CN112455281A - Vehicle and low-voltage battery's benefit electric system - Google Patents
Vehicle and low-voltage battery's benefit electric system Download PDFInfo
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- CN112455281A CN112455281A CN201910846652.XA CN201910846652A CN112455281A CN 112455281 A CN112455281 A CN 112455281A CN 201910846652 A CN201910846652 A CN 201910846652A CN 112455281 A CN112455281 A CN 112455281A
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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
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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 vehicle and a low-voltage storage battery power supply system, wherein the system comprises: the operation circuit is used for acquiring a first voltage output by the positive electrode output end of the low-voltage storage battery and outputting an activation voltage to the control unit to wake up the control unit when the first voltage is lower than a preset low-voltage threshold; and the control unit is used for sending a wake-up message to the bus after being awakened so as to wake up the energy storage system. The power supplementing system of the low-voltage storage battery can reduce the number of components and the number of wire harnesses and reduce the cost on the premise of charging the low-voltage storage battery.
Description
Technical Field
The invention relates to the technical field of vehicles, in particular to a power supplementing system of a low-voltage storage battery and a vehicle with the power supplementing system.
Background
With the emergence of new energy vehicles, the charging of the vehicle-mounted low-voltage battery is realized by using an energy storage system to charge the low-voltage power grid and the low-voltage battery through a DCDC converter instead of using a belt pulley system to drive a generator to generate power to charge the low-voltage power grid and the low-voltage battery by using a traditional vehicle engine. This allows the low-voltage battery to be charged even if the vehicle drive system is not operating. When the vehicle is not started for a long time, low-voltage battery feeding occurs, so that the vehicle cannot be powered on and started.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first object of the present invention is to provide a low-voltage battery charging system that can reduce the number of components and the number of wire harnesses and reduce the cost, while charging the low-voltage battery.
A second object of the invention is to propose a vehicle.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a low-voltage battery power supply system, including: the operation circuit is used for acquiring a first voltage output by the positive electrode output end of the low-voltage storage battery and outputting an activation voltage to the control unit to wake up the control unit when the first voltage is lower than a preset low-voltage threshold; and the control unit is used for sending a wake-up message to the bus after being awakened so as to wake up the energy storage system.
According to the power supply system of the low-voltage storage battery, the operation circuit collects the first voltage output by the positive electrode output end of the low-voltage storage battery, and outputs the activation voltage to the control unit to wake up the control unit when the first voltage is lower than the preset low-voltage threshold value, and the control unit sends a wake-up message to the bus to wake up the energy storage system after being woken up. Therefore, the system can reduce the number of components and the number of wire harnesses and reduce the cost on the premise of charging the low-voltage storage battery.
In addition, the power supply system of the low-voltage storage battery provided according to the above embodiment of the invention may further have the following additional technical features:
according to an embodiment of the present invention, the control unit is specifically configured to: and after the low-voltage storage battery is awakened, acquiring the first voltage output by the positive output end of the low-voltage storage battery, and sending the awakening message to the bus when the first voltage is lower than the low-voltage threshold value.
According to an embodiment of the present invention, the system for supplementing power to a low-voltage battery further includes: the energy storage system is used for supplying power to the voltage converter after being awakened so as to awaken the voltage converter; and the voltage converter is used for charging the low-voltage storage battery after being awakened.
According to an embodiment of the invention, the control unit is further configured to: and when the difference value of the first voltages acquired twice in succession is smaller than a preset difference threshold value and the continuous acquisition times exceed a preset time threshold value, stopping sending the wake-up message to the bus and controlling the voltage converter to stop charging the low-voltage storage battery.
According to an embodiment of the present invention, the system for supplementing power to a low-voltage battery further includes: the current sensor is used for collecting the charging current of the low-voltage storage battery; the control unit is further configured to: and when the charging current is smaller than a preset charging current threshold value, stopping sending the awakening message to the bus, and controlling the voltage converter to stop charging the low-voltage storage battery.
According to an embodiment of the invention, the energy storage system is further configured to: and entering a dormant state when the time for which the awakening message cannot be received exceeds a preset first time threshold.
According to an embodiment of the invention, the voltage converter is further configured to: and entering a dormant state when the charging time of the low-voltage storage battery exceeds a preset second time threshold.
According to one embodiment of the invention, the control unit is integrated in any one of the following devices: the device comprises a voltage converter, a vehicle control unit and a vehicle body controller.
According to one embodiment of the invention, the energy storage system is a high voltage power battery.
In order to achieve the above object, a second aspect of the present invention provides a vehicle including the low-voltage battery power supply system.
According to the vehicle provided by the embodiment of the invention, through the power supplementing system of the low-voltage storage battery, the number of components and the number of wire harnesses can be reduced on the premise of charging the low-voltage storage battery, and the cost is reduced.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a block schematic diagram of a low-voltage battery power replenishment system according to an embodiment of the present invention;
FIG. 2 is a block schematic diagram of a low-voltage battery power-up system according to one embodiment of the present invention; and
FIG. 3 is a block schematic diagram of a vehicle according to an embodiment of the invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The present application is made based on the recognition and study of the following problems by the inventors:
the intelligent power supply function appears in the market aiming at the problem that the vehicle cannot be powered on and started due to the fact that the vehicle can not be started for a long time due to the fact that low-voltage battery feeding can occur, namely under the condition that the vehicle is powered off and is stopped, the output voltage of the low-voltage battery is monitored, and once the voltage is lower than a certain specific value, the energy storage system is automatically started to charge the low-voltage battery.
In the related art, an Intelligent Battery Sensor (IBS) is fixed to the positive electrode of the low-voltage Battery, the Sensor monitors the voltage and current of the low-voltage Battery, and sends the voltage and current to a master node controller (e.g., a vehicle controller, a body controller, etc.) through LIN (Local Interconnect Network) communication, and the master node controller performs a control strategy according to received information to determine whether to wake up an energy storage device to charge the low-voltage Battery, when the charging is stopped, and the like.
The above scheme can acquire the most real output voltage and current. However, the above solution has the following disadvantages: firstly, by using LIN communication, a main node controller needing to receive information needs to increase or reserve an LIN channel, and the using amount of wiring harnesses is increased; second, the number of components on the vehicle is increased, and the presence of IBS leads to an increase in component cost.
Therefore, the present application provides a low-voltage battery charging system that can avoid using IBS and reduce the amount of wire harnesses in view of the above-described deficiencies of components.
The following describes a low-voltage battery electricity replenishment system and a vehicle having the same according to an embodiment of the present invention with reference to the drawings.
Fig. 1 is a block schematic diagram of a low-voltage battery power replenishment system according to an embodiment of the invention.
As shown in fig. 1, the low-voltage battery power supply system according to the embodiment of the present invention may include: an arithmetic circuit 10, a control unit 20 and an energy storage system 30. In one embodiment of the present invention, energy storage system 30 may be a high voltage power battery.
The operation circuit 10 is configured to collect a first voltage output by the positive output end of the low-voltage battery, and output an activation voltage to the control unit 20 when the first voltage is lower than a preset low-voltage threshold value, so as to wake up the control unit 20. The control unit 20 is configured to send a wake-up message to the bus after being woken up, so as to wake up the energy storage system 30, where the preset low voltage threshold may be calibrated according to an actual situation.
According to an embodiment of the present invention, the control unit 20 is specifically configured to: and after being awakened, acquiring a first voltage output by the positive output end of the low-voltage storage battery, and sending an awakening message to the bus when the first voltage is lower than a low-voltage threshold value.
Further, according to an embodiment of the present invention, as shown in fig. 2, the power supply system of the low-voltage battery may further include: and the voltage converter 40, wherein the energy storage system 30 supplies power to the voltage converter after being awakened so as to awaken the voltage converter 40, and the voltage converter 40 converts the high voltage output by the energy storage system 30 into low voltage to charge the low voltage storage battery after being awakened.
In one embodiment of the present invention, the control unit 20 may be integrated in any of the following devices: a voltage converter, a vehicle control unit and a vehicle body controller (such as a controller near a low-voltage battery on a wiring harness). That is, combine existing part, integrated voltage detection and awakening function, reduced the hardware cost.
Specifically, as shown in fig. 2, it is determined whether the low-voltage battery needs to be recharged based on the actual voltage value of the low-voltage battery. In a voltage converter (e.g., a DCDC converter), a voltage collection point is provided in the housing of the DCDC converter near the positive output terminal. Considering that the low energy loss of the DCDC converter is very close to the low-voltage battery, a shorter and thicker cable is used on a wiring harness, so that the voltage acquired at the position is more accurate, and compared with the LIN bus, the hard wire adopted for communication has the advantages of rapidness in response, lower energy consumption, low possibility of information error and improvement of the accuracy of information acquisition.
The operation circuit 10 collects a first voltage output by the positive output end of the low-voltage storage battery and then divides the first voltage into two paths (wherein the first voltage and the second voltage are equal and are the first voltage), one path is calculated by the operation circuit 10 and then is input to the controller as a wake-up source, and the other path is directly input to an AD sampling port of the controller. Specifically, after the first path of voltage is operated, when the input voltage is lower than the preset low voltage threshold, the operation circuit outputs a voltage (activation voltage) higher than the activation effective voltage value to the control unit 20 to wake up the control unit 20, and after the control unit 20 wakes up, the AD sampling port is powered on to work. At this time, the AD sampling port collects a first voltage (a second path of voltage) output by the complete machine output end of the low-voltage storage battery, the control unit 20 reads the value (the first voltage), compares the value with a preset low-voltage threshold value, judges whether charging is needed or not, judges that charging is needed when the first voltage is lower than the low-voltage threshold value, the control unit 20 continuously sends a wake-up message to the bus, wakes up the energy storage system 30, starts working after the wake-up energy storage system 30 is awakened, supplies power to the voltage converter 40 to wake up the voltage converter 40, and charges the low-voltage storage battery after the voltage converter 40 is awakened. Therefore, the judgment is carried out through the two paths of voltages, the misjudgment can be reduced, and the probability of the misstarting of the energy storage system is reduced.
According to an embodiment of the invention, the control unit 20 is further adapted to: and when the difference value of the first voltages acquired continuously for two adjacent times is smaller than a preset difference value threshold value and the continuous acquisition times exceed a preset time threshold value, stopping sending the wake-up message to the bus and controlling the voltage converter to stop charging the low-voltage storage battery. The preset difference threshold value and the preset time threshold value can be calibrated according to actual conditions.
Specifically, in the charging process, the voltage converter 40 stops supplying power to the low-voltage storage battery at certain intervals, the actual voltage at the positive electrode output end of the low-voltage storage battery can be directly acquired by the AD sampling, and the control unit 20 records the voltage value of the AD sampling. When the difference value of the first voltages acquired continuously for two adjacent times is smaller than the preset difference threshold value and the continuous acquisition time exceeds the preset time threshold value (for example, the continuous acquisition time is 10 times, the preset time threshold value is 8 times, and the difference value of the first voltages acquired continuously for two adjacent times is smaller than the preset difference threshold value) it is determined that the low-voltage storage battery is substantially full, at this time, the control unit 20 stops sending the wake-up message, and the voltage converter 40 stops outputting the low-voltage power.
According to another embodiment of the present invention, the system for supplementing power to the low-voltage battery may further include: the current sensor is used for collecting the charging current of the low-voltage storage battery; the control unit 20 is further configured to: and when the charging current is smaller than the preset charging current threshold value, stopping sending the awakening message to the bus, and controlling the voltage converter to stop charging the low-voltage storage battery.
That is, it may also be determined that the low-voltage battery stops charging according to the charging current, for example, when the collected charging current of the low-voltage battery is smaller than a preset charging current threshold, which indicates that the low-voltage battery is substantially full, at this time, the control unit 20 stops sending the wake-up message, and the voltage converter 40 stops outputting the low voltage.
In one embodiment of the present invention, energy storage system 30 is further configured to: and when the time for not receiving the awakening message exceeds a preset first time threshold, entering a dormant state. The first time threshold value can be calibrated according to actual conditions.
In one embodiment of the present invention, the voltage converter 40 is further configured to: and entering a dormant state when the time for stopping charging the low-voltage storage battery exceeds a preset second time threshold. And the second time threshold value can be calibrated according to the actual situation.
That is, when the control unit 20 stops sending the wake-up message and the voltage converter 40 stops outputting the low voltage, the first preset time threshold is delayed, and then the energy storage system 30 enters the sleep state if the wake-up message is not received. When the time for which the voltage converter 40 stops charging the low-voltage battery exceeds the second time threshold, the sleep state is entered until the next activation/wake-up.
In summary, according to the power supply system of the low-voltage battery in the embodiment of the invention, the operation circuit collects the first voltage output by the positive output end of the low-voltage battery, and outputs the activation voltage to the control unit to wake up the control unit when the first voltage is lower than the preset low-voltage threshold, and the control unit sends the wake-up message to the bus to wake up the energy storage system after being woken up. Therefore, the system can reduce the number of components and the number of wire harnesses and reduce the cost on the premise of charging the low-voltage storage battery.
FIG. 3 is a block schematic diagram of a vehicle according to an embodiment of the invention.
As shown in fig. 3, a vehicle 100 according to an embodiment of the present invention may include the low-voltage battery charging system 110.
According to the vehicle provided by the embodiment of the invention, through the power supplementing system of the low-voltage storage battery, the number of components and the number of wire harnesses can be reduced on the premise of charging the low-voltage storage battery, and the cost is reduced.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. An electrical recharging system for a low-voltage battery, comprising:
the operation circuit is used for acquiring a first voltage output by the positive electrode output end of the low-voltage storage battery and outputting an activation voltage to the control unit to wake up the control unit when the first voltage is lower than a preset low-voltage threshold;
and the control unit is used for sending a wake-up message to the bus after being awakened so as to wake up the energy storage system.
2. The electrical recharging system of claim 1, wherein the control unit is specifically configured to:
and after the low-voltage storage battery is awakened, acquiring the first voltage output by the positive output end of the low-voltage storage battery, and sending the awakening message to the bus when the first voltage is lower than the low-voltage threshold value.
3. The electrical recharging system of claim 2, further comprising:
the energy storage system is used for supplying power to the voltage converter after being awakened so as to awaken the voltage converter;
and the voltage converter is used for charging the low-voltage storage battery after being awakened.
4. The electrical recharging system of claim 3, wherein the control unit is further configured to:
and when the difference value of the first voltages acquired twice in succession is smaller than a preset difference threshold value and the continuous acquisition times exceed a preset time threshold value, stopping sending the wake-up message to the bus and controlling the voltage converter to stop charging the low-voltage storage battery.
5. The electrical recharging system of claim 3, further comprising:
the current sensor is used for collecting the charging current of the low-voltage storage battery;
the control unit is further configured to: and when the charging current is smaller than a preset charging current threshold value, stopping sending the awakening message to the bus, and controlling the voltage converter to stop charging the low-voltage storage battery.
6. The electrical charging system of claim 4 or 5, wherein the energy storage system is further configured to:
and entering a dormant state when the time for which the awakening message cannot be received exceeds a preset first time threshold.
7. The electrical charging system of claim 4 or 5, wherein the voltage converter is further configured to:
and entering a dormant state when the charging time of the low-voltage storage battery exceeds a preset second time threshold.
8. The electrical recharging system of claim 1, wherein the control unit is integrated into any one of:
the device comprises a voltage converter, a vehicle control unit and a vehicle body controller.
9. The electrical recharging system of claim 1 wherein said energy storage system is a high voltage power battery.
10. A vehicle, characterized by comprising: a system for supplementing a low-voltage battery according to any one of claims 1 to 9.
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| CN201910846652.XA CN112455281A (en) | 2019-09-09 | 2019-09-09 | Vehicle and low-voltage battery's benefit electric system |
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| CN201910846652.XA CN112455281A (en) | 2019-09-09 | 2019-09-09 | Vehicle and low-voltage battery's benefit electric system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113085654A (en) * | 2021-05-07 | 2021-07-09 | 地上铁租车（深圳）有限公司 | Automatic power shortage prevention control method and system for low-voltage battery of electric vehicle |
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| CN108001277A (en) * | 2017-12-13 | 2018-05-08 | 奇瑞汽车股份有限公司 | Electric vehicle storage battery power supplementing system and method |
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Application publication date: 20210309 |