A vehicle-mounted 220V inverter control method with power protection

Abstract

The present invention discloses a vehicle-mounted 220V inverter control method with electric quantity protection, comprising the following steps: S1. The engine management system sends vehicle information, start-stop information, and engine status information to the body control module; S2. The body control module sends an enable signal to control the output command and the maximum output power of the 220V inverter according to the power gear, energy level, and engine status; S3. The 220V inverter determines whether to allow output according to the relay IG2 state and the enable signal of the body control module; S4. After the 220V inverter is running, it detects whether it exceeds the maximum power allowed to be output by the body control module, and feeds back a load signal to the body control module; S5. The body control module receives the load power signal fed back by the 220V inverter, determines whether to send a start-stop prohibition signal to the engine management system, receives a 220V inverter fault signal, and performs diagnostic management. The present invention effectively protects the user's battery life and the normal use of the automatic start-stop function.

Description

Technical Field

[0001] The invention relates to the technical field of automotive electronic and electrical appliances, and in particular to a vehicle-mounted 220V inverter control method with electric quantity protection. Background Art

[0002] The on-board 220V inverter controller generally uses input voltage comparison as a low-battery protection solution. The existing technical solutions cannot accurately determine the SOF (health state) and SOC (charge state) of the vehicle battery, and can only protect against the problem of failure to start due to power feeding. For models with start-stop (engine automatic start-stop) configuration, when users continue to use the 220V inverter, the vehicle cannot generate electricity during the start-stop period, which will cause excessive discharge of the battery, thereby affecting the failure of the start-stop function and shortening the battery life. Summary of the invention

[0003] The purpose of the present invention is to solve the above problems and to provide a vehicle-mounted 220V inverter control method with power protection. Through the vehicle-mounted local area network LIN-CAN data interaction, under the control of the body control module, the 220V inverter can receive the vehicle's working mode, battery status and other vehicle working states, and perform output power protection or shutdown of the 220V inverter in real time, thereby effectively protecting the vehicle's start-stop function and the health of the battery power.

[0004] A vehicle-mounted 220V inverter control method with power protection comprises the following steps:

[0005] S1. The engine management system sends vehicle information, start-stop information, and engine status information to the body control module: The vehicle information, start-stop information, and engine status information sent by the engine management system are sent to the body control module via the controller area network CAN;

[0006] S2. The body control module sends an enable signal to control the output command and maximum output power of the 220V inverter according to the power gear, energy level, and engine status: the body control module controls the output command of the 220V inverter according to the power gear and energy level, and the body control module controls the maximum output power of the 220V inverter according to the engine status, and sends the brightness mode of the 220V inverter indicator light and the vehicle mode signal to the local area network LIN branch line in the form of an enable signal to the 220V inverter;

[0007] S3.220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module: 220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module;

[0008] S4. After the 220V inverter is allowed to output, it detects whether it exceeds the maximum power allowed by the 220V inverter and feeds back the load signal to the body control module: the 220V inverter performs self-diagnosis, feeds back the diagnostic signal to the local area network LIN, monitors the output power, and feeds back the output power level value to the local area network LIN, and cuts off the output when it detects that the power exceeds the limit; controls the lighting of the 220V inverter working indicator light, and determines the brightness of the working indicator light according to the 220V inverter indicator light brightness mode signal received from the body control module;

[0009] S5. The body control module receives the load power signal fed back by the 220V inverter, determines whether to send a start / stop prohibition signal to the engine management system, receives the 220V inverter fault signal, and performs diagnostic management: the engine management system receives the 220V inverter start / stop prohibition signal sent by the body control module, prohibits automatic shutdown, and sends a start / stop prompt signal to the instrument cluster module IC of the engine management system. When the 220V inverter detects that the battery voltage is lower than 11V, it will cut off the output.

[0010] Specifically, in step S2, when the power gear is on and the energy level is level 0, the body control module determines that the enabling condition is met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output permission instruction; when the power gear is off and the energy level is not level 0, the body control module determines that the enabling condition is not met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output disallowance instruction.

[0011] Specifically, in step S2, the body control module needs to control the maximum power allowed to be output by the 220V inverter according to the engine status. When the enable signal received by the 220V inverter is to allow output, the engine operating state is running, and the inverter output power is 400 watts; the engine operating state is non-operating, and the inverter output power is 200 watts; when the enable condition received by the 220V inverter is not met, the engine management system sends an engine status signal of running or non-operating. At this time, the body control module sends a power limit signal to control the 220V inverter to shut down.

[0012] Specifically, in step S3, the 220V inverter determines whether to allow output according to the state of relay IG2 and the enable signal of the body control module: when the relay IG2 signal is high and effective, the enable signal received by the 220V inverter is that the output condition of the 220V inverter is not equal to 0, the 220V inverter is allowed to output; when the received enable signal is that the output condition of the 220V inverter is equal to 0, the 220V inverter is not allowed to output; when the local area network LIN signal of the 220V inverter is disconnected, when the local area network LIN signal is not detected when powered on, or before the local area network LIN signal is disconnected, the signal received by the 220V inverter is that the output condition of the 220V inverter is not equal to 0, the 220V inverter continues to output for 20 minutes after the local area network LIN signal is disconnected; when the signal received by the 220V inverter before the local area network LIN signal is disconnected is that the output condition of the 220V inverter is equal to 0, the 220V inverter remains not allowed to output after the local area network LIN signal is disconnected.

[0013] Specifically, in step S4, when the 220V inverter detects that the output power exceeds the limit power, it will cut off the output, and then restart the output after 5 seconds. The output power will be detected again. If the output power is lower than the limit power, it will be output normally. If it still exceeds the limit power, the output will be cut off again. This will be repeated 5 times. If overpower is still detected for the 5th time, it is necessary to power off and then power on again to allow output.

[0014] Specifically, in step S5, if the 220V inverter detects that the body control module is offline, the 220V inverter limits the maximum output power to 100 watts under the premise that the 220V inverter is allowed to be enabled; for vehicles with a start-stop function, the start-stop function is in the on state, and the body control module needs to control whether the 220V inverter enters the start-stop mode according to the start-stop status signal. In the start-stop mode, the maximum output power of the 220V inverter is limited to 200 watts, and during the startup process, the 220V inverter detects that the battery voltage is temporarily lower than 11V and maintains output. In the non-start-stop mode, the maximum output power of the 220V inverter is the value set by the power limit signal sent by the body control module. The 220V inverter cuts off the output when it detects that the battery voltage is lower than 11V.

[0015] Specifically, in step S5, the start-stop signal is judged in the following manner: when the vehicle has no start-stop function, the 220V inverter operates in the non-start-stop mode; when the vehicle has the start-stop function, further judgment is required: when the vehicle start-stop function is turned off, the 220V inverter executes the non-start-stop mode; when the vehicle start-stop function is turned on and the engine is in an active state, the body control module sends a signal to allow output to the 220V inverter, and the 220V inverter executes the non-start-stop mode; when the engine is in an automatic stop state, the body control module sends a rapid output signal to the 220V inverter, and the 220V inverter executes the start-stop mode; when the engine is in an automatic stop state, the body control module sends a rapid output signal to the 220V inverter, and the 220V inverter executes the start-stop mode; When the engine is in a stopped state, the body control module sends a signal to the 220V inverter that output is not allowed, and the 220V inverter executes the start-stop mode; when the engine is in a restart state, the body control module sends a signal to the 220V inverter to increase the output power, and the 220V inverter executes the start-stop mode; when the engine is in a standby state, the body control module sends a signal to the 220V inverter that output is allowed, and the 220V inverter executes a non-start-stop mode; when the engine is in a start-stop function off state, the body control module sends a signal to the 220V inverter that output is allowed, and the 220V inverter executes a non-start-stop mode.

[0016] The beneficial effects of the present invention are:

[0017] The present invention discloses a vehicle-mounted 220V inverter control method with power protection, which adds new functions on the basis of the original 220V inverter controlled by a hard-wire switch by formulating the whole vehicle signal interaction logic and the real-time strategy of the component functions. By judging the engine start-stop working state, the allowable power range, and the protection logic of function disabling, the user's battery life and the normal use of the automatic start-stop function are effectively protected, and the problem of the whole vehicle battery life being damaged due to the user not disconnecting the 220V inverter power intake interface is avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a flow chart of a vehicle-mounted 220V inverter control method with power protection;

[0019] Figure 2 This is a structural block diagram of a vehicle-mounted 220V inverter control system with power protection. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and examples. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0021] See also Figure 1 As shown, a vehicle-mounted 220V inverter control method with power protection includes the following steps:

[0022] S1. The engine management system sends vehicle information, start-stop information, and engine status information to the body control module: The vehicle information, start-stop information, and engine status information sent by the engine management system are sent to the body control module via the controller area network CAN;

[0023] S2. The body control module sends an enable signal to control the output command and maximum output power of the 220V inverter according to the power gear, energy level, and engine status: the body control module controls the output command of the 220V inverter according to the power gear and energy level, and the body control module controls the maximum output power of the 220V inverter according to the engine status, and sends the brightness mode of the 220V inverter indicator light and the vehicle mode signal to the local area network LIN branch line in the form of an enable signal to the 220V inverter;

[0024] S3.220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module: 220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module;

[0025] S4. After the 220V inverter is allowed to output, it detects whether it exceeds the maximum power allowed by the 220V inverter and feeds back the load signal to the body control module: the 220V inverter performs self-diagnosis, feeds back the diagnostic signal to the local area network LIN, monitors the output power, and feeds back the output power level value to the local area network LIN, and cuts off the output when it detects that the power exceeds the limit; controls the lighting of the 220V inverter working indicator light, and determines the brightness of the working indicator light according to the 220V inverter indicator light brightness mode signal received from the body control module;

[0026] S5. The body control module receives the load power signal fed back by the 220V inverter, determines whether to send a start / stop prohibition signal to the engine management system, receives the 220V inverter fault signal, and performs diagnostic management: the engine management system receives the 220V inverter start / stop prohibition signal sent by the body control module, prohibits automatic shutdown, and sends a start / stop prompt signal to the instrument cluster module IC of the engine management system. When the 220V inverter detects that the battery voltage is lower than 11V, it will cut off the output.

[0027] See also Figure 2, is a system structure block diagram of the present invention, the body control module is responsible for receiving the start status signal and the start-stop status signal of the engine management system, and controlling the operation of the 220V inverter in combination with the energy management; receiving the load power signal fed back by the 220V inverter, and judging whether to send a start-stop prohibition signal to the engine management system; receiving the fault signal of the 220V inverter, and performing diagnostic management; sending the 220V inverter indicator light brightness mode signal to the 220V inverter according to the position light status; sending the vehicle mode signal to the 220V inverter; the 220V inverter is responsible for controlling the serial network LIN control signal sent by the relay IG2 status and the body control module. Whether to allow power supply to electrical appliances and the maximum output power; perform self-diagnosis and feed back diagnostic signals to the local area network LIN bus; monitor its own output power and feed back the output power level value to the local area network LIN bus, and cut off the output when the power limit is exceeded; control the lighting of the 220V inverter working indicator light, and determine the brightness of the working indicator light according to the received 220V inverter indicator light brightness mode signal; the engine management system is responsible for sending the engine status signal and the start-stop working status to the controller local area network CAN; receive the 220V inverter start-stop prohibition signal sent by the body control module, prohibit automatic shutdown, and send the start-stop prompt signal to the instrument cluster module IC;

[0028] Specifically, in step S2, when the power gear is on and the energy level is level 0, the body control module determines that the enabling condition is met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output permission instruction; when the power gear is off and the energy level is not level 0, the body control module determines that the enabling condition is not met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output permission instruction.

[0029] Specifically, in step S2, the body control module needs to control the maximum power allowed to be output by the 220V inverter according to the engine state. When the enable signal received by the 220V inverter is to allow output, the engine operation state is running, and the inverter output power is 400 watts; the engine operation state is non-operating, and the inverter output power is 200 watts; when the enable condition received by the 220V inverter is not met, the engine management system sends an engine state signal of running or non-operating, at which time the body control module sends a power limit signal to control the 220V inverter to shut down. The maximum output power of the 220V inverter controlled by the body control module is shown in Table 1:

[0030] Table 1 Maximum output power of the 220V inverter controlled by the body control module

[0031]

[0032] Specifically, in step S3, the 220V inverter determines whether to allow output according to the state of relay IG2 and the enable signal of the body control module: when the relay IG2 signal is high and valid, the enable signal received by the 220V inverter is that the output condition of the 220V inverter is on, the 220V inverter is allowed to output; when the enable signal received is that the output condition of the 220V inverter is off, the 220V inverter is not allowed to output; when the local area network LIN signal is off, when the local area network LIN signal is not detected at power-on or the signal received by the 220V inverter before the local area network LIN signal is off is that the output condition of the 220V inverter is on, the 220V inverter continues to output for 20 minutes after the local area network LIN signal is off; when the signal received by the 220V inverter before the local area network LIN signal is off is that the output condition of the 220V inverter is off, the 220V inverter stops outputting after the local area network LIN signal is off. In this process, it should be noted that when the vehicle power is turned on, the body control module control relay IG2 is disconnected, and the body control module detects that the 220V inverter is offline, no fault code is recorded, and no maintenance diagnosis is required. The body control module determines whether to send an enable signal to the 220V inverter as shown in Table 2:

[0033] Table 2 Determination table of whether the body control module sends an enable signal to the 220V inverter

[0034]

[0035] Specifically, in step S4, when the 220V inverter detects that the output power exceeds the limit power, it will cut off the output, and then restart the output after 5 seconds. The output power will be detected again. If the output power is lower than the limit power, it will output normally. If it still exceeds the limit power, the output will be cut off again. This will be repeated 5 times. If overpower is still detected for the 5th time, it is necessary to power off and then on to continue to allow output.

[0036] Specifically, in step S5, if the 220V inverter detects that the body control module is offline, the 220V inverter limits the maximum output power to 100 watts under the premise that the 220V inverter is allowed to be enabled; for vehicles with a start-stop function, the start-stop function is in the on state, and the body control module needs to control whether the 220V inverter enters the start-stop mode according to the start-stop status signal. In the start-stop mode, the maximum output power of the 220V inverter is limited to 200 watts, and during the startup process, the 220V inverter can maintain output even when it detects that the battery voltage is temporarily lower than 11V. In the non-start-stop mode, the maximum output power of the 220V inverter is the value set by the power limit signal sent by the body control module. When the 220V inverter detects that the battery voltage is lower than 11V, it will cut off the output.

[0037] Specifically, in step S5, the start-stop signal is determined in the following manner: when the vehicle has no start-stop function, the 220V inverter operates in a non-start-stop mode; when the vehicle has a start-stop function, further determination is required: when the vehicle start-stop function is turned off, the 220V inverter executes a non-start-stop mode; when the vehicle start-stop function is turned on and the engine is in an active state, the body control module sends a signal to allow output to the 220V inverter, and the 220V inverter executes a non-start-stop mode; when the engine is in an automatic stop state, the body control module sends a rapid output signal to the 220V inverter, and the 220V inverter executes a start-stop mode; the engine When the engine is in a stopped state, the body control module sends a signal to the 220V inverter that does not allow output, and the 220V inverter executes the start-stop mode; when the engine is in a restart state, the body control module sends a signal to the 220V inverter to increase the output power, and the 220V inverter executes the start-stop mode; when the engine is in a standby state, the body control module sends a signal to the 220V inverter that allows output, and the 220V inverter executes the non-start-stop mode; when the engine start-stop function is turned off, the body control module sends a signal to the 220V inverter that allows output, and the 220V inverter executes the non-start-stop mode. The operation logic of the body control module controlling the 220V inverter in the start-stop mode is shown in Table 3:

[0038] Table 3 The operation logic table of the body control module controlling the 220V inverter in the start-stop mode

[0039]

[0040] To sum up, the present invention provides a vehicle-mounted 220V inverter control method with power protection, which adds new functions on the basis of the original 220V inverter controlled by a hard-wired switch by formulating the vehicle signal interaction logic and the real-time strategy of component functions. By judging the engine start-stop working status, the allowable power range, and the protection logic of function disabling, the user's battery life and the normal use of the automatic start-stop function are effectively protected, and the problem of the vehicle battery life being damaged due to the user not disconnecting the 220V inverter power interface is avoided.

[0041] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the present invention's specification and drawings or directly or indirectly applied in related technical fields are also included in the patent protection scope of the present invention.

Claims

1. A vehicle-mounted 220V inverter control method with power protection, characterized in that: The following steps are involved: S1. The engine management system sends vehicle information, start-stop information, and engine status information to the body control module: The vehicle information, start-stop information, and engine status information sent by the engine management system are sent to the body control module via the controller area network CAN; S2. The body control module sends an enable signal to control the output command and maximum output power of the 220V inverter according to the power gear, energy level, and engine status: the body control module controls the output command of the 220V inverter according to the power gear and energy level, and the body control module controls the maximum output power of the 220V inverter according to the engine status, and sends the brightness mode of the 220V inverter indicator light and the vehicle mode signal to the local area network LIN branch line in the form of an enable signal to the 220V inverter; S3.220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module: 220V inverter determines whether output is allowed according to the state of relay IG2 and the enable signal of the body control module; S4. After the 220V inverter is allowed to output, it detects whether it exceeds the maximum power allowed by the body control module and feeds back the load signal to the body control module: the 220V inverter performs self-diagnosis, feeds back the diagnostic signal to the local area network LIN, monitors the output power, and feeds back the output power level value to the local area network LIN, and cuts off the output when it detects that the power exceeds the limit; controls the lighting of the 220V inverter working indicator light, and determines the brightness of the working indicator light according to the 220V inverter indicator light brightness mode signal received from the body control module; S5. The body control module receives the load power signal fed back by the 220V inverter, determines whether to send a start / stop prohibition signal to the engine management system, receives the 220V inverter fault signal, and performs diagnostic management: the engine management system receives the 220V inverter start / stop prohibition signal sent by the body control module, prohibits automatic shutdown, and sends a start / stop prompt signal to the instrument cluster module IC of the engine management system. When the 220V inverter detects that the battery voltage is lower than 11V, it will cut off the output.

2. A vehicle-mounted 220V inverter control method with battery protection according to claim 1, characterized in that: In step S2, when the power gear is on and the energy level is level 0, the body control module determines that the enabling condition is met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output permission instruction; when the power gear is off and the energy level is not level 0, the body control module determines that the enabling condition is not met, the body control module sends an enable signal to the 220V inverter, and the 220V inverter executes the output permission instruction.

3. The method for controlling a vehicle-mounted 220V inverter with charge protection according to claim 1, characterized in that: In step S2, the body control module needs to control the maximum power allowed to be output by the 220V inverter according to the engine state. When the enable signal received by the 220V inverter is to allow output, the engine operation state is running, and the inverter output power is 400 watts; The engine operating state is non-operating, and the inverter output power is 200 watts; when the enabling conditions received by the 220V inverter from the body controller are not met, the engine status signal sent by the engine management system to the body controller is running or non-operating. At this time, the body control module sends a power limit signal to control the 220V inverter to shut down.

4. The method for controlling a vehicle-mounted 220V inverter with charge protection according to claim 1, characterized in that: In the step S3, the 220V inverter determines whether to allow output according to the state of the relay IG2 and the enable signal of the body control module: when the relay IG2 signal is high and effective, the enable signal received by the 220V inverter is that the output condition of the 220V inverter is not equal to 0, the 220V inverter is allowed to output; when the received enable signal is that the output condition of the 220V inverter is equal to 0, the 220V inverter is not allowed to output; when the local area network LIN signal of the 220V inverter is offline, when the local area network LIN signal is not detected when the power is turned on, or before the local area network LIN signal is offline, the signal received by the 220V inverter is that the output condition of the 220V inverter is not equal to 0, the 220V inverter continues to output for 20 minutes after the local area network LIN signal is offline; When the signal received by the 220V inverter is that the output condition of the 220V inverter is equal to 0 before the local area network LIN signal is disconnected, the 220V inverter remains not allowed to output after the local area network LIN signal is disconnected.

5. The method for controlling a vehicle-mounted 220V inverter with charge protection according to claim 1, characterized in that: In step S4, when the 220V inverter detects that the output power exceeds the limit power, it will cut off the output, and then restart the output after 5 seconds. The output power will be detected again. If the output power is lower than the limit power, it will be output normally. If it still exceeds the limit power, the output will be cut off again. This will be repeated 5 times. If overpower is still detected for the 5th time, it is necessary to power off and then power on again to allow output.

6. A vehicle-mounted 220V inverter control method with battery protection according to claim 1, characterized in that: In step S5, if the 220V inverter detects that the body control module is offline, the 220V inverter limits the maximum output power to 100 watts under the premise that the 220V inverter is allowed to be enabled; for vehicles with a start-stop function, the start-stop function is in the on state, and the body control module needs to control whether the 220V inverter enters the start-stop mode according to the start-stop status signal. In the start-stop mode, the maximum output power of the 220V inverter is limited to 200 watts, and during the startup process, the 220V inverter detects that the battery voltage is temporarily lower than 11V and maintains output. In the non-start-stop mode, the maximum output power of the 220V inverter is the value set by the power limit signal sent by the body control module. The 220V inverter cuts off the output when it detects that the battery voltage is lower than 11V.

7. A vehicle-mounted 220V inverter control method with battery level protection according to claim 1, characterized in that: In step S5, the start-stop signal judgment method is: when the vehicle has no start-stop function, the 220V inverter operates in the non-start-stop mode; when the vehicle has the start-stop function, further judgment is required. When the vehicle start-stop function is turned off, the 220V inverter executes the non-start-stop mode. When the vehicle start-stop function is turned on and the engine is in an active state, the body control module sends a signal to the 220V inverter to allow output. The 220V inverter executes the non-start-stop mode; when the engine is in the automatic stop state, the body control module sends a rapid output signal to the 220V inverter, and the 220V inverter executes the start-stop mode; when the engine is in the stopped state, the body control module sends a signal to the 220V inverter that output is not allowed, and the 220V inverter executes the start-stop mode; when the engine is in the restart state, the body control module sends a signal to increase the output power to the 220V inverter, and the 220V inverter executes the start-stop mode; when the engine is in the standby state, the body control module sends a signal to allow output to the 220V inverter, and the 220V inverter executes the non-start-stop mode; when the engine is in the start-stop function off state, the body control module sends a signal to allow output to the 220V inverter, and the 220V inverter executes the non-start-stop mode.

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