Power supply network structure applied to vehicle, and vehicle

Abstract

A power supply network structure applied to a vehicle, and a vehicle. The power supply network structure comprises a power source structure (10), a first boosting structure (20), a second boosting structure (30), and a distribution structure (40). The first boosting structure (20) comprises a first direct current-to-direct current (DC / DC) converter (21) and a supercapacitor (22) in parallel connection. The first DC / DC converter (21) is used for receiving a voltage at a first voltage value transmitted by the power source structure (10), converting the voltage at the first voltage value into a voltage at a second voltage value, and transmitting same to the second boosting structure (30). The supercapacitor (22) is used for transmitting the voltage at the second voltage value in the supercapacitor to the second boosting structure (30). The second boosting structure (30) is used for converting the voltage at the second voltage value into a voltage at a third voltage value, and transmitting same to the distribution structure (40). The distribution structure (40) is used for distributing the voltage at the third voltage value to electrical devices (50). This configuration serves to achieve the effect of stably supplying power to high-power electrical devices.

Description

Power supply network structure applied to vehicle and vehicle

[0001] The present application claims priority to the Chinese patent application No. 202411270370.7, filed on September 11, 2024, and entitled "Power supply network structure applied to vehicle and vehicle", the content of which is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0002] The present application relates to the field of vehicle power supply, in particular to a power supply network structure applied to vehicle and vehicle. BACKGROUND

[0003] In an electric vehicle, due to the requirements of vehicle electrification, intelligence and comfort, active stabilizer bars, steer-by-wire, air springs and other electrical devices are introduced into the electric vehicle. Since the added electrical devices have multiple high-power electrical devices, a power supply network for providing a fixed voltage value is needed to supply power to the above-mentioned high-power electrical devices, for example, the above-mentioned fixed voltage value is 48 volts.

[0004] In an alternative way, a large-capacity lithium battery and a direct current converter (Direct Current to Direct Current, DCDC) are used to form a power supply network, the large-capacity lithium battery is used as a power supply, and the voltage level is converted through the direct current converter to supply power to the high-power electrical devices.

[0005] However, the performance of lithium batteries will decrease significantly at low temperatures; and the high-power electrical devices have the problem of self-power generation during operation, which will cause the voltage of the power supply network to rise and cause damage to the power supply network; therefore, the power supply will be unstable, which will affect the operation of the electrical devices. SUMMARY

[0006] The present application provides a power supply network structure applied to vehicle and vehicle, which ensures the stability of the voltage of the power supply network structure, thereby improving the probability of normal operation of the electrical devices; and the supercapacitor can store the discharged electrical energy, thereby the supercapacitor supplies power to the electrical devices using the stored electrical energy, improving the use efficiency of electrical energy and achieving the effect of energy saving.

[0007] In a first aspect, the present application provides a power supply network structure applied to vehicle, comprising: a power supply structure, a first voltage boosting structure, a second voltage boosting structure, and a distribution structure; wherein the first voltage boosting structure comprises a first direct current to direct current DC / DC converter and a supercapacitor connected in parallel.

[0008] The power supply structure is connected with the first DC / DC converter, the first DC / DC converter and the super capacitor are respectively connected with one end of the second voltage boosting structure, the other end of the second voltage boosting structure is connected with the distribution structure, and the distribution structure is connected with the electrical device in the vehicle.

[0009] The first DC / DC converter is used for receiving the voltage of the first voltage value transmitted by the power supply structure, converting the voltage of the first voltage value into the voltage of the second voltage value, and transmitting the obtained voltage of the second voltage value to the second voltage boosting structure.

[0010] The super capacitor is used for transmitting the voltage of the second voltage value in the super capacitor to the second voltage boosting structure; wherein the second voltage value is greater than the first voltage value.

[0011] The second voltage boosting structure is used for converting the received voltage of the second voltage value into the voltage of the third voltage value, and transmitting the obtained voltage of the third voltage value to the distribution structure; wherein the third voltage value is greater than the second voltage value.

[0012] The distribution structure is used for distributing the received voltage of the third voltage value to the electrical device.

[0013] In this way, by adopting the first DC / DC converter and the super capacitor in parallel to form the first voltage boosting structure, and the second voltage boosting structure in series with the first voltage boosting structure, when the reverse electromotive force is generated in the electrical device, the second voltage boosting structure discharges to the super capacitor, which ensures the voltage stability of the power supply network structure, thereby improving the probability of normal operation of the electrical device; and the super capacitor can store the discharged electric energy, so that the super capacitor can supply power to the electrical device 50, thereby improving the use efficiency of electric energy and achieving the effect of energy saving.

[0014] In an embodiment according to the present application, the first voltage boosting structure further comprises an electronic fuse, one end of the electronic fuse is connected with the power supply structure, and the other end of the electronic fuse is connected with the first DC / DC converter.

[0015] The electronic fuse is used for being disconnected when detecting that the power supply network structure is abnormal.

[0016] In an embodiment according to the present application, the power supply network structure further comprises a micro control unit, a battery balancing and battery sampling module BSM, and an intelligent battery controller; wherein the micro control unit is connected with the super capacitor, the BSM, and the intelligent battery controller respectively; and the BSM is connected with the super capacitor.

[0017] The BSM is used for detecting the voltage value of the cell in the super capacitor, and transmitting the voltage value of the cell in the super capacitor to the intelligent battery controller through the micro control unit.

[0018] The intelligent battery controller is configured to determine a voltage balancing mode corresponding to the super capacitor according to the voltage values of the cells in the super capacitor, and generate a voltage balancing instruction according to the voltage balancing mode, and send the voltage balancing instruction to the micro control unit; wherein the voltage balancing mode represents a balancing mode of the voltage of the cells in the super capacitor; and the voltage balancing instruction is used to indicate the balancing mode of the voltage of the cells in the super capacitor.

[0019] The micro control unit is configured to execute the voltage balancing instruction for the super capacitor to balance the voltage of the cells in the super capacitor.

[0020] In an embodiment according to the present application, each cell in the super capacitor is connected with a first switch corresponding to the cell, and the first switch corresponding to each cell is connected with a resistance loop; the voltage balancing mode represents the first switch corresponding to the cell with the closed voltage value greater than the first preset voltage threshold; and the voltage balancing instruction represents the first switch corresponding to the cell with the closed voltage value greater than the first preset voltage threshold.

[0021] The intelligent battery controller is specifically configured to determine the cell with the voltage value greater than the first preset voltage threshold according to the voltage values of the cells in the super capacitor, and generate a voltage balancing instruction, and send the voltage balancing instruction to the micro control unit.

[0022] In an embodiment according to the present application, each cell in the super capacitor is connected with a second switch corresponding to the cell, and the second switch corresponding to each cell is connected with a second DC / DC converter; and the voltage balancing instruction represents the second switch corresponding to the cell with the closed voltage value greater than the second preset voltage threshold and the second switch corresponding to the cell with the closed voltage value less than the third preset voltage threshold.

[0023] The intelligent battery controller is specifically configured to determine the cell with the voltage value greater than the second preset voltage threshold and the cell with the voltage value less than the third preset voltage threshold according to the voltage values of the cells in the super capacitor; wherein the second preset voltage threshold is greater than the third preset voltage threshold; and generate a voltage balancing instruction according to the cell with the voltage value greater than the second preset voltage threshold and the cell with the voltage value less than the third preset voltage threshold, and send the voltage balancing instruction to the micro control unit.

[0024] In this way, the intelligent battery controller generates and sends the voltage balancing instruction according to the energy supply cell and the energy receiving cell; the micro control unit controls the second switch corresponding to the energy supply cell and the energy receiving cell to switch to the closed state according to the voltage balancing instruction, activates the second DC / DC converter, and controls the second DC / DC converter to switch to the step-down mode; and the energy of the energy supply cell will be delivered to the energy receiving cell, so as to realize the voltage balancing between each cell.

[0025] In an embodiment according to the application, the power supply structure comprises a power battery in the vehicle, a high-voltage DC / DC converter, and a preset battery; the preset battery is a battery with a first voltage value; the power battery is connected to one end of the high-voltage DC / DC converter, and the other end of the high-voltage DC / DC converter and the preset battery are both connected to the first voltage boosting structure.

[0026] The high-voltage DC / DC converter is configured to convert the voltage transmitted by the power battery into a voltage with the first voltage value, and transmit the obtained voltage with the first voltage value to the first voltage boosting structure.

[0027] The preset battery is configured to transmit the voltage with the first voltage value in the preset battery to the first voltage boosting structure.

[0028] In this way, by adopting the combined power supply of the high-voltage DC / DC converter and the preset battery, the power supply can be more stable. After the high-voltage DC / DC converter converts the voltage of the power battery into a voltage with the first voltage value, the power supply device is powered, the power of the power battery is sufficient, and the power of the high-voltage DC / DC converter is sufficient (usually several kilowatts), so that the demand for stable power supply to the power supply device can be met, thereby reducing the voltage fluctuation in the power supply network structure; that is, avoiding the voltage fluctuation in the power supply network structure caused by insufficient power of the preset battery.

[0029] In an embodiment according to the application, the power supply structure is further configured to transmit the voltage with the first voltage value to the first DC / DC converter to charge the super capacitor when the second voltage boosting structure is in an off state.

[0030] The first DC / DC converter is further configured to switch to a voltage boosting mode to output a voltage with a second voltage value to continue charging the super capacitor when it is determined that the first DC / DC converter is in a working state with the first voltage value.

[0031] In an embodiment according to the application, the second voltage boosting structure is a third DC / DC converter.

[0032] The third DC / DC converter is configured to control the third DC / DC converter to enter a voltage reducing mode to charge the super capacitor when it is detected that the time length during which the voltage value of the third DC / DC converter is greater than or equal to a fourth preset voltage threshold value exceeds a first preset time length.

[0033] The third DC / DC converter is further configured to control the third DC / DC converter to enter a voltage boosting mode when it is detected that the time length during which the voltage value of the third DC / DC converter is less than or equal to a fifth preset voltage threshold value exceeds the first preset time length.

[0034] In an embodiment according to the application, the first DC / DC converter is further configured to, during the process that the second voltage boosting structure charges the super capacitor, if it is detected that the voltage value of the first DC / DC converter is greater than or equal to the sixth preset voltage threshold for a time period longer than the second preset time period, control the first DC / DC converter to enter the voltage step-down mode to charge the preset battery in the power supply network structure.

[0035] The first DC / DC converter is further configured to, if it is detected that the voltage value of the first DC / DC converter is less than or equal to the seventh preset voltage threshold for a time period longer than the second preset time period, control the first DC / DC converter to enter the voltage step-up mode.

[0036] In this way, by adopting the two-stage voltage boosting structure mode of the first voltage boosting structure and the second voltage boosting structure, the working voltage of the super capacitor is reduced, and thus the pre-charging time of the power supply network structure can be shortened. It can be seen that the power supply network structure provided by the application can significantly reduce the pre-charging time, so that the voltage of the power supply network structure quickly reaches the working voltage, and the electrical device can quickly work, thereby quickly responding to the needs of the user and improving the user experience.

[0037] In an embodiment according to the application, the super capacitor includes 10 battery cells.

[0038] In a second aspect, the embodiments of the application provide a vehicle, and the vehicle is provided with the power supply network structure according to any one of the first aspect.

[0039] The power supply network structure applied to the vehicle and the vehicle provided by the embodiments of the application can improve the probability of normal working of the electrical device by adopting the first DC / DC converter and the super capacitor in parallel to form the first voltage boosting structure, and the second voltage boosting structure in series with the first voltage boosting structure, and the second voltage boosting structure discharges the super capacitor when the electrical device generates a reverse electromotive force, thereby ensuring the stability of the voltage of the power supply network structure; and the super capacitor can store the discharged electrical energy, so that the super capacitor supplies power to the electrical device by using the stored electrical energy, thereby improving the use efficiency of the electrical energy and achieving the effect of saving energy.

[0040] In addition, by adopting the series connection of the first voltage boosting structure and the second voltage boosting structure and sequentially increasing the voltage, the voltage of the first voltage boosting structure can be reduced, that is, the voltage of the super capacitor can be reduced; and the number of battery cells in the super capacitor can be reduced, thereby reducing the weight of the super capacitor, which can not only meet the demand of lightweight vehicle body, but also reduce the cost.

[0041] Furthermore, due to the characteristics of the super capacitor itself, there is no problem of significant performance decline of the lithium battery at low temperature, so that the stable power supply of the power supply network structure can be ensured; and the super capacitor can cover the whole vehicle life, compared with the lithium battery, there is no need to consider the design of the replacement of the super capacitor, which saves the cost. BRIEF DESCRIPTION OF DRAWINGS

[0042] The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate embodiments consistent with the present application and, together with the description, further serve to explain the principles of the application.

[0043] Fig. 1 is a structural schematic diagram of a power supply network structure applied to a vehicle according to the present application;

[0044] Fig. 2 is a structural schematic diagram of another power supply network structure applied to a vehicle according to the present application;

[0045] Fig. 3 is a structural schematic diagram of a super capacitor according to the present application;

[0046] Fig. 4 is a connection schematic diagram of the super capacitor and a first switch according to the present application;

[0047] Fig. 5 is a connection schematic diagram of the super capacitor and a second switch according to the present application.

[0048] Reference signs: 10: power supply structure; 11: power battery; 12: high-voltage DC / DC converter; 13: preset battery; 20: first voltage-boosting structure; 21: first DC / DC converter; 22: super capacitor; 221: cell; 30: second voltage-boosting structure; 31: third DC / DC converter; 40: distribution structure; 50: electrical device; 60: micro control unit; 70: battery balancing and battery sampling module BSM; 80: intelligent battery controller; 90: first switch; 91: second switch; 92: second DC / DC converter.

[0049] Through the above drawings, the specific embodiments of the present application have been shown, and will be described in more detail hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application by any means, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0050] The exemplary embodiments will be described in detail herein with reference to the accompanying drawings. In the following description, like reference numerals refer to like elements throughout the description. The following exemplary embodiments described herein represent illustrations only of aspects in which the present application can be embodied and do not represent an exhaustive list of all aspects in which the present application can be embodied. Indeed, the exemplary embodiments presented herein are intended to cover all aspects of the present application, and any Patents that issue on claims depending from this application will cover all aspects of the present application. Accordingly, but not by way of limitation, exemplary embodiments of the present application are described in the detailed description which follows.

[0051] The terms "comprises", "comprising", "includes", "including" and the like are open-ended terms, i.e., "comprising but not limited to", meaning that other elements can be included. The term "based on" means "based, at least in part, on". The term "one embodiment" means "at least one embodiment"; the term "another embodiment" means "at least one additional embodiment"; and so on.

[0052] Due to the requirements of vehicle electrification, intelligence and comfort, etc., active stabilizer bars, steer-by-wire, air springs and other electrical devices are introduced in electric vehicles at present.

[0053] An active stabilizer bar is a device that uses an electric motor or a hydraulic system to dynamically adjust the roll stiffness of a vehicle. It is usually installed in the suspension system of a vehicle and can reduce the roll of the vehicle and improve the stability and comfort of the vehicle when the vehicle turns or encounters uneven road surfaces through electronic signal control.

[0054] Steer-by-wire is a steering system that uses electronic signals to control the steering angle of the wheels. Sensors installed in the vehicle detect the steering operation of the driver, convert the driver's steering operation into electrical signals, and transmit the electrical signals to the steering actuator. The actuator controls the steering angle of the wheels according to the electrical signals, which can reduce the force required by the driver to steer the vehicle.

[0055] An air spring is a suspension system that uses air pressure to support a vehicle. By adjusting the height and stiffness of the vehicle through inflation and deflation, it provides a more stable ride experience and improves the handling of the vehicle.

[0056] The various electrical devices described above are high-power electrical devices, and therefore require voltage supply of specific voltage values, such as 48V voltage. This requires the establishment of a 48V power supply network to supply power to the various high-power electrical devices described above.

[0057] In one example, a large-capacity 48V lithium battery and a direct current to direct current (DC / DC) converter are used to form a power supply network to supply power to high-power electrical devices; wherein the large-capacity 48V lithium battery is used as a power supply, and the DC / DC converter can convert the voltage level.

[0058] However, the power supply network has the following defects: first, due to the charging and discharging principle of the lithium battery, its performance will obviously decrease at low temperature, which will cause the instability of power supply; second, various high-power electrical devices will generate induced electromotive force (also known as reverse electromotive force) under external excitation, which will cause the voltage in the power supply network to rise, thereby damaging the power supply network and affecting the stability of power supply and the normal work of electrical devices; third, since the service life of the lithium battery is shorter than that of the whole vehicle, the replacement of the lithium battery is involved in the service life of the whole vehicle, thereby the design for replacing the lithium battery is needed, which will bring additional economic cost.

[0059] In one example, a 48V supercapacitor (Sup-cap) and a DC / DC converter are used to form a power supply network to supply power to high-power electrical devices; wherein the 48V supercapacitor is a new type of energy storage device, which has higher energy density than traditional capacitors, and faster charging and discharging rate than batteries, and is used as a power supply here, and the DC / DC converter can convert the voltage level.

[0060] However, the power supply network has the following defects: the 48V supercapacitor needs 20 battery cells in series, which results in higher cost, volume and weight of the 48V supercapacitor, which is not conducive to the lightweight and cost reduction and energy saving requirements of the vehicle.

[0061] The power supply network structure for vehicles provided by the present application aims to solve the above technical problems of the prior art.

[0062] The technical solutions of the present application and how the technical solutions of the present application solve the above technical problems will be described in detail below with specific examples. The following specific examples can be combined with each other, and the same or similar concepts or processes may not be described again in some examples. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0063] Fig. 1 is a structural schematic diagram of a power supply network structure for vehicles provided by the present application, as shown in Fig. 1, the power supply network structure includes a power supply structure 10, a first voltage boosting structure 20, a second voltage boosting structure 30, and a distribution structure 40; wherein the first voltage boosting structure 20 includes a first DC / DC converter (first DC / DC converter 21) and a supercapacitor 22 in parallel.

[0064] The power supply structure 10 is connected with the first DC / DC converter 21, the first DC / DC converter 21 and the super capacitor 22 are respectively connected with one end of the second voltage boosting structure 30, the other end of the second voltage boosting structure 30 is connected with the distribution structure 40, and the distribution structure 40 is connected with the electrical device 50 in the vehicle.

[0065] The first DC / DC converter 21 is used for receiving the voltage of the first voltage value transmitted by the power supply structure 10 and converting the voltage of the first voltage value into the voltage of the second voltage value, and transmitting the obtained voltage of the second voltage value to the second voltage boosting structure 30.

[0066] The super capacitor 22 is used for transmitting the voltage of the second voltage value in the super capacitor 22 to the second voltage boosting structure 30; wherein the second voltage value is greater than the first voltage value.

[0067] The second voltage boosting structure 30 is used for converting the received voltage of the second voltage value into the voltage of the third voltage value and transmitting the obtained voltage of the third voltage value to the distribution structure 40; wherein the third voltage value is greater than the second voltage value.

[0068] The distribution structure 40 is used for distributing the received voltage of the third voltage value to the electrical device 50.

[0069] Exemplarily, the power supply network structure comprises the power supply structure 10, the first voltage boosting structure 20, the second voltage boosting structure 30, and the distribution structure 40; wherein the first voltage boosting structure 20 comprises the first DC / DC converter 21 and the super capacitor 22, and the first DC / DC converter 21 and the super capacitor 22 are connected in parallel.

[0070] The connection relationship between each component in the power supply network structure is described as follows. Referring to FIG. 1, in the direction from left to right, one end of the power supply structure 10 is connected with one end of the first voltage boosting structure 20, specifically, one end of the power supply structure 10 is connected with one end of the first DC / DC converter 21 of the first voltage boosting structure 20; the other end of the first DC / DC converter 21 and the super capacitor 22 is connected with one end of the second voltage boosting structure 30, the other end of the second voltage boosting structure 30 is connected with one end of the distribution structure 40, and the other end of the distribution structure 40 is connected with one or more electrical devices 50.

[0071] The power supply structure 10 outputs the voltage of the first voltage value to the first voltage boosting structure 20, for example, the first voltage value is 12 volts (V); the first voltage boosting structure 20 receives the voltage of the first voltage value output by the power supply structure 10, the first DC / DC converter 21 starts the boost mode, and converts the voltage of the first voltage value into the voltage of the second voltage value; wherein the second voltage value is greater than the first voltage value, for example, the second voltage value is 30 V.

[0072] The first DC / DC converter 21 transmits the voltage of the second voltage value to the second voltage-boosting structure 30; the second voltage-boosting structure 30 converts the voltage of the second voltage value into the voltage of the third voltage value and transmits it to the distribution structure 40; wherein the third voltage value is greater than the second voltage value, for example, the third voltage value is 48V.

[0073] The distribution structure 40 distributes the voltage of the third voltage value to each electrical device 50 to realize the power supply to each electrical device 50; wherein the distribution structure 40 can be a smart power distribution unit (PDU), and the smart PDU includes one or more power distribution structures, one end of each power distribution structure is respectively connected to one end of the second voltage-boosting structure 30, and the other end of each power distribution structure is respectively connected to each electrical device 50.

[0074] Compared with the traditional PDU, the smart PDU has higher integration, can share one housing with the first DC / DC converter 21, the super capacitor 22 and the second voltage-boosting structure 30, thereby saving the layout space in the vehicle, and can use the above-mentioned shared housing to dissipate heat of the first DC / DC converter 21 and the second voltage-boosting structure 30, ensuring the normal work of the power supply network structure; in addition, the smart PDU can also perform real-time energy monitoring and diagnosis, facilitating the statistics of electric energy and troubleshooting.

[0075] In the process of the power supply network structure supplying power to the electrical device 50, if one or more electrical devices 50 generate a reverse electromotive force due to external excitation, the second voltage-boosting structure 30 starts the buck mode and discharges to the super capacitor 22. The super capacitor 22 receives the discharged pressure from the second voltage-boosting structure 30 and can store the discharged pressure (essentially electric energy), thereby ensuring that the voltage of the entire power supply network structure remains stable, reducing voltage fluctuations, and further ensuring stable power supply of the power supply network structure to each electrical device 50.

[0076] In addition, the super capacitor 22 and the first DC / DC converter 21 are connected in parallel to constitute the first voltage-boosting structure 20, and the voltage of the first voltage-boosting structure 20 is the second voltage value; the first voltage-boosting structure 20 and the second voltage-boosting structure 30 are connected in series, and the voltage of the second voltage-boosting structure 30 is the third voltage value.

[0077] In the case that the second voltage value is 30V and the third voltage value is 48V, the voltage of the super capacitor 22 is also 30V; compared with directly adopting a 48V super capacitor and a DC / DC converter in series to form a power supply network, the number of the cells included in the super capacitor 22 with a working voltage of 30V is smaller, for example, the number of the cells included in the super capacitor 22 with a working voltage of 30V is 10; it has been described above that the 48V super capacitor needs 20 cells, therefore, by adopting the two-stage boosting mode of the first boosting structure 20 and the second boosting structure 30, the working voltage of the super capacitor 22 can be reduced, and the number of the cells included in the super capacitor 22 can be reduced, so that the weight of the vehicle can be reduced, the demand of lightweight vehicle body can be met, and the cost is reduced.

[0078] The power supply network structure applied to the vehicle provided by the embodiment of the application can ensure the voltage stability of the power supply network structure by adopting the first DC / DC converter 21 and the super capacitor 22 in parallel to form the first boosting structure 20, and adopting the second boosting structure 30 in series with the first boosting structure 20, so that the second boosting structure 30 can discharge the super capacitor 22 when the electric device 50 generates a reverse electromotive force, thereby improving the probability of the normal operation of the electric device; and the super capacitor 22 can store the discharged electric energy, so that the super capacitor 22 can supply power to the electric device 50, thereby improving the use efficiency of the electric energy and achieving the effect of energy saving.

[0079] In addition, by adopting the first boosting structure 20 and the second boosting structure 30 in series and sequentially increasing the voltage, the voltage of the first boosting structure 20 can be reduced, that is, the voltage of the super capacitor 22 can be reduced, thereby reducing the number of the cells in the super capacitor 22, reducing the weight of the super capacitor 22, meeting the demand of lightweight vehicle body, and reducing the cost.

[0080] Furthermore, due to the characteristics of the super capacitor 22, there is no problem of significant performance reduction of the lithium battery at low temperature, so that the stable power supply of the power supply network structure can be ensured.

[0081] Fig. 2 is a structure schematic diagram of another power supply network structure applied to a vehicle provided by the application, as shown in Fig. 2, the embodiment describes the power supply network structure applied to the vehicle in detail on the basis of the embodiment of Fig. 1, the power supply network structure includes the power supply structure 10, the first boosting structure 20, the second boosting structure 30, and the distribution structure 40; wherein the first boosting structure 20 includes the first DC / DC converter (the first DC / DC converter 21) and the super capacitor 22 in parallel.

[0082] The power supply structure 10 is connected with the first DC / DC converter 21, the first DC / DC converter 21 and the super capacitor 22 are respectively connected with one end of the second voltage boosting structure 30, the other end of the second voltage boosting structure 30 is connected with the distribution structure 40, and the distribution structure 40 is connected with the electrical device 50 in the vehicle.

[0083] The first DC / DC converter 21 is used for receiving the voltage of the first voltage value transmitted by the power supply structure 10, converting the voltage of the first voltage value into the voltage of the second voltage value, and transmitting the obtained voltage of the second voltage value to the second voltage boosting structure 30.

[0084] The super capacitor 22 is used for transmitting the voltage of the second voltage value in the super capacitor 22 to the second voltage boosting structure 30; wherein the second voltage value is greater than the first voltage value.

[0085] The second voltage boosting structure 30 is used for converting the received voltage of the second voltage value into the voltage of the third voltage value, and transmitting the obtained voltage of the third voltage value to the distribution structure 40; wherein the third voltage value is greater than the second voltage value.

[0086] The distribution structure 40 is used for distributing the received voltage of the third voltage value to the electrical device 50.

[0087] In an embodiment according to the present application, the first voltage boosting structure 20 further comprises an electronic fuse, one end of the electronic fuse is connected with the power supply structure 10, and the other end of the electronic fuse is connected with the first DC / DC converter 21.

[0088] The electronic fuse is used for being disconnected when detecting that the power supply network structure is abnormal.

[0089] In an embodiment according to the present application, the power supply network structure further comprises a micro control unit 60, a battery sampling and balancing module BSM 70, and an intelligent battery controller 80; wherein the micro control unit 60 is respectively connected with the super capacitor 22, the BSM 70, and the intelligent battery controller 80; and the BSM 70 is connected with the super capacitor 22.

[0090] The BSM 70 is used for detecting the voltage value of the electric core 221 in the super capacitor 22, and transmitting the voltage value of the electric core 221 in the super capacitor 22 to the intelligent battery controller 80 through the micro control unit 60.

[0091] The intelligent battery controller 80 is configured to determine a voltage balancing mode corresponding to the super capacitor 22 according to the voltage values of the cells 221 in the super capacitor 22, and generate a voltage balancing instruction according to the voltage balancing mode, and send the voltage balancing instruction to the micro control unit 60; the voltage balancing mode represents a balancing mode of the voltage of the cells 221 in the super capacitor 22; and the voltage balancing instruction is used to indicate the balancing mode of the voltage of the cells 221 in the super capacitor 22.

[0092] The micro control unit 60 is configured to execute the voltage balancing instruction on the super capacitor 22 to balance the voltage of the cells 221 in the super capacitor 22.

[0093] In an embodiment of the present application, each cell 221 in the super capacitor 22 is connected with a first switch 90 corresponding to the cell 221, and the first switch 90 corresponding to each cell 221 is connected with a resistor circuit; the voltage balancing mode represents the first switch 90 corresponding to the cell 221 with a closed voltage value greater than a first preset voltage threshold; and the voltage balancing instruction represents the first switch 90 corresponding to the cell 221 with a closed voltage value greater than the first preset voltage threshold.

[0094] The intelligent battery controller 80 is specifically configured to determine the cell 221 with a voltage value greater than the first preset voltage threshold according to the voltage values of the cells 221 in the super capacitor 22, and generate a voltage balancing instruction, and send the voltage balancing instruction to the micro control unit 60.

[0095] In an embodiment of the present application, each cell 221 in the super capacitor is connected with a second switch 91 corresponding to the cell 221, and the second switch 91 corresponding to each cell 221 is connected with a second DC / DC converter 92; and the voltage balancing instruction represents the second switch 91 corresponding to the cell 221 with a closed voltage value greater than a second preset voltage threshold and the second switch 91 corresponding to the cell 221 with a closed voltage value less than a third preset voltage threshold.

[0096] The intelligent battery controller 80 is specifically configured to determine the cell 221 with a voltage value greater than the second preset voltage threshold and the cell 221 with a voltage value less than the third preset voltage threshold according to the voltage values of the cells 221 in the super capacitor 22; the second preset voltage threshold is greater than the third preset voltage threshold; and generate a voltage balancing instruction according to the cell 221 with the voltage value greater than the second preset voltage threshold and the cell 221 with the voltage value less than the third preset voltage threshold, and send the voltage balancing instruction to the micro control unit 60.

[0097] In an embodiment according to the application, the power supply structure 10 comprises a power battery 11 in the vehicle, a high-voltage DC / DC converter 12, and a preset battery 13; the preset battery 13 is a battery of a first voltage value; the power battery 11 is connected to one end of the high-voltage DC / DC converter 12, and the other end of the high-voltage DC / DC converter 12 and the preset battery 13 are both connected to the first voltage boosting structure 20.

[0098] The high-voltage DC / DC converter 12 is configured to convert the voltage transmitted by the power battery 11 into a voltage of the first voltage value, and transmit the obtained voltage of the first voltage value to the first voltage boosting structure 20.

[0099] The preset battery 13 is configured to transmit the voltage of the first voltage value in the preset battery 13 to the first voltage boosting structure 20.

[0100] In an embodiment according to the application, the power supply structure 10 is further configured to transmit the voltage of the first voltage value to the first DC / DC converter 21 to charge the super capacitor 22 when the second voltage boosting structure 30 is in an off state.

[0101] The first DC / DC converter 21 is further configured to switch to a voltage boosting mode to output a voltage of a second voltage value to continue charging the super capacitor 22 when it is determined that the first DC / DC converter 21 is in a working state of the first voltage value.

[0102] In an embodiment according to the application, the second voltage boosting structure 30 is a third DC / DC converter 31.

[0103] The third DC / DC converter 31 is configured to control the third DC / DC converter 31 to enter a voltage reducing mode to charge the super capacitor 22 when it is detected that a time length during which the voltage value of the third DC / DC converter 31 is greater than or equal to a fourth preset voltage threshold value exceeds a first preset time length.

[0104] The third DC / DC converter 31 is further configured to control the third DC / DC converter 31 to enter a voltage boosting mode when it is detected that a time length during which the voltage value of the third DC / DC converter 31 is less than or equal to a fifth preset voltage threshold value exceeds the first preset time length.

[0105] In an embodiment according to the application, the first DC / DC converter 21 is further configured to control the first DC / DC converter 21 to enter a voltage reducing mode to charge the preset battery 13 in the power supply structure 10 when it is detected that a time length during which the voltage value of the first DC / DC converter 21 is greater than or equal to a sixth preset voltage threshold value exceeds a second preset time length during the charging of the super capacitor 22 by the second voltage boosting structure 30.

[0106] The first DC / DC converter 21 is also configured to control the first DC / DC converter 21 to enter the boost mode if it is detected that the voltage value of the first DC / DC converter 21 is less than or equal to the seventh preset voltage threshold for more than the second preset time length.

[0107] In an embodiment according to the present application, the super capacitor 22 includes 10 battery cells 221.

[0108] For example, referring to FIG. 2, the power supply structure 10 includes a power battery 11, a high-voltage DC / DC converter 12, and a preset battery 13. The power battery 11 is arranged in a vehicle, and the voltage of the power battery 11 is 400V or 800V. One end of the high-voltage DC / DC converter 12 is connected to the power battery 11 to convert the voltage of 400V or 800V of the power battery 11 into a first voltage value of the power supply structure 10, for example, 12V. The other end of the high-voltage DC / DC converter 12 is connected to one end of the preset battery 13, and the other end of the preset battery 13 is connected to the first boost structure 20 to output the voltage of the first voltage value to the first boost structure 20. The preset battery 13 can be a lithium battery with a voltage of the first voltage value.

[0109] Compared with the power supply to the electrical device 50 by only using the preset battery 13, the power supply in the embodiment by using the high-voltage DC / DC converter 12 and the preset battery 13 in combination can make the power supply more stable. This is because, after the high-voltage DC / DC converter 12 converts the voltage of the power battery 11 into the voltage of the first voltage value, the power battery 11 has sufficient electric energy, and the power of the high-voltage DC / DC converter 12 is sufficient (usually several kilowatts), so that the demand for stable power supply to the electrical device 50 can be met, thereby reducing the voltage fluctuation in the power supply network structure; that is, avoiding the voltage fluctuation in the power supply network structure caused by insufficient power of the preset battery 13.

[0110] Referring to FIGS. 2 and 3 (only part of the battery cells 221 is shown in FIG. 3, which does not represent a limitation on the number of the battery cells 221), the power supply network structure further includes a microcontroller unit (MCU) 60, a balancing & sample module (BSM) 70, and a smart battery controller (SBC) 80. The BSM 70 is connected to the super capacitor 22, and the microcontroller unit 60 is connected to the smart battery controller 80, the BSM 70, and the super capacitor 22, respectively.

[0111] The BSM 70 collects the voltage value of each cell 221 in the supercapacitor 22, and transmits the collected voltage value of each cell 221 to the micro control unit 60, which then transmits the voltage value of each cell 221 to the intelligent battery controller 80.

[0112] The intelligent battery controller 80 determines the voltage balancing mode according to the voltage value of each cell 221, and generates and transmits the voltage balancing instruction corresponding to the voltage balancing mode to the micro control unit 60 according to different voltage balancing modes. This is because there are small differences between the cells 221 during manufacturing and other processes, which causes the voltage between each cell 221 to be different, thereby affecting the operation of the supercapacitor 22. Therefore, it is necessary to control the voltage between each cell 221 to be balanced.

[0113] The micro control unit 60 controls the voltage between the cells 221 in the supercapacitor 22 to be balanced according to the received voltage balancing instruction.

[0114] The following describes two voltage balancing modes.

[0115] The first voltage balancing mode is to consume the excess energy in the cell 221 through resistance. Please refer to FIG. 4 (FIG. 4 only shows part of the cells 221 and the first switch 90, which does not represent a limitation on the number of cells 221 and first switches 90), in which case each cell 221 in the supercapacitor 22 is connected to a corresponding first switch 90 and a resistance circuit; the resistance circuit includes a plurality of resistors, and the first switch 90 includes two states of being open and closed.

[0116] The intelligent battery controller 80 determines the cell 221 with a voltage value greater than the first preset voltage threshold according to the voltage value of each cell 221, generates and sends a voltage balancing instruction indicating the cell 221 with a voltage value greater than the first preset voltage threshold, and the micro control unit 60 controls the corresponding first switch 90 of the cell 221 with a voltage value greater than the first preset voltage threshold to switch to the closed state according to the received voltage balancing instruction.

[0117] As a result, the cell 221 with a voltage value greater than the first preset voltage threshold is connected to the resistance circuit, and a current is generated between the cell 221 with a voltage value greater than the first preset voltage threshold and the resistance circuit. According to Joule's law, part of the voltage of the cell 221 with a voltage value greater than the first preset voltage threshold is dissipated in the form of heat energy.

[0118] In this process, the BSM 70 still continuously monitors the voltage value of each cell 221 in the supercapacitor 22 and transmits to the intelligent battery controller 80; if the intelligent battery controller 80 determines that the voltage value of each cell 221 reaches the target voltage value, the intelligent battery controller 80 sends a command to stop the voltage balance control to the micro control unit 60; the micro control unit 60 in turn controls each first switch 90 to switch to the open state. The target voltage value can be the average voltage value of each cell 221 in the initial state (before voltage balance), or it can be the median of the voltage value of each cell 221 in the initial state.

[0119] The second voltage balance mode: the power of the power cell is delivered to the energy cell. Please refer to Figure 5 (only part of the cell 221 and the second switch 91 are shown in Figure 5, which does not represent the limitation of the number of cells 221 and second switches 91), in this case, each cell 221 in the supercapacitor 22 is connected with the corresponding second switch 91, each second switch 91 is connected with the second DC / DC converter 92, and the second switch 91 includes two states of opening and closing.

[0120] The intelligent battery controller 80 determines the cell 221 with a voltage value greater than the second preset voltage threshold (i.e. the power cell) and the cell 221 with a voltage value less than the third preset voltage threshold (i.e. the energy cell) according to the voltage value of each cell 221 transmitted by the BSM 70; wherein the second preset voltage threshold and the third preset voltage threshold can be determined according to the working voltage range of the supercapacitor 22 and the temperature range of the cell 221, etc. The second preset voltage threshold is greater than the third preset voltage threshold.

[0121] The intelligent battery controller 80 generates and transmits a voltage balance instruction according to the power cell and the energy cell; the micro control unit 60 controls the second switch 91 corresponding to the power cell and the energy cell to switch to the closed state according to the voltage balance instruction, activates the second DC / DC converter 92, and controls the second DC / DC converter 92 to switch to the step-down mode; then the power of the power cell will be delivered to the energy cell, that is, the voltage balance between each cell 221 can be realized.

[0122] In this process, the BSM 70 still continuously monitors the voltage value of each cell 221 in the super capacitor 22 and sends to the intelligent battery controller 80; if the intelligent battery controller 80 determines that the voltage value of each cell 221 reaches the control voltage value, the intelligent battery controller 80 sends a command to stop the voltage balance control to the micro control unit 60; the micro control unit 60 in turn controls each second switch 90 to switch to the open state, and controls the second DC / DC converter 92 to be closed. The control voltage value can be determined according to the second preset voltage threshold and the third preset voltage threshold, and the safe working voltage range of the cell 221.

[0123] The power supply network structure provided by the embodiments of the present application also involves pre-charging of electric energy before supplying power to the electrical device 50. This is because the voltage in the power supply network structure will be very low, even 0V, in the case of initial (i.e., the power supply structure 10 is started for the first time) or long-time parking (long-time without charging). In order to avoid damage to the super capacitor 22, the first DC / DC converter 21 and the second boost structure 30 caused by current mutation, pre-charging is required when the vehicle is powered on; the second boost structure 30 can be a third DC / DC converter 31. The process of pre-charging is described in detail below.

[0124] The process of pre-charging is divided into two stages. The first stage of pre-charging is to make the voltage of the first boost structure reach a first voltage value, for example, 12V; the second stage of pre-charging is to make the voltage of the first boost structure reach a second voltage value, for example, 30V.

[0125] Please refer to Fig. 2 again. In the first stage of pre-charging, the second boost structure 30 is in the off state, and the power supply structure 10 delivers a voltage of the first voltage value to the first DC / DC converter 21 to make the voltage of the super capacitor 22 reach the first voltage value. In this process, the voltage of the super capacitor 22 can be gradually increased by limiting the charging current to a constant value, so as to avoid damage to the super capacitor 22. The first DC / DC converter 21 can control the charging current to a constant current by controlling the duty cycle of pulse width modulation (PMW) to a constant value.

[0126] When the first DC / DC converter 21 detects that the voltage of the super capacitor 22 reaches the first voltage value, it enters the second stage of pre-charging; the first DC / DC converter 21 switches to the boost mode; thus, the charging current to the super capacitor 22 gradually increases, so that the super capacitor 22 gradually reaches the voltage of the second voltage value.

[0127] When the voltage of the super capacitor 22 reaches the second voltage value, the third DC / DC converter 31 switches to the step-up mode, so that the voltage of the second step-up structure 30 reaches the third voltage value, and then the power distribution structure 40 supplies power to the power-consuming device 50.

[0128] In the power supply network structure provided in the embodiments of the present application, the two-stage step-up structure mode of the first step-up structure 20 and the second step-up structure 30 is adopted, so that the working voltage of the super capacitor 22 is reduced, and the pre-charging time of the power supply network structure is shortened. For example, when the charging current of the DC / DC converter is 10 Ampere (A), the capacitance of the electric core is 330 Farad (F), and the minimum working voltage of the 48V super capacitor is 36V, the pre-charging time of the super capacitor to 36V is 59.4S; in the embodiments of the present application, the working voltage of the super capacitor 22 is 30V, and the pre-charging time of the super capacitor to 30V is 36.3S under the same charging current and electric core, and the time of the second step-up structure 30 to step up to 36V is 0.2S; thus, it can be seen that the power supply network structure provided in the embodiments of the present application can significantly shorten the pre-charging time, so that the voltage of the power supply network structure reaches the working voltage quickly, and the power-consuming device 50 can work quickly, thereby quickly responding to the needs of the user and improving the user experience.

[0129] The power supply network structure provided in the embodiments of the present application also provides a set of energy feedback logic for coping with the reverse electromotive force generated by the power-consuming device 50.

[0130] When the third DC / DC converter 31 detects that the voltage value is greater than or equal to the fourth preset voltage threshold value, and the time length during which the voltage value is greater than or equal to the fourth preset voltage threshold value exceeds the first preset time length, the third DC / DC converter 31 switches to the step-down mode and charges the super capacitor 22; the super capacitor 22 receives the pressure relief from the third DC / DC converter 31 and stores energy. The fourth preset voltage threshold value can be 52V, and the first preset time length can be 500 milliseconds.

[0131] In the process of the super capacitor 22 continuously receiving the pressure relief from the third DC / DC converter 31 and storing energy, the voltage of the super capacitor 22 gradually rises; however, the energy storage of the super capacitor 22 has an upper limit. Therefore, when it is detected that the voltage of the super capacitor 22 is greater than or equal to the sixth preset voltage threshold value, and the time length during which the voltage is greater than or equal to the sixth preset voltage threshold value exceeds the second preset time length, the first DC / DC converter 21 switches to the step-down mode, so that the super capacitor 22 discharges to the preset battery 13. The sixth preset voltage threshold value can be 28V, and the first preset time length can be 500 milliseconds.

[0132] Of course, in order to guarantee the normal power supply of the power supply network structure, the voltage value of the third DC / DC converter 31 cannot be too low. When the third DC / DC converter 31 detects that the voltage value is less than or equal to a fifth preset voltage threshold value, and the time length during which the voltage value is less than or equal to the fifth preset voltage threshold value exceeds a first preset time length, the third DC / DC converter 31 switches to the boost mode to supply power to the electrical device 50. The fifth preset voltage threshold value can be 44V.

[0133] Similarly, in order to guarantee the normal work of the super capacitor 22, when it is detected that the voltage value of the first DC / DC converter 21 is less than or equal to a seventh preset voltage threshold value, and the time length during which the voltage value is less than or equal to the seventh preset voltage threshold value exceeds a second preset time length, the first DC / DC converter 21 enters the boost mode and delivers power to the second boost structure 30.

[0134] The power supply network structure applied to the vehicle provided by the embodiment of the present application comprises the first boost structure 20 formed by the first DC / DC converter 21 and the super capacitor 22 in parallel, and the second boost structure 30 connected in series with the first boost structure 20. When the electrical device 50 generates a reverse electromotive force, the second boost structure 30 discharges the super capacitor 22, thereby ensuring the voltage stability of the power supply network structure, and improving the probability of the normal work of the electrical device. In addition, the super capacitor 22 can store the discharged power, thereby supplying power to the electrical device 50, improving the use efficiency of the power, and achieving the effect of energy saving.

[0135] In addition, the two-stage boost structure mode of the first boost structure 20 and the second boost structure 30 is adopted, thereby reducing the working voltage of the super capacitor 22, and further shortening the pre-charging time of the power supply network structure. Therefore, the power supply network structure provided by the embodiment can significantly reduce the pre-charging time, so that the voltage of the power supply network structure quickly reaches the working voltage, and the electrical device 50 can quickly work, thereby quickly responding to the needs of the user and improving the user experience.

[0136] In addition, since the number of the battery cells 221 in the super capacitor 22 is reduced, the difficulty of controlling the voltage balance between the battery cells 221 is reduced, so that the energy consumption of the battery cells 221 is reduced, and the start-stop times of the intelligent battery controller 80 are reduced, thereby achieving the effect of energy saving.

[0137] The embodiment of the present application further provides a vehicle, wherein the power supply network structure as described in the above embodiments is arranged in the vehicle.

[0138] It should be understood that many of the materials and devices described herein are capable of having other embodiments and being practiced or carried out in various ways. Other embodiments of the present application will be readily apparent to those skilled in the art from the disclosure herein, once a choice of design has been made from the description and practice of the inventive concept disclosed herein. The present application is intended to cover any and all adaptations or variations of various embodiments of the present application including combinations of the outlying features disclosed herein and equivalents thereof. It is intended to include also any adapted or modified current or later-developed structures, devices, objects, materials, formulations, compositions, compounds, formulations, and methodologies, now known or later developed, which perform substantially the same function or achieve substantially the same result as those described herein provided that such are within the scope of the present application. Accordingly, the scope of the present application is not intended to be limited to the specific illustrative embodiments disclosed in the specification. Rather, the scope of the present application is to be defined by the appended claims and equivalents thereof.

Claims

1. A power supply network structure applied to a vehicle, characterized by, The power supply network structure comprises a power supply structure, a first voltage boosting structure, a second voltage boosting structure, and a distribution structure; wherein the first voltage boosting structure comprises a first direct current-direct current (DC / DC) converter and a super capacitor connected in parallel; The power supply structure is connected with the first DC / DC converter, the first DC / DC converter and the super capacitor are respectively connected with one end of the second voltage boosting structure, the other end of the second voltage boosting structure is connected with the distribution structure, and the distribution structure is connected with the electric devices in the vehicle; The first DC / DC converter is configured to receive a first voltage value of voltage transmitted by the power supply structure, convert the first voltage value of voltage into a second voltage value of voltage, and transmit the obtained second voltage value of voltage to the second voltage boosting structure; The super capacitor is configured to transmit a second voltage value of voltage in the super capacitor to the second voltage boosting structure; wherein the second voltage value is greater than the first voltage value; The second voltage boosting structure is configured to convert the received second voltage value of voltage into a third voltage value of voltage, and transmit the obtained third voltage value of voltage to the distribution structure; wherein the third voltage value is greater than the second voltage value; The distribution structure is configured to distribute the received third voltage value of voltage to the electric devices.

2. The power supply network structure according to claim 1, characterized by, The first voltage boosting structure further comprises an electronic fuse, one end of the electronic fuse is connected with the power supply structure, and the other end of the electronic fuse is connected with the first DC / DC converter; The electronic fuse is configured to be disconnected when an abnormality of the power supply network structure is detected.

3. The power supply network structure according to claim 1 or 2, characterized by, The power supply network structure further comprises a micro control unit, a battery sampling and balancing module (BSM), and an intelligent battery controller; wherein the micro control unit is connected with the super capacitor, the BSM, and the intelligent battery controller respectively; and the BSM is connected with the super capacitor; The BSM is configured to detect a voltage value of an electric core in the super capacitor, and transmit the voltage value of the electric core in the super capacitor to the intelligent battery controller through the micro control unit; The intelligent battery controller is configured to determine a voltage balancing mode corresponding to the super capacitor according to the voltage value of the electric core in the super capacitor, generate a voltage balancing instruction according to the voltage balancing mode, and send the voltage balancing instruction to the micro control unit; wherein the voltage balancing mode represents a balancing mode of the voltage of the electric core in the super capacitor; and the voltage balancing instruction is used to indicate the balancing mode of the voltage of the electric core in the super capacitor; The micro control unit is configured to execute the voltage balancing instruction for the super capacitor to balance the voltage of the electric core in the super capacitor.

4. The power supply network structure according to claim 3, characterized by, Each of the supercapacitors is connected with a first switch corresponding to each of the supercapacitors, and the first switch corresponding to each of the supercapacitors is connected with a resistor loop; the voltage balancing mode is characterized in that the first switch corresponding to the supercapacitor with the closed voltage value greater than the first preset voltage threshold value is closed; the voltage balancing instruction is characterized in that the first switch corresponding to the supercapacitor with the closed voltage value greater than the first preset voltage threshold value is closed. The intelligent battery controller is specifically configured to determine the supercapacitor with the voltage value greater than the first preset voltage threshold value according to the voltage value of each supercapacitor in the supercapacitor, and generate the voltage balancing instruction, and send the voltage balancing instruction to the micro control unit.

5. The power supply network structure according to claim 3, characterized by, Each of the supercapacitors is connected with a second switch corresponding to each of the supercapacitors, and the second switch corresponding to each of the supercapacitors is connected with a second DC / DC converter; the voltage balancing instruction is characterized in that the second switch corresponding to the supercapacitor with the closed voltage value greater than the second preset voltage threshold value and the second switch corresponding to the supercapacitor with the closed voltage value less than the third preset voltage threshold value are closed; The intelligent battery controller is specifically configured to determine the supercapacitor with the voltage value greater than the second preset voltage threshold value and the supercapacitor with the voltage value less than the third preset voltage threshold value according to the voltage value of each supercapacitor in the supercapacitor, wherein the second preset voltage threshold value is greater than the third preset voltage threshold value; and generate the voltage balancing instruction according to the supercapacitor with the voltage value greater than the second preset voltage threshold value and the supercapacitor with the voltage value less than the third preset voltage threshold value, and send the voltage balancing instruction to the micro control unit.

6. The power supply network structure according to any one of claims 1 to 5, characterized by, The power supply structure includes a power battery in a vehicle, a high-voltage DC / DC converter, and a preset battery; the preset battery is a battery with a first voltage value; the power battery is connected with one end of the high-voltage DC / DC converter, and the other end of the high-voltage DC / DC converter and the preset battery are connected with the first voltage boosting structure; The high-voltage DC / DC converter is configured to convert the voltage transmitted by the power battery into a voltage with the first voltage value, and transmit the obtained voltage with the first voltage value to the first voltage boosting structure; The preset battery is configured to transmit the voltage with the first voltage value in the preset battery to the first voltage boosting structure.

7. The power supply network structure according to any one of claims 1 to 6, characterized by, The power supply structure is further configured to transmit the voltage with the first voltage value to the first DC / DC converter to charge the supercapacitor when the second voltage boosting structure is in an off state. The first DC / DC converter is further configured to switch to a voltage boosting mode to output a voltage with a second voltage value to continue charging the supercapacitor when it is determined that the first DC / DC converter is in a working state with the first voltage value.

8. The power supply network structure according to any one of claims 1 to 7, characterized by, The second voltage boosting structure is a third DC / DC converter; The third DC / DC converter is configured to control the third DC / DC converter to enter a voltage reducing mode to charge the supercapacitor when it is detected that the voltage value of the third DC / DC converter is greater than or equal to a fourth preset voltage threshold value for a time period longer than a first preset time period. The third DC / DC converter is further configured to control the third DC / DC converter to enter a boost mode when a time period during which the voltage value of the third DC / DC converter is less than or equal to a fifth preset voltage threshold exceeds a first preset time period.

9. The power supply network structure according to any one of claims 1 to 8, characterized by, The first DC / DC converter is further configured to control the first DC / DC converter to enter a step-down mode to charge a preset battery in the power supply structure when a time period during which the voltage value of the first DC / DC converter is greater than or equal to a sixth preset voltage threshold exceeds a second preset time period during charging of the supercapacitor by the second boost structure. The first DC / DC converter is further configured to control the first DC / DC converter to enter a boost mode when a time period during which the voltage value of the first DC / DC converter is less than or equal to a seventh preset voltage threshold exceeds a second preset time period.

10. The power supply network structure according to any one of claims 1 to 9, characterized by, The supercapacitor includes 10 battery cells.

11. A vehicle characterized by comprising: The vehicle is provided with the power supply network structure according to any one of claims 1-10.

Images