CN113650574A - Vehicle storage battery electricity supplementing system - Google Patents
Vehicle storage battery electricity supplementing system Download PDFInfo
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- CN113650574A CN113650574A CN202110846790.5A CN202110846790A CN113650574A CN 113650574 A CN113650574 A CN 113650574A CN 202110846790 A CN202110846790 A CN 202110846790A CN 113650574 A CN113650574 A CN 113650574A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/03—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for
- B60R16/033—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for supply of electrical power to vehicle subsystems or for characterised by the use of electrical cells or batteries
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
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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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Secondary Cells (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention provides a vehicle storage battery electricity supplementing system, which comprises a vehicle control unit VCU, a battery management system BMS and a low-voltage storage battery sensor, wherein a vehicle body controller BCM and a gateway are sequentially in communication connection through a bus, a mapping relation table is formed by calibrating an open-circuit voltage OCV, a constant current I and a temperature value of a low-voltage storage battery and a battery state of charge SOC (state of charge) and is recorded in the battery management system, the low-voltage storage battery sensor is used for constantly acquiring a voltage value, a current value and a temperature value of the low-voltage storage battery at regular time and calculating the current SOC of the low-voltage storage battery through an ampere-hour integration method, and if the current SOC is lower than a threshold value of the low-voltage storage battery, the constant current I is acquired by inquiring the mapping relation table through the battery management system to supplement electricity for the low-voltage storage battery. Compared with the prior art, the invention can effectively supplement power for the low-voltage storage battery, thereby prolonging the service life of the storage battery.
Description
Technical Field
The invention relates to the technical field of vehicle batteries, in particular to a vehicle storage battery power supplementing system.
Background
A vehicle battery, and a battery used in an automobile. The device is a device for converting chemical energy into electric energy, belongs to a direct current power supply and has the following functions: when the engine is started, a strong starting current is provided for the starter; when the generator is overloaded, the generator can be assisted to supply power to the electric equipment; when the engine is in idle speed, supplying power to the electric equipment; the capacitor can be used as a large-capacity capacitor and can also protect electrical appliances of automobiles; when the voltage at the end of the generator is higher than the electromotive force of the lead storage battery, a part of electric energy is converted into chemical energy to be stored, namely, the electric energy is charged. The traditional lead-acid accumulator consists of positive and negative plates, partition board, casing, electrolyte and terminal, and the discharge chemical reaction is carried out by means of positive and negative plate active material under the action of electrolyte, where the grid of the plate is made of Pb-Sb alloy.
The quiescent current of the whole traditional fuel vehicle storage battery can be controlled to be 5-15mA generally, for more electronic equipment integrated by an intelligent new energy vehicle, various auxiliary driving services, comfortable convenience functions and remote service functions lead the quiescent current of the whole vehicle to be several times that of the traditional vehicle, the electromotion, light weight, integration and intellectualization of the vehicle are inevitable development trends, and the lead-acid storage battery with small capacity and low cost is usually adopted for the model selection of the storage battery. In order to ensure that the static storage time of the whole vehicle does not influence the starting of the vehicle, the static storage time of the vehicle is prolonged by intelligent power supply, and the normal starting of the vehicle is ensured. The current intelligent power supply scheme is basically that the low-voltage storage battery voltage is collected, the low electric quantity of the storage battery is judged through comparing the set voltage threshold value, so that the intelligent power supply is started, and then the charging is finished at a fixed time.
Disclosure of Invention
The existing storage battery power supplementing scheme generally has the following problems: 1) the low-voltage storage battery is connected with other low-voltage electric appliances and a DCDC charging device in parallel, the voltage acquisition scheme is realized by acquiring an input voltage module of an intelligent power supply module which is connected in parallel, the voltage of the storage battery is theoretically equal to the input voltage of other equipment, and actually, the voltage difference between the measured voltage and the voltage of the storage battery due to the voltage drop of a parallel loop can reach more than 0.5V, so that the capacity of the storage battery has more than 30% of error. 2) Under different environmental temperatures, the voltage values of the storage batteries corresponding to the same electric quantity of the storage batteries have larger difference, and the feeding severity and the discharging depth of the storage batteries cannot be accurately judged; 3) the discharging depth of the lead-acid storage battery is in inverse proportional relation with the service life, the deeper the discharging depth is, the shorter the service life is, the discharging depth of the storage battery cannot be accurately judged by starting intelligent power supplement through a voltage threshold, and in order to avoid false triggering of intelligent power supplement, the voltage threshold is set to be low, and deep feeding is generated in the storage battery when the intelligent power supplement is started;
4) and the intelligent power supply failure cannot make judgment and prompt the user.
In view of the above, a vehicle battery charging system includes a low-voltage battery, a low-voltage battery sensor, a battery management system BMS, a high-voltage battery, a body controller BCM, a vehicle control unit VCU, a gateway, and a DCDC, wherein the vehicle control unit VCU, the battery management system BMS, the low-voltage battery sensor, the body controller BCM and the gateway are in communication connection through a bus, by calibrating the open-circuit voltage OCV, the constant current I and the temperature value of the low-voltage storage battery and forming a mapping relation table with the state of charge SOC of the battery, and is recorded in a battery management system, the low-voltage storage battery sensor collects the voltage value, the current value and the temperature value of the low-voltage storage battery regularly and uninterruptedly, and calculating the current SOC of the low-voltage storage battery by an ampere-hour integration method, if the current SOC is lower than the threshold value of the low-voltage storage battery, and inquiring the mapping relation table through the battery management system to obtain the constant current I so as to supplement power to the low-voltage storage battery.
On the basis of the above technical scheme, preferably, the low-voltage battery sensor sends the current SOC to a vehicle body controller BCM through a LIN bus, the vehicle body controller BCM reports the current SOC to a vehicle control unit VCU through a gateway, the vehicle control unit VCU determines a power supplement request through a battery management system mapping relation table, and the battery management system supplements power to the low-voltage battery through the DCDC according to the power supplement request.
On the basis of the above technical solution, preferably, if the current SOC is lower than the threshold of the low-voltage battery, the obtaining of the constant current I to replenish the low-voltage battery by querying the mapping relationship table through the battery management system includes: and starting power supplement when the threshold value of the low-voltage storage battery is less than 75% of SOC.
On the basis of the above technical solution, preferably, if the current SOC is lower than the threshold of the low-voltage battery, the obtaining of the constant current I to replenish the low-voltage battery by querying the mapping relationship table through the battery management system includes: and stopping power supply when the threshold value of the storage battery is 100% SOC.
On the basis of the above technical solution, preferably, the power supply mode is divided into a static power supply mode and a dynamic power supply mode.
On the basis of the technical scheme, preferably, the static electricity supplementing mode is that the low-voltage storage battery is dormant for more than 4 hours, and the static current is less than 500 mA.
On the basis of the technical scheme, preferably, the dynamic power supply mode is the working condition of the whole vehicle or the charging time exceeds 10 minutes.
On the basis of the technical scheme, preferably, the gateway is further connected with the vehicle-mounted T-BOX for communication, the power supplementing request instruction is sent to the vehicle-mounted T-BOX through the gateway, then the power supplementing request instruction is transmitted to the cloud platform through the vehicle-mounted T-BOX, and finally the power supplementing request instruction is sent to the user terminal.
Compared with the prior art, the vehicle storage battery power supply system has the following beneficial effects:
(1) and calibrating corresponding SOC settings simultaneously through a voltage value, a current value and a temperature value, calculating the current SOC of the low-voltage storage battery through an ampere-hour integration method, and if the current SOC is lower than the threshold value of the low-voltage storage battery, inquiring the mapping relation table through the battery management system to obtain the constant current I to supplement power for the low-voltage storage battery, so that the voltage value difference of the low-voltage storage battery at different temperatures is overcome, and the power supplement efficiency and safety are improved.
(2) The T-BOX of the Internet of vehicles is set to transmit the electricity supplementing information in real time, so that the information monitoring of the electricity supplementing by the user is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a vehicle battery charging system according to the present invention;
fig. 2 is a schematic diagram of another vehicle battery recharging system according to another embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
As shown in fig. 1, the present invention provides a vehicle battery recharging system, which includes a low-voltage battery, a low-voltage battery sensor, a battery management system BMS, a high-voltage battery, a body controller BCM, a vehicle control unit VCU, a gateway and a DCDC, wherein the vehicle control unit VCU, the battery management system BMS, the low-voltage battery sensor, the body controller BCM and the gateway are in communication connection through a bus, by calibrating the open-circuit voltage OCV, the constant current I and the temperature value of the low-voltage storage battery and forming a mapping relation table with the state of charge SOC of the battery, and is recorded in a battery management system, the low-voltage storage battery sensor collects the voltage value, the current value and the temperature value of the low-voltage storage battery regularly and uninterruptedly, and calculating the current SOC of the low-voltage storage battery by an ampere-hour integration method, if the current SOC is lower than the threshold value of the low-voltage storage battery, and inquiring the mapping relation table through the battery management system to obtain the constant current I so as to supplement power to the low-voltage storage battery.
As shown in fig. 1, the present invention provides a vehicle battery charging system, which includes a low-voltage battery, a low-voltage battery sensor IBS, a battery management system BMS, a high-voltage battery, a vehicle body controller BCM, a vehicle control unit VCU, a gateway, and a DCDC, wherein the vehicle control unit VCU, the battery management system BMS, the low-voltage battery sensor, the vehicle body controller BCM, and the gateway are sequentially communicatively connected via a bus.
And the open-circuit voltage OCV, the constant current I and the temperature value of the low-voltage storage battery and the state of charge SOC of the battery are determined under lines to form a mapping relation table and recorded in a battery management system BMS. The low-voltage storage battery sensor continuously collects the voltage value, the current value and the temperature value of the low-voltage storage battery every 4 hours, and calculates the current SOC of the low-voltage storage battery by an ampere-hour integration method.
And according to the static or starting of the working condition of the whole vehicle, corresponding to a static mode and a dynamic mode. In a static mode, the low-voltage storage battery is dormant for more than 4 hours, the static current is less than 500mA, and the low-voltage storage battery sensor wakes up the BCM for communication; in a dynamic mode, when the whole vehicle is in a working condition, the voltage of a low-voltage storage battery is lower than 13.5V or the charging time exceeds 10 minutes, and a low-voltage storage battery sensor is communicated with a vehicle body controller BCM. And meanwhile, the low-voltage storage battery sensor transmits the current SOC value of the low-voltage storage battery to the vehicle body controller BCM through the LIN bus.
The vehicle body controller BCM reports the current SOC value of the low-voltage storage battery to a vehicle control unit VCU through a CAN bus, the vehicle control unit VCU obtains the current SOC value of the low-voltage storage battery, the current SOC value is less than or equal to 75% SOC, the current SOC value is sent to a battery management system BMS, a battery management system open-circuit voltage OCV, a constant current value I, a temperature value and battery state of charge SOC mapping relation table are inquired to judge a power supplementing request, when the battery management system controls the high-voltage battery to supplement power to the low-voltage battery through the DCDC according to the power supplementing request, a corresponding charging constant current value I is output, and when a storage battery threshold voltage threshold value is a voltage value corresponding to 100% SOC, power supplementing is stopped.
Referring to fig. 2, the present invention provides a vehicle battery charging system, which includes a low-voltage battery, a low-voltage battery sensor IBS, a battery management system BMS, a high-voltage battery, a vehicle body controller BCM, a vehicle control unit VCU, a gateway, and a DCDC, wherein the vehicle control unit VCU, the battery management system BMS, the low-voltage battery sensor, the vehicle body controller BCM, and the gateway are sequentially connected via a bus in a communication manner.
And the open-circuit voltage OCV, the constant current I and the temperature value of the low-voltage storage battery and the state of charge SOC of the battery are determined under lines to form a mapping relation table and recorded in a battery management system BMS. The low-voltage storage battery sensor continuously collects the voltage value, the current value and the temperature value of the low-voltage storage battery every 4 hours, and calculates the current SOC of the low-voltage storage battery by an ampere-hour integration method.
And according to the static or starting of the working condition of the whole vehicle, corresponding to a static mode and a dynamic mode. In a static mode, the low-voltage storage battery is dormant for more than 4 hours, the static current is less than 500mA, and the low-voltage storage battery sensor wakes up the BCM for communication; in a dynamic mode, when the whole vehicle is in a working condition, the voltage of a low-voltage storage battery is lower than 13.5V or the charging time exceeds 10 minutes, and a low-voltage storage battery sensor is communicated with a vehicle body controller BCM. And meanwhile, the low-voltage storage battery sensor transmits the current SOC value of the low-voltage storage battery to the vehicle body controller BCM through the LIN bus.
The BCM reports the current SOC value of the low-voltage storage battery to a VCU (vehicle control unit) through a CAN (controller area network) bus, the VCU acquires that the current SOC value of the low-voltage storage battery is less than or equal to 75% SOC, and queries a mapping relation table of an open-circuit voltage (OCV), a constant current value (I), a temperature value and a battery state of charge (SOC) of the battery management system to judge a power supplementing request by sending the current SOC value to a BMS (battery management system).
If the VCU of the vehicle controller obtains that the current SOC value of the low-voltage storage battery is smaller than 75% SOC or the feedback information of the VCU of the vehicle controller is not received for 10s, the BCM stops sending the intelligent request, the vehicle continues sleeping until the vehicle is awakened by IBS for the second time, the BCM of the vehicle controller requests the VCU of the vehicle controller to carry out intelligent power supplement again, the BCM of the vehicle controller requests the VCU of the vehicle controller to carry out intelligent power supplement for more than 3 times, the request is stopped being sent to the VCU of the vehicle controller, and the information of the intelligent power supplement failure passes through the vehicle-mounted T-BOX.
When the battery management system controls the high-voltage battery to supplement power to the low-voltage battery through the DCDC according to the power supplement request, the corresponding charging constant current value I is output, and when the threshold voltage threshold value of the storage battery is the voltage value corresponding to 100% SOC, the power supplement is stopped.
The gateway is also connected with the vehicle-mounted T-BOX for communication, the power supplementing request instruction is sent to the vehicle-mounted T-BOX through the CAN bus by the gateway, then the power supplementing request instruction is transmitted to the cloud platform through the vehicle-mounted T-BOX through wireless communication, and finally the power supplementing request instruction is sent to the user terminal, and the user terminal CAN know the charging state and the health state of the low-voltage storage battery in real time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. The utility model provides a vehicle battery system of complementing, the system includes, low pressure battery sensor, battery management system BMS, high-voltage battery, automobile body controller BCM, vehicle control unit VCU, gateway and DCDC, wherein vehicle control unit VCU, battery management system BMS, low pressure battery sensor, automobile body controller BCM and gateway loop through the bus and carry out communication connection, its characterized in that: the method comprises the steps that a mapping relation table is formed by calibrating an open-circuit voltage OCV, a constant current I and a temperature value of a low-voltage storage battery and a battery state of charge (SOC), the mapping relation table is recorded in a battery management system, a low-voltage storage battery sensor continuously collects the voltage value, the current value and the temperature value of the low-voltage storage battery at regular time, the current SOC of the low-voltage storage battery is calculated through an ampere-hour integration method, and if the current SOC is lower than the threshold value of the low-voltage storage battery, the constant current I is obtained through the battery management system to supplement power to the low-voltage storage battery.
2. The vehicle battery power supplementing system according to claim 1, wherein the low-voltage battery sensor sends the current SOC to a vehicle body controller BCM through a LIN bus, the vehicle body controller BCM reports to a vehicle control unit VCU through a gateway, the vehicle control unit VCU determines a power supplementing request through a battery management system mapping table, and the battery management system supplements the low-voltage battery with the high-voltage battery through the DCDC according to the power supplementing request.
3. The vehicle battery recharging system according to claim 1, wherein if the current SOC is lower than the low-voltage battery threshold, the obtaining of the constant current I to recharge the low-voltage battery by the battery management system by querying the mapping relation table comprises: and starting power supplement when the threshold value of the low-voltage storage battery is less than 75% of SOC.
4. The vehicle battery recharging system according to claim 1, wherein if the current SOC is lower than the low-voltage battery threshold, the obtaining of the constant current I to recharge the low-voltage battery by the battery management system by querying the mapping relation table comprises: and stopping power supply when the threshold value of the storage battery is 100% SOC.
5. The vehicle battery power supplement system according to claim 3 or 4, wherein the power supplement mode is divided into a static power supplement mode and a dynamic power supplement mode.
6. The vehicle battery charging system according to claim 5, wherein the static charging mode is a low-voltage battery sleep time of 4 hours or more, and the static current is less than 500 mA.
7. The vehicle battery power supplementing system according to claim 5, wherein the dynamic power supplementing mode is a vehicle operating condition or charging for more than 10 minutes.
8. The vehicle storage battery power supply system according to claim 1, wherein the gateway is further connected with a vehicle-mounted T-BOX for communication, and the power supply request instruction is sent to the vehicle-mounted T-BOX through the gateway, transmitted to the cloud platform by the vehicle-mounted T-BOX, and finally sent to the user terminal.
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| CN202110846790.5A CN113650574B (en) | 2021-07-26 | 2021-07-26 | Battery electricity supplementing system for vehicle |
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| CN202110846790.5A CN113650574B (en) | 2021-07-26 | 2021-07-26 | Battery electricity supplementing system for vehicle |
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| CN114940098A (en) * | 2022-05-31 | 2022-08-26 | 重庆长安新能源汽车科技有限公司 | Double-storage-battery insufficient-power-preventing system and method and electric automobile |
| CN115447513A (en) * | 2022-09-29 | 2022-12-09 | 重庆长安汽车股份有限公司 | Temperature and voltage-based storage battery power shortage prevention system and method and vehicle |
| CN116494825A (en) * | 2023-03-24 | 2023-07-28 | 成都赛力斯科技有限公司 | Vehicle-mounted lithium battery management method and device |
| CN118457283A (en) * | 2024-04-30 | 2024-08-09 | 陕西融和绿动汽车科技有限公司 | Battery compensation control method for new energy automobile |
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