Power supply system and vehicle

Abstract

The utility model provides a power supply system and a vehicle, and the power supply system comprises a first power supply, a second power supply, a battery management system BMS module, a voltage reduction module, and a first switching module. Wherein the BMS module is arranged in the second power supply, the voltage reduction module is arranged in the BMS module, the power supply end of the voltage reduction module is connected with the power supply end of the second power supply, and the voltage reduction module is used for reducing the output voltage of the second power supply to the output voltage of the first power supply; the first switching module is arranged in the BMS module, the first power supply end of the first switching module is connected with the power supply end of the first power supply, the second power supply end of the first switching module is connected with the power supply end of the voltage reduction module, and the power supply end of the first switching module is connected with the power supply end of the BMS module. According to the power supply system and the vehicle, efficient integration of the second power supply, the BMS module and the voltage reduction module is achieved, so that external wiring is omitted, the power supply cost of the BMS module is reduced, and risks such as poor contact and transient interruption are avoided.

Description

Technical Field

[0001] The present disclosure relates to the field of power supply technology, and in particular to a power supply system and a vehicle. Background Art

[0002] With the continuous improvement of industrial level, the performance requirements for vehicles are getting higher and higher. Among them, the stable operation of BMS (Battery Management System) is one of the key factors that determine vehicle performance. However, the power supply of BMS is currently achieved through external wiring, and excessively long external wiring has risks such as poor contact and momentary disconnection. As a result, BMS is prone to abnormalities or even failures, making it difficult to meet the vehicle's usage needs. Summary of the invention

[0003] The present disclosure aims to solve one of the technical problems in the related art at least to some extent.

[0004] To this end, an object of the present disclosure is to provide a power supply system and a vehicle.

[0005] To achieve the above-mentioned purpose, the first aspect of the present disclosure provides a power supply system, comprising: a first power supply, a second power supply, a battery management system BMS module, a step-down module and a first switching module; wherein the BMS module is arranged in the second power supply, the step-down module is arranged in the BMS module, the power supply end of the step-down module is connected to the power supply end of the second power supply, and the step-down module is used to reduce the output voltage of the second power supply to the output voltage of the first power supply; the first switching module is arranged in the BMS module, the first power supply end of the first switching module is connected to the power supply end of the first power supply, the second power supply end of the first switching module is connected to the power supply end of the step-down module, and the power supply end of the first switching module is connected to the power supply end of the BMS module.

[0006] Optionally, the power supply system also includes: a second switching module, the first power supply end of the second switching module is connected to the power supply end of the first power supply, the second power supply end of the second switching module is connected to the power supply end of the step-down module, and the power supply end of the second switching module is respectively connected to the first power supply end of the first switching module and the power supply end of the load; wherein, when the path between the first power supply end and the power supply end of the first switching module is connected, the path between the first power supply end and the power supply end of the second switching module is connected; when the path between the second power supply end and the power supply end of the first switching module is connected, the path between the second power supply end and the power supply end of the second switching module is connected.

[0007] Optionally, the first power supply includes: a DC-DC converter, a power supply end of the DC-DC converter is connected to a power supply end of the second power supply, and the power supply end of the DC-DC converter is connected to a first power supply end of the second switching module.

[0008] Optionally, the first power supply further includes: a first switch, the first switch is arranged between the power supply end of the DC-DC converter and the power supply end of the second power supply, and the input end of the first switch is connected to the output end of the BMS module.

[0009] Optionally, the first power source further includes: a battery, and a power supply end of the battery is connected to the first power supply end of the second switching module.

[0010] Optionally, the power supply system also includes: a drive control module, which is arranged in the BMS module, and the drive control module is connected in series between the power supply end of the step-down module and the power supply end of the second power supply, and the input end of the drive control module is connected to the output end of the BMS module.

[0011] Optionally, the BMS module includes: a microcontroller MCU unit, the input end of the MCU unit is connected to the output end of the domain controller in the load, and the output end of the MCU unit is connected to the input end of the drive control module, and the MCU unit is used to wake up the drive control module.

[0012] Optionally, the step-down module includes: a flyback transformer, which is arranged in the BMS module, the power supply end of the flyback transformer is connected to the power supply end of the second power supply, the power supply end of the flyback transformer is connected to the second power supply end of the first switching module, and the flyback transformer is used to reduce the output voltage of the second power supply to the output voltage of the first power supply.

[0013] Optionally, the power supply system further includes: a second switch, which is disposed in the BMS module and is connected in series between the second power supply end of the first switching module and the power supply end of the buck module.

[0014] Optionally, the second power supply includes: a plurality of battery cells, the plurality of battery cells are connected in series and / or in parallel, and the power supply end of the step-down module is connected to the power supply ends of the plurality of battery cells.

[0015] Optionally, the output voltage of the first power supply is 12V.

[0016] A second aspect of the present disclosure provides a vehicle, comprising: a power supply system as provided in the first aspect of the present disclosure.

[0017] The technical solution provided by the present disclosure may have the following beneficial effects:

[0018] Through the cooperation of the step-down module and the first switching module, the first power supply with a lower voltage can supply power to the BMS module, and at the same time, the second power supply with a higher voltage can also supply power to the BMS module, thereby realizing redundant power supply of the BMS module; moreover, since the BMS module is arranged in the second power supply, and the step-down module is arranged in the BMS module, the second power supply, the BMS module and the step-down module are efficiently integrated, thereby eliminating external wiring, which not only reduces the power supply cost of the BMS module, but also avoids risks such as poor contact and instantaneous disconnection. As a result, the power supply system has a high robustness, which can ensure the efficient and stable operation of the BMS module, thereby meeting the use requirements of the vehicle.

[0019] Additional aspects and advantages of the present disclosure will be given in part in the following description and in part will be obvious from the following description or learned through practice of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The above and / or additional aspects and advantages of the present disclosure will become apparent and easily understood from the following description of the embodiments in conjunction with the accompanying drawings, in which:

[0021] Figure 1 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure;

[0022] Figure 2 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure;

[0023] Figure 3 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure (when the first power supply is supplying power);

[0024] Figure 4 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure (when the second power supply is supplying power);

[0025] Figure 5 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure;

[0026] Figure 6 is a circuit diagram of a power supply system proposed in an embodiment of the present disclosure;

[0027] As shown in the figure: 1. first power supply, 11. DC-DC converter, 12. first switch, 13. battery;

[0028] 2. A second power source, 21. A battery cell;

[0029] 3. BMS module, 31. MCU unit;

[0030] 4. Buck module, 41. Flyback transformer;

[0031] 5. A first switching module, 6. A second switching module, 7. A second switch, 8. A load, 9. A drive control module. DETAILED DESCRIPTION

[0032] Embodiments of the present disclosure are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure, and are not to be construed as limitations of the present disclosure. On the contrary, the embodiments of the present disclosure include all changes, modifications, and equivalents that fall within the spirit and connotation of the appended claims.

[0033] Currently, the power supply of BMS (Battery Management System) is realized through external wiring, and the excessively long external wiring has the risk of poor contact and momentary disconnection, which makes the BMS prone to abnormalities or even failure, making it difficult to meet the vehicle's usage requirements.

[0034] In a related embodiment, the BMS is powered by two additional power supplies, and both power supplies use external wiring. Although this method can utilize two power supplies to achieve redundant power supply for the BMS, since the two power supplies still use external wiring, the BMS still has a high probability of abnormalities or even failure. At the same time, the two additional power supplies will also increase the power supply cost of the BMS, making it difficult to meet usage requirements.

[0035] like Figure 1 As shown, an embodiment of the present disclosure proposes a power supply system, including: a first power supply 1, a second power supply 2, a BMS module 3, a step-down module 4 and a first switching module 5, wherein the BMS module 3 is arranged in the second power supply 2, the step-down module 4 is arranged in the BMS module 3, the power supply end of the step-down module 4 is connected to the power supply end of the second power supply 2, the step-down module 4 is used to reduce the output voltage of the second power supply 2 to the output voltage of the first power supply 1, the first switching module 5 is arranged in the BMS module 3, the first power supply 1 end of the first switching module 5 is connected to the power supply end of the first power supply 1, the second power supply 2 end of the first switching module 5 is connected to the power supply end of the step-down module 4, and the power supply end of the first switching module 5 is connected to the power supply end of the BMS module 3.

[0036] It can be understood that when the path between the first power supply 1 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the first power supply 1 and the power supply end of the BMS module 3 is also connected, so that the first power supply 1 can supply power to the BMS module 3; when the path between the second power supply 2 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the step-down module 4 and the power supply end of the BMS module 3 is also connected, so that the second power supply 2 can supply power to the BMS module 3.

[0037] Among them, through the cooperation of the step-down module 4 and the first switching module 5, the first power supply 1 with a lower voltage can supply power to the BMS module 3, and at the same time, the second power supply 2 with a higher voltage can also supply power to the BMS module 3, thereby realizing redundant power supply of the BMS module 3; and, since the BMS module 3 is arranged in the second power supply 2, and the step-down module 4 is arranged in the BMS module 3, the second power supply 2, the BMS module 3 and the step-down module 4 are efficiently integrated, thereby eliminating external wiring, which not only reduces the power supply cost of the BMS module 3, but also avoids the risks of poor contact, instantaneous disconnection, etc. As a result, the power supply system has a high robustness, which can ensure the efficient and stable operation of the BMS module 3, thereby meeting the use requirements of the vehicle.

[0038] It should be noted that the first power supply 1 is a power supply with a relatively low output voltage, and it is independently designed from the BMS module 3. The specific type of the first power supply 1 can be set according to actual needs, and there is no restriction on this. Among them, the first power supply 1 is connected to the first power supply 1 end of the first switching module 5 through external wiring, but the external wiring is prone to poor contact and instantaneous disconnection due to reasons such as damaged wiring harness and loose bolts. Therefore, the power backup of the second power supply 2 can ensure the stable and efficient power supply of the BMS module 3.

[0039] The second power supply 2 is a power supply with a higher output voltage, which is integrated with the BMS module 3. The specific type of the second power supply 2 can be set according to actual needs, and there is no restriction on this. Among them, the second power supply 2 and the BMS module 3 are effectively integrated to avoid problems such as poor contact and momentary disconnection caused by external wiring, so that when the first power supply 1 is abnormal, it can provide stable power supply to the BMS module 3, thereby ensuring the efficient and stable operation of the BMS module 3.

[0040] Among them, due to the different settings of the first power supply 1 and the second power supply 2, the power supply methods therebetween are quite different. Therefore, under the switching cooperation of the first switching module 5, mutual interference between the first power supply 1 and the second power supply 2 can be avoided, thereby ensuring the stable power supply of the BMS module 3.

[0041] When the power supply system is applied in a vehicle, the first power supply 1 and the second power supply 2 can also supply power to other loads 8, and at the same time, can also provide a stable static current for the vehicle system, thereby ensuring the stable operation of the vehicle system.

[0042] The step-down module 4 is used to reduce the output voltage of the second power supply 2 to the output voltage of the first power supply 1. The step-down module 4 is integrated in the BMS module 3. The specific type of the step-down module 4 can be set according to actual needs and is not limited to this.

[0043] The first switching module 5 is used for switching the path between the first power source 1 and the BMS module 3 and the path between the second power source 2 and the BMS module 3. The specific type of the first switching module 5 can be set according to actual needs and is not limited to this. For example, the first switching module 5 can be an OR gate logic circuit or other circuits or devices capable of switching paths.

[0044] The first switching module 5 can switch the path according to the power supply status of the first power supply 1. For example, when the output voltage amplitude of the first power supply 1 is above the set threshold, that is, the power supply of the first power supply 1 is normal, the first switching module 5 makes the path between the first power supply 1 and the BMS module 3 conductive; when the output voltage amplitude of the first power supply 1 is less than the set threshold, that is, the power supply of the first power supply 1 is abnormal, the first switching module 5 makes the path between the second power supply 2 and the BMS module 3 conductive.

[0045] Among them, the first switching module 5 can use detection units such as sensors to detect the output voltage of the first power supply 1, and use a control chip and multiple switches to switch the path between the first power supply 1 and the BMS module 3 and the path between the second power supply 2 and the BMS module 3.

[0046] like Figure 2 , Figure 3 and Figure 4 As shown, in some embodiments, the power supply system also includes: a second switching module 6, the first power supply 1 end of the second switching module 6 is connected to the power supply end of the first power supply 1, the second power supply 2 end of the second switching module 6 is connected to the power supply end of the step-down module 4, and the power supply end of the second switching module 6 is respectively connected to the first power supply 1 end of the first switching module 5 and the power supply end of the load 8, wherein when the path between the first power supply 1 end and the power supply end of the first switching module 5 is connected, the path between the first power supply 1 end and the power supply end of the second switching module 6 is connected, and when the path between the second power supply 2 end and the power supply end of the first switching module 5 is connected, the path between the second power supply 2 end and the power supply end of the second switching module 6 is connected.

[0047] It can be understood that when the path between the first power supply 1 end and the power supply end of the first switching module 5 and the path between the first power supply 1 end and the power supply end of the second switching module 6 are turned on, the path between the power supply end of the first power supply 1 and the power supply end of the BMS module 3 is turned on, so that the first power supply 1 can supply power to the BMS module 3; when the path between the second power supply 2 end and the power supply end of the first switching module 5 and the path between the second power supply 2 end and the power supply end of the second switching module 6 are turned on, the path between the power supply end of the step-down module 4 and the power supply end of the BMS module 3 is turned on, so that the second power supply 2 can supply power to the BMS module 3.

[0048] At the same time, when the path between the first power supply 1 end and the power supply end of the second switching module 6 is turned on, the path between the power supply end of the first power supply 1 and the power supply end of the load 8 is also turned on, so that the first power supply 1 can supply power to the load 8; when the path between the second power supply 2 end and the power supply end of the second switching module 6 is turned on, the path between the power supply end of the step-down module 4 and the power supply end of the load 8 is also turned on, so that the second power supply 2 can supply power to the load 8.

[0049] Therefore, through the switching coordination of the first switching module 5 and the second switching module 6, redundant power supply of the BMS module 3 and the load 8 is achieved, ensuring efficient and stable operation of the BMS module 3 and the load 8.

[0050] It should be noted that the second switching module 6 is used for switching the path between the first power supply 1 and the first power supply 1 end of the first switching module 5 and the path between the second power supply 2 and the first power supply 1 end of the first switching module 5, as well as switching the path between the first power supply 1 and the load 8 and the path between the second power supply 2 and the load 8. The specific type of the second switching module 6 can be set according to actual needs and is not limited to this. By way of example, the second switching module 6 can be an OR gate logic circuit or other circuits or devices capable of switching paths.

[0051] The second switching module 6 can switch the path according to the switching state of the first switching module 5 or the power supply state of the first power supply 1. For example, when the output voltage amplitude of the first power supply 1 is above the set threshold, that is, the power supply of the first power supply 1 is normal, the first switching module 5 and the second switching module 6 make the path between the first power supply 1 and the BMS module 3 and the path between the first power supply 1 and the load 8 conductive; when the output voltage amplitude of the first power supply 1 is less than the set threshold, that is, the power supply of the first power supply 1 is abnormal, the first switching module 5 and the second switching module 6 make the path between the second power supply 2 and the BMS module 3 and the path between the second power supply 2 and the load 8 conductive.

[0052] The second switching module 6 can use a detection unit such as a sensor to detect the output voltage of the first power supply 1, and use a control chip and a plurality of switches to switch between the paths.

[0053] like Figure 5 As shown, in some embodiments, the first power supply 1 includes: a DC-to-DC converter 11 (DC-to-DC converter), the power supply end of the DC-to-DC converter 11 is connected to the power supply end of the second power supply 2, and the power supply end of the DC-to-DC converter 11 is connected to the first power supply 1 end of the second switching module 6.

[0054] It can be understood that since the power supply end of the DC-DC converter 11 is connected to the power supply end of the second power supply 2, and the power supply end of the DC-DC converter 11 is connected to the first power supply 1 end of the second switching module 6, the DC-DC converter 11 can convert the output electric energy of the second power supply 2 and transmit it to the first power supply 1 end of the second switching module 6. Therefore, when the path between the first power supply 1 end and the power supply end of the first switching module 5 and the path between the first power supply 1 end and the power supply end of the second switching module 6 are turned on, the second power supply 2 can use the DC-DC converter 11 to power the BMS module 3 and the load 8, thereby meeting the usage requirements.

[0055] It should be noted that the DC-DC converter 11 is also called a DC-DC converter. The DC-DC converter 11 is a circuit or device for converting electric energy. It can convert a DC power supply into a DC (or approximate DC) power supply of different voltages. The specific type of the DC-DC converter 11 can be set according to actual needs and is not limited to this.

[0056] Among them, since the DC-DC converter 11 can output a large power, it can be used as a common power supply to power the BMS module 3 and the load 8. However, due to the large power of the DC-DC converter 11, its size is large and it is difficult to integrate into the second power supply 2. Therefore, it needs to be connected to the second power supply 2 using external wires.

[0057] like Figure 5 As shown, in some embodiments, the first power supply 1 also includes: a first switch 12, the first switch 12 is arranged between the power supply end of the DC-DC converter 11 and the power supply end of the second power supply 2, and the input end of the first switch 12 is connected to the output end of the BMS module 3.

[0058] It can be understood that since the first switch 12 is arranged between the power supply end of the DC-DC converter 11 and the power supply end of the second power supply 2, and the input end of the first switch 12 is connected to the output end of the BMS module 3, the BMS module 3 can utilize the on-off control of the first switch 12 to realize the path control between the DC-DC converter 11 and the second power supply 2, thereby meeting the flexible power supply demand. At the same time, since the DC-DC converter 11 is arranged after the first switch 12 in the power supply path, the DC-DC converter 11 cannot obtain power after the first switch 12 is disconnected, thereby making the operation of the DC-DC converter 11 safer and more stable.

[0059] It should be noted that the first switch 12 is used to control the on / off of the path between the DC-DC converter 11 and the second power supply 2. The specific type of the first switch 12 can be set according to actual needs and is not limited to this. For example, the first switch 12 can be a relay, and the first switch 12 can be integrated in the second power supply 2.

[0060] like Figure 5 As shown, in some embodiments, the first power source 1 further includes: a battery 13 , and a power supply end of the battery 13 is connected to the first power source 1 end of the second switching module 6 .

[0061] It can be understood that since the power supply end of the battery 13 is connected to the first power supply 1 end of the second switching module 6, the battery 13 can directly transmit electric energy to the first power supply 1 end of the second switching module 6. Therefore, when the path between the first power supply 1 end and the power supply end of the first switching module 5 and the path between the first power supply 1 end and the power supply end of the second switching module 6 are turned on, the battery 13 can supply power to the BMS module 3 and the load 8, thereby meeting the usage requirements.

[0062] It should be noted that the storage battery 13 is an electrochemical device that stores chemical energy and releases electrical energy when necessary. The specific type of the storage battery 13 can be set according to actual needs and is not limited to this.

[0063] Since the output power of the battery 13 is limited, it can be used as a starting power supply for the BMS module 3 and the load 8, and the DC-DC converter 11 is used as a common power supply for the BMS module 3 and the load 8, wherein the switching of the path between the power supply end of the battery 13 and the first power supply 1 end of the second switching module 6 and the path between the power supply end of the DC-DC converter 11 and the first power supply 1 end of the second switching module 6 can be achieved through the first switch 12, and the on and off of the first switch 12 is controlled by the BMS module 3.

[0064] like Figure 6As shown, in some embodiments, the power supply system also includes: a drive control module 9, which is arranged in the BMS module 3, and the drive control module 9 is connected in series between the power supply end of the step-down module 4 and the power supply end of the second power supply 2, and the input end of the drive control module 9 is connected to the output end of the BMS module 3.

[0065] It can be understood that, since the drive control module 9 is connected in series between the power supply end of the step-down module 4 and the power supply end of the second power supply 2, and the input end of the drive control module 9 is connected to the output end of the BMS module 3, the BMS module 3 can use the drive control module 9 to realize the drive control of the step-down module 4, ensuring that the step-down module 4 can reduce the output voltage of the second power supply 2 to the output voltage of the first power supply 1. At the same time, since the drive control module 9 is set in the BMS module 3, the second power supply 2, the BMS module 3, the step-down module 4 and the drive control module 9 are efficiently integrated, thereby eliminating external wiring, which not only reduces the power supply cost of the BMS module 3 and the load 8, but also avoids the risks of poor contact and instantaneous disconnection. As a result, the power supply system has a high robustness, which can ensure the efficient and stable operation of the BMS module 3 and the load 8, thereby meeting the use requirements of the vehicle.

[0066] It should be noted that the driving control module 9 is used to drive the buck module 4 and control the output voltage of the buck module 4. The specific type of the driving control module 9 can be set according to actual needs and is not limited thereto.

[0067] like Figure 6 As shown, in some embodiments, the BMS module 3 includes: an MCU (Micro Controller Unit) unit 31, the input end of the MCU unit 31 is connected to the output end of the domain controller in the load 8, and the output end of the MCU unit 31 is connected to the input end of the drive control module 9, and the MCU unit 31 is used to wake up the drive control module 9.

[0068] It can be understood that since the input end of the MCU unit 31 is connected to the output end of the domain controller in the load 8, and the output end of the MCU unit 31 is connected to the input end of the drive control module 9, the MCU unit 31 can wake up the drive control module 9 according to the signal sent by the domain controller, so as to utilize the drive control module 9 to realize the drive control of the buck module 4, thereby ensuring that the buck module 4 can stably provide power to the load 8.

[0069] It should be noted that the MCU unit 31 is used to wake up the drive control module 9 according to the output signal of the domain controller. The specific type of the MCU unit 31 can be set according to actual needs and is not limited to this.

[0070] The domain controller manages and controls multiple embedded electronic control units (ECUs) in the vehicle system. As the hub of the vehicle electronic system, it processes and distributes data to achieve coordination and communication between various ECUs to achieve comprehensive control and optimization of the vehicle system. The specific type of the domain controller can be set according to actual needs and is not limited. Among them, the input end of the domain controller can be connected to the output end of the vibration sensor, the power supply end of the buck module 4 is connected to the power supply end of the camera in the load 8, and when the vibration sensor detects a vibration signal, the domain controller outputs a signal to the MCU unit 31 to wake up the drive control module 9, so that the drive control module 9 can use the buck module 4 to power the camera, ensuring the stable implementation of the vehicle sentry mode.

[0071] like Figure 5 As shown, in some embodiments, the step-down module 4 includes: a flyback transformer 41 (FlybackTransformer), the flyback transformer 41 is arranged in the BMS module 3, the power supply end of the flyback transformer 41 is connected to the power supply end of the second power supply 2, the power supply end of the flyback transformer 41 is connected to the second power supply 2 end of the first switching module 5, and the flyback transformer 41 is used to reduce the output voltage of the second power supply 2 to the output voltage of the first power supply 1.

[0072] It can be understood that since the power supply end of the flyback transformer 41 is connected to the power supply end of the second power supply 2, and the power supply end of the flyback transformer 41 is connected to the second power supply 2 end of the first switching module 5, the flyback transformer 41 can reduce the output voltage of the second power supply 2, so that when the path between the second power supply 2 end and the power supply end of the first switching module 5 and the path between the second power supply 2 end and the power supply end of the second switching module 6 are turned on, the second power supply 2 can use the flyback transformer 41 to provide stable power supply to the BMS module 3 and the load 8, thereby ensuring efficient and stable operation of the BMS module 3 and the load 8.

[0073] At the same time, since the flyback transformer 41 has the characteristics of simple circuit structure, low cost, low power, etc., the flyback transformer 41 is easy to be integrated into the BMS module 3, thereby meeting the high-performance operation requirements of the power supply system.

[0074] It should be noted that the flyback transformer 41 is also called a single-ended flyback or Buck-Boost converter, and the specific type of the flyback transformer 41 can be set according to actual needs and is not limited thereto.

[0075] like Figure 1 As shown, in some embodiments, the power supply system further includes: a second switch 7, which is disposed in the BMS module 3, and the second switch 7 is connected in series between the second power supply end of the first switching module 5 and the power supply end of the buck module 4.

[0076] It can be understood that since the second switch 7 is connected in series between the second power supply end of the first switching module 5 and the power supply end of the step-down module 4, the second switch 7 can control the on-off of the path between the second power supply end of the first switching module 5 and the power supply end of the step-down module 4. Therefore, through the setting of the second switch 7, the path between the second power supply end of the first switching module 5 and the power supply end of the step-down module 4 can be quickly cut off in an emergency, thereby ensuring the stable operation of the power supply system.

[0077] It should be noted that the second switch 7 is used to control the on / off of the path between the second power supply end of the first switching module 5 and the power supply end of the step-down module 4. The specific type of the second switch 7 can be set according to actual needs and is not limited to this.

[0078] In some embodiments, the power supply system further includes: a wire, which is arranged between the power supply end of the step-down module 4 and the power supply end of the second power supply 2, and the equivalent diameter of the wire is greater than a set threshold.

[0079] It can be understood that, since the wire is arranged between the power supply end of the step-down module 4 and the power supply end of the second power supply 2, the electric energy output by the second power supply 2 can be transmitted to the step-down module 4 by the wire, and at the same time, since the equivalent diameter of the wire is greater than the set threshold, the wire can transmit electric energy of a higher voltage. Therefore, by setting the wire, it is ensured that the second power supply 2 provides stable power to the BMS module 3 and the load 8, thereby meeting the requirements of efficient and stable operation of the BMS module 3 and the load 8.

[0080] It should be noted that the wire is used for the transmission of electric energy, and the specific type of the wire can be set according to actual needs, and there is no restriction on this. The threshold value can be determined according to the output voltage of the second power source 2, and the setting of the threshold value should ensure that the wire can stably transmit the electric energy output by the second power source 2.

[0081] like Figure 5 As shown, in some embodiments, the second power supply 2 includes: a plurality of battery cells 21 , the plurality of battery cells 21 are connected in series and / or in parallel, and the power supply end of the step-down module 4 is connected to the power supply ends of the plurality of battery cells 21 .

[0082] It can be understood that the plurality of battery cells 21 constitute the second power source 2 , and due to the series and / or parallel connection of the plurality of battery cells 21 , the second power source 2 can have a higher output voltage, thereby meeting different usage requirements.

[0083] It should be noted that multiple battery cells 21 constitute the second power supply 2, which can not only supply power to the BMS module 3 and the load 8, but also can be used as a power battery in the vehicle. The specific type of the battery cell 21 can be set according to actual needs and is not limited to this.

[0084] In some embodiments, the output voltage of the first power supply 1 is 12V.

[0085] It can be understood that when the path between the first power supply 1 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the first power supply 1 and the power supply end of the BMS module 3 is also connected, so that the first power supply 1 can provide 12V power to the BMS module 3, and when the path between the second power supply 2 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the step-down module 4 and the power supply end of the BMS module 3 is also connected, so that the second power supply 2 can provide 12V power to the BMS module 3. In this way, the efficient and stable operation of the BMS module 3 is guaranteed.

[0086] It should be noted that, since the output voltage of the first power supply 1 is 12V, the output voltages of the DC-DC converter 11 and the battery 13 are both 12V, and the output voltage of the step-down module 4 is also 12V.

[0087] The embodiment of the present disclosure also provides a vehicle, including: a power supply system as the embodiment of the present disclosure.

[0088] It can be understood that when the path between the first power supply 1 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the first power supply 1 and the power supply end of the BMS module 3 is also connected, so that the first power supply 1 can supply power to the BMS module 3; when the path between the second power supply 2 end and the power supply end of the first switching module 5 is connected, the path between the power supply end of the step-down module 4 and the power supply end of the BMS module 3 is also connected, so that the second power supply 2 can supply power to the BMS module 3.

[0089] Among them, through the cooperation of the step-down module 4 and the first switching module 5, the first power supply 1 with a lower voltage can supply power to the BMS module 3, and at the same time, the second power supply 2 with a higher voltage can also supply power to the BMS module 3, thereby realizing redundant power supply of the BMS module 3; and, since the BMS module 3 is arranged in the second power supply 2, and the step-down module 4 is arranged in the BMS module 3, the second power supply 2, the BMS module 3 and the step-down module 4 are efficiently integrated, thereby eliminating external wiring, which not only reduces the power supply cost of the BMS module 3, but also avoids the risks of poor contact, instantaneous disconnection, etc. As a result, the power supply system has a high robustness, which can ensure the efficient and stable operation of the BMS module 3, thereby meeting the use requirements of the vehicle.

[0090] It should be noted that the specific type of vehicle can be set according to actual needs and is not limited to this. For example, the vehicle can be an electric vehicle, a fuel vehicle, a hybrid vehicle, etc.

[0091] In the description of the present disclosure, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. In addition, in the description of the present disclosure, unless otherwise specified, "plurality" means two or more.

[0092] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present disclosure includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by those skilled in the art to which the embodiments of the present disclosure belong.

[0093] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0094] Although the embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and are not to be construed as limitations of the present disclosure. A person skilled in the art may change, modify, replace and vary the above embodiments within the scope of the present disclosure.

Claims

1. A power supply system, characterized in that: include: A first power source, a second power source, a battery management system BMS module, a voltage reduction module and a first switching module; The BMS module is arranged in the second power supply, the step-down module is arranged in the BMS module, the power supply end of the step-down module is connected to the power supply end of the second power supply, and the step-down module is used to reduce the output voltage of the second power supply to the output voltage of the first power supply; The first switching module is arranged in the BMS module, the first power supply end of the first switching module is connected to the power supply end of the first power supply, the second power supply end of the first switching module is connected to the power supply end of the step-down module, and the power supply end of the first switching module is connected to the power supply end of the BMS module.

2. The power supply system according to claim 1, characterized in that: The power supply system further comprises: a second switching module, wherein a first power supply terminal of the second switching module is connected to a power supply terminal of the first power supply, a second power supply terminal of the second switching module is connected to a power supply terminal of the step-down module, and a power supply terminal of the second switching module is respectively connected to a first power supply terminal of the first switching module and a power supply terminal of the load; Wherein, when the path between the first power supply terminal and the power supply terminal of the first switching module is connected, the path between the first power supply terminal and the power supply terminal of the second switching module is connected; When the path between the second power supply terminal and the power supply terminal of the first switching module is connected, the path between the second power supply terminal and the power supply terminal of the second switching module is connected.

3. The power supply system according to claim 2, characterized in that: The first power supply comprises: A DC-DC converter, wherein a power supply end of the DC-DC converter is connected to a power supply end of the second power supply, and the power supply end of the DC-DC converter is connected to a first power supply end of the second switching module.

4. The power supply system according to claim 3, characterized in that: The first power supply also includes: A first switch, wherein the first switch is arranged between the power supply end of the DC-DC converter and the power supply end of the second power supply, and an input end of the first switch is connected to an output end of the BMS module.

5. The power supply system according to claim 3, characterized in that: The first power supply also includes: A storage battery, wherein a power supply end of the storage battery is connected to the first power supply end of the second switching module.

6. The power supply system according to claim 2, characterized in that: The power supply system further comprises: A drive control module is provided in the BMS module and is connected in series between the power supply end of the step-down module and the power supply end of the second power supply, and an input end of the drive control module is connected to an output end of the BMS module.

7. The power supply system according to claim 6, characterized in that: The BMS module includes: A microcontroller MCU unit, wherein the input end of the MCU unit is connected to the output end of the domain controller in the load, and the output end of the MCU unit is connected to the input end of the drive control module, and the MCU unit is used to wake up the drive control module.

8. The power supply system according to claim 1, characterized in that: The step-down module comprises: A flyback transformer, wherein the flyback transformer is arranged in the BMS module, the power supply end of the flyback transformer is connected to the power supply end of the second power supply, the power supply end of the flyback transformer is connected to the second power supply end of the first switching module, and the flyback transformer is used to reduce the output voltage of the second power supply to the output voltage of the first power supply.

9. The power supply system according to claim 1, characterized in that: The power supply system further comprises: The second switch is arranged in the BMS module, and the second switch is connected in series between the second power supply terminal of the first switching module and the power supply terminal of the step-down module.

10. The power supply system according to claim 1, characterized in that: The second power supply comprises: A plurality of battery cells are connected in series and / or in parallel, and a power supply end of the step-down module is connected to power supply ends of the plurality of battery cells.

11. The power supply system according to claim 1, characterized in that: The output voltage of the first power supply is 12V.

12. A vehicle, characterized in that: include: A power supply system as claimed in any one of claims 1 to 11.

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