CN114454737A - Battery pack double-precharge high-voltage circuit, control system thereof and electric automobile - Google Patents
Battery pack double-precharge high-voltage circuit, control system thereof and electric automobile Download PDFInfo
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- CN114454737A CN114454737A CN202210178820.4A CN202210178820A CN114454737A CN 114454737 A CN114454737 A CN 114454737A CN 202210178820 A CN202210178820 A CN 202210178820A CN 114454737 A CN114454737 A CN 114454737A
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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
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
- B60L53/10—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles characterised by the energy transfer between the charging station and the vehicle
- B60L53/11—DC charging controlled by the charging station, e.g. mode 4
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L3/00—Electric devices on electrically-propelled vehicles for safety purposes; Monitoring operating variables, e.g. speed, deceleration or energy consumption
- B60L3/0023—Detecting, eliminating, remedying or compensating for drive train abnormalities, e.g. failures within the drive train
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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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- 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
- B60L2240/00—Control parameters of input or output; Target parameters
- B60L2240/40—Drive Train control parameters
- B60L2240/54—Drive Train control parameters related to batteries
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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
- B60L2270/00—Problem solutions or means not otherwise provided for
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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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- 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
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
Two pre-charge high-voltage circuit of battery package and control system, electric automobile, relate to electric automobile power battery system technical field, solve because electric automobile and quick direct current fill the problem that there is the difference in electric pile compatible matching nature, the charging relay adhesion scheduling problem that leads to electric automobile, high-voltage circuit includes control power, the battery manager, the group battery, the fuse, the negative pole relay that charges, the pre-charge group that charges, the anodal relay that charges, the negative pole relay, the pre-charge relay that discharges, pre-charge group and the anodal relay that charges. When the rapid direct-current charging pile is used for charging, the problem that when a capacitive load of a relay-free isolation charging module is adhered to a relay in the rapid direct-current charging pile, the last closed relay of the negative relay, the charging negative relay and the charging positive relay causes adhesion of the last closed relay contact when charging is started is solved, and the charging reliability of the electric automobile is improved.
Description
Technical Field
The invention relates to the technical field of power battery systems of electric automobiles, in particular to a battery pack double-precharge high-voltage circuit, a control system thereof and an electric automobile.
Background
In recent years, electric vehicles have been developed at a high speed in the global scope, and have been developed, produced and sold in a large scale, the application range and application scene of the electric vehicles are increasingly wide, the charging safety and charging reliability have become important concerns inside and outside the industry, and the high-voltage system components of the electric vehicles basically comprise power battery packs, electric drive systems, air-conditioning compressors, PTCs, DC-DCs, high-voltage electric heaters (HVHs) and the like.
When electric automobile used quick direct current to fill electric pile and charges, because of electric automobile and quick direct current fill the problem that there is the difference in electric automobile's the charging relay adhesion of electric automobile with quick direct current fill electric pile compatible matching nature, and electric automobile high voltage part internal capacity load factor influence that does not discharge completely, lead to electric automobile to fail normally to charge.
At present, a charging positive relay and a charging negative relay on a charging loop of an electric vehicle are positioned on a circuit, one is that the charging positive relay is connected to the front ends of the positive relay and a pre-charging relay in a parallel connection mode, and the negative charging relay is connected to the rear end of the negative relay in a series connection mode; the front ends of the positive electrode relay, the negative electrode relay and the pre-charging relay are connected with the battery pack. When the direct-current rapid charging pile is used for charging, a loop is formed and a negative relay, a charging negative relay and a charging positive relay need to be closed; the last closed relay can charge the capacitive load of the charging module at the moment of closing to generate large current impact, so that the contact adhesion of the last closed relay is caused, a high-level fault warning strategy of the electric automobile needs to be triggered, the electric automobile cannot be charged, and the normal use of the electric automobile is influenced.
The other type is that a charging relay is connected in series at the rear end of a positive relay and a pre-charging relay and is connected with a motor control in parallel, before the direct-current quick charging pile charges a battery pack, the positive relay is closed first, then the pre-charging relay is closed to pre-charge a capacitor in the motor control, when the pre-charging voltage reaches a set value, the positive relay is closed to transmit electric energy to the battery pack through the direct-current quick charging pile, the electric vehicle restarts charging in a short time after the charging process stops charging, and the direct-current quick charging pile detects that the charging loop has voltage and exits the charging process because the capacitor in a motor controller is not completely discharged in the self-discharging process.
Disclosure of Invention
The invention aims to solve the problem that charging relays of electric automobiles are adhered due to the difference of compatibility and matching of the electric automobiles and the rapid direct-current charging piles in the prior art; and the influence of the factor that capacitive load in the high-voltage part of the electric automobile is not completely discharged, so that the electric automobile cannot be normally charged and the like, and the battery pack double-precharge high-voltage circuit, the control system thereof and the electric automobile are provided.
The battery pack double-precharge high-voltage circuit comprises a control power supply, a battery manager, a battery pack and a fuse Fu 0; a charging negative electrode relay K0, a charging pre-charging relay K1, a charging pre-charging group R0, a charging positive electrode relay K2, a negative electrode relay K3, a discharging pre-charging relay K4, a discharging pre-charging group R1 and a positive electrode relay K5;
one end of the control power supply is grounded, and the other end of the control power supply is connected with one end of the battery manager; the other end of the battery manager is grounded; the battery manager outputs six driving control power supplies to control the charging negative electrode relay K0, the charging pre-charging relay K1, the charging positive electrode relay K2, the negative electrode relay K3, the discharging pre-charging relay K4 and the charging positive electrode relay K5 to be opened and closed, and outputs six paths of voltages which are respectively used for detecting the voltages of the front end and the rear end of the charging negative electrode relay K0, the charging pre-charging relay K1, the charging positive electrode relay K2, the negative electrode relay K3, the discharging pre-charging relay K4 and the charging positive electrode relay K5;
one end of the high-voltage circuit fuse FU0 is connected with one end of a battery pack, and the other end of the battery pack is respectively connected with a charging negative relay K0 and a negative relay K3;
the other end of the high-voltage circuit fuse FU0 fuse is respectively connected with a charging pre-charging relay K1, a charging positive electrode relay K2, a discharging pre-charging relay K4 and a positive electrode relay K5;
two charging pre-charging resistors R0 are respectively connected with a charging pre-charging relay K1 and a charging positive relay K2;
two ends of the discharging pre-charging resistor R1 are respectively connected with a discharging pre-charging relay K4 and a positive pole relay K5.
The invention provides a control system of a battery pack double-pre-charging high-voltage circuit, which comprises an electric drive system, an air conditioner compressor, a DC-DC power supply, a PTC heater, an HVH and the high-voltage circuit;
one end of a charging negative electrode relay K0 and one end of a charging pre-charging resistor R0 in the high-voltage circuit are both connected with a charging interface;
and the discharging pre-charging resistor R1 is connected with the positive terminals of the electric drive system, the air conditioner compressor, the DC-DC power supply and the HVH, and the negative terminals of the electric drive system, the air conditioner compressor, the DC-DC power supply and the HVH are connected with the negative relay K3.
Another aspect of the present invention provides an electric vehicle including the control system of the high voltage circuit.
The invention has the beneficial effects that:
according to the battery pack double-precharge high-voltage circuit, when the rapid direct-current charging pile is used for charging, the problem that when a capacitive load of a relay-free isolation charging module is adhered to a relay in the rapid direct-current charging pile, a relay which is closed at last in a negative relay, a charging negative relay and a charging positive relay is started to charge the capacitive load of the charging module at the closing moment, large current impact is generated, and the contact of the relay which is closed at last is adhered is solved, and the charging reliability of an electric vehicle is improved.
The battery pack double-precharge high-voltage circuit is characterized in that a charging positive pole relay, a charging precharge relay, a positive pole relay and a discharging precharge relay are connected in parallel, and a charging negative pole relay and a negative pole relay are connected in parallel; during the charging process, electric energy is transmitted to the battery pack through the charging relay without passing through the positive relay and the negative relay, the circuit and the discharging circuit are in parallel connection with the battery pack, the charging is restarted in a short time, and the influence of incomplete self-discharging factors of capacitive loads in an electric drive system is avoided.
Drawings
Fig. 1 is a schematic diagram of a dual pre-charge high voltage circuit of a battery pack according to the present invention;
FIG. 2 is a schematic diagram of a high voltage circuit control system of an electric vehicle according to the present 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be interpreted broadly, e.g., as being fixed or detachable or integrally connected; can be mechanically or electrically connected; either directly or indirectly through intervening media, or through the communication between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The following description is made by combining the accompanying drawings to describe a novel battery pack double-precharge high-voltage circuit control principle provided by the embodiment of the invention, and the principle is characterized in that under the condition that a relay in a direct-current rapid charging pile is adhered to a capacitive load of a relay-free isolation charging module, the contact adhesion of a charging relay caused by an impact current instantaneously generated by closing the charging relay during charging is avoided through the control of a precharge and voltage detection circuit; according to the principle of the double pre-charging high-voltage circuit, the electric vehicle is restarted and charged in a short time after the electric vehicle stops charging, the influence of incomplete self-discharge of capacitive loads in an electric drive system is avoided, and the charging reliability of the electric vehicle is improved.
Fig. 1 is a schematic diagram of a battery pack dual pre-charge high-voltage circuit according to an embodiment of the invention. As shown in fig. 1, the battery pack high voltage circuit includes a control power supply 10; a battery manager 20; a battery pack 201; fuse Fu 0; a charging negative electrode relay K0; a charging pre-charge relay K1; a charging precharge group R0; a charging positive electrode relay K2; a negative electrode relay K3; a discharge pre-charge relay K4; a discharging pre-charging group R1 and a positive relay K5;
one end of the control power supply 10 is grounded, and the other end is connected with the battery manager 20; one end of the battery manager 20 is grounded, six driving control power supplies are output to control the opening and closing of a charging negative electrode relay K0, a charging pre-charging relay K1, a charging positive electrode relay K2, a negative electrode relay K3, a discharging pre-charging relay K4 and a charging positive electrode relay K5, and six paths of voltages are output to detect the voltages of the front end and the rear end of the charging negative electrode relay K0, the charging pre-charging relay K1, the charging positive electrode relay K2, the negative electrode relay K3, the discharging pre-charging relay K4 and the charging positive electrode relay K5; one end of the two ends of the high-voltage circuit fuse FU0 is connected with the battery pack 201, and one end of the battery pack 201 is connected with the charging negative relay K0 and the negative relay K3; one end of the fuse is connected with a charging pre-charging relay K1, a charging positive pole relay K2, a discharging pre-charging relay K4 and a positive pole relay K5; one end of the charging pre-charging resistor R0 is connected with a charging pre-charging relay K1, and the other end is connected with a charging positive relay K2; one end of the discharging pre-charging resistor R1 is connected with a discharging pre-charging relay K4, and the other end is connected with a positive relay K5;
in the embodiment, the battery manager 20 controls the negative relay K3, the discharging pre-charging relay K4 and the positive relay K5 to be switched on and off to realize the on-off of the discharging loop; battery manager 20 controls the relay closing sequence: firstly closing the negative relay K3, then closing the discharging pre-charging relay K4, when the pre-charging time or the battery manager 20 detects that the pre-charging voltage reaches a set value, closing the positive relay K5, and then opening the discharging pre-charging relay K4, so as to complete the high-voltage discharging electrifying process; under high voltage, the positive relay K5 is switched off first, and then the negative relay K3 is switched off. The battery manager 20 in the battery pack controls the charging negative relay K0, the charging pre-charging relay K1 and the charging positive relay K2 to be switched on and off to realize the on-off of a charging loop; battery manager 20 controls the relay closing sequence: firstly closing the charging negative relay K0, then closing the charging pre-charging relay K1, when the pre-charging time or the battery manager 20 detects that the pre-charging voltage reaches a set value, closing the charging positive relay K2, and then opening the charging pre-charging relay K1, so as to complete the high-voltage charging electrifying process; the charging positive relay K2 is switched off first and then the charging negative relay K0 is switched off in the high-voltage low-voltage sequence.
In one embodiment of the invention, the voltage of the control power supply is 12V.
FIG. 2 is a schematic diagram of a high voltage circuit control system of an electric vehicle according to an embodiment of the present invention;
as shown in fig. 2, the control system includes the high voltage circuit, the charging interface, the electric drive system, the air conditioner compressor, the DC-DC, the PTC, and the HVH as shown in fig. 1;
one end of the control power supply 10 is grounded, and the other end is connected with a battery manager 20; one end of the battery manager 20 is grounded, six driving control power supplies are output to control the opening and closing of a charging negative electrode relay K0, a charging pre-charging relay K1, a charging positive electrode relay K2, a negative electrode relay K3, a discharging pre-charging relay K4 and a charging positive electrode relay K5, and six paths of voltages are output to detect the voltages of the front end and the rear end of the charging negative electrode relay K0, the charging pre-charging relay K1, the charging positive electrode relay K2, the negative electrode relay K3, the discharging pre-charging relay K4 and the charging positive electrode relay K5; one end of the two ends of the high-voltage circuit fuse FU0 is connected with the battery pack 201, one end of the battery pack 201 is connected with the charging negative relay K0 and the negative relay K3, and one end of the charging negative K0 is connected with the charging interface; one end of the fuse is connected with a charging pre-charging relay K1, a charging positive pole relay K2, a discharging pre-charging relay K4 and a positive pole relay K5; one end of the charging pre-charging resistor R0 is connected with a charging pre-charging relay K1, and the other end is connected with a charging positive relay K2 and a charging interface; one end of the discharging pre-charging resistor R1 is connected with a discharging pre-charging relay K4, and the other end is connected with the positive pole relay K5 and the positive pole ends of the electric drive system, the air-conditioning compressor, the DC-DC and the HVH; the other end of the negative relay K3 is connected with the negative ends of the electric drive system, the air conditioner compressor, the DC-DC and the HVH.
In one embodiment of the invention, the voltage of the control power supply is 12V.
In this embodiment, the discharge high-voltage power-on and power-off process of the control system is as follows: the battery manager 20 in the battery pack controls the negative relay K3, the discharging pre-charging relay K4 and the positive relay K5 to be closed and opened to realize the on-off of a discharging loop; battery manager 20 controls the relay closing sequence: firstly closing the negative relay K3, then closing the discharging pre-charging relay K4 to pre-charge the capacitive load of the high-voltage part of the electric automobile, when the pre-charging time or the pre-charging voltage detected by the battery manager 20 reaches a set value, closing the positive relay K5, and then opening the discharging pre-charging relay K4, so as to complete the high-voltage discharging and electrifying process; under high voltage, the positive relay K5 is switched off first, and then the negative relay K3 is switched off. The charging negative relay K0, the charging pre-charging relay K1 and the charging positive relay K2 are controlled to be closed and opened by a battery manager 20 in the charging high-voltage up-down current path battery pack of the electric automobile to realize the on-off of a charging loop; the charging battery manager 20 of the direct current charging gun inserted in the electric automobile controls the closing sequence of the relay: firstly, closing a charging negative electrode relay K0, then closing a charging pre-charging relay K1 to pre-charge a capacitive load in the direct current charging pile, closing a charging positive electrode relay K2 when pre-charging time or the battery manager 20 detects that pre-charging voltage reaches a set value, and then disconnecting the charging pre-charging relay K1, so that a high-voltage charging electrifying process is completed; the charging positive relay K2 is switched off first and then the charging negative relay K0 is switched off in the high-voltage low-voltage sequence.
In another embodiment of the present invention, an electric vehicle is provided, which includes an electric vehicle high-voltage circuit control system as shown in fig. 2.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (6)
1. Two pre-charge high-voltage circuit of battery package, characterized by: the circuit comprises a control power supply (10), a battery manager (20), a battery pack (201), a fuse Fu0, a charging negative relay K0, a charging pre-charging relay K1, a charging pre-charging group R0, a charging positive relay K2, a negative relay K3, a discharging pre-charging relay K4, a discharging pre-charging group R1 and a positive relay K5;
one end of the control power supply (10) is grounded, and the other end of the control power supply is connected with one end of the battery manager (20); the other end of the battery manager (20) is grounded; the battery manager (20) outputs six driving control power supplies to control the opening and closing of a charging negative electrode relay K0, a charging pre-charging relay K1, a charging positive electrode relay K2, a negative electrode relay K3, a discharging pre-charging relay K4 and a charging positive electrode relay K5, and outputs six paths of voltages which are respectively used for detecting the voltages of the front end and the rear end of the charging negative electrode relay K0, the charging pre-charging relay K1, the charging positive electrode relay K2, the negative electrode relay K3, the discharging pre-charging relay K4 and the charging positive electrode relay K5;
one end of the high-voltage circuit fuse FU0 is connected with one end of a battery pack (201), and the other end of the battery pack (201) is respectively connected with a charging negative relay K0 and a negative relay K3;
the other end of the high-voltage circuit fuse FU0 fuse is respectively connected with a charging pre-charging relay K1, a charging positive electrode relay K2, a discharging pre-charging relay K4 and a positive electrode relay K5;
two charging pre-charging resistors R0 are respectively connected with a charging pre-charging relay K1 and a charging positive relay K2;
two ends of the discharging pre-charging resistor R1 are respectively connected with a discharging pre-charging relay K4 and a positive pole relay K5.
2. The battery pack dual pre-charge high voltage circuit of claim 1, wherein: the battery manager (20) controls the negative relay K3, the discharging pre-charging relay K4 and the positive relay K5 to be switched on and off to realize the on-off of a discharging loop;
the battery manager (20) controls a relay closing sequence: firstly closing the negative relay K3, then closing the discharging pre-charging relay K4, when the pre-charging time or the battery manager (20) detects that the pre-charging voltage reaches a set value, closing the positive relay K5, and then opening the discharging pre-charging relay K4, so as to complete the high-voltage discharging electrifying process; the high-voltage low-voltage sequence is as follows: the positive relay K5 is disconnected firstly, and then the negative relay K3 is disconnected;
a battery manager (20) in the battery pack controls the charging negative relay K0, the charging pre-charging relay K1 and the charging positive relay K2 to be switched on and off to realize the on-off of a charging loop;
the battery manager (20) controls the relay closing sequence: firstly, closing a charging negative electrode relay K0, then closing a charging pre-charging relay K1, and when the pre-charging time or the pre-charging voltage detected by a battery manager (20) reaches a set value, closing a charging positive electrode relay K2, and then opening the charging pre-charging relay K1, so as to complete the high-voltage charging electrifying process; the high-voltage low-voltage sequence is as follows: the charging positive relay K2 is turned off first, and then the charging negative relay K0 is turned off.
3. The control system of the battery pack dual pre-charge high voltage circuit of claim 1, wherein: the voltage of the control power supply (10) is 12V.
4. Control system of two pre-charge high voltage circuit of battery package, characterized by: the control system comprises an electric drive system, an air conditioner compressor, a DC-DC power supply, a PTC heater, an HVH and a high-voltage circuit of claims 1-3;
one end of a charging negative electrode relay K0 and one end of a charging pre-charging resistor R0 in the high-voltage circuit are both connected with a charging interface;
and the discharging pre-charging resistor R1 is connected with the positive terminals of the electric drive system, the air conditioner compressor, the DC-DC power supply and the HVH, and the negative terminals of the electric drive system, the air conditioner compressor, the DC-DC power supply and the HVH are connected with the negative relay K3.
5. The control system of the battery pack dual pre-charge high voltage circuit of claim 1, wherein:
the discharge high-voltage power-on and power-off process of the control system comprises the following steps: the battery manager (20) controls the negative relay K3, the discharging pre-charging relay K4 and the positive relay K5 to be closed and opened to realize the on-off of a discharging loop; the battery manager (20) controls the relay closing sequence: firstly closing the negative relay K3, then closing the discharging pre-charging relay K4 to pre-charge the capacitive load of the high-voltage part of the electric automobile, when the pre-charging time or the battery manager (20) detects that the pre-charging voltage reaches a set value, closing the positive relay K5, and then opening the discharging pre-charging relay K4, so as to complete the high-voltage discharging and electrifying process; under high voltage, the positive relay K5 is disconnected firstly, and then the negative relay K3 is disconnected;
the charging high-voltage power-on and power-off process comprises the following steps: the battery manager (20) controls the charging negative relay K0, the charging pre-charging relay K1 and the charging positive relay K2 to be switched on and off to realize the on-off of a charging loop; the charging battery manager (20) of the direct current charging gun inserted in the electric automobile controls the closing sequence of the relay: firstly, closing a charging negative electrode relay K0, then closing a charging pre-charging relay K1 to pre-charge a capacitive load in the direct current charging pile, closing a charging positive electrode relay K2 when pre-charging time or a battery manager (20) detects that pre-charging voltage reaches a set value, and then disconnecting the charging pre-charging relay K1, so that a high-voltage charging electrifying process is completed; the charging positive relay K2 is switched off first and then the charging negative relay K0 is switched off in the high-voltage low-voltage sequence.
6. Electric automobile, characterized by: the electric automobile comprises a control system of the battery pack double pre-charging high-voltage circuit in claims 4-5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178820.4A CN114454737A (en) | 2022-02-25 | 2022-02-25 | Battery pack double-precharge high-voltage circuit, control system thereof and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210178820.4A CN114454737A (en) | 2022-02-25 | 2022-02-25 | Battery pack double-precharge high-voltage circuit, control system thereof and electric automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782592A (en) * | 2023-01-05 | 2023-03-14 | 上海鑫悉科技有限公司 | Integrated high-voltage control device |
| CN116080403A (en) * | 2023-02-17 | 2023-05-09 | 中汽研汽车检验中心(广州)有限公司 | Safety protection system for automobile battery pack |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016311A (en) * | 2017-11-30 | 2018-05-11 | 广州汽车集团股份有限公司 | The high-pressure system and its control method of a kind of new-energy automobile |
| CN108333503A (en) * | 2018-01-19 | 2018-07-27 | 北京智行鸿远汽车有限公司 | A kind of pure electric automobile high-voltage relay state detection circuit and method |
| JP2021069229A (en) * | 2019-10-25 | 2021-04-30 | プライムアースＥｖエナジー株式会社 | Secondary battery system |
| CN113561848A (en) * | 2021-06-29 | 2021-10-29 | 东风汽车集团股份有限公司 | Electric vehicle power battery charging and discharging control system and method |
-
2022
- 2022-02-25 CN CN202210178820.4A patent/CN114454737A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108016311A (en) * | 2017-11-30 | 2018-05-11 | 广州汽车集团股份有限公司 | The high-pressure system and its control method of a kind of new-energy automobile |
| CN108333503A (en) * | 2018-01-19 | 2018-07-27 | 北京智行鸿远汽车有限公司 | A kind of pure electric automobile high-voltage relay state detection circuit and method |
| JP2021069229A (en) * | 2019-10-25 | 2021-04-30 | プライムアースＥｖエナジー株式会社 | Secondary battery system |
| CN113561848A (en) * | 2021-06-29 | 2021-10-29 | 东风汽车集团股份有限公司 | Electric vehicle power battery charging and discharging control system and method |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115782592A (en) * | 2023-01-05 | 2023-03-14 | 上海鑫悉科技有限公司 | Integrated high-voltage control device |
| CN116080403A (en) * | 2023-02-17 | 2023-05-09 | 中汽研汽车检验中心(广州)有限公司 | Safety protection system for automobile battery pack |
| CN116080403B (en) * | 2023-02-17 | 2023-07-25 | 中汽研汽车检验中心(广州)有限公司 | Safety protection system for automobile battery pack |
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