Vehicle power supply system and vehicle power supply system detection method

Abstract

The invention discloses a vehicle power supply system, which relates to the field of vehicle power supplies and comprises a power supply module, a switch module and a load module, the power supply module comprises a DC / DC module and a storage battery module; the switch module comprises a first switch module, a second switch module and a third switch module; the load modules comprise a first load module, a second load module, a third load module and a fourth load module; the power module is connected with the load module through the switch module. Wherein the storage battery module generates a second load module according to the charging state of the DC / DC module on the storage battery module. According to the scheme, the power supply state of the first load can be detected and recognized through periodic on-off of the switch, and detection of the power supply loop is completed on the premise that normal work of the first load is not affected. After the DC / DC power supply module is abnormal, the power supply loop of the first load is checked, and the situation that part of the power supply loop is damaged due to the abnormality of the DC / DC power supply module and cannot be found in time is prevented.

Description

Technical Field

[0001] The present application relates to the field of vehicle power supply, and in particular to a vehicle power supply system, a vehicle power supply system setting method, a vehicle power supply system control method, a vehicle power supply system detection method, a vehicle power supply system setting device, a vehicle power supply system control device, a vehicle power supply system detection device, an electronic device, a storage medium and a vehicle. Background Art

[0002] With the popularization of new energy commercial vehicles and unmanned driving, informatization and intelligence have become typical technical features, and their electrical architecture and control logic have become more complex and huge.

[0003] For new energy vehicles, the low-voltage battery and DC / DC are connected in parallel and serve as the input of the low-voltage power distribution system. There is no detection and shutdown device between the three. If the DC / DC abnormally outputs too high a voltage, it will cause the low-voltage battery to be overcharged, which will damage the chemical stability of the low-voltage battery for a long time, affect its life, and damage the low-voltage power distribution system and controller. If the DC / DC abnormally has no power output, the low-voltage system of the vehicle is powered by the low-voltage battery, but the battery capacity is usually too small to support multiple loads for a long time, causing the vehicle to be unable to continue driving.

[0004] Although redundant power supply improves the reliability of the entire vehicle, the existing power distribution system relies on traditional fuse boxes, most of which are PCB board structures. Current is transmitted through copper bars, and circuit protection and circuit control are performed through fuses and relays. This centralized power distribution method causes the wires to be too long and the weight of the vehicle wiring harness to increase, which cannot adapt to the regional architecture of the vehicle.

[0005] For example, patent CN118457475A (publication date 20240809) discloses an intelligent power distribution system, which uses two distribution boxes to complete power distribution in multiple modes. However, it uses traditional fuses and relays, and the distribution box has a single function, which cannot monitor the current size and control the current under complex strategies, and cannot adapt to the regional architecture of the whole vehicle.

[0006] For example, patent CN117246265A (publication date 20231219) discloses a regional power distribution method, which realizes the local power distribution of the whole vehicle electrical appliances. However, its power distribution system can only protect the load and cannot perform logical control related to the vehicle body domain controller.

[0007] Therefore, a solution for a vehicle power supply system is needed to give full play to the reliability of power supply redundancy and detect and evaluate the redundant power supply when the DC / DC output is abnormal. Summary of the invention

[0008] The object of the present invention is to provide a vehicle power supply system, a vehicle power supply system control method, a vehicle power supply system control device, an electronic device, a storage medium and a vehicle, which at least solve the problem of fully utilizing the reliability of power supply redundancy and solve one technical problem in the problem of redundant power supply detection and evaluation when DC / DC output is abnormal.

[0009] The present invention provides the following scheme:

[0010] According to one aspect of the present invention, there is provided a vehicle power supply system, the vehicle power supply system comprising:

[0011] Power modules, switch modules and load modules;

[0012] The power module includes a DC / DC module and a battery module;

[0013] The switch module includes a first switch module, a second switch module and a third switch module;

[0014] The load modules include a first load module, a second load module, a third load module and a fourth load module;

[0015] The power module is connected to the load module via the switch module;

[0016] According to the state of charging the battery module by the DC / DC module, the battery module generates the second load module.

[0017] Furthermore, the power module is connected to the load module via the switch module, including:

[0018] The first switch module is provided with a main power supply circuit and a backup power supply circuit;

[0019] The discharge circuit of the DC / DC module is connected to the main power supply circuit of the first load module and the power supply circuit of the third load module through the first switch module;

[0020] The discharge circuit of the DC / DC module is connected to the backup power supply circuit of the first load module and the power supply circuit of the fourth load module through the series circuit of the first switch module and the third switch module;

[0021] The discharge circuit of the DC / DC module is connected to the charge and discharge circuit of the battery module through the series circuit of the first switch module, the third switch module and the second switch module;

[0022] According to the first switch module, the third switch module and the second switch module being in the on state, the DC / DC module enters the state of charging the battery module, and the battery module generates the second load module.

[0023] Furthermore, it also includes: a control module;

[0024] The control module is used to collect status information of the power module, the load module and the switch module, and to control the working status of the switch module;

[0025] Wherein, the control module controls the on-off state of the switch module according to the voltage state of the DC / DC module and / or the battery module;

[0026] Wherein, according to the on-off state of the control switch module, the health state of the main power supply circuit and / or the backup power supply circuit of the first load module is detected.

[0027] According to two aspects of the present invention, a vehicle power supply system setting method is provided, the vehicle power supply system setting method comprising:

[0028] Obtain vehicle operation mode information;

[0029] The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information;

[0030] The first operation mode information includes controlling the vehicle to drive safely according to the normal state of the DC / DC module and the normal state of the battery module;

[0031] The second operation mode information includes controlling the vehicle to pull over to a side of the road according to a state in which the DC / DC module is abnormal and the battery module is normal;

[0032] The third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

[0033] Furthermore, it also includes:

[0034] classifying vehicle load according to the vehicle operation mode information;

[0035] The vehicle load classification includes that the vehicle load is divided into a first load module, a second load module, a third load module and a fourth load module;

[0036] Wherein, the first load module includes a main power supply circuit and a backup power supply circuit;

[0037] Wherein, the third load module and the fourth load module include a power supply circuit;

[0038] The second load module includes: the battery module generates the second load module according to the charging state of the battery module.

[0039] Furthermore, the vehicle load classification according to the vehicle operation mode information further includes:

[0040] In the second operation mode, the charging and discharging circuits of the battery module are connected to the backup power supply circuit of the first load module and the power supply circuit of the third load module, and the discharge circuit of the DC / DC module is disconnected from the vehicle load;

[0041] In the third operation mode, the discharge circuit of the DC / DC module is connected to the main power supply circuit of the first load module and the power supply circuit of the fourth load module, and the connection between the charging and discharging circuits of the battery module and the vehicle load is disconnected;

[0042] In the first operation mode, the discharge circuit of the DC / DC module and / or the charge and discharge circuit of the battery module are connected to the power supply circuits of the first load module, the third load module and the fourth load module.

[0043] According to three aspects of the present invention, a vehicle power supply system control method is provided, the vehicle power supply system control method comprising:

[0044] Get vehicle status information;

[0045] The vehicle status information includes status information of a power module;

[0046] The status information of the power module includes health status information of the battery module or the DC / DC module;

[0047] If the DC / DC module is normal and the battery module is normal, the vehicle is controlled to operate in the first operating mode;

[0048] If the DC / DC module is abnormal and the battery module is normal, the vehicle is controlled to operate in the second operating mode;

[0049] If the DC / DC module is normal and the battery module is abnormal, the vehicle is controlled to operate in the third operating mode.

[0050] Furthermore, the vehicle status information also includes the status information of the load module:

[0051] Detecting whether the power supply circuit states of the first load module, the second load module, the third load module and / or the fourth load module are normal;

[0052] If the voltage state of the charging and discharging circuits of the battery module connected to the backup power supply circuit of the first load module and the power supply circuit of the third load module is normal, and the discharge circuit of the DC / DC module is disconnected from the vehicle load, the vehicle is allowed to be controlled to operate in the second operating mode;

[0053] If the voltage state of the discharge circuit of the DC / DC module connected to the main power supply circuit of the first load module and the power supply circuit of the fourth load module is normal, and the connection between the charging and discharging circuits of the battery module and the vehicle load is disconnected, the vehicle is allowed to be controlled to operate in the third operating mode;

[0054] If it is detected that the voltage state of the discharge circuit of the DC / DC module connected to the power supply circuit of the first load module, the second load module, the third load module and the fourth load module is normal, the vehicle is allowed to be controlled to operate in the first operating mode.

[0055] According to four aspects of the present invention, a vehicle power supply system detection method is provided, the vehicle power supply system detection method comprising:

[0056] Obtain information about vehicle operating modes;

[0057] According to the current vehicle operation mode, control the on / off state of the switch module;

[0058] According to the on / off state of the switch module, voltage state information of the power supply circuits of the first load module, the third load module and / or the fourth load module is collected;

[0059] The health status of the vehicle power supply system is detected according to the correspondence between the on-off state of the switch module and the voltage state of the power supply circuit.

[0060] Further, the detecting the health status of the vehicle power supply system according to the correspondence between the on / off status of the switch module and the voltage status of the power supply circuit includes:

[0061] When the vehicle is running in the second operating mode, the first switch module is opened and the second switch module and the third switch module are closed;

[0062] Controlling the third switch module to be disconnected periodically, and corresponding to the periodic state of the third switch module being disconnected, respectively collecting the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module;

[0063] When the third switch module is in the disconnected state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are both zero;

[0064] If yes, when the third switch module is restored to the closed state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are restored to normal voltage values;

[0065] If yes, then data indicating that the vehicle power supply system is supplying power normally in the third operating mode is output.

[0066] Further, the detecting the state of the vehicle power supply system according to the correspondence between the on-off state of the switch module and the voltage state of the power supply circuit also includes:

[0067] When the vehicle is running in the third operating mode, the second switch module is disconnected and the first switch module and the third switch module are closed;

[0068] Controlling the third switch module to be disconnected periodically, and corresponding to the periodic state of the third switch module being disconnected, respectively collecting the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module;

[0069] When the third switch module is in the disconnected state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are both zero;

[0070] If yes, when the third switch module is restored to the closed state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are restored to normal voltage values;

[0071] If yes, data indicating that the vehicle power supply system is normally powered in the second operating mode is output.

[0072] Further, the detecting the state of the vehicle power supply system according to the correspondence between the on-off state of the switch module and the voltage state of the power supply circuit also includes:

[0073] When the vehicle is operating in the first operating mode, the second switch module, the second switch module and the third switch module are closed;

[0074] Control the third switch module and the first switch module to be disconnected synchronously and periodically, and corresponding to the periodic state of the third switch module and the first switch module being disconnected synchronously, respectively collect the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module;

[0075] When the third switch module and the first switch module are in a synchronous disconnected state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are both zero;

[0076] If yes, when the third switch module and the first switch module are synchronously restored to the closed state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are restored to normal voltage values;

[0077] If yes, then control the third switch module and the second switch module to be disconnected synchronously and periodically, and corresponding to the periodic state of the third switch module and the second switch module being disconnected synchronously, respectively collect the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module;

[0078] When the third switch module and the second switch module are in a synchronous disconnected state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are both zero;

[0079] If yes, when the third switch module and the second switch module are synchronously restored to the closed state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are restored to normal voltage values;

[0080] If yes, data indicating that the vehicle power supply system is normally powered in the first operating mode is output.

[0081] Furthermore, it is characterized in that it also includes:

[0082] Get information about the vehicle's current operating mode;

[0083] If the vehicle is currently in the first operating mode, then monitoring the status information of the power module, including status information that the DC / DC module is abnormal and the battery module is normal;

[0084] The vehicle switches to the second operation mode according to the status information that the DC / DC module is abnormal and the battery module is normal;

[0085] Capture vehicle zero-speed status information;

[0086] According to capturing the zero-speed state of the vehicle, the vehicle starts a power supply self-detection of the vehicle power supply system corresponding to the second operation mode;

[0087] If,the test is successful, a self-test report is generated and the information of,the vehicle maintenance record is captured;

[0088] If, the record information of vehicle maintenance completion is captured, the vehicle starts the vehicle power supply system power supply self-detection corresponding to the first operation mode;

[0089] If the detection is successful, the normal status information of the DC / DC module and the battery module is output, and the first operation mode is switched.

[0090] Furthermore, it is characterized in that it also includes:

[0091] Get information about the vehicle's current operating mode;

[0092] If the vehicle is currently in the first operating mode, then monitoring the status information of the power module, including the status information that the DC / DC module is normal and the battery module is abnormal;

[0093] The vehicle switches to a third operation mode according to the status information that the DC / DC module is normal and the battery module is abnormal;

[0094] Capture vehicle zero-speed status information;

[0095] According to capturing the zero-speed state of the vehicle, the vehicle starts a power supply self-detection of the vehicle power supply system corresponding to the third operation mode;

[0096] If,the test is successful, a self-test report is generated and the information of,the vehicle maintenance record is captured;

[0097] If, the record information of vehicle maintenance completion is captured, the vehicle starts the vehicle power supply system power supply self-detection corresponding to the first operation mode;

[0098] If the detection is successful, the normal status information of the DC / DC module and the battery module is output, and the first operation mode is switched.

[0099] According to five aspects of the present invention, a vehicle power supply system setting device is provided, the vehicle power supply system setting device comprising:

[0100] A mode information module is used to obtain vehicle operation mode information;

[0101] The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information;

[0102] The first operation mode information includes controlling the vehicle to drive safely according to the normal state of the DC / DC module and the normal state of the battery module;

[0103] The second operation mode information includes controlling the vehicle to pull over to a side of the road according to a state in which the DC / DC module is abnormal and the battery module is normal;

[0104] The third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

[0105] According to a sixth aspect of the present invention, there is provided a vehicle power supply system control device, the vehicle power supply system control device comprising:

[0106] Vehicle status module, used to obtain vehicle status information;

[0107] The vehicle status information includes status information of a power module;

[0108] The status information of the power module includes health status information of the battery module or the DC / DC module;

[0109] If the DC / DC module is normal and the battery module is normal, the vehicle is controlled to operate in the first operating mode;

[0110] If the DC / DC module is abnormal and the battery module is normal, the vehicle is controlled to operate in the second operating mode;

[0111] If the DC / DC module is normal and the battery module is abnormal, the vehicle is controlled to operate in the third operating mode.

[0112] According to a seventh aspect of the present invention, a vehicle power supply system detection device is provided, the vehicle power supply system detection device comprising:

[0113] A vehicle operation module, used to obtain information about the vehicle operation mode;

[0114] A switch control module, used to control the conduction state of the switch module according to the current vehicle operation mode;

[0115] A loop voltage module, used to collect voltage status information of the power supply loop of the first load module, the third load module and / or the fourth load module according to the conduction state of the switch module;

[0116] The system detection module is used to detect the health status of the vehicle power supply system according to the corresponding state of the conduction state of the switch module and the voltage state of the power supply circuit.

[0117] According to an eighth aspect of the present invention, there is provided an electronic device, comprising: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus;

[0118] A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method.

[0119] According to a ninth aspect of the present invention, a computer-readable storage medium is provided, which stores a computer program executable by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method, or / and the steps of the vehicle power supply system detection method.

[0120] According to a tenth aspect of the present invention, there is provided a vehicle, comprising:

[0121] An electronic device, used to implement the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method, or / and the steps of the vehicle power supply system detection method;

[0122] A processor, the processor runs a program, and when the program runs, the data output from the electronic device executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method, or / and the steps of the vehicle power supply system detection method;

[0123] The storage medium is used to store a program, which, when running, executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method for data output from the electronic device.

[0124] Through the above scheme, the following beneficial technical effects are obtained:

[0125] The present application detects and identifies the power supply status of the first load by periodically turning the switch on and off, and completes the detection of the power supply circuit without affecting the normal operation of the first load.

[0126] The present application checks the power supply circuit of the first load after the DC / DC power supply module becomes abnormal, thereby preventing the failure to timely discover the damage to part of the power supply circuit due to the abnormality of the DC / DC power supply module.

[0127] The present application ensures that the power supply circuit of the first load is always in a more reliable power supply state by regularly detecting the main and backup power supply circuits. BRIEF DESCRIPTION OF THE DRAWINGS

[0128] Figure 1 is a structural diagram of a vehicle power supply system provided by one or more embodiments of the present invention.

[0129] Figure 2 is a flow chart of a vehicle power supply system setting method provided by one or more embodiments of the present invention.

[0130] Figure 3 is a flow chart of a vehicle power supply system control method provided by one or more embodiments of the present invention.

[0131] Figure 4 It is a flow chart of a vehicle power supply system detection method provided by one or more embodiments of the present invention.

[0132] Figure 5 It is a structural diagram of a vehicle power supply system setting device provided by one or more embodiments of the present invention.

[0133] Figure 6 is a structural diagram of a vehicle power supply system control device provided by one or more embodiments of the present invention.

[0134] Figure 7 It is a structural diagram of a vehicle power supply system detection device provided by one or more embodiments of the present invention.

[0135] Figure 8 A schematic diagram of the connection topology of a low-voltage intelligent power distribution system according to a specific embodiment of the present invention.

[0136] Fig. 9A schematic diagram of the structure of an intelligent power distribution controller according to a specific embodiment of the present invention.

[0137] Fig.10 A structural block diagram of an electronic device of a vehicle power system control method provided by one or more embodiments of the present invention.

[0138] Figure numbers: 21, DC / DC power input terminal; 22, low-voltage battery power input terminal; 23, low-voltage battery charging terminal; 52, battery output terminal; 51, DC / DC output terminal. DETAILED DESCRIPTION

[0139] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0140] Figure 1 is a structural diagram of a vehicle power supply system provided by one or more embodiments of the present invention.

[0141] like Figure 1 The vehicle power supply system shown includes:

[0142] Power modules, switch modules and load modules;

[0143] The power module includes a DC / DC module and a battery module;

[0144] The switch module includes a first switch module, a second switch module and a third switch module;

[0145] The load modules include a first load module, a second load module, a third load module and a fourth load module;

[0146] The power module is connected to the load module via the switch module;

[0147] According to the state of charging the battery module by the DC / DC module, the battery module generates the second load module.

[0148] Specifically, in this embodiment, the output side of the DC / DC module is connected to the vehicle load, and the input side of the DC / DC module is connected to the charging gun, internal combustion engine, etc. The DC / DC module mainly plays the role of converting high voltage electricity from the charging gun, internal combustion engine, etc. into low voltage electricity. The DC / DC module is regarded as a "power source" and participates in the power supply to the load.

[0149] The power module includes a DC / DC module and a battery module, and the load module includes a first load module, a second load module, a third load module and a fourth load module. The line connection between the power module and the load module is controlled by the switch module to form different loop styles corresponding to different vehicle operating modes.

[0150] The DC / DC module can not only supply power to the first load module, the third load module and the fourth load module, but also charge the battery module. When the battery module is charging, it cannot fully function as a power source and can be regarded as a second load module powered by the DC / DC module.

[0151] The switch module also includes a fourth switch module; the fourth switch module includes a normally open point, a normally closed point and a common point; the common point is located at the third or fourth load module, and the normally open point or the normally closed point is respectively located at the backup power supply circuit and the main power supply circuit of the first load module. The third load module can be converted to the fourth load module, or the fourth load module can be converted to the third load module according to the operation strategy of the operation mode of the vehicle.

[0152] In this embodiment, the power module is connected to the load module via the switch module, including:

[0153] The first switch module is provided with a main power supply circuit and a backup power supply circuit;

[0154] The discharge circuit of the DC / DC module is connected to the main power supply circuit of the first load module and the power supply circuit of the third load module through the first switch module;

[0155] The discharge circuit of the DC / DC module is connected to the backup power supply circuit of the first load module and the power supply circuit of the fourth load module through the series circuit of the first switch module and the third switch module;

[0156] The discharge circuit of the DC / DC module is connected to the charge and discharge circuit of the battery module through the series circuit of the first switch module, the third switch module and the second switch module;

[0157] According to the first switch module, the third switch module and the second switch module being in the on state, the DC / DC module enters the state of charging the battery module, and the battery module generates the second load module.

[0158] Specifically, in accordance with the design requirements of vehicle safety redundancy, the first load module has one more backup power supply circuit than the fourth load module or the third load module; the battery module acts as the second load module in the charging working mode, and the charging and discharging circuits are used as power supply circuits at the same time.

[0159] In this embodiment, it also includes: a control module;

[0160] A control module is used to collect status information of the power module, the load module and the switch module, and to control the working status of the switch module;

[0161] Wherein, the control module controls the on-off state of the switch module according to the voltage state of the DC / DC module and / or the battery module;

[0162] Wherein, according to the on-off state of the control switch module, the health state of the main power supply circuit and / or the backup power supply circuit of the first load module is detected.

[0163] Specifically, in order to ensure the safety level of the vehicle, the health status of the power supply circuit of the first load module needs to be monitored, that is, to ensure the continuous power supply of the first load module as much as possible. A power supply circuit is temporarily disconnected and its voltage is detected to identify the health status of the power supply circuit. For example, in the corresponding disconnection and connection cycle, the voltage on the power supply circuit drops to zero and the voltage returns to normal. At the same time, it is detected whether the working status of the first load is affected.

[0164] Figure 2 is a flow chart of a vehicle power supply system setting method provided by one or more embodiments of the present invention.

[0165] like Figure 2 The vehicle power supply system setting method shown includes:

[0166] Step S1, obtaining vehicle operation mode information;

[0167] The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information;

[0168] Step S1.1, the first operation mode information includes controlling the vehicle to drive safely according to the normal status of the DC / DC module and the normal status of the battery module;

[0169] Step S1.2, the second operation mode information includes controlling the vehicle to pull over according to the state that the DC / DC module is abnormal and the battery module is normal;

[0170] Step S1.3, the third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

[0171] Specifically, different operation strategies are adopted for different health states of power modules, which are manifested as different operation modes. For example, if the DC / DC module is abnormal and the battery module is normal, the battery module loses the channel for replenishing energy storage, and the vehicle cannot maintain a long range. It is necessary to try to maintain the energy storage of the battery, and adopt the strategy of pulling over and waiting for rescue. For example, if the DC / DC module is normal and the battery module is abnormal, the engine is burdened with a heavy load due to the lack of assistance from the battery module, and a strategy of speed limit driving is adopted. The second and third operation modes are equivalent to the vehicle "limping" to varying degrees.

[0172] In this embodiment, it also includes:

[0173] Vehicle load classification based on vehicle operation mode information;

[0174] The vehicle load classification includes that the vehicle load is divided into a first load module, a second load module, a third load module and a fourth load module;

[0175] Wherein, the first load module includes a main power supply circuit and a backup power supply circuit;

[0176] Wherein, the third load module and the fourth load module include a power supply circuit;

[0177] The second load module includes: the battery module generates the second load module according to the charging state of the battery module.

[0178] Specifically, in order to achieve the purpose of vehicle "limp home", it is necessary to simplify the functional "unimportant" loads or loads that do not affect vehicle safety. First, the vehicle loads are classified, for example, the loads necessary for vehicle "limp home" are classified as the first load module, and the loads that are highly correlated but do not affect "limp home" safety in the second and third operating modes are classified as the third and fourth load modules.

[0179] In this embodiment, vehicle load classification also includes:

[0180] In the second operation mode, the charging and discharging circuits of the battery module are connected to the backup power supply circuit of the first load module and the power supply circuit of the third load module, and the discharge circuit of the DC / DC module is disconnected from the vehicle load;

[0181] In the third operation mode, the discharge circuit of the DC / DC module is connected to the main power supply circuit of the first load module and the power supply circuit of the fourth load module, and the connection between the charging and discharging circuits of the battery module and the vehicle load is disconnected;

[0182] In the first operation mode, the discharge circuit of the DC / DC module and / or the charge and discharge circuit of the battery module are connected to the power supply circuits of the first load module, the third load module and the fourth load module.

[0183] Specifically, through the connection of the switch module, the power supply status of the load is controlled in the corresponding vehicle operation mode.

[0184] Figure 3 is a flow chart of a vehicle power supply system control method provided by one or more embodiments of the present invention.

[0185] like Figure 3 The vehicle power supply system control method shown includes:

[0186] Step S2, obtaining vehicle status information;

[0187] The vehicle status information includes the status information of the power module;

[0188] The status information of the power module includes the health status information of the battery module or the DC / DC module;

[0189] Step S2.1: If the DC / DC module is normal and the battery module is normal, control the vehicle to operate in the first operating mode;

[0190] Step S2.2: If the DC / DC module is abnormal and the battery module is normal, control the vehicle to operate in the second operating mode;

[0191] Step S2.3: If the DC / DC module is normal and the battery module is abnormal, control the vehicle to operate in the third operating mode.

[0192] Specifically, different operation modes are adopted according to the health status of the battery module or the DC / DC module. This includes, corresponding to different operation modes, controlling the power supply of the power supply circuit through the switch module, such as "isolating" the abnormal DC / DC module or battery module from the power supply circuit; for example, when only the DC / DC module or the battery module is left, adopting a suitable "limp home" strategy; for example, corresponding to the "limp home" strategy, supplying power to the first load module, and the third load module or the fourth load module.

[0193] In this embodiment, the vehicle status information also includes the status information of the load module:

[0194] Detecting whether the power supply circuit states of the first load module, the second load module, the third load module and / or the fourth load module are normal;

[0195] If the voltage state of the charging and discharging circuits of the battery module connected to the backup power supply circuit of the first load module and the power supply circuit of the third load module is normal, and the discharge circuit of the DC / DC module is disconnected from the vehicle load, the vehicle is allowed to be controlled to operate in the second operating mode;

[0196] If the voltage state of the discharge circuit of the DC / DC module connected to the main power supply circuit of the first load module and the power supply circuit of the fourth load module is normal, and the connection between the charging and discharging circuits of the battery module and the vehicle load is disconnected, the vehicle is allowed to be controlled to operate in the third operating mode;

[0197] If it is detected that the voltage state of the discharge circuit of the DC / DC module connected to the power supply circuit of the first load module, the second load module, the third load module and the fourth load module is normal, the vehicle is allowed to be controlled to operate in the first operating mode.

[0198] Specifically, in the first operating mode, there is a state where only the DC / DC module or the battery module is supplying power, but the DC / DC module or the battery module is in a healthy state, and there is no need to control the vehicle to operate in the second operating mode or the third operating mode, that is, the health status of the power supply, circuit, etc. in the first operating mode is met, and the requirements for operation in the second operating mode or the third operating mode are also met.

[0199] The switch module controls the connection of the power supply circuit according to the instruction requirements. If the health status of the power supply, circuit, etc. under the current power supply circuit state is detected to meet the corresponding operation mode requirements, it is allowed to operate in this operation mode. That is, if the vehicle is allowed to operate in the first operation mode, it must be allowed to operate in the second operation mode and the third operation mode. However, if the vehicle is allowed to operate in the second operation mode and the third operation mode, it may not be allowed to operate in the first operation mode due to the health status of the power supply.

[0200] Allowing the vehicle to operate in the second operating mode, the third operating mode, or the first operating mode means allowing the vehicle to operate according to the preset strategies of controlling the vehicle to park on the side of the road, controlling the vehicle to drive at a limited speed, or controlling the vehicle to drive safely. To obtain "permission", it is first necessary to ensure that the voltage module in the "abnormal" state is "isolated" from the power supply circuit through the switch module.

[0201] After the vehicle switches from the first operation mode to the second operation mode or the third operation mode, it needs to find an opportunity to perform a self-test of the power supply circuit, or when switching back to the first operation mode, it still needs to perform a self-test of the power supply circuit. The self-test items include whether the power supply circuit is normal, whether the sensor monitoring the power supply circuit is normal (about power supply), whether the load on the power supply circuit is normal (about power supply), etc.

[0202] "Finding the opportunity" includes finding the opportunity to switch from the first operating mode to the second operating mode, first disconnecting the first switch module, then parking the vehicle on the roadside, and finally starting the detection of the main power supply circuit of the first load module and the power supply circuit of the third load module; the detection process includes periodically turning on and off the third switch module, observing whether the voltage of the main power supply circuit of the first load module fluctuates with the turning on and off of the third switch module, observing whether the first load module and the third load module are turned off and started by the turning on and off of the third switch module, and observing whether the sensor on the power supply circuit sends back the corresponding voltage detection signal, etc.

[0203] In one embodiment, the wiper belongs to the third load module, and its power supply circuit is connected in parallel with the main power supply circuit of the first load. After the on-off detection of the third switch module is completed, it can continue to remain in the disconnected state, that is, when parking by the side of the road in the second operating mode, the wiper does not need to be powered on. However, after the power calculation, the remaining power in the battery can be used to drive to a place where it can be stored for a long time (such as a garage at home) or a place where it can be repaired (such as an appointment maintenance point), and the sensor detects rain, the wiper can be temporarily connected to the backup power supply circuit of the first load through the fourth switch module, and the connection with the main power supply circuit of the first load is disconnected, making the wiper the fourth load module, ensuring that the vehicle can use the wiper function during continuous driving, while abandoning power supply to other third load modules to reduce unnecessary consumption.

[0204] Figure 4 It is a flow chart of a vehicle power supply system detection method provided by one or more embodiments of the present invention.

[0205] like Figure 4 The vehicle power supply system detection method shown includes:

[0206] Step S3, obtaining information on the vehicle operation mode;

[0207] Step S4, controlling the on / off state of the switch module according to the current vehicle operation mode;

[0208] Step S5, collecting voltage status information of the power supply circuits of the first load module, the third load module and / or the fourth load module according to the on / off status of the switch module;

[0209] Step S6, detecting the health status of the vehicle power supply system according to the correspondence between the on-off status of the switch module and the voltage status of the power supply circuit.

[0210] Specifically, in actual operating scenarios, the failure of the power module is somewhat accidental and complex. For example, the DC / DC module "penetrates" the high voltage on the input side to the output side, causing the risk of breakdown of the load module, power supply circuit, detection module, etc. Although the status information of the DC / DC module can be fed back by the sensor and the control switch module can be controlled to disconnect the DC / DC module, there is a delay after all. Therefore, in addition to regularly detecting the health status of the vehicle's power supply system, it is also necessary to at least detect the health status of the vehicle's power supply system after the control switch module is controlled to disconnect the DC / DC module. The same applies to abnormal battery modules.

[0211] In this embodiment, according to the correspondence between the on / off state of the switch module and the voltage state of the power supply circuit, detecting the health state of the vehicle power supply system includes:

[0212] When the vehicle is running in the second operating mode, the first switch module is opened and the second switch module and the third switch module are closed;

[0213] Controlling the third switch module to be disconnected periodically, and corresponding to the periodic state of the third switch module being disconnected, respectively collecting the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module;

[0214] When the third switch module is in the disconnected state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are both zero;

[0215] If yes, when the third switch module is restored to the closed state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are restored to normal voltage values;

[0216] If yes, then data indicating that the vehicle power supply system is supplying power normally in the third operating mode is output.

[0217] Specifically, when the vehicle is running in the second operating mode, the first switch module is disconnected, disconnecting the power supply circuit of the DC / DC module; the second switch module and the third switch module are closed, and only the power supply of the battery module is maintained. In this switch module state, the third switch module is controlled to be disconnected periodically, and the voltage state of the main power supply circuit of the first load module and the power supply circuit of the third load module will drop to zero volts following the periodic disconnection of the third switch module. Using the sensor arranged on the power supply circuit, the abnormality of the power supply circuit can be identified.

[0218] At the same time, observe the operating status of the first load module. If the working state is not interrupted due to the periodic disconnection of the third switch module, it can be determined that the current backup power supply circuit can still supply power normally, but it cannot detect whether all other sensors on the backup power supply circuit are in normal state.

[0219] The possibility of a sensor arranged on the power supply circuit being broken down is not ruled out. The third switch module can also be controlled to be periodically disconnected without receiving synchronous feedback information on the voltage status of the main power supply circuit of the first load module or the power supply circuit of the third load module, so as to obtain judgment data on whether the sensor is in an abnormal state.

[0220] In this embodiment, according to the corresponding state of the on / off state of the switch module and the voltage state of the power supply circuit, detecting the state of the vehicle power supply system further includes:

[0221] When the vehicle is running in the third operating mode, the second switch module is disconnected and the first switch module and the third switch module are closed;

[0222] Controlling the third switch module to be disconnected periodically, and corresponding to the periodic state of the third switch module being disconnected, respectively collecting the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module;

[0223] When the third switch module is in the disconnected state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are both zero;

[0224] If yes, when the third switch module is restored to the closed state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are restored to normal voltage values;

[0225] If yes, data indicating that the vehicle power supply system is normally powered in the second operating mode is output.

[0226] Specifically, similarly, when the vehicle is running in the third operating mode, the second switch module is disconnected, disconnecting the power supply circuit of the battery module; the first switch module and the third switch module are closed, and only the power supply of the DC / DC module is maintained. In this switch module state, the third switch module is controlled to be disconnected periodically, and the voltage state of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module will follow the periodic disconnection of the third switch module and the voltage will drop to zero volts. Using the sensor arranged on the power supply circuit, the abnormality of the power supply circuit can be identified.

[0227] At the same time, observe the operating status of the first load module. If the working state is not interrupted due to the periodic disconnection of the third switch module, it can be determined that the current main power supply circuit can still supply power normally, but it cannot fully detect whether other sensors on the backup power supply circuit are in normal state.

[0228] The possibility of a sensor arranged on the power supply circuit being broken down is not ruled out. The third switch module can also be controlled to be periodically disconnected without receiving synchronous feedback on the voltage status of the backup power supply circuit of the first load module or the power supply circuit of the fourth load module, so as to obtain judgment data on whether the sensor is in an abnormal state.

[0229] In this embodiment, according to the corresponding state of the on / off state of the switch module and the voltage state of the power supply circuit, detecting the state of the vehicle power supply system further includes:

[0230] When the vehicle is operating in the first operating mode, the second switch module, the second switch module and the third switch module are closed;

[0231] Control the third switch module and the first switch module to be disconnected synchronously and periodically, and corresponding to the periodic state of the third switch module and the first switch module being disconnected synchronously, respectively collect the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module;

[0232] When the third switch module and the first switch module are in a synchronous disconnected state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are both zero;

[0233] If yes, when the third switch module and the first switch module are synchronously restored to the closed state, it is determined whether the voltage states of the main power supply circuit of the first load module and the power supply circuit of the third load module are restored to normal voltage values;

[0234] If yes, then control the third switch module and the second switch module to be disconnected synchronously and periodically, and corresponding to the periodic state of the third switch module and the second switch module being disconnected synchronously, respectively collect the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module;

[0235] When the third switch module and the second switch module are in a synchronous disconnected state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are both zero;

[0236] If yes, when the third switch module and the second switch module are synchronously restored to the closed state, it is determined whether the voltage states of the backup power supply circuit of the first load module and the power supply circuit of the fourth load module are restored to normal voltage values;

[0237] If yes, data indicating that the vehicle power supply system is normally powered in the first operating mode is output.

[0238] Specifically, in the first operating mode, the power supply circuit detection in the second operating mode and the third operating mode can be simulated separately to achieve comprehensive main power supply circuit and backup power supply circuit detection.

[0239] In this embodiment, it also includes:

[0240] Get information about the vehicle's current operating mode;

[0241] If the vehicle is currently in the first operating mode, then monitoring the status information of the power module, including status information that the DC / DC module is abnormal and the battery module is normal;

[0242] The vehicle switches to the second operation mode according to the status information that the DC / DC module is abnormal and the battery module is normal;

[0243] Capture vehicle zero-speed status information;

[0244] According to capturing the zero-speed state of the vehicle, the vehicle starts a power supply self-detection of the vehicle power supply system corresponding to the second operation mode;

[0245] If,the test is successful, a self-test report is generated and the information of,the vehicle maintenance record is captured;

[0246] If, the record information of vehicle maintenance completion is captured, the vehicle starts the vehicle power supply system power supply self-detection corresponding to the first operation mode;

[0247] If the detection is successful, the normal status information of the DC / DC module and the battery module is output, and the first operation mode is switched.

[0248] Specifically, in one operation scenario, the vehicle suddenly presents a state where the DC / DC module is abnormal and the battery module is normal, and the vehicle immediately switches to the second operation mode. Along with the switch to the second operation mode, the circuits connected to the DC / DC module and other loads are disconnected by the switch module. During the process of pulling over in the second operation mode, the zero-speed state of the vehicle is captured. When the vehicle is at zero speed, it can be considered that the vehicle is already in a relatively safe state. However, due to the abnormality of the DC / DC module of the vehicle itself (for example, the abnormal high voltage causes a breakdown risk), in addition to being handed over to maintenance personnel for processing, the efficiency of inspection and maintenance can be further improved by first self-detecting the degree of damage, such as generating a self-test report and waiting for maintenance personnel to read it.

[0249] After the maintenance, the vehicle is restarted. Although the maintenance process has been completed, it does not mean that the maintenance result is perfect. The vehicle power supply system corresponding to the first operating mode can be self-tested first. If the test passes, the second operating mode is switched to the first operating mode to control the vehicle to drive safely.

[0250] The second operation mode includes but is not limited to the strategy of pull-over parking. It also includes, after the power supply self-detection is successful, calling up navigation information and power information, evaluating the feasibility of reaching the preset navigation target location from the current location, and if feasible, restarting the vehicle and planning the route and speed according to the power to ensure that the vehicle can reach the driving destination relying on the remaining power in the battery module.

[0251] Driving destinations include places where the vehicle can be stored for a long time (such as a garage at home) and places where it can be repaired (such as an scheduled repair point), ensuring the proper storage of the vehicle and the safety of the personnel during travel.

[0252] In this embodiment, it also includes:

[0253] Get information about the vehicle's current operating mode;

[0254] If the vehicle is currently in the first operating mode, then monitoring the status information of the power module, including the status information that the DC / DC module is normal and the battery module is abnormal;

[0255] The vehicle switches to a third operation mode according to the status information that the DC / DC module is normal and the battery module is abnormal;

[0256] Capture vehicle zero-speed status information;

[0257] According to capturing the zero-speed state of the vehicle, the vehicle starts a power supply self-detection of the vehicle power supply system corresponding to the third operation mode;

[0258] If,the test is successful, a self-test report is generated and the information of,the vehicle maintenance record is captured;

[0259] If, the record information of vehicle maintenance completion is captured, the vehicle starts the vehicle power supply system power supply self-detection corresponding to the first operation mode;

[0260] If the detection is successful, the normal status information of the DC / DC module and the battery module is output, and the first operation mode is switched.

[0261] Specifically, similarly, in an operating scenario, the vehicle suddenly shows that the battery module is abnormal and the DC / DC module is normal, the vehicle immediately switches to the third operating mode, and along with the switch to the third operating mode, the battery module is disconnected by the switch module.

[0262] Similarly, a self-test report is generated. Similarly, a vehicle power supply system power supply self-test corresponding to the first operation mode can be performed first, and if the test passes, the second operation mode is switched to the first operation mode to control the vehicle to drive safely.

[0263] Figure 5It is a structural diagram of a vehicle power supply system setting device provided by one or more embodiments of the present invention.

[0264] like Figure 5 The vehicle power supply system setting device shown includes: a mode information module, a vehicle control module;

[0265] A mode information module is used to obtain vehicle operation mode information;

[0266] The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information;

[0267] Vehicle control module for

[0268] The first operation mode information includes controlling the vehicle to drive safely according to the normal state of the DC / DC module and the normal state of the battery module;

[0269] The second operation mode information includes controlling the vehicle to pull over to a side of the road according to a state in which the DC / DC module is abnormal and the battery module is normal;

[0270] The third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

[0271] Figure 6 is a structural diagram of a vehicle power supply system control device provided by one or more embodiments of the present invention.

[0272] like Figure 6 The vehicle power supply system control device shown includes: a vehicle status module, a mode control module;

[0273] Vehicle status module, used to obtain vehicle status information;

[0274] The vehicle status information includes the status information of the power module;

[0275] The status information of the power module includes the health status information of the battery module or the DC / DC module;

[0276] A mode control module, configured to control the vehicle to operate in a first operating mode if the DC / DC module is normal and the battery module is normal;

[0277] If the DC / DC module is abnormal and the battery module is normal, the vehicle is controlled to operate in the second operating mode;

[0278] If the DC / DC module is normal and the battery module is abnormal, the vehicle is controlled to operate in the third operating mode.

[0279] Figure 7 It is a structural diagram of a vehicle power supply system detection device provided by one or more embodiments of the present invention.

[0280] like Figure 7 The vehicle power supply system detection device shown includes a vehicle operation module, a switch control module, a loop voltage module, and a system detection module;

[0281] A vehicle operation module, used to obtain information about the vehicle operation mode;

[0282] A switch control module, used to control the conduction state of the switch module according to the current vehicle operation mode;

[0283] A loop voltage module, used to collect voltage status information of the power supply loop of the first load module, the third load module and / or the fourth load module according to the conduction state of the switch module;

[0284] The system detection module is used to detect the health status of the vehicle power supply system according to the corresponding state of the conduction state of the switch module and the voltage state of the power supply circuit.

[0285] It is worth noting that although the present system only discloses a mode information module, a vehicle control module, a vehicle status module, a mode control module, a vehicle operation module, a switch control module, a loop voltage module, and a system detection module, it does not mean that the present device is limited to the above-mentioned basic functional modules. Rather, what the present invention wants to express is that, based on the above-mentioned basic functional modules, those skilled in the art can arbitrarily add one or more functional modules in combination with the prior art to form an infinite number of embodiments or technical solutions. In other words, the present system is open rather than closed. Just because the present embodiment only discloses individual basic functional modules, it cannot be considered that the scope of protection of the claims of the present invention is limited to the above-mentioned basic functional modules.

[0286] Through the above scheme, the following beneficial technical effects are obtained:

[0287] The present application detects and identifies the power supply status of the first load by periodically turning the switch on and off, and completes the detection of the power supply circuit without affecting the normal operation of the first load.

[0288] The present application checks the power supply circuit of the first load after the DC / DC power supply module becomes abnormal, thereby preventing the failure to timely discover the damage to part of the power supply circuit due to the abnormality of the DC / DC power supply module.

[0289] The present application ensures that the power supply circuit of the first load is always in a more reliable power supply state by regularly detecting the main and backup power supply circuits.

[0290] Figure 8 A schematic diagram of the connection topology of a low-voltage intelligent power distribution system according to a specific embodiment of the present invention.

[0291] Fig. 9 A schematic diagram of the structure of an intelligent power distribution controller according to a specific embodiment of the present invention.

[0292] In a specific embodiment, corresponding to Figure 8 A power distribution system with the function of a comfort domain controller, which consists of a cab intelligent power distribution controller, a chassis front intelligent power distribution controller, and a chassis rear intelligent power distribution controller. Fig. 9 As shown in the figure, each intelligent power distribution controller includes the following structure: MCU detection control unit, power protection module, switch acquisition module, CAN communication output module, power output module and multiple load output circuits. The MCU detection control unit is used for logical judgment of output between modules, the power protection module is used for protection of input circuit and shutdown control under abnormal conditions, the switch acquisition module is used for collection and analysis of external switch quantity, the CAN communication output module is responsible for the allocation of CAN bus status, the power output module and multiple load output circuits are responsible for converting the input circuit into multiple small current output circuits, and real-time monitoring of its current and voltage status and control of its on and off.

[0293] The DC / DC (DC / DC power module) and low-voltage battery (battery module) are directly connected to the low-voltage power distribution controller behind the chassis. The power protection module can monitor the current and voltage of the two inputs in real time and feed back to the MCU detection control unit. The MCU detection control unit performs logical judgment and sends instructions to the power protection module, and the power protection module performs corresponding actions. Normally, the circuit in the power protection module is in the on state.

[0294] In this embodiment, the MCU detection control unit serves as the hub of the controller and is used for analog-to-digital conversion, CAN communication, output control, big data collection, etc. By logically judging the input signal, the high-side switch is controlled to adjust the power distribution output of each load. The MCU can be upgraded through the CAN bus and is suitable for software flashing of different models.

[0295] The power protection module is used for on-off control and protection when the DC / DC and battery are powered on dual-circuit, and finally outputs two independent power supplies to the power output module. The power protection module can realize undervoltage, overvoltage, short circuit detection and real-time current collection, and collect diagnostic information through the MCU and upload it to the bus. The on-off between the DC / DC and the battery, between the DC / DC and the low-voltage power distribution system, and between the battery and the low-voltage power distribution system can be controlled by the MCU. When the DC / DC or the low-voltage battery is abnormal, the MCU controls the MOS switch on the fault side to disconnect and realize fault isolation. The power supply circuit that has not failed is not affected. Through the configurable comparator, the overvoltage, undervoltage, temperature, time and current alarm thresholds can be flexibly set to meet the use requirements of different models.

[0296] The power output module is provided with two independently controllable power supplies by the power protection module, which are then divided into multiple load output circuits. Each current is protected and controlled by power components. The output load circuit can be used as the only power supply to power the electrical equipment, or the two outputs can be used as power supplies to power the equipment at the same time. The high-side switch is a key component of the intelligent power distribution controller. It can control the output of current and protect the circuit from electrical breakdown. It uses semiconductor technology and has built-in protection circuits and energy absorption circuits, so it will not be damaged even if abnormal overcurrent occurs. It has a current detection function, which can detect the operation of the load and line in real time, and has multiple protection functions: overvoltage protection, overcurrent short circuit protection, and overtemperature protection. The high-side switch can completely replace the combination of traditional fuses and relays, and is slightly better in function and performance. Traditional fuses protect the circuit by heating and melting when a fault occurs. This is a one-time and irreversible method, and requires replacement after melting. The fuse specifications are not continuous, and the commonly used ones are 5A, 10A, 15A, etc. For the intermediate current, only one specification can be increased. When the fuse is in overcurrent heating protection, the melting time varies greatly with the current, and is affected by the change of ambient temperature, and the protection characteristics are inaccurate. To compensate for the risks brought by this characteristic, the fuse specification can only be selected by increasing the margin of the fuse through basic derating, temperature derating, and adaptation specifications, and the wire diameter of the adaptation wire is greatly increased. However, the current output of the high-side switch can be flexibly controlled, and the time current protection curve can be controlled by software flashing, and the protection characteristics are electronic, which is not restricted by temperature, specifications and other conditions. The life of traditional relays is 105 to 106 times, while the life of high-side switches will be greatly increased. The single-pulse energy processing capacity is as high as 3000MJ, and for repetitive pulses it reaches 550MJ, and it can withstand more than 106 short circuits; the relay will produce a certain amount of noise when it is energized, while the high-side switch is silent when it is actuated; the high-side switch acts quickly, the classic action time of the relay is 10ms, while the action time of the high-side switch is only 100μs; if there is an arc, the contacts of the relay switch will dissolve or even stick together, and the relay will be limited under high switching frequency and high inductive load, while the high-side switch can use its energy processing ability to prevent this; the high-side switch supports low-speed pulse width modulation, realizes intelligent power management, controls load current, and meets the power requirements and potential restrictions of existing loads on the power supply.

[0297] The switch acquisition module is responsible for acquiring switch physical signals, signal filtering, switch logic judgment, fault diagnosis, switch logic signal and fault status output. The module has switch acquisition functions, switch signal abnormality and error processing, and switch fault status output functions. The processed signals are sent to the MCU detection control unit for unified processing.

[0298] The CAN communication output module is responsible for managing the status of the system CAN bus and is used to communicate with the gateway to realize signal interaction between each intelligent power distribution controller and the vehicle network. It is also responsible for sending sleep wake-up commands.

[0299] The intelligent power distribution system consists of five parts: battery, DC / DC, intelligent power distribution controller behind chassis, intelligent power distribution controller in front of chassis, and intelligent power distribution controller in cab. The battery and DC / DC are connected to the intelligent power distribution controller behind chassis respectively. DC / DC converts high voltage to low voltage to supply power to the battery and the low voltage system of the whole vehicle. The battery supplies power to the low voltage system of the whole vehicle. The power distribution controller behind chassis has a power protection module, which is used to control the on and off between DC / DC and battery, between DC / DC and low voltage power distribution system, and between battery and low voltage power distribution system. The intelligent power distribution controller behind chassis is connected to the intelligent power distribution controller in front of chassis and supplies power to the intelligent power distribution controller in front of chassis. The intelligent power distribution controller in front of chassis is connected to the intelligent power distribution controller in cab and supplies power to the intelligent power distribution controller in cab. The intelligent power distribution controllers behind chassis, in front of chassis, and in cab are connected through CAN lines for signal interaction.

[0300] Functions of the three intelligent power distribution controllers: The cab intelligent power distribution controller is responsible for the power supply and protection of all loads in the cab, and collects the driver's intention and vehicle status, including but not limited to ignition switch signal, light switch signal, wiper system signal, horn control signal, power take-off control signal, brake pedal signal, differential lock control signal, door opening status signal and other cab comfort function related signals. The front chassis intelligent power distribution controller is responsible for the power supply and protection of all loads in the front of the chassis, and collects the vehicle status in the front of the chassis, including but not limited to chassis front switch signal, chassis front lamp status and other chassis comfort function related signals. The rear chassis intelligent power distribution controller is responsible for the power supply and protection of all loads in the rear of the chassis, and collects the vehicle status in the rear of the chassis, including but not limited to chassis rear switch signal, chassis rear lamp status and trailer status signal and other chassis comfort function related signals.

[0301] The battery, DC / DC, chassis rear intelligent power distribution controller, and chassis front intelligent power distribution controller are arranged on the chassis, and the cab intelligent power distribution controller is arranged in the cab.

[0302] In another specific embodiment, when the DC / DC output voltage is higher than 32V, the MCU performs a logic judgment, and the power protection module cuts off the output of the DC / DC power input terminal 21 (equivalent to the first switch module). The low-voltage battery power input terminal 22 (equivalent to the second switch module), DC / DC and the low-voltage battery charging terminal 23 (equivalent to the third switch module) are always in an on state. After the power protection module cuts off the DC / DC power input terminal 21, it not only avoids the high-voltage impact damage to the components in the intelligent power distribution controller after the DC / DC abnormally outputs high voltage, but also avoids the high-voltage impact damage to the external wiring harness and external controller. At the same time, the low-voltage battery power input terminal 22 is always turned on, which can ensure that the battery output terminal 52 (equivalent to the backup power supply circuit) in the power output module is in a powered state; the low-voltage battery power input terminal 22, DC / DC and the low-voltage battery charging terminal 23 are always turned on, which can ensure that the DC / DC output terminal 51 (equivalent to the main power supply circuit) in the power output module is in a powered state. This method not only ensures normal power supply under abnormal input, but also avoids damage to the internal part of the intelligent power distribution controller, the low-voltage battery, the external wiring harness and the high-voltage impact of the controller.

[0303] In another specific embodiment, based on the above embodiment, the DC / DC power input terminal 21 is cut off, the low-voltage battery power input terminal 22, the DC / DC and the low-voltage battery charging terminal 23 are connected, and the whole vehicle consumes all the electricity of the low-voltage battery. Since the low-voltage battery has limited power and cannot support long-term operation at full load, when the battery SOC is lower than 50% and an alarm is issued, the low-voltage battery charging terminal 23 is cut off, and the low-voltage battery only supplies power to the battery output terminal 52. The battery output terminal 52 corresponds to loads 1, 2, 3, 4, 6, and 8 (loads 1, 2, 3, and 4 are equivalent to the first load module, loads 5 and 7 are equivalent to the third load module, and loads 6 and 8 are equivalent to the fourth load module). Optionally, the corresponding loads are strongly related loads such as vehicle functional safety and "limping" home, such as vehicle controllers, steering controllers, steering motors, gateways, unmanned driving cameras, unmanned driving controllers, etc. This solution is suitable for the case where the vehicle can only be powered by a low-voltage battery and the power is insufficient. By cutting off the DC / DC and the low-voltage battery charging terminal 23, the limited battery power is supplied to key and important loads to ensure driving safety.

[0304] The power output module divides the power processed by the power protection module into multiple load loops. Each loop is protected by a high-side switch. Each high-side switch is connected to the MCU monitoring control unit. The high-side switches are independent of each other. The high-side switch monitors the current and voltage information of the loop and feeds it back to the MCU in real time. The MCU controls the on-off strategy of the high-side switch through logical judgment based on the received switch acquisition information, CAN signal information, and high-side switch voltage and current information. At the same time, the MCU presets the time-current curve of each high-side switch and controls the upper limit of the high-side switch output current in real time to prevent the external wiring harness from smoking due to excessive output current.

[0305] The loads are divided into 6 categories: normal power, ACC power, ON power, ACC power, and controlled power. Normal power is the power that is always there; ACC power is the power output when the ignition switch is in the ACC position; ON power is the power output when the ignition switch is in the ON position; ST power is the power output when the ignition switch is in the ST position; controlled power is the rest of the power that requires logical judgment, and the control strategy is not unified.

[0306] The functions and relationships between the intelligent power distribution controllers are as follows:

[0307] The cab intelligent power distribution controller is used to collect signals related to the driver's intention and vehicle status, and to supply power to the electrical equipment arranged in the cab. The specific signals collected by the cab intelligent power distribution controller are: ignition switch signal, light switch signal, wiper system signal, horn control signal, power take-off control signal, brake pedal signal, differential lock control signal, door switch signal, rearview mirror adjustment signal, etc.; the cab intelligent power distribution controller outputs normal power for the following equipment: power socket, cigarette lighter, combination instrument, large screen on the vehicle, video image processor, combination switch, interior light, blind mirror, map light, vehicle controller, etc.; the cab intelligent power distribution controller outputs ACC power for the following equipment: air conditioner, vehicle controller, large screen on the vehicle, video image processor, blind mirror, etc.; the cab intelligent power distribution controller outputs ON gear power for the following equipment: glass defrosting, vehicle controller, combination instrument, etc. The controlled loads are: interior lighting in the cab, panel backlight, rearview mirror adjustment motor, etc.

[0308] The front chassis intelligent power distribution controller is used to collect vehicle status and supply power to the electrical equipment arranged in front of the chassis. The specific signals collected by the front chassis intelligent power distribution controller are: front wheel shoe wear status signal, front chassis lamp status, etc.; the front chassis intelligent power distribution controller outputs normal power for the following equipment: front wheel steering, front all-in-one, front drive motor control unit, front parking controller, transmission control unit, battery management unit, etc.; the front chassis intelligent power distribution controller outputs ON gear power for the following equipment: front all-in-one controller, front drive motor, front parking controller, battery management unit, lubricating oil pump, etc. The controlled loads are: electric horn, wiper motor, front cab lamp, front cab solenoid valve, etc.

[0309] The intelligent power distribution controller behind the chassis is used to collect vehicle status and supply power to the electrical equipment arranged behind the chassis. The specific signals collected by the intelligent power distribution controller behind the chassis are: rear wheel shoe wear status signal, chassis rear lamp status, etc.; the intelligent power distribution controller behind the chassis outputs normal power for the following equipment: rear wheel steering, rear all-in-one, rear drive motor control unit, rear parking controller, engine control unit, fuel coarse filter heating, etc.; the intelligent power distribution controller behind the chassis outputs ON gear power for the following equipment: rear all-in-one controller, rear drive motor, rear parking controller, 15-core trailer power socket, etc. The controlled loads are: rear lamps, air heaters, thermal management loads, etc.

[0310] The chassis rear intelligent power distribution controller is powered by a low-voltage battery and DC / DC, the chassis front intelligent power distribution controller is powered by the chassis rear intelligent power distribution controller, and the cab intelligent power distribution controller is powered by the chassis front intelligent power distribution controller. The cab intelligent power distribution controller, chassis front intelligent power distribution controller, and chassis rear intelligent power distribution controller are connected through CAN lines and can exchange information with each other through CAN lines.

[0311] Fig.10 A structural block diagram of an electronic device of a vehicle power system control method provided by one or more embodiments of the present invention.

[0312] like Fig.10 As shown, the present application provides an electronic device, including: a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other through the communication bus;

[0313] A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method.

[0314] The present application also provides a computer-readable storage medium, which stores a computer program that can be executed by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method.

[0315] The present application also provides a vehicle, comprising:

[0316] An electronic device, used to implement the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method;

[0317] A processor, the processor runs a program, and when the program runs, data output from the electronic device executes steps of a vehicle power supply system setting method, steps of a vehicle power supply system control method, or / and steps of a vehicle power supply system detection method;

[0318] The storage medium is used to store a program, which, when running, executes the steps of the vehicle power supply system setting method, the steps of the vehicle power supply system control method or / and the steps of the vehicle power supply system detection method for data output from the electronic device.

[0319] It can be known from the description of the above implementation modes that those skilled in the art can clearly understand that the present application can be implemented by means of software plus a necessary general hardware platform. Based on such an understanding, the technical solution of the present application can be essentially or partly contributed to the prior art in the form of a software product, which can be stored in a storage medium such as ROM / RAM, a magnetic disk, an optical disk, etc., and includes several instructions for enabling a computer device (which can be a personal computer, a server or a network device, etc.) to execute the methods described in the various implementation modes of the present application or certain parts of the implementation modes.

[0320] Finally, it should be noted that 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A vehicle power supply system, characterized in that: The vehicle power supply system comprises: Power modules, switch modules and load modules; The power supply module includes a DC / DC module and a battery module; The switch module includes a first switch module, a second switch module and a third switch module; The load modules include a first load module, a second load module, a third load module and a fourth load module; The power module is connected to the load module via the switch module; According to the state of charging the battery module by the DC / DC module, the battery module generates the second load module.

2. A method for setting a vehicle power supply system, characterized in that: The vehicle power supply system setting method comprises: Obtain vehicle operation mode information; The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information; The first operation mode information includes controlling the vehicle to drive safely according to the normal state of the DC / DC module and the normal state of the battery module; The second operation mode information includes controlling the vehicle to pull over to a side of the road according to a state in which the DC / DC module is abnormal and the battery module is normal; The third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

3. A vehicle power supply system control method, characterized in that: The vehicle power supply system control method comprises: Get vehicle status information; The vehicle status information includes status information of a power module; The status information of the power module includes health status information of the battery module or the DC / DC module; If the DC / DC module is normal and the battery module is normal, the vehicle is controlled to operate in the first operating mode; If the DC / DC module is abnormal and the battery module is normal, the vehicle is controlled to operate in the second operating mode; If the DC / DC module is normal and the battery module is abnormal, the vehicle is controlled to operate in the third operating mode.

4. A vehicle power supply system detection method, characterized in that: The vehicle power supply system detection method comprises: Obtain information about vehicle operating modes; According to the current vehicle operation mode, control the on / off state of the switch module; According to the on / off state of the switch module, voltage state information of the power supply circuits of the first load module, the third load module and / or the fourth load module is collected; The health status of the vehicle power supply system is detected according to the correspondence between the on-off state of the switch module and the voltage state of the power supply circuit.

5. A vehicle power supply system setting device, characterized in that: The vehicle power supply system setting device comprises: A mode information module is used to obtain vehicle operation mode information; The vehicle operation mode information includes first operation mode information, second operation mode information and third operation mode information; The first operation mode information includes controlling the vehicle to drive safely according to the normal state of the DC / DC module and the normal state of the battery module; The second operation mode information includes controlling the vehicle to pull over to a side of the road according to a state in which the DC / DC module is abnormal and the battery module is normal; The third operation mode information includes controlling the vehicle to travel at a limited speed according to the state that the DC / DC module is normal and the battery module is abnormal.

6. A vehicle power supply system control device, characterized in that: The vehicle power supply system control device comprises: Vehicle status module, used to obtain vehicle status information; The vehicle status information includes status information of a power module; The status information of the power module includes health status information of the battery module or the DC / DC module; If the DC / DC module is normal and the battery module is normal, the vehicle is controlled to operate in the first operating mode; If the DC / DC module is abnormal and the battery module is normal, the vehicle is controlled to operate in the second operating mode; If the DC / DC module is normal and the battery module is abnormal, the vehicle is controlled to operate in the third operating mode.

7. A vehicle power supply system detection device, characterized in that: The vehicle power supply system detection device comprises: A vehicle operation module, used to obtain information about the vehicle operation mode; A switch control module, used to control the conduction state of the switch module according to the current vehicle operation mode; A loop voltage module, used to collect voltage status information of the power supply loop of the first load module, the third load module and / or the fourth load module according to the conduction state of the switch module; The system detection module is used to detect the health status of the vehicle power supply system according to the corresponding state of the conduction state of the switch module and the voltage state of the power supply circuit.

8. An electronic device, characterized in that: include: A processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; A computer program is stored in the memory. When the computer program is executed by the processor, the processor executes the steps of the vehicle power supply system setting method according to claim 2, the steps of the vehicle power supply system control method according to claim 3, or / and the steps of the vehicle power supply system detection method according to claim 4.

9. A computer-readable storage medium, characterized in that: It stores a computer program that can be executed by an electronic device. When the computer program runs on the electronic device, the electronic device executes the steps of the vehicle power supply system setting method described in claim 2, the steps of the vehicle power supply system control method described in claim 3, or / and the steps of the vehicle power supply system detection method described in claim 4.

10. A vehicle, characterized in that: include: An electronic device, used to implement the steps of the vehicle power supply system setting method according to claim 2, the steps of the vehicle power supply system control method according to claim 3, or / and the steps of the vehicle power supply system detection method according to claim 4; A processor, wherein the processor runs a program, and when the program runs, data output from the electronic device executes the steps of the vehicle power supply system setting method according to claim 2, the steps of the vehicle power supply system control method according to claim 3, or / and the steps of the vehicle power supply system detection method according to claim 4; A storage medium for storing a program, which, when running, executes the steps of the vehicle power supply system setting method described in claim 2, the steps of the vehicle power supply system control method described in claim 3, or / and the steps of the vehicle power supply system detection method described in claim 4 for data output from the electronic device.

Images