CN114056181A - Relay control system, control method and device and automobile - Google Patents
Relay control system, control method and device and automobile Download PDFInfo
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- CN114056181A CN114056181A CN202010748447.2A CN202010748447A CN114056181A CN 114056181 A CN114056181 A CN 114056181A CN 202010748447 A CN202010748447 A CN 202010748447A CN 114056181 A CN114056181 A CN 114056181A
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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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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/44—Methods for charging or discharging
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
- H02J7/007182—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters in response to battery voltage
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4278—Systems for data transfer from batteries, e.g. transfer of battery parameters to a controller, data transferred between battery controller and main controller
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using 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
Abstract
The invention provides a relay control system, a control method, a control device and an automobile, and relates to the technical field of automobiles. The relay control system includes: the device comprises a battery pack, a main positive relay, a main negative relay, a pre-charging resistor, a load, a first voltage detection unit, a second voltage detection unit and a third voltage detection unit; the first voltage detection unit is connected to two ends of the battery pack; the first end of the second voltage detection unit is connected to a connecting circuit of the pre-charging resistor and the pre-charging relay, and the second end of the second voltage detection unit is connected to the negative end of the battery pack; the first end of the third voltage detection unit is connected to a connecting line of the main positive relay and the load, and the second end of the third voltage detection unit is connected to the negative end of the battery pack. The main and negative relays are controlled by the vehicle control unit and the battery management system, so that the compatibility of the existing control strategy and the control strategy of a supplier of the battery management system is realized.
Description
Technical Field
The invention relates to the technical field of automobiles, in particular to a relay control system, a control method and a device and an automobile.
Background
With the development of science and technology, automobiles become indispensable transportation means in daily life of people; because fuel oil is used as an unrenewable resource, more and more automobile manufacturers gradually focus on research and production of pure electric vehicles in order to reduce the usage amount of the fuel oil. In order to ensure the safety of high-voltage electrification, the closing sequence of the relay is main negative relay closing, pre-charging relay closing, main positive relay closing and pre-charging relay opening under the common condition, wherein the main negative relay is controlled by a vehicle control unit VCU, and the main positive relay and the pre-charging relay are controlled by a battery management system BMS. At that time, it is considered that another relay closing sequence is pre-charge relay closing, main negative relay closing, main positive relay closing and pre-charge relay opening, wherein each relay is controlled by a battery management system BMS. Therefore, in order to accommodate both relay closing sequences described above, improvements to the relay control system are needed.
Disclosure of Invention
The embodiment of the invention provides a relay control system, a control method, a control device and an automobile, which are used for solving the problem of compatibility with a control strategy adopted by a BMS (battery management system) supplier under the condition that a main flow of relay control during high-voltage electrification of the whole automobile is not changed.
In order to solve the above technical problem, an embodiment of the present invention provides a relay control system, including: group battery, main positive relay, main negative relay, pre-charge resistance and load, relay control system still includes:
a first voltage detection unit, a second voltage detection unit and a third voltage detection unit;
the battery pack, the main positive relay, the load and the main negative relay are connected in series to form a loop;
the pre-charging resistor and the pre-charging relay are connected in series and then are connected in parallel at two ends of the main positive relay;
the first voltage detection unit is connected to two ends of the battery pack; the first end of the second voltage detection unit is connected to a connection circuit of the pre-charging resistor and the pre-charging relay, and the second end of the second voltage detection unit is connected to the negative end of the battery pack; and the first end of the third voltage detection unit is connected to a connection line between the main positive relay and the load, and the second end of the third voltage detection unit is connected to the negative end of the battery pack.
Further, the relay control system further includes:
the system comprises a vehicle control unit VCU and a battery management system BMS;
the vehicle control unit is connected with a first control end of the main negative relay;
the battery management system is respectively connected with the second control end of the main positive relay, the second control end of the pre-charging relay and the second control end of the main negative relay;
the first control end of the main positive relay and the first control end of the pre-charging relay are respectively grounded.
Further, the relay control system further includes:
and the pre-charging capacitors are connected in parallel at two ends of the load.
The embodiment of the invention also provides a relay control method, which is applied to the relay control system and comprises the following steps:
when high voltage is applied to the whole vehicle, a first control signal is sent to a whole vehicle controller, and the bottom edge of a main relay and a negative relay is controlled to be closed through the whole vehicle controller;
judging whether the main positive relay and the pre-charging relay are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
when the main positive relay and the pre-charging relay are not adhered, a second control signal is sent to a battery management system, and the pre-charging relay is controlled to be closed through the battery management system;
judging whether the main and negative relays are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and when the main negative relay is not adhered, sending a third control signal to a battery management system, and controlling the high side of the main negative relay to be closed through the battery management system.
Further, the determining whether the main positive relay and the pre-charge relay are stuck according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that neither the main positive relay nor the pre-charge relay is adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main positive relay or the pre-charge relay is stuck.
Further, the determining whether the main and negative relays are stuck according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are not adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are stuck.
Further, after the controlling, by the battery management system, the closing of the high side of the main negative relay, the method further includes:
judging whether the pre-charging is finished or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and after the pre-charging is finished, sending a fourth control signal to a battery management system, and controlling the main positive relay to be closed through the battery management system.
Further, the method further comprises:
judging whether the state of the pre-charging resistor is normal or not according to the voltages respectively detected by the second voltage detection unit and the first voltage detection unit;
and if the first voltage detected by the first voltage detection unit is equal to the second voltage detected by the second voltage detection unit, determining that the state of the pre-charging resistor is normal.
An embodiment of the present invention further provides a relay control device, including:
the first sending module is used for sending a first control signal to the vehicle control unit when the vehicle has high voltage, and controlling the bottom edge of the main and negative relays to be closed through the vehicle control unit;
the first judgment module is used for judging whether the main positive relay and the pre-charging relay are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
the second sending module is used for sending a second control signal to the battery management system when the main positive relay and the pre-charging relay are not adhered, and controlling the pre-charging relay to be closed through the battery management system;
the second judgment module is used for judging whether the main and negative relays are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and the third sending module is used for sending a third control signal to the battery management system when the main and negative relays are not adhered, and controlling the high side of the main and negative relays to be closed through the battery management system.
Further, the first determining module includes:
a first determining unit, configured to determine that neither the main positive relay nor the pre-charge relay is stuck if the first voltage detected by the first voltage detecting unit is equal to the third voltage detected by the third voltage detecting unit;
and the second determining unit is used for determining that the main positive relay or the pre-charging relay is stuck if the first voltage detected by the first voltage detecting unit is not equal to the third voltage detected by the third voltage detecting unit.
The embodiment of the invention also provides an automobile which comprises the relay control device.
The invention has the beneficial effects that:
according to the scheme, the main and negative relays are controlled by the vehicle control unit and the battery management system, so that the compatibility of the existing control strategy and the control strategy of a supplier of the battery management system is realized, and meanwhile, one end of each of the first voltage detection unit, the second voltage detection unit and the third voltage detection unit is connected to the same reference point, so that the overall hardware design cost is reduced.
Drawings
Fig. 1 shows one of the structural schematic diagrams of a relay control system according to an embodiment of the present invention;
FIG. 2 is a second schematic diagram of a relay control system according to an embodiment of the invention;
FIG. 3 is a schematic flow chart diagram of a relay control method according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of a relay control device according to an embodiment of the present invention.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, specific details such as specific configurations and components are provided only to help the full understanding of the embodiments of the present invention. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
The invention provides a relay control system, a control method, a control device and an automobile, aiming at the problem of compatibility with a control strategy adopted by a BMS (battery management system) supplier under the condition that a main flow of relay control during high-voltage electrification of the whole automobile is not changed.
As shown in fig. 1, an embodiment of the present invention provides a relay control system, including: group battery, main positive relay, main negative relay, pre-charge resistance and load, relay control system still includes:
a first voltage detection unit 1, a second voltage detection unit 2, and a third voltage detection unit 3;
the battery pack, the main positive relay, the load and the main negative relay are connected in series to form a loop;
the pre-charging resistor and the pre-charging relay are connected in series and then are connected in parallel at two ends of the main positive relay;
the first voltage detection unit 1 is connected to both ends of the battery pack; the first end of the second voltage detection unit 2 is connected to a connection line between the pre-charging resistor and the pre-charging relay, and the second end is connected to the negative end of the battery pack; and the first end of the third voltage detection unit 3 is connected to a connection line between the main positive relay and the load, and the second end is connected to the negative end of the battery pack.
Specifically, the relay control system further includes:
the system comprises a vehicle control unit VCU and a battery management system BMS;
the vehicle control unit is connected with a first control end of the main negative relay and used for controlling the bottom edge of the main negative relay;
the battery management system is respectively connected with the second control end of the main positive relay, the second control end of the pre-charging relay and the second control end of the main negative relay and is used for controlling the high side of the main negative relay; it should be noted that, the control of the main and negative relays is completed by the vehicle controller and the battery management system together, when the bottom side of the vehicle controller is closed, the main and negative relays are not closed, and only when the bottom side of the vehicle controller is closed and the high side of the battery management system is closed, the main and negative relays are completely closed.
The first control end of the main positive relay and the first control end of the pre-charging relay are respectively grounded.
Specifically, the relay control system further includes:
and the pre-charging capacitors are connected in parallel at two ends of the load.
It should be noted that, in the embodiment of the present invention, the main and negative relays are controlled by the vehicle control unit and the battery management system, so that the compatibility between the existing control strategy and the control strategy of the battery management system provider is achieved, and meanwhile, since one end of each of the first voltage detection unit, the second voltage detection unit, and the third voltage detection unit is connected to the same reference point, the overall hardware design cost is reduced.
In a relay control system as shown in fig. 2, a fourth voltage detection unit 4 is connected to both ends of a battery pack; a first end of the fifth voltage detection unit 5 is connected to a connection line between the pre-charging resistor and the pre-charging relay, and a second end of the fifth voltage detection unit is connected to a connection line between the main negative relay and the load; the sixth voltage detection unit 6 is connected to a connection line between the main positive relay and the load, and the second end is connected to a connection line between the main negative relay and the load. The pre-charging relay and the main positive relay are controlled by a battery management system, and the main negative relay is controlled by the vehicle control unit. The high-voltage electrifying mode comprises the following steps: 1, comparing a fifth voltage detected by a fifth voltage detection unit with a fourth voltage detected by a fourth voltage detection unit, and judging whether the main and negative relays are adhered; 2, if the main and negative relays are not adhered, controlling the main and negative relays to be closed through the vehicle control unit; 3, judging whether the main positive relay or the pre-charging relay is adhered or not by comparing the sixth voltage detected by the sixth voltage detection unit with the fourth voltage detected by the fourth voltage detection unit; 4, if the main positive relay and the pre-charging relay are both adhered, controlling the pre-charging relay to be closed through the battery management system, and starting pre-charging; 5 after the pre-charging is finished, controlling the main positive relay to be closed through a battery management system; 6 the battery management system turns off the pre-charge relay. Thus, high-voltage power-on is completed. The above is the normal relay closing sequence and control method, and the control of each relay by the battery management system is compatible. The embodiment of the invention adjusts the circuit position of the voltage detection unit, thereby realizing the purpose that the battery management system controls the main and negative relays under the condition of not adjusting the vehicle control flow. Further, since one end of each of the first voltage detection unit, the second voltage detection unit and the third voltage detection unit in fig. 1 is connected to the same reference point, the overall hardware design cost is reduced.
As shown in fig. 3, an embodiment of the present invention further provides a relay control method, which is applied to the relay control system described above, where the method includes:
it should be noted that, the control of the main and negative relays is completed by the vehicle controller and the battery management system together, when the bottom side of the vehicle controller is closed, the main and negative relays are not closed, and only when the bottom side of the vehicle controller is closed and the high side of the battery management system is closed, the main and negative relays are completely closed.
Step 32, judging whether the main positive relay and the pre-charging relay are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and step 35, when the main negative relay is not adhered, sending a third control signal to a battery management system, and controlling the high side of the main negative relay to be closed through the battery management system.
It should be noted that, in the embodiment of the present invention, the main and negative relays are controlled by the vehicle control unit and the battery management system, so that the compatibility between the existing control strategy and the control strategy of the battery management system supplier is realized, and the system reliability is improved. In addition, the main and negative relays in the prior art can only be controlled by the vehicle control unit, and when the vehicle control unit fails, the main and negative relays can not be disconnected, but the main and negative relays can be disconnected by hard-wire control through any one of the vehicle control unit and the battery management system, so that the vehicle control system is safer and more reliable.
Specifically, the step 32 of determining whether the main positive relay and the pre-charge relay are stuck according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that neither the main positive relay nor the pre-charge relay is adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main positive relay or the pre-charge relay is stuck.
Specifically, the step 34 of determining whether the main and negative relays are stuck according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are not adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are stuck.
It should be noted that, if the main negative relay is stuck, the third voltage gradually rises to the first voltage, where the rising speed is related to the resistance value of the pre-charge resistor and the size of the capacitor of the entire vehicle.
Specifically, after the step 35 controls the high side of the main negative relay to be closed through the battery management system, the method further includes:
judging whether the pre-charging is finished or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit; and after the pre-charging is finished, sending a fourth control signal to a battery management system, and controlling the main positive relay to be closed through the battery management system.
Note that the precharge is completed when a difference between the first voltage detected by the first voltage detection unit and the third voltage detected by the third voltage detection unit is less than or equal to 10V, or the third voltage is greater than or equal to 95% of the first voltage.
Specifically, the state of the pre-charge resistor needs to be determined, so the method further includes:
judging whether the state of the pre-charging resistor is normal or not according to the voltages respectively detected by the second voltage detection unit and the first voltage detection unit; and if the first voltage detected by the first voltage detection unit is equal to the second voltage detected by the second voltage detection unit, determining that the state of the pre-charging resistor is normal.
As shown in fig. 4, an embodiment of the present invention further provides a relay control device, including:
the first sending module 41 is configured to send a first control signal to the vehicle controller when a high voltage is applied to the vehicle, and the vehicle controller controls the bottom edge of the main and negative relays to be closed;
the first judging module 42 is configured to judge whether the main positive relay and the pre-charge relay are adhered according to voltages detected by the third voltage detecting unit and the first voltage detecting unit respectively;
the second sending module 43 is configured to send a second control signal to the battery management system when neither the main positive relay nor the pre-charge relay is adhered, and control the pre-charge relay to be closed through the battery management system;
the second judging module 44 is configured to judge whether the main and negative relays are adhered according to voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit;
and a third sending module 45, configured to send a third control signal to the battery management system when the main and negative relays are not adhered, and control the high side of the main and negative relays to be closed through the battery management system.
Specifically, the first determining module 42 includes:
a first determining unit, configured to determine that neither the main positive relay nor the pre-charge relay is stuck if the first voltage detected by the first voltage detecting unit is equal to the third voltage detected by the third voltage detecting unit;
and the second determining unit is used for determining that the main positive relay or the pre-charging relay is stuck if the first voltage detected by the first voltage detecting unit is not equal to the third voltage detected by the third voltage detecting unit.
Specifically, the second determining module 44 includes:
a third determining unit, configured to determine that the main and negative relays are not stuck if the first voltage detected by the first voltage detecting unit is equal to the third voltage detected by the third voltage detecting unit;
and the fourth determining unit is used for determining that the main relay and the negative relay are stuck if the first voltage detected by the first voltage detecting unit is not equal to the third voltage detected by the third voltage detecting unit.
Specifically, the relay control device further includes:
the third judging module is used for judging whether the pre-charging is finished or not according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit;
and the fourth sending module is used for sending a fourth control signal to the battery management system after the pre-charging is finished, and controlling the main positive relay to be closed through the battery management system.
The fourth judging module is used for judging whether the state of the pre-charging resistor is normal or not according to the voltages respectively detected by the second voltage detecting unit and the first voltage detecting unit;
the determining module is configured to determine that the state of the pre-charge resistor is normal if the first voltage detected by the first voltage detecting unit is equal to the second voltage detected by the second voltage detecting unit.
The embodiment of the invention also provides an automobile which comprises the relay control device.
It should be noted that, the automobile provided with the relay control device controls the main and negative relays through the vehicle control unit and the battery management system, so that the compatibility of the existing control strategy and the battery management system supplier control strategy is realized, and meanwhile, one end of each of the first voltage detection unit, the second voltage detection unit and the third voltage detection unit is connected to the same reference point, so that the overall hardware design cost is reduced.
While the preferred embodiments of the present invention have been described, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention as defined in the following claims.
Claims (11)
1. A relay control system, comprising: group battery, main positive relay, main negative relay, pre-charge resistance and load, its characterized in that, relay control system still includes:
a first voltage detection unit, a second voltage detection unit and a third voltage detection unit;
the battery pack, the main positive relay, the load and the main negative relay are connected in series to form a loop;
the pre-charging resistor and the pre-charging relay are connected in series and then are connected in parallel at two ends of the main positive relay;
the first voltage detection unit is connected to two ends of the battery pack; the first end of the second voltage detection unit is connected to a connection circuit of the pre-charging resistor and the pre-charging relay, and the second end of the second voltage detection unit is connected to the negative end of the battery pack; and the first end of the third voltage detection unit is connected to a connection line between the main positive relay and the load, and the second end of the third voltage detection unit is connected to the negative end of the battery pack.
2. The relay control system of claim 1, further comprising:
the system comprises a vehicle control unit VCU and a battery management system BMS;
the vehicle control unit is connected with a first control end of the main negative relay;
the battery management system is respectively connected with the second control end of the main positive relay, the second control end of the pre-charging relay and the second control end of the main negative relay;
the first control end of the main positive relay and the first control end of the pre-charging relay are respectively grounded.
3. The relay control system of claim 1, further comprising:
and the pre-charging capacitors are connected in parallel at two ends of the load.
4. A relay control method applied to the relay control system according to any one of claims 1 to 3, characterized by comprising:
when high voltage is applied to the whole vehicle, a first control signal is sent to a whole vehicle controller, and the bottom edge of a main relay and a negative relay is controlled to be closed through the whole vehicle controller;
judging whether the main positive relay and the pre-charging relay are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
when the main positive relay and the pre-charging relay are not adhered, a second control signal is sent to a battery management system, and the pre-charging relay is controlled to be closed through the battery management system;
judging whether the main and negative relays are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and when the main negative relay is not adhered, sending a third control signal to a battery management system, and controlling the high side of the main negative relay to be closed through the battery management system.
5. The relay control method according to claim 4, wherein the determining whether the main positive relay and the pre-charge relay are stuck according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that neither the main positive relay nor the pre-charge relay is adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main positive relay or the pre-charge relay is stuck.
6. The relay control method according to claim 4, wherein the determining whether the main and negative relays are stuck according to the voltages respectively detected by the third voltage detecting unit and the first voltage detecting unit includes:
if the first voltage detected by the first voltage detection unit is equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are not adhered;
and if the first voltage detected by the first voltage detection unit is not equal to the third voltage detected by the third voltage detection unit, determining that the main relay and the negative relay are stuck.
7. The relay control method of claim 4, wherein after the controlling the high side of the main negative relay to close by the battery management system, the method further comprises:
judging whether the pre-charging is finished or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and after the pre-charging is finished, sending a fourth control signal to a battery management system, and controlling the main positive relay to be closed through the battery management system.
8. The relay control method according to claim 4, further comprising:
judging whether the state of the pre-charging resistor is normal or not according to the voltages respectively detected by the second voltage detection unit and the first voltage detection unit;
and if the first voltage detected by the first voltage detection unit is equal to the second voltage detected by the second voltage detection unit, determining that the state of the pre-charging resistor is normal.
9. A relay control apparatus, comprising:
the first sending module is used for sending a first control signal to the vehicle control unit when the vehicle has high voltage, and controlling the bottom edge of the main and negative relays to be closed through the vehicle control unit;
the first judgment module is used for judging whether the main positive relay and the pre-charging relay are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
the second sending module is used for sending a second control signal to the battery management system when the main positive relay and the pre-charging relay are not adhered, and controlling the pre-charging relay to be closed through the battery management system;
the second judgment module is used for judging whether the main and negative relays are adhered or not according to the voltages respectively detected by the third voltage detection unit and the first voltage detection unit;
and the third sending module is used for sending a third control signal to the battery management system when the main and negative relays are not adhered, and controlling the high side of the main and negative relays to be closed through the battery management system.
10. The relay control device according to claim 9, wherein the first determination module includes:
a first determining unit, configured to determine that neither the main positive relay nor the pre-charge relay is stuck if the first voltage detected by the first voltage detecting unit is equal to the third voltage detected by the third voltage detecting unit;
and the second determining unit is used for determining that the main positive relay or the pre-charging relay is stuck if the first voltage detected by the first voltage detecting unit is not equal to the third voltage detected by the third voltage detecting unit.
11. An automobile characterized by comprising the relay control device according to any one of claims 9 to 10.
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| CN202010748447.2A CN114056181A (en) | 2020-07-30 | 2020-07-30 | Relay control system, control method and device and automobile |
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| CN202010748447.2A CN114056181A (en) | 2020-07-30 | 2020-07-30 | Relay control system, control method and device and automobile |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874124A (en) * | 2011-07-14 | 2013-01-16 | 北汽福田汽车股份有限公司 | Relay control strategy and device for battery of electric vehicle |
| CN104553813A (en) * | 2014-12-16 | 2015-04-29 | 惠州市亿能电子有限公司 | Electric automobile high-voltage power-on circuit and control method thereof |
| CN105137336A (en) * | 2015-07-29 | 2015-12-09 | 南通大学 | Diagnostic circuit and diagnostic method for detecting electric vehicle high-voltage relay fault |
| CN108583287A (en) * | 2018-04-28 | 2018-09-28 | 北京新能源汽车股份有限公司 | A kind of electric automobile high-voltage power-on and power-off control method, device and electric vehicle |
| CN109398152A (en) * | 2018-11-01 | 2019-03-01 | 芜湖奇达动力电池系统有限公司 | Plug-in hybrid-power automobile battery system high pressure preliminary filling control method |
| CN109849733A (en) * | 2019-02-19 | 2019-06-07 | 广州小鹏汽车科技有限公司 | The device and method for detecting and handling for electric vehicle high-voltage relay adhesion |
-
2020
- 2020-07-30 CN CN202010748447.2A patent/CN114056181A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102874124A (en) * | 2011-07-14 | 2013-01-16 | 北汽福田汽车股份有限公司 | Relay control strategy and device for battery of electric vehicle |
| CN104553813A (en) * | 2014-12-16 | 2015-04-29 | 惠州市亿能电子有限公司 | Electric automobile high-voltage power-on circuit and control method thereof |
| CN105137336A (en) * | 2015-07-29 | 2015-12-09 | 南通大学 | Diagnostic circuit and diagnostic method for detecting electric vehicle high-voltage relay fault |
| CN108583287A (en) * | 2018-04-28 | 2018-09-28 | 北京新能源汽车股份有限公司 | A kind of electric automobile high-voltage power-on and power-off control method, device and electric vehicle |
| CN109398152A (en) * | 2018-11-01 | 2019-03-01 | 芜湖奇达动力电池系统有限公司 | Plug-in hybrid-power automobile battery system high pressure preliminary filling control method |
| CN109849733A (en) * | 2019-02-19 | 2019-06-07 | 广州小鹏汽车科技有限公司 | The device and method for detecting and handling for electric vehicle high-voltage relay adhesion |
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