Control device and method for charging failure of vehicle storage battery

Abstract

The invention relates to a device and a method for controlling the charging failure of a vehicle storage battery. The device comprises a storage battery charging identification module, a charging loop isolation control module, a communication module and a loop isolation execution module. When the vehicle is static and the storage battery sensor recognizes that the electric quantity of the storage battery is low, the storage battery charging recognition module determines whether to execute a charging instruction or not according to the charging condition; the loop isolation execution module can isolate a low-voltage loop of the whole vehicle, and after isolation, the power supply loop supplies power to an electrical load strongly related to the electricity supplementing function; waking up the whole vehicle network, and sending an unrelated load to execute a disconnection instruction through a CAN message; after the low-voltage loop of the whole vehicle is isolated, power supply to the load irrelevant to the electricity supplementing function is cut off. After the electricity supplement is finished, the electricity supplement isolation control module controls the loop isolation execution module to complete loop closing, and the state before the electricity supplement is recovered. Through isolation control of the power supply loop, low-voltage power consumption is reduced to the greatest extent, so that the power consumption of the power battery is reduced, and the endurance mileage is increased.

Description

Technical Field

[0001] The invention belongs to the field of automobile technology, and in particular relates to a control device and method for failure of battery charging in a vehicle. Background Art

[0002] At present, when pure electric vehicles or plug-in hybrid vehicles are parked or in the high-voltage power-off state, if the battery power is low, the vehicle can actively apply high voltage to recharge the battery, thereby avoiding 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).

[0003] At present, when the industry starts charging, the whole vehicle controller will wake up, and during the charging process, the low-voltage load of the whole vehicle will be in an invalid power consumption state. For example, intelligent driving controller, instrument, host, seat controller, airbag controller and other controllers and loads that are not related to charging or high-voltage power-up. This state will increase the power consumption of DCDC output, and further increase the power consumption of the power battery.

[0004] Based on this, there is an urgent need to develop a control device and method for vehicle battery charging failure to effectively solve the above problems. Summary of the invention

[0005] The purpose of the present invention is to provide a control device for vehicle battery charging failure, and also to provide a control method for vehicle battery charging failure, so as to solve the problem of isolating and controlling the loads unrelated to the charging related functions during the charging process, thereby maximizing the reduction of low-voltage power consumption through the isolation control of the power supply circuit, thereby reducing the power consumption of the power battery and increasing the cruising range.

[0006] The objective of the present invention is achieved through the following technical solutions:

[0007] A control device for failure of battery charging in a vehicle, comprising a battery charging identification module, a charging circuit isolation control module, a communication module and a circuit isolation execution module integrated inside a housing;

[0008] The battery charging identification module is connected to the battery sensor; the battery sensor is connected to the battery, and can obtain the battery power information and transmit the information to the battery charging identification module; the battery charging identification module is respectively connected to the charging circuit isolation control module and the CAN / LIN communication module, and can decide whether to execute the charging instruction according to the charging conditions;

[0009] The power supply circuit isolation control module is connected to the circuit isolation execution module. After the power supply is completed, the power supply isolation control module can control the circuit isolation execution module to complete the circuit closure;

[0010] The communication module is a CAN communication module or a LIN communication module, which communicates with multiple loads, including electrical loads that are strongly related to the power replenishment function and loads that are not related to the power replenishment function. The communication module can wake up the vehicle network before power failure, and send a disconnection instruction to the loads that are not related to the power replenishment function through a CAN message;

[0011] The circuit isolation execution module is connected to the DCDC connected to the power battery. The circuit isolation execution module can isolate 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 power replenishment function, and disconnects power supply to loads that are not related to the power replenishment function.

[0012] Furthermore, the conditions for charging include power supply status, vehicle speed, battery power status, fault status of a controller related to charging, power battery power status, and cabin door switch status.

[0013] Furthermore, the communication module is a CAN communication module or a LIN communication module.

[0014] Furthermore, the power supplement function strongly correlates with electrical loads that simultaneously consider safety factors, data upload requirements, user unlocking and other necessary loads, including BMS, HCU, door control, and T-BOX.

[0015] Furthermore, loads that are not related to the power replenishment function include seat controllers, intelligent driving controllers, radars, cameras, instruments, host computers, central control screens, HUDs, and lighting systems.

[0016] Furthermore, the loop isolation execution module includes high-power relays or MOS components, which are 1 group or 2 groups, taking into account reliability and functional safety requirements.

[0017] Furthermore, the loop isolation execution module may also be integrated outside the housing.

[0018] A method for controlling failure of battery charging of a vehicle, comprising the following steps:

[0019] A. When the vehicle is stationary and the battery sensor detects that the battery power is low, the battery recharging identification module determines whether to execute the recharging instruction based on the recharging conditions;

[0020] B. If the power replenishment command is executed, the circuit isolation execution module isolates the low-voltage circuit of the vehicle, and the power supply circuit after isolation supplies power to the electrical loads related to the power replenishment function;

[0021] C. Wake up the vehicle network and send disconnect instructions to irrelevant loads through CAN messages;

[0022] D. After the low-voltage circuit of the vehicle is isolated, the loads not related to the power replenishment function are disconnected from the power supply;

[0023] E. After the power replenishment is completed, the power replenishment isolation control module will control the loop isolation execution module to complete the loop closure and restore to the state before the power replenishment.

[0024] Furthermore, in step A, the conditions for charging include power supply status, vehicle speed, battery power status, fault status of a controller related to charging, power battery power status, and cabin door switch status.

[0025] A car is controlled by using the control method for failure of battery replenishment in a vehicle.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention provides a low-power consumption control device in a power replenishment scenario, which internally integrates a battery power replenishment identification module, a power replenishment circuit isolation control module, a CAN / LIN communication module and a circuit isolation execution module. The circuit isolation execution module can isolate the low-voltage circuit of the whole vehicle. After isolation, the power supply circuit supplies power to electrical loads that are strongly related to the power replenishment function, and disconnects the power supply to loads that are not related to the power replenishment function. Before power failure, the whole vehicle network is awakened, and a disconnection instruction is sent to irrelevant loads through CAN messages, thereby avoiding the problem of loads reporting faults or recording fault codes when power is off. 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0029] Figure 1 Schematic diagram of the battery automatic charging device, communication and power supply circuit. DETAILED DESCRIPTION

[0030] The present invention will be further described below in conjunction with embodiments:

[0031] like Figure 1 As shown, the control device for vehicle battery charging failure of the present invention includes a battery charging identification module, a charging circuit isolation control module, a communication module and a circuit isolation execution module integrated inside the housing.

[0032] The battery charging identification module is connected to the battery sensor. The battery sensor is connected to the battery, and can obtain the battery power information and transmit the information to the battery charging identification module. The battery charging identification module is connected to the charging circuit isolation control module and the communication module respectively, and can decide whether to execute the charging instruction according to the charging conditions, such as power supply status, vehicle speed, battery power status, charging-related controller fault status, power battery power status, and cabin door switch status.

[0033] The power replenishment circuit isolation control module is connected to the circuit isolation execution module. After the power replenishment is completed, the power replenishment isolation control module can control the circuit isolation execution module to complete the circuit closure.

[0034] The communication module is a CAN communication module or a LIN communication module, and communicates with multiple loads, including electrical loads that are strongly related to the power replenishment function and loads that are not related to the power replenishment function. The communication module can wake up the vehicle network before power failure, and send a disconnection instruction to the loads that are not related to the power replenishment function through a CAN message, so as to avoid the problem of loads reporting faults or recording fault codes when power is off.

[0035] The electrical loads strongly related to the power replenishment function synchronously consider safety factors, data upload requirements, user unlocking and other necessary loads, including BMS, HCU, door control, T-BOX, etc. The loads unrelated to the power replenishment function include seat controllers, intelligent driving controllers, radars, cameras, instruments, host computers, central control screens, HUDs, lighting systems, etc.

[0036] The loop isolation execution module is connected to the DCDC connected to the power battery. The loop isolation execution module includes high-power relays or MOS components, etc., which can be 1 group or 2 groups, considering reliability and functional safety requirements. The loop isolation execution module can isolate the low-voltage circuit of the whole vehicle. After isolation, the power supply circuit supplies power to electrical loads that are strongly related to the power replenishment function, and disconnects power to loads that are not related to the power replenishment function. The loop isolation execution module can also be integrated outside the housing.

[0037] When the electrical loads of the isolation circuit of the present invention are differentiated and set, all loads that are not related to the power supply function, safety, data upload, door unlocking, and user memory functions are isolated outside the power supply circuit. The present invention avoids the problem of false alarm failure caused by isolated power failure of the controller by isolating the control execution and recovery logic settings.

[0038] The control method for vehicle battery charging failure of the present invention comprises the following steps:

[0039] 1. When the vehicle is stationary and the battery sensor identifies that the battery power is low, the battery charging identification module decides whether to execute the charging instruction based on the charging conditions, such as power supply status, vehicle speed, battery power status, charging-related controller fault status, power battery power status, and cabin door switch status;

[0040] 2. If the power replenishment command is executed, the circuit isolation execution module can isolate the low-voltage circuit of the vehicle, and the power supply circuit after isolation will supply power to the electrical loads related to the power replenishment function;

[0041] 3. Wake up the vehicle network and send disconnect instructions to irrelevant loads through CAN messages;

[0042] 4. After the low-voltage circuit of the vehicle is isolated, the loads not related to the power replenishment function are disconnected from the power supply.

[0043] 5. After the power replenishment is completed, the power replenishment isolation control module will control the loop isolation execution module to complete the loop closure and restore to the state before the power replenishment.

[0044] Note that the above are only preferred embodiments of the present invention and the technical principles used. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and that various obvious changes, readjustments and substitutions can be made by those skilled in the art without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in more detail through the above embodiments, the present invention is not limited to the above embodiments, and may include more other equivalent embodiments without departing from the concept of the present invention, and the scope of the present invention is determined by the scope of the appended claims.

Claims

1. A control device for failure of battery charging in a vehicle, characterized in that: It includes a battery charging identification module, a charging circuit isolation control module, a communication module and a circuit isolation execution module integrated in the housing; The battery charging identification module is connected to the battery sensor; the battery sensor is connected to the battery, and can obtain the battery power information and transmit the information to the battery charging identification module; the battery charging identification module is respectively connected to the charging circuit isolation control module and the CAN / LIN communication module, and can decide whether to execute the charging instruction according to the charging conditions; The power supply circuit isolation control module is connected to the circuit isolation execution module. After the power supply is completed, the power supply isolation control module can control the circuit isolation execution module to complete the circuit closure; The communication module is a CAN communication module or a LIN communication module, which communicates with multiple loads, including electrical loads that are strongly related to the power replenishment function and loads that are not related to the power replenishment function. The communication module can wake up the vehicle network before power failure, and send a disconnection instruction to the loads that are not related to the power replenishment function through a CAN message; The circuit isolation execution module is connected to the DCDC connected to the power battery. The circuit isolation execution module can isolate 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 power replenishment function, and disconnects power supply to loads that are not related to the power replenishment function.

2. A control device for failure of battery charging in a vehicle according to claim 1, characterized in that: The conditions for charging include power supply status, vehicle speed, battery power status, fault status of charging-related controller, power battery power status, and cabin door switch status.

3. A control device for failure of battery charging in a vehicle according to claim 1, characterized in that: The communication module is a CAN communication module or a LIN communication module.

4. A control device for failure of battery charging in a vehicle according to claim 1, characterized in that: The power replenishment function is strongly related to electrical loads and synchronously considers safety factors, data upload requirements, user unlocking and other necessary loads, including BMS, HCU, door control, and T-BOX.

5. The control device for failure of battery charging of a vehicle according to claim 1, characterized in that: Loads not related to the power replenishment function include seat controllers, intelligent driving controllers, radars, cameras, instruments, host computers, central control screens, HUDs, and lighting systems.

6. A control device for failure of battery charging in a vehicle according to claim 1, characterized in that: The loop isolation execution module includes high-power relays or MOS components, which are 1 group or 2 groups, taking into account reliability and functional safety requirements.

7. The control device for failure of battery charging of a vehicle according to claim 1, characterized in that: The loop isolation execution module may also be integrated outside the housing.

8. A method for controlling failure of battery charging in a vehicle, characterized in that: The following steps are involved: A. When the vehicle is stationary and the battery sensor detects that the battery power is low, the battery recharging identification module determines whether to execute the recharging instruction based on the recharging conditions; B. If the power replenishment command is executed, the circuit isolation execution module isolates the low-voltage circuit of the vehicle, and the power supply circuit after isolation supplies power to the electrical loads related to the power replenishment function; C. Wake up the vehicle network and send disconnect instructions to irrelevant loads through CAN messages; D. After the low-voltage circuit of the vehicle is isolated, the loads not related to the power replenishment function are disconnected from the power supply; E. After the power replenishment is completed, the power replenishment isolation control module will control the loop isolation execution module to complete the loop closure and restore to the state before the power replenishment.

9. A method for controlling failure of battery charging of a vehicle according to claim 1, characterized in that: In step A, the conditions for charging include power supply status, vehicle speed, battery power status, fault status of charging-related controller, power battery power status, and cabin door switch status.

10. An automobile, characterized in that: The control is performed by adopting a control method for failure of battery replenishment of a vehicle as described in any one of claims 8 to 9.

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