Power supply emergency starting system and power supply emergency starting method

Abstract

The application provides an emergency starting system of a power supply, which comprises a main battery, a first charge-discharge circuit, a power management module, a central control unit and a battery acquisition module, and further comprises a redundant power supply module, a second charge-discharge circuit and an emergency starting module; a positive electrode end of the main battery is connected to the first charge-discharge circuit, and a negative electrode end is grounded; the second charge-discharge circuit is connected to the first charge-discharge circuit; a positive electrode of the redundant power supply module is connected to the second charge-discharge circuit, and a negative electrode is grounded; the redundant power supply module is used for supplying power to the whole vehicle; the power management module is connected to the emergency starting module and is used for providing working power for the emergency starting module; the central control unit is connected to the battery acquisition module and the emergency starting module; and the emergency starting module is further connected to the second charge-discharge circuit. The emergency starting system of the power supply eliminates the need for manpower to externally supply power after battery failure or power loss, ensures uninterrupted power supply of the whole vehicle, and avoids many inconveniences caused by vehicle rescue or manual power supply to the vehicle.

Description

TECHNICAL FIELD

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

[0002] With the intelligentization of automobiles and the more complex power supply energy consumption requirements, the safety of the vehicle voltage power supply system is more prominent. The existing integrated scheme integrates 12V lithium battery, super capacitor, E-fuse and other relatively independent functions together to form oneBOX (internal control circuit of intelligent low-voltage power distribution box). It provides a more low-cost and highly integrated 12V power supply module design, which also brings potential risks.

[0003] Due to the high integration and the use of a large number of electronic devices, the multi-output of 12V lithium battery may be unexpectedly cut off, thereby causing the vehicle power supply to be cut off. Due to battery aging or high power consumption after vehicle electrification, 12V battery depletion is more likely to occur, thereby causing the vehicle to be unable to start, and the driver needs to perform vehicle rescue or manually power the vehicle, which brings a lot of inconvenience.

[0004] Therefore, it is a technical problem to be solved by those skilled in the art to develop an emergency management system for vehicle redundant power supply, which ensures that the vehicle power supply is not affected when the 12V lithium battery cannot normally supply power, and avoids the inconvenience caused by rescue or manual power supply. SUMMARY

[0005] In order to overcome the above technical defects, the purpose of the present application is to provide a power emergency starting system and a power emergency starting method, which does not need to manually power externally after battery failure or depletion, ensures uninterrupted vehicle power supply, and avoids the inconvenience of vehicle rescue or manual power supply to the vehicle.

[0006] The present application discloses a power emergency starting system, which comprises a main battery, a first charge-discharge circuit, a power management module, a central control unit and a battery acquisition module, and further comprises a redundant power supply module, a second charge-discharge circuit and an emergency starting module.

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

[0008] The positive electrode of the redundant power supply module is connected to the second charge-discharge circuit, and the negative electrode is grounded; the second charge-discharge circuit is connected to the first charge-discharge circuit.

[0009] The power management module is connected to the emergency starting module and is used to provide working power for the emergency starting module.

[0010] The central control unit is connected with the battery collection module and the emergency starting module, and is used for acquiring the state of the main battery collected by the battery collection module, generating a second hardware input signal when the main battery fails, and sending the second hardware input signal to the emergency starting module; the emergency starting module can also receive a first hardware input signal from outside the system;

[0011] The emergency starting module is also connected with the second charge-discharge circuit, and is used for receiving the first hardware input signal from outside when unexpected power failure occurs in the parking mode, generating a first hardware output signal according to the first hardware input signal from outside, and sending the first hardware output signal to the second charge-discharge circuit to control the second charge-discharge circuit to be turned on;

[0012] Or when the battery collection module collects that the main battery is in a failure state, generating a first hardware output signal according to the second hardware input signal sent by the central control unit, and sending the first hardware output signal to the second charge-discharge circuit to control the second charge-discharge circuit to be turned on.

[0013] Optionally, the redundant power supply module is also used for generating a third hardware input signal;

[0014] The emergency starting module is also connected with the redundant power supply module, and is used for acquiring the third hardware input signal, judging whether the current voltage of the redundant power supply module is within a safe voltage threshold according to the third hardware input signal;

[0015] If the current voltage is higher than the safe voltage threshold, a first hardware output signal is sent to the second charge-discharge circuit;

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

[0017] Optionally, the central control unit is also connected with the first charge-discharge circuit, and is also used for controlling the first charge-discharge circuit to be turned off when the main battery fails.

[0018] Optionally, the central control unit is also used for generating and sending a fourth hardware input signal to the emergency starting module, and controlling the emergency starting module to stop outputting the first hardware output signal.

[0019] Optionally, the emergency starting module comprises an OR gate, an AND gate, a triode and a voltage comparator.

[0020] A first input end of the OR gate is used for receiving the first hardware input signal from outside the system, a second input end of the OR gate is connected with the central control unit and is used for inputting the second hardware input signal, and an output end is connected with a first input end of the AND gate.

[0021] The drain of the triode 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 starting module and is connected to the second charge-discharge circuit

[0022] The first input end of the voltage comparator is used for inputting the third hardware input signal, and the negative input end receives a safety voltage threshold signal.

[0023] Optionally, the OR gate is used for receiving the first hardware input signal or the second hardware input signal and outputting a first high flat voltage signal.

[0024] The voltage comparator is used for receiving a third hardware input signal and outputting a second high flat 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 for generating a third high flat voltage signal according to the received first high flat voltage signal and second high flat voltage signal, inputting the triode, outputting a fourth high flat voltage signal through the triode, and outputting the fourth high flat voltage signal as the first hardware output signal to the second charge-discharge circuit.

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

[0027] Optionally, the third input end of the AND gate is further connected to the central control unit and is used for receiving the fourth hardware input signal, blocking the third high voltage output, and stopping the output of the first hardware output signal.

[0028] Optionally, the redundant power supply module comprises a super capacitor or a battery.

[0029] The application further discloses a power supply emergency starting method applied to any one of the power supply emergency starting systems disclosed in the preceding aspect.

[0030] The power management module provides power supply to the emergency starting module.

[0031] When unexpected power failure occurs in the parking mode, the emergency starting module receives the first hardware input signal from the outside, generates a first hardware output signal according to the first hardware input signal from the outside, and sends the first hardware output signal to the second charge-discharge circuit to control the second charge-discharge circuit to be turned on.

[0032] Or, the central control unit acquires the state of the main battery collected by the battery collection module, and generates a second hardware input signal and sends it to the emergency starting module when the main battery fails;

[0033] The emergency starting module generates a first hardware output signal according to the second hardware input signal sent by the central control unit, and sends it to the second charge-discharge circuit to control the second charge-discharge circuit to be turned on.

[0034] After adopting the above technical scheme, compared with the prior art, the following beneficial effects are obtained:

[0035] 1. The emergency starting module is designed, and the second charge-discharge circuit is controlled to be turned on through the first hardware input signal when the power is unexpectedly cut off in the parking mode and the second hardware input signal received by the central control unit when the main battery fails, the redundant power supply module outputs the emergency power supply, and the power cut-off caused by the unexpected power cut-off of the main battery is avoided.

[0036] 2. The redundant power supply module provides the emergency power supply, and manual power connection is saved, and the inconvenience caused by vehicle rescue and manual power connection is eliminated.

[0037] 3. The emergency starting module is designed to output the emergency power supply only when the voltage of the redundant power supply module is sufficient, so that over-discharge of the redundant power supply module is avoided. BRIEF DESCRIPTION OF DRAWINGS

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

[0039] Figure 2 A structural schematic diagram of an emergency starting module according to an embodiment of the present application;

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

[0041] Figure 4 A flowchart of a power emergency starting method according to an embodiment of the present application;

[0042] REFERENCE NUMERALS:

[0043] 1 - central control unit;

[0044] 2 - first charge-discharge circuit;

[0045] 3 - second charge-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 application are further set forth in the description that follows, and will be appreciated by persons skilled in the art upon reading and understanding the following detailed description.

[0055] Exemplary embodiments are described herein below with reference to the accompanying drawings. In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the present application can be practiced without these specific details. In other instances, well-known structures and devices are not described in exhaustive detail in order to avoid obscuring the present application. Also, the description is not to be considered limiting in scope, since the present application is covered by any and all modifications, combinations, equivalents, and / or alternatives falling within the spirit and scope of the appended claims.

[0056] The terminology used in the description of the present application herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application. As used in the description of the present application and the appended claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will also be understood that the term "and / or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0057] In the description of the present application, it should be understood that the terms "inner", "outer", and the like, indicate an orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are merely intended to facilitate the description of the present application and simplify the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present application.

[0058] In the description of the present application, unless otherwise specified and limited, it should be noted that the terms "mounting", "connecting", "connection" should be understood broadly, for example, it can be a mechanical connection or an electrical connection, or a communication between two elements, or a direct connection, or an indirect connection through an intermediate medium, and the specific meaning of the above terms can be understood by those skilled in the art according to the specific circumstances.

[0059] In the following description, the suffixes used to indicate elements such as "module", "part", or "unit" are merely used to facilitate the description of the present application, and do not have a specific meaning by themselves. Therefore, "module" and "part" can be used interchangeably.

[0060] One aspect of the present application provides an emergency starting system of power supply, referring to Figure 1 , shows the structure diagram of an emergency starting system of power supply according to the present application. The emergency starting system of power supply is integrated in oneBOX, including main battery 8, central control unit 1, first charge-discharge circuit 2, power management module (PMIC) 5 and battery acquisition module 4. It also includes: redundant power supply module 6, emergency starting module 7 and second charge-discharge circuit 3.

[0061] The positive electrode of the main battery 8 is connected to the first charge-discharge circuit 2, and the negative electrode is grounded through the KL31 terminal; the main battery 8 is used to supply power to the whole 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-discharge circuit 2 shown in the embodiment includes charge-discharge circuit 1, charge-discharge circuit 2 and charge-discharge circuit 3, but the number of charge-discharge circuits provided in the present application is not limited to this, and the number can be adjusted according to actual needs.

[0062] The positive electrode of the redundant power supply module 6 is connected to the second charge-discharge circuit 3, and the negative electrode 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 whole vehicle through the first charge-discharge circuit 2, the redundant power supply module 6 provides emergency power supply through the second charge-discharge circuit 3 to maintain the normal work of the whole vehicle. Specifically, the redundant power supply module 6 includes a super capacitor or a battery, Figure 1 The second charge-discharge circuit 3 shown only shows charge-discharge circuit 4, of course, the present application is not limited to this.

[0063] The power management module (PMIC) is connected to the emergency starting module 7 and is used to provide working power for the emergency starting module 7, so that an external power supply is not needed to supply power to the emergency starting module. In this embodiment, the power management module PMIC can provide 5V voltage.

[0064] The central control unit 1 is connected with the battery collection module 4 and the emergency starting module 7, and is used for acquiring the state of the main battery 8 collected by the battery collection module 4, and when the main battery 8 is in a fault state, a second hardware input signal is generated and sent to the emergency starting module 7; the fault of the main battery 8 refers to that the voltage of the main battery 8 is too low to support the next engine starting and the like. The emergency starting module 7 can also receive an external first hardware input signal. In the embodiment, when unexpected power failure occurs in the parking mode, the driver opens the car door in a specific way or the vehicle is subjected to external collision, the first external hardware input signal of the vehicle is triggered, the oneBOX receives the first external hardware input signal through the whole vehicle interface, and the first external hardware input signal is transmitted to the emergency starting module 7.

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

[0066] The technical scheme provided by the application introduces the redundant power supply module and the second charge-discharge circuit as the redundant power supply circuit of the whole vehicle, integrates the emergency starting module, and realizes the control of the on-off of the second charge-discharge circuit in combination with the existing central control unit and the like. When the main battery on the vehicle is faulty or when unexpected power failure occurs in the parking mode, the emergency starting module can control the second charge-discharge circuit to be turned on according to the second hardware signal acquired from the central control unit or the first external hardware signal of the whole vehicle received, the redundant power supply module replaces the main battery to supply power to the outside, and the power supply of the whole vehicle is ensured to be continuous, and external power connection is saved. The problems of vehicle non-starting after battery power loss or unexpected power failure of the main battery are solved, and the inconvenience of vehicle rescue or manual power connection 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 solution, the redundant power supply module 6 is further configured to generate a third hardware input signal; the emergency starting module 7 is further connected with the redundant power supply module 6 and configured to acquire the third hardware input signal and determine whether the current voltage of the redundant power supply module 6 is within a safe voltage threshold according to the third hardware input signal; the third hardware input signal comprises the current voltage of the redundant power supply module 6. If the current voltage is higher than the safe voltage threshold, the first hardware output signal is sent to the second charge-discharge circuit 3; if the current voltage is lower than the safe voltage threshold, the sending of the first hardware output signal to the second charge-discharge circuit 3 is stopped. Thus, only when the voltage value of the redundant power supply module 6 meets the safe voltage threshold, the redundant power supply module 6 can replace the main battery 8 to supply power to the whole vehicle, thereby avoiding over-discharge of the redundant power supply module 6. The safe voltage threshold is stored in the emergency starting module 7, and the value is determined according to actual needs, which is not limited in the present application.

[0068] In a further preferred solution of the present application, the central control unit 1 is further connected with the first charge-discharge circuit 2 and configured to control the first charge-discharge circuit 2 to be disconnected when the battery fails or is in a power shortage state, so as to disconnect the voltage output of the main battery 8 and ensure that the main battery 8 in a power shortage state is in a safe state, thereby preventing over-discharge of the main battery 8.

[0069] Optionally, the central control unit 1 is further configured to generate and send a fourth hardware input signal to the emergency starting module 7 to control the emergency starting module 7 to stop outputting the first hardware output signal, so as to actively close the emergency starting function. The fourth hardware input signal is a low-level signal. When the diagnostic test is performed or the emergency starting is not needed, the central control unit 1 actively closes the emergency starting function of the system. The function test of the emergency starting module 7 is described in detail in the subsequent content of the present application.

[0070] In a further solution of the present application, refer to Figure 2 , a structure schematic diagram of an emergency starting module according to the present application is shown. Refer to Figure 2 , the emergency starting module 7 comprises an OR gate 71, an AND gate 73, a triode M and a voltage comparator 72.

[0071] The first input end of the OR gate 71 is configured to receive a first hardware input signal, which is connected with the whole vehicle interface in the embodiment; the second input end of the OR gate 71 is connected with the central control unit 1 and configured to input a second hardware input signal; the output end is connected with the first input end of the AND gate 73; when the first hardware input signal or the second hardware input signal is received, the OR gate 71 outputs a 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 triode M is connected to the power output of the power management module, the gate is connected to the output of the AND gate 73, and the source is the output of the emergency starting module 7, which is connected to the second charge-discharge circuit 3. When the output of the AND gate 71 is high, the triode M is turned on, and the 5V voltage of the PMIC (power management module) is output. When the output of the AND gate 71 is low, the triode M is turned off, and the 5V voltage of the PMIC (power management module) is not output.

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

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

[0075] In a preferred scheme, the third input of the AND gate 73 is connected to the central control unit 1, the AND gate 73 receives the fourth hardware input signal, the fourth hardware input signal is a low voltage signal, and the third high voltage S3 is blocked, thereby stopping the output of the first hardware output signal to actively close the emergency starting function of the emergency starting module 7. When the system detects a large current short circuit outside or the system is in a maintenance and diagnosis state, the central control unit 1 receives the feedback detection signal and the emergency starting module diagnosis state information, generates and controls the emergency starting module 7 to close through the fourth hardware input signal.

[0076] Further, the central control unit 1 is connected to the source of the transistor M, for receiving a hardware diagnosis output signal 1, to the first input of the AND gate 73, for receiving a hardware diagnosis output signal 2, and to the output of the comparator, for receiving a hardware diagnosis output signal 3. According to the received output hardware diagnosis output signal 1, the central control unit 1 diagnoses whether the AND gate 73 is configured and can work normally, according to the output hardware diagnosis output signal 2, diagnoses whether the OR gate 71 is configured and can work normally, and according to the output hardware diagnosis output signal 3, diagnoses whether the voltage comparator 72 is configured and can work normally. Specifically, when the first input of the OR gate 71 inputs a high level signal, the OR gate 71 outputs a high level S1, and the central control unit 1 detects that the hardware diagnosis signal 2 is a high level, otherwise, it detects a low level signal, and further diagnoses whether the OR gate 71 can work normally through the hardware diagnosis signal 2. When the voltage inputted to the positive input of the voltage comparator 72 is greater than the safety voltage threshold of the negative input, the output end outputs a high level S2, and the central control unit 1 detects that the hardware diagnosis signal 3 is a high level, otherwise, it detects a low level signal, and diagnoses whether the voltage comparator 72 can work normally through the hardware diagnosis signal 3. Further, if the hardware diagnosis signal 2 and the hardware diagnosis signal 3 are both high levels, and the hardware diagnosis signal 1 is detected to be a high level, the AND gate 73 also works normally.

[0077] In the embodiment, the source of the transistor M at the output end of the emergency starting module 7 is connected to the connection ports between the second charge-discharge circuit 3 and the central control unit 1, and diodes D1, D2, D3 and D4 are arranged respectively, and the 5V output of the PMIC (battery management module 5) is used to control external devices or output diagnosis signals. A resistor R is further connected in series between the drain of the transistor and the PMIC of the battery management module 5, for circuit protection.

[0078] Before the formal emergency starting management, the functions of the above-mentioned components in the emergency starting module 7 need to be diagnosed: when the whole vehicle is in a dormant state, the central control unit 1 outputs a fourth hardware input signal to inhibit the output of the AND gate 73. The fourth hardware input signal is a low level signal.

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

[0080] Figure 3 An emergency starting system of a power supply is shown, which meets an example embodiment of the present application, in Figure 3 In the embodiment shown, the charging and discharging circuits 1, 2 and 3 are connected in parallel in the internal control circuit (oneBOX) of the intelligent low-voltage power distribution box, and the KL30 terminals of the charging and discharging circuits 3 and 4 are connected; the charging and discharging circuits can use electronic fuse, relay, Mosfet device, etc., to control the KL30 terminal 1, KL30 terminal 2 and KL30 terminal 3 or KL30 terminal 4 to output power supply to the outside. Control circuit 1 and drive circuit 1, control circuit 2 and drive circuit 2, control circuit 3 and drive circuit 3, control circuit 4 and drive circuit 4 are further arranged between the central control unit 1 and each charging and discharging circuit, and the central control unit 1 controls the charging and discharging circuits 1-3 or 4 to be turned on or turned off through the above control circuit and drive circuit. For the charging and discharging circuits 1, 2 and 3, the control circuits 1, 2 and 3 used are all Mosfet hardware circuits, realizing the separate control of the first charging and discharging circuit. The specific hardware circuit uses the vehicle-mounted hardware circuit, which is not described here. The second charging and discharging circuit is controlled separately by using an independent control circuit 4. The KL30 terminal 4 is connected with any one of the KL30 terminals 1, 2 or 3 in the charging and discharging circuits 1, 2 and 3, and is usually connected with the terminal output to the high-level safety module, so as to be connected in the charging and discharging circuits 1, 2 or 3. When the main battery fails, the charging and discharging circuit 4 replaces any one of the charging and discharging circuits 1-3 to supply power to the high-level safety module, realizing the redundant safety power supply of the high-level safety module. The high-level safety module usually includes: the high-level safety module usually includes: steering module, automatic driving module, etc.

[0081] In the present example, the redundant power supply module 6 is set as a super capacitor. A PNP triode is further connected between the super capacitor and the emergency starting module 7, the central control unit 1 is connected to the control end of the PNP triode, and the PNP triode is turned on by outputting a high-level signal. The third hardware input signal of the super capacitor voltage is input to the emergency starting module 7 to start voltage comparison.

[0082] The power emergency starting system further comprises a pin connection module (for connecting a battery) and a cell data acquisition module connected between the main battery 8 and the battery acquisition module 4 in sequence. The PMIC (battery management module 5) is connected between the pin connection module (for connecting a battery) and the cell data acquisition module. The battery acquisition module 4 is further connected to one end of the system self-current consumption acquisition module, and the other end of the system self-current consumption acquisition module is connected to the negative electrode of the main battery 8. In addition, the central control unit 1 is connected to the whole vehicle interface through the CAN drive chip. The above setting details are all conventional settings or common technical means easily thought of by those skilled in the art, and the specific function principles of each are not described in detail.

[0083] The present application further discloses a power emergency starting method applied to the power emergency starting system of any one of the previous aspects of the present application. Referring to Figure 4 , a flowchart of a power emergency starting method according to the present application is shown. The power emergency starting method comprises:

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

[0085] S2: When unexpected power failure occurs in the parking mode, the emergency starting module receives the first hardware input signal from the outside, generates a first hardware output signal according to the first hardware input signal from the outside, and sends it to the second charge-discharge circuit to control the second charge-discharge circuit to turn on;

[0086] Alternatively, the central control unit acquires the state of the main battery collected by the battery acquisition module, generates a second hardware input signal when the main battery fails, and sends it to the emergency starting module;

[0087] The emergency starting module generates a first hardware output signal according to the second hardware input signal sent by the central control unit, and sends it to the second charge-discharge circuit to control the second charge-discharge circuit to turn on.

[0088] In combination with Figure 2 and Figure 3 , the emergency starting management process is described in detail:

[0089] Before the emergency start management is formally carried out, the functions of the components in the emergency start module 7, such as the AND gate 73, the OR gate 71, the voltage comparator 72, etc., are diagnosed, and after the diagnosis is completed and it is confirmed that the functions are normally configured, the emergency start management function is started to be executed.

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

[0091] The emergency start management is mainly applied to the following two situations:

[0092] Situation (I): When unexpected power failure occurs in the parking mode:

[0093] When the emergency management is started, the driver opens the car door in a specific way or triggers the first hardware input signal of the vehicle when an external collision occurs, 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, and at the same time, the emergency start module 7 judges whether the super capacitor is in a safe and available state according to the third hardware input signal of the feedback voltage of the super capacitor. When the judgment result is yes, the first output hardware output signal controls the closing of the charge-discharge circuit 4, so as to connect the super capacitor to the vehicle power supply terminal, output power through the KL30 terminal 4 to supply power to the vehicle, and ensure the normal work of the vehicle. Otherwise, the emergency start module 7 does not start the charge-discharge circuit 4; so as to judge whether the battery voltage is available before the emergency start, and ensure that the super capacitor 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 disconnection of the discharge circuit 1, the discharge circuit 2 and the charge-discharge circuit 1, so as to prevent the main battery (such as the vehicle-mounted lithium battery) from over-discharging.

[0096] Situation (II): The battery acquisition module acquires that the main battery is in a fault state:

[0097] When the central control unit 1 is in an active state, the battery state is monitored through the battery acquisition module 4, and when it is found that the battery is faulty, the second hardware input signal is generated. The emergency start module 7 generates a first hardware output signal according to the second hardware input signal, and at the same time, the emergency start module 7 judges whether the super capacitor is in a safe and available state according to the feedback voltage of the super capacitor. When the judgment result is yes, the first output hardware output signal is output to control the closing of the charge-discharge circuit 4, and the super capacitor replaces the main battery 8 to supply power to the vehicle; otherwise, the emergency start module 7 does not start the charge-discharge circuit. Thus, the second hardware input signal of the internal monitoring of the main battery 8 controls the triggering of the emergency start module 7 to start the redundant power supply.

[0098] In summary, the power emergency starting system provided by the application achieves that the redundant power supply module replaces the main battery to supply power to the outside through emergency management, saves external power connection, solves the problem of vehicle non-starting after battery power shortage or unexpected power-off of the main battery, avoids many inconveniences caused by vehicle rescue or manual power connection to the vehicle. Further, it is ensured that only when the voltage value of the redundant power supply module meets the safety voltage threshold, the redundant power supply module replaces the main battery to supply power to the vehicle, avoiding over-discharge of the redundant power supply module.

[0099] In addition, the application designs an emergency starting module for emergency management. Compared with the emergency management scheme centering on the central control unit, it has low power consumption and does not need to keep the system awake. Moreover, the emergency management module adopts hardware control, which has the advantages of short control time and high efficiency compared with the software control scheme of the central control unit.

[0100] It should be noted that the embodiments of the application have better implementation, and do not limit the application in any form. Any skilled person in the art can change or modify the equivalent effective embodiments by using the disclosed technical content, as long as it does not deviate from the technical solution of the application. Any modification or equivalent change and modification of the above embodiments according to the technical essence of the application are still within the scope of the technical solution of the application.

Claims

1. A power emergency starting system, comprising a main battery, a first charge and discharge circuit, a power management module, a central control unit and a battery collection module, characterized in that: It also includes: redundant power supply module, second charge and discharge circuit and 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 power the entire 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 collected by the battery acquisition module. When the main battery fails, it generates a second hardware input signal and sends it to the emergency start module. The emergency start module can also receive a first hardware input signal from outside the system; The emergency start module is further connected to the second charge-discharge circuit and is used to: when an unexpected power outage 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; Alternatively, 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 the first hardware output signal is sent to the second charge and discharge circuit to control the conduction of the second charge and discharge circuit; The redundant power supply module is further configured to generate a third hardware input signal; The emergency startup module is further 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.

2. 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.

3. The power emergency starting system according to claim 1, characterized in that: The central control unit is further configured 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.

4. The power emergency starting system according to any one of claims 3, characterized in that: The emergency start module includes: an OR gate, an AND gate, a transistor 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 terminal of the power management module, the gate is connected to the output terminal of the AND gate, and the source serves as the output terminal 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 the safety voltage threshold signal, and the output terminal of the voltage comparator is connected to the second input terminal of the AND gate.

5. The power emergency starting system according to claim 4, characterized in that: The OR gate is configured 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 both high-level signals; 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; The AND gate is used to generate a third high-level voltage signal based on the received first high-level voltage signal and the second high-level voltage signal, input the third high-level voltage signal to the transistor, and output a fourth high-level voltage signal through the transistor as the first hardware output signal to the second charge and discharge circuit.

6. The power emergency starting system according to claim 5, characterized in that: The voltage comparator is configured to output a low-level voltage when the current voltage is less than the safety voltage threshold, and the OR gate stops outputting the third high-level voltage signal, thereby blocking the output of the first hardware output signal.

7. The power emergency starting system according to claim 5, characterized in that: The third input end of the AND gate is also connected to the central control unit for receiving the fourth hardware input signal and blocking the output of the third high-level voltage signal to stop outputting the first hardware output signal.

8. The power emergency starting system according to claim 1, wherein: The redundant power supply module includes a super capacitor or a battery.

9. A power emergency starting method, characterized in that: The power supply emergency starting system according to any one of claims 1 to 8; the power supply emergency starting method comprises: The power management module provides power to the emergency start module; When an unexpected power outage occurs in 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; 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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