Power supply emergency starting system and power supply emergency starting method

Abstract

The invention provides a power supply emergency starting system, which comprises a main battery, a first charging and discharging loop, a power supply management module, a central control unit and a battery acquisition module, and further comprises a redundant power supply module, a second charging and discharging loop and an emergency starting module, the anode end of the main battery is connected to the first charge-discharge loop, and the cathode end is grounded; the second charging and discharging loop is connected to the first charging and discharging loop; the anode of the redundant power supply module is connected to the second charge-discharge loop, and the cathode is grounded; the power supply is used for supplying power; the power management module is connected with the emergency starting module and is used for providing a working power supply for the emergency starting module; the central control unit is connected with the battery acquisition module and the emergency starting module, and the emergency starting module is further connected with the second charging and discharging loop. The situation that external power supply needs to be conducted manually after the battery breaks down or is insufficient in power is avoided, it is guaranteed that power supply of the whole vehicle is not interrupted, and inconvenience caused by vehicle rescue or manual power supply to the vehicle is avoided.

Description

Technical Field

[0001] The present invention relates to the field of automobile power management, and in particular to a power emergency starting system and a power emergency starting method. Background Art

[0002] With the increasing intelligence of automobiles and the requirements for more complex power supply energy consumption, the safety of the voltage power supply system of the entire vehicle has become more prominent. The existing integrated solution combines relatively independent functions such as 12V lithium batteries, supercapacitors, and E-fuse to form oneBOX (intelligent low-voltage distribution box internal control circuit). It provides a more low-cost and highly integrated 12V power supply module design, but also brings potential risks.

[0003] Due to the high degree of integration and the use of a large number of electronic devices, the multiple outputs of the 12V lithium battery may be unexpectedly cut off, resulting in the power supply of the entire vehicle being cut off. Due to battery aging or high power consumption after vehicle electrification, it is easy for the 12V battery to run out of power, resulting in the vehicle being unable to start. The driver needs to rescue the vehicle or manually jump-charge the vehicle, which brings a lot of inconvenience.

[0004] Therefore, developing an emergency management system with redundant power supply for the whole vehicle to ensure that the vehicle power supply is not affected when the 12V lithium battery fails to supply power normally, while avoiding the inconvenience caused by rescue or manual charging, has become a technical problem that technical personnel in this field urgently need to solve. Summary of the invention

[0005] In order to overcome the above-mentioned technical defects, the purpose of the present invention is to provide a power supply emergency starting system and a power supply emergency starting method, which eliminates the need for external power jump-starting by manpower after battery failure or power failure, thereby ensuring uninterrupted power supply to the entire vehicle and avoiding a lot of inconvenience caused by vehicle rescue or manual vehicle power jump-starting.

[0006] The present invention discloses a power supply emergency starting system, including a main battery, a first charging and discharging circuit, a power management module, a central control unit and a battery acquisition module, and also includes: a redundant power supply module, a second charging and discharging circuit and an emergency starting module;

[0007] The positive terminal of the main battery is connected to the first charge and discharge circuit, and the negative terminal is grounded;

[0008] The positive pole of the redundant power supply module is connected to the second charge-discharge circuit, and the negative pole is grounded; it is used to supply power to the whole vehicle; the second charge-discharge circuit is connected to the first charge-discharge circuit;

[0009] The power management module is connected to the emergency start module and is used to provide working power to the emergency start module;

[0010] The central control unit is connected to the battery acquisition module and the emergency start module, and is used to obtain the status of the main battery acquired by the battery acquisition module. When the main battery fails, a second hardware input signal is generated and sent to the emergency start module; the emergency start module can also receive a first hardware input signal outside the system;

[0011] The emergency start module is also connected to the second charge-discharge circuit, and is used to: when an unexpected power failure occurs in the parking mode, receive the first external hardware input signal, generate a first hardware output signal according to the first external hardware input signal, and send it to the second charge-discharge circuit to control the conduction of the second charge-discharge circuit;

[0012] Or when the battery acquisition module detects that the main battery is in a fault state, a first hardware output signal is generated according to the second hardware input signal sent by the central control unit, and is sent to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit.

[0013] Optionally, the redundant power supply module is further used to generate a third hardware input signal;

[0014] The emergency start module is further connected to the redundant power supply module to obtain the third hardware input signal, and judge whether the current voltage of the redundant power supply module is within the safety voltage threshold according to the third hardware input signal;

[0015] If the current voltage is higher than the safety voltage threshold, sending a first hardware output signal to the second charge and discharge circuit;

[0016] If the current voltage is lower than the safety voltage threshold, the sending of the first hardware output signal to the second charge and discharge circuit is stopped.

[0017] Optionally, the central control unit is also connected to the first charge and discharge circuit, and is also used to control the first charge and discharge circuit to be disconnected when the main battery fails.

[0018] Optionally, the central control unit is further used to generate and send a fourth hardware input signal to the emergency start module to control the emergency start module to stop outputting the first hardware output signal.

[0019] Optionally, the emergency start module includes: an OR gate, an AND gate, a transistor and a voltage comparator;

[0020] The first input end of the OR gate is used to receive the first hardware input signal outside the system, the second input end of the OR gate is connected to the central control unit, and is used to input the second hardware input signal; the output end is connected to the first input end of the AND gate;

[0021] The drain of the transistor is connected to the power output end of the power management module, the gate is connected to the output end of the AND gate, and the source is used as the output end of the emergency start module and connected to the second charge and discharge circuit.

[0022] The first input terminal of the voltage comparator is used to input the third hardware input signal, the negative input terminal receives a safety voltage threshold signal, and the output terminal of the voltage comparator is connected to the second input terminal of the AND gate.

[0023] Optionally, the OR gate is used to receive the first hardware input signal or the second hardware input signal and output a first high-level voltage signal; the first hardware input signal and the second hardware input signal are high-level signals;

[0024] The voltage comparator is configured to receive a third hardware input signal and output a second high-level voltage signal when the current voltage of the redundant power supply module is greater than the safety voltage threshold;

[0025] The AND gate is used to generate a third high-level voltage signal according to the received first high-level voltage signal and the second high-level voltage signal, input the third high-level voltage signal into the transistor, output a fourth high-level voltage signal through the transistor, and output the fourth high-level voltage signal to the second charge and discharge circuit as the first hardware output signal.

[0026] Optionally, the voltage comparator is used to output a low voltage when the current voltage is less than the safety voltage threshold, and the OR gate stops outputting a third high voltage signal, thereby blocking the output of the first hardware output signal.

[0027] Optionally, the third input terminal of the AND gate is also connected to the central control unit for receiving the fourth hardware input signal and blocking the third high level output to stop outputting the first hardware output signal.

[0028] Optionally, the redundant power supply module includes a supercapacitor or a battery.

[0029] The present invention further discloses a power supply emergency starting method, which is applied to any power supply emergency starting system disclosed in the previous aspect of the present invention; the power supply emergency starting method comprises:

[0030] The power management module provides power to the emergency start module;

[0031] When an unexpected power failure occurs in the parking mode, the emergency start module receives the first external hardware input signal, generates a first hardware output signal according to the first external hardware input signal, and sends the first hardware output signal to the second charge-discharge circuit to control the conduction of the second charge-discharge circuit;

[0032] Alternatively, the central control unit obtains the status of the main battery collected by the battery collection module, and when the main battery fails, generates a second hardware input signal and sends it to the emergency start module;

[0033] The emergency start module generates a first hardware output signal according to the second hardware input signal sent by the central control unit, and sends the first hardware output signal to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit.

[0034] Compared with the prior art, the above technical solution has the following beneficial effects:

[0035] 1. Design an emergency start module, and control the conduction of the second charge and discharge circuit through the first hardware input signal when the power is unexpectedly cut off in the parking mode and the second hardware input signal of the central control unit received when the main battery fails. The redundant power supply module outputs the emergency power supply, avoiding the power outage caused by the unexpected power outage of the main battery.

[0036] 2. The redundant power supply module provides emergency power, eliminating the need for manual power-on and the inconvenience caused by vehicle rescue and manual power-on.

[0037] 3. The emergency start module is designed to output emergency power only when the voltage of the redundant power supply module is sufficient, thus avoiding over-discharge of the redundant power supply module. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A schematic diagram of the structure of a power emergency starting system according to an embodiment of the present invention;

[0039] Figure 2 A schematic diagram of the structure of an emergency start module according to an embodiment of the present invention;

[0040] Figure 3 A schematic diagram of the structure of a power emergency starting system according to an exemplary embodiment of the present invention;

[0041] Figure 4 A schematic diagram of a flow chart of a power emergency starting method according to an embodiment of the present invention;

[0042] Reference numerals:

[0043] 1- Central control unit;

[0044] 2- the first charge and discharge circuit;

[0045] 3- The second charge and discharge circuit;

[0046] 4-Battery collection module;

[0047] 5-Battery management module;

[0048] 6- Redundant power supply module;

[0049] 7- Emergency start module;

[0050] 71-OR gate;

[0051] 72- voltage comparator;

[0052] 73-AND gate;

[0053] 8- Main battery. DETAILED DESCRIPTION

[0054] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0055] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0056] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0057] In the description of the present invention, it is necessary to understand that the terms "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0058] In the description of the present invention, unless otherwise specified and limited, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection between two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0059] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and have no specific meanings. Therefore, "module" and "component" can be used interchangeably.

[0060] In one aspect, the present invention provides a power supply emergency starting system. Figure 1 , shows a schematic diagram of the structure of a power emergency start system in accordance with the present invention. The power emergency start system is integrated in oneBOX, including a main battery 8, a central control unit 1, a first charge and discharge circuit 2, a power management module (PMIC, Power Management IC) 5 and a battery acquisition module 4. It also includes: a redundant power supply module 6, an emergency start module 7 and a second charge and discharge circuit 3.

[0061] The positive terminal of the main battery 8 is connected to the first charge-discharge circuit 2, and the negative terminal is grounded through the KL31 terminal; the main battery 8 is used to supply power to the entire vehicle through the first charge-discharge circuit 2. In this embodiment, the main battery 8 is a 12V lithium battery. Figure 1 The first charge and discharge circuit 2 shown in the illustrated embodiment includes a charge and discharge circuit 1, a charge and discharge circuit 2 and a charge and discharge circuit 3, but the charge and discharge circuits provided in the present invention are not limited thereto, and the number of the provided circuits can be adjusted according to actual needs.

[0062] The positive pole of the redundant power supply module 6 is connected to the second charge-discharge circuit 3, and the negative pole is grounded. The second charge-discharge circuit is connected to the first charge-discharge circuit; the second charge-discharge circuit 3 and the redundant power supply module 6 serve as a supplement to the main battery 8 and the first charge-discharge circuit 2. When the main battery 8 cannot supply power to the vehicle through the first charge-discharge circuit 2, the redundant power supply module 6 provides emergency power through the second charge-discharge circuit 3 to maintain the normal operation of the vehicle. Specifically, the redundant power supply module 6 includes a supercapacitor or a battery, Figure 1 The second charge and discharge circuit 3 shown also only shows the charge and discharge circuit 4 , and of course, the present invention is not limited thereto.

[0063] The power management module (PMIC) is connected to the emergency start module 7 and is used to provide working power to the emergency start module 7, so no external power supply is needed to power the emergency start module. In this embodiment, the power management module PMIC can provide a 5V voltage.

[0064] The central control unit 1 is connected to the battery acquisition module 4 and the emergency start module 7, and is used to obtain the status of the main battery 8 collected by the battery acquisition module 4. When the main battery 8 is found to be in a faulty state, a second hardware input signal is generated and sent to the emergency start module 7; the main battery 8 fault refers to: the voltage of the main battery 8 is too low and cannot support the next engine start, etc. The emergency start module 7 can also receive an external first hardware input signal. In this embodiment, when an unexpected power outage occurs in parking mode, the driver opens the car door in a specific way or the vehicle is hit by an external collision, the vehicle is triggered to generate the external first hardware input signal, and oneBOX receives the external first hardware input signal through the vehicle interface and transmits it to the emergency start module 7.

[0065] The emergency start module 7 is also connected to the second charge-discharge circuit 3. The emergency start module 7 is used to: when an unexpected power failure occurs in the parking mode, receive an external first hardware input signal, generate a first hardware output signal according to the external first hardware input signal, and send it to the second charge-discharge circuit 3 to control the second charge-discharge circuit 3 to be turned on; or generate a first hardware output signal according to the second hardware input signal sent by the central control unit 1, and send it to the second charge-discharge circuit to control the second charge-discharge circuit 3 to be turned on.

[0066] The technical solution provided by the present invention introduces a redundant power supply module and a second charge-discharge circuit as redundant power supply lines for the whole vehicle, and integrates an emergency start module and combines with existing central control units and other modules to realize the control of the conduction and shutdown of the second charge-discharge circuit; when the main battery on the vehicle fails or an unexpected power outage occurs in the parking mode, the emergency start module can control the conduction of the second charge-discharge circuit according to the second hardware signal obtained from the central control unit or the first external hardware signal received from the whole vehicle, and the redundant power supply module replaces the main battery to supply power to the outside, ensuring that the power supply of the whole vehicle is not disconnected, eliminating the need for external jumpering. The problem of the vehicle not starting after the battery is exhausted or the unexpected power outage of the main battery is solved, and a lot of inconvenience caused by vehicle rescue or manual jumpering of the vehicle is avoided. The modules are integrated together, the cost is low, and better functional safety requirements can be achieved.

[0067] In a further preferred embodiment, the redundant power supply module 6 is also used to generate a third hardware input signal; the emergency start module 7 is also connected to the redundant power supply module 6 to obtain the third hardware input signal, and judge whether the current voltage of the redundant power supply module 6 is within the safety voltage threshold according to the third hardware input signal; the third hardware input signal includes: the current voltage of the redundant power supply module 6. If the current voltage is higher than the safety voltage threshold, the first hardware output signal is sent to the second charge and discharge circuit 3; if the current voltage is lower than the safety voltage threshold, the first hardware output signal is stopped from being sent to the second charge and discharge circuit 3. Therefore, only when the voltage value of the redundant power supply module 6 meets the safety voltage threshold, the redundant power supply module 6 replaces the main battery 8 to supply power to the whole vehicle, so as to avoid over-discharge of the redundant power supply module 6. The safety voltage threshold is stored in the emergency start module 7, and the value is determined according to actual needs, which is not limited by the present invention.

[0068] In a further preferred embodiment of the present invention, the central control unit 1 is also connected to the first charge and discharge circuit 2, and is also used to control the first charge and discharge circuit 2 to be disconnected when the battery fails or is low on power, thereby disconnecting the voltage output of the main battery 8, ensuring that the low-power main battery 8 is in a safe state and preventing the main battery 8 from being over-discharged.

[0069] Optionally, the central control unit 1 is further used to generate and send a fourth hardware input signal to the emergency start module 7, to control the emergency start module 7 to stop outputting the first hardware output signal, so as to actively turn off the emergency start function. The fourth hardware input signal is a low level signal. When performing a diagnostic test or when emergency start is not required, the central control unit 1 actively turns off the emergency start function of the system. The functional test of the emergency start module 7 is described in detail in the subsequent content of the present invention.

[0070] In a further embodiment of the present invention, refer to Figure 2 , which shows a schematic diagram of the structure of an emergency start module according to the present invention. Figure 2 The emergency start module 7 includes: an OR gate 71, an AND gate 73, a transistor M and a voltage comparator 72.

[0071] The first input end of the OR gate 71 is used to receive the first hardware input signal. In this embodiment, it is connected to the vehicle interface. The second input end of the OR gate 71 is connected to the central control unit 1 for inputting the second hardware input signal. The output end is connected to the first input end of the AND gate 73. When receiving the first hardware input signal or the second hardware input signal, the OR gate 71 outputs the first high-level voltage signal S1 to the AND gate 73. The first hardware input signal or the second hardware input signal is a high-level signal.

[0072] The drain of the transistor M is connected to the power output end of the power management module, the gate is connected to the output end of the AND gate 73, the source is used as the output end of the emergency start module 7, and the output end is connected to the second charge and discharge loop 3. When the AND gate 71 outputs a high level, the transistor M is turned on, and the 5V voltage of the PMIC (power management module) is output. When the AND gate 71 outputs a low level, the transistor M is turned off, and the 5V of the PMIC (power management module) is not output.

[0073] The first input terminal of the voltage comparator 72 is used to input the third hardware input signal, and the negative input terminal receives the safety voltage threshold signal. The output terminal of the voltage comparator 72 is connected to the second input terminal of the AND gate 73. The voltage comparator 72 is used to compare the current voltage with the safety voltage threshold, and when the current voltage is greater than the safety voltage threshold, output a second high-level voltage signal S2; the AND gate 73 generates a third high-level voltage signal S3 according to the received first high-level voltage signal S1 and the second high-level voltage signal S2, inputs the third high-level voltage signal S3 to the transistor M, and outputs a stable fourth high-level voltage signal S4 through the transistor M, which is output as the first hardware output signal to the second charge and discharge circuit 3 to control the conduction of the circuit, thereby ensuring that oneBOX can provide emergency power to the entire vehicle.

[0074] When the current voltage is less than the safety voltage threshold, the voltage comparator 72 outputs a low-level voltage signal; the OR gate 71 stops outputting the third high-level voltage signal, thereby blocking the output of the first hardware output signal, and the emergency start module 7 stops sending the first hardware output signal to the second charge and discharge circuit 3 to avoid over-discharge of the redundant power supply module 6. Optionally, a loop transistor is also connected between the first input end of the OR gate 71 and the output end of the power management module PMIC to avoid external voltage instability and impact, or insufficient driving capability.

[0075] In a preferred solution, the third input end of the AND gate 73 is connected to the central control unit 1, and the AND gate 73 receives the fourth hardware input signal, which is a low-level signal, blocking the third high-level S3 output, thereby stopping the output of the first hardware output signal, so as to actively shut down the emergency start function of the emergency start module 7. When the system detects that there is a large current short circuit outside or the system is in a maintenance diagnosis state, the central control unit 1 receives the feedback detection signal and the emergency start module diagnosis state information, generates and controls the emergency start module 7 to shut down through the fourth hardware input signal.

[0076] In a further optional solution, the central control unit 1 is also connected to the transistor source for receiving the hardware diagnostic output signal 1; connected to the first input terminal of the AND gate 73 for receiving the hardware diagnostic output signal 2, and connected to the comparator output terminal for receiving the hardware diagnostic output signal 3; respectively diagnoses whether the AND gate 73 is configured and can work normally according to the received output hardware diagnostic output signal 1, diagnoses whether the OR gate 71 is configured and can work normally according to the output hardware diagnostic output signal 2, and diagnoses whether the voltage comparator 72 is configured and can work normally according to the output hardware diagnostic output signal 3. Specifically, when a high-level signal is input to the first input terminal of the OR gate 71, the OR gate 71 outputs a high-level S1, and the central control unit 1 detects that the hardware diagnostic signal 2 is a high-level signal, otherwise, it detects that it is a low-level signal, and then diagnoses whether the OR gate 71 can work normally according to the hardware diagnostic signal 2. When the voltage input to the positive input terminal of the voltage comparator 72 is greater than the safety voltage threshold of the negative input terminal, the output terminal outputs a high level S2, and the central control unit 1 detects that the hardware diagnostic signal 3 is at a high level, otherwise it detects a low level signal, so that the voltage comparator 72 can be diagnosed whether it can work normally through the hardware diagnostic signal 3. Furthermore, if the hardware diagnostic signal 2 and the hardware diagnostic signal 3 are both at a high level, and the hardware diagnostic signal 1 is detected to be at a high level at the same time, the function of the AND gate 73 is also configured normally.

[0077] In this embodiment, diodes D1, D2, D3, and D4 are respectively arranged between the source of the transistor M as the output end of the emergency start module 7 and the connection port between the second charge and discharge circuit 3 and the central control unit 1, and the 5V output of the PMIC (battery management module 5) is used to control external devices or output diagnostic signals. A resistor R is also connected in series between the drain of the transistor and the PMIC of the battery management module 5 to play a circuit protection role.

[0078] Before formally carrying out emergency start management, the functions of the above components in the emergency start module 7 need to be diagnosed: when the vehicle is in a dormant state, the central control unit 1 outputs a fourth hardware input signal to disable the output of the AND gate 73. The fourth hardware input signal is a low level signal.

[0079] The driver triggers the CAN driver chip to report the door opening signal by opening the door, generates and sends the first hardware input signal, and the central control unit 1 detects whether the hardware diagnostic signal 2 is high level. If the detection result is high level, the S1 output is normal, and the AND gate 73 function configuration is normal; when the voltage value of the redundant power supply module 6 meets the safety voltage threshold, it detects whether the hardware diagnostic signal 3 is high level. If the detection result is high level, the S2 output is normal, and the voltage comparator 72 function configuration is normal; when both hardware diagnostic signals 2 and 3 are high level, the central control unit 1 outputs a high level signal through the channel of the fourth hardware input signal, turns on the emergency start module 7, and detects whether the hardware diagnostic signal 1 output is high level. If so, the signal S4 output by the AND gate 73 is high level, and the AND gate 73 function configuration is normal. If one of the detections fails, that is, one of the signals in S1, S2 or S4 outputs a low level, the corresponding device function configuration is wrong, and the system prohibits the use of the emergency start module 7 and reports the whole vehicle.

[0080] Figure 3 A power emergency starting system in accordance with an exemplary embodiment of the present invention is shown. Figure 3 In the illustrated embodiment, in the internal control circuit (oneBOX) of the intelligent low-voltage distribution box, each charging and discharging circuit 1, 2, and 3 are connected in parallel, and the KL30 terminals of the charging and discharging circuits 3 and 4 are connected; each charging and discharging circuit can use electronic fuses, relays, Mosfet devices, etc. to control KL30 terminal 1, KL30 terminal 2 and KL30 terminal 3 or KL30 terminal 4 to output power to the outside. A control circuit 1 and a drive circuit 1, a control circuit 2 and a drive circuit 2, a control circuit 3 and a drive circuit 3, and a control circuit 4 and a drive circuit 4 are also arranged between the central control unit 1 and each charging and discharging circuit. The central control unit 1 controls the charging and discharging circuits 1 to 3 or 4 to be turned on or off through the above-mentioned control circuits and drive circuits. For the charging and discharging circuits 1, 2, and 3, the control circuits 1, 2, and 3 used are all Mosfet hardware circuits to realize the separate control of the first charging and discharging circuit. The specific hardware circuit adopts the vehicle-mounted hardware circuit, which is not repeated here. The second charging and discharging circuit is controlled separately using an independent control circuit 4. KL30 terminal 4 is connected to any of KL30 terminals 1, 2 or 3 in the charge and discharge circuits 1, 2, and 3, and is usually connected to the terminal output to the high-level safety module, thereby being connected to the charge and discharge circuits 1, 2 or 3. When the main battery fails, the charge and discharge circuit 4 replaces any of the charge and discharge circuits 1-3 to supply power to the high-level safety module, thereby realizing redundant safety power supply of the high-level safety module. High-level safety modules usually include: High-level safety modules usually include: steering modules, automatic driving modules, etc.

[0081] In this example, the redundant power supply module 6 is configured as a supercapacitor. A PNP transistor is also connected between the supercapacitor and the emergency start module 7. The central control unit 1 is connected to the control end of the PNP transistor, and turns on the PNP transistor by outputting a high-level signal to control the third hardware input signal of the supercapacitor voltage to be input into the emergency start module 7 to start voltage comparison.

[0082] The power emergency starting system also includes: a pin connection module (for connecting the battery) and a battery cell data acquisition module which are sequentially connected between the main battery 8 and the battery acquisition module 4. The PMIC (battery management module 5) is connected between the pin connection module (for connecting the battery) and the battery cell data acquisition module. The battery acquisition module 4 is also connected to one end of the system's own current consumption acquisition module, and the other end of the system's own current consumption acquisition module is connected to the negative pole of the main battery 8. In addition, the central control unit 1 is connected to the vehicle interface through the CAN driver chip. The above setting details are all conventional settings or conventional technical means that can be easily thought of by technicians in this field, and their specific functional principles will not be repeated.

[0083] The present invention also discloses a power supply emergency starting method, which is applied to the power supply emergency starting system described in any one of the previous aspects of the present invention; Figure 4 , shows a schematic flow chart of a power emergency startup method according to the present invention. The power emergency startup method comprises:

[0084] S1: The power management module provides power to the emergency start module;

[0085] S2: When an unexpected power failure occurs in the parking mode, the emergency start module receives the first external hardware input signal, generates a first hardware output signal according to the first external hardware input signal, and sends the first hardware output signal to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit;

[0086] Alternatively, the central control unit obtains the status of the main battery collected by the battery collection module, and when the main battery fails, generates a second hardware input signal and sends it to the emergency start module;

[0087] The emergency start module generates a first hardware output signal according to the second hardware input signal sent by the central control unit, and sends the first hardware output signal to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit.

[0088] Combination Figure 2 and Figure 3 , and give a detailed description of the emergency start-up management process:

[0089] Before formally carrying out the emergency startup management, the functions of components such as the AND gate 73, the OR gate 71, and the voltage comparator 72 in the emergency startup module 7 are diagnosed. After the diagnosis is completed and it is confirmed that the functional configuration is normal, the emergency startup management function is started.

[0090] The emergency start module 7 is powered on, and the internal 5V PMIC (power management module) of the Onebox provides power. At the same time, it also provides power to the central control unit.

[0091] Emergency startup management is mainly used in the following two situations:

[0092] Scenario 1: When an unexpected power outage occurs in parking mode:

[0093] When emergency management begins, the driver opens the car door in a specific way or when an external collision occurs, triggers the vehicle to generate a first hardware input signal and transmits it to the emergency start module 7 through the vehicle interface.

[0094] The emergency start module 7 generates a first hardware output signal according to the first hardware input signal. At the same time, the emergency start module 7 determines whether the supercapacitor is in a safe power supply state according to the third hardware input signal of the feedback supercapacitor voltage. When the judgment result is yes, the first output hardware output signal controls the charging and discharging circuit 4 to be closed, thereby connecting the supercapacitor to the power supply end of the whole vehicle, and outputting power to the whole vehicle through the KL30 terminal 4 to ensure the normal operation of the whole vehicle. Otherwise, the emergency start module 7 does not start the charging and discharging circuit 4; thus, before performing the emergency start, it is first determined whether the battery voltage is available to ensure that the supercapacitor is not over-discharged.

[0095] Before this, when it is detected that the battery voltage is low or cannot support the next engine start, the central control unit 1 can also control the discharge circuit 1, the discharge circuit 2, and the charge and discharge circuit 1 to be disconnected, so as to prevent the main battery (such as the vehicle-mounted lithium battery) from being over-discharged.

[0096] Scenario 2: The battery acquisition module detects that the main battery is in a fault state:

[0097] When the central control unit 1 is in an activated state, the battery state is monitored through the battery acquisition module 4. When a battery failure is found, a second hardware input signal is generated, and the emergency start module 7 generates a first hardware output signal according to the second hardware input signal. At the same time, the emergency start module 7 judges whether the supercapacitor is in a safe state to provide voltage according to the feedback voltage of the supercapacitor. When the judgment result is yes, the first output hardware output signal is output to control the closing of the charge and discharge circuit 4, and the supercapacitor replaces the main battery 8 to power the whole vehicle; otherwise, the emergency start module 7 does not start the charge and discharge circuit. Thus, the second hardware input signal of the internal monitoring main battery 8 is controlled to trigger the emergency start module 7 to start redundant power supply.

[0098] In summary, the power emergency starting system provided by the present invention realizes that the redundant power supply module replaces the main battery to supply power to the outside through emergency management, eliminating the need for external jumpering, solving the problem of the vehicle not starting after the battery is exhausted or the main battery unexpectedly losing power, and avoiding the inconvenience caused by vehicle rescue or manual jumpering of the vehicle. It further ensures that the redundant power supply module replaces the main battery to supply power to the entire vehicle only when the voltage value of the redundant power supply module meets the safety voltage threshold, avoiding over-discharge of the redundant power supply module.

[0099] In addition, the present invention designs an emergency start module for emergency management. Compared with the emergency management solution centered on the central control unit, it has low power consumption and does not require the system to remain awake. The emergency management module adopts hardware control, which has the advantages of short control time and high efficiency compared to the software control solution of the central control unit.

[0100] It should be noted that the embodiments of the present invention have better practicability and do not limit the present invention in any form. Any technician familiar with the field may use the above disclosed technical content to change or modify it into an equivalent effective embodiment. However, any modification or equivalent change and modification made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still belongs to the scope of the technical solution of the present invention.

Claims

1. A power emergency starting system, comprising a main battery, a first charging and discharging circuit, a power management module, a central control unit and a battery collection module, characterized in that: It also includes: a redundant power supply module, a second charging and discharging circuit and an emergency start module; The positive terminal of the main battery is connected to the first charge and discharge circuit, and the negative terminal is grounded; The positive pole of the redundant power supply module is connected to the second charge-discharge circuit, and the negative pole is grounded; it is used to supply power to the whole vehicle; the second charge-discharge circuit is connected to the first charge-discharge circuit; The power management module is connected to the emergency start module and is used to provide working power to the emergency start module; The central control unit is connected to the battery acquisition module and the emergency start module, and is used to obtain the status of the main battery acquired by the battery acquisition module. When the main battery fails, a second hardware input signal is generated and sent to the emergency start module; the emergency start module can also receive a first hardware input signal outside the system; The emergency start module is also connected to the second charge-discharge circuit, and is used to: when an unexpected power failure occurs in the parking mode, receive the first external hardware input signal, generate a first hardware output signal according to the first external hardware input signal, and send the first hardware output signal to the second charge-discharge circuit to control the conduction of the second charge-discharge circuit; Or when the battery acquisition module detects that the main battery is in a fault state, a first hardware output signal is generated according to the second hardware input signal sent by the central control unit, and is sent to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit.

2. The power emergency starting system according to claim 1, characterized in that: The redundant power supply module is also used to generate a third hardware input signal; The emergency start module is also connected to the redundant power supply module, and is used to obtain the third hardware input signal, and determine whether the current voltage of the redundant power supply module is within the safety voltage threshold according to the third hardware input signal; If the current voltage is higher than the safety voltage threshold, sending the first hardware output signal to the second charge and discharge circuit; If the current voltage is lower than the safety voltage threshold, the sending of the first hardware output signal to the second charge and discharge circuit is stopped.

3. The power emergency starting system according to claim 1, characterized in that: The central control unit is also connected to the first charge and discharge circuit, and is used to control the first charge and discharge circuit to be disconnected when the main battery fails.

4. The power emergency starting system according to claim 1, characterized in that: The central control unit is further used to generate and send a fourth hardware input signal to the emergency start module to control the emergency start module to stop outputting the first hardware output signal.

5. The power emergency starting system according to any one of claims 1, characterized in that: The emergency start module includes: an OR gate, an AND gate, a triode and a voltage comparator; The first input end of the OR gate is used to receive the first hardware input signal outside the system, the second input end of the OR gate is connected to the central control unit, and is used to input the second hardware input signal; the output end is connected to the first input end of the AND gate; The drain of the transistor is connected to the power output end of the power management module, the gate is connected to the output end of the AND gate, and the source serves as the output end of the emergency start module and is connected to the second charge and discharge circuit; The first input terminal of the voltage comparator is used to input the third hardware input signal, the negative input terminal receives a safety voltage threshold signal, and the output terminal of the voltage comparator is connected to the second input terminal of the AND gate.

6. The power emergency starting system according to claim 5, characterized in that: The OR gate is used to receive the first hardware input signal or the second hardware input signal and output a first high-level voltage signal; the first hardware input signal and the second hardware input signal are high-level signals; The voltage comparator is used to receive a third hardware input signal, and output a second high-level voltage signal when the current voltage of the redundant power supply module is greater than the safety voltage threshold; The AND gate is used to generate a third high-level voltage signal according to the received first high-level voltage signal and the second high-level voltage signal, input the third high-level voltage signal into the transistor, output a fourth high-level voltage signal through the transistor, and output the fourth high-level voltage signal to the second charge and discharge circuit as the first hardware output signal.

7. The power emergency starting system according to claim 6, characterized in that: The voltage comparator is used to output a low voltage when the current voltage is less than the safety voltage threshold, and the OR gate stops outputting the third high voltage signal to block the output of the first hardware output signal.

8. The power emergency starting system according to claim 6, characterized in that: The third input terminal of the AND gate is also connected to the central control unit for receiving the fourth hardware input signal and blocking the third high level output to stop outputting the first hardware output signal.

9. The power emergency starting system according to claim 1, characterized in that: The redundant power supply module includes a super capacitor or a battery.

10. A power emergency starting method, characterized in that: The power supply emergency starting system is applied to any one of claims 1 to 9; the power supply emergency starting method comprises: The power management module provides power to the emergency start module; When an unexpected power failure occurs in the parking mode, the emergency start module receives the first external hardware input signal, generates a first hardware output signal according to the first external hardware input signal, and sends the first hardware output signal to the second charge-discharge circuit to control the conduction of the second charge-discharge circuit; Alternatively, the central control unit obtains the status of the main battery collected by the battery collection module, and when the main battery fails, generates a second hardware input signal and sends it to the emergency start module; The emergency start module generates a first hardware output signal according to the second hardware input signal sent by the central control unit, and sends the first hardware output signal to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit.

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