Storage battery power-on control method, storage medium and electronic device
阅读说明：本技术 蓄电池补电控制方法、存储介质及电子设备 (Storage battery power-on control method, storage medium and electronic device ) 是由 黄蓉 卜健 许超 王智颖 冯艳 于 2021-07-30 设计创作，主要内容包括：本发明提供一种蓄电池补电控制方法、存储介质及电子设备,该方法包括：若检测到蓄电池的第一电压小于预设电压阈值,则发送补电请求；获取当前环境温度,并根据设定的所述蓄电池的目标SOC值和预设的温度-电压关系表获取与所述当前环境温度对应的目标电压；根据所述第一电压与所述目标电压的第一压差值和预设的压差-补电截止时间关系表确定补电截止时间；根据所述补电截止时间控制高压动力电池对所述蓄电池进行补电。实施本发明,可防止车辆长时间停放导致蓄电池馈电而无法启动的同时,防止因补电导致蓄电池长时间过充或整车电耗过大,并可提高蓄电池寿命,降低成本。(The invention provides a storage battery power-on control method, a storage medium and an electronic device, wherein the method comprises the following steps: if the first voltage of the storage battery is smaller than the preset voltage threshold value, sending a power supplementing request; acquiring current environment temperature, and acquiring target voltage corresponding to the current environment temperature according to a set target SOC value of the storage battery and a preset temperature-voltage relation table; determining the power supply cut-off time according to a first voltage difference value of the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table; and controlling a high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time. The invention can prevent the storage battery from being unable to start due to the power feed of the storage battery caused by the long-time parking of the vehicle, prevent the storage battery from being overcharged for a long time or the power consumption of the whole vehicle from being overlarge due to the power compensation, prolong the service life of the storage battery and reduce the cost.)
1. A storage battery power-on control method is characterized by comprising the following steps:
if the first voltage of the storage battery is smaller than the preset voltage threshold value, sending a power supplementing request;
acquiring current environment temperature, and acquiring target voltage corresponding to the current environment temperature according to a set target SOC value of the storage battery and a preset temperature-voltage relation table;
determining the power supply cut-off time according to a first voltage difference value of the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table;
and controlling a high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time.
2. The battery power-on control method according to claim 1, wherein the power-on cutoff time includes a first sub power-on cutoff time, a second sub power-on cutoff time, and a third sub power-on cutoff time, the first sub power-on cutoff time is smaller than the second sub power-on cutoff time, the second sub power-on cutoff time is smaller than the third sub power-on cutoff time, and the determining the power-on cutoff time according to a first voltage difference value between the first voltage and the target voltage and a preset voltage difference-power-on cutoff time relation table specifically includes:
if the first voltage difference value is greater than or equal to a first preset voltage difference threshold value and smaller than a second preset voltage difference threshold value, setting the first sub-power-supply cut-off time as the power-supply cut-off time;
if the first voltage difference value is greater than or equal to the second preset voltage difference threshold value and smaller than a third preset voltage difference threshold value, setting the second sub-power-supply cut-off time as the power-supply cut-off time;
and if the first voltage difference value is larger than or equal to the third preset voltage difference threshold value, setting the third sub-power-supply cut-off time as the power-supply cut-off time.
3. The method for controlling the storage battery to supplement power according to claim 1, wherein the controlling the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time specifically comprises:
and if the electricity supplementing cut-off time is less than or equal to a preset cut-off time threshold value and the electricity supplementing time of the storage battery reaches the electricity supplementing cut-off time, controlling the high-voltage power battery to stop supplementing electricity to the storage battery.
4. The storage battery power-on control method according to claim 3, wherein the controlling the high-voltage power battery to power on the storage battery according to the power-on cutoff time further comprises:
if the power supply cut-off time is smaller than or equal to a preset cut-off time threshold, detecting a first charging current of the direct current-direct current converter in real time;
and if the first charging current is less than or equal to a first preset current threshold, reducing the charging voltage of the DC-DC converter.
5. The storage battery power-supplementing control method according to claim 3, wherein the controlling the high-voltage power battery to supplement power to the storage battery according to the power-supplementing cut-off time specifically comprises:
if the power supply cut-off time is larger than the preset cut-off time threshold, in the power supply process, sending a DCDC standby instruction for controlling the DC-DC converter to be in standby according to a first preset time period, and detecting a second voltage of the storage battery, wherein the first preset time period is smaller than the power supply cut-off time;
and adjusting the power-supplementing cut-off time according to a second voltage difference value of the second voltage and the target voltage.
6. The battery power-on control method according to claim 5, wherein the adjusting the power-on cutoff time according to the second voltage difference value between the second voltage and the target voltage specifically comprises:
acquiring a second charging current of the DC-DC converter before the DC-DC converter starts to detect the second voltage;
if the second voltage difference value is smaller than or equal to a fourth preset voltage difference threshold value and the second charging current is smaller than a second preset current threshold value, reducing the power supply cut-off time;
and if the second voltage difference value is greater than the fourth preset voltage difference threshold value or the second charging current is greater than or equal to the second preset current threshold value, keeping the power supplementing cut-off time unchanged.
7. The battery charging control method according to claim 5, wherein if the charging cutoff time is greater than the preset cutoff time threshold, the method further comprises sending a DCDC standby command for controlling a dc-dc converter to be in standby according to a first preset time period, and detecting a second voltage of the battery, and then:
acquiring a real-time SOC value corresponding to the second voltage according to the current environment temperature and a preset voltage-temperature-SOC value relation table;
and if the real-time SOC value is larger than or equal to a preset SOC threshold value, reducing the charging voltage of the DC-DC converter.
8. The battery power-on control method according to any one of claims 1 to 7, wherein the sending of the power-on request if the first voltage of the battery is detected to be less than the preset voltage threshold value further comprises:
performing self-awakening according to a second preset time period, and detecting the first voltage of the storage battery;
if the first voltage is smaller than the preset voltage threshold, adding 1 to the feed count; if the first voltage is greater than or equal to the preset voltage threshold, clearing the feed count;
and if the continuous accumulated value of the feed count is greater than or equal to a preset time threshold, adjusting the second preset time period.
9. The battery power-on control method according to any one of claims 1 to 7, wherein if it is detected that the first voltage of the battery is less than the preset voltage threshold, the method sends a power-on request, and then further comprises:
if the first voltage is smaller than the preset voltage threshold, detecting whether a condition of entering power supply is met;
if the condition of entering power supplement is met, controlling the high-voltage power battery to supplement power for the storage battery;
in the power supplementing process, detecting whether a condition of quitting power supplementing is met or not;
and if the condition of quitting the power supplement is met, controlling the high-voltage power battery to stop supplementing power to the storage battery.
10. A storage medium storing computer instructions for performing all the steps of the battery charging control method according to any one of claims 1 to 9 when the computer instructions are executed by a computer.
11. An electronic device, comprising:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the battery charging control method of any of claims 1-9.
Technical Field
The invention relates to the technical field of automobiles, in particular to a storage battery power-on control method, a storage medium and electronic equipment.
Background
The electric vehicle is a vehicle which runs by using a vehicle-mounted power supply as power and driving wheels by using a motor. Electric automobile includes hybrid electric automobile and pure electric automobile, and electric automobile's low pressure system is supplied power by the 12V battery usually, when the vehicle parks for a long time, because the dark current of the last consumer of car still is continuously consuming the electric quantity of 12V battery, can lead to the battery feed for the unable high pressure of vehicle is gone up electrically, and then can't start.
At present, in order to prevent the battery from feeding, the following two methods are generally adopted for the power supplement of the battery:
1) detecting the voltage of a 12V storage battery in real time through an Electronic Control Unit (ECU), and if the voltage of the 12V storage battery is smaller than a preset voltage threshold value and the SOC of a power battery is larger than a preset SOC value, awakening a whole vehicle network and starting to supplement power for the 12V storage battery; after timing for a period of time, stopping power supply;
2) a storage battery controller is additionally arranged on the whole vehicle and used for monitoring the SOC of the storage battery, and a certain storage battery SOC threshold value is set as a condition for starting and stopping power supplement.
However, the inventor finds that the existing storage battery power supplementing method has the following defects in the process of realizing the invention:
1. the 12V storage battery voltage is detected in real time, and the SOC of the power battery is judged, so that the ECU and the battery management system which are responsible for detecting need to be in working states all the time when the whole vehicle is in dormancy, the electric quantity of the storage battery can be continuously consumed, and the feeding frequency of the storage battery and the power consumption of the whole vehicle are increased.
2. The power supply duration of the storage battery is not controlled in different gears according to different feed degrees, so that poor power supply effect is easily caused, the storage battery is overcharged for a long time or the power consumption of the whole vehicle is overlarge, and the service life of the storage battery is shortened.
3. The increase of the automatic power supply method of the battery controller increases the development cost and the man-hour of the controller, and deteriorates the vehicle yield.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides a storage battery power-supplementing control method, a storage medium and electronic equipment, which utilize the existing controller resources of a finished automobile to supplement power to a storage battery, do not need to increase a storage battery controller, reduce the development cost of the storage battery controller, ensure the power-supplementing effect by providing a more accurate power-supplementing method, prevent the power-supplementing effect from being poor or the storage battery from being overcharged for a long time, prevent the power consumption of the finished automobile from being overlarge, prolong the service life of the storage battery, save the power consumption of a high-voltage power battery and reduce the cost.
The technical scheme of the invention provides a storage battery power supply control method, which comprises the following steps:
if the first voltage of the storage battery is detected to be smaller than the preset voltage threshold, sending a power supplementing request;
acquiring current environment temperature, and acquiring target voltage corresponding to the current environment temperature according to a set target SOC value of the storage battery and a preset temperature-voltage relation table;
determining the power supply cut-off time according to a first voltage difference value of the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table;
and controlling a high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time.
Further, the supplementing cut-off time includes a first sub-supplementing cut-off time, a second sub-supplementing cut-off time, and a third sub-supplementing cut-off time, where the first sub-supplementing cut-off time is smaller than the second sub-supplementing cut-off time, the second sub-supplementing cut-off time is smaller than the third sub-supplementing cut-off time, and the supplementing cut-off time is determined according to a first voltage difference value between the first voltage and the target voltage and a preset voltage difference-supplementing cut-off time relation table, and specifically includes:
if the first voltage difference value is greater than or equal to a first preset voltage difference threshold value and smaller than a second preset voltage difference threshold value, setting the first sub-power-supply cut-off time as the power-supply cut-off time;
if the first voltage difference value is greater than or equal to the second preset voltage difference threshold value and smaller than a third preset voltage difference threshold value, setting the second sub-power-supply cut-off time as the power-supply cut-off time;
and if the first voltage difference value is larger than or equal to the third preset voltage difference threshold value, setting the third sub-power-supply cut-off time as the power-supply cut-off time.
Further, the controlling the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time specifically includes:
and if the electricity supplementing cut-off time is less than or equal to a preset cut-off time threshold value and the electricity supplementing time of the storage battery reaches the electricity supplementing cut-off time, controlling the high-voltage power battery to stop supplementing electricity to the storage battery.
Further, the control of the high-voltage power battery according to the power supply cut-off time to supply power to the storage battery also comprises the following steps:
if the power supply cut-off time is smaller than or equal to a preset cut-off time threshold, detecting a first charging current of the direct current-direct current converter in real time;
and if the first charging current is less than or equal to a first preset current threshold, reducing the charging voltage of the DC-DC converter.
Further, the controlling the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time specifically includes:
if the power supply cut-off time is larger than the preset cut-off time threshold, in the power supply process, sending a DCDC standby instruction for controlling the DC-DC converter to be in standby according to a first preset time period, and detecting a second voltage of the storage battery, wherein the first preset time period is smaller than the power supply cut-off time;
and adjusting the power-supplementing cut-off time according to a second voltage difference value of the second voltage and the target voltage.
Further, the adjusting the power-supply cut-off time according to the second voltage difference value between the second voltage and the target voltage specifically includes:
acquiring a second charging current of the DC-DC converter before the DC-DC converter starts to detect the second voltage;
if the second voltage difference value is smaller than or equal to a fourth preset voltage difference threshold value and the second charging current is smaller than a second preset current threshold value, reducing the power supply cut-off time;
and if the second voltage difference value is greater than the fourth preset voltage difference threshold value or the second charging current is greater than or equal to the second preset current threshold value, keeping the power supplementing cut-off time unchanged.
Further, if the power supply cut-off time is greater than the preset cut-off time threshold, a DCDC standby command for controlling the dc-dc converter to be in standby is sent according to a first preset time period, and a second voltage of the battery is detected, and then the method further includes:
acquiring a real-time SOC value corresponding to the second voltage according to the current environment temperature and a preset voltage-temperature-SOC value relation table;
and if the real-time SOC value is larger than or equal to a preset SOC threshold value, reducing the charging voltage of the DC-DC converter.
Further, if it is detected that the first voltage of the storage battery is smaller than the preset voltage threshold, the sending of the power supplement request further includes:
performing self-awakening according to a second preset time period, and detecting the first voltage of the storage battery;
if the first voltage is smaller than the preset voltage threshold, adding 1 to the feed count;
if the first voltage is greater than or equal to the preset voltage threshold, clearing the feed count;
and if the continuous accumulated value of the feed count is greater than or equal to a preset time threshold, adjusting the second preset time period.
Further, if it is detected that the first voltage of the storage battery is smaller than the preset voltage threshold, the method sends a power supplement request, and then further includes:
if the first voltage is smaller than the preset voltage threshold, detecting whether a condition of entering power supply is met;
if the condition of entering power supplement is met, controlling the high-voltage power battery to supplement power for the storage battery;
in the power supplementing process, detecting whether a condition of quitting power supplementing is met or not;
and if the condition of quitting the power supplement is met, controlling the high-voltage power battery to stop supplementing power to the storage battery.
The technical solution of the present invention also provides a storage medium, which stores computer instructions, and when a computer executes the computer instructions, the storage medium is used for executing all the steps of the storage battery power supply control method.
The technical solution of the present invention also provides an electronic device, including:
at least one processor; and the number of the first and second groups,
a memory communicatively coupled to the at least one processor; wherein the content of the first and second substances,
the memory stores instructions executable by the at least one processor to enable the at least one processor to perform the battery recharge control method as previously described.
After adopting above-mentioned technical scheme, have following beneficial effect: by detecting the first voltage of the storage battery, when the first voltage of the storage battery is smaller than the preset voltage threshold, sending a power supplementing request, acquiring the current environment temperature according to the set target SOC value, obtaining a target voltage corresponding to the current environmental temperature according to a preset temperature-voltage relation table, determining the power supply cut-off time according to a first voltage difference value of the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table, the high-voltage power battery is controlled to supplement power to the storage battery according to the power supplement cut-off time, the storage battery can be accurately supplemented without adding a storage battery controller, the development cost of the storage battery controller can be reduced, a more accurate electricity supplementing method is provided, poor electricity supplementing effect or long-time overcharge of the storage battery and overlarge electricity consumption of the whole vehicle are prevented, the service life of the storage battery is prolonged, the electricity consumption of the high-voltage power battery is saved, and the cost is reduced.
Drawings
The disclosure of the present invention will become more readily understood by reference to the drawings. It should be understood that: these drawings are for illustrative purposes only and are not intended to limit the scope of the present disclosure. In the figure:
fig. 1 is a flowchart of a method for controlling power supply to a storage battery according to an embodiment of the present invention;
fig. 2 is a flowchart of a method for controlling power supply to a storage battery according to a second embodiment of the present invention;
fig. 3 is a flowchart of a method for controlling power supply to a storage battery according to a third embodiment of the present invention;
fig. 4 is a schematic diagram of a hardware structure of an electronic device for battery charging control according to a fifth embodiment of the present invention.
Detailed Description
The following further describes embodiments of the present invention with reference to the accompanying drawings.
It is easily understood that according to the technical solution of the present invention, those skilled in the art can substitute various structures and implementation manners without changing the spirit of the present invention. Therefore, the following detailed description and the accompanying drawings are merely illustrative of the technical aspects of the present invention, and should not be construed as limiting or restricting the technical aspects of the present invention.
The terms of orientation of up, down, left, right, front, back, top, bottom, and the like referred to or may be referred to in this specification are defined relative to the configuration shown in the drawings, and are relative terms, and thus may be changed correspondingly according to the position and the use state of the device. Therefore, these and other directional terms should not be construed as limiting terms.
The storage battery power supply control method provided by the invention is suitable for both a hybrid electric vehicle and a pure electric vehicle.
Example one
As shown in fig. 1, fig. 1 is a working flow chart of a method for controlling a storage battery to supplement power according to an embodiment of the present invention, including:
step S101: if the first voltage of the storage battery is smaller than the preset voltage threshold value, sending a power supplementing request;
step S102: acquiring current environment temperature, and acquiring target voltage corresponding to the current environment temperature according to a set target SOC value and a preset temperature-voltage relation table;
step S103: determining the power supply cut-off time according to a first voltage difference value of the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table;
step S104: and controlling the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time.
Specifically, after the whole vehicle sleeps, a vehicle-mounted communication Terminal (TCU) periodically and periodically wakes up by a Real Time Clock (RTC), detects a first voltage of the storage battery, and if the first voltage of the storage battery is detected to be greater than or equal to a preset voltage threshold, the storage battery does not need to be supplied with power, and the TCU continues to enter a sleeping state; if the first voltage of the storage battery is detected to be smaller than the preset voltage threshold, it is indicated that the storage battery needs to be supplied with power, the TCU wakes up the whole Vehicle, and step S101 is executed to send a power supply request to a Vehicle Control Unit (VCU). When the VCU receives the power supplementing request, the VCU executes the step S102 to obtain the current environment temperature, and obtains the target voltage corresponding to the current environment temperature according to the set target SOC value of the storage battery and the preset temperature-voltage relation table; then, the VCU executes step S103 to determine a power supply cut-off time according to a first voltage difference value between the first voltage and the target voltage and a preset voltage difference-power supply cut-off time relation table; and finally, the VCU executes the step S104 to control the high-voltage power battery to supplement the power for the storage battery according to the power supplement cut-off time, so that the storage battery is prevented from being overcharged for a long time or the power consumption of the whole vehicle is prevented from being overlarge.
The preset voltage threshold can be set according to user requirements.
The target voltage is determined according to a target SOC value set by a system. According to the property of the storage battery, after the SOC value of the storage battery is determined, the voltage value of the storage battery has a one-to-one correspondence relation with the ambient temperature. Namely, when a target SOC value is stored in the system, the corresponding target voltage can be obtained according to the obtained ambient temperature. For example, when the set SOC value of the battery is 95%, if the current ambient temperature is 25 ℃, the corresponding target voltage is found to be 12.7V.
The voltage difference-power compensation cut-off time relation table can estimate the power compensation amount required by the storage battery according to the first voltage difference value and the correction coefficient, and calculates the power compensation time in an ideal state, namely T-alpha (U-alpha), according to the average output power of the stored Direct Current-Direct Current (DCDC) converterEyes of a user-U1) The power supply time is T; alpha is an equivalent coefficient; u shapeEyes of a userIs a target voltage; u shape1Is a first voltage; p is the average output power. And finally, setting the power supply time in an ideal state as the power supply cut-off time in different pressure difference ranges, namely the maximum power supply time, forming a pressure difference-power supply cut-off time relation table, and storing the table in the system in advance.
The method for controlling the power supplement of the storage battery provided by the embodiment of the invention comprises the steps of detecting the first voltage of the storage battery, sending a power supplement request when the first voltage of the storage battery is smaller than a preset voltage threshold, obtaining the current environment temperature, obtaining the target voltage corresponding to the current environment temperature according to the set target SOC value of the storage battery and the preset temperature-voltage relation table, determining the power supplement cut-off time according to the first voltage difference value between the first voltage and the target voltage and the preset pressure difference-power supplement cut-off time relation table, controlling the high-voltage power battery to supplement the power to the storage battery according to the power supplement cut-off time, realizing accurate power supplement of the storage battery without adding a storage battery controller, reducing the development cost of the storage battery controller, providing a more accurate power supplement method, preventing the power supplement effect from being poor or the storage battery from being overcharged for a long time, ensuring that the power consumption of the whole storage battery is too large, and further prolonging the service life of the storage battery, the electric quantity of the high-voltage power battery is saved, and the cost is reduced.
In one embodiment, the sending a power supplement request if it is detected that the first voltage of the storage battery is smaller than the preset voltage threshold further includes:
performing self-awakening according to a second preset time period, and detecting a first voltage of the storage battery;
if the first voltage is smaller than the preset voltage threshold, adding 1 to the feed count;
if the first voltage is greater than or equal to a preset voltage threshold, resetting the feed count;
and if the continuous accumulated value of the feed count is greater than or equal to the preset time threshold, adjusting a second preset time period.
Specifically, after the whole vehicle is in a sleep state, the TCU periodically wakes up according to a second preset time period set by the RTC, detects a first voltage of the storage battery in real time after the TCU wakes up, and judges whether the first voltage is smaller than a preset voltage threshold value, if so, the storage battery is fed, except for executing the steps S101 to S104, the timer is used for carrying out feeding count plus 1, the counter is added 1 every time the feeding is judged, otherwise, the counter is cleared and judges whether a continuous accumulated value of the feeding count is greater than or equal to a preset time threshold value (for example, 5 times), if the continuous accumulated value is greater than the threshold value, the second preset time period (namely, the self-waking time period) set by the RTC is too long, the second preset time period needs to be reduced, thereby automatically adjusting the self-waking time of the TCU, accurately controlling the power supplement process of the storage battery, and ensuring that the storage battery can be supplemented in time, the power feeding phenomenon of the storage battery is prevented.
In one embodiment, in order to improve safety of power supplement of the storage battery, if it is detected that the first voltage of the storage battery is smaller than the preset voltage threshold, the method further includes:
if the first voltage is smaller than the preset voltage threshold, detecting whether a condition of entering power supply is met;
if the condition of entering power supply is met, controlling the high-voltage power battery to supply power to the storage battery;
in the power supplementing process, detecting whether a condition of quitting power supplementing is met or not;
and if the condition of quitting the power supplement is met, controlling the high-voltage power battery to stop supplementing power to the storage battery.
In one embodiment, in order to further improve the safety of the power supplement of the storage battery, the detecting whether the condition of entering the power supplement is met specifically includes:
detecting whether the following conditions are met simultaneously:
condition A, passing anti-theft verification;
b, receiving a power supplement request;
the condition C is that the current environment temperature meets a preset first temperature threshold;
the condition D is that the SOC value of the high-voltage power battery is greater than or equal to a preset SOC threshold value;
condition E, no high-voltage system fault exists in the whole vehicle;
and if the conditions A-E are simultaneously met, determining that the power supplementing condition is met.
In one embodiment, in order to further improve the safety of the power compensation of the storage battery and ensure the power compensation effect, the detecting whether the condition of exiting the power compensation is met specifically includes:
detecting whether any one of the following conditions is met:
condition F, the battery temperature is greater than a second temperature threshold;
condition G, a fault in the high voltage power battery;
conditional H, DCDC converter operation exception;
the condition I is that the SOC value of the high-voltage power battery is smaller than a preset SOC threshold value;
condition J, receiving other wake-up signals;
the condition K is that the power supply cut-off time is reached;
and if any one of the conditions F-K is met, determining that the condition of quitting power supplement is met.
Example two
As shown in fig. 2, fig. 2 is a flowchart of a method for controlling a storage battery to supplement power according to a second embodiment of the present invention, and the method includes:
step S201: detecting a first voltage of the storage battery when the storage battery is automatically awakened;
step S202: judging whether the first voltage is smaller than a preset voltage threshold value or not;
step S203: continuously entering a dormant state;
step S204: sending a power supplementing request;
step S205: acquiring current environment temperature, and acquiring target voltage corresponding to the current environment temperature according to a set target SOC value of the storage battery and a preset temperature-voltage relation table;
step S206: calculating a first voltage difference value of the target voltage and the first voltage;
step S207: judging whether the first differential pressure value is greater than or equal to a first preset differential pressure threshold value and smaller than a second preset differential pressure threshold value or not;
step S208: setting the first sub-power-supply cut-off time as the power-supply cut-off time;
step S209: judging whether the first differential pressure value is greater than or equal to a second preset differential pressure threshold value and smaller than a third preset differential pressure threshold value or not;
step S210: setting the second sub-power-supply cut-off time as the power-supply cut-off time;
step S211: judging whether the first differential pressure value is greater than or equal to a third preset differential pressure threshold value or not;
step S212: setting the third sub-power-supply cut-off time as the power-supply cut-off time;
step S213: and controlling the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time.
Specifically, after the whole vehicle is in a sleep state, the TCU periodically self-wakes up at regular time according to the RTC, when the TCU automatically wakes up, the TCU executes the steps S201 to S202, and determines whether the first voltage is smaller than the preset voltage threshold in the step S202, if so, the TCU executes the step S204, otherwise, the TCU executes the step S203 to continue to enter the sleep state. When the VCU receives the power supplement request, the VCU performs step S205-step S207, and in step S207, determines whether the first differential pressure value is greater than or equal to a first preset differential pressure threshold value and smaller than a second preset differential pressure threshold value, if so, performs step S208, otherwise, performs step S209; in step S209, it is determined whether the first differential pressure value is greater than or equal to a second preset differential pressure threshold value and smaller than a third preset differential pressure threshold value, if so, step S210 is executed, otherwise, step S211 is executed; in step S211, it is determined whether the first differential pressure value is greater than or equal to a third preset differential pressure threshold, if so, step S212 is executed, otherwise, step S205 is executed; and finally, step S213 is executed to control the high-voltage power battery to supplement power to the storage battery according to the power supplement cut-off time, the power supplement cut-off time under different gears, namely the maximum power supplement time, is determined by grading and dividing the feeding degree according to the first voltage difference value, the first preset voltage difference threshold value, the second preset voltage difference threshold value and the third preset voltage difference threshold value of the target voltage and the first voltage, and the high-voltage power battery is controlled to supplement power to the storage battery according to the different power supplement cut-off times, so that different power supplement times are set for different feeding degrees, the long-time overcharge of the storage battery due to the power supplement effect difference caused by insufficient power supplement time or the long power supplement time is prevented, the power consumption of the whole vehicle is too large, the service life of the storage battery is prolonged, the electric quantity of the high-voltage power battery is saved, and the cost is reduced.
The first preset pressure difference threshold, the second preset pressure difference threshold and the third preset pressure difference threshold can be set according to requirements.
According to the method for controlling the power supplement of the storage battery, the power supplement cut-off time under different gears, namely the maximum power supplement time, is determined by grading and dividing the feeding degree according to the first voltage difference value between the target voltage and the first voltage, the first preset voltage difference threshold value, the second preset voltage difference threshold value and the third preset voltage difference threshold value, and the high-voltage power battery is controlled to supplement power to the storage battery according to the different power supplement cut-off times, so that different power supplement times are set for different feeding degrees, the problem that the power supplement effect is poor due to insufficient power supplement time or the storage battery is overcharged for a long time due to overlong power supplement time is solved, the service life of the storage battery is prolonged, the electric quantity of the high-voltage power battery is saved, and the cost is reduced.
EXAMPLE III
On the basis of the first embodiment or the second embodiment, the third embodiment is an embodiment that the power supply cut-off time and the charging voltage are adjusted in real time according to the power supply state of the storage battery after the power supply cut-off time is determined, and therefore, the same parts as those of the first embodiment and the second embodiment are not described again. As shown in fig. 3, fig. 3 is a flowchart of a method for controlling a storage battery to supplement power according to a third embodiment of the present invention, and the method includes:
step S301: judging whether the power supply cut-off time is less than or equal to a preset cut-off time threshold value or not;
step S302: detecting a first charging current of the DCDC converter in real time;
step S303: judging whether the first charging current is less than or equal to a first preset current threshold value or not;
step S304: detecting a second voltage of the storage battery according to a first preset time period;
step S305: calculating a second voltage difference value between the second voltage and the target voltage;
step S306: acquiring a second charging current of the DCDC converter before the DCDC converter starts to detect a second voltage;
step S307: judging whether the second differential pressure value is smaller than or equal to a fourth preset differential pressure threshold value or not and whether the second charging current is smaller than a second preset current threshold value or not;
step S308: reducing the cut-off time of power supply;
step S309: keeping the cut-off time of the power supply unchanged;
step S310: acquiring a real-time SOC value corresponding to the second voltage according to the current environment temperature and a preset voltage-temperature-SOC value relation table;
step S311: judging whether the real-time SOC value is greater than or equal to a preset SOC threshold value;
step S312: reducing a charging voltage of the DCDC converter;
step S313: judging whether the power supply time of the storage battery reaches the power supply cut-off time or not;
step S314: and controlling the high-voltage power battery to stop supplementing electricity to the storage battery.
Specifically, after the VCU determines the power supply cut-off time by the method of the first embodiment or the second embodiment, step S301 is executed to determine whether the power supply cut-off time is less than or equal to a preset cut-off time threshold, if so, step S302 to step S303 are executed, otherwise, step S304 to step S306 are executed; in step S303, determining whether the first charging current is less than or equal to a first preset current threshold, if so, executing step S312, otherwise, continuing to execute step S302; in step S306, the VCU periodically sends a standby instruction to the DCDC converter during the power compensation process, so that the DCDC converter enters a standby state, and obtains a second charging current before the DCDC converter starts to detect the second voltage, where the second charging current is an output current of the DCDC converter; then, step S307 is executed to determine whether the second voltage difference value is less than or equal to a fourth preset voltage difference threshold value, and whether the second charging current is less than a second preset current threshold value, if yes, step S308 is executed, otherwise, step S309 is executed; then, step S310-step S311 are executed, and in step S310, the SOC value corresponding to the second voltage is found according to the current environmental temperature obtained in step S102 and/or step S205 and the preset voltage-temperature-SOC value relation table; in step S311, determining whether the real-time SOC value is greater than or equal to a preset SOC threshold, if so, executing step S312 to reduce the charging voltage of the DCDC converter, otherwise, continuing to execute step S310; and finally, executing a step S313 to judge whether the power supplementing time of the storage battery reaches the power supplementing cut-off time, if so, executing a step S314, ending, otherwise, continuing to execute a step S301, periodically detecting the power supplementing cut-off time, comparing the power supplementing cut-off time with a preset cut-off time threshold value, dynamically correcting the actual power supplementing time, stopping power supplementing in advance when the power supplementing effect is reached, and saving the power consumption of the high-voltage power battery. When the SOC value of the storage battery reaches a set threshold value, the output voltage of the DCDC converter is reduced, the failure of the storage battery caused by long-time constant-voltage floating charging can be prevented, and the service life of the storage battery is prolonged.
The preset cut-off time threshold can be set according to user requirements, and can be set to be the same as the first sub-power-supply cut-off time or other time values.
The fourth preset differential pressure threshold, the first preset current threshold and the second preset current threshold may be set according to user requirements, for example, the fourth preset differential pressure threshold is set to 0.1V, and the first preset current threshold and the second preset current threshold are both set to 1A. When the fourth preset differential pressure threshold and the second preset current threshold are set to be smaller, step S308, step S310 to step S313 may not be executed, and step S314 may be directly executed to control the high-voltage power battery to stop supplying power to the storage battery.
The preset SOC threshold may be set according to a user requirement, for example, the preset SOC threshold is set to 95%.
For example, when the step S301 is executed to determine that the power supplement cut-off time is less than or equal to the preset cut-off time threshold and detect that the power supplement time of the storage battery reaches the power supplement cut-off time, the step S314 is directly executed to control the high-voltage power battery to stop power supplement on the storage battery, so that the steps S302 to S303 and S312 are not executed, the charging voltage of the DCDC converter does not need to be reduced, and the execution sequence of the steps S302 to S303, S312 and 313 to S314 does not affect the effect achieved by the present invention. Similarly, the sequence of steps S304-S312 and steps S313-S314 may be interchanged, or may be executed simultaneously.
According to the storage battery power-supplementing control method provided by the embodiment of the invention, the actual power-supplementing duration can be dynamically corrected by periodically detecting the power-supplementing cut-off time and comparing the power-supplementing cut-off time with the preset cut-off time threshold, the power supplementing is stopped in advance when the power-supplementing effect is achieved, and the power consumption of a high-voltage power battery is saved. When the SOC value of the storage battery reaches a set threshold value, the output voltage of the DCDC converter is reduced, the failure of the storage battery caused by long-time constant-voltage floating charging can be prevented, and the service life of the storage battery is prolonged.
Example four
An embodiment of the present invention provides a storage medium, where the storage medium is used to store computer instructions, and when the computer executes the computer instructions, the storage medium is used to execute all the steps of the battery power supply control method in any one of the method embodiments described above.
EXAMPLE five
As shown in fig. 4, a schematic diagram of a hardware structure of an electronic device for controlling battery charging according to a fifth embodiment of the present invention includes:
at least one processor 401; and the number of the first and second groups,
a memory 402 communicatively coupled to the at least one processor 401; wherein the content of the first and second substances,
the memory 402 stores instructions executable by the at least one processor 401 to be executed by the at least one processor 401 to enable the at least one processor 401 to perform the battery recharge control method as previously described.
In fig. 4, one processor 401 is taken as an example.
The Electronic device is preferably an Electronic Control Unit (ECU).
The electronic device may further include: an input device 403 and an output device 404.
The processor 401, the memory 402, the input device 403, and the output device 404 may be connected by a bus or other means, and are illustrated as being connected by a bus.
The memory 402, which is a non-volatile computer-readable storage medium, can be used to obtain non-volatile software programs, non-volatile computer-executable programs, and modules, such as program instructions/modules corresponding to the battery recharging control method in the embodiments of the present application, for example, the method flows shown in fig. 1-3. The processor 401 executes various functional applications and data processing by running the nonvolatile software programs, instructions and modules acquired in the memory 402, so as to implement the battery charging control method in the above-described embodiment.
The memory 402 may include an acquisition program area and an acquisition data area, wherein the acquisition program area may acquire an operating system, an application program required for at least one function; the acquisition data area may acquire data created according to the use of the battery charge control method, or the like. Further, the memory 402 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some embodiments, memory 402 optionally includes memory located remotely from processor 401, and these remote memories may be connected over a network to a device that performs the battery recharging control method. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input device 403 may receive input user clicks and generate signal inputs related to user settings and function control of the battery recharge control method. The output device 404 may include a display device such as a display screen.
When the one or more modules are acquired in the memory 402 and executed by the one or more processors 401, the battery charging control method in any of the above-described method embodiments is performed.
The product can execute the method provided by the embodiment of the application, and has the corresponding functional modules and beneficial effects of the execution method. For technical details that are not described in detail in this embodiment, reference may be made to the methods provided in the embodiments of the present application.
The electronic device of embodiments of the present invention exists in a variety of forms, including but not limited to:
(1) the ECU is also called a traveling computer, a vehicle-mounted computer and the like. The digital signal processor mainly comprises a microprocessor (CPU), a memory (ROM and RAM), an input/output interface (I/O), an analog-to-digital converter (A/D), a shaping circuit, a driving circuit and other large-scale integrated circuits.
(2) Mobile communication devices, which are characterized by mobile communication capabilities and are primarily targeted at providing voice and data communications. Such terminals include smart phones (e.g., iphones), multimedia phones, functional phones, and low-end phones, among others.
(3) The ultra-mobile personal computer equipment belongs to the category of personal computers, has calculation and processing functions and generally has the characteristic of mobile internet access. Such terminals include PDA, MID, and UMPC devices, among others.
(4) Portable entertainment devices such devices may display and play multimedia content. Such devices include audio and video players (e.g., ipods), handheld game consoles, electronic books, as well as smart toys and portable car navigation devices.
(5) The server is similar to a general computer architecture, but has higher requirements on processing capability, stability, reliability, safety, expandability, manageability and the like because of the need of providing highly reliable services.
(6) And other electronic devices with data interaction functions.
Furthermore, the logic instructions in the memory 402 may be implemented in software functional units and may be acquired from a computer readable storage medium when the logic instructions are sold or used as a stand-alone product. Based on such understanding, the technical solution of the present invention or a part thereof, which essentially contributes to the prior art, can be embodied in the form of a software product, which is obtained from a storage medium and includes instructions for causing a mobile terminal (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: various media capable of acquiring program codes, such as a usb disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment of the present invention. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be obtained from a computer-readable storage medium, such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the embodiments of the present invention, and not to limit the same; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.