CN112462228B - Electric automobile quick-charge loop diagnosis system and diagnosis method thereof - Google Patents
Electric automobile quick-charge loop diagnosis system and diagnosis method thereof Download PDFInfo
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- CN112462228B CN112462228B CN202011254588.5A CN202011254588A CN112462228B CN 112462228 B CN112462228 B CN 112462228B CN 202011254588 A CN202011254588 A CN 202011254588A CN 112462228 B CN112462228 B CN 112462228B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/28—Testing of electronic circuits, e.g. by signal tracer
- G01R31/2832—Specific tests of electronic circuits not provided for elsewhere
- G01R31/2836—Fault-finding or characterising
- G01R31/2843—In-circuit-testing
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- General Engineering & Computer Science (AREA)
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- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Electric Propulsion And Braking For Vehicles (AREA)
Abstract
The invention relates to the technical field of new energy automobile charging, in particular to an electric automobile quick-charging loop diagnosis system and a diagnosis method thereof, wherein the diagnosis method comprises the following steps: s1, after the vehicle is powered down, the vehicle acquires voltage values V1, V2, V3 and V4 in real time; s2, when V2 is less than or equal to V1, jumping to S3, otherwise, reporting the adhesion fault of the negative relay by the vehicle and exiting the quick-charging loop diagnosis flow; s3, the vehicle controls the negative relay to be closed, and after time delay t1, the vehicle jumps to S4; s4, when V2 is more than or equal to V1, jumping to S5, otherwise, the vehicle reporting the failure of the negative relay to be closed and exiting the quick-charging loop diagnosis flow; s5, when V3 is less than or equal to V2 m3, jumping to S6, otherwise, reporting the adhesion fault of the positive relay by the vehicle, pre-charging the adhesion fault of the relay, and then exiting the quick-charging loop diagnosis flow; s6, the vehicle performs high-voltage loop pre-charging, and jumps to S7; the technical scheme of the invention is simple to realize, can effectively detect the safety of the quick-charging loop, and improves the quick-charging safety.
Description
Technical Field
The invention relates to the technical field of new energy automobile charging, in particular to an electric automobile quick-charging loop diagnosis system and a diagnosis method thereof.
Background
The common quick-charging loop diagnosis mode in the current market is a high-pressure sampling method, and if the high-pressure sampling method can not accurately grasp the diagnosis time during the quick-charging loop diagnosis, the high-pressure sampling method often causes misdiagnosis and missed diagnosis.
Disclosure of Invention
The invention aims to provide a quick-charging loop diagnosis system and a diagnosis method thereof for an electric automobile, which are used for solving the problems in the background technology.
The technical scheme of the invention is as follows:
A diagnosis method of an electric automobile quick-charge loop diagnosis system comprises the following steps:
Step S1, after a vehicle is powered down, the vehicle acquires voltage values V1, V2, V3 and V4 of a first voltmeter, a second voltmeter, a third voltmeter and a fourth voltmeter in real time;
Step S2, when the vehicle has a closed fast charge loop requirement, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is less than or equal to V1 and m1, the step S3 is skipped, otherwise, the vehicle reports the adhesion fault of the negative relay and exits the fast charge loop diagnosis flow;
Step S3, the vehicle controls the negative relay to be closed, and the vehicle jumps to step S4 after time delay t 1;
Step S4, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is more than or equal to V1 m2, the vehicle jumps to step S5, otherwise, the vehicle reports that the negative relay cannot close the fault and exits from the quick-charge loop diagnosis flow;
Step S5, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is less than or equal to V2 x m3, the vehicle jumps to step S6, otherwise, the vehicle reports the adhesion fault of the positive relay, the adhesion fault of the pre-charging relay, and then the vehicle exits the quick-charging loop diagnosis flow;
step S6, the vehicle controls the pre-charging relay to be closed, the vehicle performs high-voltage loop pre-charging, and the step S7 is skipped;
step S7, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m4, the vehicle jumps to step S8, otherwise, the vehicle reports that the pre-charge loop cannot be closed and exits from the quick-charge loop diagnosis flow;
step S8, the vehicle controls the positive relay to be closed, the pre-charging relay is disconnected after time delay t2, and then the step S9 is skipped;
step S9, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m5, the vehicle jumps to step S10, otherwise, the vehicle reports that the positive relay cannot close the fault and exits from the quick-charge loop diagnosis flow;
step S10, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is less than or equal to V3 m6, the vehicle jumps to step S11, otherwise, the vehicle reports the adhesion fault of the fast charge positive relay and exits the fast charge loop diagnosis flow;
Step S11, the vehicle controls the fast charging positive relay to be closed, and the step S12 is skipped after time delay t 3;
Step S12, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is more than or equal to V3 m7, the vehicle reports no fault of the quick charge loop and exits the quick charge loop diagnosis process, otherwise, the vehicle reports that the quick charge positive relay K4 cannot close the fault and exits the quick charge loop diagnosis process;
wherein m1, m2, m3, m4, m5, m6 and m7 are coefficient values, and t1, t2 and t3 are time lengths.
Further, the coefficient value m1 is less than m2, m3 is less than m4 and less than or equal to m5, m6 is less than m7, and the value ranges of the coefficient values m1, m2, m3, m4, m5, m6 and m7 are (0, 1).
Further, the time ranges of t1, t2 and t3 are 0 to 3S.
Further, an electric automobile fills return circuit diagnostic system soon, including battery system positive pole, battery system negative pole, fast mouthful positive pole and fast mouthful negative pole that fills, its characterized in that: the diagnosis system comprises a battery pack, a pre-charging resistor electrically connected with the positive electrode of the battery pack and a current sensor electrically connected with the negative electrode of the battery pack, wherein the positive electrode of the pre-charging resistor is electrically connected with the positive electrode of the battery system through a pre-charging relay, the pre-charging resistor and the pre-charging relay are connected with a positive electrode relay in parallel, the positive electrode of a fast charging port is connected with the positive electrode of the battery system in parallel through a fast charging positive relay, the current sensor is electrically connected with the negative electrode of the battery system through a negative electrode relay, a fuse is connected with the negative electrode of the battery system in series, and the negative electrode of the fast charging port is connected with the negative electrode of the battery system in parallel.
Further, the positive pole and the negative pole of the battery pack are connected with a first voltmeter in parallel, the negative poles of the positive pole and the negative pole relay of the battery pack are connected with a second voltmeter in parallel, the negative poles of the positive pole and the negative pole relay of the battery system are connected with a third voltmeter in parallel, and a fourth voltmeter is connected between the positive pole and the negative pole of the battery system in parallel.
Compared with the prior art, the invention provides the electric automobile quick-charge loop diagnosis system and the diagnosis method thereof, which have the following improvements and advantages:
The method comprises the following steps: the technical scheme of the invention is simple in software implementation, and can effectively detect the safety of the quick charge loop, thereby improving the quick charge safety;
and two,: according to the technical scheme, the diagnosis time is regulated by definitely defining the diagnosis flow, the reliability of the diagnosis result is improved, and the quick charge safety of the electric automobile and the electric shock protection safety of electric automobile personnel can be improved.
And thirdly,: according to the technical scheme, parameters can be continuously optimized in a real vehicle calibration mode.
Drawings
The invention is further explained below with reference to the drawings and examples:
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic diagram of the logic determination of the present invention;
Reference numerals illustrate:
A precharge resistor R1; a current sensor Q1; a positive relay K1; pre-charging a relay K2; a negative electrode relay K3; a fast charging positive relay K4; a fuse F1; positive pole pack+ of battery system; negative pole PACK of battery system; positive electrode DC charge+ of the quick charging port; fast Charge negative DC Charge-.
Detailed Description
The following detailed description of the present invention clearly and fully describes the technical solutions of the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The invention provides an electric automobile quick-charge loop diagnosis system and a diagnosis method thereof through improvement:
as shown in fig. 1-2, a diagnosis method of an electric vehicle fast-charging loop diagnosis system includes the following steps:
Step S1, after a vehicle is powered down, the vehicle acquires voltage values V1, V2, V3 and V4 of a first voltmeter, a second voltmeter, a third voltmeter and a fourth voltmeter in real time;
step S2, when the vehicle has a closed fast charge loop requirement, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is less than or equal to V1 and m1, the step S3 is skipped, otherwise, the vehicle reports the adhesion fault of the negative relay K3 and exits the fast charge loop diagnosis flow;
step S3, the vehicle controls the negative relay K3 to be closed, and the vehicle jumps to step S4 after time delay t 1;
step S4, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is more than or equal to V1 m2, the step S5 is skipped, otherwise, the vehicle reports that the negative relay K3 cannot close the fault and exits the quick-charge loop diagnosis flow;
Step S5, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is less than or equal to V2 m3, the vehicle jumps to step S6, otherwise, the vehicle reports the adhesion fault of the positive relay K1, the adhesion fault of the pre-charge relay K2, and then the vehicle exits the quick-charge loop diagnosis flow;
step S6, the vehicle controls the pre-charging relay K2 to be closed, the vehicle performs high-voltage loop pre-charging, and the step S7 is skipped;
step S7, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m4, the vehicle jumps to step S8, otherwise, the vehicle reports that the pre-charge loop cannot be closed and exits from the quick-charge loop diagnosis flow;
Step S8, the vehicle controls the positive relay K1 to be closed, the pre-charging relay K2 is disconnected after time delay t2, and then the step S9 is skipped;
Step S9, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m5, the vehicle jumps to step S10, otherwise, the vehicle reports that the positive relay K1 cannot be closed for fault and exits from the quick charge loop diagnosis flow;
Step S10, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is less than or equal to V3 m6, the step S11 is skipped, otherwise, the vehicle reports the adhesion fault of the fast charge positive relay K4 and exits the fast charge loop diagnosis flow;
Step S11, the vehicle controls the fast charging positive relay K4 to be closed, and the step S12 is skipped after time delay t 3;
Step S12, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is more than or equal to V3 m7, the vehicle reports no fault of the quick charge loop and exits the quick charge loop diagnosis process, otherwise, the vehicle reports that the quick charge positive relay K4K4 cannot close the fault and exits the quick charge loop diagnosis process;
wherein m1, m2, m3, m4, m5, m6 and m7 are coefficient values, and t1, t2 and t3 are time lengths.
The fast charging loop comprises a battery system, a positive electrode relay K1, a pre-charging relay K2, a negative electrode relay K3, a fast charging positive relay K4, a pre-charging resistor R1, a current sensor Q1 and a fuse F1.
The fault states of the positive relay K1, the pre-charging relay K2, the negative relay K3 and the fast charging positive relay K4 are diagnosed by comparing the voltage values of V1, V2, V3 and V4.
Wherein the coefficient value m1 is less than m2, m3 is less than m4 and less than or equal to m5, m6 is less than m7, and the value ranges of the coefficient values m1, m2, m3, m4, m5, m6 and m7 are (0, 1).
The invention defines a detailed diagnosis flow chart, and definitely defines diagnosis time and threshold conditions of each relay, and parameters in the flow chart can be calibrated and optimized.
The time ranges of t1, t2 and t3 are 0-3S, and t1, t2 and t3 can be calibrated and optimized according to vehicles.
The utility model provides an electric automobile fills return circuit diagnostic system soon, including battery system positive pole PACK+, battery system negative pole PACK-, fills mouthful positive pole DC Charge soon + and fills mouthful negative pole DC Charge soon-, its characterized in that: the diagnosis system comprises a battery PACK, a pre-Charge resistor R1 electrically connected with the positive electrode of the battery PACK and a current sensor Q1 electrically connected with the negative electrode of the battery PACK, wherein the positive electrode of the pre-Charge resistor R1 is electrically connected with the positive electrode PACK+ of the battery system through a pre-Charge relay K2, the pre-Charge resistor R1 and the pre-Charge relay K2 are connected with the positive electrode relay K1 in parallel, the positive electrode DC charge+ of the fast charging port is connected with the positive electrode PACK+ of the battery system in parallel through a fast charging positive relay K4, the current sensor Q1 is electrically connected with the negative electrode PACK-of the battery system through a negative electrode relay K3, the negative electrode relay K3 is connected with the negative electrode PACK-of the battery system in series with a fuse F1, and the negative electrode DC Charge-of the fast charging port is connected with the negative electrode PACK-of the battery system in parallel.
The invention diagnoses the specific quick-charging loop of the vehicle, and the invention defines a clear quick-charging loop diagnosis flow, clearly grasps diagnosis time, improves the reliability of diagnosis results, and aims to improve the quick-charging safety and the electric shock protection safety of electric automobile personnel.
The positive pole and the negative pole of the battery PACK are connected with a first voltmeter in parallel, the positive pole of the battery PACK and the negative pole of the negative pole relay K3 are connected with a second voltmeter in parallel, the negative poles of the positive pole PACK+ and the negative pole relay K3 of the battery system are connected with a third voltmeter in parallel, and a fourth voltmeter is connected between the positive pole PACK+ of the battery system and the negative pole PACK-of the battery system in parallel.
The rapid charging loop diagnosis system provided by the invention can collect the total voltage V1 of the battery system, the front-end voltage V2 of the negative electrode relay K3, the rear-end voltage V3 of the rapid charging positive relay K4, the front-end voltage V4 of the rapid charging positive relay K4 and other voltage values.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (3)
1. An electric automobile fast-charging loop diagnosis system and a diagnosis method thereof are characterized in that: the method comprises the following steps:
Step S1, after a vehicle is powered down, the vehicle acquires voltage values V1, V2, V3 and V4 of a first voltmeter, a second voltmeter, a third voltmeter and a fourth voltmeter in real time;
step S2, when the vehicle has a closed fast charge loop requirement, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is less than or equal to V1 and m1, the step S3 is skipped, otherwise, the vehicle reports the adhesion fault of the negative relay (K3) and exits the fast charge loop diagnosis flow;
Step S3, the vehicle controls the negative relay (K3) to be closed, and the vehicle jumps to step S4 after time delay t 1;
Step S4, the vehicle judges the relation between the first voltmeter and the second voltmeter, when V2 is more than or equal to V1 m2, the step S5 is skipped, otherwise, the vehicle reports that the negative relay (K3) cannot close the fault and exits the quick charge loop diagnosis flow;
Step S5, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is less than or equal to V2 m3, the vehicle jumps to step S6, otherwise, the vehicle reports the adhesion fault of the positive relay (K1), the adhesion fault of the pre-charge relay (K2), and then the vehicle exits the quick-charge loop diagnosis flow;
step S6, a vehicle control pre-charging relay (K2) is closed, the vehicle performs high-voltage loop pre-charging, and the step S7 is skipped;
step S7, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m4, the vehicle jumps to step S8, otherwise, the vehicle reports that the pre-charge loop cannot be closed and exits from the quick-charge loop diagnosis flow;
Step S8, the vehicle controls the positive relay (K1) to be closed, the pre-charging relay (K2) is disconnected after time delay t2, and then the step S9 is skipped;
Step S9, the vehicle judges the relation between the third voltmeter and the second voltmeter, when V3 is more than or equal to V2 m5, the vehicle jumps to step S10, otherwise, the vehicle reports that the positive relay (K1) cannot be closed for fault and exits the quick charge loop diagnosis flow;
step S10, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is less than or equal to V3 m6, the vehicle jumps to step S11, otherwise, the vehicle reports the adhesion fault of the fast charge positive relay (K4) and exits the fast charge loop diagnosis flow;
Step S11, the vehicle control fast charging positive relay (K4) is closed, and the step S12 is skipped after time delay t 3;
Step S12, the vehicle judges the relation between the third voltmeter and the fourth voltmeter, when V4 is more than or equal to V3 m7, the vehicle reports no fault of the quick charge loop and exits the quick charge loop diagnosis process, otherwise, the vehicle reports that the quick charge positive relay (K4) K4 cannot close the fault and exits the quick charge loop diagnosis process;
Wherein m1, m2, m3, m4, m5, m6 and m7 are coefficient values, and t1, t2 and t3 are time lengths;
The battery system is characterized by further comprising a battery system anode (PACK+), a battery system cathode (PACK-), a fast charging port anode (DC charge+), and a fast charging port cathode (DC Charge-), wherein the battery system anode (PACK-): the diagnosis system comprises a battery PACK, a pre-Charge resistor (R1) electrically connected with the positive electrode of the battery PACK and a current sensor (Q1) electrically connected with the negative electrode of the battery PACK, wherein the positive electrode of the pre-Charge resistor (R1) is electrically connected with the positive electrode (PACK+) of the battery system through a pre-Charge relay (K2), the pre-Charge resistor (R1) and the pre-Charge relay (K2) are connected with the positive electrode (PACK+) of the battery system in parallel, the positive electrode (DC charge+) of the fast charging port is connected with the positive electrode (PACK+) of the battery system in parallel through a fast charging positive relay (K4), the current sensor (Q1) is electrically connected with the negative electrode (PACK-) of the battery system through a negative electrode relay (K3), the negative electrode relay (K3) is connected with the negative electrode (PACK-) of the battery system in series with a fuse (F1), and the negative electrode (DC Charge-) of the fast charging port is connected with the negative electrode (PACK-) of the battery system in parallel;
The positive pole and the negative pole of the battery PACK are connected with a first voltmeter in parallel, the negative poles of the positive pole and the negative pole relay (K3) of the battery PACK are connected with a second voltmeter in parallel, the negative poles of the positive pole (PACK+) and the negative pole relay (K3) of the battery system are connected with a third voltmeter in parallel, and a fourth voltmeter is connected between the positive pole (PACK+) of the battery system and the negative pole (PACK-) of the battery system in parallel.
2. The diagnostic method of the electric vehicle rapid charging loop diagnostic system according to claim 1, wherein the diagnostic method comprises the following steps: wherein the coefficient value m1 is less than m2, m3 is less than m4 and less than or equal to m5, m6 is less than m7, and the value ranges of the coefficient values m1, m2, m3, m4, m5, m6 and m7 are (0, 1).
3. The diagnostic method of the electric vehicle rapid charging loop diagnostic system according to claim 1, wherein the diagnostic method comprises the following steps: the time ranges of t1, t2 and t3 are 0-3S.
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| CN115107518B (en) * | 2021-03-17 | 2023-12-19 | 观致汽车有限公司 | High-voltage system fault detection method, electric automobile, electronic equipment and storage medium |
| CN114243835A (en) * | 2021-10-09 | 2022-03-25 | 恒大新能源汽车投资控股集团有限公司 | Pre-charging circuit fault diagnosis circuit, method and device |
| CN114236400B (en) * | 2021-12-17 | 2024-07-16 | 东风汽车集团股份有限公司 | Power battery detection method and system and vehicle |
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| CN105610219A (en) * | 2016-01-22 | 2016-05-25 | 安徽江淮汽车股份有限公司 | Charging fault diagnosis method |
| WO2018036249A1 (en) * | 2016-08-24 | 2018-03-01 | 深圳市科列技术股份有限公司 | Main relay adhesion detection circuit of vehicle-mounted battery management system, and detection method therefor |
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| CN109515196B (en) * | 2018-11-16 | 2021-04-13 | 广州小鹏汽车科技有限公司 | Electric vehicle control method, device and system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105610219A (en) * | 2016-01-22 | 2016-05-25 | 安徽江淮汽车股份有限公司 | Charging fault diagnosis method |
| WO2018036249A1 (en) * | 2016-08-24 | 2018-03-01 | 深圳市科列技术股份有限公司 | Main relay adhesion detection circuit of vehicle-mounted battery management system, and detection method therefor |
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