Vehicle power grid system

Abstract

The utility model provides a vehicle power grid system. The vehicle power grid system comprises first power receiving equipment, second power receiving equipment, a voltage conversion circuit and a voltage coordinator. The rated voltage of the first power receiving device is different from the rated voltage of the second power receiving device. The voltage conversion circuit comprises a first output end and a second output end, and the second output end is electrically connected with the grounding end; the first power receiving device is electrically connected between the first output end and the grounding end, and the voltage conversion circuit supplies power to the first power receiving device. The voltage coordinator comprises a first connecting end, a second connecting end and a third connecting end. The third connecting end is electrically connected with the grounding end; the voltage coordinator is electrically connected with the voltage conversion circuit through the first connecting end, the second powered device is electrically connected between the second connecting end and the grounding end, and the voltage coordinator supplies power to the second powered device through the second connecting end. According to the invention, the first power receiving device and the second power receiving device can be rapidly carried on the same vehicle power grid system, and the manufacturing cost of the vehicle power grid system is reduced.

Description

Technical Field

[0001] This application relates to the field of vehicle power grids, and particularly to a vehicle power grid system. Background Art

[0002] With the rapid development of the commercial vehicle field, the requirements for electrification and intelligence are getting higher and higher. For example, the development of automotive intelligent cockpits, intelligent driving, and range-extended power requires the introduction of new electronic control units (ECUs). There are few selectable products for ECUs used to meet the above requirements in the commercial vehicle field, and there are many restrictive conditions; there are more selectable products for ECUs to meet the above requirements in the passenger vehicle field, but there are differences between the voltage platforms (12V) in the passenger vehicle field and the voltage platforms (24V) in the commercial vehicle field, and they cannot be directly installed and used. If the voltage of the ECU is improved, it will require a long development cycle and high development costs, thus greatly increasing the component costs. Utility Model Content

[0003] This application provides a vehicle power grid system that can quickly install electronic control units with different voltage platforms on one voltage platform without generating high development costs.

[0004] In a first aspect, this application provides a vehicle power grid system, including:

[0005] A first power receiving device and a second power receiving device, where the rated voltages of the first power receiving device and the second power receiving device are different;

[0006] A voltage conversion circuit, including a first output terminal and a second output terminal, where the second output terminal is electrically connected to the ground terminal; the first power receiving device is electrically connected between the first output terminal and the ground terminal, and the voltage conversion circuit supplies power to the first power receiving device; and

[0007] A voltage coordinator, including a first connection terminal, a second connection terminal, and a third connection terminal, where the third connection terminal is electrically connected to the ground terminal; the voltage coordinator is electrically connected to the voltage conversion circuit through the first connection terminal, the second power receiving device is electrically connected between the second connection terminal and the ground terminal, and the voltage coordinator supplies power to the second power receiving device through the second connection terminal.

[0008] The voltage conversion circuit outputs voltage to the first power receiving device, and the voltage between the first output terminal and the second output terminal of the voltage conversion circuit matches the rated voltage of the first power receiving device. The voltage coordinator converts the voltage output by the voltage conversion circuit into a voltage that matches the rated voltage of the second power receiving device, and supplies power to the second power receiving device through the voltage coordinator, thereby realizing the rapid installation of the first power receiving device and the second power receiving device on the same vehicle power grid system, reducing the steps of improving and developing the voltage of the first power receiving device or the second power receiving device, reducing the development cycle and development cost, and thus reducing the costs of the first power receiving device, the second power receiving device, and the vehicle power grid system. At the same time, there is no need to set up multiple voltage conversion circuits to supply power to the first power receiving device and the second power receiving device respectively, which is beneficial to the conversion efficiency of the voltage conversion circuit, and reduces the overall weight and manufacturing cost of the vehicle power grid system.

[0009] Optionally, the vehicle power grid system further includes a first storage battery, which is connected in parallel with the second power receiving device; wherein, the voltage output by the second connection end of the voltage coordinator is at least greater than the rated voltage of the first storage battery to charge the first storage battery; the first storage battery supplies power to the second power receiving device.

[0010] Optionally, the vehicle power grid system further includes a second storage battery, which is connected in series with the first storage battery; the second connection end of the voltage coordinator is electrically connected between the first storage battery and the second storage battery; the first storage battery and the second storage battery jointly supply power to the first power receiving device.

[0011] Optionally, the voltage coordinator includes a voltage detection module and a voltage control module electrically connected to the voltage detection module. The voltage detection module respectively detects the output voltage of the first storage battery and the output voltage of the second storage battery through the first connection end and the second connection end; the voltage control module is configured to receive the output voltage of the first storage battery and the output voltage of the second storage battery, and control the output voltage of the second connection end according to the output voltage of the first storage battery and the output voltage of the second storage battery, so that the first storage battery and / or the second storage battery is charged or discharged.

[0012] Optionally, when the voltage detection module detects through the first connection end and the second connection end that the output voltage of the first storage battery is greater than the output voltage of the second storage battery, the voltage control module controls the output voltage of the second connection end to be between the output voltage of the first storage battery and the output voltage of the second storage battery, so that the first storage battery discharges to the second power receiving device, and the voltage conversion circuit charges the second storage battery through the first output end; or

[0013] When the voltage detection module detects that the output voltage of the first battery is equal to the output voltage of the second battery through the first connection end and the second connection end, the voltage control module controls the output voltage of the second connection end to be consistent with the rated voltage of the first battery and the rated voltage of the second battery, and there is no charge or discharge for the first battery and the second battery; the voltage conversion circuit supplies power to the first power receiving device, and the voltage coordinator supplies power to the second power receiving device; or

[0014] When the voltage detection module detects that the output voltage of the first battery is less than the output voltage of the second battery through the first connection end and the second connection end, and the output voltage of the second connection end controlled by the voltage control module is between the output voltage of the first battery and the output voltage of the second battery and greater than half of the voltage output from the first output end of the voltage conversion circuit, the voltage coordinator charges the first battery through the second connection end, and the second battery discharges to the first battery.

[0015] Optionally, the voltage output from the second connection end of the voltage coordinator changes with the voltage output from the first output end of the voltage conversion circuit, and the voltage output from the second connection end of the voltage coordinator is at least half of the voltage output from the first output end of the voltage conversion circuit.

[0016] Optionally, the rated voltage of the first battery is the same as the rated voltage of the second battery.

[0017] Optionally, the sum of the rated voltage of the first battery and the rated voltage of the second battery is adapted to the rated voltage of the first power receiving device.

[0018] Optionally, the rated voltage of the first battery is adapted to the rated voltage of the second power receiving device.

[0019] Optionally, the vehicle power grid system further includes a CAN (Controller Area Network) signal bus, and the voltage coordinator is electrically connected to an external device through the CAN signal bus.

[0020] In a second aspect, the present application further provides a vehicle, including the vehicle power grid system described in the first aspect.

[0021] Through the above settings, during the research and development of vehicles and subsequent improvements, different electronic controllers can be introduced as power-receiving devices to access the vehicle power grid system, enabling the rapid installation of electronic controllers with different rated voltages on the same vehicle power grid system. This reduces the steps of modifying the voltages of the electronic controllers to make them unified, shortens the development cycle and development costs, thereby reducing the costs of the electronic controllers and the vehicle power grid system. At the same time, there is no need to set up multiple voltage conversion circuits to supply power to different electronic controllers separately, which is beneficial to the conversion efficiency of the voltage conversion circuit, and reduces the overall weight and manufacturing cost of the vehicle power grid system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are incorporated herein and form a part of this specification, showing embodiments consistent with the present disclosure and, together with the specification, are used to explain the principles of the present disclosure.

[0023] Figure 1 The figure shows a schematic diagram of an embodiment of the vehicle power grid system of the present application.

[0024] Figure 2 The figure shows a schematic diagram of another embodiment of the vehicle power grid system of the present application.

[0025] Figure 3 The figure shows a schematic diagram of yet another embodiment of the vehicle power grid system of the present application.

[0026] Figure 4 The figure shows a structural schematic diagram of yet another embodiment of the vehicle power grid system of the present application.

[0027] DESCRIPTION OF THE REFERENCE NUMERALS

[0028] Vehicle power grid system 100; First power-receiving device 110; Second power-receiving device 120; Voltage conversion circuit 130; First output terminal 131; Second output terminal 132; Voltage coordinator 140; First connection terminal 141; Second connection terminal 142; Third connection terminal 143; Ground terminal 150; First battery 160; Second battery 170; CAN signal bus 180; External device 190. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0029] Here, the technical solutions in the embodiments (or "embodiment modes") of the present application will be clearly and completely described in conjunction with the accompanying drawings. When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements.

[0030] If there are terms related to directional indication or positional relationship in the embodiments of this application (such as up, down, left, right, front, back, inside, outside, top, bottom, center, vertical, horizontal, longitudinal, lateral, length, width, counterclockwise, clockwise, axial, radial, circumferential, etc.), such terms are only used to explain the relative positional relationship, movement conditions, etc. between components in a specific posture (as shown in the drawings); if the specific posture changes, the directional indication or positional relationship will also change accordingly. In addition, terms such as "first" and "second" in the embodiments of this application are only for the purpose of convenient description and should not be construed as indicating or implying relative importance.

[0031] This application provides a vehicle power grid system 100. The vehicle power grid system 100 of this application will be described in detail below with reference to the accompanying drawings. Without conflict, the features in the following embodiments and implementation manners can be combined with each other.

[0032] Referring Figure 1 As shown, this application provides a vehicle power grid system 100, including a first power receiving device 120, a second power receiving device 120, a voltage conversion circuit 130, and a voltage coordinator 140. Among them, the rated voltage of the first power receiving device 120 is different from that of the second power receiving device 120. The voltage conversion circuit 130 is used to convert the voltage of the vehicle's battery into a voltage that can be used to supply power to the first power receiving device 120. The voltage conversion circuit 130 includes a first output terminal 131 and a second output terminal 132, and the second output terminal 132 is electrically connected to the ground terminal 150. The first power receiving device 120 is electrically connected between the first output terminal 131 and the ground terminal 150, and the voltage conversion circuit 130 supplies power to the first power receiving device 120. The voltage coordinator 140 includes a first connection terminal 141, a second connection terminal 142, and a third connection terminal 143. The voltage coordinator 140 is electrically connected to the voltage conversion circuit 130 through the first connection terminal 141. The second power receiving device 120 is electrically connected between the second connection terminal 142 and the ground terminal 150, and the voltage coordinator 140 supplies power to the second power receiving device 120 through the second connection terminal 142. The second power receiving device 120 is connected between the second connection terminal 142 and the third connection terminal 143. The third connection terminal 143 is electrically connected to the ground terminal 150.

[0033] The voltage output by the voltage conversion circuit 130 is converted into a voltage that matches the rated voltage of the second power receiving device 120 through the voltage coordinator 140. Herein, matching the rated voltage of the second power receiving device 120 means being equal to or slightly greater than the rated voltage of the second power receiving device 120. The second power receiving device 120 is powered by the voltage coordinator 140, thereby enabling the rapid installation of the first power receiving device 120 and the second power receiving device 120 with different rated voltages on the same vehicle power grid system 100, reducing the steps of improving and developing the voltage of the first power receiving device 120 or the second power receiving device 120, reducing the development cycle and development cost, and thus reducing the costs of the first power receiving device 120, the second power receiving device 120, and the vehicle power grid system 100. At the same time, there is no need to set up multiple voltage conversion circuits to supply power to the first power receiving device 120 and the second power receiving device 120 respectively, which is beneficial to the conversion efficiency of the voltage conversion circuit, and reduces the overall weight and manufacturing cost of the vehicle power grid system 100.

[0034] Reference Figure 2 As shown in the optional embodiment, the vehicle power grid system 100 further includes a first battery 160. The first battery 160 is connected in parallel with the second power receiving device 120, that is, both ends of the first battery 160 are respectively connected to both ends of the second power receiving device 120. Herein, the voltage output by the second connection end 142 of the voltage coordinator 140 is at least greater than the rated voltage of the first battery 160 to charge the first battery 160. The first battery 160 powers the second power receiving device 120.

[0035] Through the above settings, the second power receiving device 120 is powered jointly by the first battery 160 and the voltage coordinator 140, which can provide the constant power required by the second power receiving device 120; and can satisfy the operation of the second power receiving device 120 with various rated powers; the output of the first battery 160 is stable and reliable, which can effectively reduce the traffic safety accidents caused by the failure of the vehicle power grid system 100, and is applicable to the situation where the second power receiving device 120 is related to traffic safety or is the controller of the main device, etc.; when the voltage conversion circuit 130 or the voltage coordinator 140 fails, the normal operation of the second power receiving device 120 can be maintained.

[0036] Reference Figure 3As shown, in an alternative embodiment, the vehicle electrical network system 100 further includes a second battery 170. The second battery 170 is connected in series with the first battery 160. The positive terminal of the second battery 170 is electrically connected to the first output terminal 131 of the voltage conversion circuit 130, and the negative terminal of the second battery 170 is connected to the positive terminal of the first battery 160. The second connection terminal 142 of the voltage coordinator is electrically connected between the positive terminal of the first battery 160 and the negative terminal of the second battery 170. The second battery 170 and the first battery 160 are commonly connected in parallel to the first power receiving device 120, and the first battery 160 and the second battery 170 jointly supply power to the first power receiving device 120.

[0037] With the above arrangement, the first battery 160, the second battery 170 and the voltage conversion circuit 130 jointly supply power to the first power receiving device 120, which can provide the constant power required by the first power receiving device 120; and can meet the operation of the first power receiving device 120 with various rated powers; the outputs of the first battery 160 and the second battery 170 are stable and reliable, which can effectively reduce the driving safety accidents caused by the failure of the vehicle electrical network system 100, and is applicable to the situation where the first power receiving device 120 is related to driving safety or is the controller of the main device, etc.; when the voltage conversion circuit 130 or the voltage coordinator 140 fails, the normal operation of the first power receiving device 120 can be maintained.

[0038] In an alternative embodiment, the voltage coordinator 140 includes a voltage detection module and a voltage control module electrically connected to the voltage detection module. The voltage detection module respectively detects the output voltage of the first battery 160 and the output voltage of the second battery 170 through the first connection terminal 141 and the second connection terminal 142. Specifically, the third connection terminal 143 is electrically connected to the ground terminal 150, and the voltage value measured by the voltage detection module through the second connection terminal 142, that is, the difference between the second connection terminal 142 and the third connection terminal 143 is the output voltage of the first battery 160; the difference between the first connection terminal 141 and the second connection terminal 142 is the output voltage of the second battery 170. The voltage control module is used to receive the output voltage of the first battery 160 and the output voltage of the second battery 170, and control the output voltage of the second connection terminal 142 according to the output voltage of the first battery 160 and the output voltage of the second battery 170, so that the first battery 160 and / or the second battery 170 are charged or discharged.

[0039] By means of the voltage detection module, the output voltages of the first storage battery 160 and the second storage battery 170 are obtained, and the working states of the first storage battery 160 and the second storage battery 170 can be obtained in a timely manner, including the normal working, power shortage and overcharging states of the first storage battery 160 and the second storage battery 170, and can be adjusted in a timely manner through the voltage control module to balance the power of the first storage battery 160 and the second storage battery 170, and reduce the risk that the power shortage of the first storage battery 160 and the second storage battery 170 affects the service life of the first storage battery 160 and the second storage battery 170; or the risk that the overcharging of the first storage battery 160 and the second storage battery 170 causes overvoltage of the first power receiving device 120 or the second power receiving device 120, which is beneficial to the use safety of the vehicle power grid system 100.

[0040] When the voltage detection module detects that the output voltage of the first storage battery 160 is greater than the output voltage of the second storage battery 170 through the first connection end 141 and the second connection end 142, the voltage control module controls the output voltage of the second connection end 142 to be between the output voltage of the first storage battery 160 and the output voltage of the second storage battery 170. At this time, the voltage across the first storage battery 160 is less than the output voltage of the first storage battery 160, causing the first storage battery 160 to discharge to the second power receiving device 120; at the same time, the voltage across the second storage battery 170 is greater than the output voltage of the second storage battery 170, causing the voltage conversion circuit 130 to charge the second storage battery 170 through the first output end 131; thus coordinating the power between the first storage battery 160 and the second storage battery 170. For example, when the output voltage of the first storage battery 160 is 14V and the output voltage of the second storage battery 170 is 13V, the voltage of the first output end 131 is 27V, and the output voltage of the second connection end 142 is 13.5V. At this time, the voltage between the second connection end 142 and the third connection end 143 is less than the output voltage of the first storage battery 160, and the first storage battery 160 discharges; the voltage between the first connection end 141 and the second connection end 142 is 13.5V, which is greater than the output voltage of the second storage battery 170, and the second storage battery 170 is charged.

[0041] When the voltage detection module detects that the output voltage of the first battery 160 is equal to the output voltage of the second battery 170 through the first connection terminal 141 and the second connection terminal 142, the voltage control module controls the output voltage of the second connection terminal 142 to be consistent with the rated voltage of the first battery 160 and the rated voltage of the second battery 170, and the first battery 160 and the second battery 170 have no charge or discharge; or the voltage conversion circuit 130 charges the first battery 160 and the second battery 170 simultaneously, that is, the first battery 160 and the second battery 170 are in the same state. The voltage conversion circuit 130 supplies power to the first power receiving device 120, and the voltage coordinator 140 supplies power to the second power receiving device 120. For example, when the output voltage of the first battery 160 is 13.5V and the output voltage of the second battery 170 is 13.5V, the voltage of the first output terminal 131 is 27V, and the output voltage of the second connection terminal 142 is 13.5V. At this time, the voltage between the second connection terminal 142 and the third connection terminal 143 is equal to the output voltage of the first battery 160; the voltage between the first connection terminal 141 and the second connection terminal 142 is equal to the output voltage of the second battery 170. At this time, if the first battery 160 and the second battery 170 are required to supply power to the first power receiving device 120 and the second power receiving device 120, the first battery 160 and the second battery 170 discharge simultaneously, the voltage conversion circuit 130 charges the first battery 160 and the second battery 170, and the voltage coordinator 140 charges the second battery 170. At this time, if the first battery 160 and the second battery 170 do not need to supply power to the first power receiving device 120 and the second power receiving device 120, then the first battery 160 and the second battery 170 are idle simultaneously.

[0042] When the voltage detection module detects that the output voltage of the first battery 160 is less than that of the second battery 170 through the first connection terminal 141 and the second connection terminal 142, the voltage control module controls the output voltage of the second connection terminal 142 to be between the output voltage of the first battery 160 and the output voltage of the second battery 170, and greater than half of the voltage output by the first output terminal 131 of the voltage conversion circuit 130. At this time, the voltage across the first battery 160 is greater than the output voltage of the first battery 160, enabling the voltage coordinator 140 to charge the first battery 160 through the second connection terminal 142; the voltage across the second battery 170 is greater than the output voltage of the second battery 170, causing the second battery 170 to discharge to the first battery 160. In some embodiments, when the output voltage of the first battery 160 is 13V and the output voltage of the second battery 170 is 14V, the voltage of the first output terminal 131 is 27V, and the output voltage of the second connection terminal 142 is 13.7V. At this time, the voltage between the second connection terminal 142 and the third connection terminal 143 is greater than the output voltage of the first battery 160, and the first battery 160 is charged; the voltage between the first connection terminal 141 and the second connection terminal 142 is 13.3V, which is less than the output voltage of the second battery 170, and the second battery 170 discharges.

[0043] During the use of the vehicle power grid system 100, the power of the first battery 160 and the second battery 170 is coordinated according to the above three situations, so that the power of the first battery 160 and the second battery 170 is balanced, reducing the risk that the loss of power of the first battery 160 and the second battery 170 affects the service life of the first battery 160 and the second battery 170; or the overcharging of the first battery 160 and the second battery 170 causes the risk of overvoltage in the first power receiving device 120 or the second power receiving device 120, which is beneficial to the use safety of the vehicle power grid system 100.

[0044] In an alternative embodiment, the voltage output by the second connection terminal 142 of the voltage coordinator 140 changes with the voltage output by the first output terminal 131 of the voltage conversion circuit 130, and the voltage output by the second connection terminal 142 of the voltage coordinator 140 is at least half of the voltage output by the first output terminal 131 of the voltage conversion circuit 130.

[0045] In some embodiments, the voltage output from the second connection terminal 142 of the voltage coordinator 140 is half of the voltage output from the first output terminal 131 of the voltage conversion circuit 130. The voltage between the second connection terminal 142 and the first connection terminal 141 is equal to the voltage between the second connection terminal 142 and the first output terminal 131, that is, the voltage across the first battery 160 is equal to the voltage across the second battery 170. As the first battery 160 and the second battery 170 are used, the output voltages of the first battery 160 and the second battery 170 will decrease. When the output voltage of the first battery 160 is less than the voltage between the second connection terminal 142 and the first connection terminal 141, the first battery 160 can be charged at any time through the voltage coordinator 140. Similarly, when the output voltage of the second battery 170 is less than the voltage between the second connection terminal 142 and the first output terminal 131, the second battery 170 can be charged at any time through the voltage conversion circuit, avoiding the reduction of the service life of the first battery 160 and the second battery 170 due to discharging with insufficient power.

[0046] In other embodiments, when the output voltage of the first battery 160 is greater than the output voltage of the second battery 170, or when the output voltage of the first battery 160 is equal to the output voltage of the second battery 170, the voltage output from the second connection terminal 142 of the voltage coordinator 140 is half of the voltage output from the first output terminal 131 of the voltage conversion circuit 130, that is, the voltage across the first battery 160 is equal to the voltage across the second battery 170. When the output voltage of the first battery 160 is less than the output voltage of the second battery 170, the voltage output from the second connection terminal 142 of the voltage coordinator 140 is greater than half of the voltage output from the first output terminal 131 of the voltage conversion circuit 130, and at the same time, the voltage output from the second connection terminal 142 of the voltage coordinator 140 is less than the output voltage of the second battery 170. In the vehicle power grid system 100, the first battery 160 supplies power to the second power receiving device 120; the first battery 160 and the second battery 170 jointly supply power to the first power receiving device 120. Therefore, the power consumption speed of the first battery 160 is greater than that of the second battery 170. Through the above settings, while discharging the second battery 170, the first battery 160 can be quickly charged, avoiding the reduction of the service life of the first battery 160 due to discharging with insufficient power.

[0047] In an alternative embodiment, after the voltage coordinator 140 is powered on, the voltage detection module continuously detects the output voltage of the first battery 160 and the output voltage of the second battery 170 through the first connection terminal 141 and the second connection terminal 142. Specifically, after the vehicle power grid system 100 is powered on, the voltage of the first connection terminal 141 and the second connection terminal 142 can be continuously detected by the voltage coordinator 140 for 10 to 30 seconds, and the output voltage of the first battery 160 and the output voltage of the second battery 170 can be obtained according to the average value obtained from the continuous detection.

[0048] Through the above settings, each time the vehicle power grid system 100 is powered on, by detecting the output voltage of the first battery 160 and the output voltage of the second battery 170, it is possible to timely detect the output voltage conditions and power consumption conditions of the first battery 160 and the second battery 170, determine the health status of the first battery 160 and the second battery 170, and reduce the risk that the loss of power of the first battery 160 and the second battery 170 affects the service life of the first battery 160 and the second battery 170; or the risk that overcharging of the first battery 160 and the second battery 170 causes overvoltage in the first power receiving device 120 or the second power receiving device 120, enabling the first battery 160 and the second battery 170 to stably supply power to the first power receiving device 120 and the second power receiving device 120, which is beneficial to maintaining the stable operation of the first power receiving device 120 and the second power receiving device 120.

[0049] In an alternative embodiment, the voltage detection module periodically detects the output voltage of the first battery 160 and the output voltage of the second battery 170 through the first connection terminal 141 and the second connection terminal 142. Specifically, after the vehicle power grid system 100 is powered on, the voltage of the first connection terminal 141 and the second connection terminal 142 can be detected by the voltage coordinator 140 every set interval duration. The set interval duration can be 30 minutes, 1 hour, etc., and can be adaptively adjusted according to the vehicle. Alternatively, the vehicle includes a vehicle controller, and the vehicle controller controls the voltage coordinator 140 to detect the voltage of the first connection terminal 141 and the second connection terminal 142 every set mileage by obtaining the mileage of the vehicle. The set interval mileage can be 100 kilometers, 150 kilometers, etc.

[0050] Through the above settings, the vehicle power grid system 100 can timely detect the output voltage conditions and power consumption conditions of the first battery 160 and the second battery 170 during use, determine the health status of the first battery 160 and the second battery 170, and reduce the risk that the dead battery of the first battery 160 and the second battery 170 affects the service life of the first battery 160 and the second battery 170; or the overcharge of the first battery 160 and the second battery 170 causes the risk of overvoltage in the first power receiving device 120 or the second power receiving device 120, so that the first battery 160 and the second battery 170 can stably supply power to the first power receiving device 120 and the second power receiving device 120, which is beneficial to maintaining the stable operation of the first power receiving device 120 and the second power receiving device 120. And by periodically detecting the output voltage of the first battery 160 and the output voltage of the second battery 170, the operation time of the voltage detection module is reduced, and the energy consumption of the vehicle power grid system 100 and the vehicle during use is reduced.

[0051] In an alternative embodiment, the rated voltage of the first battery 160 is the same as the rated voltage of the second battery 170. Specifically, the first power receiving device 120 is an electronic controller in the commercial vehicle field, and the rated voltage is 24V; the second power receiving device 120 is an electronic controller in the passenger vehicle field, and the rated voltage is 12V. The rated voltages of the first battery 160 and the second battery 170 are both 12V. Through the above settings, it is beneficial to achieve the power balance between the first battery 160 and the second battery 170 through the voltage coordinator 140, and reduce the risk that the dead battery of the first battery 160 and the second battery 170 affects the service life of the first battery 160 and the second battery 170; or the overcharge of the first battery 160 and the second battery 170 causes the risk of overvoltage in the first power receiving device 120 or the second power receiving device 120, which is beneficial to the use safety of the vehicle power grid system 100.

[0052] In an alternative embodiment, the sum of the rated voltage of the first battery 160 and the rated voltage of the second battery 170 is adapted to the rated voltage of the first power receiving device 120. In some embodiments, the sum of the rated voltage of the first battery 160 and the rated voltage of the second battery 170 is equal to the rated voltage of the first power receiving device 120. When the first battery 160 and the second battery 170 are operating normally, the first battery 160 and the second battery 170 can maintain the normal operation of the first power receiving device 120, and there is no need to set additional components to adjust the voltage of the first battery 160 and the second battery 170, which is convenient for the structural setting of the vehicle power grid system 100.

[0053] In an alternative embodiment, the rated voltage of the first storage battery 160 is adapted to the rated voltage of the second power receiving device 120. In some embodiments, the rated voltage of the first storage battery 160 is equal to the rated voltage of the second power receiving device 120. When the first storage battery 160 operates normally, there is no need to set additional components to adjust the voltage of the first storage battery 160, which facilitates the structural arrangement of the vehicle power grid system 100.

[0054] Refer to Figure 4 As shown, in an alternative embodiment, the vehicle power grid system 100 further includes a CAN signal bus 180. The voltage coordinator 140 is electrically connected to the external device 190 through the CAN signal bus 180. Among them, the external device 190 may be a vehicle controller, and the vehicle controller can display and prompt the user on the display device of the vehicle. Specifically, it may be a remote learning processor (T-Box) of the vehicle, and the voltage and power conditions of the first storage battery 160 and the second storage battery 170 are fed back to the user's mobile phone, tablet computer, etc. through the telematics processor via wireless signals. Through the above settings, it is convenient for the user to view and obtain the voltage and power conditions of the first storage battery 160 and the second storage battery 170 at any time. When the first storage battery 160 and the second storage battery 170 have insufficient power, etc., the first storage battery 160 and the second storage battery 170 can be charged in time; and when the first storage battery 160 and the second storage battery 170 are damaged, the first storage battery 160 and the second storage battery 170 can be replaced in time, thereby ensuring the normal operation of the vehicle power grid system 100 and being beneficial to the use safety and reliability of the vehicle power grid system 100.

[0055] This application also provides a vehicle, including the vehicle power grid system 100. The first power receiving device 120 may be an electronic controller with a rated voltage of 24V, and the second power receiving device 120 may be an electronic controller with a rated voltage of 12V. During the research and development of the vehicle and subsequent improvements, electronic controllers with different rated voltages can be introduced as power receiving devices to be connected to the vehicle power grid system 100, realizing the rapid installation of electronic controllers with different rated voltages on the same vehicle power grid system 100, reducing the steps of improving the voltage of the electronic controller to make it unified, reducing the development cycle and development cost, thereby reducing the cost of the electronic controller and the vehicle power grid system 100. At the same time, there is no need to set multiple voltage conversion circuits to supply power to different electronic controllers respectively, which is beneficial to the conversion efficiency of the voltage conversion circuit, reducing the overall weight and manufacturing cost of the vehicle power grid system 100.

[0056] It should be noted that the technical solutions or technical features described in the above embodiments can be combined or supplemented with each other without conflict. The scope of protection of this application is not limited to the exact structures described in the above embodiments and shown in the drawings; all modifications, equivalent replacements, improvements, etc. made within the spirit and principles of this application shall be included within the scope of protection of this application.

Claims

1. A vehicle power grid system, characterized in that: include: a first powered device and a second powered device, wherein a rated voltage of the first powered device is different from a rated voltage of the second powered device; A voltage conversion circuit comprises a first output terminal and a second output terminal, wherein the second output terminal is electrically connected to a ground terminal; the first powered device is electrically connected between the first output terminal and the ground terminal, and the voltage conversion circuit supplies power to the first powered device; and A voltage coordinator comprises a first connection end, a second connection end and a third connection end, wherein the third connection end is electrically connected to the ground end; the voltage coordinator is electrically connected to the voltage conversion circuit through the first connection end, the second powered device is electrically connected between the second connection end and the ground end, and the voltage coordinator supplies power to the second powered device through the second connection end.

2. The vehicle power grid system according to claim 1, characterized in that: The vehicle power grid system also includes a first battery connected in parallel with the second powered device; wherein the voltage output by the second connection end of the voltage coordinator is at least greater than the rated voltage of the first battery to charge the first battery; and the first battery supplies power to the second powered device.

3. The vehicle power grid system according to claim 2, characterized in that: The vehicle power grid system also includes a second battery connected in series with the first battery; the second connection end of the voltage coordinator is electrically connected between the first battery and the second battery; the first battery and the second battery jointly supply power to the first powered device.

4. The vehicle power grid system according to claim 3, characterized in that: The voltage coordinator includes a voltage detection module and a voltage control module electrically connected to the voltage detection module, wherein the voltage detection module detects the output voltage of the first battery and the output voltage of the second battery through the first connection terminal and the second connection terminal respectively; The voltage control module is used to receive the output voltage of the first battery and the output voltage of the second battery, and control the output voltage of the second connection end according to the output voltage of the first battery and the output voltage of the second battery, so that the first battery and / or the second battery are charged or discharged.

5. The vehicle power grid system according to claim 4, characterized in that: When the voltage detection module detects through the first connection terminal and the second connection terminal that the output voltage of the first storage battery is greater than the output voltage of the second storage battery, the voltage control module controls the output voltage of the second connection terminal to be between the output voltage of the first storage battery and the output voltage of the second storage battery, so that the first storage battery discharges to the second powered device, and the voltage conversion circuit charges the second storage battery through the first output terminal; or When the voltage detection module detects through the first connection terminal and the second connection terminal that the output voltage of the first battery is equal to the output voltage of the second battery, the voltage control module controls the output voltage of the second connection terminal to be consistent with the rated voltage of the first battery and the rated voltage of the second battery, the first battery and the second battery are not charged or discharged, or the voltage conversion circuit charges the first battery and the second battery at the same time; the voltage conversion circuit supplies power to the first powered device, and the voltage coordinator supplies power to the second powered device; or When the voltage detection module detects through the first connection end and the second connection end that the output voltage of the first battery is less than the output voltage of the second battery, the voltage control module controls the output voltage of the second connection end to be between the output voltage of the first battery and the output voltage of the second battery, and greater than half of the voltage output by the first output end of the voltage conversion circuit, so that the voltage coordinator charges the first battery through the second connection end and the second battery discharges to the first battery.

6. The vehicle power grid system according to claim 5, characterized in that: The voltage output by the second connection end of the voltage coordinator varies with the voltage output by the first output end of the voltage conversion circuit, and the voltage output by the second connection end of the voltage coordinator is at least half of the voltage output by the first output end of the voltage conversion circuit.

7. The vehicle power grid system according to claim 3, characterized in that: The rated voltage of the first battery is the same as the rated voltage of the second battery.

8. The vehicle power grid system according to claim 3, characterized in that: The sum of the rated voltage of the first battery and the rated voltage of the second battery matches the rated voltage of the first powered device; and / or The rated voltage of the first battery is adapted to the rated voltage of the second powered device.

9. The vehicle power grid system according to claim 1, characterized in that: The vehicle power grid system further includes a CAN signal bus, and the voltage coordinator is electrically connected to external devices via the CAN signal bus.

10. A vehicle, characterized in that: include: The vehicle power system according to any one of claims 1 to 9.

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