Vehicle low-power-consumption storage battery automatic charging device and automatic charging method

Abstract

The invention discloses a low-power-consumption automatic storage battery charging device and method for a vehicle, and relates to the technical field of electric automobiles, the automatic storage battery charging device comprises a storage battery charging identification module, a charging loop isolation control module, a CAN / LIN communication module and a loop isolation execution module, the loop isolation execution module can isolate or close a low-voltage loop of the whole vehicle, after isolation, a power supply loop supplies power to an electrical load which is strongly related to the electricity supplementing function and cuts off power supply to an electrical load which is not related to the electricity supplementing function, and through isolation control of the power supply loop, low-voltage power consumption is reduced to the maximum extent, electricity consumption of a power battery is reduced in total, and the endurance mileage is increased; the electrical load of the isolation loop is distinguished, the load irrelevant to the electricity supplementing function, safety, data uploading, door opening and unlocking and the user memory function is all isolated outside the electricity supplementing loop, control execution and logic recovery are isolated, and the problem of false alarm faults caused by isolation outage of the controller is avoided.

Description

Technical Field

[0001] The present invention relates to the technical field of electric vehicles, and in particular to an automatic charging device and method for charging a battery with low power consumption in a vehicle. Background Art

[0002] In electric vehicles, the battery is not only the energy source for starting the vehicle, but also responsible for providing power for various electronic devices of the vehicle. The state of the battery is directly related to whether the electric vehicle can start and run normally. Both pure electric vehicles and plug-in hybrid models have the function of actively applying high voltage to the battery to replenish power when the battery is detected to be low during parking or high-voltage power-off state, so as to avoid the phenomenon that the vehicle cannot start normally due to long-term power consumption of the battery (static current consumption or abnormal power consumption of the vehicle). Once the battery is fed, the direct impact is that the vehicle cannot start. In addition, long-term power feeding will also damage the battery and shorten its service life. There are the following problems when the vehicle actively applies high voltage to replenish power to the battery. When starting to replenish power, the whole vehicle controller will wake up, and during the replenishment process, the low-voltage load of the whole vehicle will be in an invalid power consumption state, such as the intelligent driving controller, instrument, host, seat controller, airbag controller and other controllers and loads that are not related to replenishment or high-voltage power-on. This state will increase the power consumption of the DCDC output, and further increase the power consumption of the power battery.

[0003] The document (CN 118849876 A) discloses an automatic charging control method, device and medium for an electric vehicle battery, the method comprising: when the electric vehicle is turned off, the vehicle controller goes into sleep mode and records the sleep time; when the sleep time reaches the sleep time threshold, the battery voltage is detected based on the vehicle controller, and the battery management system, high-voltage distribution controller and DCDC converter are turned on when the battery voltage is less than the voltage threshold; the battery management system and the high-voltage distribution controller monitor the electric vehicle to determine whether there is fault data; when there is no fault data, the vehicle controller controls the high-voltage relay to close; the vehicle controller controls the DCDC converter to charge the battery; the DCDC converter determines whether the battery charging is completed; if so, the vehicle controller turns off other devices. However, entering the sleep state does not fundamentally cut off the power supply, and the battery management system will still consume power, resulting in power loss. Summary of the invention

[0004] In view of the problems existing in the prior art, the present invention conceives a low-power consumption battery automatic charging device and automatic charging method for a vehicle. During the charging process, loads unrelated to the charging-related functions are isolated and controlled through the power supply circuit to minimize low-voltage power consumption, thereby reducing the power consumption of the power battery and increasing the cruising range.

[0005] One of the technical solutions adopted to implement the present invention is: a low-power-consumption battery automatic charging device for a vehicle, characterized in that it includes: a battery charging identification module, a charging circuit isolation control module, a CAN / LIN communication module and a circuit isolation execution module, the battery charging identification module is electrically connected to a battery sensor, the battery sensor is electrically connected to a battery, the battery charging identification module is communicatively connected to a CAN / LIN communication module, the CAN / LIN communication module is communicatively connected to an electrical load that is not related to the charging function, the battery charging identification module is communicatively connected to a charging circuit isolation control module, the charging circuit isolation control module is communicatively connected to a circuit isolation execution module, and the circuit isolation execution module is respectively electrically connected to an electrical load that is strongly related to the charging function and an electrical load that is not related to the charging function.

[0006] Furthermore, the electrical loads not related to the power replenishment function include: seat controller, intelligent driving controller, radar, camera, instrument, host, central control screen, HUD, and lighting system.

[0007] Furthermore, the electrical loads strongly related to the power replenishment function include: BMS, DCDC, HCU, gate control, T-BOX, and battery sensor.

[0008] Furthermore, the loop isolation execution module is a high-power relay or a MOS component.

[0009] Furthermore, the battery sensor includes: a shunt, a pin, a control circuit board, and a shell.

[0010] The second technical solution adopted to realize the present invention is: a method for automatically replenishing the battery of a vehicle with low power consumption, characterized in that it comprises the following steps:

[0011] 6.1) When the electric vehicle is stationary, the battery sensor detects the battery power, and the battery charging identification module comprehensively considers the power supply status, battery power status, charging-related controller fault status, power battery power status, and cabin door switch status to decide whether to execute the charging instruction;

[0012] 6.2) After the battery charging identification module executes the charging instruction, the battery charging identification module communicates the instruction to the charging circuit isolation control module, the battery charging identification module wakes up the vehicle network, and after the CAN / LIN communication module sends the message to the electrical loads not related to the charging function, the charging circuit isolation control module controls the circuit isolation execution module to isolate the low-voltage circuit of the vehicle, and after the isolation, the power supply circuit disconnects the power supply to the electrical loads with strong charging function and the electrical loads not related to the charging function;

[0013] 6.3) After the electric vehicle is recharged, the battery recharge identification module withdraws the recharge instruction, and the recharge circuit isolation control module controls the circuit isolation execution module to close the low-voltage circuit of the whole vehicle. After closing, the power supply circuit supplies power to the electrical loads with strong recharge function and the electrical loads with no recharge function.

[0014] Furthermore, the loop isolation execution module is a high-power relay or MOS component, which can be integrated inside or outside the battery automatic charging device.

[0015] The beneficial effects of the low-power-consumption battery automatic charging device and automatic charging method of the present invention are as follows:

[0016] 1. A low-power-consumption battery automatic charging device for a vehicle, which integrates a battery charging identification module, a charging circuit isolation control module, a CAN / LIN communication module, and a circuit isolation execution module. The circuit isolation execution module can isolate or close the low-voltage circuit of the entire vehicle. After isolation, the power supply circuit supplies power to electrical loads that are strongly related to the charging function, and disconnects power to electrical loads that are not related to the charging function. Through the isolation control of the power supply circuit, the low-voltage power consumption is minimized to the maximum extent, thereby reducing the power consumption of the power battery and increasing the cruising range; 2. A low-power-consumption battery automatic charging method for a vehicle, which distinguishes the electrical loads of the isolation circuit, and isolates all loads that are not related to the charging function, safety, data uploading, door unlocking, and user memory functions outside the charging circuit. The isolation control execution and recovery logic are used to avoid false alarm faults caused by isolation power failures in the controller. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The invention discloses a low-power-consumption battery automatic charging device for a vehicle, and a schematic diagram of a communication and power supply circuit. DETAILED DESCRIPTION

[0018] The following is combined with Figure 1 The specific implementation manner will further describe the present invention in detail. To make the purpose, technical scheme and advantages of the implementation manner clearer, the technical scheme in the implementation manner will be clearly and completely described in combination with the embodiments of the present invention. The specific implementation manner described here is only used to explain the present invention and is not used to limit the scope of the present invention.

[0019] As attached Figure 1As shown, a low-power-consumption battery automatic charging device for a vehicle comprises: a battery charging identification module, a charging circuit isolation control module, a CAN / LIN communication module and a circuit isolation execution module, wherein the battery charging identification module is electrically connected to a battery sensor, and the battery sensor is electrically connected to a battery, and the battery sensor comprises: a shunt, a pin, a control circuit board, and a housing, wherein the battery charging identification module is communicatively connected to a CAN / LIN communication module, and the CAN / LIN communication module is communicatively connected to an electrical load not related to a charging function, and the electrical load not related to a charging function The load includes: a seat controller, an intelligent driving controller, a radar, a camera, an instrument, a host, a central control screen, a HUD, and a lighting system. The battery charging identification module is communicatively connected to the charging circuit isolation control module, and the charging circuit isolation control module is communicatively connected to the circuit isolation execution module. The circuit isolation execution module is respectively electrically connected to electrical loads that are strongly related to the charging function and electrical loads that are not related to the charging function. The electrical loads that are strongly related to the charging function include: BMS, DCDC, HCU, gate control, T-BOX, and battery sensor. The circuit isolation execution module is a high-power relay or MOS component.

[0020] A method for automatically replenishing power of a low-power-consumption battery in a vehicle comprises the following steps:

[0021] 1) When the electric vehicle is stationary, the battery sensor detects the battery power, and the battery charging identification module comprehensively considers the power supply status, battery power status, charging-related controller fault status, power battery power status, and cabin door switch status to decide whether to execute the charging instruction;

[0022] 2) After the battery charging identification module executes the charging instruction, the battery charging identification module communicates the instruction to the charging circuit isolation control module, the battery charging identification module wakes up the vehicle network, and after the CAN / LIN communication module sends a message to the electrical loads unrelated to the charging function, the charging circuit isolation control module controls the circuit isolation execution module to isolate the low-voltage circuit of the vehicle, and after the isolation, the power supply circuit disconnects the power supply to the electrical loads strongly related to the charging function and the electrical loads unrelated to the charging function;

[0023] 3) After the electric vehicle is recharged, the battery recharge identification module withdraws the recharge instruction, and the recharge circuit isolation control module controls the circuit isolation execution module to close the low-voltage circuit of the whole vehicle. After closing, the power supply circuit supplies power to the electrical loads with strong recharge function and the electrical loads with no recharge function.

[0024] The above is only a preferred embodiment of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A low-power-consumption battery automatic charging device for a vehicle, characterized in that it include: A battery charging identification module, a charging circuit isolation control module, a CAN / LIN communication module and a circuit isolation execution module, wherein the battery charging identification module is electrically connected to a battery sensor, the battery sensor is electrically connected to a battery, the battery charging identification module is communicatively connected to a CAN / LIN communication module, the CAN / LIN communication module is communicatively connected to an electrical load that is not related to the charging function, the battery charging identification module is communicatively connected to a charging circuit isolation control module, the charging circuit isolation control module is communicatively connected to a circuit isolation execution module, and the circuit isolation execution module is respectively electrically connected to an electrical load that is strongly related to the charging function and an electrical load that is not related to the charging function.

2. The low-power-consumption battery automatic charging device for a vehicle according to claim 1 is characterized in that: The electrical loads not related to the power replenishment function include: seat controller, intelligent driving controller, radar, camera, instrument, host, central control screen, HUD, and lighting system.

3. The low-power-consumption battery automatic charging device for a vehicle according to claim 1 is characterized in that: The electrical loads strongly related to the power replenishment function include: BMS, DCDC, HCU, door control, T-BOX, and battery sensor.

4. The low-power-consumption battery automatic charging device for a vehicle according to claim 1 is characterized in that: The loop isolation execution module is a high-power relay or a MOS component.

5. The low-power-consumption battery automatic charging device for vehicles according to claim 1 is characterized in that: The battery sensor comprises: a shunt, a pin, a control circuit board and a shell.

6. A method for automatically replenishing the battery of a vehicle with low power consumption, characterized in that: It includes the following steps: 6.1) When the electric vehicle is stationary, the battery sensor detects the battery power, and the battery charging identification module comprehensively considers the power supply status, battery power status, charging-related controller fault status, power battery power status, and cabin door switch status to decide whether to execute the charging instruction; 6.2) After the battery charging identification module executes the charging instruction, the battery charging identification module communicates the instruction to the charging circuit isolation control module, the battery charging identification module wakes up the vehicle network, and after the CAN / LIN communication module sends the message to the electrical loads not related to the charging function, the charging circuit isolation control module controls the circuit isolation execution module to isolate the low-voltage circuit of the vehicle, and after the isolation, the power supply circuit disconnects the power supply to the electrical loads with strong charging function and the electrical loads not related to the charging function; 6.3) After the electric vehicle is recharged, the battery recharge identification module withdraws the recharge instruction, and the recharge circuit isolation control module controls the circuit isolation execution module to close the low-voltage circuit of the whole vehicle. After closing, the power supply circuit supplies power to the electrical loads with strong recharge function and the electrical loads with no recharge function.

7. A method for automatically replenishing the battery of a vehicle with low power consumption according to claim 6, characterized in that: The loop isolation execution module is a high-power relay or MOS component, which can be integrated inside or outside the battery automatic charging device.

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