Vehicle-mounted communication terminal power supply system and vehicle-mounted communication terminal

Abstract

The utility model provides a vehicle-mounted communication terminal power supply system and a vehicle-mounted communication terminal, and belongs to the technical field of vehicles. The power supply system includes: a plurality of power supply modules; for any power supply module, the input end of the power supply module is connected with a power supply, the power supply module is provided with at least one output end, and each output end of the power supply module is used for supplying power to one type of load corresponding to the power supply module; wherein the first power supply chip is a single-output direct-current converter, and the power supply module is formed by cascading at least one first power supply chip to form at least one output end of the power supply module to respectively output different direct currents. According to the vehicle-mounted communication terminal power supply system, a special power supply management chip is not selected to supply power to the loads, the loads are classified, the power supply chips are adopted to build the power supply modules for different types of loads to supply power, the flexibility is good, and the cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of vehicles, in particular to a power supply system for an in-vehicle communication terminal and an in-vehicle communication terminal. Background Art

[0002] TBOX (Telematics BOX, in-vehicle communication terminal) is a key module connecting the vehicle to the external network, responsible for data transmission and reception. Whether the power supply is stable is directly related to whether the functions of the TBOX can be realized normally, such as remote control, emergency call, etc.

[0003] In the prior art, the power supply requirements of different modules in the TBOX are different. Usually, a power management chip with multiple output terminals that can supply power to multiple loads simultaneously is used to manage the power supply of the TBOX. However, due to the relatively fixed specifications of the power management chip, that is, the number of output ports, the output voltage of each output port, and the maximum output current of each output port are all fixed, it cannot meet the requirements of specific scenarios, has poor flexibility, and high costs. Summary of the Utility Model

[0004] Embodiments of the utility model provide a power supply system for an in-vehicle communication terminal and an in-vehicle communication terminal to solve the problems in the prior art that the power supply of the in-vehicle communication terminal is managed by a power management chip, with insufficient flexibility and high costs.

[0005] In a first aspect, embodiments of the utility model provide a power supply system for an in-vehicle communication terminal, including: a plurality of power modules;

[0006] For any one of the power modules, the input end of the power module is connected to a power supply, the power module has at least one output end, and each output end of the power module is used to supply power to a corresponding type of load;

[0007] Among them, the first power chip is a single-output DC converter, and the power module is formed by cascading at least one first power chip to form at least one output end of the power module, respectively outputting different direct currents.

[0008] Optionally, the first power chips in the power module are connected to form a tree structure;

[0009] Among them, the input end of the first-stage first power chip forms the input end of the power module, and the output ends of the last-stage first power chips form the output ends of the power module.

[0010] Optionally, when the power module includes at least two first power chips, the power module further includes: a backup power unit, a first switch, and a second switch;

[0011] The charging terminal of the backup power unit is connected to the first node in the power supply module, and the discharging terminal of the backup power unit is connected to the second node in the power supply module through the first switch; the second node is also connected to the upper-level first power chip through the second switch;

[0012] Among them, the nodes in the power supply module include: the input terminal of the first-stage first power chip, the output terminals of each last-stage first power chip, and the connection points between adjacent two first power chips; the first node and the second node are nodes in the power supply module.

[0013] Optionally, the backup power unit includes: a battery and a second power chip;

[0014] The output terminal of the battery forms the charging terminal of the backup power unit, and the output terminal of the battery is also connected to the input terminal of the second power chip;

[0015] The output terminal of the second power chip forms the discharging terminal of the backup power unit.

[0016] Optionally, when there are backup power units in at least two power supply modules, each backup power unit shares the battery;

[0017] The output terminal of the battery is connected to the first node in any one of the power supply modules, and the output terminal of the battery is respectively connected to the input terminals of the second power chips in each backup power unit.

[0018] Optionally, the power supply module further includes: at least one sleep switch;

[0019] For any one sleep switch, the first end of the sleep switch is connected to the load corresponding to the sleep switch, and the second end of the sleep switch is connected to the output terminal of the first power chip directly supplying power to the load corresponding to the sleep switch.

[0020] Optionally, for any one output terminal of the power supply module, the output terminal is connected to at least one load.

[0021] Optionally, the first power chip is a linear power supply or a switching power supply.

[0022] Optionally, when the first power chip is a switching power supply, the first power chip is of BUCK architecture or BOOST architecture.

[0023] In a second aspect, an embodiment of the present invention provides a vehicle-mounted communication terminal, including the vehicle-mounted communication terminal power supply system provided in the first aspect of the above embodiment.

[0024] An embodiment of the present utility model provides a vehicle-mounted communication terminal power supply system and a vehicle-mounted communication terminal. The vehicle-mounted communication terminal power supply system includes: a plurality of power modules; for any one power module, the input end of the power module is connected to a power supply, the power module has at least one output end, and each output end of the power module is used to supply power to a type of load corresponding to the power module; wherein, the first power chip is a single-output DC converter, and the power module is cascaded by at least one first power chip to form at least one output end of the power module, and different direct currents are output respectively. In the embodiment of the present utility model, the vehicle-mounted communication terminal power supply system supplies power to the vehicle-mounted communication terminal, and the power supply requirements of each functional module in the vehicle-mounted communication terminal are different. Based on this, different functional modules (loads) in the vehicle-mounted communication terminal can be classified according to the power supply requirements. Then, for different types of loads, single-output power chips with low cost are cascaded, and multiple voltage conversions are performed through each first power chip to build a power module capable of outputting multiple direct currents to supply power to each load respectively, instead of using a multi-output dedicated power management chip for power supply, which has good flexibility and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0026] Figure 1 is a schematic circuit structure diagram of a vehicle-mounted communication terminal power supply system provided by an embodiment of the present utility model;

[0027] Figure 2 is a schematic circuit structure diagram of a power module provided by an embodiment of the present utility model;

[0028] Figure 3 is a schematic connection diagram of a backup power supply unit provided by an embodiment of the present utility model;

[0029] Figure 4 is another schematic connection diagram of a backup power supply unit provided by an embodiment of the present utility model;

[0030] Figure 5 is a schematic circuit structure diagram of a backup power supply unit provided by an embodiment of the present utility model;

[0031] Figure 6 is a schematic connection diagram of the common battery connection of the backup power supply units of each power module provided by an embodiment of the present utility model;

[0032] Figure 7It is a schematic diagram of the circuit structure of another power module provided by an embodiment of the present utility model;

[0033] Figure 8 It is a schematic diagram of the connection relationship where one output terminal of the power module provided by an embodiment of the present utility model is connected to multiple loads;

[0034] Figure 9 It is a circuit schematic diagram of an input module provided by an embodiment of the present utility model;

[0035] Figure 10 It is a circuit schematic diagram of the first power module provided by an embodiment of the present utility model;

[0036] Figure 11 It is a circuit schematic diagram of the second power module provided by an embodiment of the present utility model;

[0037] Figure 12 It is a circuit schematic diagram of the [specific number]th power module provided by an embodiment of the present utility model. Detailed implementation manners

[0038] In order to enable those skilled in the art to better understand this solution, the technical solutions in the embodiments of this solution will be clearly described below in conjunction with the accompanying drawings in the embodiments of this solution. Obviously, the described embodiments are part of the embodiments of this solution, rather than all of the embodiments. Based on the embodiments in this solution, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the scope of protection of this solution.

[0039] The term "including" in the description and claims of this solution and any other variations thereof mean "including but not limited to", intending to cover non-exclusive inclusion and not limited only to the examples listed in the text. In addition, terms such as "first" and "second" are used to distinguish different objects, rather than to describe a specific order.

[0040] The following is a detailed description of the implementation of the present utility model in conjunction with specific drawings:

[0041] The in-vehicle communication terminal (Telematics BOX, TBOX) is a key module connecting the vehicle and the external network, responsible for data transmission and reception. As an important part of the vehicle networking system, whether the power supply is stable is directly related to whether the functions of the TBOX can be realized normally.

[0042] The TBOX function is very powerful and has multiple functional modules inside (such as step-down, wake-up, sleep, etc.). The power supply requirements of each functional module are also different. In the prior art, a dedicated power management chip is usually used to supply power to the TBOX. The dedicated power management chip has multiple output ports, which respectively output different direct currents and can supply power to different functional modules simultaneously to meet the power supply requirements of different functional modules. However, there are certain problems when the power management chip is applied to supply power to the TBOX: 1. The functions and specifications of the power management chip are fixed (the number of output ports, the output voltage and load capacity of each output port are fixed), and it cannot meet the power supply requirements of some special application scenarios. Therefore, there are certain limitations in use and the flexibility is not good enough. For example, the vehicle needs 1 1.8V power supply, 2 3.6V power supplies, and 3 5V power supplies, while the current power management chip only has 2 3.6V output ports and two 5V output ports, which cannot meet the current application requirements. It is necessary to introduce a second power management chip to meet the application requirements, and the two power management chips may also make some output ports idle, resulting in waste of resources. 2. The cost of the power management chip is relatively high; for specific application scenarios, it is necessary to customize the power management chip, and the cost is even higher. 3. The power management chip integrates multiple functions and has a large heat dissipation. Specific cooling measures need to be taken during the plate-making process to protect the chip, which further increases the cost.

[0043] Based on the above problems, referring to Figure 1 , the embodiment of the present invention provides a circuit structure schematic diagram of a vehicle-mounted communication terminal power supply system. Referring to Figure 1 , the vehicle-mounted communication terminal power supply system includes: a plurality of power modules 1;

[0044] For any one of the power modules 1, the input end of the power module 1 is connected to the power supply, and the power module 1 has at least one output end. Each output end of the power module 1 is used to supply power to a type of load corresponding to the power module 1;

[0045] Among them, the first power chip is a single-output DC converter, and the power module 1 is cascaded by at least one first power chip to form at least one output end of the power module 1, which respectively outputs different direct currents.

[0046] Single-output DC converter chips (such as DCDC, LDO, etc.) are mature in technology, low in device cost, small in size, rich in types, and wide in selection range. Therefore, in the embodiments of the present utility model, a first power chip (single-output DC converter) is used to build a power module 1 to supply power to the TBOX, which has high flexibility and greatly reduces the cost. At the same time, based on the power supply requirements of different functional modules in the TBOX, each functional module can be classified, and different power modules 1 can be designed for different types of loads (for example, the first type of load, the second type of load,..., the nth type of load). For example, classification can be carried out according to voltage and current requirements, or according to power supply priority, so as to use multiple power modules 1 to jointly supply power to the TBOX, ensuring reliable and stable power supply to the TBOX, and ensuring that the TBOX can operate stably and efficiently under various conditions, providing reliable remote control and information services for the vehicle.

[0047] As mentioned above, at least one power chip in the power module 1 is cascaded to form a power module 1 having at least one output terminal. Among them, the cascade can be various forms of cascade. For example, a mesh structure, a tree structure, etc.

[0048] In a possible implementation manner, referring to Figure 2 , the first power chips in the power module 1 can be connected to form a tree structure;

[0049] Among them, the input terminal of the first-stage first power chip forms the input terminal of the power module 1, and the output terminals of the first power chips at the last stage form the output terminals of the power module 1.

[0050] For multiple loads of the same type, if each load is powered by a single power chip respectively, the number of power chips will be very large. Therefore, in the embodiments of the present utility model, a tree structure is built using multiple first power chips, and different first power chips are configured according to the power supply requirements to optimize the design of the power system, which can effectively reduce the number of power chips used, thereby reducing the power cost.

[0051] For example, referring to Figure 2 , the first type of load includes: load 1, load 2,..., load n. Based on the power supply requirements of each load, a tree structure as shown in Figure 2 is designed, and the first power chips at each level perform voltage conversion in sequence to meet the different power supply requirements of each load.

[0052] At the same time, the power module 1 adopts a tree structure and can be customized according to specific application scenarios and requirements to ensure the accuracy and stability of the TBOX power supply.

[0053] Furthermore, the tree structure has strong scalability and can be flexibly adjusted according to the complexity of the TBOX system and changes in power requirements to meet the power needs at different stages. For example, when the TBOX function changes, the tree structure can be adjusted according to requirements, which not only reduces costs but also further improves the flexibility of power supply.

[0054] It should be noted that the parameters of the first power chips in the power module 1 can be different to meet the power supply requirements of different loads.

[0055] The specific structure of the power module formed by the first power chips has been described. For the power module with a tree structure, since the first first power chip is powered by the power supply, and each first power chip is cascaded in sequence, if the power supply is abnormal, the entire power module cannot supply power normally.

[0056] Based on this, in a possible implementation, referring to Figure 3 , when the power module 1 includes at least two first power chips, the power module 1 may further include: a backup power unit 11, a first switch K1, and a second switch K2;

[0057] The charging end of the backup power unit 11 is connected to the first node d1 in the power module 1, and the discharging end of the backup power unit 11 is connected to the second node d2 in the power module 1 through the first switch K1; the second node d2 is also connected to the upper-level first power chip through the second switch K2;

[0058] Among them, the nodes in the power module 1 include: the input end of the first-stage first power chip, the output ends of the last-stage first power chips, and the connection points between adjacent two first power chips; the first node d1 and the second node d2 are nodes in the power module 1.

[0059] When a vehicle breaks down, the TBOX enters the sleep mode and wakes up, the power supply from the power supply is disconnected. To ensure the normal operation of the necessary functional modules (such as emergency call, satellite communication, etc.) of the vehicle in the above special situations, a backup power unit 11 is provided in the power module 1 in the embodiment of the present invention, which is used to ensure the normal power supply of the necessary power modules when the power supply is abnormal, thereby improving the reliability of the power system.

[0060] Referring to Figure 3 , based on the design of the tree structure, the charging end and the discharging end of the backup power unit 11 are respectively connected to the nodes in the tree structure. When the power supply is normal, the first switch K1 is disconnected and the second switch K2 is closed. The power supply normally supplies power to each load and charges the backup power unit 11 at the same time; when the power supply is abnormal, the power supply is automatically switched. The second switch K2 is disconnected and the first switch K1 is closed. The backup power unit 11 supplies power to the subsequent loads through the second node d2 to ensure the normal power supply of each load.

[0061] The load after the second node d2 is the load to ensure power supply (necessary functional module), and the position of the second node d2 can be flexibly selected according to the load demand and the discharge voltage of the backup power unit 11; the first node d1 is used to charge the backup power unit 11, and the position of the first node d1 can also be flexibly selected according to the charging voltage, etc.

[0062] Specifically, referring to Figure 3 , the positions of the first node d1 and the second node d2 are different. The load after the second node d2 is the load that needs to ensure power supply, and the voltage at the first node d1 matches the charging voltage of the backup power unit 11.

[0063] Referring again to Figure 4 , the positions of the first node d1 and the second node d2 can also be the same, and the details are not elaborated here.

[0064] The backup power unit 11 serves as a backup power supply and is used to provide electrical energy to the power module 1 when the power supply is abnormal. Therefore, the backup power unit 11 should be an energy storage unit, for example, battery energy storage, flywheel energy storage, compressed air energy storage, etc.

[0065] Based on considerations such as cost and technological maturity, in a possible implementation manner, referring to Figure 5 , the backup power unit 11 may include: a battery BT and a second power chip;

[0066] The output end of the battery BT forms the charging end of the backup power unit 11, and the output end of the battery BT is also connected to the input end of the second power chip;

[0067] The output end of the second power chip forms the discharge end of the backup power unit 11.

[0068] Since battery energy storage technology is relatively mature, low-cost, long-lived, and high in power density, and is suitable for the application scenario of this application, the backup power unit 11 in this application uses battery energy storage. The second power chip is used to change the voltage output by the battery BT so that the output voltage of the backup power unit 11 matches the voltage at the second node d2. For example, referring to Figure 5 , if the discharge voltage of the battery BT is 3.6V and the voltage at the second node d2 is 5V, the second power chip can select a DCDC boost with a BOOST architecture to boost the 3.6V voltage to 5V to provide power supply for each load after the second node d2, ensuring communication and data transmission, etc. during sleep or emergency situations. For example, when a vehicle accident occurs, the battery BT in the backup power unit 11 can ensure the continuous operation of the TBOX to implement the emergency call function and ensure the safety of the occupants.

[0069] Based on the above, the present application provides a backup power unit 11 to ensure the power supply stability of the power module 1. Since the in-vehicle communication terminal power supply system provided by the present application includes multiple power modules 1, if the first type of loads corresponding to each power module 1 include loads that require power supply guarantee, backup power units 11 need to be provided for each power module 1. Since the volume of the battery BT is relatively large and the in-vehicle space is small, if backup power units 11 are provided for each power module 1, it is not conducive to the miniaturization and lightweight of the vehicle.

[0070] Based on this, in a possible implementation manner, referring to Figure 6 , when at least two power modules 1 both include backup power units 11, each backup power unit 11 can share the battery BT;

[0071] The output terminal of the battery BT is connected to the first node d1 in any one of the power modules 1, and the output terminal of the battery BT is respectively connected to the input terminals of the second power chips in each backup power unit 11.

[0072] For the power modules 1 in multiple parallel paths, each backup power unit 11 can share one battery BT. Among them, referring to Figure 6 , only one path of the power module 1 needs to charge the battery BT. To match the voltages of the second nodes d2 in each different power module 1, the battery BT is respectively connected to the input terminals of each second power chip, and after voltage conversion, the battery BT supplies power to each second node d2 simultaneously.

[0073] Since the performance of the battery pack is not very stable, in order to intelligently manage and maintain the battery pack, prevent the battery from overcharging and over-discharging, extend the service life of the battery, and monitor the state of the battery, a battery management circuit is usually configured for the battery pack to effectively manage the battery pack.

[0074] In a possible implementation manner, the battery BT may include: a battery pack and a battery management circuit; the battery management circuit manages the charging and discharging of the battery pack to ensure that the battery BT always maintains a good working state to extend the service life of the battery BT.

[0075] Exemplarily, the battery pack may be a nickel-metal hydride battery. The nickel-metal hydride battery has a high energy density, low cost, and many cycle times, and is suitable for use in vehicles.

[0076] It should be noted that the capacity of the battery BT should be large enough to meet the low-power consumption requirements of the TBOX in the sleep mode and the working requirements within a short time after waking up, etc.

[0077] The specific structure of the power supply module 1 has been described in detail above. By cascading each first power chip, different direct currents are output to supply power to each functional module. For the above structure, the power supply module 1 supplies power to each corresponding functional module simultaneously, and it is impossible to supply power only to some corresponding functional modules.

[0078] Based on this, in a possible implementation manner, referring to Figure 7 , the power supply module 1 may further include: at least one sleep switch K3;

[0079] For any one sleep switch K3, the first end of the sleep switch K3 is connected to the load corresponding to the sleep switch K3, and the second end of the sleep switch K3 is connected to the output end of the first power chip that directly supplies power to the load corresponding to the sleep switch K3.

[0080] When the TBOX is in the sleep state, some modules do not need to be powered. Based on this, in the embodiment of the present utility model, the sleep switch K3 is set. When the TBOX is in the sleep state, the sleep switch K3 connected to the corresponding non-essential functional module is disconnected to cut off the power supply of the non-essential functional module to save electric energy.

[0081] In the foregoing embodiment, each output end of the power supply module 1 is used to supply power to a type of load corresponding to the power supply module 1. One output end of the power supply module 1 can supply power to only one load or can supply power to multiple loads simultaneously. In a possible implementation manner, referring to Figure 8 , for any one output end of the power supply module 1, the output end is connected to at least one load.

[0082] For multiple functional modules (loads) with the same power supply voltage, they can be connected to the same output end of the power supply module 1, further reducing the number of first power chips used and reducing the cost of the power supply system.

[0083] Referring to Figure 8 , the power supply voltages of multiple functional modules are the same and are connected to the same first power chip.

[0084] It should be noted that the parameters of the first power chip should be able to meet the power supply requirements of each load. For example, the total current requirement of each load should be less than the maximum output current of the first power chip.

[0085] Corresponding to Figure 8 , for multiple loads (different functional modules in the TBOX) connected to the output end of the same power supply module 1, the sleep switch K3 can be set to cut off the power supply of the non-essential functional module.

[0086] Based on the above embodiment, the first power chip is a single-output DC converter for performing DC conversion.

[0087] In a possible implementation, the first power chip can be a linear power supply (LDO) or a switching power supply (DCDC).

[0088] In the embodiments of the present utility model, for the voltage and current requirements of different functional modules in the TBOX, a linear power supply or a switching power supply can be selected for voltage conversion. For example, for a power module sensitive to noise, a linear power supply (LDO) can be used; for example, an audio decoder; while for a functional module with large current and large voltage difference, a switching power supply (DCDC) can be used. It can be specifically selected according to actual application requirements.

[0089] In a possible implementation, when the first power chip is a switching power supply, the first power chip can be a BUCK architecture or a BOOST architecture.

[0090] Based on different supply voltages, the switching power supply can be a BUCK architecture or a BOOST architecture, which can be selected according to actual application requirements.

[0091] In a possible implementation, the power supply can be provided by the in-vehicle power supply, and the voltage can be 12V.

[0092] Exemplarily, the power supply system of the vehicle-mounted communication terminal may further include: an input module; the input module is used for overcurrent protection, overvoltage protection, reverse connection prevention, electromagnetic interference, etc.

[0093] The circuit schematic diagram of the input module refers to Figure 9 . Two self-resetting fuses are connected in parallel for protection, which fully ensures the reliability and current capacity of the power supply system. At the same time, the input module can also effectively protect the power supply system from external abnormal voltages, currents, and electromagnetic interference. The specific circuit principle will not be elaborated here.

[0094] Further, the power supply system further includes: a voltage sampling module.

[0095] The voltage sampling module is used to sample the voltage of the power supply and send it to the upper computer for fault detection, etc.

[0096] Specifically, the voltage sampling module may include: a resistor voltage division unit, a filtering unit, and an operational amplifier unit; the power supply voltage is divided by the resistor voltage division power supply and then filtered by the filtering unit and input to the operational amplifier unit. The operational amplifier unit is used for impedance matching, so as to sample the voltage of the power supply and output it to the upper computer.

[0097] The circuits of the resistor voltage division unit, the filtering unit, and the operational amplifier unit are all conventional technical means in the art, and will not be elaborated here specifically.

[0098] The above power supply system will be described in detail below with specific embodiments.

[0099] Reference Figures 10 to 12 , the vehicle-mounted communication terminal power supply system includes 3 power modules 1, and the power supply voltage is 12V.

[0100] 1. The first power module 1:

[0101] Considering that the operating voltage and current of the V2X compensator (V2X_ANT) are relatively large (current is 1A, voltage is 7V), and taking into account the requirement that the V2X compensator does not need to be powered when the TBOX is in sleep mode, a separate power supply system is designed to supply power to the V2X compensator. Reference Figure 10 , step down the voltage through DCDC (BUCK architecture) to an output voltage of 7V.

[0102] 2. The second power module 1:

[0103] Reference Figure 11 , step down the voltage through LDO and DCDC (BUCK) to provide the required 1.8V, 3.3V, 4.5V, and 3.8V voltages for BT / WIFI_5, V2X, HSM, and SatelliteModule (satellite communication module). Among them, the BT / WIFI_5 module is powered by converting to 1.8V and 3.3V through LDO and DCDC; the V2X module is directly powered by 5V; the HSM is powered by converting to 3.3V through LDO; the satellite communication module is powered by converting to 3.8V and 4.5V through LDO and DCDC. At the same time, to ensure reliable power supply for the satellite communication module, a dual-path power supply mechanism is designed, and a backup power supply unit 11 is connected to ensure reliable communication in case of emergency.

[0104] 3. The third power module 1;

[0105] Reference Figure 12 , step down the 12V power supply to 5V through DCDC (BUCK), and then use LDO and DCDC (BOOST) to provide the required voltages for the MCU, audio amplifier, MIC, communication module, Ethernet module, codec chip, etc. The operating voltage of the MIC is 8V, but the power supply of other modules except the MIC is less than 5V. Therefore, in the embodiment of the present invention, the voltage is first stepped down to meet the power supply requirements of most modules, and then the MIC is boosted separately. On the premise of meeting the power supply requirements, the number of chips used is minimized as much as possible.

[0106] Corresponding to the above embodiments, the embodiment of the present invention also provides a vehicle-mounted communication terminal, including the vehicle-mounted communication terminal power supply system provided in the above embodiments of the present invention, and having the advantages of any one of the above vehicle-mounted communication terminal power supply systems. Details are not described herein again.

[0107] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A vehicle-mounted communication terminal power supply system, characterized in that: include: Multiple power modules; For any power module, the input end of the power module is connected to the power supply, the power module has at least one output end, and each output end of the power module is used to supply power to a type of load corresponding to the power module; Among them, the first power chip is a single-output DC converter, and the power module is cascaded by at least one first power chip to form at least one output end of the power module, which outputs different direct currents respectively.

2. The vehicle-mounted communication terminal power supply system according to claim 1, characterized in that: The first power chips in the power module are connected to form a tree structure; The input end of the first power chip of the first stage forms the input end of the power module, and the output ends of the first power chips of the last stage form the output ends of the power module.

3. The vehicle-mounted communication terminal power supply system according to claim 2, characterized in that: When the power module includes at least two first power chips, the power module further includes: a backup power unit, a first switch and a second switch; The charging end of the backup power unit is connected to the first node in the power module, and the discharging end of the backup power unit is connected to the second node in the power module through the first switch; the second node is also connected to the upper first power chip through the second switch; Among them, the nodes in the power module include: the input end of the first-stage first power chip, the output end of each first power chip of the last stage and the connection point between two adjacent first power chips; the first node and the second node are nodes in the power module.

4. The vehicle-mounted communication terminal power supply system according to claim 3, characterized in that: The backup power unit includes: a battery and a second power chip; The output end of the battery forms a charging end of the backup power unit, and the output end of the battery is also connected to the input end of the second power chip; The output end of the second power chip forms a discharge end of the backup power unit.

5. The vehicle-mounted communication terminal power supply system according to claim 4, characterized in that: When at least two power modules both include the backup power unit, each backup power unit shares the battery; The output end of the battery is connected to the first node in any one of the power modules, and the output end of the battery is respectively connected to the input end of the second power chip in each backup power unit.

6. The vehicle-mounted communication terminal power supply system according to any one of claims 1 to 5, characterized in that: The power module further includes: at least one sleep switch; For any sleep switch, a first end of the sleep switch is connected to a load corresponding to the sleep switch, and a second end of the sleep switch is connected to an output end of a first power chip that directly supplies power to the load corresponding to the sleep switch.

7. The vehicle-mounted communication terminal power supply system according to any one of claims 1 to 5, characterized in that: For any output terminal of the power module, the output terminal is connected to at least one load.

8. The vehicle-mounted communication terminal power supply system according to any one of claims 1 to 5, characterized in that: The first power chip is a linear power supply or a switching power supply.

9. The vehicle-mounted communication terminal power supply system according to claim 8, characterized in that: When the first power chip is a switching power supply, the first power chip is a BUCK architecture or a BOOST architecture.

10. A vehicle-mounted communication terminal, characterized in that: It comprises the vehicle-mounted communication terminal power supply system as described in any one of claims 1 to 9.

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