Intelligent distribution box of automobile

Abstract

The invention discloses an intelligent power distribution box of an automobile, which comprises a first power distribution assembly, the first power distribution assembly comprises a first power distribution box, a first power supply module and a second power supply module, and the first power distribution box provides an independent input channel and an independent output channel for the first power supply module and the second power supply module; the first power supply module is used for converting a power supply voltage of a third voltage of the new energy automobile into a power supply of a first voltage, inputting the power supply into the first distribution box through a first input channel, and supplying power to a load of a voltage platform of the first voltage through a first output channel; the second power supply module is used for converting a high-voltage power supply of the new energy automobile into a power supply with a second voltage, inputting the power supply into the first distribution box through a second input channel and supplying power to a load of a voltage platform with the second voltage through a second output channel; wherein the third voltage is greater than the first voltage. According to the invention, compatibility of power supply signals of different voltage platforms is realized, and power utilization safety and vehicle reliability are improved.

Description

Technical Field

[0001] The present application relates to the technical field of automobile power distribution, and more specifically, to an intelligent power distribution box of an automobile. Background Art

[0002] As 12V electrical appliances with mature applications in the passenger car market, such as smart cockpits, autonomous driving, and wire-controlled braking / steering, are gradually expanded to commercial vehicles using 24V low-voltage platforms, more than two low-voltage platform electrical loads will coexist in the same car. The automotive low-voltage power distribution system needs to solve the problem of safe power distribution of these loads on different voltage platforms.

[0003] The whole vehicle is powered by a unified low-voltage platform. When the working voltage range of the low-voltage load is inconsistent with the voltage of the low-voltage platform of the whole vehicle, the following three methods are generally used:

[0004] 1) The controller that drives the load has a preset voltage conversion module during development. When working, the controller directly drives the load, and the vehicle's low-voltage power supply system does not participate in the power supply and distribution of the load. The premise is that the controller itself must meet the working voltage level requirements of the unified low-voltage platform of the vehicle. However, this solution has the problem of increased vehicle cost and waste of resources due to the addition of internal voltage conversion modules in each controller.

[0005] 2) After converting the branch voltage according to the low-voltage load requirements, a power protection device different from the vehicle's low-voltage power distribution system is used to supply power and circuit protection to the load separately. However, the coexistence of loads on different voltage platforms causes incompatibility of power signals on the vehicle, increases the types of circuit protection components, increases the difficulty of vehicle control, and increases vehicle maintenance costs.

[0006] 3) Redevelop electrical loads that meet the corresponding working voltage level of the vehicle's low-voltage power supply / distribution system. However, this method increases the capital investment in the redevelopment and verification of components. Summary of the invention

[0007] The present application provides an intelligent power distribution box for an automobile, in which power modules of different voltage platforms that are independently controlled from each other are arranged on the same power distribution box, so as to realize independent power conversion and power supply, achieve compatibility of power signals of different voltage platforms, save circuit component resources, reduce component development and verification costs, and improve power safety and vehicle reliability through intelligent power distribution protection of vehicle lines.

[0008] The present application provides an intelligent power distribution box for a car, comprising a first power distribution assembly, the first power distribution assembly comprising a first power distribution box, a first power module and a second power module, the first power distribution box providing independent input channels and output channels for the first power module and the second power module;

[0009] The first power supply module is used to convert the power supply voltage of the third voltage of the new energy vehicle into the power supply of the first voltage, input it into the first distribution box through the first input channel, and supply power to the load of the voltage platform of the first voltage through the first output channel;

[0010] The second power supply module is used to convert the high-voltage power supply of the new energy vehicle into a power supply of a second voltage, input it into the first power distribution box through the second input channel, and supply power to the load of the voltage platform of the second voltage through the second output channel;

[0011] The third voltage is greater than the first voltage.

[0012] Preferably, the first power distribution component also includes a battery group of a first voltage and a battery group of a second voltage, the battery group of the first voltage and the first power module are redundant backups of each other, and the battery group of the second voltage and the second power module are redundant backups of each other.

[0013] Preferably, the first power distribution box includes a main control chip, and independent sampling / isolation circuits and independent intelligent bidirectional switches are respectively provided between the input channels of the first power module, the second power module, the first voltage battery pack and the second voltage battery pack and the main control chip.

[0014] Preferably, the main control chip communicates with the vehicle network in real time to monitor the temperature data of the power terminals of the first power module, the second power module, the battery pack of the first voltage and the battery pack of the second voltage.

[0015] Preferably, in a fault-free situation, the first power module charges the battery pack of the first voltage through the first power distribution box; and the second power module charges the battery pack of the second voltage through the first power distribution box.

[0016] Preferably, the load of each first voltage voltage platform is respectively connected to the first power supply module and the intelligent bidirectional switch of the first voltage battery pack in the first distribution box, and each load of the first voltage voltage platform has a first intelligent switch in the first distribution box, and a first pre-driver chip is provided between the first intelligent switch and the main control chip, and the first pre-driver chip drives the first intelligent switch to be turned on and off.

[0017] Preferably, the load of each second voltage voltage platform is connected to the second power supply module and the intelligent bidirectional switch of the second voltage battery pack in the first distribution box, and each load of the second voltage voltage platform has a second intelligent switch in the first distribution box, and a second pre-driver chip is provided between the second intelligent switch and the main control chip, and the second pre-driver chip drives the second intelligent switch to be turned on and off.

[0018] Preferably, the intelligent power distribution box of the automobile further comprises a second power distribution assembly, and the structure of the second power distribution assembly is the same as that of the first power distribution assembly;

[0019] The same load is connected to the first power distribution assembly and / or the second power distribution assembly.

[0020] Preferably, the main control chip calculates the loop current protection threshold of each load according to the electrical characteristics of each load, and performs current limiting / overcurrent control.

[0021] Preferably, when the remaining power of at least one of the first power module, the second power module, the first voltage battery pack and the second voltage battery pack is insufficient or faulty, the first distribution box executes a power warning mode and disconnects the intelligent switch of non-essential loads.

[0022] Other features and advantages of the present application will become apparent from the following detailed description of exemplary embodiments of the present application with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0024] Figure 1 A power distribution control block diagram of an embodiment of an intelligent power distribution box for a car provided in the present application;

[0025] Figure 2 A power distribution control block diagram of another embodiment of the intelligent power distribution box for a car provided in the present application. DETAILED DESCRIPTION

[0026] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that unless otherwise specifically stated, the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present application.

[0027] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the present application, its application, or uses.

[0028] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0029] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0030] The present application provides an intelligent power distribution box for a car, in which power modules of different voltage platforms that are independently controlled are arranged on the same power distribution box to realize independent power conversion and power supply, realize the compatibility of power signals of different voltage platforms, save circuit component resources, reduce the cost of component development and verification, and improve power safety and vehicle reliability through intelligent power distribution protection of vehicle lines. In addition, the present application reduces the energy consumption of the whole vehicle while ensuring safety by refining low-voltage power management and intelligently controlling the power supply timing of the whole vehicle.

[0031] like Figure 1 As shown, the intelligent power distribution box of the automobile provided in the present application includes a first power distribution component, the first power distribution component includes a first power distribution box, a first power module DC / DC1 and a second power module DC / DC2, and the first power distribution box provides independent input channels and output channels for the first power module DC / DC1 and the second power module DC / DC2.

[0032] The first power module DC / DC1 is used to convert the power supply voltage of the third voltage of the new energy vehicle into the power supply of the first voltage, input it into the first distribution box through the first input channel, and supply power to the load of the voltage platform of the first voltage through the first output channel. The third voltage is greater than the first voltage.

[0033] The second power supply module DC / DC2 is used to convert the high-voltage power supply of the new energy vehicle into a power supply of a second voltage, input it into the first distribution box through the second input channel, and power the load of the voltage platform of the second voltage through the second output channel.

[0034] Preferably, the first power distribution component also includes a battery pack of a first voltage and a battery pack of a second voltage, the battery pack of the first voltage and the first power module DC / DC1 serve as redundant backups for each other, and the battery pack of the second voltage and the second power module DC / DC2 serve as redundant backups for each other, to supply power for the low-voltage load of the entire vehicle.

[0035] Figure 1 An embodiment of an intelligent power distribution box for a car is shown, wherein the first voltage is 12V and the second voltage is 24V. The first power module DC / DC1 is used to convert the 24V power supply voltage of the new energy car into a 12V power supply, and the second power module DC / DC2 is used to convert the high voltage power supply of the new energy car into a 24V power supply. The battery pack of the first voltage is a 12V battery pack, and the battery pack of the second voltage is a 24V battery pack.

[0036] As another embodiment, the first voltage is 12V and the second voltage is 48V, which can meet the power supply requirements of the load combination of two working voltage platforms of 12V and 48V on the same vehicle.

[0037] As another embodiment, the first voltage is 24V and the second voltage is 48V, which can meet the power supply requirements of the load combination of two working voltage platforms of 24V and 48V on the same vehicle.

[0038] It can be understood that the first voltage and the second voltage of the present application can also be other combinations. Such an intelligent distribution box can meet the combined power supply of loads with different voltage platforms.

[0039] Specifically, Figure 1 As shown, the first power distribution box includes a main control chip, and independent sampling / isolation circuits and independent intelligent bidirectional switches are respectively provided between the input channels of the first power module DC / DC1, the second power module DC / DC2, the battery pack of the first voltage and the battery pack of the second voltage and the main control chip. By controlling the opening and closing of the intelligent bidirectional switch, the first power module DC / DC1, the second power module DC / DC2, the battery pack of the first voltage and the battery pack of the second voltage can be controlled to enter and exit the intelligent power distribution box, thereby realizing single-channel on-off isolation.

[0040] The main control chip communicates with the vehicle network in real time, and is used to monitor the temperature data of the power terminals of the first power module DC / DC1, the second power module DC / DC2, the first voltage battery pack and the second voltage battery pack, and control the connection / disconnection of each of them individually according to the preset program when necessary.

[0041] like Figure 1 As shown, each load selects the corresponding power output interface according to its own working voltage requirements and is connected to the intelligent power distribution box through a wiring harness. The main control chip calculates the loop current protection threshold of the load according to the electrical characteristics of each load, and performs current limiting / overcurrent control. Specifically, the circuit protection threshold of each branch is programmed for the main control chip of the intelligent power distribution control box according to the electrical characteristics of the load under the branch. For example, the loop current protection threshold is calculated through the peak power, working voltage range, working time of the peak power of the load, etc., and current limiting / overcurrent control is performed, thereby realizing intelligent power distribution suitable for loads with different power and different working voltage platforms.

[0042] The loads of each voltage platform of the first voltage are respectively connected to the first power module and the intelligent bidirectional switch of the first voltage battery pack in the first distribution box, and each load of the voltage platform of the first voltage has a first intelligent switch in the first distribution box, and a first pre-driver chip is provided between the first intelligent switch and the main control chip, and the first pre-driver chip drives the opening and closing of the first intelligent switch. Specifically, the first pre-driver chip monitors the electrical data such as the voltage / current / resistance / temperature of the branch in real time, and the collected information is sent to the main control chip of the intelligent distribution box, and the calculation and decision are made according to a predetermined program. The first pre-driver chip drives the opening / closing of the first intelligent switch, thereby realizing the opening / closing control of the power supply of each load branch, overvoltage / overcurrent / overtemperature / circuit break detection, etc. When a load branch fails or short-circuits, the first pre-driver chip is linked with the main control chip, and the branch power supply is promptly disconnected through the first intelligent switch to ensure that the power supply voltage of other branches will not be lowered, and the loss caused by the failure of a single branch load circuit is reduced.

[0043] The load of each second voltage voltage platform is connected to the second power module and the intelligent bidirectional switch of the second voltage battery pack in the first distribution box, and each load of the second voltage voltage platform has a second intelligent switch in the first distribution box, and a second pre-driver chip is provided between the second intelligent switch and the main control chip, and the second pre-driver chip drives the second intelligent switch to be turned on and off. The working principle of the second pre-driver chip and the second intelligent switch is the same as the working principle of the first pre-driver chip and the first intelligent switch.

[0044] In a fault-free situation, the first power module DC / DC1 charges the battery pack of the first voltage through the first power distribution box; the second power module DC / DC2 charges the battery pack of the second voltage through the first power distribution box.

[0045] Preferably, when the remaining power of at least one of the first power module, the second power module, the battery pack of the first voltage, and the battery pack of the second voltage is insufficient or fails, the first power distribution box executes the power warning mode and disconnects the intelligent switch of the non-essential load. Specifically, the power distribution box obtains relevant data through the vehicle network, makes judgments according to preset logic, executes the power warning mode, and disconnects the power supply branch of the non-essential power load (such as comfort load) to extend the vehicle's safe driving system time.

[0046] On the basis of the above, preferably, the intelligent power distribution box of the automobile further includes a second power distribution component, and the structure of the second power distribution component is the same as that of the first power distribution component, such as Figure 2As shown. The same load is connected to the first power distribution component and / or the second power distribution component. When the vehicle is equipped with more than two power distribution components, they can be distributed according to the load function, and one of them can be selected to be connected, or both distribution boxes can be connected at the same time. For example, vehicle driving safety electrical loads such as autonomous driving, brake-by-wire / steering systems can be connected to two distribution boxes at the same time. When any of the distribution boxes fails, the other distribution box can ensure the normal power supply of the load under it; similarly, when any power input channel of DC / DC1, DC / DC2, the first voltage battery pack, or the second voltage battery pack fails, another power channel of the same voltage platform as a backup can still ensure the power supply of driving safety loads, at least for a certain period of time, thereby achieving the safety goal of low-voltage power management of vehicles in the L3 and above autonomous driving stages.

[0047] This application is used for an automotive low-voltage intelligent power distribution control system composed of electrical appliances of two voltage platforms, supports the realization of redundant power distribution of vehicles composed of electrical appliances of different voltage platforms in the L3 and above autonomous driving stages, and can also be used in conventional automotive intelligent power distribution control scenarios.

[0048] Although some specific embodiments of the present application have been described in detail by way of example, it should be understood by those skilled in the art that the above examples are only for illustration, not for limiting the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. An intelligent power distribution box for a car, characterized in that: The first power distribution assembly includes a first power distribution box, a first power module and a second power module, and the first power distribution box provides independent input channels and output channels for the first power module and the second power module; The first power supply module is used to convert the power supply voltage of the third voltage of the new energy vehicle into the power supply of the first voltage, input it into the first distribution box through the first input channel, and supply power to the load of the voltage platform of the first voltage through the first output channel; The second power module is used to convert the high-voltage power supply of the new energy vehicle into a power supply of a second voltage, input it into the first distribution box through a second input channel, and supply power to a load of a voltage platform of the second voltage through a second output channel; Wherein, the third voltage is greater than the first voltage.

2. The intelligent power distribution box for a car according to claim 1, characterized in that: The first power distribution component also includes a battery group of a first voltage and a battery group of a second voltage. The battery group of the first voltage and the first power module serve as redundant backups for each other, and the battery group of the second voltage and the second power module serve as redundant backups for each other.

3. The intelligent power distribution box for a car according to claim 2, characterized in that: The first power distribution box includes a main control chip, and independent sampling / isolation circuits and independent intelligent bidirectional switches are respectively provided between the input channels of the first power module, the second power module, the first voltage battery pack and the second voltage battery pack and the main control chip.

4. The intelligent power distribution box for a car according to claim 3, characterized in that: The main control chip communicates with the vehicle network in real time and is used to monitor the temperature data of the power terminals of the first power module, the second power module, the battery pack of the first voltage and the battery pack of the second voltage.

5. The intelligent power distribution box for a car according to claim 2, characterized in that: In a fault-free situation, the first power module charges the battery pack of the first voltage through the first power distribution box; and the second power module charges the battery pack of the second voltage through the first power distribution box.

6. The intelligent power distribution box for a car according to claim 3, characterized in that: The loads of each first voltage voltage platform are respectively connected to the first power supply module and the intelligent bidirectional switch of the first voltage battery pack in the first distribution box, and each first voltage voltage platform load has a first intelligent switch in the first distribution box, and a first pre-driver chip is provided between the first intelligent switch and the main control chip, and the first pre-driver chip drives the first intelligent switch to be turned on and off.

7. The intelligent power distribution box for a car according to claim 6, characterized in that: The load of each second voltage voltage platform is connected to the second power supply module and the intelligent bidirectional switch of the second voltage battery pack in the first distribution box, and each second voltage voltage platform load has a second intelligent switch in the first distribution box, and a second pre-driver chip is provided between the second intelligent switch and the main control chip, and the second pre-driver chip drives the second intelligent switch to be turned on and off.

8. The intelligent power distribution box for a car according to claim 3, characterized in that: The main control chip calculates the loop current protection threshold of each load according to the electrical characteristics of the load and performs current limiting / overcurrent control.

9. The intelligent power distribution box for a car according to claim 3, characterized in that: When the remaining power of at least one of the first power module, the second power module, the first voltage battery pack and the second voltage battery pack is insufficient or faulty, the first distribution box executes a power warning mode and disconnects the intelligent switch of non-essential loads.

Images