Management system and management method for dormant electric quantity of whole vehicle

Abstract

The invention discloses a whole vehicle dormancy electric quantity management system and method, the management system comprises an MCU controller, the MCU controller is connected with a switch, a current detection module, an NMOS transistor and a PMOS transistor, after the NMOS transistor and the PMOS transistor are connected in parallel, one end is connected with the current detection module, the other end is connected with a whole vehicle electric load, and the whole vehicle electric load is connected with the current detection module. And the switch is connected with the current detection module. According to the whole vehicle dormancy electric quantity management system and method, the electric quantity detection and control function after the whole vehicle is switched to the dormancy state can be achieved, the current consumption after power-off is low, the energy-saving effect is good, the standing time of the vehicle is prolonged, and meanwhile the service life of a storage battery is prolonged; in the aspect of power management, fault information can be reported and processed in time, and the reliability of the vehicle is improved; the method provided by the invention has good universality and transportability.

Description

Technical Field

[0001] The present invention relates to the technical field of automobile power management, and more specifically, to a vehicle dormant power management system and a management method. Background Art

[0002] Most current automotive electrical boxes use traditional fuses and relays, which only provide functions such as fusing or circuit breaking. Some models have smart fuses that manage power consumption after power-on, but lack power-saving management after power-off. While some models manage power consumption after both power-on and power-off, the post-power-off power consumption is high, resulting in poor energy conservation.

[0003] Therefore, there is an urgent need for a vehicle dormant power management system and management method. Summary of the Invention

[0004] The purpose of the present invention is to provide a vehicle dormant power management system and management method to solve the problems in the above-mentioned prior art. It can realize the power detection and control function after the vehicle switches to dormancy, reduce current consumption after power-off, have good energy-saving effect, improve the vehicle's static time, and extend the battery life.

[0005] The present invention provides a vehicle dormant power management system, which includes: an MCU controller, the MCU controller is respectively connected to a switch, a current detection module, an NMOS tube and a PMOS tube, after the NMOS tube and the PMOS tube are connected in parallel, one end is connected to the current detection module, and the other end is connected to the vehicle power load, the switch is connected to the current detection module, and a power supply is provided between the switch and the current detection module.

[0006] In the vehicle dormant power management system as described above, preferably, an analog-to-digital converter is provided between the MCU controller and the current detection module.

[0007] In the above-mentioned vehicle dormant power management system, preferably, a first driver chip is provided between the MCU controller and the NMOS tube, and the first driver chip is also connected to the switch.

[0008] In the above-mentioned vehicle dormant power management system, preferably, a second driver chip is provided between the MCU controller and the PMOS tube.

[0009] The present invention also provides a method for managing vehicle dormant power using the above management system, which includes the following steps:

[0010] When the vehicle is powered on, the NMOS tube is closed and the PMOS tube is open, and the current flows through the NMOS tube to provide power to the vehicle's electrical loads;

[0011] After the vehicle is powered off and in sleep mode, the NMOS transistor is disconnected and the PMOS transistor is working to supply power to the dormant MCU controller.

[0012] After the vehicle is powered off, the working status of the NMOS and PMOS tubes is controlled according to the current detection results, and different fault handling strategies are adopted for MCU controllers with different functional safety levels.

[0013] The above-mentioned vehicle dormant power management method, wherein preferably, when the vehicle is powered on, the NMOS transistor is closed, the PMOS transistor is disconnected, and the current passes through the NMOS transistor to provide power to the vehicle's electrical loads, includes:

[0014] When the vehicle is powered on, the NMOS tube drives the switch to be turned on and off through the first driver chip, the NMOS tube is closed, and the PMOS tube is disconnected. The current passes through the NMOS tube to provide power to the vehicle's electrical load. At the same time, the current detection module detects the current and voltage information, reports abnormal situations, and executes actions.

[0015] The above-mentioned vehicle dormant power management method, wherein preferably, after the powered-off vehicle goes into dormancy, the NMOS tube is disconnected and the PMOS tube is operated to supply power to the dormant MCU controller, includes:

[0016] After the vehicle is powered off and goes into sleep mode, the NMOS tube is disconnected, and the first driver chip of the NMOS tube is also powered off through the switch. At this time, the PMOS tube works to supply power to the dormant MCU controller.

[0017] In the above-mentioned vehicle dormant power management method, preferably, after the vehicle is powered off, the operating states of the NMOS transistor and the PMOS transistor are controlled according to the current detection result, and different fault handling strategies are adopted for MCU controllers with different functional safety levels, including:

[0018] Step S31: After the vehicle is powered off, current information is detected by a current detection module;

[0019] Step S32: If the current exceeds the first set threshold, execute step S33; if not, return to step S31;

[0020] Step S33: determine whether the current exceeds a second set threshold, if so, execute step S34, if not, execute step S35;

[0021] Step S34: The MCU controller is awakened, the PMOS tube is disconnected, and the NMOS tube is working;

[0022] Step S35: Determine whether the MCU controller is a load controller with a high functional safety level. If so, execute step S36; if not, execute step S37;

[0023] Step S36: Only report the exceeding information;

[0024] Step S37: While reporting the exceeding-standard information, the MCU controller is restarted or powered off.

[0025] The present invention provides a vehicle dormant power management system and management method, which can realize the power detection and control functions after the vehicle switches to dormancy, reduce current consumption after power-off, achieve good energy-saving effect, increase the vehicle's stationary time, and extend the battery life; in terms of power management, fault information can be reported and processed in a timely manner, thereby improving the reliability of the vehicle; the present invention has good versatility and portability. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention will be further described below with reference to the accompanying drawings, in which:

[0027] Figure 1 This is a result block diagram of an embodiment of the vehicle dormant power management system provided by the present invention;

[0028] Figure 2 This is a flow chart of an embodiment of the vehicle dormant power management method provided by the present invention;

[0029] Figure 3 This is a logic diagram of an embodiment of the vehicle dormant power management method provided by the present invention.

[0030] Explanation of the accompanying symbols: 1-MCU controller, 2-switch, 3-power supply, 4-current detection module, 5-first driver chip, 6-NMOS tube, 7-PMOS tube, 8-second driver chip, 9-vehicle power load, 10-analog-to-digital converter. DETAILED DESCRIPTION

[0031] Various exemplary embodiments of the present disclosure will now be described in detail with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and is in no way intended to limit the present disclosure, its application, or use. The present disclosure can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present disclosure thorough and complete and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of parts and steps, the composition of materials, numerical expressions, and numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary and not as limiting.

[0032] The terms "first," "second," and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are simply used to distinguish different parts. Terms such as "include" or "comprising" mean that the elements preceding the term include the elements listed after the term, and do not exclude the possibility of also including other elements. Terms such as "upper," "lower," and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0033] In the present disclosure, when a specific component is described as being located between a first component and a second component, there may or may not be an intervening component between the specific component and the first component or the second component. When a specific component is described as being connected to another component, the specific component may be directly connected to the other component without an intervening component, or may not be directly connected to the other component but have an intervening component.

[0034] All terms (including technical or scientific terms) used in this disclosure have the same meaning as those understood by one of ordinary skill in the art to which this disclosure belongs, unless otherwise specifically defined. It should also be understood that terms defined in, for example, general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or highly formal sense, unless explicitly defined herein.

[0035] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0036] Most current technical solutions utilize traditional fuses that only have a melting or circuit-breaking function, and lack the ability to detect and control the power consumption of the vehicle's electrical loads when they are turned on or after they have been put into hibernation. Some models feature smart fuses that manage power consumption after power-on, but not after power-off. Therefore, current technical solutions lack this power-off energy conservation function.

[0037] like Figure 1 As shown, the vehicle dormant power management system provided in this embodiment includes: an MCU controller 1, the MCU controller 1 is respectively connected to a switch 2, a current detection module 4, an NMOS tube 6 and a PMOS tube 7, the NMOS tube 6 and the PMOS tube 7 are connected in parallel, one end of the NMOS tube 6 and the PMOS tube 7 is connected to the current detection module 4, and the other end is connected to the vehicle power load 9, the switch 2 is connected to the current detection module 4, and a power supply 3 is arranged between the switch 2 and the current detection module 4.

[0038] Furthermore, an analog-to-digital converter 10 is provided between the MCU controller 1 and the current detection module 4 for performing analog-to-digital conversion on the current detection result of the current detection module 4 .

[0039] Furthermore, a first driver chip 5 is provided between the MCU controller 1 and the NMOS transistor 6 for driving the NMOS transistor 6 on and off. The first driver chip 5 is also connected to the switch 2. A second driver chip 8 is provided between the MCU controller 1 and the PMOS transistor 7 for driving the PMOS transistor 7 on and off.

[0040] like Figure 2 As shown, the vehicle dormant power management method provided by this embodiment includes the following steps during actual execution:

[0041] Step S1: When the vehicle is powered on, the NMOS transistor 6 is closed and the PMOS transistor 7 is opened, and current passes through the NMOS transistor 6 to provide power to the vehicle electrical load 9.

[0042] Specifically, when the vehicle is powered on, the NMOS tube 6 drives the switch 2 to be turned on and off through the first driver chip 5, the NMOS tube 6 is closed, and the PMOS tube 7 is disconnected. The current passes through the NMOS tube 6 to provide power to the vehicle's electrical load 9. At the same time, the current detection module 4 detects the current and voltage information, reports abnormal situations, and executes actions.

[0043] Step S2: After the vehicle is powered off and in sleep mode, the NMOS transistor 6 is disconnected and the PMOS transistor 7 is turned on to supply power to the sleep MCU controller 1.

[0044] Specifically, after the vehicle is powered off and in sleep mode, the NMOS tube 6 is disconnected, and the first driver chip 5 of the NMOS tube 6 is also powered off through the switch 2 to achieve energy saving. At this time, the PMOS tube 7 works to supply power to the dormant MCU controller 1.

[0045] Since the operating current of the PMOS tube 7 is very small, further energy saving effect is achieved.

[0046] Step S3: After the vehicle is powered off, the working states of the NMOS transistor 6 and the PMOS transistor 7 are controlled according to the current detection result, and different fault handling strategies are adopted for the MCU controllers 1 with different functional safety levels.

[0047] In one embodiment of the vehicle dormant power management system and management method of the present invention, step S3 may specifically include:

[0048] Step S31: After the vehicle is powered off, the current information is detected by the current detection module 4.

[0049] Step S32: If the current exceeds the first set threshold (quiescent current exceeds the standard), execute step S33; if not, return to step S31.

[0050] Step S33: determine whether the current exceeds the second set threshold, if so, execute step S34, if not, execute step S35.

[0051] Step S34: The MCU controller 1 is awakened, the PMOS tube 7 is disconnected, and the NMOS tube 6 is in operation.

[0052] Step S34 is the same as the vehicle power-on workflow.

[0053] Step S35: Determine whether the MCU controller is a load controller with a high functional safety level. If so, execute step S36; if not, execute step S37.

[0054] Step S36: Only report the exceeding standard information.

[0055] Step S37: While reporting the exceeding-standard information, the MCU controller 1 is restarted or powered off.

[0056] In this invention, after the vehicle is powered off, current information is monitored. If the current exceeds a first set threshold (quiescent current exceeds the limit), only the excess current information is reported to the load controller with a high functional safety level. For load controllers with a low functional safety level, the excess current information is reported and the controller is restarted or powered off. If the current exceeds a set threshold 2 (the controller is awakened), the PMOS transistor is disconnected and the NMOS transistor is closed (similar to the vehicle power-on process).

[0057] The vehicle dormant power management system and management method provided in the embodiments of the present invention can realize the power detection and control functions after the vehicle switches to dormancy, reduce current consumption after power-off, achieve good energy-saving effects, increase the vehicle's stationary time, and extend the battery life; in terms of power management, fault information can be reported and processed in a timely manner, thereby improving vehicle reliability; the present invention has good versatility and portability.

[0058] Thus far, various embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details known in the art have not been described. Based on the above description, those skilled in the art can fully understand how to implement the technical solutions disclosed herein.

[0059] Although some specific embodiments of the present disclosure have been described in detail through examples, those skilled in the art will understand that the above examples are for illustration only and are not intended to limit the scope of the present disclosure. Those skilled in the art will understand that the above embodiments may be modified or some technical features may be replaced with equivalents without departing from the scope and spirit of the present disclosure. The scope of the present disclosure is defined by the appended claims.

Claims

1. A vehicle dormant power management system, characterized in that: include: An MCU controller is respectively connected to a switch, a current detection module, an NMOS tube and a PMOS tube. After the NMOS tube and the PMOS tube are connected in parallel, one end is connected to the current detection module and the other end is connected to the vehicle power load. The switch is connected to the current detection module, and a power supply is provided between the switch and the current detection module.

2. The vehicle dormant power management system according to claim 1, characterized in that: An analog-to-digital converter is provided between the MCU controller and the current detection module.

3. The vehicle dormant power management system according to claim 1, characterized in that: A first driver chip is provided between the MCU controller and the NMOS tube, and the first driver chip is also connected to the switch.

4. The vehicle dormant power management system according to claim 1, characterized in that: A second driving chip is arranged between the MCU controller and the PMOS tube.

5. A method for managing vehicle dormant power using the system according to any one of claims 1 to 4, characterized in that: include: When the vehicle is powered on, the NMOS tube is closed and the PMOS tube is open, and the current flows through the NMOS tube to provide power to the vehicle's electrical loads; After the vehicle is powered off and in sleep mode, the NMOS transistor is disconnected and the PMOS transistor is working to supply power to the dormant MCU controller. After the vehicle is powered off, the working status of the NMOS and PMOS tubes is controlled according to the current detection results, and different fault handling strategies are adopted for MCU controllers with different functional safety levels.

6. The vehicle dormant power management method according to claim 5, characterized in that: When the vehicle is powered on, the NMOS tube is closed and the PMOS tube is opened, and current flows through the NMOS tube to provide power to the vehicle's electrical loads, including: When the vehicle is powered on, the NMOS tube drives the switch to be turned on and off through the first driver chip, the NMOS tube is closed, and the PMOS tube is disconnected. The current passes through the NMOS tube to provide power to the vehicle's electrical load. At the same time, the current detection module detects the current and voltage information, reports abnormal situations, and executes actions.

7. The vehicle dormant power management method according to claim 5, characterized in that: After the vehicle is powered off and in sleep mode, the NMOS transistor is disconnected and the PMOS transistor is activated to supply power to the dormant MCU controller, including: After the vehicle is powered off and goes into sleep mode, the NMOS tube is disconnected, and the first driver chip of the NMOS tube is also powered off through the switch. At this time, the PMOS tube works to supply power to the dormant MCU controller.

8. The vehicle dormant power management method according to claim 5, characterized in that: After the vehicle is powered off, the operating states of the NMOS and PMOS transistors are controlled based on the current detection results, and different fault handling strategies are adopted for MCU controllers with different functional safety levels, including: Step S31: After the vehicle is powered off, current information is detected by a current detection module; Step S32: If the current exceeds the first set threshold, execute step S33; if not, return to step S31; Step S33: determine whether the current exceeds a second set threshold, if so, execute step S34, if not, execute step S35; Step S34: The MCU controller is awakened, the PMOS tube is disconnected, and the NMOS tube is working; Step S35: Determine whether the MCU controller is a load controller with a high functional safety level. If so, execute step S36; if not, execute step S37; Step S36: Only report the exceeding information; Step S37: While reporting the exceeding-standard information, the MCU controller is restarted or powered off.

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