CN114228646A - Power supplementing system and method - Google Patents

Power supplementing system and method Download PDF

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Publication number
CN114228646A
CN114228646A CN202111582715.9A CN202111582715A CN114228646A CN 114228646 A CN114228646 A CN 114228646A CN 202111582715 A CN202111582715 A CN 202111582715A CN 114228646 A CN114228646 A CN 114228646A
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Prior art keywords
message
voltage
vehicle
bcm
signal
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CN202111582715.9A
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CN114228646B (en
Inventor
张正萍
牟红兵
唐如意
董丰康
陈浩
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Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
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Chongqing Jinkang Sailisi New Energy Automobile Design Institute Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
    • B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
    • B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
    • B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
    • B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/60—Other road transportation technologies with climate change mitigation effect
    • Y02T10/70—Energy storage systems for electromobility, e.g. batteries

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Secondary Cells (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

The embodiment of the invention provides a power supply system and a method. The method comprises the following steps: the method comprises the steps that an external temperature sensor detects external temperature of the automobile, generates a first message according to the external temperature of the automobile, and sends the first message to a BCM (binary coded modulation); the BCM judges whether the temperature outside the vehicle is smaller than a temperature threshold value; if the BCM judges that the outside temperature is smaller than the temperature threshold value, generating a first handshake signal and sending the first handshake signal to an outside temperature sensor; the vehicle exterior temperature sensor responds to the first handshake signal to generate a second message, and the second message is sent to the high-voltage battery pack; and if the high-voltage battery pack receives the second message in the set time period, responding to the second message and the electricity supplementing signal, and supplementing electricity to the low-voltage storage battery or supplementing electricity to the storage battery according to the first set time length so as to supplement the electric quantity of the low-voltage storage battery to the preset SOC value. The embodiment of the invention reduces the risk of low-voltage storage battery power shortage.

Description

Power supplementing system and method
[ technical field ] A method for producing a semiconductor device
The invention relates to the field of automobile batteries, in particular to a power supply system and a power supply method.
[ background of the invention ]
The low-voltage storage battery is a low-voltage power supply of the whole vehicle, is used for supplying static current to the whole vehicle when the whole vehicle is in static state, and can supplement power for low-voltage electric appliances, zero device control chips and communication devices of the whole vehicle under extreme conditions. The low-voltage storage battery of the electric automobile has smaller battery capacity than that of the fuel oil vehicle due to factors such as arrangement space, weight and cost of the whole vehicle. Therefore, if the whole vehicle is kept still for a long time, the low-voltage storage battery cannot be supplied with electricity for a long time, and the electricity is insufficient or even exhausted. The low-voltage storage battery is insufficient in power, so that the whole vehicle cannot be started, the low-voltage storage battery is deeply vulcanized, the charging and discharging capacity is weakened, and a battery management system cannot work normally.
In order to solve the problem of insufficient power of the low-voltage storage battery, the current commonly adopted mode is as follows: the low-voltage storage battery is supplied with power at regular time; or, the voltage of the low-voltage storage battery and the State of Charge (SOC) value of the battery are collected at regular time, and whether the low-voltage storage battery needs to be recharged is judged according to the voltage of the low-voltage storage battery and the SOC value. However, since the north charging capacity in winter is weak, the electric quantity of the low-voltage battery cannot be supplemented to an ideal condition within a predetermined time, and therefore, the low-voltage battery is easily lack of electricity.
[ summary of the invention ]
In view of this, the embodiment of the invention provides a power supply system and a method, which are used for solving the problem that a low-voltage storage battery is easy to lack power in the prior art.
In one aspect, an embodiment of the present invention provides an electricity supplementing method, where the method is based on an electricity supplementing system, and the system includes: the vehicle external temperature sensor, the vehicle body controller BCM, the high-voltage battery pack and the low-voltage battery:
the temperature sensor outside the vehicle detects the temperature outside the vehicle, generates a first message according to the temperature outside the vehicle, wherein the first message comprises the temperature outside the vehicle, and sends the first message to the BCM;
the BCM judges whether the temperature outside the vehicle is smaller than a temperature threshold value;
if the BCM judges that the temperature outside the vehicle is smaller than the temperature threshold value, generating a first handshake signal and sending the first handshake signal to the temperature sensor outside the vehicle;
the vehicle exterior temperature sensor responds to the first handshake signal to generate a second message, and the second message is sent to the high-voltage battery pack;
and if the high-voltage battery pack receives the second message in the set time period, responding to the second message and the electricity supplementing signal, and supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a first set time length so as to supplement the electric quantity of the low-voltage storage battery to the SOC value of the preset battery.
Optionally, the system further includes a vehicle control unit VCU, and the method further includes:
the method comprises the steps that a high-voltage battery pack sends a first notification signal to a VCU when a low-voltage storage battery starts to be supplied with power, wherein the first notification signal comprises a first set time length;
the VCU starts to time in response to the first notification signal to obtain a first timing duration, and controls the high voltage under the whole vehicle when the first timing duration reaches the first set duration; or the VCU responds to the received sixth message and controls the high voltage under the whole vehicle.
Optionally, the system further includes a VCU and a battery sensor EBS, and the method further includes:
if the BCM judges that the temperature outside the vehicle is greater than or equal to a temperature threshold value, if the high-voltage battery pack does not receive the second message within the set time period, responding to the electricity supplementing signal, supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a second set time length so as to supplement the electric quantity of the low-voltage storage battery to the preset SOC value, and sending a second notification signal to the VCU when the high-voltage battery pack begins to supplement the electricity to the low-voltage storage battery, wherein the second notification signal comprises the second set time length;
and the VCU starts to time in response to the second notification signal to obtain a second timing duration, and controls the overall vehicle high voltage when the second timing duration reaches a second set duration, or receives the sixth message sent by the EBS to control the overall vehicle high voltage.
Optionally, after controlling the high pressure under the whole vehicle, the method further includes:
the VCU generates a sleep signal and sends the sleep signal to the BCM;
the BCM responds to the sleep signal, controls the whole vehicle to enter the sleep state, generates a fifth message and sends the fifth message to the EBS;
and the EBS responds to a fifth message and enters the sleep state.
Optionally, the system further includes a vehicle control unit VCU;
the method further comprises the following steps:
the VCU judges whether the whole vehicle can be subjected to high voltage;
if the VCU judges that the whole vehicle can be charged with high voltage, generating a compensation signal and sending the compensation signal to the high-voltage battery pack, and generating a high-voltage normal signal and sending the high-voltage normal signal to the temperature sensor outside the vehicle;
and responding to the high-voltage normal signal by the external temperature sensor, executing the step that the external temperature sensor detects the external temperature of the vehicle, generating a first message according to the external temperature of the vehicle, and sending the first message to the BCM.
Optionally, if the VCU determines that the entire vehicle cannot be subjected to high voltage, a high voltage abnormal signal is generated and sent to the BCM;
and the BCM responds to the high-voltage abnormal signal and controls the whole vehicle to enter a sleep state.
Optionally, the system further comprises an EBS;
before the VCU judges whether the whole vehicle can have high voltage, the method further comprises the following steps:
responding to a gear correct signal, awakening the EBS, detecting battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM;
the BCM judges whether the battery parameters meet the power supplementing triggering conditions or not;
if the BCM judges that the relevant parameters meet the power supply triggering condition, generating a second handshake signal and sending the second handshake signal to the EBS;
the EBS responds to the second handshake signal to generate a fourth message and sends the fourth message to the BCM;
and the BCM responds to the fourth message to awaken the BCM and awaken the whole vehicle network.
In another aspect, an embodiment of the present invention provides a power supply system, including: the system comprises an external temperature sensor, a BCM, a high-voltage battery pack and a low-voltage battery;
the vehicle exterior temperature sensor is used for detecting the vehicle exterior temperature, generating a first message according to the vehicle exterior temperature, wherein the first message comprises the vehicle exterior temperature, and sending the first message to the BCM;
the BCM is used for judging whether the temperature outside the vehicle is smaller than a temperature threshold value or not, generating a first handshake signal if the temperature outside the vehicle is judged to be smaller than the temperature threshold value, and sending the first handshake signal to the temperature sensor outside the vehicle;
the vehicle exterior temperature sensor is also used for responding to the first handshake signal, generating a second message and sending the second message to the high-voltage battery pack;
and the high-voltage battery pack is used for responding to the second message and the electricity supplementing signal if the second message is received within the set time period, and supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a first set time length so as to supplement the electric quantity of the low-voltage storage battery to a preset SOC value.
Optionally, the power supply system further includes: a VCU;
the VCU is used for judging whether the whole vehicle can be subjected to high voltage or not, generating a compensation signal and sending the compensation signal to the high-voltage battery pack if the whole vehicle can be subjected to high voltage, and generating a high-voltage normal signal and sending the high-voltage normal signal to the temperature sensor outside the vehicle;
the temperature sensor outside the vehicle is also used for responding to the high-voltage normal signal, executing the steps that the temperature sensor outside the vehicle detects the temperature outside the vehicle, generating a first message according to the temperature outside the vehicle, and sending the first message to the BCM.
Optionally, the power supply system further includes: EBS;
the EBS is used for responding to a gear correct signal, waking up the EBS, detecting battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM;
the BCM is also used for judging whether the battery parameters meet the power supplementing triggering conditions; if the relevant parameters meet the power supply triggering conditions, generating a second handshake signal, and sending the second handshake signal to the EBS;
the EBS is further used for responding to the second handshake signal, generating a fourth message and sending the fourth message to the BCM;
and the BCM is also used for responding to the fourth message to wake up the BCM and wake up the whole vehicle network.
In the technical scheme that this embodiment provided, temperature sensor outside the car detects the car external temperature, according to the first message of car external temperature generation, and will first message is sent to BCM, BCM responds to first message is judged whether the car external temperature is less than the setting value, BCM if judge the car external temperature is less than the setting value, generates first handshake signal, and will first handshake signal sends for temperature sensor outside the car, temperature sensor outside the car responds to first handshake signal generates the second message, will the second message sends for high-voltage battery package, high-voltage battery package responds to the second message, and is long right at first settlement low-voltage battery carries out the moisturizing, has reduced the risk of low-voltage battery insufficient voltage.
[ description of the drawings ]
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive labor.
Fig. 1 is a schematic diagram of a power supply system according to an embodiment of the present invention;
FIG. 2 is a flowchart of a power supplement method according to an embodiment of the present invention
[ detailed description ] embodiments
For better understanding of the technical solutions of the present invention, the following detailed descriptions of the embodiments of the present invention are provided with reference to the accompanying drawings.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, third, etc. may be used to describe numbers, etc. in embodiments of the invention, these numbers should not be limited to these terms. These terms are only used to distinguish one number from another. For example, a first number may also be referred to as a second number, and similarly, a second number may also be referred to as a first number, without departing from the scope of embodiments of the present invention.
The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
Fig. 1 is a schematic structural diagram of a replenishment system according to an embodiment of the present invention, as shown in fig. 1, the replenishment system includes: the vehicle-mounted temperature monitoring system comprises a vehicle-mounted temperature sensor 1, a vehicle Body Controller (BCM) 2, a high-voltage battery pack 3 and a low-voltage battery 4.
The temperature sensor 1 outside the vehicle is connected with the BCM 2, the temperature sensor 1 outside the vehicle is connected with the high-voltage battery pack 3, and the high-voltage battery pack 3 is connected with the low-voltage storage battery 4. The temperature sensor 1 outside the vehicle is used for detecting the temperature outside the vehicle, generating a first message according to the temperature outside the vehicle, wherein the first message comprises the temperature outside the vehicle, and sending the first message to the BCM 2. The BCM 2 is used for judging whether the temperature outside the vehicle is smaller than a temperature threshold value; and if the temperature outside the vehicle is judged to be less than the temperature threshold value, generating a first handshake signal, and sending the first handshake signal to the temperature sensor 1 outside the vehicle. The vehicle exterior temperature sensor 1 is also used for responding to the first handshake signal, generating a second message and sending the second message to the high-voltage battery pack 3. And the high-voltage battery pack 3 is used for responding to the second message and the electricity supplementing signal if the second message is received within the set time period, and supplementing electricity to the low-voltage storage battery 4 or supplementing electricity to the low-voltage storage battery 4 according to a first set time length so as to supplement the electric quantity of the low-voltage storage battery 4 to a preset SOC value.
The system further comprises: a Vehicle Control Unit (VCU) 5.
The VCU 5 is connected with the BCM 2, and the VCU 5 is connected with the high-voltage battery pack 3. The VCU 5 is used for judging whether the whole vehicle can be subjected to high voltage, and if the whole vehicle can be subjected to high voltage, generating a compensation signal and sending the compensation signal to the high-voltage battery pack 3, and generating a high-voltage normal signal and sending the high-voltage normal signal to the temperature sensor 1 outside the vehicle. The vehicle exterior temperature sensor 1 is also used for responding to the high-voltage normal signal, executing the steps that the vehicle exterior temperature sensor 1 detects the vehicle exterior temperature, generating a first message according to the vehicle exterior temperature, and sending the first message to the BCM 2.
The system further comprises: a Battery Sensor (Electronic Battery Sensor, abbreviated as EBS) 6.
EBS 6 is connected to BCM 2 via a LIN line, EBS 6 being connected to VCU 5. The EBS 6 is used for responding to a gear correct signal, waking up the gear correct signal, detecting battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM 2. The BCM 2 is also used for judging whether the battery parameters meet the power supplementing triggering conditions; and if the relevant parameters meet the power supply triggering conditions, generating a second handshake signal, and sending the second handshake signal to the EBS 6. And the EBS 6 is further configured to generate a fourth packet in response to the second handshake signal, and send the fourth packet to the BCM 2. And the BCM 2 is also used for responding to the fourth message to wake up the BCM and wake up the whole vehicle network.
The system further comprises: an air conditioner controller 7 and a gateway 8.
The external temperature sensor 1 is connected with an air conditioner controller 7 through a hard wire, the air conditioner controller 7 is connected with a gateway 8 through a BD CAN wire, and the gateway 8 is connected with the high-voltage battery pack 3 through a power bus. The vehicle exterior temperature sensor 1 is specifically configured to generate a second message in response to the first handshake signal, and send the second message to the air conditioner controller 7. The air conditioner controller 7 is configured to send the second message to the gateway 8. The gateway 8 is configured to send the second message to the high-voltage battery pack 3.
In the embodiment of the present invention, the VCU 5 is further configured to generate a sleep signal, and send the sleep signal to the BCM 2. And the BCM 2 is also used for responding to the sleep signal, controlling the whole vehicle to enter the sleep state, generating a fifth message and sending the fifth message to the EBS 6. The EBS 6 is further configured to enter the sleep state in response to a fifth packet.
In the embodiment of the invention, the VCU 5 is further configured to determine whether the entire vehicle can be subjected to high voltage, and if the VCU 5 determines that the entire vehicle can be subjected to high voltage, a compensation signal is generated and sent to the high-voltage battery pack 3, and a high-voltage normal signal is generated and sent to the temperature sensor 1 outside the vehicle. And responding to the high-voltage normal signal by the external temperature sensor 1, executing the steps of detecting the external temperature by the external temperature sensor 1, generating a first message according to the external temperature, and sending the first message to the BCM 2.
In the embodiment of the invention, the VCU 5 is further configured to generate a high-voltage abnormal signal if it is determined that the entire vehicle cannot be subjected to high voltage application, and send the high-voltage abnormal signal to the BCM 2. And the BCM 2 is also used for responding to the high-voltage abnormal signal and controlling the whole vehicle to enter a sleep state.
In the embodiment of the present invention, the EBS 6 is further configured to wake up itself in response to a gear correct signal, detect a battery parameter, generate a third packet according to the battery parameter, where the third packet includes the battery parameter, and send the third packet to the BCM 2. The BCM 2 is further used for judging whether the battery parameters meet the power supply triggering conditions, and if the BCM 2 judges that the relevant parameters meet the power supply triggering conditions, second handshake signals are generated and sent to the EBS 6. And the EBS 6 is further configured to generate a fourth packet in response to the second handshake signal, and send the fourth packet to the BCM 2. And the BCM 2 is also used for responding to the fourth message to wake up the BCM and wake up the whole vehicle network.
In the technical scheme that this embodiment provided, temperature sensor outside the car detects the car temperature, according to the first message of car temperature generation, and will first message is sent to BCM, BCM responds to first message is judged whether the car temperature is less than the setting value, if BCM judges the car temperature is less than the setting value, generate first handshake signal, and will first handshake signal sends for temperature sensor outside the car, temperature sensor outside the car responds to first handshake signal generates the second message, will the second message sends for high-voltage battery package, high-voltage battery package responds to the second message, and it is right to carry out the moisturizing at first setting time low voltage battery, has solved the low-voltage battery that charging capacity leads to when the car temperature is low and has lacked the electric problem.
The embodiment of the invention provides an electricity supplementing method which can be realized based on an electricity supplementing system. Fig. 2 is a flowchart of a power supplement method according to an embodiment of the present invention, and as shown in fig. 2, the method includes:
step 101, the BCM judges whether the whole vehicle is in a flameout (off) gear, if so, step 102 is executed; if not, the process ends.
In the embodiment of the invention, if the BCM judges that the whole vehicle is in an off gear, the BCM indicates that the whole vehicle can enter a current compensation process, and step 102 is executed; and if the BCM judges that the whole vehicle is not in an off gear, the BCM indicates that the whole vehicle cannot enter a power supply process, and the process is ended.
And 102, generating a gear correct signal by the BCM, and sending the gear correct signal to the EBS.
In the embodiment of the invention, if the BCM detects that the whole vehicle is in the off gear, a gear correct signal is generated and used for indicating that the whole vehicle is in the off gear.
And 103, responding to the gear correct signal to awaken the EBS, detecting the battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM.
In the embodiment of the invention, the EBS can awaken itself, and after receiving the gear correct signal, the EBS periodically awakens itself and detects the battery parameters, wherein the battery parameters comprise voltage and SOC value.
In the embodiment of the present invention, the EBS sends the third packet to the BCM through a Local Interconnect Network (LIN).
In the embodiment of the invention, the EBS starts to continuously detect the battery parameters after waking up the EBS, generates the sixth message when detecting that the SOC value in the battery parameters is greater than or equal to the preset SOC value, and sends the sixth message to the VCU.
104, judging whether the battery parameters meet the power supply triggering conditions or not by the BCM, and if so, executing a step 106; if not, go to step 105.
In the embodiment of the invention, if the BCM judges that the battery parameters meet the power supplementing triggering condition, indicating that the low-voltage storage battery needs to be supplemented with power, executing step 106; and if the BCM judges that the battery parameters do not meet the power supplementing triggering conditions, indicating that the low-voltage storage battery does not need to be supplemented with power, and executing the step 105.
In the embodiment of the invention, the power supply triggering condition comprises that the voltage is smaller than a first set value and/or the SOC value is smaller than a second set value. Step 104 may specifically include: the BCM judges whether the voltage is smaller than a first set value or whether the SOC value is smaller than a second set value. If the BCM judges that the voltage is smaller than the first set value and/or the SOC value is smaller than the second set value, indicating that the low-voltage storage battery needs to be supplied with power; and if the BCM judges that the voltage is greater than or equal to the first set value and the SOC value is greater than or equal to the second set value, indicating that the low-voltage storage battery does not need to be supplemented with electricity.
And 105, controlling the whole vehicle to enter a sleep state by the BCM, and ending the process.
And 106, generating a second handshake signal by the BCM, and sending the second handshake signal to the EBS.
In the embodiment of the invention, when the BCM judges that the battery parameters meet the power supply triggering condition, a second handshake signal is generated according to a handshake protocol.
And step 107, the EBS responds to the second handshake signal to generate a fourth message and sends the fourth message to the BCM.
In the embodiment of the invention, the EBS receives the second handshake signal, the battery parameters are acquired through the second handshake signal to meet the power compensation triggering condition, and the EBS generates the fourth message if the low-voltage storage battery needs to be compensated.
In the embodiment of the invention, the EBS sends the fourth message to the BCM through the LIN.
And step 108, the BCM responds to the fourth message to awaken the BCM and awaken the whole vehicle network.
In the embodiment of the invention, the BCM can receive the message but cannot send the message before waking up, and the BCM can receive the message or send the message after waking up. The whole vehicle network can receive messages but cannot send messages before being awakened, and can receive messages or send messages after being awakened.
Step 109, the VCU judges whether the whole vehicle can be subjected to high voltage, if so, the step 110 is executed; if not, go to step 121.
In the embodiment of the invention, the whole vehicle network comprises the VCU, and the VCU is awakened after the BCM awakens the whole vehicle network. After the VCU is awakened, whether the whole vehicle can be powered on with high voltage is automatically judged. If the VCU judges that the high voltage of the whole vehicle energy indicates that the whole vehicle can be normally supplemented with electricity, the step 110 is executed; and if the VCU judges that the whole vehicle cannot be subjected to high voltage, which indicates that the whole vehicle cannot be normally subjected to power supplement, executing the step 121.
And 110, generating a compensation signal by the VCU, and sending the compensation signal to the high-voltage battery pack.
In the embodiment of the invention, when the VCU judges that the whole vehicle can carry out high voltage, a compensation signal is generated and used for indicating that the high-voltage battery pack can be prepared for power compensation.
And step 111, the VCU generates a high-voltage normal signal and sends the high-voltage normal signal to a temperature sensor outside the automobile.
In the embodiment of the invention, when the VCU detects that the whole vehicle can normally run at high voltage, the VCU generates a high-voltage normal signal, and the high-voltage normal signal is used for indicating that the whole vehicle can normally run at high voltage.
And 112, responding to the high-voltage normal signal by the vehicle exterior temperature sensor, detecting the vehicle exterior temperature, generating a first message according to the vehicle exterior temperature, wherein the first message comprises the vehicle exterior temperature, and sending the first message to the BCM.
In the embodiment of the invention, the temperature sensor outside the vehicle sends the first message to the BCM through the air conditioner controller. Specifically, the temperature sensor outside the vehicle sends the first message to the air conditioner controller, and the air conditioner controller sends the first message to the BCM.
Step 113, the BCM judges whether the temperature outside the vehicle is smaller than a temperature threshold value, if so, step 114 is executed; if not, go to step 123.
In the embodiment of the invention, if the BCM judges that the outside temperature is less than the temperature threshold, the BCM indicates that the electricity supplementing method is used for supplementing electricity when the outside temperature is less than the temperature threshold, and then step 114 is executed; if the BCM judges that the temperature outside the vehicle is greater than or equal to the temperature threshold, the BCM indicates that the electricity is supplemented by adopting the electricity supplementing method when the temperature outside the vehicle is greater than or equal to the temperature threshold, and step 123 is executed.
And step 114, generating a first handshake signal by the BCM, and sending the first handshake signal to the temperature sensor outside the vehicle.
In the embodiment of the invention, if the BCM judges that the outside temperature is less than the temperature threshold, a first handshake signal is generated according to a handshake protocol.
And step 115, the vehicle exterior temperature sensor responds to the first handshake signal to generate a second message, and the second message is sent to the high-voltage battery pack.
In the embodiment of the invention, the temperature sensor outside the vehicle receives the first handshake signal, the temperature outside the vehicle is acquired to be smaller than the temperature threshold value through the first handshake signal, and the low-voltage storage battery needs to be supplied with power, so that the temperature sensor outside the vehicle generates the second message.
In the embodiment of the invention, the external temperature sensor sends the second message to the high-voltage battery pack through the air conditioner controller and the gateway.
In the embodiment of the present invention, step 115 may specifically include:
and step 1151, the external temperature sensor responds to the first handshake signal to generate a second message, and the second message is sent to the air conditioner controller.
And step 1152, the air conditioner controller sends the second message to the gateway.
In the embodiment of the present invention, the air conditioner Controller sends the second message to the gateway through a Body Controller Area Network (BD CAN).
And step 1153, the gateway sends the second message to the high-voltage battery pack.
In the embodiment of the invention, the gateway sends the second message to the high-voltage battery pack through the power bus.
And step 116, if the high-voltage battery pack receives the second message within the set time period, responding to the second message and the electricity supplementing signal, supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a first set time length to supplement the electric quantity of the low-voltage storage battery to a preset SOC value, and sending a first notification signal to the VCU when the high-voltage battery pack starts to supplement the electricity to the low-voltage storage battery, wherein the first notification signal comprises the first set time length, and the starting time point of the set time period is the time point when the high-voltage battery pack receives the electricity supplementing signal.
In the embodiment of the invention, the first set time is 1.5 hours, and the preset SOC value is 95%.
In the embodiment of the invention, in winter, when the temperature outside the vehicle is relatively low, the activity of the electrolyte of the low-voltage storage battery is low, the charge and discharge capacity of the low-voltage storage battery is also greatly reduced, the electric quantity requirement of the low-voltage storage battery is difficult to meet after electricity is supplemented for 1 hour, the standing time of the whole vehicle can be shortened, and the whole vehicle can be frequently awakened to supplement electricity for the low-voltage battery pack. The risk that the whole vehicle does not enter a sleep state can be increased when the whole vehicle is frequently awakened, and finally the high-voltage battery pack can be quickly powered off if the whole vehicle does not enter the sleep state. Therefore, the low-voltage storage battery is electrified for 1.5 hours, so that the whole vehicle can be effectively prevented from being frequently awakened, and the risk that the high-voltage battery pack is not electrified due to the fact that the whole vehicle is not in a sleep state after being frequently awakened is reduced.
In the embodiment of the invention, the power supply to the preset SOC value can avoid the frequent awakening of the whole vehicle, and the risk of the power failure of the high-voltage battery pack caused by the fact that the whole vehicle does not enter a sleep state due to the frequent awakening is reduced.
Step 117, the VCU starts to time in response to the first notification signal to obtain a first timing duration, and controls the high voltage under the whole vehicle when the first timing duration reaches a first set duration; or the VCU responds to the received sixth message and controls the high voltage under the whole vehicle.
In the embodiment of the invention, if the first timing duration reaches the first set duration, the high-voltage battery pack is indicated to finish power supply to the low-voltage battery according to the first set duration, and the VCU can control the high voltage under the whole vehicle; if the VCU receives the sixth message sent by the EBS, it indicates that the high-voltage battery pack has supplemented the electric quantity of the low-voltage battery to the preset SOC value, and the VCU may control the high voltage of the entire vehicle.
Step 118, the VCU generates a sleep signal and sends the sleep signal to the BCM.
In the embodiment of the invention, if the VCU controls the whole vehicle to have high voltage, a sleep signal is generated, and the sleep signal is used for indicating that the whole vehicle has finished having high voltage.
And step 119, the BCM responds to the sleep signal, controls the whole vehicle to enter a sleep state, generates a fifth message and sends the fifth message to the EBS.
In the embodiment of the invention, the BCM sends the fifth message to the EBS through the LIN.
And step 120, the EBS responds to the fifth message and enters a sleep state.
And step 121, the VCU generates a high-voltage abnormal signal and sends the high-voltage abnormal signal to the BCM.
In the embodiment of the invention, when the VCU detects that the whole vehicle can not be subjected to high voltage application, a high-voltage abnormal signal is generated, and the high-voltage abnormal signal is used for indicating that the whole vehicle can not be subjected to high voltage application normally.
And step 122, responding to the high-voltage abnormal signal by the BCM, controlling the whole vehicle to enter a sleep state, and ending the process.
In the embodiment of the invention, if the BCM receives the high-voltage abnormal signal, the whole vehicle does not enter the power supply process any more.
And step 123, if the high-voltage battery pack does not receive the second message within the set time period, responding to the electricity supplementing signal, supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a second set time period so as to supplement the electric quantity of the low-voltage storage battery to a preset SOC value, and sending a second notification signal to the VCU when the high-voltage battery pack starts to supplement the electricity to the low-voltage storage battery, wherein the second notification signal comprises the second set time period.
In the embodiment of the invention, the second set time period is 1 hour, and the preset SOC value is 95%.
And step 124, the VCU starts timing in response to the second notification signal to obtain a second timing duration, controls the high voltage of the entire vehicle when the second timing duration reaches a second set duration, or receives a sixth message sent by the EBS to control the high voltage of the entire vehicle, and executes step 118.
In the embodiment of the invention, if the second timing duration reaches the second set duration, the high-voltage battery pack is indicated to finish power supply to the low-voltage battery according to the second set duration, and the VCU can control the high voltage under the whole vehicle; if the VCU receives the sixth message sent by the EBS, it indicates that the high-voltage battery pack has supplemented the electric quantity of the low-voltage battery to the preset SOC value, and the VCU may control the high voltage of the entire vehicle.
In the embodiment of the invention, in spring, summer and autumn, when the temperature outside the automobile is relatively high, the electrolyte activity of the low-voltage storage battery is relatively high, the SOC value can reach 95% only in relatively short time, even if the low-voltage storage battery is slightly vulcanized, the electric quantity requirement of the low-voltage storage battery can be met after electricity is supplemented for 1 hour, and the whole automobile can be kept still for half a month after electricity is supplemented for the low-voltage storage battery once.
In the technical scheme that this embodiment provided, temperature sensor outside the car detects the car temperature, according to the first message of car temperature generation, and will first message is sent to BCM, BCM responds to first message is judged whether the car temperature is less than the setting value, if BCM judges the car temperature is less than the setting value, generate first handshake signal, and will first handshake signal sends for temperature sensor outside the car, temperature sensor outside the car responds to first handshake signal generates the second message, will the second message sends for high-voltage battery package, high-voltage battery package responds to the second message, and it is right to carry out the moisturizing at first setting time low voltage battery, has solved the low-voltage battery that charging capacity leads to when the car temperature is low and has lacked the electric problem.
In the embodiment of the invention, the problem of low-voltage storage battery power shortage is solved, and the risk that the whole vehicle cannot be started can be reduced; the vulcanization of the low-voltage storage battery can be slowed down, the charge and discharge capacity of the low-voltage storage battery is maintained, and the frequency of replacing the low-voltage storage battery is reduced; the battery management system for supplying power to the low-voltage storage battery can work normally, and the complex condition that the high-voltage relay cannot be attracted to cause that the low-voltage storage battery can only be supplied with power through an external power supply is avoided.
In the embodiment of the invention, the risk of power shortage of the low-voltage storage battery can be reduced only by updating software without increasing the hardware cost of the whole vehicle, and the market competitiveness is improved.
In the embodiment of the invention, the power supply method can save power consumption of about 150W, so that the whole vehicle is more energy-saving, the risk of power shortage of the low-voltage storage battery is reduced, the requirements of customers are met, and the market competitiveness is improved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (10)

1. A method of supplementing electricity, the method being based on a system of supplementing electricity, the system comprising: the vehicle external temperature sensor, the vehicle body controller BCM, the high-voltage battery pack and the low-voltage battery:
the temperature sensor outside the vehicle detects the temperature outside the vehicle, generates a first message according to the temperature outside the vehicle, wherein the first message comprises the temperature outside the vehicle, and sends the first message to the BCM;
the BCM judges whether the temperature outside the vehicle is smaller than a temperature threshold value;
if the BCM judges that the temperature outside the vehicle is smaller than the temperature threshold value, generating a first handshake signal and sending the first handshake signal to the temperature sensor outside the vehicle;
the vehicle exterior temperature sensor responds to the first handshake signal to generate a second message, and the second message is sent to the high-voltage battery pack;
and if the high-voltage battery pack receives the second message in the set time period, responding to the second message and the electricity supplementing signal, and supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a first set time length so as to supplement the electric quantity of the low-voltage storage battery to the SOC value of the preset battery.
2. The method of claim 1, wherein the system further comprises a Vehicle Control Unit (VCU), the method further comprising:
the method comprises the steps that a high-voltage battery pack sends a first notification signal to a VCU when a low-voltage storage battery starts to be supplied with power, wherein the first notification signal comprises a first set time length;
the VCU starts to time in response to the first notification signal to obtain a first timing duration, and controls the high voltage under the whole vehicle when the first timing duration reaches the first set duration; or the VCU responds to the received sixth message and controls the high voltage under the whole vehicle.
3. The method of claim 1, wherein the system further comprises a VCU and a battery sensor EBS, the method further comprising:
if the BCM judges that the temperature outside the vehicle is greater than or equal to a temperature threshold value, if the high-voltage battery pack does not receive the second message within the set time period, responding to the electricity supplementing signal, supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a second set time length so as to supplement the electric quantity of the low-voltage storage battery to the preset SOC value, and sending a second notification signal to the VCU when the high-voltage battery pack begins to supplement the electricity to the low-voltage storage battery, wherein the second notification signal comprises the second set time length;
and the VCU starts to time in response to the second notification signal to obtain a second timing duration, and controls the overall vehicle high voltage when the second timing duration reaches a second set duration, or receives the sixth message sent by the EBS to control the overall vehicle high voltage.
4. The method of claim 2 or 3, further comprising, after said controlling high vehicle underbody pressure:
the VCU generates a sleep signal and sends the sleep signal to the BCM;
the BCM responds to the sleep signal, controls the whole vehicle to enter the sleep state, generates a fifth message and sends the fifth message to the EBS;
and the EBS responds to a fifth message and enters the sleep state.
5. The method of claim 1, wherein the system further comprises a Vehicle Control Unit (VCU);
the method further comprises the following steps:
the VCU judges whether the whole vehicle can be subjected to high voltage;
if the VCU judges that the whole vehicle can be charged with high voltage, generating a compensation signal and sending the compensation signal to the high-voltage battery pack, and generating a high-voltage normal signal and sending the high-voltage normal signal to the temperature sensor outside the vehicle;
and responding to the high-voltage normal signal by the external temperature sensor, executing the step that the external temperature sensor detects the external temperature of the vehicle, generating a first message according to the external temperature of the vehicle, and sending the first message to the BCM.
6. The method of claim 5, further comprising:
if the VCU judges that the whole vehicle cannot be subjected to high voltage, generating a high-voltage abnormal signal and sending the high-voltage abnormal signal to the BCM;
and the BCM responds to the high-voltage abnormal signal and controls the whole vehicle to enter a sleep state.
7. The method of claim 5, wherein the system further comprises an EBS;
before the VCU judges whether the whole vehicle can have high voltage, the method further comprises the following steps:
responding to a gear correct signal, awakening the EBS, detecting battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM;
the BCM judges whether the battery parameters meet the power supplementing triggering conditions or not;
if the BCM judges that the relevant parameters meet the power supply triggering condition, generating a second handshake signal and sending the second handshake signal to the EBS;
the EBS responds to the second handshake signal to generate a fourth message and sends the fourth message to the BCM;
and the BCM responds to the fourth message to awaken the BCM and awaken the whole vehicle network.
8. An electrical power replenishment system, comprising: the system comprises an external temperature sensor, a BCM, a high-voltage battery pack and a low-voltage battery;
the vehicle exterior temperature sensor is used for detecting the vehicle exterior temperature, generating a first message according to the vehicle exterior temperature, wherein the first message comprises the vehicle exterior temperature, and sending the first message to the BCM;
the BCM is used for judging whether the temperature outside the vehicle is smaller than a temperature threshold value or not, generating a first handshake signal if the temperature outside the vehicle is judged to be smaller than the temperature threshold value, and sending the first handshake signal to the temperature sensor outside the vehicle;
the vehicle exterior temperature sensor is also used for responding to the first handshake signal, generating a second message and sending the second message to the high-voltage battery pack;
and the high-voltage battery pack is used for responding to the second message and the electricity supplementing signal if the second message is received within the set time period, and supplementing electricity to the low-voltage storage battery or supplementing electricity to the low-voltage storage battery according to a first set time length so as to supplement the electric quantity of the low-voltage storage battery to a preset SOC value.
9. The system of claim 8, further comprising: a VCU;
the VCU is used for judging whether the whole vehicle can be subjected to high voltage or not, generating a compensation signal and sending the compensation signal to the high-voltage battery pack if the whole vehicle can be subjected to high voltage, and generating a high-voltage normal signal and sending the high-voltage normal signal to the temperature sensor outside the vehicle;
the temperature sensor outside the vehicle is also used for responding to the high-voltage normal signal, executing the steps that the temperature sensor outside the vehicle detects the temperature outside the vehicle, generating a first message according to the temperature outside the vehicle, and sending the first message to the BCM.
10. The system of claim 9, further comprising: EBS;
the EBS is used for responding to a gear correct signal, waking up the EBS, detecting battery parameters, generating a third message according to the battery parameters, wherein the third message comprises the battery parameters, and sending the third message to the BCM;
the BCM is also used for judging whether the battery parameters meet the power supplementing triggering conditions; if the relevant parameters meet the power supply triggering conditions, generating a second handshake signal, and sending the second handshake signal to the EBS;
the EBS is further used for responding to the second handshake signal, generating a fourth message and sending the fourth message to the BCM;
and the BCM is also used for responding to the fourth message to wake up the BCM and wake up the whole vehicle network.
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