CN112339612A - Storage battery charging control method and device and automobile - Google Patents
Storage battery charging control method and device and automobile Download PDFInfo
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- CN112339612A CN112339612A CN201910726162.6A CN201910726162A CN112339612A CN 112339612 A CN112339612 A CN 112339612A CN 201910726162 A CN201910726162 A CN 201910726162A CN 112339612 A CN112339612 A CN 112339612A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L58/00—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles
- B60L58/10—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries
- B60L58/12—Methods or circuit arrangements for monitoring or controlling batteries or fuel cells, specially adapted for electric vehicles for monitoring or controlling batteries responding to state of charge [SoC]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
- B60L3/0046—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train relating to electric energy storage systems, e.g. batteries or capacitors
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- 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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a storage battery charging control method and device and an automobile, and relates to the technical field of storage battery charging. The storage battery charging control method comprises the following steps: acquiring the current residual electric quantity and the performance state value of the storage battery; judging whether the storage battery is damaged or not according to the current residual electric quantity and the performance state value; when the storage battery is damaged, sending a storage battery replacement reminding signal to the instrument controller; and when the storage battery is not damaged, controlling a direct current/direct current converter to charge the storage battery. According to the embodiment of the invention, whether the storage battery is damaged or not is intelligently identified by acquiring the residual electric quantity and the performance state value of the storage battery, and the intelligent charging enabling of the storage battery is forbidden if the storage battery is damaged according to the judgment result, so that the problem that the intelligent charging of the storage battery cannot be stopped or is frequently started and stopped is avoided.
Description
Technical Field
The invention relates to the technical field of storage battery charging, in particular to a storage battery charging control method and device and an automobile.
Background
With the development of science and technology, automobiles become indispensable transportation means in daily life of people; because fuel oil is used as an unrenewable resource, more and more automobile manufacturers gradually focus on research and production of pure electric vehicles in order to reduce the usage amount of the fuel oil.
The existing intelligent sensor product for the storage battery has the storage battery health state which is used for a period of time, needs a period of time for correction, and cannot feed back the real health state in real time. When the storage battery is accidentally overdischarged, the health state of the storage battery cannot be corrected in real time. After the storage battery sensor is powered off, the storage battery sensor considers that the storage battery is replaced, the storage battery state is recalculated, the real health state of the storage battery cannot be fed back within a period of time, when the storage battery is damaged, the storage battery state provided by the storage battery intelligent sensor cannot be judged, and the problem that the intelligent charging of the storage battery cannot be stopped or is started and stopped frequently can occur.
Disclosure of Invention
The embodiment of the invention provides a storage battery charging control method and device and an automobile, and aims to solve the problem of how to avoid the problem that the storage battery cannot be stopped or started and stopped frequently during charging.
In order to solve the above technical problem, an embodiment of the present invention provides a method for controlling charging of a storage battery, where the method includes:
acquiring the current residual electric quantity and the performance state value of the storage battery;
judging whether the storage battery is damaged or not according to the current residual electric quantity and the performance state value;
when the storage battery is damaged, sending a storage battery replacement reminding signal to the instrument controller;
and when the storage battery is not damaged, controlling a direct current/direct current converter to charge the storage battery.
Further, the acquiring the current remaining capacity and the performance state value of the storage battery includes:
detecting whether the monitoring time of a preset monitoring interval period is reached;
when the monitoring time of a preset monitoring interval period is reached, sending a first wake-up signal to a storage battery sensor, and controlling the storage battery sensor to acquire the current residual electric quantity and the performance state value of the storage battery;
controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to a vehicle body controller, and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
Further, the determining whether the storage battery is damaged according to the current remaining power and the performance status value includes:
when the performance state value is lower than or equal to a charge prohibition threshold, determining that the storage battery is damaged;
when the performance state value is higher than the charge prohibition threshold, determining a charge start threshold, a damage threshold and a charge end threshold corresponding to the performance state value according to a preset charge control curve;
when the current residual electric quantity is lower than the charging starting threshold value, controlling a direct current/direct current converter to charge a storage battery, calculating charging time and acquiring real-time residual electric quantity;
when the charging time is longer than the preset time, judging whether the real-time residual electric quantity is higher than the damage threshold value;
when the real-time residual electric quantity is lower than or equal to the damage threshold value, determining that the storage battery is damaged, and controlling the direct current/direct current converter to stop charging the storage battery;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
Further, before the determining whether the storage battery is damaged, the method further includes:
sending a detection signal to the vehicle body controller to control the vehicle body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
detecting whether there is a high voltage electrical fault when the front hatch is detected to be closed;
when the high-voltage low-voltage fault does not exist, detecting the residual capacity of the power battery;
and when the residual electric quantity is higher than a preset threshold value, judging whether the storage battery is damaged.
Further, when the storage battery is not damaged, controlling a dc/dc converter to charge the storage battery comprises:
when the current residual electric quantity is lower than the charging starting threshold value, controlling the direct current/direct current converter to charge the storage battery, and monitoring the real-time residual electric quantity;
and when the real-time residual capacity is equal to the charging end threshold value, controlling the direct current/direct current converter to stop charging the storage battery.
Further, after sending the storage battery replacement reminding signal to the instrument controller, the method further includes:
acquiring the current residual electric quantity and the performance state value of the storage battery;
determining a fault clearing threshold corresponding to the performance state value according to a preset charging control curve;
and when the current residual capacity is higher than the fault clearing threshold value and the performance state value is higher than the charge prohibition threshold value, sending a fault clearing confirmation signal for the damaged storage battery to the instrument controller.
The embodiment of the invention also provides a storage battery charging control device, which comprises:
the first acquisition module is used for acquiring the current residual electric quantity and the performance state value of the storage battery;
the judging module is used for judging whether the storage battery is damaged or not according to the current residual electric quantity and the performance state value;
the first sending module is used for sending a storage battery replacement reminding signal to the instrument controller when the storage battery is damaged;
and the control module is used for controlling the direct current/direct current converter to charge the storage battery when the storage battery is not damaged.
Further, the first obtaining module includes:
the detection unit is used for detecting whether the monitoring time of a preset monitoring interval period reaches or not;
the sending unit is used for sending a first wake-up signal to a storage battery sensor when the monitoring time of a preset monitoring interval period is reached, and controlling the storage battery sensor to collect the current residual electric quantity and the performance state value of the storage battery;
the first control unit is used for controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to the vehicle body controller and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and the acquisition unit is used for acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
Further, the determining module includes:
a first determination unit configured to determine that the storage battery is damaged when the performance state value is lower than or equal to a charge prohibition threshold;
a second determining unit, configured to determine, according to a preset charging control curve, a charging start threshold, a damage threshold, and a charging end threshold corresponding to the performance state value when the performance state value is higher than the charging prohibition threshold;
the second control unit is used for controlling the direct current/direct current converter to charge the storage battery when the current residual electric quantity is lower than the charging starting threshold, calculating the charging time and acquiring the real-time residual electric quantity;
the judging unit is used for judging whether the real-time residual electric quantity is higher than the damage threshold value or not when the charging time is longer than preset time;
a third determination unit configured to determine that the storage battery is damaged and control the dc/dc converter to stop charging the storage battery when the real-time remaining power is lower than or equal to the damage threshold;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
Further, the apparatus further comprises:
the second sending module is used for sending a detection signal to the automobile body controller and controlling the automobile body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
the first detection module is used for detecting whether high-voltage electric faults exist or not when the front hatch is detected to be closed;
the second detection module is used for detecting the residual electric quantity of the power battery when the high-voltage low-voltage fault does not exist;
the judging module is further used for judging whether the storage battery is damaged or not when the residual electric quantity is higher than a preset threshold value.
Further, the control module includes:
the third control unit is used for controlling the direct current/direct current converter to charge the storage battery and monitoring the real-time residual electric quantity when the current residual electric quantity is lower than the charging starting threshold value;
a fourth control unit, configured to control the dc/dc converter to stop charging the storage battery when the real-time remaining power is equal to the charge end threshold.
Further, after sending the battery replacement reminding signal to the instrument controller, the device further comprises:
the second acquisition module is used for acquiring the current residual electric quantity and the performance state value of the storage battery;
the determining module is used for determining a fault clearing threshold value corresponding to the performance state value according to a preset charging control curve;
and the third sending module is used for sending a fault clearing confirmation signal for the damage of the storage battery to the instrument controller when the current residual power is higher than the fault clearing threshold and the performance state value is higher than the charge prohibition threshold.
The embodiment of the invention also provides an automobile which comprises the storage battery charging control device.
The invention has the beneficial effects that:
according to the scheme, whether the storage battery is damaged or not is intelligently identified by acquiring the residual electric quantity and the performance state value of the storage battery, and intelligent charging enabling of the storage battery is forbidden according to the damaged state. When the storage battery has damage faults, whether the storage battery is replaced by a user can be intelligently identified by detecting whether the performance state value and the residual electric quantity of the storage battery are higher than a certain threshold value, and if the storage battery is replaced, related faults are intelligently cleared. If the battery is an old battery, after the battery enters the intelligent charging mode again, the damage fault of the battery can be rapidly identified, and the problem that the intelligent charging of the storage battery cannot be stopped or is frequently started and stopped is avoided.
Drawings
Fig. 1 is a schematic structural view showing a battery charge control system according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a method for controlling battery charging according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a battery charge control curve according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a battery charge control device according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The invention provides a storage battery charging control method, a storage battery charging control device and an automobile, aiming at solving the problem of how to avoid the problem that the storage battery cannot be stopped or started and stopped frequently.
The storage battery charging control method provided by the embodiment of the invention is applied to a storage battery charging control system, and as shown in fig. 1, the system comprises: the system comprises a storage battery, a storage battery sensor, a vehicle control unit, a vehicle body controller, a battery management system, a power battery and a direct current/direct current converter.
The storage battery sensor is connected with the storage battery through a wire harness, the storage battery sensor is connected with the vehicle body controller through an LIN line, the vehicle controller is communicated with the vehicle body controller, the direct current/direct current converter and the battery management system through a CAN bus, and the direct current/direct current converter is connected with the power battery and the storage battery through the wire harness.
Specifically, the storage battery sensor can accurately measure key monitoring parameters such as voltage, current and pole temperature of the storage battery, calculate key monitoring parameters such as residual capacity SOC and state of performance (SOH) based on the parameters, and monitor the state of the storage battery at any time according to the parameters. And transmits these parameters to the body controller via the LIN line. The vehicle body controller detects the state of a front cabin cover of the vehicle and feeds back the state information of the front cabin cover to the vehicle controller through a CAN bus; the vehicle body controller CAN be awakened by the storage battery sensor through an LIN line, receives the storage battery key monitoring parameters of the storage battery sensor through the LIN line, and sends the storage battery key monitoring parameters to the whole vehicle controller through the CAN bus. The vehicle controller detects conditions such as a vehicle body door lock state, a power battery state and the like, outputs an intelligent charging enabling flag bit after comprehensive judgment, guides the vehicle to supply and discharge electricity at high voltage, and controls the direct current/direct current converter to work. And the direct current/direct current converter works according to the command of the vehicle controller, converts high voltage of the power battery into low voltage and charges the low-voltage storage battery. And the power battery management system detects the state information of the power battery and sends the state information to the vehicle control unit through the CAN bus.
As shown in fig. 2 in conjunction with fig. 1, the method for controlling charging of a storage battery includes:
and 24, controlling a direct current/direct current converter to charge the storage battery when the storage battery is not damaged.
According to the embodiment of the invention, whether the storage battery is damaged or not is intelligently identified by acquiring the residual electric quantity and the performance state value of the storage battery, and the intelligent charging enabling of the storage battery is forbidden according to the damaged state. When the storage battery has damage faults, whether the storage battery is replaced by a user can be intelligently identified by detecting whether the performance state value and the residual electric quantity of the storage battery are higher than a certain threshold value, and if the storage battery is replaced, related faults are intelligently cleared. If the battery is an old battery, after the battery enters the intelligent charging mode again, the damage fault of the battery can be rapidly identified, and the problem that the intelligent charging of the storage battery cannot be stopped or is frequently started and stopped is avoided.
It should be noted that, when the entire vehicle is in the power-off standing state, each controller is in the sleep state. In order to avoid the situation that the intelligent charging of the storage battery cannot be stopped or the storage battery is started and stopped frequently, the storage battery sensor needs to be ensured to enter an awakening mode at intervals, the voltage, the current and the temperature of the storage battery are measured, and meanwhile, the parameters of the battery monitoring system, including the current remaining power SOC, the performance state value SOH, the starting capability SOF of the battery and the like, are updated. Therefore, the step 21 includes:
detecting whether the monitoring time of a preset monitoring interval period is reached;
when the monitoring time of a preset monitoring interval period is reached, sending a first wake-up signal to a storage battery sensor, and controlling the storage battery sensor to acquire the current residual electric quantity and the performance state value of the storage battery;
controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to a vehicle body controller, and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
Specifically, the interval period may be set according to a use environment of the vehicle or an empirical value, and the embodiment of the present invention is not particularly limited thereto.
In the existing intelligent sensor product for the storage battery, the SOH is a SOH used in a period of time, and the correction needs a period of time, so that the real health state of the storage battery cannot be fed back in real time. When the storage battery is accidentally overdischarged, the state of performance value SOH of the storage battery cannot be corrected in real time. After the storage battery sensor is powered off, the storage battery sensor considers that the storage battery is replaced, the storage battery state is recalculated, the real storage battery performance state value SOH cannot be fed back within a period of time, when the storage battery is damaged, the storage battery performance state value SOH cannot be judged according to the storage battery performance state value SOH provided by the storage battery intelligent sensor, the problem that intelligent charging of the storage battery cannot be stopped or is started and stopped frequently can occur, the intelligent charging function of the storage battery is forbidden at the moment, unnecessary energy loss can be avoided, and the storage battery is prevented from being further damaged.
Specifically, in order to determine whether the storage battery is damaged, a charging prohibition threshold, that is, a lower limit threshold SOHmin for controlling intelligent charging prohibition is set, and determining whether the storage battery is damaged includes two cases: in the first case, when the state of performance value SOH of the storage battery is lower than or equal to the charge prohibition threshold value SOHmin, the storage battery is considered to be damaged, and the intelligent charging function of the storage battery is prohibited from being enabled; in the second case, when the state of performance value SOH of the storage battery is higher than the charge prohibition threshold SOHmin and meets the charge condition, the storage battery is charged and the change of the electric quantity within a certain time is detected, and if the state of performance value SOH is still lower than the preset threshold, the storage battery is considered to be damaged, and the charging of the storage battery is stopped at this moment. Therefore, the step 22 includes:
when the performance state value is lower than or equal to a charge prohibition threshold, determining that the storage battery is damaged;
when the performance state value is higher than the charge prohibition threshold, determining a charge start threshold, a damage threshold and a charge end threshold corresponding to the performance state value according to a preset charge control curve;
when the current residual electric quantity is lower than the charging starting threshold value, controlling a direct current/direct current converter to charge a storage battery, calculating charging time and acquiring real-time residual electric quantity;
when the charging time is longer than the preset time, judging whether the real-time residual electric quantity is higher than the damage threshold value;
when the real-time residual electric quantity is lower than or equal to the damage threshold value, determining that the storage battery is damaged, and controlling the direct current/direct current converter to stop charging the storage battery;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
It should be noted that the charging control curves in the above steps are shown in fig. 3, where a first curve C1 is a charging start threshold determination curve, a second curve C2 is a damage threshold determination curve, a third curve C3 is a fault clearing threshold determination curve, a fourth curve C4 is a charging end threshold determination curve, and SOHmin is a charging prohibition threshold.
It should be noted that, when the storage battery is damaged, the charging current of the storage battery is small, the storage battery is difficult to charge, and the change of the SOC of the storage battery is small, so that the intelligent charging time of the storage battery is counted after the storage battery is charged intelligently. When the intelligent charging time of the storage battery exceeds a certain time, if the SOC of the storage battery is still lower than a storage battery damage threshold value, the storage battery is considered to be damaged.
It is further noted that, after determining that the storage battery is damaged, the method further includes: and storing the damage fault of the storage battery in the EEPROM, and forbidding the intelligent charging function of the storage battery to enable at the moment.
When the vehicle is powered on again, the storage battery damage fault stored in the EEPROM is read, if the storage battery damage fault is effective, the intelligent charging enabling of the storage battery is forbidden, and the instrument reminds a driver of storage battery damage.
Specifically, in order to ensure the safety of a driver, the state of a front hatch cover sent by a vehicle body controller is detected in real time, when the front hatch cover is opened, the whole vehicle is considered to be possibly maintained, and the intelligent charging enabling of a storage battery is not allowed; in order to protect the safety of a whole vehicle system and parts, the fault of the whole vehicle high-voltage system is detected, and when the whole vehicle controller detects a DCDC fault or other high-voltage low-voltage faults, the intelligent charging enabling of the storage battery is not allowed; because the intelligent charging function is automatic high-voltage operation under the condition of no operator, when the operation of a person on the vehicle is detected, the intelligent charging function is forbidden, and a driver is prevented from getting an electric shock under the condition that the vehicle is not conscious of being electrified. In order to protect the safety of a driver, when the vehicle control unit detects a high-voltage interlocking fault, the intelligent charging function is forbidden; in order to prevent the power battery from generating the risk of power shortage or meet the requirement of long-term storage of the power battery, the residual capacity of the power battery needs to be detected, and when the vehicle control unit detects that the residual capacity of the power battery is lower than a certain threshold value, the intelligent charging function entering condition is judged to be not met. Therefore, before the step 22, the method further comprises:
sending a detection signal to the vehicle body controller to control the vehicle body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
detecting whether there is a high voltage electrical fault when the front hatch is detected to be closed;
when the high-voltage low-voltage fault does not exist, detecting the residual capacity of the power battery;
and when the residual electric quantity is higher than a preset threshold value, judging whether the storage battery is damaged.
It should be noted that, the service life of the storage battery is directly affected by the depth of each discharge of the storage battery, that is, the service life of the storage battery is different when the storage battery is in different residual currents SOC for a long time; the battery life is much longer when the battery is in a high SOC state for a long period of time than when the battery is in a low SOC state. When the storage battery performance state is better, namely the storage battery SOH is higher, the intelligent charging starting threshold value of the storage battery is set to be higher, so that the storage battery is basically in a high-power state, and the phenomenon that the storage battery is in a low-power state for a long time to cause the storage battery to be solidified and have life attenuation is avoided. When the battery performance state is poor, namely the battery SOH is lower, the intelligent charging starting threshold value of the battery is lower.
It should be further noted that, since the higher the state of charge of the battery, the less current the battery can charge, the longer the SOC interval of the same length, the longer the battery charging time. After the intelligent charging of the storage battery is carried out, the high-voltage components of the whole vehicle are all in an awakening state, certain energy loss can be caused, and in the last stage of the intelligent charging, the high-voltage power consumption caused by the intelligent charging is far larger than the current charged by the storage battery. Therefore, in order to avoid unnecessary energy loss, the intelligent charging stop SOC threshold is set, and the intelligent charging stop SOC threshold is lower than the current SOH by a certain threshold interval. The same as the intelligent charging starting threshold of the storage battery, for the intelligent charging ending storage battery SOC threshold of the storage battery, the higher the SOH of the storage battery is, the higher the ending storage battery SOC threshold is; meanwhile, in order to avoid confusion of the intelligent charging starting threshold and the end words, the intelligent charging starting threshold curve and the storage battery intelligent charging stopping threshold curve cannot be crossed, namely, the first curve C1 and the fourth curve C4 in fig. 3 cannot be crossed. Therefore, step 24 includes:
when the current residual electric quantity is lower than the charging starting threshold value, controlling the direct current/direct current converter to charge the storage battery, and monitoring the real-time residual electric quantity;
and when the real-time residual capacity is equal to the charging end threshold value, controlling the direct current/direct current converter to stop charging the storage battery.
Specifically, after the driver notices the prompt of the damage of the storage battery on the instrument, the storage battery is replaced, and at the moment, the state of performance value SOH and the current remaining capacity SOC of the storage battery are given to a higher default value. At the moment, when the vehicle control unit detects that the residual electric quantity SOC of the storage battery is higher than the storage battery fault clearing threshold and the state of performance value SOH of the storage battery is higher than the storage battery charging prohibition threshold, the storage battery is considered to be normal, the clearing of the storage battery damage fault is completed, and the speed can be fast. Therefore, after step 23, the method further comprises:
acquiring the current residual electric quantity and the performance state value of the storage battery;
determining a fault clearing threshold corresponding to the performance state value according to a preset charging control curve;
and when the current residual capacity is higher than the fault clearing threshold value and the performance state value is higher than the charge prohibition threshold value, sending a fault clearing confirmation signal for the damaged storage battery to the instrument controller.
It should be noted that the fault clearing threshold is determined according to the third curve C3 in fig. 3.
As shown in fig. 4, an embodiment of the present invention further provides a storage battery charging control apparatus, including:
a first obtaining module 41, configured to obtain a current remaining power and a performance status value of the storage battery;
a judging module 42, configured to judge whether the storage battery is damaged according to the current remaining power and the performance status value;
the first sending module 43 is used for sending a storage battery replacement reminding signal to the instrument controller when the storage battery is damaged;
and the control module 44 is used for controlling the direct current/direct current converter to charge the storage battery when the storage battery is not damaged.
Specifically, the first obtaining module 41 includes:
the detection unit is used for detecting whether the monitoring time of a preset monitoring interval period reaches or not;
the sending unit is used for sending a first wake-up signal to a storage battery sensor when the monitoring time of a preset monitoring interval period is reached, and controlling the storage battery sensor to collect the current residual electric quantity and the performance state value of the storage battery;
the first control unit is used for controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to the vehicle body controller and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and the acquisition unit is used for acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
Specifically, the determining module 42 includes:
a first determination unit configured to determine that the storage battery is damaged when the performance state value is lower than or equal to a charge prohibition threshold;
a second determining unit, configured to determine, according to a preset charging control curve, a charging start threshold, a damage threshold, and a charging end threshold corresponding to the performance state value when the performance state value is higher than the charging prohibition threshold;
the second control unit is used for controlling the direct current/direct current converter to charge the storage battery when the current residual electric quantity is lower than the charging starting threshold, calculating the charging time and acquiring the real-time residual electric quantity;
the judging unit is used for judging whether the real-time residual electric quantity is higher than the damage threshold value or not when the charging time is longer than preset time;
a third determination unit configured to determine that the storage battery is damaged and control the dc/dc converter to stop charging the storage battery when the real-time remaining power is lower than or equal to the damage threshold;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
Specifically, the apparatus further comprises:
the second sending module is used for sending a detection signal to the automobile body controller and controlling the automobile body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
the first detection module is used for detecting whether high-voltage electric faults exist or not when the front hatch is detected to be closed;
the second detection module is used for detecting the residual electric quantity of the power battery when the high-voltage low-voltage fault does not exist;
the judging module is further used for judging whether the storage battery is damaged or not when the residual electric quantity is higher than a preset threshold value.
Specifically, the control module 44 includes:
the third control unit is used for controlling the direct current/direct current converter to charge the storage battery and monitoring the real-time residual electric quantity when the current residual electric quantity is lower than the charging starting threshold value;
a fourth control unit, configured to control the dc/dc converter to stop charging the storage battery when the real-time remaining power is equal to the charge end threshold.
Specifically, after sending the battery replacement reminding signal to the instrument controller, the device further includes:
the second acquisition module is used for acquiring the current residual electric quantity and the performance state value of the storage battery;
the determining module is used for determining a fault clearing threshold value corresponding to the performance state value according to a preset charging control curve;
and the third sending module is used for sending a fault clearing confirmation signal for the damage of the storage battery to the instrument controller when the current residual power is higher than the fault clearing threshold and the performance state value is higher than the charge prohibition threshold.
It should be noted that the embodiment of the present invention is a storage battery charge control device corresponding to the embodiment of the storage battery charge control method, and all implementation means in the embodiment of the storage battery charge control method are applied to the embodiment of the storage battery charge control device, and the same technical effects can be achieved.
The embodiment of the invention also provides an automobile which comprises the storage battery charging control device.
It should be noted that, the automobile provided with the storage battery charging control device can intelligently identify whether the storage battery is damaged or not by acquiring the residual capacity and the performance state value of the storage battery, and forbid the intelligent charging of the storage battery according to the damaged state. When the storage battery has damage faults, whether the storage battery is replaced by a user can be intelligently identified by detecting whether the performance state value and the residual electric quantity of the storage battery are higher than a certain threshold value, and if the storage battery is replaced, related faults are intelligently cleared. If the battery is an old battery, after the battery enters the intelligent charging mode again, the damage fault of the battery can be rapidly identified, and the problem that the intelligent charging of the storage battery cannot be stopped or is frequently started and stopped is avoided.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (13)
1. A battery charge control method, characterized in that the method comprises:
acquiring the current residual electric quantity and the performance state value of the storage battery;
judging whether the storage battery is damaged or not according to the current residual electric quantity and the performance state value;
when the storage battery is damaged, sending a storage battery replacement reminding signal to the instrument controller;
and when the storage battery is not damaged, controlling a direct current/direct current converter to charge the storage battery.
2. The battery charge control method according to claim 1, wherein said obtaining the current remaining capacity and the performance state value of the battery comprises:
detecting whether the monitoring time of a preset monitoring interval period is reached;
when the monitoring time of a preset monitoring interval period is reached, sending a first wake-up signal to a storage battery sensor, and controlling the storage battery sensor to acquire the current residual electric quantity and the performance state value of the storage battery;
controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to a vehicle body controller, and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
3. The battery charging control method according to claim 1, wherein the determining whether the battery is damaged or not according to the current remaining capacity and the performance status value includes:
when the performance state value is lower than or equal to a charge prohibition threshold, determining that the storage battery is damaged;
when the performance state value is higher than the charge prohibition threshold, determining a charge start threshold, a damage threshold and a charge end threshold corresponding to the performance state value according to a preset charge control curve;
when the current residual electric quantity is lower than the charging starting threshold value, controlling a direct current/direct current converter to charge a storage battery, calculating charging time and acquiring real-time residual electric quantity;
when the charging time is longer than the preset time, judging whether the real-time residual electric quantity is higher than the damage threshold value;
when the real-time residual electric quantity is lower than or equal to the damage threshold value, determining that the storage battery is damaged, and controlling the direct current/direct current converter to stop charging the storage battery;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
4. The battery charge control method according to claim 2, wherein before the determining whether the battery is damaged, the method further comprises:
sending a detection signal to the vehicle body controller to control the vehicle body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
detecting whether there is a high voltage electrical fault when the front hatch is detected to be closed;
when the high-voltage low-voltage fault does not exist, detecting the residual capacity of the power battery;
and when the residual electric quantity is higher than a preset threshold value, judging whether the storage battery is damaged.
5. The battery charge control method according to claim 2, wherein said controlling a dc/dc converter to charge the battery when the battery is not damaged includes:
when the current residual electric quantity is lower than the charging starting threshold value, controlling the direct current/direct current converter to charge the storage battery, and monitoring the real-time residual electric quantity;
and when the real-time residual capacity is equal to the charging end threshold value, controlling the direct current/direct current converter to stop charging the storage battery.
6. The battery charge control method according to claim 2, wherein after sending the battery replacement alert signal to the meter controller, the method further comprises:
acquiring the current residual electric quantity and the performance state value of the storage battery;
determining a fault clearing threshold corresponding to the performance state value according to a preset charging control curve;
and when the current residual capacity is higher than the fault clearing threshold value and the performance state value is higher than the charge prohibition threshold value, sending a fault clearing confirmation signal for the damaged storage battery to the instrument controller.
7. A battery charge control apparatus, characterized in that the apparatus comprises:
the first acquisition module is used for acquiring the current residual electric quantity and the performance state value of the storage battery;
the judging module is used for judging whether the storage battery is damaged or not according to the current residual electric quantity and the performance state value;
the first sending module is used for sending a storage battery replacement reminding signal to the instrument controller when the storage battery is damaged;
and the control module is used for controlling the direct current/direct current converter to charge the storage battery when the storage battery is not damaged.
8. The battery charge control apparatus according to claim 7, wherein the first acquisition module includes:
the detection unit is used for detecting whether the monitoring time of a preset monitoring interval period reaches or not;
the sending unit is used for sending a first wake-up signal to a storage battery sensor when the monitoring time of a preset monitoring interval period is reached, and controlling the storage battery sensor to collect the current residual electric quantity and the performance state value of the storage battery;
the first control unit is used for controlling the storage battery sensor to send the collected current residual electric quantity and the collected performance state value to the vehicle body controller and controlling the storage battery sensor to send a second wake-up signal to the vehicle body controller;
and the acquisition unit is used for acquiring the current residual electric quantity and the performance state value which are sent by the vehicle body controller according to the second wake-up signal.
9. The battery charge control apparatus according to claim 7, wherein the determination module includes:
a first determination unit configured to determine that the storage battery is damaged when the performance state value is lower than or equal to a charge prohibition threshold;
a second determining unit, configured to determine, according to a preset charging control curve, a charging start threshold, a damage threshold, and a charging end threshold corresponding to the performance state value when the performance state value is higher than the charging prohibition threshold;
the second control unit is used for controlling the direct current/direct current converter to charge the storage battery when the current residual electric quantity is lower than the charging starting threshold, calculating the charging time and acquiring the real-time residual electric quantity;
the judging unit is used for judging whether the real-time residual electric quantity is higher than the damage threshold value or not when the charging time is longer than preset time;
a third determination unit configured to determine that the storage battery is damaged and control the dc/dc converter to stop charging the storage battery when the real-time remaining power is lower than or equal to the damage threshold;
determining that the battery is not damaged when the real-time remaining power is above the damage threshold.
10. The battery charge control apparatus according to claim 8, characterized in that the apparatus further comprises:
the second sending module is used for sending a detection signal to the automobile body controller and controlling the automobile body controller to detect the state of the front hatch cover;
when the front hatch cover state is detected to be opened, the direct current/direct current converter is forbidden to charge the storage battery;
the first detection module is used for detecting whether high-voltage electric faults exist or not when the front hatch is detected to be closed;
the second detection module is used for detecting the residual electric quantity of the power battery when the high-voltage low-voltage fault does not exist;
the judging module is further used for judging whether the storage battery is damaged or not when the residual electric quantity is higher than a preset threshold value.
11. The battery charge control apparatus of claim 8, wherein the control module comprises:
the third control unit is used for controlling the direct current/direct current converter to charge the storage battery and monitoring the real-time residual electric quantity when the current residual electric quantity is lower than the charging starting threshold value;
a fourth control unit, configured to control the dc/dc converter to stop charging the storage battery when the real-time remaining power is equal to the charge end threshold.
12. The battery charge control device of claim 8, wherein after sending the battery replacement alert signal to the meter controller, the device further comprises:
the second acquisition module is used for acquiring the current residual electric quantity and the performance state value of the storage battery;
the determining module is used for determining a fault clearing threshold value corresponding to the performance state value according to a preset charging control curve;
and the third sending module is used for sending a fault clearing confirmation signal for the damage of the storage battery to the instrument controller when the current residual power is higher than the fault clearing threshold and the performance state value is higher than the charge prohibition threshold.
13. An automobile characterized by comprising the battery charge control apparatus according to any one of claims 7 to 12.
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| CN201910726162.6A CN112339612A (en) | 2019-08-07 | 2019-08-07 | Storage battery charging control method and device and automobile |
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Application publication date: 20210209 |