Signal processing circuit; 331. Power conversion sub-circuit; 332. Synchronous rectification sub-circuit; 34. Signal output circuit; 341. Output sub-circuit; 342. Output anti-reverse sub-circuit; GND, ground. Detailed Implementation

[0040] It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0041] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0042] It should be noted that the descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope claimed by this utility model.

[0043] Currently, vehicle systems typically require three battery packs to stably output 12V and 24V voltages. However, three battery packs occupy a significant amount of space and increase the overall vehicle weight and cost.

[0044] Based on this, the present invention provides a vehicle power supply device. In the first embodiment of the present invention, please refer to... Figure 1 The vehicle power supply system may include:

[0045] 10 low-voltage electrical appliances and 20 high-voltage electrical appliances;

[0046] First battery BAT1 and second battery BAT2, the negative terminal of first battery BAT1 is connected to the positive terminal of second battery BAT2, the positive terminal of first battery BAT1 and the negative terminal of second battery BAT2 are connected to high voltage appliance 20, the positive and negative terminals of second battery BAT2 are connected to low voltage appliance 10, and the negative terminal of second battery BAT2 is grounded to GND.

[0047] The power module 30 has its signal output terminal connected in parallel with the second battery BAT2, and its power supply voltage input terminal connected to the positive terminal of the first battery BAT1.

[0048] The power module 30 includes a voltage equalization unit 31. The sampling terminal of the voltage equalization unit 31 is connected to the positive terminal of the second battery BAT2 to collect the voltage of the second battery BAT2, so as to determine the voltage difference between the first battery BAT1 and the second battery BAT2. Based on the voltage difference, the magnitude of the target voltage signal output by the signal output terminal is adjusted to equalize the voltage of the first battery BAT1 and the second battery BAT2.

[0049] It should be noted that the low-voltage appliance 10 can be a 12V appliance, and the high-voltage appliance 20 can be a 24V appliance. Both the first battery BAT1 and the second battery BAT2 are 12V batteries. The negative terminal of the first battery BAT1 is connected to the positive terminal of the second battery BAT2, meaning the first battery BAT1 and the second battery BAT2 are connected in series. The positive terminal of the first battery BAT1 and the negative terminal of the second battery BAT2 are connected to the high-voltage appliance 20, meaning the first battery BAT1 and the second battery BAT2 are connected in series and then connected to the high-voltage appliance 20. Therefore, the first battery BAT1 and the second battery BAT2 can simultaneously supply power to the high-voltage appliance 20. The positive and negative terminals of the second battery BAT2 are connected to the low-voltage appliance 10, thus the second battery BAT2 can supply power to the low-voltage appliance 10. The signal output terminal of the power module 30 is connected in parallel with the second battery BAT2. Thus, the power module 30 can supply power to the second battery BAT2 to balance the voltage of the first battery BAT1 and the second battery BAT2, thereby eliminating the voltage difference between the first battery BAT1 and the second battery BAT2, so that the vehicle power supply device can stably output 12V and 24V voltage.

[0050] Additionally, it should be noted that the power supply voltage input terminal is used to receive the input 24V power supply voltage signal. The 24V power supply voltage signal is a voltage signal with a magnitude of 24V. After acquiring the voltage of the second battery BAT2, the voltage difference between the total voltage of the first battery BAT1 and the second battery BAT2 (generally the magnitude of the 24V power supply voltage signal) and the voltage of the second battery BAT2 is the voltage of the first battery BAT1. Then, by subtracting the voltage of the first battery BAT1 from the voltage of the second battery BAT2, the voltage difference between the first battery BAT1 and the second battery BAT2 can be obtained.

[0051] Furthermore, it should be noted that the signal output terminal includes a first port and a second port. The first port is connected to the positive terminal of the second battery BAT2, and the second port is connected to the negative terminal of the second battery BAT2. By adjusting the magnitude of the target voltage signal output by the signal output terminal, the power module 30 can perform a power replenishment operation on the second battery BAT2, thereby eliminating the voltage difference between the first battery BAT1 and the second battery BAT2, enabling the vehicle power supply device to stably output 12V and 24V voltages.

[0052] In one feasible implementation, please refer to Figure 2 The voltage equalization unit 31 may include:

[0053] Voltage sampling circuit 311, the sampling terminal of voltage sampling circuit 311 is connected to the positive terminal of the second battery BAT2, and is used to collect the voltage of the second battery BAT2;

[0054] The main control unit 312 has its input terminal connected to the output terminal of the voltage sampling circuit 311. It is used to determine the voltage difference between the first battery BAT1 and the second battery BAT2, and adjust the magnitude of the target voltage signal according to the voltage difference.

[0055] It should be noted that the voltage sampling circuit 311 can be a sampling resistor, a voltage sensor, or other devices with voltage sampling function, etc., and this embodiment does not specifically limit it. The main control unit 312 can be an MCU (Microcontroller Unit), and can also include a first comparator, a second comparator, an operational amplifier, a feedback resistor, and a signal modulator, or it can be a controller or a control device composed of other devices, etc., and this embodiment does not specifically limit the specific structure of the main control unit 312.

[0056] In the case where the main control unit 312 includes a first comparator, a second comparator, an operational amplifier, a feedback resistor, and a signal modulator, the first input terminal of the first comparator is connected to the total voltage of the first battery BAT1 and the second battery BAT2, the second input terminal of the first comparator is connected to the voltage of the second battery BAT2, the output terminal of the first comparator is connected to the first input terminal of the second comparator, and the second input terminal of the second comparator is connected to the voltage of the second battery BAT2. Thus, the first comparator can output the difference between the total voltage and the voltage of the second battery BAT2, i.e., the voltage of the first battery BAT1, and the second comparator can output the difference between the voltage of the first battery BAT1 and the voltage of the second battery BAT2, i.e., the voltage difference between the first battery BAT1 and the second battery BAT2.

[0057] The non-inverting input of the operational amplifier is connected to a reference voltage signal (i.e., a voltage signal with a voltage magnitude of 12V), the inverting input of the operational amplifier is connected to the voltage difference between the first battery BAT1 and the second battery BAT2, the inverting input of the operational amplifier is connected to the first end of the feedback resistor, and the output of the operational amplifier is connected to the second end of the feedback resistor and the input of the signal modulator. Therefore, the operational amplifier can output an error signal (for example, when the voltage of the second battery BAT2 is less than 12V, the voltage difference is positive, so the operational amplifier outputs a positive signal; otherwise, it outputs a negative signal). After receiving the error signal, the signal modulator will compare the magnitude of the error signal with that of a triangular wave carrier signal with a fixed frequency to determine whether the error signal is positive or negative. If it is positive, the signal modulator outputs a first pulse width modulation signal; if it is negative, the signal modulator outputs a second pulse width modulation signal. The duty cycle of the first pulse width modulation signal is greater than that of the second pulse width modulation signal. The signal modulator inputs the output pulse width modulation signal into the signal output circuit 34 in the power supply module 30, which adjusts the conduction time of the switching transistor in the signal output circuit 34, thereby adjusting the magnitude of the target voltage signal output by the signal output circuit 34.

[0058] Based on the above, this embodiment connects the first battery BAT1 and the second battery BAT2 in series with the high-voltage electrical appliance 20, and connects the second battery BAT2 in parallel with the power module 30 with the low-voltage electrical appliance 10. Therefore, the vehicle power supply device designed in this embodiment can achieve high-voltage (i.e., 24V) output using the first battery BAT1 and the second battery BAT2, and low-voltage (i.e., 12V) output using the second battery BAT2. Furthermore, this embodiment also includes a voltage equalization unit 31 in the power module 30. The voltage equalization unit 31 can collect the voltage of the second battery BAT2 to determine the voltage difference between the first battery BAT1 and the second battery BAT2. Based on the voltage difference, it adjusts the magnitude of the target voltage signal output by the signal output terminal, that is, adjusts the voltage provided by the power module 30 to the second battery BAT2 to replenish the power of the second battery BAT2, thereby balancing the voltage of the first battery BAT1 and the second battery BAT2, eliminating the voltage difference between them, so that the vehicle power supply device can stably output 12V and 24V voltages.

[0059] In summary, the vehicle power supply device described in this embodiment only requires two sets of batteries to stably output 12V and 24V voltages. Compared with conventional methods, this not only reduces its footprint in the vehicle system but also reduces the overall vehicle weight and cost.

[0060] Furthermore, this embodiment utilizes the power module 30 to replenish the second battery BAT2, preventing damage caused by over-discharge leading to an unhealthy State of Charge (SOC), thus extending the lifespan of the second battery BAT2. Additionally, by connecting the second battery BAT2 in parallel with the power module 30 and then connecting it to the low-voltage appliance 10, this embodiment allows the second battery BAT2 to provide redundant power to the low-voltage appliance 10 when the power module 30 fails.

[0061] In addition, when the vehicle system only receives a brief 24V power supply signal, the power module 30 can dynamically adjust the magnitude of the target voltage signal based on the voltage difference between the first battery BAT1 and the second battery BAT2. Therefore, after the vehicle system stops receiving the 24V power supply signal (i.e., after the vehicle system is powered off), the power module 30 can continue to dynamically adjust the magnitude of the target voltage signal to provide targeted power to the first battery BAT1 or the second battery BAT2, thereby ensuring that the vehicle system can maintain a stable voltage output for a period of time after power-off.

[0062] Based on the first embodiment described above, a second embodiment of the vehicle power supply device of this utility model is proposed. For the second embodiment, please refer to... Figure 3 The vehicle power supply unit may also include:

[0063] The intelligent power supply controller 40 is connected to the trigger signal input terminal of the power module 30. It is used to detect whether the voltage of the vehicle system is less than the preset voltage threshold. When the voltage of the vehicle system is detected to be less than the preset voltage threshold, the intelligent power supply controller 40 outputs a trigger signal to the power module 30 to trigger the power module 30 to work.

[0064] Trigger switch K1 is connected to the trigger signal input terminal of power module 30. After receiving the closing command issued by the user, trigger switch K1 enters the closed state to output a trigger signal to power module 30 to trigger power module 30 to work.

[0065] It should be noted that the intelligent power supply controller 40 is essentially a controller, which can consist of a voltage sensor and a comparator. The voltage sensor can be used to collect the voltage of the entire vehicle system. The output of the voltage sensor can be connected to the first input of the comparator, and the second input of the comparator can be connected to a preset voltage threshold. The output of the comparator is connected to the trigger signal input of the power module 30. Based on this, if the positive input of the comparator is connected to the output of the voltage sensor and the negative input of the comparator is connected to the preset voltage threshold, then the high-level signal output by the comparator is the trigger signal; if the positive input of the comparator is connected to the preset voltage threshold and the negative input of the comparator is connected to the output of the voltage sensor, then the low-level signal output by the comparator is the trigger signal. The preset voltage threshold serves as the basis for determining whether the voltage of the entire vehicle system is too low. It can be a default value or can be flexibly set by the user according to actual conditions; this embodiment does not impose specific limitations on this.

[0066] Understandably, after the power module 30 is triggered to work, the power module 30 will start to collect the voltage of the second battery BAT2, and dynamically adjust the magnitude of the target voltage signal according to the voltage difference between the first battery BAT1 and the second battery BAT2, so as to balance the voltage of the first battery BAT1 and the second battery BAT2.

[0067] This embodiment can also include an intelligent power supply controller 40 and a trigger switch K1 in the vehicle power supply device. When the voltage of the vehicle system is low, the vehicle power supply device can automatically trigger the power module 30 to work using the intelligent power supply controller 40. In addition, the user can use the trigger switch K1 to trigger the power module 30 to work independently.

[0068] Based on the first and / or second embodiments described above, a third embodiment of the vehicle power supply device of this utility model is proposed. In the third embodiment, please refer to... Figure 4 The vehicle power supply unit may also include:

[0069] The fault alarm module 50 is connected to the power supply module 30 and is used to output an alarm signal when it receives a fault signal from the power supply module 30.

[0070] It should be noted that the fault alarm module 50 can be a gateway or other device with alarm functions, and this embodiment does not specifically limit it. When the fault alarm module 50 is a gateway, it can be connected to the power module 30 via a CAN (Controller Area Network) bus. The fault signal can carry fault information such as overvoltage and overcurrent. Therefore, in one feasible implementation, the power module can also include an overvoltage detection circuit and an overcurrent detection circuit, and the valid signals output by the overvoltage detection circuit and the overcurrent detection circuit are the fault signals.

[0071] This embodiment can also include a fault alarm module 50 in the vehicle power supply device. After the power module 30 outputs a fault signal, the fault alarm module 50 can output an alarm prompt signal to remind the user in time that there is a fault in the vehicle system, so as to repair the fault in time and ensure the normal operation of the vehicle system.

[0072] Based on the first, second, and / or third embodiments described above, a fourth embodiment of the vehicle power supply device of this utility model is proposed. In the fourth embodiment, please refer to... Figure 5 The power module 30 may also include:

[0073] The signal input circuit 32 has its input terminal serving as the power supply voltage input terminal of the power module 30. It is connected to the positive terminal of the first battery BAT1 and is used to receive the 24V power supply voltage signal.

[0074] The signal processing circuit 33 has its input terminal connected to the output terminal of the signal input circuit 32. It is used to process the 24V power supply voltage signal to generate the target voltage signal.

[0075] The input terminal of the signal output circuit 34 is connected to the output terminal of the signal processing circuit 33. The output terminal of the signal output circuit 34 is connected in parallel with the second battery BAT2 as the signal output terminal of the power module 30. The control terminal of the signal output circuit 34 is connected to the output terminal of the voltage equalization unit 31 for outputting the target voltage signal.

[0076] It should be noted that the signal input circuit 32 can be an EMI (Electromagnetic Interference) filter circuit to filter out noise signals in the 24V power supply voltage signal.

[0077] In one feasible implementation, please refer to Figure 6 The signal processing circuit 33 may include a power conversion sub-circuit and a synchronous rectifier sub-circuit 332;

[0078] The input terminal of the power conversion sub-circuit is connected to the output terminal of the signal input circuit 32, the output terminal of the power conversion sub-circuit is connected to the input terminal of the synchronous rectifier sub-circuit 332, and the output terminal of the synchronous rectifier sub-circuit 332 is connected to the input terminal of the signal output circuit 34.

[0079] It should be noted that the power conversion sub-circuit can adopt a four-way full-bridge topology. Each power transistor in the power conversion sub-circuit can be connected to the driver circuit, allowing the driver circuit to control the conduction and disconnection of each power transistor. The synchronous rectifier sub-circuit 332 can employ an active clamping circuit to improve rectification efficiency.

[0080] In one feasible implementation, please refer to Figure 6 The signal output circuit 34 may include an output sub-circuit 341 and an output anti-reverse sub-circuit 342;

[0081] The input terminal of the output sub-circuit 341 is connected to the output terminal of the signal processing circuit 33, the output terminal of the output sub-circuit 341 is connected to the input terminal of the output anti-reverse sub-circuit 342, the control terminal of the output sub-circuit 341 is connected to the output terminal of the voltage equalization unit 31, and the output terminal of the output anti-reverse sub-circuit 342 is connected in parallel with the second battery BAT2 as the signal output terminal of the power module 30.

[0082] It should be noted that the output sub-circuit 341 can use a filter circuit, and the output anti-reverse sub-circuit 342 can include diodes and optocouplers.

[0083] This embodiment adopts a reverse protection design in the signal output circuit 34 of the power module 30. This not only achieves reverse connection protection, but also isolation protection, to ensure that the back-end equipment works normally when connected in the correct direction and is completely powered off when connected in the reverse direction, thereby improving the safety of the entire vehicle system.

[0084] In addition, this utility model embodiment also provides a vehicle system, which includes the vehicle power supply device of the above embodiments.

[0085] The vehicle system provided in this embodiment can achieve stable output of 12V and 24V voltage using two sets of batteries, which not only reduces the space occupied by the vehicle system, but also reduces the weight and cost of the vehicle. Since the vehicle system in this embodiment includes all the technical solutions of all the above-described vehicle power supply device embodiments, and the technical effects achieved are exactly the same, they will not be repeated here.

[0086] In addition, this utility model embodiment also provides a vehicle, which includes a vehicle body and the vehicle system described in the above embodiment, with the vehicle system disposed on the vehicle body.

[0087] The vehicle provided in this embodiment can achieve stable output of 12V and 24V voltage using two sets of batteries, which not only reduces the space occupied by the entire vehicle system, but also reduces the overall vehicle weight and cost. Since the vehicle in this embodiment includes all the technical solutions of all the above-described vehicle system embodiments, and the achieved technical effects are exactly the same, they will not be repeated here.

[0088] The above are merely preferred embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A vehicle power supply device, characterized in that, include: Low-voltage electrical appliances and high-voltage electrical appliances; A first battery and a second battery, wherein the negative terminal of the first battery is connected to the positive terminal of the second battery, the positive terminal of the first battery and the negative terminal of the second battery are connected to the high-voltage electrical appliance, the positive terminal and the negative terminal of the second battery are connected to the low-voltage electrical appliance, and the negative terminal of the second battery is grounded. A power module, wherein the signal output terminal of the power module is connected in parallel with the second battery, and the power supply voltage input terminal of the power module is connected to the positive terminal of the first battery; The power module includes a voltage equalization unit. The sampling terminal of the voltage equalization unit is connected to the positive terminal of the second battery to collect the voltage of the second battery, determine the voltage difference between the first battery and the second battery, and adjust the magnitude of the target voltage signal output by the signal output terminal according to the voltage difference to equalize the voltage of the first battery and the second battery.

2. The vehicle power supply device as described in claim 1, characterized in that, The voltage equalization unit includes: A voltage sampling circuit, wherein the sampling terminal of the voltage sampling circuit is connected to the positive terminal of the second battery, and is used to collect the voltage of the second battery; The main control unit, whose input terminal is connected to the output terminal of the voltage sampling circuit, is used to determine the voltage difference between the first battery and the second battery, and adjust the magnitude of the target voltage signal according to the voltage difference.

3. The vehicle power supply device as described in claim 1, characterized in that, The power module also includes: The signal input circuit has its input terminal serving as the power supply voltage input terminal of the power module and connected to the positive terminal of the first battery to receive a 24V power supply voltage signal. A signal processing circuit, wherein the input terminal of the signal processing circuit is connected to the output terminal of the signal input circuit, is used to process the 24V power supply voltage signal to generate the target voltage signal; The signal output circuit has its input terminal connected to the output terminal of the signal processing circuit. The output terminal of the signal output circuit is connected in parallel with the second battery as the signal output terminal of the power module. The control terminal of the signal output circuit is connected to the output terminal of the voltage equalization unit and is used to output the target voltage signal.

4. The vehicle power supply device as described in claim 3, characterized in that, The signal output circuit includes an output sub-circuit and an output anti-reverse sub-circuit; The input terminal of the output sub-circuit is connected to the output terminal of the signal processing circuit, the output terminal of the output sub-circuit is connected to the input terminal of the output anti-reverse sub-circuit, the control terminal of the output sub-circuit is connected to the output terminal of the voltage equalization unit, and the output terminal of the output anti-reverse sub-circuit is connected in parallel with the second battery as the signal output terminal of the power module.

5. The vehicle power supply device as described in any one of claims 1 to 4, characterized in that, The vehicle power supply device also includes: The intelligent power supply controller is connected to the trigger signal input terminal of the power module. It is used to detect whether the voltage of the vehicle system is less than a preset voltage threshold. When the voltage of the vehicle system is detected to be less than the preset voltage threshold, the controller outputs a trigger signal to the power module to trigger the power module to work.

6. The vehicle power supply device as described in any one of claims 1 to 4, characterized in that, The vehicle power supply device also includes: A trigger switch is connected to the trigger signal input terminal of the power module. After receiving a closing command from the user, the trigger switch enters a closed state to output a trigger signal to the power module to trigger the power module to work.

7. The vehicle power supply device as described in any one of claims 1 to 4, characterized in that, The vehicle power supply device also includes: The fault alarm module is connected to the power supply module and is used to output an alarm signal when it receives a fault signal from the power supply module.

8. The vehicle power supply device as described in any one of claims 1 to 4, characterized in that, The high-voltage electrical appliance is a 24V electrical appliance, and the low-voltage electrical appliance is a 12V electrical appliance.

9. A vehicle system, characterized in that, The vehicle system includes a vehicle power supply device as described in any one of claims 1 to 8.

10. A vehicle, characterized in that, The vehicle includes a vehicle body and a vehicle system as described in claim 9, wherein the vehicle system is disposed on the vehicle body.

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