Disclosure of Invention
The embodiment of the invention provides a control method and a control device of a DCDC converter and a vehicle, and aims to at least solve the technical problem of low energy utility of the vehicle caused by single output control strategy of the existing DCDC converter.
According to an aspect of an embodiment of the present invention, there is provided a control method of a DCDC converter, including: and acquiring the working mode and the battery state information of the vehicle, wherein the working mode comprises at least one of the following steps: a start mode, a drive mode, a limp-home mode, a park charge mode, an energy recovery mode, a fault mode, and battery state information including at least one of: battery state information, power battery state information; and generating a target instruction set based on the working mode and the battery state information, wherein the target instruction set is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at different preset voltage output levels, and the preset voltage output levels are determined by the electric network characteristics of the vehicle.
Optionally, the preset voltage output level includes a first output level and a second output level, an output voltage value of the first output level is greater than an output voltage value of the second output level, and generating the target instruction set based on the operation mode and the battery state information includes: responding to the working mode as a starting mode, and acquiring state information of the storage battery, wherein the state information of the storage battery comprises the current charge value of the storage battery; under the condition that the current charge value is smaller than a preset charge lower limit value, generating a first control instruction in a target instruction set, wherein the first control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a first output level; and under the condition that the current charge value is larger than the preset charge lower limit value and smaller than the preset charge upper limit value, generating a second control instruction in the target instruction set, wherein the second control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a second output level.
Optionally, the preset voltage output level further includes a third output level, an output voltage value of the third output level being located between an output voltage value of the first output level and an output voltage value of the second output level, generating the target instruction set based on the operation mode and the battery state information, further including: responding to the working mode as a driving mode, and acquiring state information of a storage battery; generating a first control instruction under the condition that the current charge value is smaller than a preset charge lower limit value; generating a second control instruction under the condition that the current charge value is larger than or equal to a preset charge upper limit value; and under the condition that the current charge value is larger than or equal to a preset charge lower limit value and smaller than a preset charge upper limit value, generating a third control instruction in the target instruction set, wherein the third control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a third output level.
Optionally, the preset voltage output level includes a fourth output level, an output voltage value corresponding to the fourth output level is zero, and the target instruction set is generated based on the working mode and the battery state information, and further includes: responding to the working mode as a limp mode, and acquiring state information of the storage battery; generating a fourth control instruction in the target instruction set under the condition that the current charge value is larger than the preset charge lower limit value, wherein the fourth control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a fourth output level; and generating a second control instruction under the condition that the current charge value is smaller than the preset charge lower limit value.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: responding to the working mode as a parking charging mode, and acquiring state information of a storage battery; generating a first control instruction under the condition that the current charge value is larger than a preset charge lower limit value; and generating a third control instruction under the condition that the current charge value is smaller than the preset charge lower limit value.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: responding to the working mode as an energy recovery mode, and acquiring power battery state information, wherein the power battery state information comprises a high-voltage charge value of a power battery; generating a first control instruction under the condition that the high-voltage charge value is larger than a high-voltage discharge threshold value, wherein the high-voltage discharge threshold value is the highest charge value which keeps a safe working state when the energy of a preset power battery is recovered; and generating one of the second control command and the third control command under the condition that the high-voltage charge value is smaller than the high-voltage discharge threshold value.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: and responding to the working mode as a fault mode, acquiring storage battery state information and a fault type of the vehicle, wherein the storage battery state information comprises a temperature value of a storage battery, and the fault type comprises at least one of the following components: the system comprises a storage battery detection system, a communication circuit and a vehicle body controller, wherein the storage battery detection system is abnormal, and the communication circuit is used for transmitting storage battery state information to the vehicle body controller; generating a fourth control instruction under the condition that the current charge value is larger than a preset temperature value; and when the fault type is at least one of abnormal storage battery detection system and abnormal communication line, generating a third control instruction.
According to another aspect of the embodiment of the present invention, there is also provided a control device for a DCDC converter, including: an acquisition module for acquiring the working mode and battery state information of the vehicle, wherein the operating mode includes at least one of: a start mode, a drive mode, a limp-home mode, a park charge mode, an energy recovery mode, a fault mode, and battery state information including at least one of: battery state information, power battery state information; the generating module is used for generating a target instruction set based on the working mode and the battery state information, wherein the target instruction set is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at different preset voltage output levels, and the preset voltage output levels are determined by the electric network characteristics of the vehicle.
According to still another aspect of the embodiments of the present invention, there is further provided a computer-readable storage medium, including a stored program, where the program, when run, controls a device in which the computer-readable storage medium is located to perform the method of any one of the preceding claims.
According to a further aspect of embodiments of the present invention there is also provided a vehicle comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the method of any of the preceding claims.
In the embodiment of the invention, a mode of acquiring the working mode and battery state information of the vehicle is adopted, a target instruction set is generated based on the working mode and the battery state information, and the voltage in the power battery is controlled to work at different preset voltage output levels by utilizing the target instruction set, so that the purpose of comprehensively determining the output voltage of the DCDC converter according to the working mode of the electric vehicle, the state of the storage battery and the state of the power battery is achieved, the DCDC converter is enabled to adaptively adjust the output voltage according to the mode switching of the vehicle, the drivability and economy of the vehicle in different modes are improved, the battery state information is further combined, the effective control of the vehicle low-voltage output is realized, the energy utility of the vehicle is fully improved, and the technical problem of low energy utility of the vehicle caused by single output control strategy of the existing DCDC converter is solved.
Detailed Description
In order that those skilled in the art will better understand the present invention, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in which it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present invention without making any inventive effort, shall fall within the scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and the claims of the present invention and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that the embodiments of the invention described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
In the prior art, a DCDC converter generally adopts a fixed output or gradual current-decreasing strategy to charge a storage battery, and the control method is single and cannot perform output control based on different running modes of a vehicle, so that the vehicle is difficult to ensure drivability and comfort in different scenes. In order to make DCDC converter operation more efficient and reliable, it is necessary to study and design the DCDC converter energy management strategy.
According to one embodiment of the present invention, there is provided an embodiment of a control method of a DCDC converter, it being noted that the steps shown in the flowchart of the drawings may be performed in a computer system such as a set of computer executable instructions, and that although a logical order is shown in the flowchart, in some cases the steps shown or described may be performed in an order different from that herein.
The method embodiments may be performed in an electronic device or similar computing device in a vehicle that includes a memory and a processor. Taking an example of operation on an electronic device of a vehicle, as shown in fig. 1, the electronic device of the vehicle may include one or more processors 102 (the processors may include, but are not limited to, a Central Processing Unit (CPU), a Graphics Processor (GPU), a Digital Signal Processing (DSP) chip, a Microprocessor (MCU), a programmable logic device (FPGA), a neural Network Processor (NPU), a Tensor Processor (TPU), an Artificial Intelligence (AI) type processor, etc., and a memory 104 for storing data. Optionally, the electronic apparatus of the automobile may further include a transmission device 106, an input/output device 108, and a display 110 for communication functions. It will be appreciated by those skilled in the art that the configuration shown in fig. 1 is merely illustrative and is not intended to limit the configuration of the electronic device of the vehicle described above. For example, the electronic device of the vehicle may also include more or fewer components than the above structural description, or have a different configuration than the above structural description.
The memory 104 may be used to store a computer program, for example, a software program of application software and a module, such as a computer program corresponding to a control method of the DCDC converter in the embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, implements the control method of the DCDC converter described above. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located relative to the processor 102, which may be connected to the mobile terminal via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the mobile terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as a NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device may be a Radio Frequency (RF) module, which is used to communicate with the internet wirelessly.
The display 110 may be, for example, a touch screen type Liquid Crystal Display (LCD). The liquid crystal display may enable a user to interact with a user interface of the mobile terminal. In some embodiments, the mobile terminal has a Graphical User Interface (GUI), and the user may interact with the GUI by touching finger contacts and/or gestures on the touch-sensitive surface, where the man-machine interaction functions optionally include the following interactions: creating web pages, drawing, word processing, making electronic documents, games, video conferencing, instant messaging, sending and receiving electronic mail, talking interfaces, playing digital video, playing digital music, and/or web browsing, etc., executable instructions for performing the above-described human-machine interaction functions are configured/stored in a computer program product or readable storage medium executable by one or more processors.
In this embodiment, a control method of a DCDC converter of an electronic device operating on the vehicle is provided, fig. 2 is a flowchart of a control method of a DCDC converter according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:
Step S10, acquiring the working mode and battery state information of the vehicle, wherein the working mode comprises at least one of the following steps: a start mode, a drive mode, a limp-home mode, a park charge mode, an energy recovery mode, a fault mode, and battery state information including at least one of: battery state information, power battery state information;
Step S20, generating a target instruction set based on the working mode and the battery state information, wherein the target instruction set is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at different preset voltage output levels, and the preset voltage output levels are determined by the electric network characteristics of the vehicle;
Through the steps, the mode of acquiring the working mode and the battery state information of the vehicle is adopted, a target instruction set is generated based on the working mode and the battery state information, and the target instruction set is utilized to control the DCDC converter to work the voltage in the power battery at different preset voltage output levels, so that the purpose of comprehensively determining the output voltage of the DCDC converter according to the working mode of the electric vehicle, the state of the storage battery and the state of the power battery is achieved, the DCDC converter is enabled to adaptively adjust the output voltage according to the mode switching of the vehicle, the drivability and economy of the vehicle in different modes are improved, the battery state information is further combined, the effective control of the vehicle power output is realized, the energy utility of the vehicle is fully improved, and the technical problem that the energy utility of the vehicle is low due to the single output control strategy of the existing DCDC converter is solved. In practice, by considering the working mode of the electric vehicle and the related state of the battery system of the electric vehicle, the DCDC converter reasonably outputs voltage, and reasonably plans the energy output of the low-voltage power supply of the 12V storage battery, the energy utility of the vehicle can be fully improved, and the running stability and reliability of the vehicle can be increased.
Fig. 3 shows a configuration diagram of an electric vehicle power system to which a control method of a DCDC converter may be applied. The power system mainly comprises assembly components such as a driving motor, an inverter, a high-voltage power battery, a DCDC (direct current) converter, a gearbox, a low-voltage 12V storage battery and the like, and also comprises controllers corresponding to the assembly components, wherein the controllers comprise a whole Vehicle Controller (VCU), a Motor Controller (MCU), a Battery Management System (BMS), a vehicle Body Controller (BCM), a 12V storage battery monitoring system (EBS) and the like.
An electric vehicle control system architecture and interface design is shown in fig. 4. The EBS sends the state signal of the 12V storage battery to the BCM through detecting the state of the low-voltage 12V storage battery, the BCM sends the state signal of the 12V storage battery reported by the EBS to the VCU through the CAN network, the BMS sends the current state information of the high-voltage power battery to the VCU through the CAN network, the DCDC sends the current state information of the DCDC to the VCU through the CAN network, the VCU controls the DCDC output voltage through developing the DCDC intelligent energy management module, integrates the current running mode of the whole vehicle, the state of the 12V storage battery and the state of the high-voltage power battery, the VCU sends an output voltage command to the DCDC, and the DCDC adjusts the output voltage value according to the VCU command, thereby meeting the electric quantity requirement of the whole vehicle and realizing DCDC intelligent control output. That is, the control system architecture uses the VCU as a core, and performs output control of the DCDC converter by integrating the vehicle mode and the battery state information, so that the output capability and the energy efficiency of the low-voltage storage battery can be reasonably planned.
Further, the VCU and BMS, DCDC, BCM communicate with each other via a CAN network, the key state, the ac and dc charge states and the VCU are connected by a sensor hard wire, and the EBS monitors the state of the 12V low voltage battery and then communicates with the BCM via a LIN wire. The various signals involved in the control system are described in the following table:
| Sequence number | Signal name | Network of which it is a part | Sender side | Receiving party |
| 1 | DCDC output current | CAN communication | DCDC | VCU |
| 2 | DCDC output voltage | CAN communication | DCDC | VCU |
| 3 | DCDC state | CAN communication | DCDC | VCU |
| 4 | DCDC temperature | CAN communication | DCDC | VCU |
| 5 | KeyState | Hard wire connection | Key with a key | VCU |
| 6 | HW_AC | Hard wire connection | Charger | VCU |
| 7 | HW_DC | Hard wire connection | Charger | VCU |
| 8 | Power battery SOC | CAN communication | BMS | VCU |
| 9 | 12V battery temperature | LIN communication | EBS | BCM |
| 10 | 12V storage battery SOC | LIN communication | EBS | BCM |
| 11 | 12V battery voltage | LIN communication | EBS | BCM |
| 12 | 12V battery current | LIN communication | EBS | BCM |
| 13 | Communication state of 12V storage battery | LIN communication | EBS | BCM |
| 14 | 12V battery fault condition | LIN communication | EBS | BCM |
| 15 | DCDC enable trigger | CAN communication | VCU | DCDC |
| 16 | DCDC output voltage request | CAN communication | VCU | DCDC |
In an alternative embodiment, after acquiring the operating mode and the battery state information of the vehicle, the DCDC control method includes: and acquiring a key state signal and vehicle charging information, and controlling the DCDC intelligent energy management module to be activated or deactivated based on the key state signal and the vehicle charging information. The key state signal comprises an on state signal and an off state signal, and the vehicle charging information comprises a fast charging signal and a slow charging signal. Specifically, the DCDC intelligent energy management module function activates when the VCU determines that any of the following conditions are met: (1) The vehicle key switch is in the On position, i.e., key status signal KeyState =on; (2) The vehicle key switch is in the Start gear position, i.e., key status signal KeyState = Start; (3) The vehicle key switch is in Off position, i.e., key status signal KeyState =off, and the charging gun is plugged into the AC charging device, and the slow charge hw_ac signal wakes up the overall vehicle controller, i.e., hw_ac=true. Further, the DCDC intelligent energy management module function exits when the VCU determines that all of the following conditions are met: (1) The vehicle key switch is in the Off position, i.e., key status signal KeyState = Off; (2) The charging gun is not inserted with an alternating current charging device, and the slow charging HW_AC signal does not wake up the whole vehicle controller, namely HW_AC=false; (3) The charging gun is not plugged into a direct current charging device, and the fast charging hw_dc signal does not wake up the whole vehicle controller, i.e. hw_dc=false. By adopting the technical scheme of the embodiment, the DCDC intelligent management activation and exit control method is realized by combining the key state signal and the charging signal, and the method fully considers the user intention and the vehicle state, and can close the DCDC intelligent energy management module when the output control of the DCDC is not needed.
Fig. 5 shows a schematic diagram of a pattern management distribution of an electric vehicle. The operating modes include a start mode, a drive mode, a limp home mode, an energy recovery mode, a park charge mode, and a fault mode. When the vehicle is in different working modes, the VCU realizes intelligent control voltage output of the DCDC by developing different control strategies.
In an alternative embodiment, the preset voltage output level is obtained by the whole vehicle network characteristics of the vehicle, for example, the DCDC preset voltage output level is divided into three levels, i.e. U1, U2 and U3, according to different vehicle types, engineering personnel can reasonably determine specific values of the preset voltage output level according to other electric assemblies of the vehicle, so that the DCDC preset voltage output is suitable for electric connection of the whole electric network of the vehicle and other assemblies. For example, u1=11v, u2=14v, u3=16v.
Optionally, the preset voltage output level includes a first output level and a second output level, an output voltage value of the first output level is greater than an output voltage value of the second output level, and generating the target instruction set based on the operation mode and the battery state information includes: responding to the working mode as a starting mode, and acquiring state information of the storage battery, wherein the state information of the storage battery comprises the current charge value of the storage battery; under the condition that the current charge value is smaller than a preset charge lower limit value, generating a first control instruction in a target instruction set, wherein the first control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a first output level; and under the condition that the current charge value is larger than the preset charge lower limit value and smaller than the preset charge upper limit value, generating a second control instruction in the target instruction set, wherein the second control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a second output level. Under the condition that the current charge value is smaller than the preset charge lower limit value, the storage battery can be rapidly charged by selecting the first output level so as to be prepared for meeting the low-voltage power consumption requirement. Under the condition that the current charge value is larger than the preset charge lower limit value and smaller than the preset charge upper limit value, the second output level is selected, so that the power requirement in the starting mode can be preferentially ensured, and the drivability of the vehicle during starting is ensured.
Alternatively, the first output level is U3, preferably 16V. The second output level is U1, preferably 11V. The preset output level also includes a third output level of U2, preferably 14V. Specifically, as shown in fig. 6, which shows a flowchart of a DCDC intelligent control method in a start mode, after VCU controls DCDC enable triggering, DCDC output voltage u=u2=14v can be controlled by default; when the 12V battery SOC is lower than the lower limit value, VCU controls DCDC output voltage u=u3=16v; when the 12V battery SOC is between the upper and lower limit values, VCU controls DCDC output voltage u=u1=11v; if the two cases do not occur, the DCDC output voltage u=u2=14v is continuously controlled.
Optionally, the preset voltage output level further includes a third output level, an output voltage value of the third output level being located between an output voltage value of the first output level and an output voltage value of the second output level, generating the target instruction set based on the operation mode and the battery state information, further including: responding to the working mode as a driving mode, and acquiring storage battery state information, wherein the storage battery state information comprises the current charge value of the storage battery; generating a first control instruction under the condition that the current charge value is smaller than a preset charge lower limit value; generating a second control instruction under the condition that the current charge value is larger than or equal to a preset charge upper limit value; and under the condition that the current charge value is larger than or equal to a preset charge lower limit value and smaller than a preset charge upper limit value, generating a third control instruction in the target instruction set, wherein the third control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a third output level. The third output level is U2, preferably 14V. Under the condition that the current charge value is smaller than the preset charge lower limit value, the storage battery is rapidly charged so that the storage battery meets the low-voltage requirement; under the condition that the current charge value is greater than or equal to a preset charge upper limit value, the storage battery is charged at a retarded speed so as to enable the storage battery to approach to charge balance and reduce; and under the condition that the current charge value is larger than or equal to the preset charge lower limit value and smaller than the preset charge upper limit value, adopting the third output level to carry out output control, and balancing between the output of the storage battery and the output of the power battery can be considered. Specifically, as shown in fig. 7, a flowchart of the DCDC intelligent control method in the driving mode is shown, in which VCU controls DCDC output voltage u=u3=16v when the initial 12V battery SOC is smaller than the lower limit value; when the initial 12V battery SOC is greater than the upper limit value, VCU controls DCDC output voltage u=u1=11v; when the initial 12V battery SOC is between the upper and lower limits, VCU controls DCDC output voltage u=u1=14v; when the 12V battery SOC is equal to the lower limit value, VCU controls DCDC output voltage u=u2=14v; when the 12V battery SOC is equal to the upper limit value, VCU controls DCDC output voltage u=u1=11v.
Optionally, the preset voltage output level includes a fourth output level, an output voltage value corresponding to the fourth output level is zero, and the target instruction set is generated based on the working mode and the battery state information, and further includes: responding to the working mode as a limp-home mode, and acquiring state information of the storage battery, wherein the state information of the storage battery comprises the current charge value of the storage battery; generating a fourth control instruction in the target instruction set under the condition that the current charge value is larger than the preset charge lower limit value, wherein the fourth control instruction is used for controlling the DCDC converter to transmit the voltage in the power battery to the storage battery at a fourth output level; and generating a second control instruction under the condition that the current charge value is smaller than the preset charge lower limit value. As shown in fig. 8, a flowchart of a DCDC intelligent control method in a limp-home mode is shown, wherein when a 12V battery charge value is greater than a lower limit value, the VCU controls DCDC to enable off, thereby saving electric energy output of the high-voltage power battery and power consumption, so as to meet a limp-home driving requirement of a driver; when the charge value of the 12V storage battery is smaller than the lower limit value, the VCU controls the DCDC output voltage U=U1=11V, and the electric energy output of the high-voltage power battery is saved while the basic power consumption requirement of the whole vehicle low-voltage electric appliance is met, so that the limp home driving requirement of a driver is met.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: responding to the working mode as a parking charging mode, and acquiring state information of the storage battery, wherein the state information of the storage battery comprises the current charge value of the storage battery; generating a first control instruction under the condition that the current charge value is larger than a preset charge lower limit value; and generating a third control instruction under the condition that the current charge value is smaller than the preset charge lower limit value. Fig. 9 shows a flowchart of the DCDC intelligent control method in the parking mode, in which when the 12V battery SOC is less than the lower limit value, VCU controls the DCDC output voltage u=u3=16v so as to charge the 12V battery as soon as possible; when the 12V battery SOC is greater than the lower limit value, the VCU controls the DCDC output voltage u=u2=14v so as to meet the power consumption requirement of the low-voltage electric appliance of the whole vehicle.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: responding to the working mode as an energy recovery mode, and acquiring power battery state information, wherein the power battery state information comprises a high-voltage charge value of a power battery; generating a first control instruction under the condition that the high-voltage charge value is larger than a high-voltage discharge threshold value, wherein the high-voltage discharge threshold value is the highest charge value which keeps a safe working state when the energy of a preset power battery is recovered; and generating one of the second control command and the third control command under the condition that the high-voltage charge value is smaller than the high-voltage discharge threshold value. As shown in fig. 9, a flowchart of a DCDC intelligent control method in the energy recovery mode is shown, wherein when the vehicle enters the energy recovery mode from the driving mode, the DCDC output voltage may be U1 or U2, if the vehicle meets the energy recovery related condition, the energy recovery function of the vehicle will be triggered, at this time, the VCU determines whether the SOC of the high-voltage power battery is greater than a preset high-voltage discharge threshold (e.g. 80%) by receiving the SOC of the high-voltage power battery sent by the BMS, and if the SOC is greater than the preset high-voltage discharge threshold, the VCU controls the DCDC output voltage u=u3=16v; when the vehicle energy recovery function is finished, the vehicle exits the energy recovery mode and enters the driving mode, or whether the high-voltage power battery SOC is smaller than a preset value (e.g., 80%), and when one of the two conditions is met, the VCU controls the DCDC output voltage u=u1=11v or u=u2=14v (the output voltage needs to be determined according to the DCDC intelligent control method in the driving mode). By adopting the technical scheme of the embodiment, the electric quantity of the power battery is monitored, and when the electric quantity of the power battery deviates from the balance, the low-voltage storage battery is controlled to discharge rapidly so as to realize normal operation of energy recovery.
Optionally, generating the target instruction set based on the operation mode and the battery state information further comprises: and responding to the working mode as a fault mode, acquiring storage battery state information and a fault type of the vehicle, wherein the storage battery state information comprises a temperature value of a storage battery, and the fault type comprises at least one of the following components: the system comprises a storage battery detection system, a communication circuit and a vehicle body controller, wherein the storage battery detection system is abnormal, and the communication circuit is used for transmitting storage battery state information to the vehicle body controller; generating a fourth control instruction under the condition that the current charge value is larger than a preset temperature value; and when the fault type is at least one of abnormal storage battery detection system and abnormal communication line, generating a third control instruction. Fig. 10 shows a flowchart of the DCDC intelligent control method in the fault mode, in which when the vehicle is in the aforementioned 5 modes and the DCDC is in the corresponding intelligent energy management control process, if the EBS detects that the temperature of the 12V battery is greater than 70 degrees (calibratable value), the DCDC is controlled to be enabled to be turned off. If the EBS detects that the temperature of the 12V battery is less than 70 degrees (calibratable value), the DCDC intelligent management control is continuously maintained. When the EBS has a status failure or LIN communication abnormality, the VCU controls the DCDC output voltage u=u2=14v. When the EBS state fault is released, the VCU resumes DCDC intelligent energy management control.
By adopting the technical scheme, the DCDC intelligent energy management control system architecture and the interface are designed, the running states of the electric automobile in different working modes are considered, different DCDC voltage control output methods are developed through the DCDC intelligent energy management control strategy design in different working modes, the effective control of the vehicle low-voltage power output is realized, the energy utility of the vehicle can be fully improved, and therefore better drivability and economy are provided for users.
Fig. 12 is a block diagram illustrating a control apparatus of a DCDC converter according to an embodiment of the present invention, as shown in fig. 12, the apparatus including: the acquiring module 51 is configured to acquire an operation mode and battery state information of the vehicle, where the operation mode includes at least one of the following: a start mode, a drive mode, a limp-home mode, a park charge mode, an energy recovery mode, a fault mode, and battery state information including at least one of: battery state information, power battery state information; the generating module 52 is configured to generate a target instruction set based on the operation mode and the battery state information, where the target instruction set is configured to control the DCDC converter to transmit the voltage in the power battery to the battery at different preset voltage output levels, where the preset voltage output levels are determined by the electrical network characteristics of the vehicle.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; or the above modules may be located in different processors in any combination.
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
An embodiment of the invention also provides a vehicle comprising a memory in which a computer program is stored and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
The foregoing embodiment numbers of the present invention are merely for the purpose of description, and do not represent the advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present invention, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and the division of units may be a logic function division, and there may be another division manner in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in the embodiments of the present invention may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied essentially or in part or all of the technical solution or in part in the form of a software product stored in a storage medium, including instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which are intended to be comprehended within the scope of the present invention.