Hybrid vehicle starting lithium battery intelligent power compensation method and system

Abstract

The application discloses a kind of hybrid electric vehicle starting lithium battery intelligent power compensation method and system.Therein, method includes: the information of the electric quantity SOC and health state SOH of the starting lithium battery is detected, when the SOC of the starting lithium battery is less than the low electric quantity threshold of starting lithium battery, the starting lithium battery is sent intelligent power compensation request opening by CAN signal to VCU;The VCU judges the electric quantity of power battery, according to the electric quantity of power battery, the starting lithium battery is intelligently powered by DCDC module;When the SOC of the starting lithium battery is greater than or equal to the set threshold of starting lithium battery, request the VCU exit intelligent power compensation mode.The scheme presented in the application increases the SOC precision judgment condition, ensures the threshold accuracy and rationality;Starting lithium battery increases SOH judgment condition and algorithm, with the increase of battery aging degree, the corresponding increase of power compensation quantity, guarantee battery electric quantity state.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automobiles, and more particularly to a hybrid vehicle starting lithium battery intelligent power compensation method and system. BACKGROUND

[0002] In the process of starting a traditional fuel vehicle, the power consumption of the vehicle mainly comes from the storage battery. In addition, due to the static current consumption of the vehicle and the self-discharge of the storage battery during a long period of static state, the vehicle often cannot be started due to the lack of power of the storage battery. However, for a hybrid vehicle, due to the presence of a high-voltage power battery, by adding a reasonable device and designing a corresponding strategy, the low-voltage battery can be compensated by the power battery, thereby avoiding the situation that the vehicle cannot be normally used due to the lack of power of the starting storage battery after a long period of static state.

[0003] Prior art:

[0004] The prior art determines whether to perform intelligent power compensation by directly detecting the voltage of the lead-acid storage battery, or determines the power by configuring a LIN communication power sensor, and then wakes up the vehicle at regular intervals to determine the conditions for power compensation.

[0005] Disadvantages of the prior art:

[0006] The voltage of the storage battery cannot accurately reflect the power of the storage battery, and the use of the voltage of the storage battery as a judgment condition has a large error. The vehicle is woken up at regular intervals by the master control node, and the power is compensated at regular intervals, which cannot detect the power in real time and immediately compensate the power when the conditions are met. After the vehicle is compensated for power several times in a short period of time due to a static current fault, the user is not actively reminded of the state of the vehicle in time, resulting in the vehicle being unable to be normally powered on and started.

[0007] Therefore, how to provide a hybrid vehicle starting lithium battery intelligent power compensation method, system, electronic device and storage medium has become a technical problem to be solved in the field. SUMMARY

[0008] The purpose of the present application is to provide a hybrid vehicle starting lithium battery intelligent power compensation method, system, electronic device and storage medium.

[0009] The first aspect of the present application discloses a hybrid vehicle starting lithium battery intelligent power compensation method, which comprises:

[0010] Step S1, in the power OFF mode of the vehicle, the vehicle network is in sleep mode, the starting lithium battery built-in BMS management system is in sleep mode, and the AFE module detects the information of the power SOC and the health state SOH of the starting lithium battery. When the SOC of the starting lithium battery is less than the low power threshold of the starting lithium battery, the starting lithium battery is locally woken up, and a request for intelligent power compensation is sent to the VCU through a CAN signal.

[0011] Step S2, when the VCU receives the intelligent power compensation request, judges the power of the power battery, and according to the power of the power battery, the DCDC module is used to intelligently compensate the starting lithium battery;

[0012] Step S3, when the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent power compensation mode, and the starting lithium battery enters the sleep mode.

[0013] According to the method of the first aspect of the application, in the step S1, the setting method of the low power threshold of the starting lithium battery comprises:

[0014] When the SOC accuracy of the starting lithium battery is ≥5%, the low power threshold of the starting lithium battery is: 30% / SOH;

[0015] When the SOC accuracy of the starting lithium battery is <5%, the low power threshold of the starting lithium battery is: 25% / SOH.

[0016] According to the method of the first aspect of the application, in the step S3, the setting method of the set threshold of the starting lithium battery comprises:

[0017] When the SOC accuracy of the starting lithium battery is ≥5%, the set threshold of the starting lithium battery is: 60% / SOH;

[0018] When the SOC accuracy of the starting lithium battery is <5%, the set threshold of the starting lithium battery is: 55% / SOH.

[0019] According to the method of the first aspect of the application, in the step S2, the method of intelligently compensating the starting lithium battery by the DCDC module according to the power of the power battery comprises:

[0020] When the power of the power battery is less than the set threshold of the power battery, the starting lithium battery and the power battery are simultaneously compensated by starting the engine; when the power of the power battery is greater than or equal to the set threshold of the power battery, the starting lithium battery is intelligently compensated by the DCDC module;

[0021] When the VCU judges that the power of the power battery is less than the set threshold of the power battery, the intelligent power compensation mode is exited, and the starting lithium battery is fed back the intelligent power compensation exit state.

[0022] According to the method of the first aspect of the application, in the step S2, the method further comprises:

[0023] When the VCU receives the intelligent power compensation request of the starting lithium battery, the intelligent power compensation mode is exited, and the starting lithium battery is fed back the intelligent power compensation exit state.

[0024] According to the method of the first aspect of the application, in the step S2, the setting method of the set threshold of the power battery comprises:

[0025] When the power accuracy of the power battery is greater than or equal to 5%, the set threshold of the power battery is 15% of the power of the power battery.

[0026] When the power accuracy of the power battery is less than 5%, the set threshold of the power battery is 10% of the power of the power battery.

[0027] According to the method of the first aspect of the application, in the step S2, the method further comprises:

[0028] The T-BOX controller collects the static current value of the starting lithium battery through the CAN bus, and if the static current value is greater than 50 mA, the user is reminded through the mobile phone APP information, and the pre-warning information of the abnormal static current value of the starting lithium battery is reported to the TSP platform once.

[0029] When the intelligent power compensation is triggered four times in one ignition cycle, the intelligent power compensation is no longer performed, and if the static current is still abnormal, the T-BOX controller reports the alarm information of the starting lithium battery to the background.

[0030] The second aspect of the application discloses a starting lithium battery intelligent power compensation system for a hybrid electric vehicle, which comprises:

[0031] When the vehicle is in the power OFF mode, the vehicle network is in sleep mode, the built-in BMS management system of the starting lithium battery enters the sleep mode, and is in a low-power consumption state, the AFE module detects the information of the power SOC and the health state SOH of the starting lithium battery, and when the SOC of the starting lithium battery is less than the low-power threshold of the starting lithium battery, the starting lithium battery is locally awakened, and the intelligent power compensation request is sent to the VCU through the CAN signal to start.

[0032] When the VCU receives the intelligent power compensation request, the power of the power battery is judged, and the starting lithium battery is intelligently compensated through the DCDC module according to the power of the power battery.

[0033] When the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent power compensation mode, and the starting lithium battery enters the sleep mode.

[0034] The T-BOX controller collects the static current value of the starting lithium battery through the CAN bus, and if the static current value is greater than 50 mA, the user is reminded through the mobile phone APP information, and the pre-warning information of the abnormal static current value of the starting lithium battery is reported to the TSP platform once.

[0035] When the intelligent power compensation is triggered four times in one ignition cycle, the intelligent power compensation is no longer performed, and the static current is still abnormal, the T-BOX controller reports a start lithium battery alarm information to the background.

[0036] According to the disclosed technical content of the application, the following beneficial effects are achieved:

[0037] 1. The low-voltage starting battery uses a lithium battery and an AFE chip, and in the sleep mode, when the power is lower than the set threshold, the local active wake-up can be performed, and the vehicle network is woken up to perform real-time power compensation.

[0038] 2. Not only the voltage or SOC is determined, but also the SOC accuracy determination condition is added to ensure the threshold accuracy and rationality.

[0039] 3. The SOH determination condition and algorithm of the starting lithium battery are added, the compensation threshold is increased accordingly with the increase of the battery aging degree, the compensation power is increased accordingly, and the battery power state is ensured.

[0040] Other features and advantages of the present application will become apparent from the following detailed description of illustrative embodiments thereof, which proceeds with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0041] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the application and, together with the description, serve to explain the principles of the application.

[0042] Figure 1 A flowchart of a hybrid vehicle starting lithium battery intelligent power compensation method according to an embodiment is provided.

[0043] Figure 2 A structure diagram of a hybrid vehicle starting lithium battery intelligent power compensation system according to an embodiment of the application. DETAILED DESCRIPTION

[0044] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. Note that the relative arrangement, numerical expressions, and numerical values of the components and steps set forth in these embodiments are not limiting to the scope of the present application unless otherwise specifically stated.

[0045] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way limiting to the scope of the application or its applications or uses.

[0046] Techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail herein, but should be considered as part of the specification, where appropriate.

[0047] In all of the examples shown and discussed herein, any specific values should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values.

[0048] It should be noted that like reference numerals and letters refer to like items throughout the several views, and thus a discussion of the same throughout the several views is not necessary.

[0049] Embodiment 1:

[0050] The application discloses a hybrid vehicle starting lithium battery intelligent power compensation method. Figure 1 A flow chart of the hybrid vehicle starting lithium battery intelligent power compensation method according to the embodiment of the application is shown in Figure 1 The method comprises the following steps:

[0051] In step S1, when the vehicle is in the power OFF mode, the whole vehicle network is in hibernation, the starting lithium battery built-in BMS management system enters the hibernation mode and is in a low power consumption state, the AFE module detects the information of the SOC and SOH of the starting lithium battery, when the SOC of the starting lithium battery is less than the low power threshold of the starting lithium battery, the starting lithium battery is locally woken up, and the intelligent power compensation request is sent to the VCU through the CAN signal to start;

[0052] In step S2, when the VCU receives the intelligent power compensation request, the power of the power battery is judged, and the starting lithium battery is intelligently compensated through the DCDC module according to the power of the power battery;

[0053] In step S3, when the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent power compensation mode, and the starting lithium battery enters the hibernation mode.

[0054] In some embodiments, in the step S1, the setting method of the low power threshold of the starting lithium battery comprises:

[0055] When the SOC accuracy of the starting lithium battery is greater than or equal to 5%, the low power threshold of the starting lithium battery is 30% / SOH;

[0056] When the SOC accuracy of the starting lithium battery is less than 5%, the low power threshold of the starting lithium battery is 25% / SOH.

[0057] In some embodiments, in the step S3, the setting method of the set threshold of the starting lithium battery comprises:

[0058] When the SOC accuracy of the starting lithium battery is greater than or equal to 5%, the set threshold of the starting lithium battery is 60% / SOH;

[0059] When the SOC accuracy of the starting lithium battery is less than 5%, the set threshold of the starting lithium battery is 55% / SOH.

[0060] In some embodiments, in the step S2, the method of intelligently charging the starting lithium battery according to the power of the power battery comprises the following steps.

[0061] When the power of the power battery is less than the set threshold of the power battery, the starting lithium battery and the power battery are simultaneously charged by starting the engine; when the power of the power battery is greater than or equal to the set threshold of the power battery, the starting lithium battery is intelligently charged by the DCDC module.

[0062] When the VCU determines that the power of the power battery is less than the set threshold of the power battery, the intelligent charging mode is exited, and the intelligent charging exit state is fed back to the starting lithium battery.

[0063] In some embodiments, in the step S2, the method further comprises the following steps.

[0064] When the VCU receives the intelligent charging request of the starting lithium battery, the intelligent charging mode is exited, and the intelligent charging exit state is fed back to the starting lithium battery.

[0065] In some embodiments, in the step S2, the setting method of the set threshold of the power battery comprises the following steps.

[0066] When the power accuracy of the power battery is greater than or equal to 5%, the set threshold of the power battery is 15% of the power of the power battery.

[0067] When the power accuracy of the power battery is less than 5%, the set threshold of the power battery is 10% of the power of the power battery.

[0068] In some embodiments, in the step S2, the method further comprises the following steps.

[0069] The T-BOX controller collects the static current value of the starting lithium battery through the CAN bus, and if the static current value is greater than 50 mA, the user is reminded through the mobile phone APP information, and the T-BOX controller reports the abnormal early warning information of the static current value of the starting lithium battery to the TSP platform once.

[0070] When the intelligent charging is triggered four times in one ignition cycle, the intelligent charging is not performed any more, and if the static current is still abnormal, the T-BOX controller reports the alarm information of the starting lithium battery to the background.

[0071] In summary, the scheme provided by the application has the advantages that

[0072] 1. The low-voltage starting battery uses a lithium battery, uses an AFE chip, and in sleep mode, when the power is lower than the set threshold, it can actively wake up locally and wake up the vehicle network for real-time power compensation;

[0073] 2. Not only according to voltage or SOC judgment, but also increase the SOC accuracy judgment condition to ensure the threshold accuracy and rationality;

[0074] 3. The starting lithium battery increases the SOH judgment condition and algorithm, and as the battery aging degree increases, the power compensation threshold is correspondingly increased, and the power compensation amount is correspondingly increased, to ensure the battery power state.

[0075] Embodiment 2

[0076] The application discloses a kind of hybrid electric vehicle starting lithium battery intelligent power compensation system. Figure 2 As shown in FIG. Figure 2 The system comprises:

[0077] In power OFF mode, the vehicle network is in sleep mode, and the starting lithium battery built-in BMS management system enters sleep mode and is in low-power state. AFE module detects the information of the power SOC and health state SOH of the starting lithium battery. When the SOC of the starting lithium battery is less than the low-power threshold of the starting lithium battery, the starting lithium battery wakes up locally, and sends an intelligent power compensation request to the VCU through CAN signal to start.

[0078] When the VCU receives the intelligent power compensation request, the power of the power battery is judged, and the starting lithium battery is intelligently compensated through DCDC module according to the power of the power battery.

[0079] When the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent power compensation mode, and the starting lithium battery enters sleep mode.

[0080] The T-BOX controller collects the static current value of the starting lithium battery through CAN bus. If the static current value is greater than 50mA, the user is reminded through the mobile phone APP information, and the abnormal early warning information of the static current value of the starting lithium battery is reported to the TSP platform once.

[0081] When the intelligent power compensation is triggered four times in one ignition cycle, the intelligent power compensation is no longer performed, and the static current is still abnormal, the T-BOX controller reports the starting lithium battery alarm information to the background.

[0082] In some embodiments, the setting method of the low-power threshold of the starting lithium battery comprises:

[0083] When the SOC accuracy of the starting lithium battery is ≥5%, the low power threshold of the starting lithium battery is 30% / SOH;

[0084] When the SOC accuracy of the starting lithium battery is <5%, the low power threshold of the starting lithium battery is 25% / SOH.

[0085] In some embodiments, the setting method of the setting threshold of the starting lithium battery comprises:

[0086] When the SOC accuracy of the starting lithium battery is ≥5%, the setting threshold of the starting lithium battery is 60% / SOH;

[0087] When the SOC accuracy of the starting lithium battery is <5%, the setting threshold of the starting lithium battery is 55% / SOH.

[0088] In some embodiments, the method for intelligently charging the starting lithium battery by the DCDC module according to the power of the power battery comprises:

[0089] When the power of the power battery is less than the setting threshold of the power battery, the starting lithium battery and the power battery are simultaneously charged by starting the engine; when the power of the power battery is greater than or equal to the setting threshold of the power battery, the starting lithium battery is intelligently charged by the DCDC module;

[0090] When the VCU determines that the power of the power battery is less than the setting threshold of the power battery, the intelligent charging mode is exited, and the starting lithium battery is fed back with an intelligent charging exit state.

[0091] In some embodiments, the method further comprises:

[0092] When the VCU receives a request to close the intelligent charging of the starting lithium battery, the intelligent charging mode is exited, and the starting lithium battery is fed back with an intelligent charging exit state.

[0093] In some embodiments, the setting method of the setting threshold of the power battery comprises:

[0094] When the power accuracy of the power battery is ≥5%, the setting threshold of the power battery is 15% of the power of the power battery;

[0095] When the power accuracy of the power battery is <5%, the setting threshold of the power battery is 10% of the power of the power battery.

[0096] Please note that the technical features of the above embodiments can be combined in any manner, and for the sake of brevity, not all possible combinations of the technical features in the above embodiments are described, however, as long as the combinations of the technical features do not contradict each other, they shall be deemed to be within the scope of the present specification. The above embodiments only express several implementation manners of the present application, which are described in a more specific and detailed manner, but they should not be understood as limitations to the patent scope of the present application. It should be noted that for those skilled in the art, some modifications and improvements can be made without departing from the concept of the present application, and these shall fall within the scope of the present application. Therefore, the patent protection scope of the present application shall be subject to the appended claims.

[0097] Embodiments of the subject matter and the functional operations described in this specification can be implemented in digital electronic circuitry, in tangibly-embodied computer software or firmware, in computer hardware, including the structures disclosed in this specification and their structural equivalents, or in combinations of one or more of them. Embodiments of the subject matter described in this specification can be implemented as one or more computer programs, i.e., one or more modules of computer program instructions encoded on a tangible non-transitory program carrier for execution by, or to control the operation of, data processing apparatus. Alternatively or additionally, the program instructions can be encoded on an artificially generated propagated signal, e.g., a machine-generated electrical, optical, or electromagnetic signal that is generated to encode information for transmission to suitable receiver apparatus for execution by a data processing apparatus. The computer storage medium can be a machine-readable storage device, a machine-readable storage substrate, a random or serial access memory device, or a combination of one or more of them.

[0098] The processes and logic flows described in this specification can be performed by one or more programmable computers executing one or more computer programs to perform functions by operating on input data and generating output. The processes and logic flows can also be performed by special purpose logic circuitry, e.g., an FPGA (field programmable gate array) or an ASIC (application specific integrated circuit), and the apparatus can be implemented as special purpose logic circuitry.

[0099] Computers suitable for the execution of a computer program include, by way of example, general and / or special purpose microprocessors, or any other kind of central processing unit. Generally, a central processing unit will receive instructions and data from a read-only memory and / or a random access memory. The essential elements of a computer are a central processing unit for performing or executing instructions and one or more memory devices for storing instructions and data. Generally, a computer will also include, or be operatively coupled to receive data from or transfer data to, or both, one or more mass storage devices for storing data, e.g., magnetic, magneto-optical disks, or optical disks. However, a computer need not have such devices. Moreover, a computer can be embedded in another device, e.g., a mobile telephone, a personal digital assistant (PDA), a mobile audio or video player, a game console, a Global Positioning System (GPS) receiver, or a portable storage device (e.g., a universal serial bus (USB) flash drive), to name just a few.

[0100] Computer readable media suitable for storing computer program instructions and data include all forms of non-volatile memory, media and memory devices, including by way of example semiconductor memory devices, e.g., EPROM, EEPROM, and flash memory devices; magnetic disks, e.g., internal hard disks or removable disks; magneto-optical disks; and CD-ROM and DVD-ROM disks. The processor and the memory can be supplemented by, or incorporated in, special purpose logic circuitry.

[0101] While the specification contains many specifics, these should not be construed as limiting the scope of any invention or of any claim, but as merely providing illustrations of some of the embodiments of the inventions. Certain features that are, for clarity, described above in the context of separate embodiments, can also be provided in combination in a single embodiment. Conversely, various features that are, for brevity, described above in the context of a single embodiment, can also be provided separately or in any suitable subcombination. In addition, while features can be described above as being implemented in digital electronic circuitry, forms, or combinations of an appropriate device, such features are not limited to hardware implementations, but can also be provided in terms of a computer software product, or a computer hardware product, including a computer program tangibly embodied in a computer readable storage medium for execution by a computer or any suitable apparatus or processing device executing the program. Furthermore, it should be emphasized that a variety of computer-readable storage media is available, such as a semiconductor-based RAM, a ROM, a DVD, a CD, a hard disk, a floppy disk, a cartridge, a tape, and the like, for storing computer program instructions and data structures.

[0102] Similarly, while operations are depicted in the drawings in a particular order, this should not be understood as requiring such an order, nor that all illustrated operations be performed, to achieve desirable results. In certain circumstances, multitasking and parallel processing can be advantageous. Moreover, the separation of various system modules and components in the embodiments described above should not be understood as requiring such separation in all embodiments, and it should be understood that the described program components and systems can generally be integrated in a single software product or packaged into multiple software products.

[0103] Thus, particular embodiments of the subject matter have been described. Other embodiments are within the scope of the following claims. In some cases, actions recited in the claims can be performed in a different order and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve the desired results. In certain implementations, multitasking and parallel processing can be advantageous.

[0104] The above descriptions are only preferred embodiments of the present application and are not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

[0105] Although some specific embodiments of the present application have been described in detail by way of example with reference to the accompanying drawings, it is to be understood that the above examples are intended to be illustrative only and are not intended to limit the scope of the present application. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present application. The scope of the present application is defined by the appended claims.

Claims

1. A method for intelligently replenishing the lithium battery during the start-up of a hybrid electric vehicle, characterized in that, The method includes: Step S1: When the vehicle is in power OFF mode, the vehicle network goes into sleep mode, the built-in BMS management system of the start-up lithium battery enters sleep mode and is in a low power consumption state. The AFE module detects the SOC and SOH information of the start-up lithium battery. When the SOC of the start-up lithium battery is less than the low charge threshold of the start-up lithium battery, the start-up lithium battery is locally woken up and sends a smart charging request to the VCU through the CAN signal to start. Step S2: When the VCU receives the intelligent charging request, it determines the power battery level and, based on the power battery level, intelligently charges the starting lithium battery through the DC-DC module. Step S3: When the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent charging mode, and the starting lithium battery enters the sleep mode. Methods for setting the low battery threshold for starting a lithium battery include: When the SOC accuracy of the lithium battery is ≥5%, the low charge threshold for starting the lithium battery is: 30% / SOH; When the SOC accuracy of the starting lithium battery is <5%, the low charge threshold for starting the lithium battery is: 25% / SOH; The methods for setting the threshold for starting the lithium battery include: When the SOC accuracy of the lithium battery is ≥5%, the set threshold for starting the lithium battery is: 60% / SOH; When the SOC accuracy of the lithium battery is less than 5%, the set threshold for starting the lithium battery is: 55% / SOH; The method for intelligently replenishing the starting lithium battery via a DC-DC module based on the power battery's charge includes: When the power battery's charge is less than the set threshold, the engine is started to simultaneously charge both the starting lithium battery and the power battery; when the power battery's charge is greater than or equal to the set threshold, the DC-DC module intelligently charges the starting lithium battery. When the VCU determines that the power battery's charge is less than the set threshold, it exits the intelligent charging mode and simultaneously sends feedback of the intelligent charging exit status to the starting lithium battery. The method further includes: When the VCU receives a request to turn off the intelligent charging of the starting lithium battery, it exits the intelligent charging mode and sends feedback on the intelligent charging exit status to the starting lithium battery. The methods for setting the threshold values ​​of the power battery include: When the power battery charge accuracy is ≥ 5%, the set threshold for the power battery is 15% of the power battery charge. When the power battery charge accuracy is less than 5%, the set threshold for the power battery is 10% of the power battery charge. The method further includes: The T-BOX controller collects the static current value of the starting lithium battery through the CAN bus. If the static current value is greater than 50mA, it will remind the user through the mobile APP and report the abnormal static current value of the starting lithium battery to the TSP platform. If the intelligent power replenishment is triggered four times during an ignition cycle and then stops, and the static current is still abnormal, the T-BOX controller will report a start-up lithium battery alarm to the backend.

2. A smart charging system for a lithium battery during the start-up of a hybrid electric vehicle, wherein the system employs the method described in claim 1, characterized in that, The system includes: When the vehicle is in power-off mode, the vehicle network goes into sleep mode, and the start-up lithium battery's built-in BMS management system enters sleep mode and is in a low-power state. The AFE module detects the SOC and SOH information of the start-up lithium battery. When the SOC of the start-up lithium battery is less than the low charge threshold of the start-up lithium battery, the start-up lithium battery is locally woken up and sends a smart charging request to the VCU via CAN signal to start. When the VCU receives the intelligent power replenishment request, it determines the power level of the power battery and, based on the power battery's power level, intelligently replenishes the starting lithium battery through the DC-DC module. When the SOC of the starting lithium battery is greater than or equal to the set threshold of the starting lithium battery, the VCU is requested to exit the intelligent charging mode, and the starting lithium battery enters the sleep mode. The T-BOX controller collects the static current value of the starting lithium battery through the CAN bus. If the static current value is greater than 50mA, it will remind the user through the mobile APP and report the abnormal static current value of the starting lithium battery to the TSP platform. If the intelligent power replenishment is triggered four times during an ignition cycle and then stops, and the static current is still abnormal, the T-BOX controller will report a start-up lithium battery alarm to the backend.

Images